Continuous solar drying system based on adsorption heat storage technology

Abstract

The invention discloses a continuous solar drying system based on an adsorption heat storage technology. The continuous solar drying system comprises a solar drying subsystem, an adsorption heat storage subsystem and a control subsystem. The solar drying subsystem is composed of a solar vacuum tube air heat collector, a drying box, a tray with holes, a centrifugal blower and a rainproof cap. The adsorption heat storage subsystem is composed of an adsorption box, a pipeline fan, an air fairing, an adsorption material, an adsorption bed, a rectangular mold and a small support. The control subsystem is composed of a control cabinet, an electromagnetic valve, a temperature and humidity controller, a temperature and humidity sensor and a pipeline and used for connecting, monitoring and controlling the sun drying subsystem and the adsorption heat storage subsystem. The adsorption heat storage technology and the solar energy drying technology are combined, aiming at different weather conditions, the contradiction between the drying continuity requirement and the solar energy intermittency can be effectively relieved by controlling the electromagnetic valve to be opened and closed and switching different operation modes, the drying efficiency is improved, the drying time is shortened, and continuous operation of the solar energy drying process is achieved.

Description

Technical Field

[0001] The design of the present invention relates to the technical field of solar drying, and particularly relates to a continuous solar drying system integrating adsorption dehumidification and heat storage. Background Art

[0002] Drying is closely related to human survival activities and is a key step in the processing of agricultural products, which can ensure product quality, extend the shelf life of products, and reduce packaging and transportation costs. Solar drying technology directly or indirectly uses solar energy as a heat source to remove moisture from materials, with good environmental protection and energy-saving advantages. The entire drying process has intensive energy requirements and large consumption, which conflicts with the intermittent, unstable, and small radiation energy per unit area of solar energy, making it difficult to be efficiently utilized. Therefore, scholars from various countries are committed to researching various types of solar drying systems and using solar air collectors to improve the utilization rate of solar energy, so that the heating temperature is basically consistent with the medium and low temperature drying temperature required for agricultural products. However, there are still the following two problems: (1) During the drying process, when facing rainy days or nights, the drying is forced to stop, and continuous drying cannot be achieved, resulting in a longer drying cycle; (2) In the case of terminating drying due to weather factors, the air temperature in the drying chamber decreases and the relative humidity increases, which easily leads to dew condensation on the surface of the material and moisture return phenomenon, thereby reducing the quality of the dried material. To sum up, to ensure the continuous operation of the solar drying process and the improvement of the quality of the dried material products, the key lies in solving the problems of discontinuous nighttime energy supply and humidity control.

[0003] Conventional heat storage systems are difficult to take into account the above two key problems - dehumidification and heat supply. The core of the adsorption heat storage technology is to release heat during the adsorption dehumidification process, which can simultaneously meet the dehumidification and heat supply requirements of the solar drying system on rainy days or nights. During the day, solar energy is used to regenerate and store heat in the adsorption material, and the drying process is maintained continuously on rainy days or nights, realizing continuous drying completely powered by solar energy. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a continuous solar drying system based on adsorption heat storage technology. This system can store the abundant solar radiation energy during the day using adsorption materials, adsorb water vapor in the drying chamber and release heat during nighttime and rainy and low-temperature weather drying operations, realizing the continuous, efficient, and stable operation of the solar drying system, and effectively alleviating the contradiction between drying continuity and solar intermittency.

[0005] The present invention is realized through the following technical solutions: A continuous solar drying system based on adsorption heat storage technology, comprising a solar drying subsystem, an adsorption heat storage subsystem, and a control subsystem; The solar drying subsystem consists of a solar vacuum tube air collector, a drying chamber, a perforated tray, a centrifugal blower, and a rain cap; The adsorption heat storage subsystem consists of an adsorption box, a duct fan, an air fairing, an adsorption material, an adsorption bed, a rectangular mold, and a small bracket; The control subsystem consists of a control cabinet, a solenoid valve, a temperature and humidity controller, a temperature and humidity sensor, and a pipeline, and is used to connect, monitor, and control the solar drying subsystem and the adsorption heat storage subsystem.

[0006] A centrifugal blower is installed at the air inlet of the solar vacuum tube air collector. The drying chamber is connected to the adsorption box through a pipeline. Four layers of perforated trays are horizontally arranged inside the drying chamber. The top and bottom of the drying chamber are connected to the adsorption box through pipelines. The adsorption box is placed on a small bracket. The rain cap is placed on the air outlet pipelines at the tops of the drying chamber and the adsorption box. The adsorption material is placed in the adsorption bed. The adsorption beds are stacked in the adsorption box. The air fairings are placed at the top and bottom of the adsorption box. The first duct fan and the second duct fan are designed in a positive and negative manner and are respectively arranged at the inlet and outlet inside the adsorption box. The control cabinet is placed between the drying chamber and the adsorption box. The temperature and humidity controller is set inside the control cabinet. Multiple solenoid valves are set on the pipeline.

[0007] The matrix of the adsorption material is activated carbon fiber prepared from agricultural and forestry waste, which has a high specific surface area and a rich pore structure, can accelerate the adsorption of water vapor, and improve the heat storage capacity.

[0008] The drying chamber and the adsorption box are boxes made of stainless steel metal plates filled with heat insulation materials. The inner and outer surfaces of the boxes are welded tightly, which can reduce the heat loss inside the boxes. The connecting pipelines between the boxes are stainless steel pipelines, and the surfaces are wrapped with heat insulation cotton.

[0009] In the solar drying subsystem, the centrifugal blower sends ambient air into the solar vacuum tube air collector to be heated to form hot air. The hot air enters the drying chamber or the adsorption box for drying materials or regenerating the adsorption material.

[0010] The air fairing is connected to the adsorption bed. The adsorption material is placed in the adsorption bed. The adsorption material is solidified and dried and shaped through a rectangular mold, presenting a rectangular wave honeycomb structure.

[0011] Solenoid valves are set at the inlets and outlets of the drying chamber and the adsorption box. The temperature and humidity controller controls the opening and closing of the solenoid valves according to the feedback results of the temperature and humidity sensor. When the relative humidity difference of the air at the inlet and outlet of the adsorption box is small, it is regarded that the desorption of the adsorption material is completed, and the temperature and humidity controller will close the solenoid valves at the inlet and outlet of the adsorption box.

[0012] Compared with the prior art, the advantages of the present invention are: ① This system integrates dehumidification and heat supply by using adsorption energy storage technology. It collects and stores abundant solar energy during the day and releases it as needed to achieve a balance between supply and demand, effectively solving the problems of instability and discontinuity of solar energy during the drying process. ② The adsorption material used in this system is a porous carbon material, which can be fully prepared from local agricultural and forestry waste. The activated carbon fiber prepared in this way has good adsorption and heat storage performance, low regeneration temperature, and strong cycle stability.

[0013] ③ This system is equipped with a control module, which can automatically adjust the opening and closing of valves according to weather conditions. During the day, material drying and desorption heat storage of the adsorption material are carried out simultaneously. At night, water vapor is adsorbed and heat is released to maintain the continuity of the drying process, thereby shortening the drying time, improving the drying efficiency, and obtaining high-quality dried materials.

[0014] ④ The adsorption bed designed in this system has the characteristics of modularization and expansion. The adsorption material is solidified and shaped into a rectangular wave honeycomb structure through a rectangular mold, and after being combined and stacked, it is placed in the adsorption bed. The material filling amount can be flexibly adjusted according to usage requirements, while avoiding the collapse of the adsorption bed structure during the adsorption process and reducing the dehumidification and heat supply effects.

[0015] ⑤ The pipeline fans in this system are designed in a one positive and one reverse manner, which can control the flow direction of the wet air inside the drying box at night, enhance the adsorption heat release process between the air and the material, and avoid the problem of uneven adsorption amounts on both sides of the stacked adsorption beds. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is a schematic structural diagram of the combination and superposition of a rectangular mold, an adsorption bed, and an adsorption material in an embodiment of the present invention; Figure 3 is a schematic internal structure diagram of the adsorption box in an embodiment of the present invention.

[0017] The meanings of the reference numerals in the drawings: 1, centrifugal blower; 2, solar vacuum tube air collector; 3, first solenoid valve; 4, second solenoid valve; 5, third solenoid valve; 6, fourth solenoid valve; 7, fifth solenoid valve; 8, sixth solenoid valve; 9, pipeline; 10, drying box; 11, perforated tray; 12, adsorption box; 13, adsorption bed; 14, first pipeline fan; 15, second pipeline fan; 16, air fairing; 17, rain cap; 18, small bracket; 19, control cabinet; 20, temperature and humidity controller; 21, temperature and humidity sensor; 22, rectangular mold; 23, adsorption material. Detailed Embodiment

[0018] The following further elaborates in detail the content of the present invention in conjunction with the drawings and specific embodiments.

[0019] As shown Figure 1 in the figure, a continuous solar drying system based on adsorption heat storage technology mainly includes a centrifugal blower 1, a solar vacuum tube air collector 2, a drying box 10, an adsorption box 12, and an adsorption bed 13; the centrifugal blower 1 is arranged at the inlet of the solar vacuum tube air collector 2, a perforated tray 11 is arranged in the drying box 10, an adsorption bed 13 and an air fairing 16 are arranged in the adsorption box 12, a rectangular wave honeycomb structure adsorption material 23 is arranged in the adsorption bed 13, a first duct fan 14 and a second duct fan 15 are arranged in the air fairing 16, and a temperature and humidity controller 20 is arranged in the control cabinet 19, and the temperature and humidity controller 20 is connected to a temperature and humidity sensor 21.

[0020] Among them, the solar vacuum tube air collector 2 is connected to the drying box 10 and the adsorption box 12 respectively through a pipeline 9, and the drying process and the regeneration process are respectively controlled by a first solenoid valve 3 and a second solenoid valve 4; the drying box 10 and the adsorption box 12 are connected through a pipeline 9, and the circulating dehumidification and heat supply processes are controlled by a third solenoid valve 5 and a fifth solenoid valve 7; a sixth solenoid valve 8 and a fourth solenoid valve 6 are respectively arranged at the outlets of the drying box 10 and the adsorption box 12, and a rain cap 17 is arranged above the outlets; a small bracket 18 is arranged at the bottom of the adsorption box 12 to support the air inlet at the bottom of the adsorption box; all pipelines 9 are wrapped with heat insulation cotton, which can reduce the heat loss of the drying system.

[0021] The adsorption material 23 is a porous carbon material prepared from a carbon-rich organic material. The organic material can use agricultural and forestry waste as raw materials. The activated carbon fiber prepared therefrom has a high specific surface area and a rich pore structure, which can accelerate the adsorption of water vapor and release adsorption heat.

[0022] The embodiment of the present invention discloses a continuous solar drying system based on adsorption heat storage technology, which uses the adsorption material 23 to assist solar drying. The opening and closing of the solenoid valve are controlled according to weather conditions to switch the drying mode, so as to realize a continuous drying process, overcome the shortcomings of solar intermittency and instability, effectively shorten the drying time, and improve the drying efficiency.

[0023] In this embodiment, the activated carbon fiber is compounded with a gel to prepare the adsorption material 23, which is shaped into a rectangular wave honeycomb structure through a rectangular mold 22, and is placed in the adsorption bed 13 in a honeycomb shape after being combined and stacked, forming a honeycomb channel convenient for air to pass through, realizing full contact between air and the adsorption material, and improving the adsorption and regeneration efficiency of the adsorption heat storage subsystem.

[0024] On the basis of the above embodiments, a specific embodiment is selected. The gel is formed by crosslinking sodium alginate solution and calcium chloride solution, where the mass concentration of the sodium alginate solution is 1% and the mass concentration of the calcium chloride solution is 1%. Preparation steps: The activated carbon fiber is fully immersed in the sodium alginate solution for 6 h. After immersion, the activated carbon fiber is fixed on the rectangular mold 22 to form a rectangular wave structure, and the calcium chloride solution is sprayed. After the reaction ends, it is dried and formed to obtain an adsorption material 23 with a rectangular wave honeycomb structure. By repeating the preparation steps, multiple layers of adsorption materials can be obtained.

[0025] As an improvement of the above technical solution, a thermo-hygrostat is used to detect the adsorption performance of the adsorption material.

[0026] As an improvement of the above technical solution, a differential scanning calorimeter is used to detect the heat storage performance of the adsorption material.

[0027] As an improvement of the above technical solution, a fully automatic specific surface area and porosity analyzer is used to detect the pore structure of the adsorption material.

[0028] As an improvement of the above technical solution, a thermogravimetric analyzer is used to detect the thermal stability of the adsorption material.

[0029] As an improvement of the above technical solution, a thermogravimetric analyzer and a steam generator are used to detect the adsorption / desorption cycle stability of the adsorption material, and the number of cycles is 11 times.

[0030] Specifically, the adsorption material reaches the adsorption equilibrium state at 20 °C under the conditions of 70%, 80% and 90% relative humidity, and the adsorption amounts are 0.45 g / g, 0.47 g / g and 0.49 g / g respectively. Subsequently, the heat storage density measured by desorption is 640.7 J / g, 669.7 J / g and 696.3 J / g respectively; the specific surface area of the adsorption material is 1312 m 2 / g, and the total pore volume and micropore volume are 0.688 cm 3 / g and 0.470 cm 3 / g respectively; the mass loss ratio of the adsorption material is 5.78% below 100 °C, all of which is water evaporation; the adsorption amount fluctuates by 0.002 g / g after 11 cycles of adsorption / desorption of the adsorption material.

[0031] Specifically, the rectangular wave honeycomb structure has modularity and expandability, and the filling amount of the adsorption material can be independently increased / reduced according to the use requirements without changing the structure of the adsorption bed. The rectangular pores in the adsorption bed can ensure that the adsorption material is fully adsorbed and regenerated. The adsorption material has good cycle stability and can be reused.

[0032] Specifically, the top of the adsorption bed is not capped, and the bottom has a mesh structure, allowing air to pass through the adsorption material in the rectangular corrugated honeycomb structure along the mesh holes.

[0033] Specifically, one end of the air fairing is a round opening, which is connected to the pipeline; the other end is a square opening, which is connected to the adsorption bed, which can improve the uniformity of air flow.

[0034] Specifically, a temperature and humidity sensor is provided outside the drying box to collect ambient temperature and humidity data and judge the weather conditions; temperature and humidity sensors are provided at the inlets and outlets of the drying box and the adsorption box to collect the temperature and humidity data inside the system and switch the drying mode.

[0035] Specifically, the internal structure of the adsorption box from top to bottom is the air fairing 16, the second pipeline fan 15, the adsorption bed 13, the adsorption bed 13, the adsorption bed 13, the first pipeline fan 14, and the air fairing 16, and the connection between each component is tight.

[0036] Specifically, the temperature and humidity controller controls the opening and closing of the solenoid valve through the data fed back by the temperature and humidity sensor to switch the drying mode of the system operation. In the single solar drying mode, the second solenoid valve 4 and the sixth solenoid valve 8 are opened, and the rest of the valves are closed; in the synchronous drying and regeneration mode, the first solenoid valve 3, the second solenoid valve 4, the fourth solenoid valve 6, and the sixth solenoid valve 8 are opened, and the rest of the valves are closed; in the dehumidification and heat supply internal circulation mode, the third solenoid valve 5 and the fifth solenoid valve 7 are opened, and the rest of the valves are closed.

[0037] Specifically, a rain cap 17 is provided above the outlets of the drying box 10 and the adsorption box 12, which can avoid the influence of rainy weather on the drying process.

[0038] The working process of this embodiment is as follows: Place the material to be dried on the perforated tray in the drying oven. When the solar irradiance is strong during the day, operate in the synchronous drying and regeneration mode. Open the first solenoid valve 3, the second solenoid valve 4, the fourth solenoid valve 6, and the sixth solenoid valve 8. Driven by the centrifugal blower, the ambient air passes through the solar vacuum tube collector 2. Part of the hot air enters the drying oven 10, and the other part enters the adsorption box 12, simultaneously drying the material and regenerating the adsorption material. When the relative humidity difference between the inlet and outlet of the adsorption box collected by the temperature and humidity sensor is less than the set value, it is considered that the regeneration of the adsorption material is completed. The temperature and humidity controller closes the first solenoid valve 3 and the fourth solenoid valve 6 to enter the single solar drying mode, and all the hot air from the solar vacuum tube air collector enters the drying oven. When the sun goes down and the temperature and humidity sensor detects that the temperature at the inlet of the drying oven is low, the temperature and humidity controller closes the second solenoid valve 4 and the sixth solenoid valve 8, and the residual heat in the drying oven continues to dry the material. At night, as the temperature of the drying oven decreases due to heat loss and the relative humidity increases, when the temperature and humidity sensor determines that the relative humidity reaches the set value, open the third solenoid valve 5 and the fifth solenoid valve 7 on the connecting pipeline between the drying oven 10 and the adsorption box 12, supply power to the first pipeline fan 14, and forcibly drive the air in the drying oven to circulate through the adsorption box. The water vapor in the drying oven 10 combines with the adsorption material, the temperature of the drying oven increases, and the relative humidity decreases, and the material continues to be dried. When half of the night drying time has passed and the adsorption material in the lower adsorption bed of the adsorption box is basically saturated with adsorption, stop supplying power to the first pipeline fan 14 and switch to supplying power to the second pipeline fan 15 to ensure that all the adsorption materials are evenly adsorbed, making the best use of the adsorption heat storage subsystem.

[0039] During the above operations, when it rains during the day and the temperature and humidity sensor outside the drying oven detects that the ambient relative humidity is higher than the set value, automatically switch to the dehumidification and heat supply internal circulation mode, and the adsorption material dehumidifies and supplies heat to the air in the drying oven. At the same time, due to the water vapor partial pressure difference between the material and the air, the moisture in the material will continuously be discharged into the air in the drying oven, providing sufficient water vapor for the adsorption material. The heat storage performance results of the adsorption material show that the more water vapor is adsorbed, the greater the heat storage density and the more heat is released.

[0040] During the above operations, after rain or at night, when the temperature and humidity sensor outside the drying oven detects that the ambient temperature is higher than the set value, close the dehumidification and heat supply internal circulation mode and enter the synchronous drying and regeneration mode, repeating the daytime working steps of the above embodiment.

[0041] During the above operations, when the relative humidity difference between the inlet and outlet of the drying oven collected by the temperature and humidity sensor is less than the set value, it indicates that the material has completed the drying of this batch, and the next batch of materials can be put in for continuous drying, realizing the continuity of the drying process.

[0042] During the above operations, 10 kg of dry materials are placed in the drying oven in a single batch, and the dehumidification and heat supply internal circulation mode is operated at night without solar energy. The temperature in the drying oven rises by 1.95 °C to 5.76 °C, and the relative humidity decreases by 36.35% to 48.37%. The drying time is shortened by 24 h, and the weight of the materials is reduced by 2.64 kg, effectively overcoming the problem that the materials are prone to rehydration and moisture absorption in a high-humidity environment due to no energy input at night.

[0043] The above detailed description is a specific description of the feasible embodiments of the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

Claims

1. A continuous solar drying system based on adsorption heat storage technology, characterized in that: It includes a solar drying subsystem, an adsorption heat storage subsystem and a control subsystem; the solar drying subsystem is connected to the adsorption heat storage subsystem through the control subsystem; the solar drying subsystem consists of a solar vacuum tube air collector (2), a drying box (10), a perforated tray (11), a centrifugal blower (1) and a rain cap (17); the adsorption heat storage subsystem consists of an adsorption box (12), a duct fan (14), an air fairing (16), an adsorption material (23), an adsorption bed (13), a rectangular mold (22) and a small bracket (18); the control subsystem consists of a control cabinet (19), a solenoid valve (3), a temperature and humidity controller (20), a temperature and humidity sensor (21) and a duct (9); a centrifugal blower (1) is installed at the air inlet of the solar vacuum tube air collector (2), four layers of perforated trays (11) are horizontally arranged inside the drying box (10), the top and bottom of the drying box (10) are connected to the adsorption box (12) through a duct (9), the adsorption box (12) is placed on the small bracket (18), the rain cap (17) is placed on the air outlet ducts at the tops of the drying box and the adsorption box, the adsorption material (23) is placed in the adsorption bed (13), the adsorption bed (13) is placed in the adsorption box (12), the air fairing (16) is placed at the top and bottom of the adsorption box, the first duct fan (14) and the second duct fan (15) are respectively arranged at the inlet and outlet inside the adsorption box, the control cabinet (19) is installed between the drying box (10) and the adsorption box (12), the temperature and humidity controller (20) is arranged inside the control cabinet, and multiple solenoid valves are arranged on the duct.

2. The continuous solar drying system based on the adsorption heat storage technology according to claim 1, wherein: The box bodies of the drying box (10) and the adsorption box (12) are made of stainless steel metal plates filled with heat insulation materials, and the outer surfaces of the box bodies are welded tightly; the duct is made of stainless steel and is wrapped with heat insulation cotton on the surface.

3. The continuous solar drying system based on the adsorption heat storage technology according to claim 1, wherein: In the solar drying subsystem, the centrifugal blower (1) sends ambient air into the solar vacuum tube air collector (2) for heating, and the formed hot air can enter the drying box alone through the solenoid valve or enter the drying box (10) and the adsorption box (12) simultaneously.

4. The continuous solar drying system based on the adsorption heat storage technology according to claim 1, wherein: The air fairing (16) is tightly connected to the adsorption bed (13), the adsorption material (23) loaded in the adsorption bed is in a rectangular wave honeycomb structure, and the adsorption material is solidified by a rectangular mold and then dried and shaped. The hot air enters the adsorption box (12), passes through the three-layer adsorption bed in turn after passing through the air fairing, and realizes the regeneration of the adsorption material.

5. The continuous solar drying system based on the adsorption heat storage technology according to claim 1, wherein: Temperature and humidity sensors (21) are provided at the inlets and outlets of the drying box (10) and the adsorption box (12), a third solenoid valve (5) and a fifth solenoid valve (7) are provided on the connecting pipeline between the drying box and the adsorption box, and the temperature and humidity controller (20) controls the opening and closing of the solenoid valve according to the feedback results of the temperature and humidity sensors to realize the switching of different modes under multiple weather conditions.

6. The continuous solar drying system based on the adsorption heat storage technology according to claim 6, wherein: The control subsystem controls the opening and closing of the solenoid valves according to weather conditions to switch the drying mode and achieve a continuous drying process, with synchronous drying and regeneration modes, dehumidification and heat supply internal circulation modes, and a separate solar drying mode.

7. Synchronous drying and regeneration mode: On sunny days, the temperature in the drying chamber is high and the relative humidity is low. The temperature and humidity sensors collect data and feedback it to the temperature and humidity controller. The temperature and humidity controller outputs a signal to control the opening of the solenoid valves at the inlets and outlets of the drying chamber and the adsorption chamber, and the rest of the solenoid valves are closed. At this time, the hot air from the outlet of the solar vacuum tube air collector enters the drying chamber and the adsorption chamber simultaneously.

8. Dehumidification and heat supply internal circulation mode: On rainy days or at night, the temperature in the drying chamber is low and the relative humidity is high. The temperature and humidity sensors collect data and feedback it to the temperature and humidity controller. The temperature and humidity controller outputs a signal to control the opening of the solenoid valve in the connecting pipe between the drying chamber and the adsorption chamber, and the rest of the solenoid valves are closed. At this time, the wet and cold air inside the drying chamber enters the adsorption chamber, and after being dehumidified and heated by the adsorption material, it returns to the drying chamber.

9. Separate solar drying mode: On cloudy or overcast days, the temperature in the drying chamber is relatively low and the relative humidity is relatively high. The temperature and humidity sensors collect data and feedback it to the temperature and humidity controller. The temperature and humidity controller outputs a signal to control the opening of the solenoid valves at the inlets and outlets of the drying chamber, and the rest of the solenoid valves are closed. At this time, all the hot air from the solar vacuum tube air collector enters the drying chamber.

10. The continuous solar drying system based on the adsorption heat storage technology according to claim 6, wherein: In the synchronous drying and regeneration mode, when the air states at the inlets and outlets of the adsorption chamber collected by the temperature and humidity sensor (21) are found to have little difference, it is regarded that the regeneration of the adsorption material is completed. The temperature and humidity sensor collects data and feedbacks it to the temperature and humidity controller (20). The temperature and humidity controller outputs a signal to control the closing of the first solenoid valve (3) and the fourth solenoid valve (6) at the inlets and outlets of the adsorption chamber (12), and switches to the separate solar drying mode.

11. The continuous solar drying system based on the adsorption heat storage technology according to claim 7, wherein: The temperature and humidity sensor (21) collects the temperature and humidity data of the drying chamber, the adsorption chamber and the ambient air, and controls the opening and closing of the solenoid valves through the temperature and humidity controller (20) to automatically switch the drying mode, ensuring the continuity of drying under different weather conditions.

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