Charging pile, charging pile fan control method and equipment

Abstract

The invention discloses a charging pile, a charging pile fan control method and equipment, and belongs to the technical field of charging pile control. According to the charging pile provided by the invention, the auxiliary fan set, the controller, the multiple fan sets, the temperature sensor and the AC / DC modules are integrated, the position layout of the fan sets corresponds to the AC / DC modules in a one-to-one mode, so that each AC / DC module can obtain accurate heat dissipation support, the fan sets are only started when needed, heat dissipation is only carried out on the AC / DC modules with the temperature rising, and the heat dissipation efficiency of the AC / DC modules is improved. The overall noise level of the charging pile is reduced; the auxiliary fan set is arranged in the area outside the AC / DC module in the charging pile and used for providing additional heat dissipation support, adjustment can be conducted according to the overall temperature condition of the charging pile, the heat dissipation efficiency is improved, and noise generated when the auxiliary fan set runs when not needed is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of charging pile control, and in particular to charging pile fan control. Background Art

[0002] With the booming development of the new energy electric vehicle industry, charging piles, as an important infrastructure for electric vehicles, have become the focus of the industry in terms of performance and user experience. The charging pile control system, as the "brain" of the charging pile, is responsible for managing and regulating the charging process to ensure safe, efficient and intelligent charging. However, in the actual application of charging piles, the noise problem has always been a pain point that is difficult to ignore.

[0003] The noise problem not only affects the quality of life of surrounding residents, but may also cause complaints and disputes, which has an adverse impact on the popularization of charging piles and the promotion of electric vehicles. In order to solve this problem, some charging pile manufacturers have begun to try to use speed-controlled fans, such as DC fans or BLDC fans, which can automatically adjust the speed according to the actual temperature of the charging pile, thereby reducing the noise level. However, since the cost of speed-controlled fans is relatively high and requires more complex control systems to support them, they still face certain challenges in market promotion.

[0004] In the domestic charging pile market, due to fierce competition, in order to reduce costs, most manufacturers have chosen the more cost-effective AC fan as a cooling solution for charging piles. The AC fan runs at a constant speed to ensure efficient heat dissipation. However, its limitation of being unable to adjust the speed leads to a significant increase in system noise, especially in the quiet night or when a low-noise environment is required, the noise problem is more prominent.

[0005] Therefore, how to reduce the noise of the AC fan in the charging pile has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0006] The object of the present invention is to provide a charging pile, a charging pile fan control method and a device to overcome the noise problem of AC fans in the prior art.

[0007] The present invention solves the above technical problems through the following technical solutions: A charging pile, comprising an auxiliary fan unit, a controller, a plurality of fan units, a plurality of temperature sensors and a plurality of AC / DC modules; The AC / DC module is installed in the charging pile. The position layout of the fan unit corresponds to the AC / DC module one by one. Each AC / DC module contains several AC / DC modules. The auxiliary fan unit is located outside the AC / DC module in the charging pile. A temperature sensor is set in the area of ​​each AC / DC module. The temperature sensor is electrically connected to the controller and is used to collect the real-time temperature of the corresponding AC / DC module area and send it to the controller when the charging pile is charging; the controller is electrically connected to each fan group respectively to start and stop the corresponding fan group; the controller is electrically connected to the auxiliary fan group to start and stop the auxiliary fan group.

[0008] A further improvement of the present invention is that each fan group comprises a plurality of fans connected in series, and the positions and layouts of the fans correspond one to one with the AC / DC modules.

[0009] A further improvement of the present invention is that it also includes a vehicle networking platform, and the controller is electrically connected to the vehicle networking platform.

[0010] A further improvement of the present invention is that the charging power of the charging pile is 480KW, there are three AC / DC modules, each AC / DC module includes four AC / DC modules, the charging power of each AC / DC module is 40KW, and there are three fan units.

[0011] The present invention also provides a charging pile fan control method, using the above-mentioned charging pile, comprising the following steps: Based on the number of AC / DC modules contained in each AC / DC module and the corresponding temperature, the start and stop status of the fan group is controlled; based on the number of AC / DC modules contained in all AC / DC modules and the corresponding temperature, the start and stop status of the auxiliary fan group is controlled.

[0012] A further improvement of the present invention is that controlling the start and stop state of the fan unit includes the following steps: Perform the following operations for each AC / DC module: obtain the total number m of AC / DC modules included in the AC / DC module, preset the critical temperature T of the AC / DC module, and obtain the real-time temperature t of each AC / DC module area. 1~m , get the real-time temperature t 1~m The number x of the samples that are greater than the critical temperature T; When x< Or real-time temperature t 1~m When the highest temperature in is ≤T-8℃, the condition of triggering the corresponding fan group to shut down is reached, and the controller sends a command to control the fan group corresponding to the AC / DC module to be in the off state; when x≥ When the condition of triggering the corresponding fan group to start is met, the controller sends a command to control the fan group corresponding to the AC / DC module to be turned on; In other cases, the fan unit maintains the current status unchanged.

[0013] A further improvement of the present invention is that controlling the start and stop state of the auxiliary fan group includes the following steps: Get the total number of AC / DC modules n, including the total number of AC / DC modules, and get the real-time temperature t of all AC / DC module areas 1~n , get the real-time temperature t 1~n The number of z values ​​greater than T-5℃ in the sample is used to obtain the real-time temperature t 1~n The number X of the particles with a temperature greater than the critical temperature T; When X ≥ Or z> When X< Or real-time temperature t 1~ When the highest temperature in is ≤T-10℃, the condition for triggering the auxiliary fan unit to be turned off is reached, and the controller sends a command to control the auxiliary fan unit to be turned off; In other cases, the auxiliary fan unit maintains the current state unchanged.

[0014] A further improvement of the present invention is that the critical temperature T is 40°C.

[0015] A further improvement of the present invention is that it also includes the following steps: When the conditions for triggering the corresponding fan group to turn on or off are met, the controller records the time Time that the AC / DC module maintains the current state. When Time < 5 min, the controller does not act; when Time ≥ 5 min, the controller issues a command; When the conditions for triggering the auxiliary fan group to turn on or off are met, the controller records the time Time that all AC / DC modules maintain the current state. When Time is less than 5 min, the controller does not act; when Time is greater than or equal to 5 min, the controller sends corresponding instructions to the corresponding fan group.

[0016] The present invention also provides a control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0017] Compared with the prior art, the positive and progressive effects of the present invention are: The charging pile provided by the present invention integrates an auxiliary fan group, a controller, a plurality of fan groups, a temperature sensor and an AC / DC module. Through precise temperature monitoring, intelligent start and stop control of the fan group and reasonable layout of the fan group, the noise problem caused by the use of AC fans in traditional charging piles is effectively overcome. Specifically, the position layout of the fan group corresponds to the AC / DC module one by one, so that each AC / DC module can obtain accurate heat dissipation support, so that the fan group is started only when needed, and only the AC / DC module with increased temperature is cooled, thereby reducing the overall noise level of the charging pile; the auxiliary fan group is arranged in an area outside the AC / DC module in the charging pile to provide additional heat dissipation support, and can be adjusted according to the overall temperature condition of the charging pile, which not only improves the heat dissipation efficiency, but also avoids the noise generated by the auxiliary fan group running when not needed.

[0018] Furthermore, each fan unit includes several fans connected in series, which not only improves the heat dissipation efficiency, but also increases the reliability and redundancy of the fan unit. Even if a fan fails, the other fans can continue to work, ensuring that the AC / DC module receives continuous heat dissipation support.

[0019] Furthermore, through the electrical connection between the controller and the Internet of Vehicles platform, the charging pile can upload the working status and temperature data to the Internet of Vehicles platform in real time, realizing remote monitoring and management, which helps to timely discover and solve potential problems and improve the operation and maintenance efficiency of the charging pile.

[0020] The present invention also provides a charging pile fan control method, which effectively overcomes the noise problem caused by the use of AC fans in traditional charging piles through intelligent temperature monitoring and fan group control strategy.

[0021] Furthermore, the temperature of the AC / DC modules in each AC / DC module is monitored in real time, and the start and stop status of the fan group is determined based on the number of modules and the temperature. When the temperature of more than half of the AC / DC modules exceeds the critical value T, the fan group starts to ensure timely heat dissipation. When the number of modules with lower temperatures is the majority or the maximum temperature is far below the critical value, the fan group is shut down to avoid unnecessary noise. This precise control strategy reduces the ineffective operation time of the fan group, thereby reducing noise.

[0022] Furthermore, the temperature conditions of all AC / DC modules are comprehensively considered, and the start and stop status of the auxiliary fan group is determined by calculating the number of modules whose temperatures exceed a specific threshold. When the temperatures of more modules are close to or exceed the critical value T, the auxiliary fan group is started to provide additional heat dissipation support. When the temperature is generally low, the auxiliary fan group is shut down to avoid unnecessary energy consumption and noise.

[0023] Furthermore, by adding a time judgment step, the method avoids frequent starting and stopping of the fan group, making the control of the fan group more accurate and reasonable; within a short period of time (such as within 5 minutes), even if the temperature conditions reach the conditions for triggering the start and stop of the fan group, the controller will not act immediately, thereby reducing the number of starts and noise generated by the fan group; at the same time, each start-up of the fan group consumes a certain amount of electrical energy, and frequent starts and stops will significantly increase energy consumption, and reducing the frequent start and stop of the fan group will help reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0025] Figure 1 A block diagram of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments, which are intended to explain the present invention rather than to limit it.

[0032] See also Figure 1 , a charging pile, comprising an auxiliary fan unit, a controller, a plurality of fan units, a plurality of temperature sensors and a plurality of AC / DC modules; The AC / DC module is installed in the charging pile. The position layout of the fan unit corresponds to the AC / DC module one by one. Each AC / DC module contains several AC / DC modules. The auxiliary fan unit is located outside the AC / DC module in the charging pile. A temperature sensor is set in the area of ​​each AC / DC module. The temperature sensor is electrically connected to the controller and is used to collect the real-time temperature of the corresponding AC / DC module area and send it to the controller when the charging pile is charging; the controller is electrically connected to each fan group respectively to start and stop the corresponding fan group; the controller is electrically connected to the auxiliary fan group to start and stop the auxiliary fan group.

[0033] The charging pile provided in the present application integrates an auxiliary fan group, a controller, several fan groups, a temperature sensor and an AC / DC module. Through precise temperature monitoring, intelligent start and stop control of the fan group and reasonable layout of the fan group, the noise problem caused by the use of AC fans in traditional charging piles is effectively overcome. Specifically, the position layout of the fan group corresponds one-to-one with the AC / DC module, so that each AC / DC module can obtain precise heat dissipation support, so that the fan group is started only when needed, and only the AC / DC module with increased temperature is cooled, thereby reducing the overall noise level of the charging pile; the auxiliary fan group is arranged in an area outside the AC / DC module in the charging pile to provide additional heat dissipation support, which can be adjusted according to the overall temperature condition of the charging pile, which not only improves the heat dissipation efficiency, but also avoids the noise generated by the auxiliary fan group running when it is not needed.

[0034] Specifically, each fan group includes a plurality of fans connected in series, and the positions and layouts of the fans correspond one-to-one to the AC / DC modules.

[0035] Each fan unit contains several fans connected in series, which not only improves the heat dissipation efficiency, but also increases the reliability and redundancy of the fan unit. Even if a fan fails, the other fans can continue to work, ensuring that the AC / DC module receives continuous heat dissipation support.

[0036] Specifically, it also includes a vehicle networking platform, and the controller is electrically connected to the vehicle networking platform.

[0037] Through the electrical connection between the controller and the Internet of Vehicles platform, the charging pile can upload the working status and temperature data to the Internet of Vehicles platform in real time, realizing remote monitoring and management, which helps to timely discover and solve potential problems and improve the operation and maintenance efficiency of the charging pile.

[0038] Specifically, the charging power of the charging pile is 480KW, there are three AC / DC modules, each AC / DC module contains four AC / DC modules, the charging power of each AC / DC module is 40KW, and there are three fan units.

[0039] Based on the same inventive concept, the present invention also provides a charging pile fan control method, using the above-mentioned charging pile, comprising the following steps: Based on the number of AC / DC modules contained in each AC / DC module and the corresponding temperature, the start and stop status of the fan group is controlled; based on the number of AC / DC modules contained in all AC / DC modules and the corresponding temperature, the start and stop status of the auxiliary fan group is controlled.

[0040] Through intelligent temperature monitoring and fan group control strategy, the noise problem caused by the use of AC fans in traditional charging piles is effectively overcome.

[0041] Specifically, controlling the start and stop status of the fan group includes the following steps: Perform the following operations for each AC / DC module: obtain the total number m of AC / DC modules included in the AC / DC module, preset the critical temperature T of the AC / DC module, and obtain the real-time temperature t of each AC / DC module area. 1~m , get the real-time temperature t 1~m The number x of the samples that are greater than the critical temperature T; When x< Or real-time temperature t 1~m When the highest temperature in is ≤T-8℃, the condition of triggering the corresponding fan group to shut down is reached, and the controller sends a command to control the fan group corresponding to the AC / DC module to be in the off state; when x≥ When the condition of triggering the corresponding fan group to start is met, the controller sends a command to control the fan group corresponding to the AC / DC module to be turned on; In other cases, the fan unit maintains the current status unchanged.

[0042] The AC / DC modules in each AC / DC module are monitored in real time, and the start / stop status of the fan unit is determined based on the number of modules and the temperature. When the temperature of more than half of the AC / DC modules exceeds the critical value T, the fan unit is started to ensure timely heat dissipation. When the number of modules with lower temperatures is the majority or the maximum temperature is far below the critical value, the fan unit is shut down to avoid unnecessary noise. This precise control strategy reduces the ineffective operation time of the fan unit, thereby reducing noise.

[0043] Specifically, controlling the start and stop status of the auxiliary fan group includes the following steps: Get the total number of AC / DC modules n, including the total number of AC / DC modules, and get the real-time temperature t of all AC / DC module areas 1~n , get the real-time temperature t 1~n The number of z values ​​greater than T-5℃ in the sample is used to obtain the real-time temperature t 1~n The number X of the particles with a temperature greater than the critical temperature T; When X ≥ Or z> When X< Or real-time temperature t 1~ When the highest temperature in is ≤T-10℃, the condition for triggering the auxiliary fan unit to be turned off is reached, and the controller sends a command to control the auxiliary fan unit to be turned off; In other cases, the auxiliary fan unit maintains the current state unchanged.

[0044] The temperature conditions of all AC / DC modules are comprehensively considered, and the start and stop status of the auxiliary fan group is determined by calculating the number of modules whose temperatures exceed a specific threshold. When the temperatures of more modules are close to or exceed the critical value T, the auxiliary fan group starts to provide additional heat dissipation support. When the temperature is generally low, the auxiliary fan group is shut down to avoid unnecessary energy consumption and noise.

[0045] Specifically, the critical temperature T is 40°C.

[0046] Specifically, the following steps are also included: When the conditions for triggering the corresponding fan group to turn on or off are met, the controller records the time Time that the AC / DC module maintains the current state. When Time < 5 min, the controller does not act; when Time ≥ 5 min, the controller issues a command; When the conditions for triggering the auxiliary fan group to turn on or off are met, the controller records the time Time that all AC / DC modules maintain the current state. When Time is less than 5 min, the controller does not act; when Time is greater than or equal to 5 min, the controller sends corresponding instructions to the corresponding fan group.

[0047] By adding a time judgment step, this method avoids the frequent start and stop of the fan unit, making the control of the fan unit more accurate and reasonable; within a short period of time (such as within 5 minutes), even if the temperature conditions reach the conditions for triggering the start and stop of the fan unit, the controller will not act immediately, thereby reducing the number of starts and noise generated by the fan unit; at the same time, each start of the fan unit consumes a certain amount of electrical energy, and frequent starts and stops will significantly increase energy consumption, and reducing the frequent start and stop of the fan unit will help reduce energy consumption.

[0048] Based on the same inventive concept, the present invention also provides a control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the above method when executing the computer program.

[0049] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0050] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or part of the technical solution that contributes to the prior art or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, ReAC-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

[0051] Finally, it should be noted that the above-listed embodiments exist only as one or more specific forms of expression of the technical solution of the present invention. Their purpose is to clearly explain the concept, principle and application of the present invention through specific examples, and it is by no means intended to limit the protection scope of the present invention to these specific embodiments. In fact, the real value of the present invention lies in the technical ideas and innovations it proposes, rather than its form of expression or means of implementation.

[0052] For ordinary technicians in the relevant technical field, after in-depth reading and understanding of the technical solution of the present invention, they are fully capable of making various forms of changes, modifications or equivalent substitutions to the specific implementation methods of the invention based on their own professional knowledge and skills. These changes may include but are not limited to: adjusting the value range of technical parameters, optimizing algorithm processes to improve efficiency, replacing some technical components to achieve better compatibility or reduce costs, etc. As long as these changed technical solutions still substantially maintain the technical features claimed for protection by the original invention, that is, they can still achieve the core functions and effects of the present invention, then these changes should be deemed to fall within the scope of protection of the pending claims of the present invention.

[0053] In addition, with the continuous progress and development of technology, new technical means and methods continue to emerge, which also provides broad space for further improvement and perfection of the present invention. Therefore, the protection scope of the present invention should also include those reasonably foreseeable improvements and extensions based on the existing technology. As long as these improvements and extensions do not deviate from the basic principles and core concepts of the present invention, they should be regarded as equivalents of the present invention and are also protected by patent rights.

Claims

1. A charging pile, characterized in that: It includes auxiliary fan units, controllers, several fan units, several temperature sensors and several AC / DC modules; The AC / DC module is installed in the charging pile. The position layout of the fan unit corresponds to the AC / DC module one by one. Each AC / DC module contains several AC / DC modules. The auxiliary fan unit is located outside the AC / DC module in the charging pile. A temperature sensor is set in the area of ​​each AC / DC module. The temperature sensor is electrically connected to the controller and is used to collect the real-time temperature of the corresponding AC / DC module area and send it to the controller when the charging pile is charging; the controller is electrically connected to each fan group respectively to start and stop the corresponding fan group; the controller is electrically connected to the auxiliary fan group to start and stop the auxiliary fan group.

2. A charging pile according to claim 1, characterized in that: Each fan group includes several fans connected in series, and the position layout of the fans corresponds one-to-one to the AC / DC modules.

3. A charging pile according to claim 1, characterized in that: It also includes a vehicle networking platform, and the controller is electrically connected to the vehicle networking platform.

4. A charging pile according to claim 1, characterized in that: The charging power of the charging pile is 480KW, there are three AC / DC modules, each AC / DC module contains four AC / DC modules, the charging power of each AC / DC module is 40KW, and there are three fan units.

5. A charging pile fan control method, characterized in that: The charging pile according to claim 1 comprises the following steps: Based on the number of AC / DC modules contained in each AC / DC module and the corresponding temperature, the start and stop status of the fan group is controlled; based on the number of AC / DC modules contained in all AC / DC modules and the corresponding temperature, the start and stop status of the auxiliary fan group is controlled.

6. A charging pile fan control method according to claim 5, characterized in that: Controlling the start and stop status of the fan unit includes the following steps: Perform the following operations for each AC / DC module: obtain the total number m of AC / DC modules included in the AC / DC module, preset the critical temperature T of the AC / DC module, and obtain the real-time temperature t of each AC / DC module area. 1~m , get the real-time temperature t 1~m The number x of the samples that are greater than the critical temperature T; When x< Or real-time temperature t 1~m When the highest temperature in is ≤T-8℃, the condition of triggering the corresponding fan group to shut down is reached, and the controller sends an instruction to control the fan group corresponding to the AC / DC module to be in the shut-down state; when x≥ When the condition for triggering the corresponding fan group to start is met, the controller sends an instruction to control the fan group corresponding to the AC / DC module to be in the on state; In other cases, the fan unit maintains the current status unchanged.

7. A charging pile fan control method according to claim 6, characterized in that: Controlling the start and stop status of the auxiliary fan group includes the following steps: Get the total number of AC / DC modules n, including the total number of AC / DC modules, and get the real-time temperature t of all AC / DC module areas 1~n , get the real-time temperature t 1~n The number of z values ​​greater than T-5℃ in the sample is used to obtain the real-time temperature t 1~n The number X of the particles with a temperature greater than the critical temperature T; When X ≥ Or z> When X< Or real-time temperature t 1~ When the highest temperature in is ≤T-10℃, the condition for triggering the auxiliary fan unit to be turned off is reached, and the controller sends a command to control the auxiliary fan unit to be turned off; In other cases, the auxiliary fan unit maintains the current state unchanged.

8. A charging pile fan control method according to claim 7, characterized in that: The critical temperature T is 40°C.

9. A charging pile fan control method according to claim 7, characterized in that: The following steps are also included: When the conditions for triggering the corresponding fan group to be turned on or off are met, the controller records the time Time that the AC / DC module maintains the current state. When Time < 5 min, the controller does not act; when Time ≥ 5 min, the controller issues a command; When the conditions for triggering the auxiliary fan group to turn on or off are met, the controller records the time Time that all AC / DC modules maintain the current state. When Time is less than 5 min, the controller does not act; when Time is greater than or equal to 5 min, the controller sends corresponding instructions to the corresponding fan group.

10. A control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 3 to 9 are implemented.

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