Solar-driven humidity pump

Abstract

The invention relates to a solar-driven humidity pump. The solar-driven humidity pump comprises a first adsorption plate, a second adsorption plate and a moisture conducting material, wherein the first adsorption plate and the second adsorption plate are connected through a bridge moisture conducting material. Compared with traditional dehumidification equipment such as an air conditioner and a refrigerating machine, the indoor humidity adjusting device has the advantages that the structural design is simple and efficient, and low-energy-consumption and long-lasting indoor humidity adjustment can be achieved through solar driving without depending on a high-grade heat source; a feasible solution is provided for solving the problem of indoor stuffiness and humidity caused by long-term high-temperature and high-humidity climate in the south of China, and wide application prospects and potential economic benefits are shown.

Description

Technical Field

[0001] The invention belongs to the field of air humidity regulation, and in particular relates to a solar-driven humidity pump. Background Art

[0002] A humid indoor environment can have a profound negative impact on occupants and buildings. Increased humidity levels not only reduce thermal comfort for residents and harm human health, but also make building materials susceptible to mold and affect the structural integrity of the building. According to several studies conducted by the WHO in the United States, the probability of people becoming ill due to moisture or mold in a house is about 50%.

[0003] Dehumidification technology can be divided into active dehumidification and passive dehumidification according to its mode of action. Active dehumidification technology usually relies on electricity or mechanical drive, and has problems such as high energy consumption and complex operation process, which does not conform to the current trend of energy conservation and environmental protection. In contrast, passive dehumidification technology is a dehumidification method that does not require external energy drive. It mainly uses physical principles to achieve the adsorption and removal of moisture, and realizes the dehumidification process of absorbing moisture when the indoor humidity is high and releasing moisture when the humidity is low. It has the advantages of energy conservation, environmental protection, and sustainable utilization.

[0004] At present, in the current interior 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 material's own pores to adsorb humid air, which leads to a low equilibrium moisture content and particularly insufficient dehumidification capacity. In a long-term high-humidity climate, when the adjustment material remains in a state of humidity saturation for a long time, mold is easy to grow inside, causing corrosion of the building materials. In addition, these traditional humidity-regulating building materials have a short effective adsorption time and a slow dehumidification rate, which means that in an environment with large humidity fluctuations, they cannot respond quickly and adjust the indoor humidity, making it difficult to maintain the indoor humidity within a comfortable and stable range. It can be seen that this traditional humidity-regulating mechanism is difficult to meet the indoor demand for continuous and efficient moisture absorption.

[0005] To this end, researchers often improve the humidity control ability by adding some additives to building materials. Currently, there are two main categories: ① single type of humidity control agent, such as biomass, inorganic salts, organic polymer humidity control agents, ② composite humidity control agents, such as carboxymethyl cellulose, sepiolite and acrylic acid (AA) / acrylamide (AM) copolymer to prepare a humidity control agent 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, after adding the humidity control agent, in order to achieve continuous moisture absorption without saturation, a regenerator must be equipped, which will increase the energy consumption of the building, make the equipment installation more complicated, and occupy additional indoor space resources; at the same time, the adsorbent has the disadvantages of easy deliquesce, instability, easy salting out, etc., which reduces its stability and service life. Therefore, in a high temperature and high humidity environment, it is difficult to achieve long-term low-energy dehumidification even if a humidity control agent is added [Ge Tianshu. Theoretical and experimental research on regenerative dehumidification heat exchanger [D]. Shanghai., 2011: Shanghai Jiaotong University].

[0006] It can be seen that the dehumidification effect of the humidity control mechanism through the modification of indoor building materials is relatively limited. There are still important problems in practical applications, such as: 1. Existing devices consume too much electricity and other resources in energy supply; 2. The material has limited absorption of humid air and is easy to reach adsorption saturation; 3. Existing devices are limited by indoor space, etc. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a solar-driven humidity pump to overcome the shortcomings of existing modified humidity-control materials, solve the problems faced in practical applications such as the existing devices consuming too much electricity and other resources in energy supply, the limited absorption of humid air by the materials, easy adsorption saturation, and the existing devices being limited by indoor space.

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

[0009] The first adsorption plate is attached indoors, the second adsorption plate is attached outdoors, and the first adsorption plate and the second adsorption plate are connected by a bridge moisture-conducting material, wherein the first adsorption plate adsorbs moisture from the indoor air and transfers it to the bridge moisture-conducting material through capillary action, and under the action of gravity, the moisture is transferred along the bridge moisture-conducting material to the second adsorption plate on the outer wall, and finally the solar radiation heat drives the moisture to desorb to the external environment.

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

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

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

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

[0014] Preferably, a moisture-conducting material layer containing inorganic salt modification is provided at 1 / 2 to 1 / 4 of the first adsorption plate and the second adsorption plate;

[0015] Preferably, the inorganic salt-modified moisture-conducting material in the inorganic salt-modified moisture-conducting material layer is in a network structure; and the substrates in the first adsorption plate material and the second adsorption plate material are in a porous structure.

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

[0017] The inorganic salt modified moisture conductive material layer in the first adsorption plate and the second adsorption plate has the same or different contents of the inorganic salt modified moisture conductive material.

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

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

[0020] Preferably, the inorganic salt in the inorganic salt-modified moisture-conducting material includes a lithium salt, and the moisture-conducting material includes fibers or textiles; wherein the fibers include one or more of cool pass fibers, modal fibers, and flax fibers; the textiles include one or more of cool pass fibers, modal fibers, and flax fibers; the substrate includes a porous medium material; wherein the porous medium material includes but is not limited to at least one of gypsum, diatom mud, etc. The lithium salt includes but is not limited to LiCl.

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

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

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

[0024] Preferably, the inorganic salt in the inorganic salt-modified moisture-conducting material includes lithium salt, and the moisture-conducting material includes fiber or textile; wherein the fiber includes one or more of cool pass fiber, modal fiber, and flax fiber; the textile includes one or more of cool pass fiber, modal fiber, and flax fiber.

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

[0026] The inorganic salt modified moisture conducting material: the moisture conducting material is immersed in an inorganic salt solution for 0.5-2 hours to obtain the inorganic salt modified moisture conducting material, wherein the mass percentage concentration of the inorganic salt solution is 20-40%.

[0027] The lithium salt includes but is not limited to LiCl.

[0028] The moisture-conducting material in the inorganic salt-modified moisture-conducting material in the first adsorption plate is modified to form a concentration gradient difference between the moisture-conducting material and a substrate such as gypsum, thereby increasing the moisture-conducting material's attraction to water; the moisture absorption effect of the inorganic salt-modified moisture-conducting material in the second adsorption plate is the same or different from that of the first adsorption plate, and the main influencing factor of desorption is the intensity of solar radiation. In addition, the role of the intermediate moisture-conducting fiber is to connect indoors and outdoors and construct a water molecule transmission channel.

[0029] The present invention provides a method for preparing a solar-driven humidity pump, comprising method 1 or method 2:

[0030] Method 1: Immersing the moisture-conducting material in a lithium salt solution to obtain a lithium salt-modified moisture-conducting material;

[0031] Add the first part of the base slurry into the mold, then add the second part of the base slurry containing the moisture-conducting material modified by the lithium salt, and then add the third part of the base slurry, maintain, dry, and demould to obtain the first adsorption plate; the material and method are used to prepare the second adsorption plate; the bridge moisture-conducting fiber is an extension material of the moisture-conducting material modified by the lithium salt, and a solar-driven humidity pump is obtained;

[0032] or assembling the bridge moisture conducting material and the first adsorption plate and the second adsorption plate to obtain a solar-driven humidity pump;

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

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

[0035] The curing is carried out under constant temperature and humidity conditions, wherein the relative humidity is 50%-60% and the temperature is 20-25° C. for 12-24 hours; and the drying is carried out at 40-60° C.

[0036] The assembly in the method 1 and the method 2 ensures that the moisture transmission channel of the whole system is continuous after assembly. In the present invention, the fiber felting reserved for the adsorption plates respectively attached to the indoor and outdoor is connected by needle felting to realize the assembly of the inner and outer plates. The specific assembly method can also be determined according to the actual situation.

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

[0038] The present invention provides an application of the solar-driven humidity pump in hot and humid climates.

[0039] The structure of the solar-driven humidity pump of the present invention has the following characteristics:

[0040] ① Moisture-conducting fiber-modified indoor porous building materials: This part is the key component of building materials for absorbing indoor moisture. It has a fiber-modified layer and is located inside the porous structure building materials. Fibers with good hygroscopicity and stable moisture conductivity are selected and evenly embedded inside the porous building materials to form a fiber-modified layer that can significantly enhance the moisture absorption capacity of the porous building materials, so that water molecules actively enter the fiber gaps under the guidance of hydrophilicity, and the "capillary space" formed in the fiber gaps produces a differential capillary effect, realizing the lateral transmission of moisture inside the building materials.

[0041] ② Moisture-conducting material as a bridge: This part is the key component connecting the fiber-modified layer and the inside and outside of the wall. One part of the moisture-conducting fiber is connected to the porous structure building materials modified by the fiber inside the wall, and the other part passes through the wall and is connected to the external wall structure. Through the moisture-conducting properties of the fiber material and the gravity of water molecules, moisture is transferred from the porous structure building materials inside the wall to the external structure of the wall. And under the action of solar heat radiation, water molecules are promoted to desorb from the fiber material.

[0042] The key mechanisms used in the present invention are:

[0043] ① Capillary effect combined with water potential difference: The principle of this action is similar to the transpiration of plants, which uses capillary action to transfer water molecules from the roots to the leaves and finally evaporate into the air. The humidity pump uses the hydrophilicity of the fiber and the capillary structure formed by the fiber inside the porous building material, combined with the indoor and outdoor humidity difference (water potential difference), to guide the high-humidity water molecules indoors to the low-humidity environment outdoors. The essence of the capillary action in the capillary structure is that the adhesion force generated by the hydrogen bonds between the water molecules and the cellulose skeleton is greater than the cohesive force formed by the hydrogen bonds between the water molecules (such as Figure 1 The imbalance of force pulls the water molecules forward continuously, thus realizing the water transmission process in the building materials.

[0044] ② Solar radiation driven: The moisture transferred to the external structure of the wall through the moisture-conducting fibers, under the action of solar thermal radiation, the water molecules obtain enough energy to transform from liquid to gas and desorb from the external structure of the wall, realizing a continuous one-way dehumidification process.

[0045] The invention is particularly suitable for areas with distinct long-term hot and humid climate characteristics.

[0046] In hot and humid climates, the main energy consumption of solar-driven humidity pumps is used to handle the moisture load. The present invention provides a moisture-conducting channel for moisture transmission by adding moisture-conducting modified fibers into the gypsum board, realizes rapid and efficient moisture transmission against the concentration gradient, and strengthens the moisture absorption capacity of the gypsum board; the transmitted water is released in the form of water vapor under the irradiation of sunlight, greatly 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 dry climate with seasonal changes, the water vapor pressure difference between the indoor dry air and the developed gypsum building materials is greater than the affinity of LiCl inorganic salt for water molecules. The solar-driven humidity pump no longer absorbs indoor moisture, and the indoor relative humidity tends to stabilize.

[0048] In summary, through the implementation of the present invention, the purpose of improving indoor moisture comfort and building energy saving can be achieved in areas of southern my country with long-term high temperature and high humidity climate, and it has great promotion and application value.

[0049] Beneficial Effects

[0050] (1) The present invention mainly uses solar thermal radiation as the driving force for water evaporation, without the need to consume additional electricity or other traditional energy sources, thus reducing dependence on limited resources and promoting sustainable use of energy. Solar energy is a clean energy source, and no greenhouse gases or other pollutants are emitted during its use, which is beneficial to maintaining the ecological environment.

[0051] (2) The solar-driven humidity pump of the present invention transfers moisture to the external structure of the wall through moisture-conducting fibers, thereby 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 in design, does not rely on complex equipment or high technical requirements, and does not need to occupy additional indoor space resources, making it widely applicable in various building types and uses.

[0053] (4) The present invention has significant environmental benefits and potential economic benefits. The humidity pump uses solar energy as a driving force and does not need to rely on high-grade heat sources, which significantly reduces operating costs and greenhouse gas emissions, and is in line with the development trend of green and low carbon. The long-term and stable dehumidification effect reduces the corrosion of building materials and maintenance costs caused by humidity problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The schematic diagram of the principle of the solar-driven humidity pump of the present invention is shown in FIG.

[0055] 1: Inner wall; 2: Outer wall; 3: Solar radiation; 4: Gypsum matrix; 5: Moisture-conducting fiber fabric; 6: Fiber bundles; 7: Cellulose skeleton; 8: Water molecules; 9: Hydrogen bonds.

[0056] Figure 2 This is the experimental effect diagram of Example 1, which shows the moisture absorption performance of different types of modified fiber-composite gypsum boards in a sealed test box with a relative humidity greater than 90%; in the experiment, the four gypsum board materials are pure gypsum board, modified Coolpass-composite gypsum board, modified Modal-composite gypsum board and modified flax-composite gypsum board; by measuring the change in relative humidity in the test box within five hours, the relative moisture absorption capacity of different types of gypsum boards is reflected. In the figure, the black solid line represents the change in relative humidity (%) over time (h) in the test box of pure gypsum board, 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 flax-composite gypsum board;

[0057] Figure 3 The experimental results of Example 2 are shown in the upper figure, where the dehumidification effect of the control group on the humid air in the experimental box is shown in the lower figure, and the dehumidification effect of the experimental group on the humid air in the experimental box is shown in the figure. 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 introduction to this figure, see Example 2. DETAILED DESCRIPTION

[0058] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0059] In Example 1, three fiber materials with good moisture conductivity are hydrophilically modified and compounded into gypsum board. Through moisture absorption experiments, cool pass modified fiber-composite gypsum board with the best moisture absorption performance is selected. Then, the cool pass modified fiber selected in Example 1 is applied to Example 2. In Example 2, indoor and outdoor environmental conditions in humid and hot areas are created through experiments, and the feasibility of the humidity pump system prepared by cool pass modified fiber-composite gypsum board, which can adsorb indoor moisture and transfer it to the outdoors for desorption, is verified.

[0060] Example 1

[0061] The composite gypsum board structure of this embodiment includes: a first gypsum board layer, a modified fiber layer and a second gypsum board layer, wherein the modified fiber layer is arranged between the first and second gypsum board layers; the modified fiber layer is arranged at one-third of the composite gypsum board, and the modified fiber layer is composed of modified fiber and gypsum, wherein the modified fiber in the modified fiber layer is 0.5% of the mass of the gypsum powder of the layer; wherein the preparation method of the modified fiber is to immerse the fiber in a LiCl solution with a mass percentage concentration of 40% to obtain LiCl modified fiber. The loading amount of LiCl in the modified fiber is 20%wt, and the modified fiber is selected from LiCl modified Coolpass, LiCl modified flax, and LiCl modified Modal.

[0062] This embodiment mainly optimizes the fiber-composite gypsum board, and the materials involved include three pieces of pure gypsum board, modified Coolpass-composite gypsum board, modified flax-composite gypsum board, and modified Modal-composite gypsum board with dimensions of 100mm×100mm×20mm in length, width and height.

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

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

[0065] (2) injecting 1 / 3 of the above gypsum slurry into a 100 mm × 100 mm × 20 mm mold, laying the modified fiber fabric, and then slowly injecting the remaining 2 / 3 of the gypsum slurry;

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

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

[0068] In this example, four different types of gypsum boards are placed in a sealed test box with a relative humidity greater than 90%, and the relative moisture absorption capacity of different types of gypsum boards is reflected by measuring the change in relative humidity in the test box over a period of five hours. Figure 2 As shown, it can be clearly observed from the picture that the relative humidity curve corresponding to the modified Coolpass-composite gypsum board decreases fastest and to the most obvious extent, indicating that the moisture absorption capacity of the modified Coolpass-composite gypsum board is relatively the best, verifying that the fiber selected in the present invention has the best moisture absorption.

[0069] Example 2

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

[0071] The structure of the first adsorption plate and the second adsorption plate is as follows: the bridge moisture-conducting material is embedded in the first adsorption plate and the second adsorption plate. The sample preparation process of the humidity pump is as follows:

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

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

[0074] (3) injecting 1 / 2 of the gypsum slurry into a 100 mm×100 mm×5 mm mold, laying the modified fiber fabric, and then slowly injecting the remaining 1 / 2 of the gypsum slurry to obtain a second adsorption plate, wherein the modified fibers between the first and second adsorption plates are continuous;

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

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

[0077] That is, after the sample reaches a stable state, the next experiment can be carried out.

[0078] The preparation method of 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, and the loading amount of LiCl in the modified cool pass fiber is 20%wt.

[0079] The bridge moisture conducting material is a LiCl-modified cool pass fiber fabric, through which moisture is transported from indoor to outdoor.

[0080] This embodiment is based on Figure 1 As shown in the figure, the indoor and outdoor environment simulated by this embodiment is achieved by the humidity pump to transfer moisture from indoor adsorption to outdoor desorption.

[0081] The embodiment is divided into an experimental group and a control group.

[0082] The specific setting conditions of the experimental group are as follows: the first adsorption plate is placed in a sealed experimental box with an internal moisture source, which simulates the indoor environment (26°C) and controls the humidity to cycle between 75-90% RH (moisture content 15.88-19.15 g / kg); the second adsorption plate is placed in a sealed experimental box with a heat source and a moisture source, which simulates the high temperature and high humidity outdoor environment (temperature 35°C, relative humidity ~65% RH, moisture content ~23.29 g / kg), wherein the temperature of the second adsorption plate is about 50°C (simulating the plate temperature under solar radiation), and the moisture-conducting fiber serves as a bridge connecting the indoor and outdoor sides to ensure the continuity of the system.

[0083] The specific setting conditions of the control group are as follows: the only difference from the experimental group is that the second adsorption plate is omitted (the second adsorption plate is not set), and the rest are the same as the experimental group.

[0084] Experimental data is shown in Figure Figure 3 As shown, the humidity pump system of the experimental group can achieve continuous humidity pumping from indoor to outdoor compared with the control group; the control group only absorbs moisture on the indoor side. As time goes by, the moisture absorption rate of the control group decreases significantly, which confirms the feasibility and effectiveness of solar-driven humidity pumps.

[0085] Specific application method of the present invention:

[0086] (1) Select a solar-driven humidity pump of appropriate thickness according to the wall thickness of the application area;

[0087] (2) Select a suitable location on a wall connected to the outdoors to embed the solar-driven humidity pump obtained by the present invention;

[0088] (3) Apply latex paint according to standard wall painting techniques.

[0089] After testing, it was found that laying the solar-driven humidity pump of the present invention can effectively and continuously reduce the relative humidity of indoor air, reducing the use of dehumidifiers, air conditioners and other equipment. At the same time, the humidity pump can circulate moisture absorption and moisture conduction for a long time, reducing the consumption of manpower, material resources and energy.

Claims

1. A solar-driven humidity pump, characterized in that: The solar-driven humidity pump comprises a first adsorption plate, a second adsorption plate, and a bridge moisture-conducting material; wherein the first adsorption plate and the second adsorption plate are connected by the bridge moisture-conducting material.

2. The solar-driven humidity pump according to claim 1, characterized in that: The first adsorption plate is attached indoors, the second adsorption plate is attached outdoors, and the first adsorption plate and the second adsorption plate are connected by a bridge moisture-conducting material, wherein the first adsorption plate adsorbs moisture from the indoor air and transfers it to the bridge moisture-conducting material through capillary action, and under the action of gravity, the moisture is transferred along the bridge moisture-conducting material to the second adsorption plate on the outer wall, and finally the solar radiation heat drives the moisture to desorb to the external environment.

3. The solar-driven humidity pump according to claim 1, characterized in that: The first adsorption plate and the second adsorption plate structure both include a first substrate layer, an inorganic salt-modified moisture-conducting material layer, and a second substrate layer, wherein the inorganic salt-modified moisture-conducting material layer is disposed between the first and second substrate layers; The inorganic salt-modified moisture-conducting material layer includes an inorganic salt-modified moisture-conducting material.

4. The solar-driven humidity pump according to claim 3, characterized in that: A moisture-conducting material layer containing inorganic salt modification is provided at 1 / 2 to 1 / 4 of the first adsorption plate and the second adsorption plate; The inorganic salt-modified moisture-conducting material in the inorganic salt-modified moisture-conducting material layer is in a network structure; The substrates in the first adsorption plate and the second adsorption plate are porous structures.

5. The solar-driven humidity pump according to claim 3, characterized in that: The inorganic salt in the inorganic salt-modified moisture-conducting material includes a lithium salt, and the moisture-conducting material includes a fiber or a textile; wherein the fiber includes one or more of coolpass fiber, modal fiber, and flax fiber; the textile includes one or more of coolpass fiber, modal fiber, and flax fiber; The substrate comprises a porous medium material; wherein the porous medium material comprises at least one of gypsum and diatom mud; The inorganic salt modified moisture conductive material layer comprises an inorganic salt modified moisture conductive material and a substrate, wherein the inorganic salt modified moisture conductive material in the inorganic salt modified moisture conductive material layer accounts for 0.5-4% of the mass of the substrate.

6. The solar-driven humidity pump according to claim 1, characterized in that: The bridge moisture-conducting material is one of an unmodified moisture-conducting material and an inorganic salt-modified moisture-conducting material.

7. The solar-driven humidity pump according to claim 6, characterized in that: The inorganic salt in the inorganic salt-modified moisture-conducting material includes lithium salt; the moisture-conducting material includes fiber or textile; wherein the fiber includes one or more of coolpass fiber, modal fiber, and flax fiber; the textile includes one or more of coolpass fiber, modal fiber, and flax fiber.

8. A method for preparing a solar-driven humidity pump, comprising method 1 or method 2: Method 1: Immersing the moisture-conducting material in a lithium salt solution to obtain a lithium salt-modified moisture-conducting material; Adding a first part of the base slurry into the mold, then adding a second part of the base slurry containing the moisture-conducting material modified by the lithium salt, and then adding a third part of the base slurry, curing, drying, and demolding to obtain a first adsorption plate; using this method to prepare a second adsorption plate; The bridge moisture-conducting fiber is an extension material of the moisture-conducting material modified with lithium salt, and a solar-driven humidity pump is obtained; or the bridge moisture-conducting material and the first adsorption plate and the second adsorption plate are assembled to obtain a solar-driven humidity pump; Method 2: During the preparation of the first and second adsorption plates, the lithium salt-modified moisture-conducting material is directly cast, and the bridge moisture-conducting fiber is an extended material containing the lithium salt-modified moisture-conducting material to obtain a solar-driven humidity pump, or the bridge moisture-conducting material and the first adsorption plate and the second adsorption plate are assembled to obtain a solar-driven humidity pump.

9. Use of the solar-driven humidity pump according to claim 1 as a dehumidification device.

10. Use of the solar-driven humidity pump according to claim 1 in hot and humid climates.

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