Fan heat dissipation control system

Abstract

The invention provides a fan heat dissipation control system, and relates to the technical field of fan heat dissipation, the system comprises a main control chip, a drive circuit, an anti-crash circuit and a fan, the anti-crash circuit and the drive circuit are both connected with the main control chip, and the drive circuit is further connected with the anti-crash circuit and the fan; the main control chip is used for generating a running state signal; the anti-crash circuit is used for determining a driving selection circuit based on an operation state signal sent by the main control chip, and the driving selection circuit comprises the main control chip or the anti-crash circuit; the driving selection circuit is used for generating a target driving signal; and the driving circuit is used for controlling the fan to dissipate heat based on the target driving signal. According to the technical scheme, under the condition that the main control chip cannot be restarted due to damage or in the restarting process of the main control chip, the anti-crash circuit can generate the target driving signal, and then the driving circuit can control the fan to dissipate heat based on the target driving signal generated by the anti-crash circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of fan heat dissipation, and in particular to a fan heat dissipation control system. Background Art

[0002] Fan cooling control systems are often used in electronic devices or computer hardware. Their purpose is to control the temperature of the electronic device or computer hardware by adjusting the speed and operating status of the fan to ensure that the electronic device or computer hardware operates within a safe operating temperature range.

[0003] In the existing fan cooling control system, if the main control chip in the fan cooling control system crashes, the system needs to be restarted, and the fan cannot work normally during the restart process. In addition, if the main control chip is damaged, there may be a restart failure, in which case the fan will stop working. Summary of the invention

[0004] The present invention provides a fan heat dissipation control system, method, device, equipment, medium and program to solve the defect in the prior art that the fan will directly stop rotating when the main control chip cannot work, and realize that when the main control chip cannot work, the anti-crash circuit can control the fan to rotate.

[0005] The present invention provides a fan heat dissipation control system, comprising a main control chip, a drive circuit, an anti-freeze circuit and a fan, wherein the anti-freeze circuit and the drive circuit are both connected to the main control chip, and the drive circuit is also respectively connected to the anti-freeze circuit and the fan; The main control chip is used to generate an operation status signal; The anti-crash circuit is used to determine the drive selection circuit based on the operation status signal sent by the main control chip, and the drive selection circuit includes the main control chip or the anti-crash circuit; the drive selection circuit is used to generate a target drive signal; The driving circuit is used to control the fan to dissipate heat based on the target driving signal.

[0006] According to a fan heat dissipation control system provided by the present invention, the anti-crash circuit includes a switch circuit, an energy storage circuit and a relay, wherein: The first end of the switch circuit is connected to the output end of the main control chip, and the second end of the switch circuit is connected to the first end of the energy storage circuit; the third end of the switch circuit is connected to the second end of the energy storage circuit, and both are grounded; the operation status signal is used to control the on-off state of the switch circuit; The third end of the energy storage circuit is connected to the negative pole of the coil in the relay; the fourth end of the energy storage circuit is connected to the positive pole of the coil, and both are grounded; the energy storage circuit is used to control the power-on state of the coil based on the on-off state of the switch circuit; The selection switch in the relay is connected to the power supply and the drive circuit respectively, and the selection switch is used to determine the drive selection circuit corresponding to the drive circuit based on the power-on state of the coil.

[0007] According to a fan heat dissipation control system provided by the present invention, the operation status signal includes a PWM (Pulse Width Modulation) wave; In the case where the operating status signal is the PWM wave, the anti-crash circuit determines that the drive selection circuit corresponding to the drive circuit includes a main control chip.

[0008] According to a fan heat dissipation control system provided by the present invention, the operation status signal also includes a non-PWM wave; In the case that the operation status signal is the non-PWM wave, the anti-crash circuit determines that the drive selection circuit corresponding to the drive circuit includes an anti-crash circuit.

[0009] According to a fan heat dissipation control system provided by the present invention, the energy storage circuit includes a first energy storage circuit and a second energy storage circuit, wherein: The first end of the first energy storage circuit serves as the first end of the energy storage circuit, the second end of the first energy storage circuit serves as the second end of the energy storage circuit, the third end of the first energy storage circuit is connected to the first end of the second energy storage circuit, and the fourth end of the first energy storage circuit is connected to the second end of the second energy storage circuit; The third end of the second energy storage circuit serves as the third end of the energy storage circuit, and the fourth end of the second energy storage circuit serves as the fourth end of the energy storage circuit.

[0010] According to a fan heat dissipation control system provided by the present invention, when the operating status signal includes a PWM wave, the first energy storage circuit and the second energy storage circuit are used to alternately energize the coil based on the on-off state of the switch circuit.

[0011] According to a fan heat dissipation control system provided by the present invention, the switch circuit includes a first switch subcircuit and a second switch subcircuit; The first end of the first switch subcircuit serves as the first end of the switch circuit, the second end of the first switch subcircuit is connected to the first end of the second switch subcircuit, the third end of the first switch subcircuit serves as the second end of the switch circuit, and the fourth end of the first switch subcircuit serves as the third end of the switch circuit; The second end of the second switch sub-circuit serves as the second end of the switch circuit.

[0012] According to a fan heat dissipation control system provided by the present invention, the fan heat dissipation control system further comprises a watchdog circuit, and the watchdog circuit is connected to the main control chip; The watchdog circuit is used for generating a reset signal when the operation status signal includes a non-PWM wave; The main control chip is used for resetting and restarting based on the reset signal.

[0013] According to a fan heat dissipation control system provided by the present invention, the fan heat dissipation control system further includes a temperature sensor; The temperature sensor is used to detect the ambient temperature; The main control chip is also used to generate a target driving signal based on the ambient temperature.

[0014] According to a fan heat dissipation control system provided by the present invention, generating a target drive signal based on the ambient temperature includes: Determining a temperature difference between the ambient temperature and a preset temperature; A PID (Proportional Integral Derivative Control) algorithm is used to determine a target speed of the fan based on the temperature difference; The target drive signal is generated based on the target rotation speed.

[0015] The fan heat dissipation control system provided by the present invention includes: a main control chip, a drive circuit, an anti-freeze circuit and a fan, wherein the anti-freeze circuit and the drive circuit are both connected to the main control chip, and the drive circuit is also respectively connected to the anti-freeze circuit and the fan. The main control chip is used to generate an operating status signal; the anti-freeze circuit is used to determine the drive selection circuit based on the operating status signal sent by the main control chip, and the drive selection circuit includes the main control chip or the anti-freeze circuit; the drive selection circuit is used to generate a target drive signal; and the drive circuit is used to control the fan to dissipate heat based on the target drive signal. In the technical solution of the present invention, when the main control chip cannot be restarted due to damage, or when the main control chip is restarting, the anti-freeze circuit can generate a target drive signal, and then the drive circuit can control the fan to dissipate heat based on the target drive signal generated by the anti-freeze circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of the fan heat dissipation control system provided by the present invention.

[0018] Figure 2 This is one of the structural schematic diagrams of the anti-crash circuit provided by the present invention.

[0019] Figure 3 This is the second structural schematic diagram of the anti-crash circuit provided by the present invention.

[0020] Figure 4 This is the second structural schematic diagram of the fan heat dissipation control system provided by the present invention. DETAILED DESCRIPTION

[0021] 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 drawings of the present invention. Obviously, the described embodiments are 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.

[0022] In view of the above problems in the prior art, the present invention provides a fan heat dissipation control system. Figure 1 FIG. 1 is one of the structural schematic diagrams of the fan heat dissipation control system provided by the present invention. Figure 1 As shown, the fan heat dissipation control system includes: a main control chip, a drive circuit, an anti-freeze circuit and a fan, the anti-freeze circuit and the drive circuit are both connected to the main control chip, and the drive circuit is also connected to the anti-freeze circuit and the fan respectively; The main control chip is used to generate an operation status signal; The anti-crash circuit is used to determine the drive selection circuit based on the operation status signal sent by the main control chip, and the drive selection circuit includes the main control chip or the anti-crash circuit; the drive selection circuit is used to generate a target drive signal; The driving circuit is used to control the fan to dissipate heat based on the target driving signal.

[0023] Specifically, the main control chip is used to generate an operation status signal, and the main control chip is also used to send the generated operation status signal to the anti-crash circuit. The anti-crash circuit can receive the operation status signal sent by the main control chip, and then the anti-crash circuit can be used to determine the drive selection circuit based on the operation status signal sent by the main control chip. The drive selection circuit determined by the anti-crash circuit may include the main control chip or the anti-crash circuit.

[0024] The drive selection circuit is used to generate a target drive signal. It is easy to understand that when the drive selection circuit includes a main control chip, the target drive signal is generated by the main control chip, and the main control chip sends the target drive signal to the drive circuit. When the drive selection circuit includes an anti-crash circuit, the target drive signal is generated by the anti-crash circuit, and the anti-crash circuit sends the target drive signal to the drive circuit. And the target drive signal generated by the main control chip and the target drive signal generated by the anti-crash circuit may be the same or different.

[0025] The drive circuit can receive a target drive signal sent by the main control chip or the anti-crash circuit, and then the drive circuit can be used to control the fan to dissipate heat based on the target drive signal. The fan type can be one of the fan types such as a bladed fan, a bladeless fan and a tower fan, and the embodiment of the present invention is not specifically limited here.

[0026] In one embodiment, the anti-crash circuit includes a switch circuit, a storage circuit and a relay, wherein: The first end of the switch circuit is connected to the output end of the main control chip, and the second end of the switch circuit is connected to the first end of the energy storage circuit; the third end of the switch circuit is connected to the second end of the energy storage circuit, and both are grounded; the operation status signal is used to control the on-off state of the switch circuit; The third end of the energy storage switch is connected to the negative pole of the coil in the relay; the fourth end of the energy storage switch is connected to the positive pole of the coil, and both are grounded; the energy storage switch is used to control the power-on state of the coil based on the on-off state of the switch circuit; The selection switch in the relay is connected to the power supply and the drive circuit respectively, and the selection switch is used to determine the drive selection circuit corresponding to the drive circuit based on the power-on state of the coil.

[0027] Specifically, Figure 2 This is one of the structural schematic diagrams of the anti-crash circuit provided by the present invention, such as Figure 2 As shown, the anti-crash circuit includes a switch circuit, an energy storage circuit and a relay.

[0028] The first end of the switch circuit is connected to the output end of the main control chip, the second end of the switch circuit is connected to the first end of the energy storage circuit, and the third end of the switch circuit is connected to the second end of the energy storage circuit, and both are grounded. The operation status signal is used to control the on-off state of the switch circuit.

[0029] Furthermore, the third end of the energy storage circuit is connected to the negative pole of the coil in the relay, and the fourth end of the energy storage circuit is connected to the positive pole of the coil in the relay, and both are grounded. The energy storage circuit is used to control the energized state of the coil based on the on-off state of the switch circuit, and the energized state of the coil affects the selection switch in the relay.

[0030] The selection switch in the relay is connected to the power supply and the drive circuit respectively, and the selection switch is used to determine the drive selection circuit corresponding to the drive circuit based on the power-on state of the coil.

[0031] In the above embodiment, the anti-crash circuit includes a switching circuit, an energy storage circuit and a relay. The specific connection relationship between the switching circuit, the energy storage circuit and the relay ensures the normal operation of the anti-crash circuit and ensures that when the main control chip fails to work, the anti-crash circuit can control the fan for heat dissipation in a purely physical way.

[0032] In one embodiment, the operating status signal includes a PWM wave; In the case where the operating status signal is the PWM wave, the anti-crash circuit determines that the drive selection circuit corresponding to the drive circuit includes a main control chip.

[0033] Specifically, when the main control chip operates normally, the operating status signal generated by the main control chip is a PWM wave, which is a pulse width modulation wave and is a waveform of alternating high and low levels.

[0034] It is easy to understand that when the operating status signal includes a PWM wave, the relay continues to work, and the operation of the relay will affect the connection relationship of the selection switch in the relay, thereby determining that the drive selection circuit corresponding to the drive circuit includes the main control chip.

[0035] In the above embodiment, when the operating status signal includes a PWM wave, the circuit structure of the anti-freeze circuit can ensure that the relay works normally, thereby ensuring that the drive selection circuit corresponding to the drive circuit includes the main control chip, so that when the main control chip works normally, the anti-freeze circuit will not affect the main control chip's control of the fan.

[0036] In one embodiment, the operating status signal further includes a non-PWM wave; In the case that the operation status signal is the non-PWM wave, the anti-crash circuit determines that the drive selection circuit corresponding to the drive circuit includes an anti-crash circuit.

[0037] It is easy to understand that when the operating status signal includes a non-PWM wave, the relay will stop working, and the cessation of operation of the relay will restore the connection relationship of the selection switch in the relay to the default state, thereby determining that the drive selection circuit corresponding to the drive circuit includes the main control chip.

[0038] Furthermore, the power supply in the anti-freeze circuit will continuously output a voltage signal to the drive circuit (the voltage signal is the target drive signal when the drive selection circuit includes the anti-freeze circuit). For example, the power supply is 3.3 volts (V), and then the drive circuit will control the fan to dissipate heat with a 3.3V voltage. It is easy to understand that the voltage of the power supply can be preset as needed and is not limited to 3.3V.

[0039] In the above embodiment, when the operating status signal is a non-PWM wave, the anti-freeze circuit determines that the drive selection circuit corresponding to the drive circuit includes the anti-freeze circuit, which ensures that when the main control chip cannot work normally, the anti-freeze circuit can take over the control of the fan.

[0040] In one embodiment, the energy storage circuit includes a first energy storage circuit and a second energy storage circuit, wherein: The first end of the first energy storage circuit serves as the first end of the energy storage circuit, the second end of the first energy storage circuit serves as the second end of the energy storage circuit, the third end of the first energy storage circuit is connected to the first end of the second energy storage circuit, and the fourth end of the first energy storage circuit is connected to the second end of the second energy storage circuit; The third end of the second energy storage circuit serves as the third end of the energy storage circuit, and the fourth end of the second energy storage circuit serves as the fourth end of the energy storage circuit.

[0041] Specifically, Figure 3 This is the second structural schematic diagram of the anti-crash circuit provided by the present invention, such as Figure 3 As shown, the first end A3 of the first energy storage circuit serves as the first end A3 of the energy storage circuit, the second end A4 of the first energy storage circuit serves as the second end A4 of the energy storage circuit, the third end A5 of the first energy storage circuit is connected to the first end A5 of the second energy storage circuit, and the fourth end A6 of the first energy storage circuit is connected to the second end A6 of the second energy storage circuit.

[0042] The third terminal A7 of the second energy storage circuit serves as the third terminal A7 of the energy storage circuit, and the fourth terminal A8 of the second energy storage circuit serves as the fourth terminal A8 of the energy storage circuit.

[0043] In addition, the first energy storage circuit further includes a resistor R46, a capacitor C49, a diode D9 and a diode D10. The second energy storage circuit further includes a resistor R48, a capacitor C50, a resistor R49 and a diode D11.

[0044] In the above embodiment, the energy storage circuit includes a first energy storage circuit and a second energy storage circuit, and the specific connection relationship between them ensures the normal operation of the anti-crash circuit.

[0045] In one embodiment, when the operating status signal includes a PWM wave, the first energy storage circuit and the second energy storage circuit are used to alternately energize the coil based on the on-off state of the switch circuit.

[0046] Specifically, when the main control chip is operating normally, the operating state signal includes a PWM wave, and then the first energy storage circuit and the second energy storage circuit can be used to alternately energize the coil based on the on-off state of the switch circuit, and the frequency of the alternating energization depends on the duty cycle of the PWM wave. When the PWM wave is at a low level, the second energy storage circuit energizes the coil, and when the PWM wave is at a high level, the first energy storage circuit energizes the coil.

[0047] For example, Figure 3 As shown, when the operating state signal is a PWM wave, when the PWM wave is at a low level, the metal-oxide-semiconductor field-effect transistor (MOSFET, MOS tube for short) Q6 and MOS tube Q7 are turned off, MOS tube Q5 is turned on, and the 24V power supply is limited by a resistor and charges the capacitor C49 unidirectionally through the diode D8. When the PWM wave is at a high level, MOS tubes Q6 and MOS tubes Q7 are turned on, MOS tube Q5 is turned off, and capacitor C49 charges capacitor C50 through MOS tube Q7. At the same time, capacitor C49 uses the coil in relay RL1 as a load to drive relay RL1 to work. When the PWM wave is at a low level again, MOS tubes Q6 and MOS tubes Q7 are turned off, MOS tube Q5 is turned on, and the 24V power supply is limited by a resistor and charges capacitor C49 unidirectionally through the diode D8. Due to the theorem that the voltage across the capacitor cannot change suddenly, the voltage at the negative end of capacitor C50 is -24V, and capacitor C50 uses the coil in relay RL1 as a load to drive relay RL1 to work.

[0048] In addition, when the main control chip cannot operate normally, the operating status signal generated by the main control chip is a non-PWM wave, which is a continuous high level or a continuous low level. Figure 3As shown, when the operating state signal is a non-PWM wave, the charge and discharge logic of capacitor C49 and capacitor C50 does not hold. That is, there is a situation where only capacitor C49 is charged, capacitor C50 is briefly discharged, and capacitor C49 does not charge capacitor C50. After the electric energy of capacitor C50 is released, relay RL1 will stop working. Alternatively, there is a situation where only capacitor C49 charges capacitor C50, but does not charge capacitor C49. After the remaining electric energy in capacitor C49 is released, relay RL1 will stop working. In the above cases, relay RL1 cannot work normally, thereby affecting the connection relationship of the selection switch in relay RL1, so that the drive selection circuit corresponding to the drive circuit includes an anti-freeze circuit.

[0049] In the above embodiment, when the operating status signal includes a PWM wave, the first energy storage circuit and the second energy storage circuit are used to alternately energize the coil based on the on-off state of the switching circuit. The energization of the coil ensures the operation of the relay, so that when the main control chip works normally, the anti-crash circuit will not affect the main control chip's control of the fan.

[0050] In one embodiment, the switch circuit includes a first switch subcircuit and a second switch subcircuit; The first end of the first switch subcircuit serves as the first end of the switch circuit, the second end of the first switch subcircuit is connected to the first end of the second switch subcircuit, the third end of the first switch subcircuit serves as the second end of the switch circuit, and the fourth end of the first switch subcircuit serves as the third end of the switch circuit; The second end of the second switch sub-circuit serves as the second end of the switch circuit.

[0051] Specifically, Figure 3 As shown, the first end A1 of the first switch subcircuit serves as the first end A1 of the switch circuit, the second end A2 of the first switch subcircuit is connected to the first end A2 of the second switch subcircuit, the third end A3 of the first switch subcircuit serves as the second end A3 of the switch circuit, the fourth end A4 of the first switch subcircuit serves as the third end A4 of the switch circuit, and the second end A3 of the second switch subcircuit serves as the second end A3 of the switch circuit.

[0052] In addition, if Figure 3 As shown, the first terminal A1 of the first switch subcircuit is also connected to the optical coupler U12. The second terminal A2 of the first switch subcircuit is also connected to the diode D7. The third terminal A3 of the first switch subcircuit is also connected to the diode D8.

[0053] In the above embodiment, the energy storage circuit includes a switch circuit including a first switch sub-circuit and a second switch sub-circuit, and the specific connection relationship thereof ensures the normal operation of the anti-crash circuit.

[0054] In one embodiment, the fan heat dissipation control system further includes a watchdog circuit, and the watchdog circuit is connected to the main control chip; The watchdog circuit is used for generating a reset signal when the operation status signal includes a non-PWM wave; The main control chip is used for resetting and restarting based on the reset signal.

[0055] Specifically, Figure 4 This is the second structural diagram of the fan heat dissipation control system provided by the present invention. Figure 4 As shown, the watchdog circuit is connected to the main control chip.

[0056] Further, the main control chip sends the generated operating status signal to the watchdog circuit, and the watchdog circuit receives the operating status signal sent by the main control chip. In the case where the operating status signal includes a non-PWM wave, the watchdog circuit generates a reset signal and sends the reset signal to the main control chip. After receiving the reset signal, the main control chip is used to reset and restart based on the reset signal. In the case where the operating status signal includes a PWM wave, the watchdog circuit does not generate a reset signal.

[0057] In the above embodiment, when the operating status signal includes a non-PWM wave, the watchdog circuit generates a reset signal, and the main control chip resets and restarts based on the reset signal, so that the main control chip can be restarted in the event of a crash. If the restart is successful, it ensures that the main control chip can take over control of the fan again.

[0058] In one embodiment, the fan heat dissipation control system further includes a temperature sensor; The temperature sensor is used to detect the ambient temperature; The main control chip is also used to generate a target driving signal based on the ambient temperature.

[0059] Specifically, Figure 4 As shown, the fan heat dissipation control system also includes a temperature sensor. The temperature sensor can monitor the ambient temperature in real time and transmit the ambient temperature to the main control chip, and the main control chip can generate a target drive signal based on the ambient temperature.

[0060] In the above embodiment, the temperature sensor is used to detect the ambient temperature, and the main control chip is also used to generate a target drive signal based on the ambient temperature, so that the control of the fan by the main control chip can be adjusted according to the change of the ambient temperature, thereby improving the user experience.

[0061] In one embodiment, generating a target driving signal based on the ambient temperature includes: Determining a temperature difference between the ambient temperature and a preset temperature; Using a PID algorithm to determine a target speed of the fan based on the temperature difference; The target drive signal is generated based on the target rotation speed.

[0062] Specifically, the main control chip can determine the temperature difference between the ambient temperature and the preset temperature. The preset temperature is set in advance according to the needs. The embodiment of the present invention is not specifically limited here. The PID algorithm can be pre-learned in the main control chip. The PID algorithm is a widely used control algorithm. Its core idea is to control the output of the system by adjusting the three parameters of proportion, integration and differentiation to achieve precise control of the system behavior. Then the main control chip can use the PID algorithm to determine the target speed of the fan based on the temperature difference. For example, when the temperature difference is large, the target speed of the fan can be faster. Further, the main control chip can generate a target drive signal based on the target speed.

[0063] In the above embodiment, the main control chip determines the temperature difference between the ambient temperature and the preset temperature, and then adopts the PID algorithm to reasonably determine the target speed of the fan, thereby generating a target drive signal to control the fan to dissipate heat.

[0064] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fan heat dissipation control system, characterized in that: include: A main control chip, a driving circuit, an anti-freeze circuit and a fan, wherein the anti-freeze circuit and the driving circuit are both connected to the main control chip, and the driving circuit is also connected to the anti-freeze circuit and the fan respectively; The main control chip is used to generate an operation status signal; The anti-crash circuit is used to determine the drive selection circuit based on the operation status signal sent by the main control chip, and the drive selection circuit includes the main control chip or the anti-crash circuit; the drive selection circuit is used to generate a target drive signal; The driving circuit is used to control the fan to dissipate heat based on the target driving signal.

2. The fan heat dissipation control system according to claim 1, characterized in that: The anti-crash circuit includes a switch circuit, an energy storage circuit and a relay, wherein: The first end of the switch circuit is connected to the output end of the main control chip, and the second end of the switch circuit is connected to the first end of the energy storage circuit; the third end of the switch circuit is connected to the second end of the energy storage circuit, and both are grounded; the operation status signal is used to control the on-off state of the switch circuit; The third end of the energy storage circuit is connected to the negative pole of the coil in the relay; the fourth end of the energy storage circuit is connected to the positive pole of the coil, and both are grounded; the energy storage circuit is used to control the power-on state of the coil based on the on-off state of the switch circuit; The selection switch in the relay is connected to the power supply and the drive circuit respectively, and the selection switch is used to determine the drive selection circuit corresponding to the drive circuit based on the power-on state of the coil.

3. The fan heat dissipation control system according to claim 2, characterized in that: The operating status signal includes a PWM wave; In the case where the operating status signal is the PWM wave, the anti-crash circuit determines that the drive selection circuit corresponding to the drive circuit includes a main control chip.

4. The fan heat dissipation control system according to claim 2, characterized in that: The operating status signal also includes a non-PWM wave; In the case that the operation status signal is the non-PWM wave, the anti-crash circuit determines that the drive selection circuit corresponding to the drive circuit includes an anti-crash circuit.

5. The fan heat dissipation control system according to claim 3, characterized in that: The energy storage circuit comprises a first energy storage circuit and a second energy storage circuit, wherein: The first end of the first energy storage circuit serves as the first end of the energy storage circuit, the second end of the first energy storage circuit serves as the second end of the energy storage circuit, the third end of the first energy storage circuit is connected to the first end of the second energy storage circuit, and the fourth end of the first energy storage circuit is connected to the second end of the second energy storage circuit; The third end of the second energy storage circuit serves as the third end of the energy storage circuit, and the fourth end of the second energy storage circuit serves as the fourth end of the energy storage circuit.

6. The fan heat dissipation control system according to claim 5, characterized in that: In the case where the operating state signal includes a PWM wave, the first energy storage circuit and the second energy storage circuit are used to alternately energize the coil based on the on-off state of the switch circuit.

7. The fan heat dissipation control system according to any one of claims 2 to 6, characterized in that: The switch circuit comprises a first switch subcircuit and a second switch subcircuit; The first end of the first switch subcircuit serves as the first end of the switch circuit, the second end of the first switch subcircuit is connected to the first end of the second switch subcircuit, the third end of the first switch subcircuit serves as the second end of the switch circuit, and the fourth end of the first switch subcircuit serves as the third end of the switch circuit; The second end of the second switch sub-circuit serves as the second end of the switch circuit.

8. The fan heat dissipation control system according to claim 4, characterized in that: The fan heat dissipation control system further includes a watchdog circuit, which is connected to the main control chip; The watchdog circuit is used for generating a reset signal when the operation status signal includes a non-PWM wave; The main control chip is used for resetting and restarting based on the reset signal.

9. The fan heat dissipation control system according to any one of claims 1 to 6, characterized in that: The fan heat dissipation control system also includes a temperature sensor; The temperature sensor is used to detect the ambient temperature; The main control chip is also used to generate a target driving signal based on the ambient temperature.

10. The fan heat dissipation control system according to claim 9, characterized in that: The generating a target driving signal based on the ambient temperature comprises: Determining a temperature difference between the ambient temperature and a preset temperature; Using a PID algorithm to determine a target speed of the fan based on the temperature difference; The target drive signal is generated based on the target rotation speed.

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