A dehumidification system

Abstract

The utility model discloses a kind of dehumidification systems, it is related to lithium battery industry dehumidification equipment technical field.Specifically include: evaporator, be in first air duct;Compressor, connect in the evaporator;First condenser, connect in the compressor, the first condenser is located in the first air duct;Second condenser, connect in the first condenser, for receiving refrigerant in first condenser, and through throttling valve and the evaporator communication, realize refrigerant circulation;And rotary dehumidification module, the first part of rotary dehumidification module is located in first air duct, and be located between evaporator and first condenser, the second part of rotary dehumidification module is located in second air duct, the second condenser is located in second air duct and is located rotary dehumidification module second part air inlet front end.It aims at reducing its energy consumption while guaranteeing that existing rotary dehumidification system has high-efficiency dehumidification performance.

Description

Technical Field

[0001] This utility model relates to the technical field of dehumidification equipment in the lithium battery industry, and in particular to a dehumidification system. Background Technology

[0002] With the rapid development of industries such as new energy vehicles, energy storage systems, and consumer electronics, lithium-ion batteries, as their core power and energy storage units, face increasingly stringent requirements for manufacturing technology and process environments. Particularly during lithium battery production, humidity control in the air environment has a crucial impact on product performance, safety, and yield. Because key battery materials such as electrolytes and negative electrode materials are extremely sensitive to moisture, they are prone to chemical reactions in humid environments, leading to performance degradation or even irreversible damage. Therefore, controlling the humidity content of the air in the production environment is a critical aspect of lithium battery production.

[0003] Currently, rotary dehumidification (also known as rotary dehumidifier or rotary dehumidifier machine) is widely used in lithium battery drying workshops as a highly efficient, continuous, and stable dehumidification technology. Its principle is as follows: a rotary wheel containing highly absorbent materials (such as silica gel or molecular sieves) adsorbs moisture as air passes through it. The wheel is then regenerated and dehumidified in a high-temperature hot air regeneration zone, ensuring continuous moisture absorption and thus effectively controlling air humidity. Rotary dehumidification systems offer significant advantages such as high dehumidification efficiency, stable operation, and suitability for low-humidity environments, making them particularly suitable for lithium battery manufacturing processes with stringent humidity control requirements.

[0004] However, rotary dehumidification systems have significant energy consumption issues. To maintain the continuous and effective operation of the dehumidification rotor, it needs to undergo periodic high-temperature regeneration, typically between 120 and 160°C, and even higher in some high-performance systems. The regeneration heating process consumes a large amount of thermal energy, making it the most energy-intensive part of the system, especially in 24-hour continuous production environments where prolonged high-temperature heating significantly increases operating costs. Furthermore, because the regenerated air needs to reach a relatively high temperature, higher demands are placed on the stability, response speed, and safety of the heating equipment. Improper control can lead to problems such as localized overheating, equipment aging, and wasted thermal energy, further reducing the overall energy efficiency ratio of the system.

[0005] Therefore, how to reduce energy consumption while ensuring the high dehumidification performance of existing rotary dehumidification systems has become an urgent technical challenge. Utility Model Content

[0006] The main purpose of this invention is to provide a dehumidification system that aims to reduce energy consumption while ensuring the high dehumidification performance of existing rotary dehumidification systems.

[0007] To achieve the above objectives, this utility model proposes a dehumidification system, comprising:

[0008] The evaporator, located in the first air duct, condenses and cools the airflow in the air duct by evaporating the refrigerant inside the evaporator, thereby reducing the moisture content of the airflow.

[0009] A compressor, connected to the evaporator, is used to compress the refrigerant output from the evaporator into liquid refrigerant;

[0010] The first condenser is connected to the compressor and is located in the first air duct. It is used to heat the airflow after passing through the evaporator.

[0011] A second condenser, connected to the first condenser, is used to receive refrigerant from the first condenser and is connected to the evaporator via a throttling valve to achieve refrigerant circulation; and

[0012] The rotary dehumidification module has a first part located in the first air duct and between the evaporator and the first condenser, and a second part located in the second air duct. The second condenser is located in the second air duct and at the front end of the air inlet of the second part of the rotary dehumidification module.

[0013] In one embodiment of this application, a positive pressure fan is provided in the first air duct, and the positive pressure fan is located between the evaporator and the first part of the rotary dehumidification module.

[0014] In one embodiment of this application, a medium-efficiency filter is further provided in the first air duct, and the medium-efficiency filter is located between the positive pressure fan and the first part of the rotary dehumidification module.

[0015] In one embodiment of this application, a first surface cooler is further provided in the first air duct, and the first surface cooler is located between the first part of the rotary dehumidification module and the first condenser.

[0016] In one embodiment of this application, a fresh air valve is provided at the air inlet of the first air duct.

[0017] In one embodiment of this application, a primary filter is further provided in the first air duct, and the primary filter is located between the fresh air valve and the evaporator.

[0018] In one embodiment of this application, a fresh air surface cooler is further provided in the first air duct, and the fresh air surface cooler is located between the pre-filter and the evaporator.

[0019] In one embodiment of this application, the air inlet of the second air duct is connected to the first air duct, and the air inlet of the second air duct is located between the positive pressure fan and the medium-efficiency filter.

[0020] In one embodiment of this application, a fire damper is further provided in the first air duct, and the fire damper is located at the air outlet of the first condenser.

[0021] In one embodiment of this application, the output end of the first air duct is connected to the drying chamber, the drying chamber is connected to a third air duct, the air inlet of the third air duct is connected to the drying chamber, the air outlet of the third air duct is connected to the first air duct, and the air outlet of the third air duct is located between the evaporator and the positive pressure fan.

[0022] By adopting the above technical solution, a rotary dehumidification module is set between the evaporator and the first condenser, and a series treatment process of dehumidification-adsorption-reheating is realized in the first air duct, which significantly reduces the moisture content of the air and thus achieves low dew point air supply. At the same time, the two-stage condensation structure formed by the series connection of the first condenser and the second condenser not only realizes air reheating, but also makes full use of the waste heat of the refrigerant to heat the regenerated air, which improves the regeneration efficiency of the rotary dehumidification module and significantly reduces the overall energy consumption of the system. In addition, the use of a closed refrigerant circulation path to achieve unified control of the evaporator, the first condenser and the second condenser improves the stability and efficiency of system operation. Attached Figure Description

[0023] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0025] 10. Evaporator; 11. Compressor; 12. First condenser; 13. Second condenser; 21. Positive pressure fan; 22. Medium-efficiency filter; 23. First surface cooler; 24. Fresh air valve; 25. Pre-filter; 26. Fresh air surface cooler; 30. First air duct; 40. Rotary dehumidifier module; 50. Fire damper; 60. Third air duct; 70. Second air duct. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain this utility model and do not constitute a limitation on this utility model.

[0027] like Figure 1 As shown, in order to achieve the above objectives, this utility model proposes a dehumidification system, comprising:

[0028] Evaporator 10 is located inside the first air duct 30. The refrigerant inside the evaporator 10 evaporates and condenses the airflow in the air duct to reduce the moisture content of the airflow.

[0029] The compressor 11 is connected to the evaporator 10 and is used to compress the refrigerant output from the evaporator 10 into liquid refrigerant;

[0030] The first condenser 12 is connected to the compressor 11 and is located in the first air duct 30. It is used to heat the airflow after passing through the evaporator 10.

[0031] The second condenser 13, connected to the first condenser 12, is used to receive the refrigerant in the first condenser 12 and is connected to the evaporator 10 through a throttling valve to achieve refrigerant circulation; and

[0032] The rotary dehumidification module 40 has a first part located in the first air duct 30 and between the evaporator 10 and the first condenser 12. The second part of the rotary dehumidification module 40 is located in the second air duct 70, and the second condenser 13 is located in the second air duct 70 and at the front end of the air inlet of the second part of the rotary dehumidification module 40.

[0033] Specifically, the evaporator 10 is installed inside the first air duct 30. Refrigerant is introduced into the evaporator 10. The air to be treated flowing in the first air duct 30 is cooled and condensed by the heat absorption process of the refrigerant evaporation in the evaporator 10, thereby reducing the temperature of the air and condensing the water vapor contained therein, thus achieving preliminary dehumidification of the air.

[0034] The compressor 11 is connected to the evaporator 10. The compressor 11 is used to compress the refrigerant in the evaporator 10, which is in a gaseous state after absorbing heat, into a high-temperature and high-pressure gaseous refrigerant, so as to drive the continuous operation of the entire refrigeration cycle.

[0035] The first condenser 12 is connected to the compressor 11 and is also located in the first air duct 30. The first condenser 12 is used to heat the air after it has been cooled and dehumidified by the evaporator 10, thereby increasing its temperature.

[0036] The second condenser 13 is connected in series after the first condenser 12. The second condenser 13 receives the high-temperature and high-pressure refrigerant flowing out of the first condenser 12, and after being reduced in pressure and throttled by the expansion valve, it enters the evaporator 10, forming a closed refrigerant circulation path. The second condenser 13 is located in the second air duct 70 and is used to heat the air in the second air duct 70. The second air duct 70 is an air regeneration path, providing thermal energy support to the regeneration end of the rotary dehumidification module 40.

[0037] The rotary dehumidifier module 40 includes a first part and a second part. The first part is disposed in a first air duct 30 and located between the evaporator 10 and the first condenser 12. The first part of the rotary dehumidifier module 40 is used to adsorb moisture from the air in the first air duct 30 to further reduce the humidity content of the air. The second part of the rotary dehumidifier module 40 is disposed in a second air duct 70. High-temperature air in the second air duct 70 flows through the second part of the rotary dehumidifier module 40 to regenerate the moisture-absorbing material of the rotary dehumidifier module 40, causing it to desorb moisture and thus maintaining the continuous adsorption efficiency. The second condenser 13 is disposed in the second air duct 70 and located at the front end of the air inlet of the second part of the rotary dehumidifier module 40, and is used to heat the regenerated air entering the second part to improve the regeneration efficiency.

[0038] To improve the system's energy efficiency ratio, the first condenser 12 and the second condenser 13 together constitute a two-stage condensation recovery system. The first condenser 12 achieves air reheating through air heating, while the second condenser 13 improves the regeneration efficiency of the rotary dehumidification module 40 by preheating the regenerated air, thereby reducing the need for additional heating energy.

[0039] By adopting the above technical solution, a rotary dehumidification module 40 is set between the evaporator 10 and the first condenser 12, and a series processing flow of dehumidification-adsorption-reheating is realized in the first air duct 30, which significantly reduces the moisture content of the air and thus achieves low dew point air supply. At the same time, the two-stage condensation structure formed by the series connection of the first condenser 12 and the second condenser 13 not only realizes air reheating, but also makes full use of the waste heat of the refrigerant to heat the regenerated air, which improves the regeneration efficiency of the rotary dehumidification module 40 and significantly reduces the overall energy consumption of the system. In addition, the use of a closed refrigerant circulation path to realize unified control of the evaporator 10, the first condenser 12 and the second condenser 13 improves the stability and efficiency of system operation.

[0040] In one embodiment of this application, a positive pressure fan 21 is provided in the first air duct 30, and the positive pressure fan 21 is located between the evaporator 10 and the first part of the rotary dehumidification module 40.

[0041] Specifically, the positive pressure fan 21 provides a continuous and stable power output as air flows through the evaporator 10 and into the rotary dehumidification module 40. By placing the positive pressure fan 21 at this location, a positive pressure environment is created inside the first air duct 30, thereby improving the controllability of airflow.

[0042] The selection of the positive pressure fan 21 can be determined based on the duct cross-section, system pressure loss and target air volume. Its operating parameters should match the air state after the evaporator 10 to avoid airflow disturbance caused by air volume or air pressure incompatibility.

[0043] By adopting the above technical solution, by setting a positive pressure fan 21 between the evaporator 10 and the first part of the rotary dehumidification module 40, a positive pressure environment can be effectively established in the first air duct 30, which facilitates airflow transportation.

[0044] In one embodiment of this application, a medium-efficiency filter 22 is further provided in the first air duct 30, and the medium-efficiency filter 22 is disposed between the positive pressure fan 21 and the first part of the rotary dehumidification module 40.

[0045] Specifically, the medium-efficiency filter 22 is used to further filter the air delivered after passing through the positive pressure fan 21. It is mainly used to remove medium-sized dust, particulate impurities and other pollutants in the air to prevent these impurities from entering the first part of the rotary dehumidification module 40, affecting the adsorption efficiency of the moisture-absorbing material or causing blockage and pollution.

[0046] The filtration efficiency of the medium-efficiency filter 22 can be selected according to the required air cleanliness level, using a filter with a rated filtration efficiency of F7 to F9. It also features a detachable structure for easy maintenance and replacement. The medium-efficiency filter 22 is positioned after the positive pressure fan 21, utilizing the kinetic energy output by the fan to overcome filtration resistance. This ensures that the air still has sufficient flow velocity and air pressure after passing through the medium-efficiency filter 22, guaranteeing system operating efficiency.

[0047] By adopting the above technical solution, by setting a medium-efficiency filter 22 between the positive pressure fan 21 and the first part of the rotary dehumidification module 40, residual dust and particulate matter in the air can be effectively removed, pollutants can be prevented from entering the adsorption components, the service life of the rotary dehumidification module 40 can be extended, its long-term stable operation can be ensured, and the air treatment quality can be improved, which helps to improve the overall cleanliness control and maintenance efficiency of the system.

[0048] In one embodiment of this application, a first surface cooler 23 is further provided in the first air duct 30, and the first surface cooler 23 is located between the first part of the rotary dehumidification module 40 and the first condenser 12.

[0049] Specifically, the first surface cooler 23 is used to cool the air that still has a certain temperature rise after passing through the first part of the rotary dehumidification module 40, so as to reduce the temperature of this part of the air and further regulate its humidity. Since the air will rise in temperature due to heat release from adsorption and dehumidification during the first part of the rotary dehumidification module 40, cooling the air by the first surface cooler 23 before entering the first condenser 12 helps to improve the thermal efficiency control in the subsequent reheat process, making the temperature and humidity of the final delivered air more stable and more accurate.

[0050] The first surface cooler 23 can use chilled water or refrigerant as the cooling medium, and its heat exchanger structure can be selected as finned tube, shell and tube, or other forms according to specific needs. The cooling capacity of the first surface cooler 23 should match the outlet air temperature of the rotary dehumidification module 40 and the target air supply state to ensure that the air is in a controllable state before entering the first condenser 12.

[0051] By adopting the above technical solution, by setting a first surface cooler 23 between the first part of the rotary dehumidification module 40 and the first condenser 12, the air temperature that rises due to adsorption heat release can be effectively reduced, providing a more ideal initial air state for the subsequent reheat process, thereby improving the system's ability to finely control the supply air temperature and dew point, improving heat distribution efficiency, and enhancing the energy efficiency and stability of the dehumidification system.

[0052] In one embodiment of this application, a fresh air valve 24 is provided at the air inlet of the first air duct 30.

[0053] Specifically, the fresh air valve 24 is used to regulate the flow of external air entering the first air duct 30. By controlling the opening degree of the fresh air valve 24, the airflow in the first air duct 30 can be precisely adjusted, thereby affecting the working status of subsequent air handling units (including evaporator 10, rotary dehumidifier module 40, and condenser, etc.).

[0054] The fresh air valve 24 can be an electrically adjustable valve structure, linked to the system controller, and automatically controls its opening based on feedback from indoor and outdoor temperature and humidity sensors. The fresh air valve 24 should have good airtightness and corrosion resistance to ensure stability and sealing effect during long-term operation.

[0055] By adopting the above technical solution, by setting a fresh air valve 24 at the air inlet of the first air duct 30, the air flow rate entering the system can be actively adjusted. This not only improves the flexibility and adaptability of the entire dehumidification system, but also optimizes the load distribution and energy consumption control in the subsequent dehumidification process, which helps to achieve energy-saving operation, precise air delivery and efficient humidity management.

[0056] In one embodiment of this application, a primary filter 25 is further provided in the first air duct 30, and the primary filter 25 is located between the fresh air valve 24 and the evaporator 10.

[0057] Specifically, the primary filter 25 is used to perform primary filtration on the air entering the first air duct 30 through the fresh air valve 24. It is mainly used to remove large particulate matter, suspended dust, fibrous impurities, etc. from the air to prevent particulate pollutants from entering the evaporator 10 and subsequent air handling components, which could lead to a decrease in heat exchange efficiency, component blockage, or a shortened service life.

[0058] The pre-filter 25 is preferably a plate or pleated structure, with a filtration efficiency level selectable from G3 to G4, and should have a modular structure that is easy to disassemble and replace. The pre-filter 25 is located between the fresh air valve 24 and the evaporator 10, so that the filtration effect occurs in the initial stage of air entering the system, thus forming the first air purification barrier and improving the basic air treatment quality of the entire system.

[0059] By adopting the above technical solution, by setting a pre-filter 25 between the fresh air valve 24 and the evaporator 10, preliminary purification can be carried out in the first stage of air entering the dehumidification system, preventing particulate pollutants from causing pollution or damage to the evaporator 10 and downstream components, extending equipment life, improving air treatment quality, enhancing the overall operational stability and maintenance convenience of the system, and helping to improve the cleanliness level of the terminal air supply.

[0060] In one embodiment of this application, a fresh air surface cooler 26 is further provided in the first air duct 30, and the fresh air surface cooler 26 is located between the primary filter 25 and the evaporator 10.

[0061] Specifically, the fresh air surface cooler 26 is used to initially cool the fresh air after it has been treated by the pre-filter 25, thereby reducing its temperature and partially condensing the moisture in the air, thus reducing the cooling and dehumidification load on the evaporator 10 and improving the overall energy efficiency of the system. The fresh air surface cooler 26 typically uses chilled water or refrigerant as the cooling medium, and its heat exchange structure can be finned tube or flat plate type to ensure efficient heat exchange between the air and the refrigerant.

[0062] The fresh air surface cooler 26 is installed after the primary filter 25 and before the evaporator 10, so that the temperature and humidity of the air entering the evaporator 10 are under control.

[0063] The fresh air surface cooler 26 can be linked with temperature sensors, humidity sensors and system controllers to automatically adjust the cooling intensity according to the set target dew point, so as to achieve energy-saving operation and intelligent control.

[0064] By adopting the above technical solution, by setting a fresh air surface cooler 26 between the pre-filter 25 and the evaporator 10, the air entering the evaporator 10 can be pre-cooled, reducing its enthalpy and moisture content, thereby reducing the cooling load of the evaporator 10 and improving the system dehumidification efficiency.

[0065] In one embodiment of this application, the air inlet of the second air duct 70 is connected to the first air duct 30, and the air inlet of the second air duct 70 is located between the positive pressure fan 21 and the medium-efficiency filter 22.

[0066] Specifically, the second air duct 70 is used to provide regeneration air to the second part of the rotary dehumidification module 40. Its air inlet introduces partially cooled air from the first air duct 30 that has not yet passed through the medium-efficiency filter 22. By placing the air inlet of the second air duct 70 between the positive pressure fan 21 and the medium-efficiency filter 22, on the one hand, the airflow power provided by the positive pressure fan 21 can be used to improve the flow rate and stability of the regeneration air; on the other hand, this arrangement can ensure that the source of the regeneration air is clean air cooled by the evaporator 10 and has not been further filtered by the medium-efficiency filter 22, avoiding the additional resistance generated by the medium-efficiency filter 22 from affecting the regeneration air volume.

[0067] The second air duct 70 can be configured as a bypass pipe and equipped with a controllable valve to adjust the regeneration air volume or shut off the regeneration air source under specific operating conditions. The location of the bypass should ensure that the temperature and humidity of the regeneration air drawn from the first air duct 30 are suitable for the regeneration process and work together with the second condenser 13 to improve the desorption efficiency of the adsorbent material in the rotary dehumidification module 40.

[0068] By adopting the above technical solution, by connecting the air inlet of the second air duct 70 with the first air duct 30 and arranging it between the positive pressure fan 21 and the medium-efficiency filter 22, internal airflow with suitable temperature and humidity characteristics can be efficiently introduced as the regeneration air source for the rotary dehumidification module 40, avoiding the pre-treatment energy consumption required for additional fresh air introduction. At the same time, the airflow energy of the positive pressure section is used to enhance the stability and efficiency of the regeneration air, thereby improving the rotary regeneration effect, reducing energy consumption, optimizing the internal airflow organization of the system, and improving the overall operational reliability and energy-saving performance of the dehumidification system.

[0069] In one embodiment of this application, a fire damper 50 is also provided in the first air duct 30, and the fire damper 50 is located at the air outlet of the first condenser 12.

[0070] Specifically, the fire damper 50 is used to automatically close the outlet of the first air duct 30 in the event of a fire or abnormal high temperature, preventing flames, smoke, or toxic and harmful gases from spreading along the air duct to other areas, thus playing a role in safety isolation and fire spread control. The fire damper 50 is located at the air outlet of the first condenser 12, i.e., at the end of the air supply end, and can cut off the exhaust path of the air processed by the first condenser 12 in an emergency, thereby effectively blocking the spread of fire.

[0071] The fire damper 50 can be a mechanical fire damper 50 with a fusible link, or an electric fire damper 50 linked to a fire alarm system, to achieve an automatic closing function. The material of the fire damper 50 should have high temperature resistance and corrosion resistance, and the valve body structure should ensure good sealing performance in the closed state to prevent air leakage or failure to close due to malfunction.

[0072] By adopting the above technical solution, by installing a fire damper 50 at the air outlet of the first condenser 12, the ventilation path of the air duct can be quickly cut off in case of fire or other emergencies, effectively preventing fire or smoke from spreading to other areas through the air duct, and improving the safety protection capability of the entire dehumidification system.

[0073] In one embodiment of this application, the output end of the first air duct 30 is connected to the drying chamber, the drying chamber is connected to a third air duct 60, the air inlet of the third air duct 60 is connected to the drying chamber, the air outlet of the third air duct 60 is connected to the first air duct 30, and the air outlet of the third air duct 60 is located between the evaporator 10 and the positive pressure fan 21.

[0074] Specifically, the drying chamber is connected to a third air duct 60, the air inlet of the third air duct 60 is connected to the inside of the drying chamber, and is used to draw out the return air in the drying chamber; the air outlet of the third air duct 60 is connected to the first air duct 30, and the air outlet of the third air duct 60 is located between the evaporator 10 and the positive pressure fan 21.

[0075] Through this structure, some of the low-humidity air in the drying chamber after use can return to the first air duct 30 through the third air duct 60, forming a mixed airflow of fresh air and return air. This air then re-enters the evaporator 10 for deep cooling and dehumidification before being sent back into the drying chamber, achieving air recycling. The air outlet of the third air duct 60 is located at the front end of the evaporator 10, ensuring that the return air is treated by the evaporator 10 before entering the positive pressure fan 21, thereby ensuring that the airflow entering the subsequent dehumidification section has a stable and low initial moisture content.

[0076] A regulating valve or a proportional mixing valve can be installed on the third air duct 60 to flexibly adjust the ratio of fresh air to return air according to the humidity and temperature conditions inside the drying room, thereby achieving constant dew point air supply control, improving energy efficiency and reducing fresh air load.

[0077] This structure allows switching between "fresh air" mode and "fresh air + return air hybrid" mode during system operation, effectively adapting to energy consumption and dehumidification capacity requirements under different operating conditions.

[0078] By adopting the above technical solution, the output end of the first air duct 30 is connected to the drying room, and the return air of the drying room is introduced into the first air duct 30 through the third air duct 60, with the inlet located between the evaporator 10 and the positive pressure fan 21. This not only realizes the recycling of air and reduces the energy consumption of fresh air treatment, but also allows the return air to be pre-cooled by the evaporator 10, which is beneficial to improving the overall dehumidification efficiency and ensuring the low dew point requirement of the supply air.

[0079] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A dehumidification system, characterized in that, include: The evaporator, located in the first air duct, condenses and cools the airflow in the air duct by evaporating the refrigerant inside the evaporator, thereby reducing the moisture content of the airflow. A compressor, connected to the evaporator, is used to compress the refrigerant output from the evaporator into liquid refrigerant; The first condenser is connected to the compressor and is located in the first air duct. It is used to heat the airflow after passing through the evaporator. A second condenser, connected to the first condenser, is used to receive refrigerant from the first condenser and is connected to the evaporator via a throttling valve to achieve refrigerant circulation; and The rotary dehumidification module has a first part located in the first air duct and between the evaporator and the first condenser, and a second part located in the second air duct. The second condenser is located in the second air duct and at the front end of the air inlet of the second part of the rotary dehumidification module.

2. The dehumidification system as described in claim 1, characterized in that, A positive pressure fan is installed in the first air duct, and the positive pressure fan is located between the evaporator and the first part of the rotary dehumidification module.

3. The dehumidification system as described in claim 2, characterized in that, The first air duct is also equipped with a medium-efficiency filter, which is located between the positive pressure fan and the first part of the rotary dehumidification module.

4. The dehumidification system as described in claim 1, characterized in that, The first air duct is also equipped with a first surface cooler, which is located between the first part of the rotary dehumidification module and the first condenser.

5. The dehumidification system as described in claim 1, characterized in that, A fresh air valve is installed at the air inlet of the first air duct.

6. The dehumidification system as described in claim 5, characterized in that, The first air duct is also equipped with a pre-filter, which is located between the fresh air valve and the evaporator.

7. The dehumidification system as described in claim 6, characterized in that, The first air duct is also equipped with a fresh air surface cooler, which is located between the pre-filter and the evaporator.

8. The dehumidification system as described in claim 3, characterized in that, The air inlet of the second air duct is connected to the first air duct, and the air inlet of the second air duct is located between the positive pressure fan and the medium-efficiency filter.

9. The dehumidification system as described in claim 1, characterized in that, The first air duct is also equipped with a fire damper, which is located at the air outlet of the first condenser.

10. The dehumidification system as described in claim 2, characterized in that, The output end of the first air duct is connected to the drying chamber, and the drying chamber is connected to a third air duct. The air inlet of the third air duct is connected to the drying chamber, and the air outlet of the third air duct is connected to the first air duct. The air outlet of the third air duct is located between the evaporator and the positive pressure fan.

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