A solar-powered humidity pump

Abstract

This invention relates to a solar-powered humidity pump, comprising a first adsorption plate, a second adsorption plate, and a moisture-conducting material; wherein the first and second adsorption plates are connected by a bridging moisture-conducting material. Compared with traditional dehumidification equipment such as air conditioners and refrigerators, this invention has the advantages of simple and efficient structural design, and can achieve low-energy consumption and long-term continuous indoor humidity regulation through solar power without relying on a high-grade heat source. It provides a practical solution to the problem of indoor stuffiness caused by the long-term high temperature and humidity climate in southern my country, demonstrating broad application prospects and potential economic benefits.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of air humidity regulation, and particularly relates to a solar-driven humidity pump. BACKGROUND

[0002] Moist indoor environments can have profound negative effects on occupants and buildings. Elevated humidity levels not only reduce the thermal comfort of occupants, endangering human health, but also easily cause building materials to mildew, affecting the integrity of the building structure. According to several studies conducted by the WHO in the United States, the probability of people getting sick due to moisture or mold in the house is about 50%.

[0003] Dehumidification technologies can be divided into active dehumidification and passive dehumidification according to their action modes. Active dehumidification technology usually relies on electricity or mechanical drive, which has problems such as high energy consumption and complex operation process, and does not meet the current energy-saving and environmental protection trend. In contrast, passive dehumidification technology is a dehumidification method that does not require external energy drive, mainly realizes the adsorption and removal of moisture through physical principles, realizes the dehumidification process of absorbing moisture in high humidity and releasing moisture in low humidity, and has advantages such as energy saving, environmental protection, and sustainable utilization.

[0004] At present, in the current indoor decoration market, traditional humidity regulating building materials such as gypsum board and humidity regulating paint can regulate indoor humidity to a certain extent, but they mainly rely on the pores of the materials themselves to adsorb humid air, which leads to low equilibrium moisture content and insufficient moisture release capacity. In long-term high-humidity climates, when the humidity regulating material maintains a saturated humidity state for a long time, mold is easily bred inside, causing corrosion of the building material. In addition, the adsorption effective time of these traditional humidity regulating building materials is short, and the moisture release speed is slow, which means that in an environment with large humidity fluctuations, they cannot quickly respond and regulate indoor humidity, making it difficult to maintain indoor humidity in a comfortable and stable range. It can be seen that this traditional humidity regulating mechanism is difficult to meet the demand for continuous and efficient moisture absorption in the indoor environment.

[0005] Therefore, researchers often improve the humidity control capacity by adding additives to building materials. Currently, there are two main categories: ① single-type humidity control agents, such as biomass, inorganic salts, and organic polymer humidity control agents; ② composite humidity control agents, such as those prepared using carboxymethyl cellulose, sepiolite, and acrylic acid (AA) / acrylamide (AM) copolymers to produce humidity control agents with excellent humidity control performance [YANG H, PENG Z, ZHOU Y, et al. Preparation and performances of a novel intelligent humidity control composite material[J]. Energy and Buildings, 2011(43):386-392.]. However, to achieve continuous moisture absorption without saturation after adding humidity control agents, a regenerator is required. This increases the building's energy consumption, makes equipment installation more complex, and occupies additional indoor space resources. At the same time, adsorbents have disadvantages such as easy deliquescence, instability, and easy salting out, which reduces their stability and service life. Therefore, even with the addition of a dehumidifier, it is difficult to achieve long-term low-energy dehumidification in high-temperature and high-humidity environments [Ge Tianshu. Theoretical and experimental research on regenerative dehumidification heat exchangers [D]. Shanghai, 2011: Shanghai Jiaotong University].

[0006] It is evident that the dehumidification effect of current humidity control mechanisms using modified indoor building materials is relatively limited. Several significant challenges remain in practical applications, including: 1. Existing devices consume excessive amounts of electricity and other resources; 2. The materials have limited absorption capacity for humid air, easily reaching adsorption saturation; and 3. Existing devices are limited by indoor space constraints. Summary of the Invention

[0007] The technical problem to be solved by this invention is to provide a solar-driven humidity pump that overcomes the shortcomings of existing modified humidity-regulating materials and solves the problems faced in practical applications, such as excessive power consumption in existing devices, limited absorption of humid air by materials leading to easy adsorption saturation, and limitations of indoor space in existing devices.

[0008] The present invention provides a solar-driven humidity pump, characterized in that the solar-driven humidity pump includes a first adsorption plate, a second adsorption plate, and a bridging moisture-conducting material; wherein the first adsorption plate and the second adsorption plate are connected by the bridging moisture-conducting material.

[0009] The first adsorption plate is attached indoors, and the second adsorption plate is attached outdoors. The first and second adsorption plates are connected by a bridging moisture-wicking material. The first adsorption plate adsorbs moisture from the indoor air and transfers it to the bridging moisture-wicking material through capillary action. Under the action of gravity, the moisture is transferred along the bridging moisture-wicking material to the second adsorption plate on the exterior wall. Finally, solar radiation heat drives the moisture to desorb to the external environment.

[0010] The first adsorption plate is positioned higher than the second adsorption plate.

[0011] Preferably, both the first adsorption plate and the second adsorption plate structure include a first substrate layer, an inorganic salt modified moisture-wicking material layer, and a second substrate layer, wherein the inorganic salt modified moisture-wicking material layer is disposed between the first and second substrate layers;

[0012] Preferably, the inorganic salt modified moisture-wicking material layer comprises an inorganic salt modified moisture-wicking material.

[0013] Furthermore, the inorganic salt-modified moisture-wicking material layer comprises an inorganic salt-modified moisture-wicking material and a substrate.

[0014] Preferably, the first adsorption plate and the second adsorption plate are provided with a moisture-wicking material layer containing inorganic salt at 1 / 2 to 1 / 4 of their lengths;

[0015] Preferably, the inorganic salt modified moisture-wicking material in the inorganic salt modified moisture-wicking material layer has a network structure; the substrate in the first adsorption plate and the second adsorption plate has a porous structure.

[0016] Preferably, the inorganic salt modified moisture-wicking material in the inorganic salt modified moisture-wicking material layer accounts for 0.5-4% of the substrate mass.

[0017] The inorganic salt modified moisture-wicking material layers in the first and second adsorption plates may have the same or different content of the inorganic salt modified moisture-wicking material.

[0018] Furthermore, in the first adsorption plate, the inorganic salt modified moisture-wicking material in the inorganic salt modified moisture-wicking material layer accounts for 0.5%-2% of the substrate mass.

[0019] Furthermore, in the second adsorption plate, the inorganic salt modified moisture-wicking material in the inorganic salt modified moisture-wicking material layer accounts for 3%-4% of the substrate mass.

[0020] Preferably, the inorganic salt in the inorganic salt-modified moisture-wicking material includes lithium salt, and the moisture-wicking material includes fibers or textiles; wherein the fibers include one or more of Cool Pass fibers, Modal fibers, and flax fibers; the textiles include textiles of one or more of Cool Pass fibers, Modal fibers, and flax fibers; the substrate includes a porous media material; wherein the porous media material includes, but is not limited to, at least one of gypsum, diatomaceous earth, etc. The lithium salt includes, but is not limited to, LiCl.

[0021] The inorganic salt loading in the inorganic salt modified moisture-wicking material is 10-30% wt (wherein the loading is the percentage of inorganic salt by mass in the modified moisture-wicking material).

[0022] Furthermore, the inorganic salt modified moisture-wicking material comprises: immersing the moisture-wicking material in an inorganic salt solution for 0.5-2 hours to obtain the inorganic salt modified moisture-wicking material; wherein the mass percentage concentration of the inorganic salt solution is 20-40%.

[0023] Preferably, the bridge moisture-wicking material is one of unmodified moisture-wicking material and inorganic salt modified moisture-wicking material.

[0024] Preferably, the inorganic salt in the inorganic salt modified moisture-wicking material includes lithium salt, and the moisture-wicking material includes fibers or textiles; wherein the fibers include one or more of Cool Pass fibers, Modal fibers, and flax fibers; and the textiles include textiles of one or more of Cool Pass fibers, Modal fibers, and flax fibers.

[0025] The inorganic salt loading in the inorganic salt modified moisture-wicking material is 10-30% wt.

[0026] The inorganic salt modified moisture-wicking material is obtained by immersing the moisture-wicking material in an inorganic salt solution for 0.5-2 hours, wherein the mass percentage concentration of the inorganic salt solution is 20-40%.

[0027] The lithium salts include, but are not limited to, LiCl.

[0028] In the first adsorption plate, the inorganic salt modified moisture-wicking material is modified to create a concentration gradient difference between the moisture-wicking material and the substrate, such as gypsum, thereby increasing the moisture-wicking material's attraction to water. In the second adsorption plate, the moisture absorption effect of the inorganic salt modified moisture-wicking material content may be the same as or different from that of the first adsorption plate. The main influencing factor for desorption is the intensity of solar radiation. In addition, the intermediate moisture-wicking fiber serves to connect the indoor and outdoor spaces and construct a water molecule transport channel.

[0029] This invention provides a method for preparing a solar-powered humidity pump, comprising method 1 or method 2:

[0030] Method 1: Impregnate the moisture-wicking material with a lithium salt solution to obtain a lithium salt-modified moisture-wicking material;

[0031] The first part of the base slurry is added to the mold, followed by the second part of the base slurry containing lithium salt modified moisture-wicking material, and then the third part of the base slurry is added. After curing, drying, and demolding, the first adsorption plate is obtained. The second adsorption plate is prepared by the same method. The bridge moisture-wicking fiber is an extension material of the lithium salt modified moisture-wicking material, resulting in a solar-driven humidity pump.

[0032] Alternatively, a solar-driven humidity pump can be obtained by assembling a bridge moisture-wicking material and a first and second adsorption plate.

[0033] Method 2: Lithium salt modified moisture-wicking material is directly poured during the preparation of the first and second adsorption plates, and then the bridge moisture-wicking material and the first and second adsorption plates are assembled, or the bridge moisture-wicking fiber is an extension material of the lithium salt modified moisture-wicking material, to obtain a solar-driven humidity pump.

[0034] The first or second adsorption plate may be the same or different.

[0035] The curing process involves curing under constant temperature and humidity conditions, with a relative humidity of 50%-60% and a temperature of 20-25℃ for 12-24 hours; the drying process involves drying at 40-60℃.

[0036] In methods 1 and 2, the assembly ensures that the moisture transmission channel of the entire system is continuous. In this invention, the fiber felting method is used to connect the pre-reserved fiber of the absorbent panels that are respectively attached to the indoor and outdoor panels, thereby realizing the assembly of the inner and outer panels. The specific assembly method can also be determined according to the actual situation.

[0037] This invention provides an application of the solar-driven humidity pump as a dehumidification device.

[0038] This invention provides an application of the solar-powered humidity pump in hot and humid climates.

[0039] The solar-powered humidity pump of this invention has the following structural features:

[0040] ① Moisture-wicking fiber-modified porous building materials: This part is a key component for the building materials to absorb indoor moisture. It has a fiber-modified layer located inside the porous building material. Fibers with good moisture absorption and stable moisture wicking properties are uniformly embedded inside the porous building material, forming a fiber-modified layer that significantly enhances the moisture absorption capacity of the porous building material. This allows water molecules to actively enter the fiber gaps under the guidance of hydrophilicity. Differential capillary effect occurs in the "capillary space" formed between the fibers, realizing the lateral transport of moisture within the building material.

[0041] ② Moisture-wicking material as a bridge: This part is a key component connecting the fiber-modified layer and the interior and exterior of the wall. Part of the moisture-wicking fiber connects to the fiber-modified porous building material inside the wall, while another part passes through the wall and connects to the exterior structure. Through the moisture-wicking properties of the fiber material and the gravitational pull of water molecules, moisture is transferred from the porous building material inside the wall to the exterior structure. Furthermore, under the influence of solar thermal radiation, water molecules are promoted to desorb from the fiber material.

[0042] The key mechanisms utilized in this invention are:

[0043] ① Combining capillary effect with water potential difference: This mechanism is similar to transpiration in plants, utilizing capillary action to transport water molecules from the roots to the leaves, ultimately evaporating them into the air. The humidity pump utilizes the hydrophilicity of fibers and the capillary structure formed within porous building materials, combined with the indoor-outdoor humidity difference (water potential difference), to guide water molecules from the high-humidity indoor environment to the low-humidity outdoor environment. The essence of capillary action within the capillary structure lies in the fact that the adhesive force generated by hydrogen bonds between water molecules and the cellulose skeleton is greater than the cohesive force formed by hydrogen bonds between water molecules (e.g., ...). Figure 1 As shown in the transmission section, the imbalance of forces pulls water molecules forward continuously, thus realizing the transmission process of water in building materials.

[0044] ② Solar radiation driven: Moisture transferred to the external structure of the wall through the moisture-wicking fibers gains enough energy under the action of solar thermal radiation to change from liquid to gas and desorb from the external structure of the wall, thus achieving a continuous one-way dehumidification process.

[0045] This invention is particularly suitable for regions with a distinct long-term hot and humid climate.

[0046] In hot and humid climates, the main energy consumption of solar-powered humidity pumps is used to handle the moisture load. This invention adds moisture-wicking modified fibers to gypsum board, providing a moisture-conducting channel for water transfer, achieving rapid and efficient moisture transfer against the concentration gradient, while also enhancing the moisture absorption capacity of the gypsum board; under sunlight, the transferred water is released as water vapor, significantly reducing the indoor moisture load, thereby effectively reducing the energy consumption of the air conditioning humidity pump.

[0047] When the hot and humid climate changes to a drier climate with seasonal changes, the water vapor pressure difference between the dry indoor air and the developed gypsum building materials is greater than the affinity of LiCl inorganic salts for water molecules. As a result, the solar-powered humidity pump no longer absorbs indoor moisture, and the indoor relative humidity tends to stabilize.

[0048] In summary, by implementing this invention, it is possible to improve indoor humidity comfort and building energy conservation in regions of southern my country with long-term high temperature and high humidity, and it has great value for promotion and application.

[0049] Beneficial effects

[0050] (1) This invention mainly utilizes solar thermal radiation as the driving force for water evaporation, without the need for additional electricity or other traditional energy sources, thus reducing dependence on limited resources and promoting the sustainable use of energy. As a clean energy source, solar energy does not emit greenhouse gases or other pollutants during its use, which is beneficial to maintaining the ecological environment.

[0051] (2) The solar-driven humidity pump of the present invention transmits moisture to the external structure of the wall through moisture-wicking fibers, avoiding the long-term retention of moisture inside the building materials, and effectively preventing problems such as mold growth and damage to the building structure caused by excessive humidity.

[0052] (3) The solar-driven humidity pump of the present invention is simple and efficient, does not rely on complex equipment or high technical requirements, and does not require additional indoor space resources, making it widely applicable in various building types and uses.

[0053] (4) This invention has significant environmental and potential economic benefits. The humidity pump uses solar energy as its driving force, eliminating the need for high-grade heat sources, significantly reducing operating costs and greenhouse gas emissions, which aligns with the green and low-carbon development trend. The long-lasting and stable dehumidification effect reduces building material corrosion and maintenance costs caused by humidity issues. Attached Figure Description

[0054] Figure 1 This is a schematic diagram illustrating the principle of the solar-powered humidity pump of the present invention; wherein,

[0055] 1: Interior wall; 2: Exterior wall; 3: Solar radiation; 4: Gypsum matrix; 5: Moisture-wicking fiber fabric; 6: Fiber bundle; 7: Cellulose skeleton; 8: Water molecules; 9: Hydrogen bonds.

[0056] Figure 2 The figure shows the experimental results of Example 1, demonstrating the moisture absorption performance of different types of modified fiber-composite gypsum board in a sealed test chamber with a relative humidity greater than 90%. In the experiment, four gypsum board materials were used: pure gypsum board, modified Coolpass-composite gypsum board, modified Modal-composite gypsum board, and modified linseed-composite gypsum board. The relative moisture absorption capacity of different types of gypsum board was reflected by measuring the change in relative humidity inside the test chamber over five hours. In the figure, the black solid line represents the change in relative humidity (%) inside the test chamber for pure gypsum board over time (h), the red solid line represents modified Coolpass-composite gypsum board, the blue solid line represents modified Modal-composite gypsum board, and the green solid line represents modified linseed-composite gypsum board.

[0057] Figure 3 The figures below show the results of Example 2. The upper graph shows the dehumidification effect of the control group on the humid air in the experimental chamber, while the lower graph shows the dehumidification effect of the experimental group on the humid air in the experimental chamber. In the graph, the black curve represents the change in moisture content (g / kg), the red curve represents the change in relative humidity (%), and the blue curve represents the change in temperature (°C). For a detailed description of this graph, please refer to Example 2. Detailed Implementation

[0058] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0059] In Example 1, three types of fiber materials with good moisture conductivity were hydrophilically modified and composited into gypsum board. Through moisture absorption experiments, the Cool Pass modified fiber-composite gypsum board with the best moisture absorption performance was selected. Then, the Cool Pass modified fiber selected in Example 1 was applied to Example 2. In Example 2, indoor and outdoor environmental conditions in a humid and hot region were created through experiments to verify the feasibility of the humidity pump system prepared by Cool Pass modified fiber-composite gypsum board in adsorbing indoor moisture and transferring it to the outdoor desorption area.

[0060] Example 1

[0061] This embodiment of the composite gypsum board structure comprises: a first gypsum board layer, a modified fiber layer, and a second gypsum board layer, with the modified fiber layer positioned between the first and second gypsum board layers. The modified fiber layer is located at one-third of the composite gypsum board and is composed of modified fibers and gypsum, wherein the modified fibers constitute 0.5% of the gypsum powder mass of that layer. The modified fibers are prepared by impregnating them in a 40% (w / w) LiCl solution to obtain LiCl-modified fibers. The LiCl loading in the modified fibers is 20% wt, and the modified fibers are selected from LiCl-modified Coolpass, LiCl-modified flax, and LiCl-modified Modal.

[0062] This embodiment mainly focuses on the preferred selection of fiber-composite gypsum board, involving three pieces each of pure gypsum board (100mm×100mm×20mm), modified Coolpass-composite gypsum board, modified linseed-composite gypsum board, and modified Modal-composite gypsum board with dimensions of 100mm×100mm×20mm.

[0063] The specific preparation method and process are as follows:

[0064] (1) First, mix the raw material gypsum powder, water and white cement in a mass ratio of 1:0.5:0.05 and stir in a container for 15-20 minutes until the mixture is uniform to obtain pure gypsum slurry.

[0065] (2) Pour 1 / 3 of the above gypsum slurry into a 100mm×100mm×20mm mold, lay the modified fiber fabric, and then slowly pour in the remaining 2 / 3 of the gypsum slurry.

[0066] (3) Place the sample in an environment of 23℃ and ~50%RH for 24 hours, and then put the sample into an oven for drying. During this period, the oven temperature should be slowly increased from 30℃ to 55℃ to prevent cracks from appearing in the early stage of drying.

[0067] (4) After the sample is dried to constant weight, it is placed in a constant temperature and humidity (23℃, ~50%RH) environment for curing until constant weight. Once the sample reaches a stable state, the next step of the experiment can be carried out.

[0068] This embodiment places four different types of gypsum board in a sealed test chamber with a relative humidity greater than 90%. By measuring the change in relative humidity within the test chamber over five hours, the relative moisture absorption capacity of the different types of gypsum board is reflected. Figure 2 As shown in the image, it can be clearly observed that the relative humidity curve corresponding to the modified Coolpass-composite gypsum board decreases the fastest and the most significantly, indicating that the modified Coolpass-composite gypsum board has the best moisture absorption capacity, verifying that the selected fiber in this invention has the best moisture absorption.

[0069] Example 2

[0070] This implementation mainly verifies the effect of the solar-driven humidity pump system, which includes a first adsorption plate, a bridge moisture-wicking material, and a second adsorption plate in sequence.

[0071] The structure of the first and second adsorption plates involves a bridging moisture-wicking material embedded within them. The preparation process of this humidity pump sample is as follows:

[0072] (1) First, mix the raw material gypsum powder, water and white cement in a mass ratio of 1:0.5:0.05 and stir in a container for 15-20 minutes until the mixture is uniform to obtain pure gypsum slurry.

[0073] (2) Inject 1 / 3 of the above gypsum slurry into a 100mm×100mm×20mm mold, lay the modified fiber fabric, and then slowly inject the remaining 2 / 3 of the gypsum slurry to obtain the first adsorption plate.

[0074] (3) Inject 1 / 2 of the gypsum slurry into a 100mm×100mm×5mm mold, lay the modified fiber fabric, and then slowly inject the remaining 1 / 2 of the gypsum slurry to obtain the second adsorption plate, wherein the modified fiber between the first and second adsorption plates is continuous.

[0075] (4) Place the sample in an environment of 23℃ and ~50%RH for 24 hours, and then put the sample into an oven for drying. During this period, the oven temperature should be slowly increased from 30℃ to 55℃ to prevent cracks from appearing in the early stage of drying.

[0076] (5) After the sample is dried to constant weight, it is placed in a constant temperature and humidity (23℃, ~50%RH) environment for curing until constant weight.

[0077] Once the sample reaches a stable state, the next step of the experiment can be carried out.

[0078] The method for preparing the LiCl modified cool pass fiber is to immerse the fiber in a LiCl solution with a mass percentage concentration of 40% for 1 hour to obtain the LiCl modified fiber. The LiCl loading in the modified cool pass fiber is 20% wt.

[0079] The bridge's moisture-wicking material is a LiCl-modified cool pass fiber fabric, which facilitates the transport of moisture from indoors to outdoors.

[0080] This embodiment is based on Figure 1 As illustrated, the indoor and outdoor environments simulated in this embodiment are achieved by a humidity pump that transfers moisture from indoors (adsorbed) to outdoors (desorbed).

[0081] The examples were divided into an experimental group and a control group.

[0082] The specific setup conditions for the experimental group were as follows: the first adsorption plate was placed in a sealed experimental chamber with an internal moisture source, which simulated the indoor environment (26℃) and controlled the humidity to circulate between 75-90%RH (moisture content 15.88-19.15g / kg); the second adsorption plate was placed in a sealed experimental chamber with a heat source and a moisture source, which simulated the high temperature and high humidity outdoor environment (temperature 35℃, relative humidity ~65%RH, moisture content ~23.29g / kg), where the temperature of the second adsorption plate was approximately 50℃ (simulating the plate temperature under solar radiation), and the moisture-wicking fiber served as a bridge connecting the indoor and outdoor environments to ensure the continuity of the system.

[0083] The control group was set up in the same way as the experimental group except that the second adsorption plate was omitted.

[0084] Experimental data graph as follows Figure 3 As shown, the humidity pump system in the experimental group was able to continuously pump humidity from indoors to outdoors, compared with the control group. The control group only absorbed moisture on the indoor side, and its moisture absorption rate decreased significantly over time, confirming the feasibility and effectiveness of solar-driven humidity pumps.

[0085] Specific application methods of the present invention:

[0086] (1) Select a solar-driven humidity pump with an appropriate thickness based on the wall thickness of the application area;

[0087] (2) Select a suitable location on a wall that is connected to the outside and embed the solar-powered humidity pump obtained in this invention;

[0088] (3) Apply latex paint, etc., according to the standard wall painting process.

[0089] Testing showed that installing the solar-powered humidity pump of this invention can continuously and effectively reduce the relative humidity of indoor air, reducing the use of dehumidifiers, air conditioners and other equipment. At the same time, this humidity pump can circulate moisture absorption and dehumidification for a long time, reducing the consumption of manpower, material resources and energy.

Claims

1. A solar-powered humidity pump, characterized in that, The solar-driven humidity pump includes a first adsorption plate, a second adsorption plate, and a bridging moisture-wicking material; wherein the first adsorption plate and the second adsorption plate are connected by the bridging moisture-wicking material. The first adsorption plate is attached indoors, and the second adsorption plate is attached outdoors. The first and second adsorption plates are connected by a bridging moisture-wicking material. The first adsorption plate adsorbs moisture from the indoor air and transfers it to the bridging moisture-wicking material through capillary action. Under the action of gravity, the moisture is transferred along the bridging moisture-wicking material to the second adsorption plate on the exterior wall. Finally, solar radiation heat drives the moisture to desorb to the external environment. Both the first adsorption plate and the second adsorption plate structure include a first substrate layer, an inorganic salt modified moisture-wicking material layer, and a second substrate layer, wherein the inorganic salt modified moisture-wicking material layer is disposed between the first substrate layer and the second substrate layer; The inorganic salt modified moisture-wicking material layer includes inorganic salt modified moisture-wicking material; The inorganic salt in the inorganic salt modified moisture-wicking material includes lithium salt, and the moisture-wicking material includes fibers or textiles; the substrate includes a porous media material; and the porous media material includes at least one of gypsum and diatomaceous earth.

2. The solar-driven humidity pump according to claim 1, characterized in that, The first adsorption plate and the second adsorption plate are provided with a moisture-wicking material layer containing inorganic salt at 1 / 2 to 1 / 4 of their lengths; The inorganic salt-modified moisture-wicking material in the layer has a network structure. The substrates in the first and second adsorption plates are porous structures.

3. The solar-driven humidity pump according to claim 1, characterized in that, The fibers include one or more of Cool Pass fibers, Modal fibers, and flax fibers; the textiles include textiles made of one or more of Cool Pass fibers, Modal fibers, and flax fibers. The inorganic salt modified moisture-wicking material layer includes an inorganic salt modified moisture-wicking material and a substrate, wherein the inorganic salt modified moisture-wicking material in the inorganic salt modified moisture-wicking material layer accounts for 0.5-4% of the mass of the substrate.

4. The solar-driven humidity pump according to claim 1, characterized in that, The bridge moisture-wicking material is one of the following: unmodified moisture-wicking material or inorganic salt modified moisture-wicking material.

5. The solar-driven humidity pump according to claim 4, characterized in that, The inorganic salts in the bridge moisture-wicking material include lithium salts; the moisture-wicking material includes fibers or textiles; wherein the fibers include one or more of Cool Pass fibers, Modal fibers, and flax fibers; and the textiles include textiles of one or more of Cool Pass fibers, Modal fibers, and flax fibers.

6. A method for preparing the solar-powered humidity pump according to any one of claims 1-5, comprising method 1 or method 2: Method 1: Impregnate the moisture-wicking material with a lithium salt solution to obtain a lithium salt-modified moisture-wicking material; The first part of the base slurry is added to the mold, followed by the second part of the base slurry containing lithium salt modified moisture-wicking material, and then the third part of the base slurry is added. After curing, drying, and demolding, the first adsorption plate is obtained. The second adsorption plate is prepared using the same method. The bridge moisture-wicking material is an extension of the lithium salt-modified moisture-wicking material, which can be used to obtain a solar-driven humidity pump, or the bridge moisture-wicking material and the first and second adsorption plates can be assembled to obtain a solar-driven humidity pump. Method 2: Lithium salt modified moisture-wicking material is directly cast during the preparation of the first and second adsorption plates. The bridge moisture-wicking material is an extension of the lithium salt modified moisture-wicking material to obtain a solar-driven humidity pump. Alternatively, the bridge moisture-wicking material and the first and second adsorption plates are assembled to obtain a solar-driven humidity pump.

7. The application of the solar-powered humidity pump of claim 1 as a dehumidification device.

8. The application of the solar-powered humidity pump of claim 1 in a hot and humid climate.

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