A damp-proof and mildew-proof wall

Abstract

This application provides a moisture-proof and mildew-proof wall panel, comprising: a main body assembly and a drainage assembly. The main body assembly includes a first wall panel and a second wall panel bolted to the first wall panel. A placement cavity is provided between the first wall panel and the second wall panel. The drainage assembly includes a water-absorbing layer disposed within the placement cavity, a blower disposed at the top of the placement cavity, and a drainage channel disposed at the bottom of the placement cavity and opposite to the blower. The drainage channel communicates with the outside. When the blower is turned on, it generates an airflow from the top of the placement cavity to the bottom of the placement cavity, drying the water-absorbing layer. Moisture in the water-absorbing layer flows from the top of the placement cavity to the bottom of the placement cavity and is blown towards the drainage channel. This structure improves drainage efficiency.

Description

Technical Field

[0001] This application relates to the field of construction, and more particularly to a moisture-proof and mildew-proof wall. Background Technology

[0002] Moisture-proof and mildew-proof wall panels are wall materials with moisture-proof properties. Their purpose is to prevent liquids from seeping into the wall, thereby alleviating problems such as dampness, mold, rot, or other moisture-related issues.

[0003] Some moisture-proof walls employ a design with an embedded absorbent layer. This layer efficiently absorbs moisture that seeps into the wall, effectively preventing further spread of moisture within the wall structure. However, a significant issue is that because the absorbent layer is sealed within the wall, and the internal temperature is relatively low, this greatly hinders the natural evaporation of moisture.

[0004] Existing technologies, such as Chinese patent CN222206848U, rely on heat transfer components to absorb external heat, such as sunlight, and conduct it to the water-absorbing layer. Evaporation efficiency is limited by ambient temperature. During cloudy, rainy, low-temperature, humid weather, or insufficient sunlight, insufficient heat conduction may prevent effective evaporation of moisture from the water-absorbing layer, causing it to stagnate. Furthermore, the water vapor needs to undergo a complex phase change process of "evaporation-condensation-liquid discharge," posing a risk of condensate backflow, and relying on slope drainage.

[0005] Therefore, a moisture-proof and mildew-proof wall material with improved drainage efficiency is needed. Utility Model Content

[0006] In view of this, it is necessary to provide a moisture-proof and mildew-proof wall that improves drainage efficiency in order to solve the above problems.

[0007] Embodiments of this application provide a moisture-proof and mildew-proof wall, comprising:

[0008] The main body assembly includes a first wall and a second wall bolted to the first wall, with a placement cavity provided between the first wall and the second wall;

[0009] The drainage assembly includes an absorbent layer disposed in the placement cavity, a blower disposed at the top of the placement cavity, and a drainage trough disposed at the bottom of the placement cavity and opposite to the blower, wherein the drainage trough is in communication with the outside.

[0010] When the hair dryer is turned on, it generates an airflow that flows from the top of the placement cavity to the bottom of the placement cavity to dry the absorbent layer; when the moisture in the absorbent layer flows from the top of the placement cavity to the bottom of the placement cavity, it is blown towards the drain trough.

[0011] In at least one embodiment of this application, the hair dryer includes:

[0012] Fan blades are used to generate airflow;

[0013] A heating wire is sleeved on the fan blade and located at one end near the placement cavity; the heating wire is used to generate hot air.

[0014] In at least one embodiment of this application, the drainage channel is provided as a slope, and the drainage channel is formed with a high part and a bottom;

[0015] The slope is provided with a drainage outlet, which is located at the bottom and is connected to the outside of the first wall or the outside of the second wall.

[0016] In at least one embodiment of this application, at least one drainage channel is evenly provided in the absorbent layer, and the drainage channel penetrates the absorbent layer along the height direction of the placement cavity.

[0017] In at least one embodiment of this application, the drainage channel is provided with a contraction portion, which is located at one end near the drainage groove.

[0018] In at least one embodiment of this application, the absorbent layer is made of activated carbon, and the absorbent layer has an activated carbon area near the top of the placement cavity and a drainage area near the bottom of the placement cavity, and the activated carbon area and the drainage area are arranged opposite to each other.

[0019] In at least one embodiment of this application, the activated carbon zone is composed of a plurality of activated carbon sections, and drainage channels isolate two adjacent activated carbon sections.

[0020] In at least one embodiment of this application, a first gap is provided between the activated carbon part and the drainage channel, and a second gap is provided between the activated carbon part and the drainage area.

[0021] In at least one embodiment of this application, the width of the first gap is set to A1, the width of the second gap is set to A2, and the diameter of the activated carbon is set to A3, satisfying the following relationship:

[0022] A1 < A3;

[0023] A2 < A3.

[0024] In at least one embodiment of this application, the absorbent layer is a sponge.

[0025] The aforementioned moisture-proof and mildew-proof wall material uses a blower to carry water droplets along the direction of gravity from top to bottom in a straight line, and then discharges them directly through a drainage channel, thereby improving drainage efficiency. Attached Figure Description

[0026] Figure 1 This is a perspective view of the moisture-proof and mildew-proof wall structure described in this application;

[0027] Figure 2 This is a front view of the moisture-proof and mildew-proof wall structure described in this application;

[0028] Figure 3 This is an exploded view of the moisture-proof and mildew-proof wall structure described in this application;

[0029] Figure 4 This is a left view of the moisture-proof and mildew-proof wall structure described in this application;

[0030] Figure 5 When the absorbent layer of this application is activated carbon, Figure 2 Sectional view of AA;

[0031] Figure 6 When the absorbent layer of this application is activated carbon, Figure 4 Sectional view of BB;

[0032] Figure 7 When the absorbent layer of this application is a sponge, Figure 2 Sectional view of AA;

[0033] Figure 8 When the absorbent layer of this application is a sponge, Figure 4 Sectional view of BB;

[0034] Explanation of main component symbols

[0035] 100. Moisture-proof and mildew-proof wall; 10. Main body component; 11. First wall; 12. Second wall; 13. Placement cavity; 20. Drainage component; 21. Absorbent layer; 211. Drainage channel; 212. Contraction section; 216. Activated carbon area; 217. Drainage area; 213. Activated carbon section; 214. First gap; 215. Second gap; F22. Hair dryer; 221. Fan blade; 222. Heating wire; 23. Drainage groove; 231. High section; 232. Bottom; 233. Drain outlet; 1. Height direction of the placement cavity; Detailed Implementation

[0036] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0037] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0038] This application provides a moisture-proof and mildew-proof wall panel, comprising a body assembly and a drainage assembly. The body assembly includes a first wall and a second wall bolted to the first wall. A placement cavity is provided between the first wall and the second wall. The drainage assembly includes a water-absorbing layer disposed within the placement cavity, a blower disposed at the top of the placement cavity, and a drainage channel disposed at the bottom of the placement cavity and opposite to the blower. The drainage channel communicates with the outside. When the blower is turned on, it generates an airflow from the top of the placement cavity to the bottom of the placement cavity to dry the water-absorbing layer. Moisture in the water-absorbing layer flows from the top of the placement cavity to the bottom of the placement cavity and is blown towards the drainage channel.

[0039] The aforementioned moisture-proof and mildew-proof wall material uses a blower to carry water droplets along the direction of gravity from top to bottom in a straight line, and then discharges them directly through a drainage channel, thereby improving drainage efficiency.

[0040] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] Please see Figures 1-8 This application provides a moisture-proof and mildew-proof wall panel 100, comprising a body assembly 10 and a drainage assembly 20. The body assembly 10 includes a first wall panel 11 and a second wall panel 12 bolted to the first wall panel 11. A placement cavity 13 is provided between the first wall panel 11 and the second wall panel 12. The drainage assembly 20 includes a water-absorbing layer 21 disposed within the placement cavity 13, a blower 22 disposed at the top of the placement cavity 13, and a drainage channel 23 disposed at the bottom 232 of the placement cavity 13 and opposite to the blower 22. The drainage channel 23 communicates with the outside. When the blower 22 is turned on, it generates an airflow that flows from the top of the placement cavity 13 to the bottom 232 of the placement cavity 13, drying the water-absorbing layer 21. Moisture in the water-absorbing layer 21 flows from the top of the placement cavity 13 to the bottom 232 of the placement cavity 13 and is blown towards the drainage channel 23.

[0042] Specifically, the absorbent layer 21 can be made of highly absorbent materials such as silica gel particles or activated carbon absorbent felt, which has passive moisture absorption capabilities. The absorbent layer 21 is installed in the middle of the placement cavity 13 to maximize contact with the upper and lower air ducts, which is conducive to ventilation and drying.

[0043] It absorbs moisture from the air or seeps into the wall over a long period of time, preventing moisture from accumulating inside the wall and thus avoiding mold growth.

[0044] The hair dryer 22 can be a miniature fan, axial fan, or silent fan, etc., and its control logic can be set to start on a timer or triggered by a humidity sensor. The hair dryer 22 is installed at the top, with the airflow direction set from top to bottom. After the hair dryer 22 is started, it delivers air into the placement cavity 13, forming a top-down airflow. This achieves active drying of the water-absorbing layer 21, reducing its humidity and maintaining its moisture-absorbing capacity.

[0045] Drainage channel 23 is located at the bottom 232 and is used to collect condensation or residual liquid from the water-absorbing layer 21. It can be connected to the drainage channel at the bottom of the wall or a conduit can be installed to lead to the building's drainage system.

[0046] When moisture is blown towards the bottom 232 by the airflow, some of it condenses into liquid water and can be discharged in a concentrated manner, preventing secondary accumulation of moisture. The drainage channel 23 is connected to the outside to ensure that moisture and liquid can be efficiently discharged outdoors, avoiding water accumulation inside the enclosed wall.

[0047] Due to external humidity or increased indoor humidity, moisture enters the placement cavity 13 through gaps, infiltration, or air convection. The absorbent layer 21 automatically absorbs and temporarily stores the moisture, acting as a buffer for humidity regulation. When the humidity reaches a certain value or under a timed strategy, the blower 22 starts. The blower blows air in from the top, creating a vertical airflow that passes through the absorbent layer 21 and carries away moisture or water vapor. The water vapor moves downward under the influence of the airflow and may condense into water droplets upon encountering cold air, accumulating at the bottom 232 drainage channel 23. The drainage channel 23 drains the water out of the building or into the indoor drainage system.

[0048] In one specific embodiment, the hair dryer 22 includes a fan blade 221 and a heating wire 222. The fan blade 221 is used to generate airflow. The heating wire 222 is sleeved on the fan blade 221 and is located at one end near the placement cavity 13. The heating wire 222 is used to generate hot air.

[0049] Specifically, the fan blade 221 can be any of an axial fan, centrifugal fan, or cross-flow fan, designed according to the required air volume and wind speed. The preferred material is lightweight plastic, aluminum alloy, or composite engineering plastic. The fan blade 221 is responsible for creating a continuous airflow, allowing the air to flow from the top of the placement cavity 13 to the bottom 232, thereby blowing over the water absorption layer 21 and carrying away moisture.

[0050] The airflow direction is vertically downward or nearly vertical, which is conducive to water vapor being blown towards the drainage channel 23 under the action of gravity.

[0051] The heating wire 222 is a resistance wire structure, which can be a nickel-chromium alloy wire, an iron-chromium-aluminum wire, or a PTC ceramic heating element. The heating wire 222 is sleeved on the fan blade 221 shaft or outer edge fixed bracket, and its structure is consistent with the airflow direction, that is, the hot air flows with the airflow. The heating wire 222 is installed at one end close to the placement cavity 13 to ensure that the heat enters the cavity with the airflow as soon as possible.

[0052] Heating wire 222 heats the air to generate hot air, increasing the airflow temperature. When the hot air enters the placement cavity 13, it performs a more efficient drying process on the water-absorbing layer 21, accelerating moisture evaporation and humidity diffusion. Especially in high humidity or low temperature environments in winter, hot air is crucial for keeping the cavity dry.

[0053] In one specific embodiment, the drainage channel 23 is provided as a slope, and the drainage channel 23 forms a high part 231 and a bottom 232. The slope is provided with a drainage outlet 233, which is located at the bottom 232 and communicates with the outside of the first wall 11 or the outside of the second wall 12.

[0054] Specifically, the bottom 232 of the drainage channel 23 is no longer a horizontal structure, but gradually slopes from one end to the other, forming a high section 231 and a low section, utilizing gravity to achieve natural liquid convergence and flow. The high section 231 and the low section can be formed by molding, injection molding of the inclined channel, or by using inclined supports or slope treatment during on-site construction. The slope angle is usually set between 1° and 8° to ensure smooth drainage without affecting the structural strength of the wall.

[0055] Utilizing the principle of gravity, the condensate or residual water generated during the drying of the absorbent layer 21 is guided to flow to the bottom 232. This prevents water accumulation and stagnation inside the drainage trough 23, eliminating the risk of secondary dampness or bacterial growth.

[0056] The upper part 231 is located near the uphill end of the drainage channel 23. The bottom 232 is the lowest point of the drainage channel 23, the collection point for all liquids. It is particularly emphasized that "the bottom 232 is the lowest point in both width and length of the drainage channel 23," i.e., the lowest point in three dimensions, ensuring complete collection of residual moisture. This forms a stable and reliable liquid collection mechanism, allowing any residual water droplets within the wall to eventually flow naturally into the bottom 232 collection area for unified drainage.

[0057] Drain outlet 233 is a hole, connector, or drain pipe opening located in the bottom area 232; it is usually equipped with an insect screen or filter structure to prevent clogging. It is made of corrosion-resistant metal or weather-resistant plastic. It quickly drains liquid from the bottom 232 of the tank to the outside of the wall, completely eliminating the source of moisture. Drain outlet 233 is the "exit node" of the entire wall, the terminal link in the closed loop of the moisture-proof system. The drainage channel can be selected to lead to the back of the first wall 11 or the front of the second wall 12.

[0058] If the room's interior does not allow for visible drainage, the water can be drained towards the exterior wall. If the room is designed with hollow walls (such as double walls), the water can also be introduced into a hidden pipe and then drained.

[0059] It can be connected to a PVC hose to drain water into the wall, or a drainage hole can be directly embedded to the external wall drainage ditch.

[0060] In one specific embodiment, at least one drainage channel 211 is evenly provided in the absorbent layer 21, and the drainage channel 211 penetrates the absorbent layer 21 along the height direction F1 of the placement cavity.

[0061] Specifically, the absorbent layer 21 material (such as sponge, hydrophilic foam, or absorbent fiber pad) has multiple pore structures distributed internally. Evenly distributed pores mean uniform pore distribution, without offset or accumulation, ensuring consistent drainage performance throughout the absorbent layer 21. This increases the flow rate of moisture within the absorbent layer 21 and prevents localized water accumulation or mold growth due to saturation in a particular area.

[0062] The holes can be directly pressed using mold forming, or processed using methods such as laser perforation or high-pressure water injection. A hole diameter of 1–5 mm is recommended, with a hole spacing of no less than twice the hole diameter, to balance strength and water permeability.

[0063] The drainage channel 211 extends from the top of the absorbent layer 21, near the blower 22, to the bottom 232, near the drainage groove 23. This forms a vertical water guiding path, facilitating the rapid transfer of water under the influence of gravity.

[0064] The blower 22 delivers hot or cold air to dry the absorbent layer 21. After the absorbent layer 21 evaporates or condensation remains, the water quickly falls through the drain holes 211 into the drain trough 23 and is discharged through the drain outlet 233. This significantly reduces the time that moisture remains inside the absorbent layer 21, lightens the load on the absorbent layer 21, and prevents mold growth caused by saturation and failure to drain.

[0065] The air outlet of the blower 22 is oriented in the same direction as the drain hole 211 inside the water absorption layer 21, and the positions are aligned so that the generated airflow can be blown directly into the center area of ​​the drain hole 211.

[0066] In one specific embodiment, the drainage channel 211 is provided with a contraction portion 212, which is located at one end near the drainage groove 23.

[0067] Specifically, the drainage channel 211 is provided in the absorbent layer 21 to guide water to flow downward along the height direction of the placement cavity 13. The contraction section 212 is provided at the end of the drainage channel 211 near the drainage groove 23, that is, at the lower end of the channel.

[0068] By narrowing the cross-section at the outlet of the channel, the liquid is guided to drip in a concentrated manner and the flow rate is controlled.

[0069] In one specific embodiment, the absorbent layer 21 is made of activated carbon, and the absorbent layer 21 has an activated carbon area 216 near the top of the placement cavity 13 and a drainage area 217 near the bottom 232 of the placement cavity 13, and the activated carbon area 216 and the drainage area 217 are arranged opposite to each other.

[0070] Specifically, in one embodiment, the absorbent layer 21 is entirely made of activated carbon material. The absorbent layer 21 is divided into upper and lower functional zones. The activated carbon zone 216 is located near the top of the placement cavity 13. The drainage zone 217 is located near the bottom 232 of the placement cavity 13. The two zones are arranged opposite to each other, forming a vertical "adsorption-water conduction" gradient structure.

[0071] Hot air first flows through the activated carbon zone 216, carrying away the adsorbed moisture and simultaneously pushing the water downwards to the drainage zone 217. The drainage channels 211, located in the absorbent layer 21, extend throughout the entire absorbent layer 21, with the bottom drainage zone 217 (232) responsible for concentrating water into the channels. The drainage trough 23 and the contraction section 212 collect the liquid water seeping from the drainage zone 217 and discharge it to the outside of the wall via a slope. The orientation of the activated carbon zone 216 and the drainage zone 217, combined with the "heat flow + water flow" path of hot air from the top to water guided from the bottom 232, improves the overall dehumidification efficiency of the system.

[0072] Moisture from the wall or indoor environment enters the placement chamber 13 through the first wall 11. The activated carbon zone 216 first strongly adsorbs the moisture, playing a primary drying role. Activated carbon has a porous structure and can adsorb water vapor, formaldehyde, and other volatile substances. The adsorbed water vapor gradually condenses into liquid or moves with the hot air. As adsorption becomes saturated, the liquid moisture gradually seeps downwards into the drainage zone 217. The moisture accumulates in the drainage zone 217 and is guided to the drainage trough 23 through the drainage channels 211. The blower 22 continuously applies hot air to the activated carbon zone 216 and the drainage zone 217, accelerating dehumidification. Finally, the moisture drips into the sloping drainage trough 23 and is discharged to the outside of the wall through the drain outlet 233.

[0073] The activated carbon zone 216 is composed of multiple activated carbon sections 213, and the drainage channel 211 isolates two adjacent activated carbon sections 213.

[0074] Specifically, the activated carbon zone 216 is composed of multiple activated carbon sections 213, meaning that the originally uniform single activated carbon adsorption layer is further modularized into multiple independent activated carbon sections 213, such as strip-shaped, block-shaped, or honeycomb units. Each "activated carbon section 213" can independently perform adsorption. Each activated carbon section 213 independently performs adsorption, reducing the functional degradation caused by local saturation of the overall structure.

[0075] Drainage channels 211 are arranged between two adjacent activated carbon sections 213, serving as the boundary between the activated carbon sections 213, achieving structural isolation and providing a water guiding path. This prevents moisture from spreading laterally in the activated carbon area 216, which would lead to uneven overall moisture absorption. The guiding path function allows moisture or condensate to be discharged along the high → low gravity direction to the lower drainage area 217 or drainage trough 23.

[0076] The hot air blown by the hair dryer 22 passes through the gaps in the drainage holes 211 between the activated carbon sections 213, carrying away the moisture. Because multiple adjacent activated carbon sections 213 are provided, the hot air is forced to flow through the gaps, increasing the contact area between the hot air and the carbon surface and improving the evaporation efficiency.

[0077] A first gap 214 is provided between the activated carbon part 213 and the drainage channel 211, and a second gap 215 is provided between the activated carbon part 213 and the drainage area 217.

[0078] Specifically, the first gap 214 is a structural void between the activated carbon section 213 and its adjacent drainage channel 211, typically serving as a gas passage or a space for moisture release. Maintaining a certain gap not only facilitates the drainage channel 211 in receiving moisture but also provides a path for hot air to pass through. This reduces the "backflow" of moisture by the activated carbon, allowing it to focus more on absorbing moisture from the air rather than adsorbing liquid water.

[0079] The second gap 215 is a structural gap located between the activated carbon section 213 and the lower drainage area 217, serving to assist in guiding water flow and isolate the backflow of drainage moisture. It avoids direct contact and prevents the lower part of the activated carbon from becoming saturated with water. It provides physical space for water to flow downwards under gravity and collect in the drainage trough 23. Simultaneously, it prevents humidity in the drainage area 217 from propagating back into the activated carbon section 213.

[0080] In one specific embodiment, the width of the first gap 214 is set to A1, the width of the second gap 215 is set to A2, and the diameter of the activated carbon is set to A3, satisfying the following relationship:

[0081] A1 < A3;

[0082] A2 < A3.

[0083] Specifically, the width A1 of the first gap 214 is less than the diameter A3 of the activated carbon. This restricts the displacement of the activated carbon, keeps the air duct unobstructed, and prevents the activated carbon from falling.

[0084] The second gap, 215mm wide (A2), is less than the activated carbon diameter (A3). This maintains physical isolation, prevents moisture seepage, and prevents the activated carbon from settling to the bottom.

[0085] If A1 or A2 ≥ A3, activated carbon may fall into the drain hole or sink into stagnant water, weakening its moisture absorption function and causing mold growth. A1 < A3 and A2 < A3 ensure that particles or modules do not enter non-target areas.

[0086] In another embodiment, the absorbent layer 21 is a sponge.

[0087] Specifically, the absorbent layer 21 is a single piece of polyurethane foam, its dimensions closely fitting the boundary of the placement cavity 13. Multiple drainage channels 211 are evenly distributed inside the foam, extending along its height and connecting to a drainage groove 23 at the bottom. The drainage channels form a constriction section 212 near the bottom 232. The air outlet is positioned directly above the drainage channels 211.

[0088] The wall absorbs ambient moisture, and the sponge layer quickly captures the moisture. Under gravity, the moisture gathers in the drainage channels 211 and enters the drainage trough 23. After the blower 22 circulates air, the moisture evaporates from the sponge pores and is discharged through the channels. Once dry, the sponge regains its moisture-absorbing function, achieving a circulating moisture-proof system.

[0089] Therefore, the moisture-proof and mildew-proof wall 100 provided above uses the airflow of the blower 22 to carry water droplets in a straight line along the direction of gravity from top to bottom 232, and discharges them directly through the drainage channel 23, thereby improving drainage efficiency.

[0090] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A moisture-proof and mildew-proof wall covering, characterized in that, include: The main body assembly includes a first wall and a second wall bolted to the first wall, with a placement cavity provided between the first wall and the second wall; The drainage assembly includes an absorbent layer disposed in the placement cavity, a blower disposed at the top of the placement cavity, and a drainage trough disposed at the bottom of the placement cavity and opposite to the blower, wherein the drainage trough is in communication with the outside. When the hair dryer is turned on, it generates an airflow that flows from the top of the placement cavity to the bottom of the placement cavity to dry the absorbent layer; when the moisture in the absorbent layer flows from the top of the placement cavity to the bottom of the placement cavity, it is blown towards the drain trough.

2. The moisture-proof and mildew-proof wall according to claim 1, characterized in that, The hair dryer includes: Fan blades are used to generate airflow; A heating wire is sleeved on the fan blade and located at one end near the placement cavity; the heating wire is used to generate hot air.

3. The moisture-proof and mildew-proof wall according to claim 1, characterized in that, The drainage channel is designed as a slope, and the drainage channel has a high part and a bottom; The slope is provided with a drainage outlet, which is located at the bottom and is connected to the outside of the first wall or the outside of the second wall.

4. A moisture-proof and mildew-proof wall according to claim 1, characterized in that, At least one drainage channel is evenly provided in the absorbent layer, and the drainage channel penetrates the absorbent layer along the height direction of the placement cavity.

5. A moisture-proof and mildew-proof wall according to claim 4, characterized in that, The drainage channel is provided with a contraction section, which is located at one end near the drainage groove.

6. A moisture-proof and mildew-proof wall according to any one of claims 1-5, characterized in that, The absorbent layer is made of activated carbon, and the absorbent layer has an activated carbon area near the top of the placement cavity and a drainage area near the bottom of the placement cavity, and the activated carbon area and the drainage area are arranged opposite to each other.

7. A moisture-proof and mildew-proof wall according to claim 6, characterized in that, The activated carbon zone is composed of multiple activated carbon sections, and drainage channels isolate two adjacent activated carbon sections.

8. A moisture-proof and mildew-proof wall according to claim 7, characterized in that, A first gap is provided between the activated carbon part and the drainage channel, and a second gap is provided between the activated carbon part and the drainage area.

9. A moisture-proof and mildew-proof wall according to claim 8, characterized in that, Let the width of the first gap be A1, the width of the second gap be A2, and the diameter of the activated carbon be A3, satisfying the following relationship: A1 < A3; A2 < A3.

10. A moisture-proof and mildew-proof wall according to any one of claims 1-5, characterized in that... The absorbent layer is made of sponge.

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