A rotary dehumidification system and its control method

Abstract

This invention provides a rotary dehumidification system and its control method. The rotary dehumidification system includes a first dehumidification rotor, a second dehumidification rotor, an air duct assembly, a main control device, and multiple air valves. By controlling the opening and closing of the air valves through the main control device, any one of the dehumidification rotors can work independently. When both dehumidification rotors are working, any one of them can be used as a primary dehumidification rotor. Thus, without replacing the dehumidification rotors or changing the original layout, by controlling the opening and closing of the air valves, the working time of the first and second dehumidification rotors as primary dehumidification rotors can be balanced, allowing the potential of each dehumidification rotor to be fully utilized, extending the maintenance cycle, reducing maintenance costs, and improving economic efficiency.

Description

Technical Field

[0001] This invention relates to the field of dehumidification technology, and in particular to a rotary dehumidification system and its control method. Background Technology

[0002] Humidity control is an important aspect of spatial environment regulation. Combined with temperature control, it has wide applications in areas such as human comfort and health, preservation of valuables and equipment, and special processes and application environments.

[0003] Rotary dehumidifier technology is one of the important technologies for humidity control. It has two important characteristics: first, it can be driven by renewable energy and waste heat; second, it can perform deep dehumidification, making it particularly suitable for occasions with high environmental protection and dehumidification requirements.

[0004] The core component of a rotary dehumidification system is the dehumidification rotor, which is divided into two zones: a dehumidification zone and a regeneration zone.

[0005] In the dehumidification zone, water vapor in the treated air is adsorbed by the desiccant, reducing the air humidity; at the same time, the moisture content of the desiccant increases, decreasing its dehumidification capacity. In the regeneration zone, regeneration air is heated to the regeneration temperature before entering the zone, where the desiccant is desorbed, reducing its moisture content and restoring its dehumidification capacity.

[0006] In applications with heavy dehumidification tasks, a two-stage dehumidification process is typically required to meet the dehumidification requirements. The treated air passes through the first-stage dehumidifier, where humidity decreases and temperature increases, allowing for cooling using a cooler. It then enters the second-stage dehumidifier for a second round of dehumidification, further reducing humidity and increasing temperature again, which can then be cooled using a cooler.

[0007] The existing two-stage rotary dehumidification system has the following problems during use: because the first-stage rotary wheel is more prone to getting dirty as it is the inlet for air processing and also bears a heavier dehumidification task, it is more likely to age and experience performance degradation.

[0008] When a rotary dehumidifier system cannot meet the dehumidification requirements, the rotor needs to be replaced. There are three options: ① Replace the primary rotor; ② Swap the primary and secondary rotors and continue using it; ③ Replace both the primary and secondary rotors.

[0009] In Option ①, the secondary rotor also exhibits a certain degree of aging and degradation, with an unclear replacement cycle that could lead to a significant reduction in the maintenance cycle. In Option ②, swapping the rotors requires additional maintenance costs, and the repair cycle is shortened after the swap. In Option ③, although the secondary rotor is aged and its performance has deteriorated, it can still be used, so direct replacement increases costs. Summary of the Invention

[0010] Therefore, in response to at least one of the above problems, the present invention provides a rotary dehumidification system and its control method.

[0011] This invention is implemented using the following scheme: This invention proposes a rotary dehumidification system, comprising a first dehumidification rotor, a second dehumidification rotor, a duct assembly, a main control device, and multiple air valves. The duct assembly connects the first and second dehumidification rotors, and includes multiple ducts, each duct being equipped with at least one air valve. The main control device controls the opening and closing of the air valves, thereby allowing the rotary dehumidification system to switch between the following systems: a single-stage rotary dehumidification system using only the first dehumidification rotor, a single-stage rotary dehumidification system using only the second dehumidification rotor, a two-stage rotary dehumidification system using the first and second dehumidification rotors as primary and secondary dehumidification rotors, respectively, and a two-stage rotary dehumidification system using the second and first dehumidification rotors as primary and secondary dehumidification rotors, respectively.

[0012] In one embodiment, each of the first dehumidifying rotor and the second dehumidifying rotor includes a dehumidification zone and a regeneration zone; the duct assembly includes a first air inlet duct, a second air inlet duct, a first air outlet duct, a second air outlet duct, a first transfer pipe, and a second transfer pipe. The first air inlet pipe connects the air inlet to be treated to the dehumidification zone air inlet of the first dehumidification rotor; the second air inlet pipe connects the air inlet to be treated to the dehumidification zone air inlet of the second dehumidification rotor; the first air outlet pipe connects the dehumidification zone air outlet of the first dehumidification rotor to the treated air outlet; the second air outlet pipe connects the dehumidification zone air outlet of the second dehumidification rotor to the treated air outlet; the first adapter pipe connects the dehumidification zone air outlet of the first dehumidification rotor to the dehumidification zone air inlet of the second dehumidification rotor; the second adapter pipe connects the dehumidification zone air outlet of the second dehumidification rotor to the dehumidification zone air inlet of the first dehumidification rotor. Each of the first air inlet pipe, the second air inlet pipe, the first air outlet pipe, the second air outlet pipe, the first transfer pipe, and the second transfer pipe is provided with at least one air valve.

[0013] In one embodiment, the air valves on the second air inlet pipe, the first air outlet pipe, and the second transfer pipe are closed, and the air valves on the first air inlet pipe, the second air outlet pipe, and the first transfer pipe are opened, so as to switch the rotary dehumidification system to a two-stage rotary dehumidification system with the first dehumidification rotary wheel and the second dehumidification rotary wheel as the first-stage dehumidification rotary wheel and the second-stage dehumidification rotary wheel, respectively.

[0014] In one embodiment, the air valves on the first air inlet pipe, the second air outlet pipe, and the first transfer pipe are closed, while the air valves on the second air inlet pipe, the first air outlet pipe, and the second transfer pipe are opened, so as to switch the rotary dehumidification system to a two-stage rotary dehumidification system with the second dehumidification rotor and the first dehumidification rotor as the first-stage dehumidification rotor and the second-stage dehumidification rotor, respectively.

[0015] In one embodiment, the device further includes a first cooler and a second cooler, wherein the first cooler is disposed at the dehumidification zone outlet of the first dehumidification rotor, and the second cooler is disposed at the dehumidification zone outlet of the second dehumidification rotor.

[0016] In one embodiment, a third cooler is also included, which is located before the processed air outlet.

[0017] The present invention also proposes a control method for a rotary dehumidification system, the rotary dehumidification system comprising a first dehumidification rotor, a second dehumidification rotor, a duct assembly, a main control device, and multiple air valves, the duct assembly connecting the first dehumidification rotor and the second dehumidification rotor, the duct assembly comprising multiple air ducts, each air duct being provided with at least one air valve; The control method includes controlling the opening and closing of the air valve, thereby switching the rotary dehumidification system between the following systems: a single-stage rotary dehumidification system using only the first dehumidification rotor, a single-stage rotary dehumidification system using only the second dehumidification rotor, a two-stage rotary dehumidification system using the first dehumidification rotor and the second dehumidification rotor as primary and secondary dehumidification rotors respectively, and a two-stage rotary dehumidification system using the second dehumidification rotor and the first dehumidification rotor as primary and secondary dehumidification rotors respectively.

[0018] In one embodiment, the opening and closing of the air valve is controlled to balance the working time of the first dehumidifying impeller and the second dehumidifying impeller as primary dehumidifying impellers.

[0019] In one embodiment, each of the first dehumidifying rotor and the second dehumidifying rotor includes a dehumidification zone and a regeneration zone; the duct assembly includes a first air inlet duct, a second air inlet duct, a first air outlet duct, a second air outlet duct, a first transfer pipe, and a second transfer pipe. The first air inlet pipe connects the air inlet to be treated to the dehumidification zone air inlet of the first dehumidification rotor; the second air inlet pipe connects the air inlet to be treated to the dehumidification zone air inlet of the second dehumidification rotor; the first air outlet pipe connects the dehumidification zone air outlet of the first dehumidification rotor to the treated air outlet; the second air outlet pipe connects the dehumidification zone air outlet of the second dehumidification rotor to the treated air outlet; the first adapter pipe connects the dehumidification zone air outlet of the first dehumidification rotor to the dehumidification zone air inlet of the second dehumidification rotor; the second adapter pipe connects the dehumidification zone air outlet of the second dehumidification rotor to the dehumidification zone air inlet of the first dehumidification rotor. Each of the first air inlet pipe, the second air inlet pipe, the first air outlet pipe, the second air outlet pipe, the first transfer pipe, and the second transfer pipe is equipped with at least one air valve; the air valves on the second air inlet pipe, the first air outlet pipe, and the second transfer pipe are controlled to close, and the air valves on the first air inlet pipe, the second air outlet pipe, and the first transfer pipe are opened, so as to switch the rotary dehumidification system into a two-stage rotary dehumidification system with the first dehumidification rotary wheel and the second dehumidification rotary wheel as the first-stage dehumidification rotary wheel and the second-stage dehumidification rotary wheel, respectively.

[0020] In one embodiment, the air valves on the first air inlet pipe, the second air outlet pipe, and the first transfer pipe are closed, while the air valves on the second air inlet pipe, the first air outlet pipe, and the second transfer pipe are opened, so as to switch the rotary dehumidification system to a two-stage rotary dehumidification system with the second dehumidification rotor and the first dehumidification rotor as the first-stage dehumidification rotor and the second-stage dehumidification rotor, respectively.

[0021] The technical solution provided by this invention has the following technical effects: This invention provides a rotary dehumidification system and its control method. The rotary dehumidification system includes a first dehumidification rotor, a second dehumidification rotor, an air duct assembly, a main control device, and multiple air valves. By controlling the opening and closing of the air valves through the main control device, any one of the dehumidification rotors can work independently. When both dehumidification rotors are working, any one of them can be used as a primary dehumidification rotor. Thus, without replacing the dehumidification rotors or changing the original layout, by controlling the opening and closing of the air valves, the working time of the first and second dehumidification rotors as primary dehumidification rotors can be balanced, allowing the potential of each dehumidification rotor to be fully utilized, extending the maintenance cycle, reducing maintenance costs, and improving economic efficiency. Attached Figure Description

[0022] Figure 1 This is a system schematic diagram of the rotary dehumidification system according to an embodiment of the present invention. Detailed Implementation

[0023] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0025] Reference Figure 1 This embodiment provides a rotary dehumidification system, including a first dehumidification rotary wheel 1, a second dehumidification rotary wheel 2, a first cooler 91, a second cooler 92, a third cooler 93, a first valve group A, a second valve group B, a third valve group C, a fourth valve group D, an air duct group 7, and a main control device.

[0026] Each of the first dehumidifying rotor 1 and the second dehumidifying rotor 2 includes a dehumidification zone 18 and a regeneration zone 19. A desiccant is uniformly distributed in each dehumidifying rotor. In the dehumidification zone 18, water vapor in the air to be treated is adsorbed by the desiccant, reducing the air humidity. The dehumidification process releases a large amount of adsorption heat, causing the air temperature to rise; simultaneously, the moisture content of the desiccant increases, and its dehumidification capacity decreases. As the rotor rotates, the desiccant in the dehumidification zone 18 is rotated to the regeneration zone 19. In the regeneration zone 19, regeneration air preheated to the regeneration temperature is introduced to desorb the desiccant, reducing its moisture content and restoring its dehumidification capacity. The desiccant is then rotated back to the dehumidification zone 18 for the next round of dehumidification, and this process is repeated.

[0027] Since the dehumidification process releases a large amount of adsorption heat, causing the air temperature to rise significantly, a first cooler 91 and a second cooler 92 are respectively installed after the first dehumidification rotor 1 and the second dehumidification rotor 2 to cool down the dehumidified air.

[0028] The first cooler 91 is located at the air outlet of the dehumidification zone 18 of the first dehumidification rotor 1, and is used to cool the processed air after it has been dehumidified by the first dehumidification rotor 1. It uses a natural cold source such as ambient air or water. The second cooler 92 is located at the air outlet of the dehumidification zone 18 of the second dehumidification rotor 2, and is used to cool the processed air after it has been dehumidified by the second dehumidification rotor 2. It also uses a natural cold source such as ambient air or water. The third cooler 93 is located before the processed air outlet and is used to perform final temperature regulation on the processed air. It usually cannot use a natural cold source and requires an additional cooling capacity from the refrigeration unit. Of course, in some embodiments, one or more of the first cooler 91, second cooler 92, and third cooler 93 may not be provided.

[0029] The first valve group A contains three air valves: air valve A1, air valve A2, and air valve A3. The second valve group B contains two air valves: air valve B1 and air valve B2. The third valve group C contains two air valves: air valve C1 and air valve C2. The fourth valve group D contains three air valves: air valve D1, air valve D2, and air valve D3.

[0030] The duct assembly 7 includes a first air inlet duct 71, a second air inlet duct 72, a first air outlet duct 73, a second air outlet duct 74, a first transfer pipe 75, and a second transfer pipe 76. The first air inlet duct 71 connects the inlet of the air to be treated to the air inlet of the dehumidification zone 18 of the first dehumidification rotor 1. An air valve A1 is provided on the first air inlet duct 71.

[0031] The second air inlet duct 72 connects the air inlet to the dehumidification zone 18 of the second dehumidification rotor 2. The second air inlet duct 72 is equipped with a damper A2 and a damper C1. Of course, in some other embodiments, only one of damper A2 and damper C1 may be provided.

[0032] The first air outlet duct 73 connects the air outlet of the first cooler 91 to the air inlet of the third cooler 93. The air outlet of the third cooler 93 is the processed air outlet. The first air outlet duct 73 is equipped with a damper B1 and a damper D3. Of course, in some other embodiments, only one of damper B1 and damper D3 may be provided. When the first cooler 91 and the third cooler 93 are not provided, the first air outlet duct 73 connects the air outlet of the dehumidification zone 18 of the first dehumidification rotor 1 to the processed air outlet.

[0033] The second air outlet duct 74 connects the air outlet of the second cooler 92 to the air inlet of the third cooler 93. An air valve D1 is installed on the second air outlet duct 74. When the second cooler 92 and the third cooler 93 are not installed, the second air outlet duct 74 connects the air outlet of the dehumidification zone 18 of the second dehumidification rotor 2 to the processed air outlet.

[0034] The first adapter pipe 75 connects the air outlet of the first cooler 91 to the air inlet of the dehumidification zone 18 of the second dehumidification rotor 2. The first adapter pipe 75 is equipped with a damper B2 and a damper C2. Of course, in some other embodiments, only one of damper B2 and damper C2 may be provided. When the first cooler 91 is not provided, the first adapter pipe 75 connects the air outlet of the dehumidification zone 18 of the first dehumidification rotor 1 to the air inlet of the dehumidification zone 18 of the second dehumidification rotor 2.

[0035] The second adapter pipe 76 connects the air outlet of the second cooler 92 to the air inlet of the dehumidification zone 18 of the first dehumidification rotor 1. The second adapter pipe 76 is equipped with air valve A3 and air valve D2. Of course, in some other embodiments, only one of air valve A3 and air valve D2 may be provided. When the second cooler 92 is not provided, the second adapter pipe 76 connects the air outlet of the dehumidification zone 18 of the second dehumidification rotor 2 to the air inlet of the dehumidification zone 18 of the first dehumidification rotor 1.

[0036] The main control device controls the opening and closing of each air valve, and in conjunction with the air duct assembly 7, the first dehumidification impeller 1, and the second dehumidification impeller 2, different system functions can be achieved.

[0037] Both the first dehumidifying impeller 1 and the second dehumidifying impeller 2 can be used independently to form a single-stage rotary dehumidification system. This single-stage rotary dehumidification system can be used when the dehumidification task is light and two-stage dehumidification is not required. When the first dehumidifying impeller 1 is used alone in the single-stage rotary dehumidification system, the air to be treated passes sequentially through the first air inlet pipe 71, the first dehumidifying impeller 1, the first cooler 91, the first air outlet pipe 73, and the third cooler 93 before being discharged from the outlet. At this time, the air valves on the second air inlet pipe 72, the second air outlet pipe 74, the first connecting pipe 75, and the second connecting pipe 76 are closed, while the air valves on the first air inlet pipe 71 and the first air outlet pipe 73 are open. That is, air valves A2, A3, B2, C1, C2, D1, and D2 are closed, while air valves A1, B1, and D3 remain open.

[0038] When the single-stage rotary dehumidification system is used alone with the second dehumidification rotor 2, the air to be treated passes sequentially through the second air inlet pipe 72, the second dehumidification rotor 2, the second cooler 92, the second air outlet pipe 74, and the third cooler 93 before being discharged from the outlet. At this time, the air valves on the first air inlet pipe 71, the first air outlet pipe 73, the first transfer pipe 75, and the second transfer pipe 76 are closed, while the air valves on the second air inlet pipe 72 and the second air outlet pipe 74 are open. That is, air valves A1, A3, B1, B2, C2, D2, and D3 are closed, while air valves A2, C1, and D1 remain open.

[0039] When the dehumidification task is heavy and single-stage dehumidification cannot meet the requirements, the first dehumidification rotor 1 and the second dehumidification rotor 2 can also be used together to form a two-stage rotor dehumidification system.

[0040] When the first dehumidifying impeller 1 and the second dehumidifying impeller 2 are used together, forming a two-stage dehumidification system with the first dehumidifying impeller 1 as the primary dehumidifying impeller and the second dehumidifying impeller 2 as the secondary dehumidifying impeller, the air to be treated sequentially passes through the first inlet pipe 71, the first dehumidifying impeller 1, the first cooler 91, the first transfer pipe 75, the second dehumidifying impeller 2, the second cooler 92, the second outlet pipe 74, and the third cooler 93 before being discharged from the outlet. At this time, the air valves on the second inlet pipe 72, the first outlet pipe 73, and the second transfer pipe 76 are closed, while the air valves on the first inlet pipe 71, the second outlet pipe 74, and the first transfer pipe 75 are open. That is, air valves A2, A3, B1, C1, D2, and D3 are closed, while air valves A1, B2, C2, and D1 remain open.

[0041] Because the first dehumidification rotor 1 is connected to the air inlet to be treated as a primary dehumidification rotor, it is more prone to getting dirty and bears a heavier dehumidification task. It usually ages and degrades in performance earlier than the secondary rotor.

[0042] When the dehumidification performance of the two-stage rotary dehumidification system fails to meet requirements due to the aging and performance degradation of its dehumidification rotors, in addition to solutions such as replacing the first-stage dehumidification rotor, replacing both dehumidification rotors, or disassembling and swapping the two rotors before reinstalling, this system can also interchange the functions of the first-stage and second-stage dehumidification rotors without disassembling them. That is, the second dehumidification rotor 2 becomes the first-stage dehumidification rotor of the system, and the first dehumidification rotor 1 becomes the second-stage dehumidification rotor of the system.

[0043] Specifically, the air valves on the first air inlet pipe 71, the second air outlet pipe 74, and the first transfer pipe 75 are closed, while the air valves on the second air inlet pipe 72, the first air outlet pipe 73, and the second transfer pipe 76 are opened. That is, air valves A1, B2, C2, and D1 are closed, while air valves A2, A3, B1, C1, D2, and D3 remain open. At this time, the air to be treated passes sequentially through the second air inlet pipe 72, the second dehumidification impeller 2, the second cooler 92, the second transfer pipe 76, the first dehumidification impeller 1, the first cooler 91, the first air outlet pipe 73, and the third cooler 93 before being discharged.

[0044] Therefore, without replacing the dehumidifying impellers or changing the original layout, by controlling the opening and closing of the air valves, the working time of the first and second dehumidifying impellers as primary dehumidifying impellers can be balanced, so that the potential of each dehumidifying impeller can be fully utilized, extending the maintenance cycle, reducing maintenance costs, and improving economic efficiency.

[0045] In summary, the control method of the rotary dehumidification system is as follows: controlling the opening and closing of the air valve, thereby switching the rotary dehumidification system between the following systems.

[0046] 1. A single-stage dehumidification system using the first dehumidification impeller 1 alone: ​​The air to be treated enters the first dehumidification impeller 1 and the first cooler 91 from the first air inlet pipe 71 through valve group A (A1 open, A2 and A3 closed), then enters the first air outlet pipe 73, passes through valve group B (B1 open, B2 closed) and valve group D (D3 open, D1 and D2 closed), and is discharged after passing through the third cooler 93.

[0047] 2. A single-stage dehumidification system using the second dehumidification impeller 2 alone: ​​The air to be treated enters the second air inlet pipe 72 through valve group A (A2 open, A1 and A3 closed), valve group C (C1 open, C2 closed), then through the second dehumidification impeller 2 and the second cooler 92, enters the second air outlet pipe 74, passes through valve group D (D1 open, D2 and D3 closed), and is discharged through the third cooler 93.

[0048] 3. A two-stage dehumidification system is constructed with the first dehumidification impeller 1 and the second dehumidification impeller 2 as the primary and secondary dehumidification impellers of the system, respectively: The air to be treated enters the first transfer pipe 75 through the first air inlet pipe 71, valve group A (A1 open, A2 and A3 closed), the first dehumidification impeller 1, and the first cooler 91, then through valve group B (B1 closed, B2 open), valve group C (C1 closed, C2 open), the second dehumidification impeller 2, and the second cooler 2, and enters the second air outlet pipe 74, then through valve group D (D1 open, D2 and D3 closed) and the third cooler 3, and is discharged from the treated air outlet.

[0049] 4. A two-stage dehumidification system is constructed with the second dehumidification impeller 2 and the first dehumidification impeller 1 as the first and second stages of dehumidification, respectively: The air to be treated enters the second transfer pipe 76 through the second air inlet pipe 72 via valve group A (A1 closed, A2 and A3 open), valve group C (C1 open, C2 closed), the second dehumidification impeller 2, and the second cooler 2. It then enters the first air outlet pipe 73 through valve group D (D1 closed, D2 and D3 open), valve group A (A1 closed, A2 and A3 open), the first dehumidification impeller 1, and the first cooler 1. Finally, it is discharged after passing through valve group B (B1 open, B2 closed), valve group D (D1 closed, D2 and D3 open) and the third cooler 3.

[0050] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A rotary dehumidification system, characterized in that, The system includes a first dehumidifying impeller, a second dehumidifying impeller, a duct assembly, a main control device, and multiple air valves. The duct assembly connects the first dehumidifying impeller and the second dehumidifying impeller. The duct assembly includes multiple air ducts, each of which is equipped with at least one air valve. The main control device controls the opening and closing of the air valves, thereby allowing the impeller dehumidification system to switch between the following systems: a single-stage impeller dehumidification system using only the first dehumidifying impeller; a single-stage impeller dehumidification system using only the second dehumidifying impeller; a two-stage impeller dehumidification system using the first and second dehumidifying impellers as primary and secondary dehumidifying impellers, respectively; and a two-stage impeller dehumidification system using the second and first dehumidifying impellers as primary and secondary dehumidifying impellers, respectively.

2. The rotary dehumidification system according to claim 1, characterized in that: Each of the first dehumidifying rotor and the second dehumidifying rotor includes a dehumidification zone and a regeneration zone; the duct assembly includes a first air inlet duct, a second air inlet duct, a first air outlet duct, a second air outlet duct, a first transfer pipe, and a second transfer pipe; The first air inlet pipe connects the air inlet to be treated to the dehumidification zone air inlet of the first dehumidification rotor; the second air inlet pipe connects the air inlet to be treated to the dehumidification zone air inlet of the second dehumidification rotor; the first air outlet pipe connects the dehumidification zone air outlet of the first dehumidification rotor to the treated air outlet; the second air outlet pipe connects the dehumidification zone air outlet of the second dehumidification rotor to the treated air outlet; the first adapter pipe connects the dehumidification zone air outlet of the first dehumidification rotor to the dehumidification zone air inlet of the second dehumidification rotor; the second adapter pipe connects the dehumidification zone air outlet of the second dehumidification rotor to the dehumidification zone air inlet of the first dehumidification rotor. Each of the first air inlet pipe, the second air inlet pipe, the first air outlet pipe, the second air outlet pipe, the first transfer pipe, and the second transfer pipe is provided with at least one air valve.

3. The rotary dehumidification system according to claim 2, characterized in that: The air valves on the second air inlet pipe, the first air outlet pipe, and the second transfer pipe are closed, and the air valves on the first air inlet pipe, the second air outlet pipe, and the first transfer pipe are opened, so as to switch the rotary dehumidification system into a two-stage rotary dehumidification system with the first dehumidification rotary wheel and the second dehumidification rotary wheel as the first-stage dehumidification rotary wheel and the second-stage dehumidification rotary wheel, respectively.

4. The rotary dehumidification system according to claim 2, characterized in that: The air valves on the first air inlet pipe, the second air outlet pipe, and the first transfer pipe are closed, and the air valves on the second air inlet pipe, the first air outlet pipe, and the second transfer pipe are opened, so as to switch the rotary dehumidification system into a two-stage rotary dehumidification system with the second dehumidification rotor and the first dehumidification rotor as the first-stage dehumidification rotor and the second-stage dehumidification rotor, respectively.

5. The rotary dehumidification system according to claim 2, characterized in that: It also includes a first cooler and a second cooler, the first cooler being located at the dehumidification zone air outlet of the first dehumidification rotor, and the second cooler being located at the dehumidification zone air outlet of the second dehumidification rotor.

6. The rotary dehumidification system according to claim 2, characterized in that: It also includes a third cooler, which is located before the processing air outlet.

7. A control method for a rotary dehumidification system, characterized in that, The rotary dehumidification system includes a first dehumidification rotor, a second dehumidification rotor, a duct assembly, a main control device, and multiple air valves. The duct assembly connects the first dehumidification rotor and the second dehumidification rotor. The duct assembly includes multiple air ducts, and each air duct is equipped with at least one air valve. The control method includes controlling the opening and closing of the air valve, thereby switching the rotary dehumidification system between the following systems: a single-stage rotary dehumidification system using only the first dehumidification rotor, a single-stage rotary dehumidification system using only the second dehumidification rotor, a two-stage rotary dehumidification system using the first dehumidification rotor and the second dehumidification rotor as primary and secondary dehumidification rotors respectively, and a two-stage rotary dehumidification system using the second dehumidification rotor and the first dehumidification rotor as primary and secondary dehumidification rotors respectively.

8. The control method for the rotary dehumidification system according to claim 7, characterized in that: By controlling the opening and closing of the air valve, the working time of the first dehumidification impeller and the second dehumidification impeller as primary dehumidification impellers is balanced.

9. The control method for the rotary dehumidification system according to claim 7, characterized in that: Each of the first dehumidifying rotor and the second dehumidifying rotor includes a dehumidification zone and a regeneration zone; the duct assembly includes a first air inlet duct, a second air inlet duct, a first air outlet duct, a second air outlet duct, a first transfer pipe, and a second transfer pipe; The first air inlet pipe connects the air inlet to be treated to the dehumidification zone air inlet of the first dehumidification rotor; the second air inlet pipe connects the air inlet to be treated to the dehumidification zone air inlet of the second dehumidification rotor; the first air outlet pipe connects the dehumidification zone air outlet of the first dehumidification rotor to the treated air outlet; the second air outlet pipe connects the dehumidification zone air outlet of the second dehumidification rotor to the treated air outlet; the first adapter pipe connects the dehumidification zone air outlet of the first dehumidification rotor to the dehumidification zone air inlet of the second dehumidification rotor; the second adapter pipe connects the dehumidification zone air outlet of the second dehumidification rotor to the dehumidification zone air inlet of the first dehumidification rotor. Each of the first air inlet pipe, the second air inlet pipe, the first air outlet pipe, the second air outlet pipe, the first transfer pipe, and the second transfer pipe is provided with at least one air valve; The air valves on the second air inlet pipe, the first air outlet pipe, and the second transfer pipe are closed, and the air valves on the first air inlet pipe, the second air outlet pipe, and the first transfer pipe are opened, so as to switch the rotary dehumidification system into a two-stage rotary dehumidification system with the first dehumidification rotary wheel and the second dehumidification rotary wheel as the first-stage dehumidification rotary wheel and the second-stage dehumidification rotary wheel, respectively.

10. The control method for the rotary dehumidification system according to claim 9, characterized in that: The air valves on the first air inlet pipe, the second air outlet pipe, and the first transfer pipe are closed, and the air valves on the second air inlet pipe, the first air outlet pipe, and the second transfer pipe are opened, so as to switch the rotary dehumidification system into a two-stage rotary dehumidification system with the second dehumidification rotor and the first dehumidification rotor as the first-stage dehumidification rotor and the second-stage dehumidification rotor, respectively.

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