Fan control system and control method thereof

Abstract

The invention discloses a fan control system and a control method thereof, and the fan control system comprises an addressing module which is used for obtaining a coded address of a fan, and enabling the fan to establish communication connection with the fan control system; the data acquisition module is used for acquiring the environment temperature of the environment where the fan is located; the rotating speed calculation module is used for determining the target rotating speed of the fan according to the environment temperature; the rotating speed control module is used for controlling the rotating speed of the fan according to the target rotating speed. According to the scheme, the process of controlling the rotating speed of the fan in the fan control system is automated, and the air volume of the fan is adjusted in real time according to the environment temperature, so that the system cost is reduced, the control accuracy of the rotating speed of the fan is improved, and the system operation efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the field of control technology, and in particular relates to a fan control system and a control method thereof. Background Art

[0002] With the development of ventilation technology, the requirements for intelligence and energy saving in the industrial air supply industry are becoming increasingly higher. With the introduction of new energy efficiency requirements, traditional AC fans are gradually being replaced by energy-saving, high-efficiency, and intelligently integrated EC fans. EC fans are beginning to replace AC fans in livestock and poultry units.

[0003] EC fans send control instructions to EC fans by adjusting 0-10V analog quantity and RS485 communication instructions, thereby controlling the speed of EC fans and controlling the temperature in the livestock and poultry unit. However, the functions of the EC fan control system are single, and usually the temperature in the livestock and poultry unit is monitored and controlled by equipment such as heating and cooling attendants in turn. There are problems such as high cost, nonlinear adjustment of air volume adjustment curve, inability to accurately control the speed of EC fans, and inability to give full play to the speed regulation advantages of EC fans.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The object of the present invention is to provide a fan control system and a control method thereof, so as to solve the problem that the EC fan control system in the related scheme has a single function and an inaccurate speed control, so as to achieve the effect of reducing system cost, improving the accuracy of fan speed control, and improving system operation efficiency by automating the process of controlling the fan speed in the fan control system and adjusting the fan air volume in real time according to the ambient temperature.

[0006] The present invention provides a fan control system, comprising: an addressing module, used to obtain a coding address of a fan so that the fan establishes a communication connection with the fan control system; a data acquisition module, used to obtain the ambient temperature of the environment in which the fan is located; a speed calculation module, used to determine a target speed of the fan according to the ambient temperature; and a speed control module, used to control the speed of the fan according to the target speed.

[0007] In some embodiments, the fan control system also includes an adjusting knob; the adjusting knob is used to adjust the size of the analog quantity output by the fan control system; the speed control module is also used to control the speed of the fan according to the analog quantity; wherein the size of the analog quantity corresponds to the speed of the fan.

[0008] In some embodiments, the fan control system also includes an analog output port and a serial port; the fan control system is connected to the fan through the analog output port and the serial port respectively; the serial port is used for bidirectional data transmission between the fan and the fan control system; the analog output port is used for the fan control system to transmit data to the fan.

[0009] In some embodiments, the fan control system has an automatic control mode and a manual control mode; in the automatic control mode, the speed control module controls the speed of the fan according to the target speed; in the manual control mode, the speed control module controls the speed of the fan according to the analog quantity.

[0010] In some embodiments, the speed calculation module determines the target speed of the fan according to the ambient temperature, including: recording the difference between the ambient temperature and the preset target temperature as the temperature difference, and judging the size of the temperature difference; if the temperature difference is within a first range, determining the target speed of the fan to be the first target speed; if the temperature difference is within a second range, determining the target speed of the fan to be the second target speed; the first range>the second range, the first target speed>the second target speed.

[0011] In some embodiments, the wind turbine control system has a one-key addressing function; the one-key addressing function is used to enable the addressing module to obtain the coded addresses of all the wind turbines connected to the wind turbine control system.

[0012] In some implementations, the fan control system further has a fault query function; the fault query function is used to query the fault type when a fault occurs in the fan.

[0013] In some embodiments, the fan control system also includes a display interface; the display interface is used to display the current speed of the fan, the target speed of the fan, the analog quantity, the fault type of the fan, the coding address of the fan, and the ambient temperature.

[0014] Matching the above-mentioned fan control system, the present invention provides a control method for a fan control system on the other hand, including: obtaining the control mode of the fan, the ambient temperature of the environment in which the fan is located, and the analog quantity corresponding to the knob; when the control mode is the automatic control mode, controlling the speed of the fan according to the ambient temperature; when the control mode is the manual control mode, controlling the speed of the fan to be a target speed, and the target speed is the speed of the fan corresponding to the analog quantity corresponding to the knob.

[0015] In some embodiments, controlling the speed of the fan according to the ambient temperature includes: recording the difference between the ambient temperature and the preset target temperature as the temperature difference, and determining the size of the temperature difference; if the temperature difference is within a first range, controlling the speed of the fan to be a first target speed; if the temperature difference is within a second range, controlling the speed of the fan to be a second target speed; the first range > the second range, the first target speed > the second target speed.

[0016] In the scheme of the present invention, the fan control system includes an addressing module, a data acquisition module, a speed calculation module, and a speed control module; the addressing module is used to obtain the coding address of the fan, so that the fan and the fan control system establish a communication connection; the data acquisition module is used to obtain the ambient temperature of the environment in which the fan is located; the speed calculation module is used to determine the target speed of the fan according to the ambient temperature; and the speed control module is used to control the speed of the fan according to the target speed. Thus, by automating the process of controlling the fan speed in the fan control system, the fan air volume is adjusted in real time according to the ambient temperature, thereby reducing the system cost, improving the accuracy of the fan speed control, and improving the system operation efficiency.

[0017] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an embodiment of a fan control system of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection between the fan and the fan control system;

[0021] Figure 3 It is a schematic diagram of the components of the fan control system;

[0022] Figure 4 It is a schematic diagram of the appearance structure of the fan control system;

[0023] Figure 5 This is a schematic diagram of the main page of the fan control system;

[0024] Figure 6 This is a schematic diagram of the setting page of the fan control system;

[0025] Figure 7 This is a schematic diagram of the parameter setting page of the fan control system;

[0026] Figure 8This is a schematic diagram of the instruction setting page of the fan control system;

[0027] Fig. 9 The figure is a flow chart of an embodiment of a control method of a fan control system of the present invention.

[0028] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0029] 1-EC fan; 2-fan control system; 3-temperature sensing line; 4-EC fan control line; 5-analog output port and serial port; 6-knob; 7-power switch; 8-charging port; 9-communication exchange indicator light. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0031] According to an embodiment of the present invention, a fan control system is provided. Figure 1 As shown, the fan control system includes: an addressing module, a data acquisition module, a speed calculation module, and a speed control module.

[0032] The addressing module is used to obtain the coded address of the fan so that the fan can establish a communication connection with the fan control system.

[0033] The addressing module is specifically used to automatically obtain the coded address of the fan connected to the fan control system. After obtaining the coded address of the fan, the obtained coded address is compared with the address requirements set in the fan control system. The fan that meets the requirements is the fan to be controlled by the fan control system, so that the fan and the fan control system establish a communication connection. The communication uses the modbus-RS485 bus protocol.

[0034] The data acquisition module is used to obtain the ambient temperature of the environment in which the fan is located.

[0035] The fan control system can obtain the ambient temperature of the fan environment through the temperature sensing line, which can be the ambient temperature inside the livestock and poultry unit. Figure 2 As shown, the acquisition end of the temperature sensing line 3 extending from the fan control system 2 is set at the EC fan 1 to obtain the temperature of the environment in which the fan is located. The data acquisition module can also obtain information such as the current wind speed and ambient humidity of the fan.

[0036] The speed calculation module is used to determine the target speed of the fan according to the ambient temperature.

[0037] The higher the speed of the EC fan, the stronger the heat dissipation effect and the lower the ambient temperature. Therefore, the fan control system can automatically adjust the fan speed according to the relationship between the acquired ambient temperature and the set temperature, so that the ambient temperature is equal to the set temperature.

[0038] In some embodiments, the speed calculation module determines the target speed of the fan according to the ambient temperature, including: recording the difference between the ambient temperature and the preset target temperature as the temperature difference, and judging the size of the temperature difference; if the temperature difference is within a first range, determining the target speed of the fan to be the first target speed; if the temperature difference is within a second range, determining the target speed of the fan to be the second target speed; the first range>the second range, the first target speed>the second target speed.

[0039] In the automatic control mode, the target temperature T2 can be set, and the signal type of the automatic control output can be selected according to the type of EC fan. Then, the target speed of the fan is determined according to the ambient temperature T1 and the target temperature T2, and the fan speed is controlled. Specifically, if T1-T2≥5℃, the system will issue a command corresponding to the rated speed of the EC fan, and keep running at the rated speed. The target speed is the rated speed; if 5℃>T1-T2≥3℃, the target speed is 0.7 times the rated speed; if 3℃>T1-T2≥1℃, the target speed is 0.5 times the rated speed; if T1-T2<1℃, the target speed is 0.3 times the rated speed, and the ventilation volume can be maintained.

[0040] By automatically determining the target speed of the fan according to the ambient temperature, the ambient temperature can be regulated, reducing the number of human operations, lowering costs and improving control efficiency.

[0041] A speed control module is used to control the speed of the fan according to the target speed.

[0042] like Figure 2 As shown, the fan control system 2 is connected to the EC fan 1 through the EC fan control line 4, so that the target speed is sent to the fan, so that the fan runs at the target speed. The fan control system automatically obtains the ambient temperature and automatically adjusts the fan speed according to the ambient temperature so that the temperature in the livestock unit reaches the set temperature, thereby improving the linearity of the wind speed and wind pressure regulation of the EC fan, making the fan control process more accurate, reducing the deviation of temperature control, and improving the comfortable experience of temperature regulation.

[0043] In some embodiments, Figure 3As shown, the fan control system includes: a serial port (input) port, an analog output port and an RS485 (serial port output) port, a control chip circuit, a touch screen, a battery, a charging port, and a knob. The serial port input port is used to obtain data, including the temperature and humidity of the environment in which the fan is located, the current speed of the fan, the fault information of the fan, etc. The RS485 serial port output port is used to output data such as speed control signals to the fan, specifically the target speed sent by the fan control system to the fan when the fan is automatically controlled. The touch screen is used for users to operate the fan control system, display system information and fan information, etc. The charging port is used to charge the battery, so that the fan control system does not need to be fixed in a certain position, and the position of the control system can be freely set according to the position of the fan, thereby improving the freedom of use; it can also be powered by charging, so that the fan control system can work under the condition of external input power.

[0044] like Figure 4 The structure of the wind turbine control system shown includes an analog output port and a serial port 5, a knob 6, a power switch 7, a charging port 8, and a communication exchange indicator light 9. The middle area is a touch screen. The analog output port and the serial port 5 are used to connect to the wind turbine via a wire, and are used for serial port input, serial port output, and analog output. The communication exchange indicator light 9 is used to indicate the state of data interaction. For example, when the indicator light is red, it means that the wind turbine control system is sending data, and when the indicator light is green, it means that the wind turbine control system is receiving data.

[0045] In some embodiments, the fan control system further includes an adjustment knob, such as Figure 4 The knob 6 in the fan control system is used to adjust the analog value output by the fan control system, so that the user can manually control the fan speed by rotating the knob to adjust the analog value. The analog value adjusted by the knob is a DC voltage with a range of 0 to 10V. The fan can adjust its own speed according to the analog value.

[0046] The speed control module is further used to control the speed of the fan according to the analog quantity; wherein the analog quantity and the speed of the fan are in a linear function relationship, and the size of the analog quantity corresponds to the speed of the fan.

[0047] In some embodiments, the fan control system further includes an analog output port and a serial port; the fan control system is connected to the fan through the analog output port and the serial port respectively; the serial port is used for bidirectional data transmission between the fan and the fan control system, including the ambient temperature of the environment in which the fan is located and the target speed of the fan. The serial port includes a serial input port and a serial output port, the serial input port is used for the fan to transmit data to the fan control system, and the serial output port is used for the fan control system to transmit data to the fan. The analog output port is used for the fan control system to transmit data to the fan, including the analog quantity.

[0048] In some embodiments, the fan control system also includes a display interface; the display interface is used to display the current speed of the fan, the target speed of the fan, the analog quantity, the fault type of the fan, the coding address of the fan, and the ambient temperature.

[0049] The interactive main page of the fan control system is as follows: Figure 5 As shown, the upper area of ​​the page displays the data received and sent by the fan control system, and counts the number of data for each. The lower area of ​​the page can display the original address of the fan, the device model of the fan, the target address of the data sent, the ambient temperature, and the size of the analog quantity (voltage); you can also query the current speed of the fan and the type of fault when a fault occurs, such as: overvoltage, undervoltage, overcurrent, overload, phase loss, stall, etc. The one-key addressing button is used for the fan control system to obtain the coded address of all fans connected to it. Free instructions are used to edit control instructions issued to the fan.

[0050] When the control signal line of the EC fan with RS485 communication control type is connected to the 485 output port of the fan control system, the user's operation sequence on the main page is as follows: (1) Select the device model, such as #EC1100 (EC750 / EC1500 / EC1800 / EC2200); (2) Enter the address in the original address box, such as 1, 2 / 3...; (3) Set the target speed, and then click the send button to make the fan speed the target speed. When the user clicks the stop button, the speed of the EC fan is set to zero.

[0051] When coding the EC fan, the user can change the code. For example, if the requirement is to change from 1 to 15, then Figure 5Enter 15 in the target address box on the main page, click the send button on the right side of the target address box, and send the address change command 01061000000F CRC16 to the EC fan. If the EC fan receives the command and returns the correct reply command 01061000000F CRC16 according to the command, the control system prompts that the change is successful on the page, and the font is green; if the EC fan does not receive the command, or the command returns the correct but illogical 0106CRC16, the control system prompts that the change failed on the page, and the font is red.

[0052] When the user clicks Figure 5 After clicking the Settings button at the bottom of the main page, enter Figure 6 On the setting page shown, the user can set communication parameters, edit sending parameters, and switch between manual control mode and automatic control mode; in automatic control mode, set the target temperature and associate the temperature with the RS485 protocol and analog output.

[0053] In some embodiments, the fan control system has an automatic control mode and a manual control mode. Figure 5 As shown, the automatic / manual button is used to switch between automatic control mode and manual control mode.

[0054] In the automatic control mode, the speed control module controls the speed of the fan according to the target speed, that is, automatically collects the ambient temperature, and automatically adjusts the fan speed according to the ambient temperature to make the ambient temperature equal to the set temperature.

[0055] In the manual control mode, the speed control module controls the speed of the fan according to the analog quantity. The user can adjust the size of the analog quantity by rotating the knob. The analog quantity is a voltage value. After the fan control system transmits the analog quantity to the fan, the fan can automatically change its own speed according to the size of the analog quantity, so that the user can manually adjust the fan speed.

[0056] When the user clicks Figure 6 After pressing the parameter button in the setting page, enter Figure 7The parameter setting page shown is where users can set the baud rate, data bit, parity bit, stop bit and parity mode based on their needs. For example, the baud rate can be set to 100, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 56000, 57600, 115200, 128000, 230400, 25600, 460800, 500000, 512000, 600000, 750000, 921600, 1000000, 1500000, 2000000; the data bit can be set to 5, 6, 7, 8; the check bit can be set to none, odd, even; the stop bit can be set to 1, 1.5, 2; the check mode can be selected from CRC check, sum check, CRC32, None, add8, add16.

[0057] When the user clicks Figure 5 After pressing the free command button on the main page, enter Figure 8 The instruction setting page shown in the figure can be used to edit the required instructions, which are stored in free instructions 1-7. For example, free instruction 1 is set to 0110500000010320CRC16, and then click Figure 5 The send button on the main page sends free command 1 to the fan.

[0058] In some embodiments, the fan control system has a one-key addressing function corresponding to Figure 5 The one-key addressing button in the fan control system; the one-key addressing function is used to enable the addressing module to obtain the coding addresses of all the fans connected to the fan control system, so that the fan control system can automatically find the target fan to be controlled from the multiple fans connected to it. Specifically, it searches for the corresponding coding address when the fan coding address cannot be clearly determined. For example, the fan control system starts by issuing the 0103 1207 0001CRC16 instruction, and gradually switches to 02 03 1207 0001CRC16, all the way to 03 04...255, until all address intervals are traversed. If the EC fan that meets the address requirements is captured, the fan code No. 15 can be found by replying 0F 0302000F CRC16.

[0059] If the fan control system is connected to multiple EC fans and multiple fan codes need to be found, all address intervals can be traversed with one key, and the captured other codes 16 (10), 17 (11) ... can also be displayed at the same time to meet the needs of multiple device code searches.

[0060] The one-click addressing function can quickly establish connections between multiple fans and the fan control system without manual intervention, greatly shortening the connection time, reducing the configuration workload, improving the connection efficiency, and reducing the connection failures caused by configuration errors or network problems. When the network environment changes, the one-click addressing function can re-find and connect to available devices, improve fault tolerance, and facilitate management and maintenance.

[0061] In some embodiments, the fan control system also has a fault query function, corresponding to Figure 5 The fault query button in the fan; the fault query function is used to query the fault type when the fan fails. Specifically, when the fan fails, a corresponding instruction will be returned to the fan control system according to the fault type. The fan control system determines that the fan has a fault and the fault type according to the returned instruction, and displays the fault information and fault type on the main page when the user clicks the fault query button.

[0062] The technical solution of this embodiment is adopted, and the fan control system includes an addressing module, a data acquisition module, a speed calculation module, and a speed control module; the addressing module is used to obtain the coding address of the fan, so that the fan and the fan control system establish a communication connection; the data acquisition module is used to obtain the ambient temperature of the environment in which the fan is located; the speed calculation module is used to determine the target speed of the fan according to the ambient temperature; and the speed control module is used to control the speed of the fan according to the target speed. Thus, by automating the process of controlling the fan speed in the fan control system, the fan air volume is adjusted in real time according to the ambient temperature, thereby reducing the system cost, improving the accuracy of the fan speed control, and improving the system operation efficiency.

[0063] According to an embodiment of the present invention, a control method corresponding to a wind turbine control system is also provided. Fig. 9 As shown, the control method may include: step S110 to step S130.

[0064] In step S110, the control mode of the fan, the ambient temperature of the environment in which the fan is located, and the analog value corresponding to the knob are obtained.

[0065] After the fan is connected to the fan control system, the control mode of the fan is first selected, including automatic control mode and manual control mode. Then different speed control strategies are executed according to the control mode.

[0066] In step S120, when the control mode is the automatic control mode, the rotation speed of the fan is controlled according to the ambient temperature.

[0067] In some embodiments, in step S120, the specific process of controlling the speed of the fan according to the ambient temperature includes: recording the difference between the ambient temperature and the preset target temperature as the temperature difference, and judging the size of the temperature difference; if the temperature difference is in a first range, controlling the speed of the fan to be a first target speed; if the temperature difference is in a second range, controlling the speed of the fan to be a second target speed; the first range>the second range, the first target speed>the second target speed.

[0068] In the automatic control mode, the target temperature T2 can be set, and the signal type of the automatic control output can be selected according to the type of EC fan. Then, the target speed of the fan is determined according to the ambient temperature T1 and the target temperature T2, and the fan speed is controlled. Specifically, if T1-T2≥5℃, the system will issue a command corresponding to the rated speed of the EC fan, and keep running at the rated speed. The target speed is the rated speed; if 5℃>T1-T2≥3℃, the target speed is 0.7 times the rated speed; if 3℃>T1-T2≥1℃, the target speed is 0.5 times the rated speed; if T1-T2<1℃, the target speed is 0.3 times the rated speed, and the ventilation volume can be maintained.

[0069] In step S130, when the control mode is the manual control mode, the rotation speed of the fan is controlled to be a target rotation speed, and the target rotation speed is the rotation speed of the fan corresponding to the analog value corresponding to the knob.

[0070] Through automatic and manual control of the fan speed, a variety of control methods are realized. In the automatic control mode, the consumption of human resources can be reduced, and the control efficiency and accuracy can be improved; in the manual control mode, the fan speed can be controlled in a targeted manner, allowing users to adjust the fan speed more intuitively and control more flexibly.

[0071] The technical solution of this embodiment is adopted, and the fan control system includes an addressing module, a data acquisition module, a speed calculation module, and a speed control module; the addressing module is used to obtain the coding address of the fan, so that the fan and the fan control system establish a communication connection; the data acquisition module is used to obtain the ambient temperature of the environment in which the fan is located; the speed calculation module is used to determine the target speed of the fan according to the ambient temperature; and the speed control module is used to control the speed of the fan according to the target speed. Thus, by automating the process of controlling the fan speed in the fan control system, the fan air volume is adjusted in real time according to the ambient temperature, thereby reducing the system cost, improving the accuracy of the fan speed control, and improving the system operation efficiency.

[0072] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0073] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A fan control system, characterized in that: include: An addressing module, used for obtaining a coding address of a fan, so that the fan establishes a communication connection with the fan control system; A data acquisition module, used to obtain the ambient temperature of the environment in which the fan is located; A speed calculation module, used to determine a target speed of the fan according to the ambient temperature; A speed control module is used to control the speed of the fan according to the target speed.

2. The fan control system according to claim 1, characterized in that: The fan control system also includes an adjustment knob; the adjustment knob is used to adjust the size of the analog quantity output by the fan control system; The speed control module is further used to control the speed of the fan according to the analog quantity; wherein the magnitude of the analog quantity corresponds to the speed of the fan.

3. The fan control system according to claim 1 or 2, characterized in that: The fan control system also includes an analog output port and a serial port; The fan control system is connected to the fan through the analog output port and the serial port respectively; The serial port is used for bidirectional data transmission between the fan and the fan control system; The analog output port is used by the fan control system to transmit data to the fan.

4. The fan control system according to claim 2, characterized in that: The fan control system has an automatic control mode and a manual control mode; In the automatic control mode, the speed control module controls the speed of the fan according to the target speed; In the manual control mode, the speed control module controls the speed of the fan according to the analog quantity.

5. The fan control system according to claim 1 or 4, characterized in that: The speed calculation module determines the target speed of the fan according to the ambient temperature, including: Recording the difference between the ambient temperature and the preset target temperature as a temperature difference, and determining the magnitude of the temperature difference; If the temperature difference is within a first range, determining the target speed of the fan to be a first target speed; If the temperature difference is within the second range, the target speed of the fan is determined to be the second target speed; the first range>the second range, the first target speed>the second target speed.

6. The fan control system according to any one of claims 1 to 5, characterized in that: The fan control system has a one-key addressing function; the one-key addressing function is used to enable the addressing module to obtain the coded addresses of all the fans connected to the fan control system.

7. The fan control system according to any one of claims 1 to 5, characterized in that: The fan control system also has a fault query function; the fault query function is used to query the fault type when a fault occurs in the fan.

8. The fan control system according to any one of claims 1 to 5, characterized in that: The fan control system also includes a display interface; the display interface is used to display the current speed of the fan, the target speed of the fan, the analog quantity, the fault type of the fan, the coding address of the fan, and the ambient temperature.

9. A control method for a fan control system, characterized in that: The fan control system according to any one of claims 1 to 8 comprises: Obtaining the control mode of the fan, the ambient temperature of the environment in which the fan is located, and the analog value corresponding to the knob; When the control mode is the automatic control mode, controlling the speed of the fan according to the ambient temperature; When the control mode is the manual control mode, the rotation speed of the fan is controlled to be a target rotation speed, and the target rotation speed is the rotation speed of the fan corresponding to the analog quantity corresponding to the knob.

10. The control method of the fan control system according to claim 9, characterized in that: Controlling the speed of the fan according to the ambient temperature includes: Recording the difference between the ambient temperature and the preset target temperature as a temperature difference, and determining the magnitude of the temperature difference; If the temperature difference is within a first range, controlling the speed of the fan to be a first target speed; If the temperature difference is within the second range, the rotation speed of the fan is controlled to be the second target rotation speed; the first range>the second range, the first target rotation speed>the second target rotation speed.

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