Real-time heat dissipation control system and method applied to streaming media power amplifier equipment

Abstract

The invention provides a real-time heat dissipation control system applied to streaming media power amplifier equipment, a heat dissipation fan is configured in the streaming media power amplifier equipment, the system is used for controlling the running speed of the heat dissipation fan in real time according to the temperature of the streaming media power amplifier equipment, and the system comprises a temperature sensor, a controller and a controller, the temperature acquisition module is arranged in a heating center area of the streaming media power amplifier equipment and is used for acquiring temperature data of the streaming media power amplifier equipment in real time and transmitting the temperature data to the PWM speed regulation module; the PWM speed regulation module is used for outputting a modulation signal by adopting a preset temperature control strategy according to the temperature collected by the temperature sensor and the type of the heat dissipation fan so as to adjust the holding time of a high level applied to the heat dissipation fan, so that the rotating speed of the heat dissipation fan is controlled to meet the heat dissipation requirements of the streaming media power amplifier equipment at different temperatures; and the auxiliary modulation module is used for assisting the PWM speed regulation module to output a modulation signal to the cooling fan according to requirements so as to control the rotating speed of the cooling fan.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment heat dissipation, in particular to the heat dissipation technology of streaming power amplifier equipment, and more particularly to an implementation temperature control system and method applied to streaming power amplifier equipment. BACKGROUND

[0002] Electronic equipment will generate heat during operation. In order to ensure the service life of the electronic equipment, heat dissipation design is generally made. Heat dissipation is divided into passive heat dissipation and active heat dissipation. Passive heat dissipation is natural heat dissipation, and active heat dissipation is heat dissipation through the setting of fan and other heat dissipation equipment. Among them, the traditional power amplifier equipment generally adopts the design scheme of natural heat dissipation. This heat dissipation method needs to be equipped with a large-sized cabinet structure to have heat dissipation space. Therefore, in order to ensure the heat dissipation effect, engineers have to design the cabinet size to be quite large, and a large number of heat dissipation holes are densely arranged on the cabinet shell. Although this design can meet the basic heat dissipation demand, with the development of audio system, the number of loudspeakers driven by the power amplifier is increasing, especially in the multi-room audio distribution system, the power amplifier needs to drive the loudspeaker groups in multiple areas at the same time. At the same time, the output power of the power amplifier equipment is also continuously improved. These factors all lead to a substantial increase in heat generation. In this case, the design concept of simply relying on natural heat dissipation has shown obvious limitations. The cabinet size of the power amplifier adopting this heat dissipation method becomes larger and larger, which not only increases the manufacturing cost, but also affects the installation and use convenience of the product. Obviously, this traditional heat dissipation scheme has been difficult to adapt to the development demand of modern power amplifier technology for higher power output, and it is urgent to find a more efficient heat dissipation solution.

[0003] To address the shortcomings of traditional passive cooling methods, active cooling has emerged. Active cooling utilizes fan-driven cooling, which is more efficient than passive cooling. However, this active cooling system typically has only two operating states: on and off. These systems can either operate at full speed or completely stopped. When applied to high-heat-generating devices such as high-power amplifiers, high-power cooling fans are essential to ensure adequate heat dissipation. These high-power fans generate considerable airflow noise when operating at high speeds, a particularly significant noise issue when used in confined spaces or quiet environments. Furthermore, full fan speed isn't always necessary for cooling; running at full speed may be sufficient when only a low speed is needed, resulting in significant energy waste. Therefore, effectively reducing fan noise and energy waste while maintaining heat dissipation performance has become a pressing technical challenge. This requires engineers to develop intelligent cooling solutions that both meet heat dissipation requirements and control noise levels. It should be noted that this background information is provided solely to introduce relevant information for the present invention to facilitate understanding of the technical solution, and does not necessarily constitute prior art. In the absence of evidence that the relevant information has been disclosed before the filing date of the present invention, the relevant information shall not be regarded as prior art. Summary of the Invention

[0004] Therefore, the purpose of the present invention is to overcome the above-mentioned defects of the prior art and provide a real-time heat dissipation control system and method for a streaming media power amplifier device.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] According to a first aspect of the present invention, a real-time heat dissipation control system for a streaming media power amplifier device is provided. The streaming media power amplifier device is equipped with a cooling fan. The system is used to control the operating speed of the cooling fan in real time according to the temperature of the streaming media power amplifier device. The system includes: a temperature sensor, which is arranged in the heat center area of ​​the streaming media power amplifier device, and is used to collect temperature data of the streaming media power amplifier device in real time and transmit it to a PWM speed regulation module; the PWM speed regulation module is used to output a modulation signal based on the temperature collected by the temperature sensor and the type of the cooling fan, using a preset temperature control strategy to adjust the high-level holding time applied to the cooling fan, thereby controlling the speed of the cooling fan to meet the cooling requirements of the streaming media power amplifier device at different temperatures; and an auxiliary modulation module is used to assist the PWM speed regulation module in outputting a modulation signal to the cooling fan according to demand to achieve control of the cooling fan speed.

[0007] Preferably, the PWM speed regulation module is configured with a low-frequency PWM modulation mode and a high-frequency PWM modulation mode, wherein: when the cooling fan configured in the streaming power amplifier device is a two-wire fan, the PWM speed regulation module works in the low-frequency PWM modulation mode, and the auxiliary modulation module applies the modulation signal to the power supply line of the two-wire fan; when the cooling fan configured in the streaming power amplifier device is a four-wire fan, the PWM speed regulation module works in the high-frequency PWM modulation mode, and directly applies the modulation signal to the signal line of the four-wire fan.

[0008] Preferably, the preset temperature control strategy is: when the temperature of the streaming power amplifier device is in the normal temperature zone, the fan is turned off; when the temperature of the streaming power amplifier device is in the pre-warning zone, the fan speed is 25% of the full load speed; when the temperature of the streaming power amplifier device is in the high temperature zone, the fan speed is 50% of the full load speed; when the temperature of the streaming power amplifier device is in the danger zone, the fan speed is 75% of the full load speed; when the temperature of the streaming power amplifier device is in the emergency zone, the fan speed is the full load speed and the protective shutdown mechanism of the streaming power amplifier device is triggered at the same time.

[0009] Preferably, the normal temperature zone is a temperature range of 0°-40°, the pre-warning zone is a temperature range of 41°-60°, the high temperature zone is a temperature range of 61°-80°, the danger zone is a temperature range of 81°-99°, and the emergency zone is a temperature range greater than or equal to 100°.

[0010] Preferably, the PWM speed regulation module is configured with a visual high-frequency modulation mode control app for adjusting the high-level holding time in the high-frequency modulation mode, wherein, in the high-frequency modulation mode, the high-frequency cycle time is divided into multiple equal parts, and each equal part is the minimum adjustment unit; the visual high-frequency modulation mode control app adjusts the high-level holding time proportion according to the fan control strategy.

[0011] Preferably, the auxiliary modulation module includes a resistor and a field effect transistor, wherein one end of the resistor is connected to a 3.3V voltage, the other end is connected to the field effect transistor, and the field effect transistor is grounded at the drain and connected to the power supply line of the two-wire fan at the source.

[0012] Preferably, when the PWM speed regulation module adopts the low-frequency mode, the working frequency is 33Hz; and when the PWM speed regulation module adopts the high-frequency mode, the working frequency is 33KHz.

[0013] According to the second aspect of the present application, a streaming power amplifier device real-time cooling control method of the system of the first aspect of the present application is provided, the method comprising: S1, collecting temperature data of the heating center area of the streaming power amplifier device in real time; S2, judging the corresponding fan strategy to be taken according to the temperature, and controlling the speed of the cooling fan based on the fan strategy.

[0014] Compared with the prior art, the advantages of the present application are that: using pulse width modulation (PWM) technology to control the fan speed is a very efficient energy-saving method. By precisely adjusting the pulse width to change the power supply time of the fan motor, PWM control can intelligently adjust the fan speed according to the actual heat dissipation demand, avoiding the energy waste caused by the continuous full-speed operation of traditional constant-speed fans. This control method not only can significantly reduce power consumption, but also can prolong the service life of the fan, while maintaining good heat dissipation effect. Compared with the traditional voltage speed regulation method, PWM control has obvious advantages such as fast response speed, high efficiency, low noise, etc., and is an ideal choice to realize intelligent temperature control system. BRIEF DESCRIPTION OF DRAWINGS

[0015] The embodiments of the present application will be further described below with reference to the accompanying drawings, in which:

[0016] Figure 1 The structure schematic diagram of the real-time heat dissipation control system according to the embodiments of the present application;

[0017] Figure 2 The PWM modulation square wave duty cycle schematic diagram according to the embodiments of the present application;

[0018] Figure 3 The auxiliary module, heat dissipation fan and PWM speed regulation module connection schematic diagram according to the embodiments of the present application;

[0019] Figure 4 The pulse slow rise and slow fall schematic diagram according to the embodiments of the present application;

[0020] Figure 5 The pulse spread square wave schematic diagram according to the embodiments of the present application;

[0021] Figure 6 The high-frequency PWM modulation mode structure schematic diagram according to the embodiments of the present application;

[0022] Figure 7 The high-frequency modulation mode fan switch control app schematic diagram according to the embodiments of the present application;

[0023] Figure 8 The high-frequency modulation mode fan adjustment control app wind speed PWM modulation square wave duty cycle schematic diagram according to the embodiments of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose of the present application, the technical scheme and advantages more clear and explicit, the present application will be further described in detail below by combining with the accompanying drawings through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0025] As mentioned in the background section, existing cooling solutions fail to effectively reduce fan noise and energy waste while ensuring heat dissipation performance. To address this, the present invention proposes a novel real-time cooling control solution based on pulse-width modulation (PWM) technology. This solution uses a high-precision digital temperature sensor to collect temperature data at key locations within the power amplifier system at a frequency sufficient to meet control requirements (e.g., once per second). Different fan control strategies are then employed to control the fan speed based on the varying temperatures.

[0026] In order to better understand the present invention, the principle of fan speed regulation in the scheme of the present invention is briefly introduced below. The implementation of fan speed regulation usually relies on the precise control of voltage. In principle, the speed of the fan is positively correlated with the operating voltage applied to it. However, in digital circuit systems, the power supply voltage is usually a constant DC voltage, which creates a technical problem: how to achieve flexible adjustment of the fan speed while maintaining the power supply voltage unchanged. In order to solve this problem, engineers have developed a variety of innovative speed regulation methods, including but not limited to pulse width modulation (PWM) technology, variable resistor control and digital signal control. The core idea of ​​these methods is to achieve precise control of the fan speed by changing the effective value or duty cycle of the voltage, rather than directly adjusting the voltage amplitude. In the scheme of the present invention, in order to achieve precise temperature control, PWM modulation technology is used to perform fan speed regulation.

[0027] According to one embodiment of the present invention, Figure 1 As shown, the present invention provides a real-time heat dissipation control system for a streaming media power amplifier device. The streaming media power amplifier device is equipped with a heat dissipation fan. The system is used to control the operating speed of the heat dissipation fan in real time according to the temperature of the streaming media power amplifier device. The system includes: a temperature sensor, which is arranged in the heat center area of ​​the streaming media power amplifier device, and is used to collect temperature data of the streaming media power amplifier device in real time and transmit it to a PWM speed regulation module; the PWM speed regulation module is used to output a modulation signal based on the temperature collected by the temperature sensor and the type of the heat dissipation fan, using a preset fan control strategy to adjust the high-level holding time applied to the heat dissipation fan, thereby controlling the speed of the heat dissipation fan to meet the heat dissipation requirements of the streaming media power amplifier device at different temperatures; and an auxiliary modulation module is used to assist the PWM speed regulation module in outputting a modulation signal to the heat dissipation fan according to demand to achieve control of the heat dissipation fan speed.

[0028] According to one embodiment of the present application, the temperature range is divided into five key ranges according to the actual application scene requirements: normal temperature range (for example, 0-40℃), warning range (for example, 41-60℃), high temperature range (for example, 61-80℃), dangerous range (for example, 81-100℃) and emergency range (for example, above 100℃). For each temperature range, the system of the present application intelligently matches the corresponding temperature control strategy: maintaining the normal cooling mode in the normal temperature range; automatically increasing the fan speed when entering the warning range; starting the auxiliary cooling device when reaching the high temperature range; reducing the power amplifier output power when the temperature rises to the dangerous range; and triggering the protective shutdown mechanism immediately once entering the emergency range to ensure the safety of the equipment. The whole system realizes accurate temperature regulation and control through a closed-loop control algorithm, and has a temperature abnormality alarm function, providing reliable protection for the stable operation of the power amplifier system.

[0029] According to one embodiment of the present application, as shown in Figure 2 the temperature of the streaming media power amplifier system is read and the interval in which the temperature is located is judged, wherein when the temperature of the streaming media power amplifier device is in the normal temperature range, the fan is closed and passive natural cooling is adopted; when the temperature of the streaming media power amplifier device is in the warning range, the fan speed is 25% of the full load speed; when the temperature of the streaming media power amplifier device is in the high temperature range, the fan speed is 50% of the full load speed; when the temperature of the streaming media power amplifier device is in the dangerous range, the fan speed is 75% of the full load speed; and when the temperature of the streaming media power amplifier device is in the emergency range, the fan speed is the full load speed and the protective shutdown mechanism of the streaming media power amplifier device is triggered at the same time. For the cooling requirements of different temperature regions in the electronic device, through the differential control strategy of intelligently adjusting the fan speed, the running noise can be controlled within a reasonable range while ensuring effective cooling performance, so as to realize the best balance between cooling efficiency and acoustic comfort. This zoning temperature control scheme dynamically adjusts the fan speed according to the actual temperature change in each region, uses a higher speed in the high temperature region to strengthen cooling, and appropriately reduces the speed in the lower temperature region, which not only meets the overall cooling requirement, but also avoids unnecessary noise generation, and finally achieves the optimization and coordination of cooling effect and silence performance.

[0030] Further, it needs to be explained that, since the fans used in the streaming power amplifier device are different, there are two-line fans and four-line fans, therefore, in the scheme of the present application, two control modes are provided, namely, a low-frequency PWM modulation mode and a high-frequency PWM modulation mode, wherein: when the cooling fan configured in the streaming power amplifier device is a two-line fan, the PWM speed regulation module works in the low-frequency PWM modulation mode, and the auxiliary modulation module is used to apply the modulation signal to the power supply line of the two-line fan; when the cooling fan configured in the streaming power amplifier device is a four-line fan, the PWM speed regulation module works in the high-frequency PWM modulation mode, and the modulation signal is directly applied to the signal line of the four-line fan. In either modulation mode, the driving method is consistent. In the present application, the intelligent modulation method of PWM (pulse width modulation) is used to convert a simple on-off signal into a square wave signal output with a specific duty cycle, and by adjusting the ratio of the high-level duration to the entire cycle (i.e. the duty cycle) in the square wave signal, the output effect of different voltage values is equivalent. When the duty cycle increases, the average voltage of the equivalent output increases, and the fan speed increases accordingly; on the contrary, when the duty cycle decreases, the equivalent voltage decreases, and the fan speed decreases accordingly. This PWM modulation technology not only retains the advantages of simple and reliable digital control, but also can realize the continuous adjustment effect similar to analog control, which is an ideal solution for controlling the speed of the fan. As shown in Figure 3 , when the fan needs to rotate at 50% speed, the duty cycle is modulated to 50%, and other speeds are the same.

[0031] , for a two-line cooling fan, a low-frequency PWM modulation mode is used, and an auxiliary modulation module is needed, as shown in Figure 3 , a resistor and a field effect transistor, wherein one end of the resistor is connected to a 3.3V voltage, the other end is connected to the gate of the field effect transistor, and then they are jointly connected to the output end of the PWM speed regulation module, the drain of the field effect transistor is grounded, and the source of the field effect transistor is connected to the power supply line of the two-line fan. The auxiliary modulation module can be perfectly matched with the PWM output signal. The purpose of using the field effect transistor is to change the waveform of the square wave, and to change the jump of the square wave from 0 to 1 into a slow rise and slow fall as shown in Figure 4 . This combination scheme not only realizes efficient fan speed control, but also ensures the stability and reliability of the system. The main advantage of this driving method is simplicity, low cost and high efficiency, because the fan is either completely on or completely off.

[0032] In addition, in order to ensure that the user does not obviously perceive the noise change caused by the fan start-stop during the use of the device, thereby improving the overall use experience, the frequency parameter of the output square wave needs to be carefully designed and set. After in-depth research and repeated verification, the inventors found that controlling the output frequency in the range of 25Hz to 35Hz is the most appropriate. Within this frequency range, the fan operation can remain stable while effectively reducing the noise fluctuation disturbance to the user. Among them, the output frequency of 33Hz performs best, which can maximize the discomfort caused by noise change while ensuring the heat dissipation efficiency, so 33Hz is adopted as the optimal working frequency selection in the low-frequency PWM modulation mode in the present application scheme.

[0033] However, it is worth mentioning that the PWM modulation mode also has certain disadvantages. Since the fan is not powered at all times, the speed information will be truncated by the PWM drive signal. A technique called pulse stretching can be used to obtain the speed information, i.e. the fan is turned on for a long enough time to collect the speed information (which can increase the audible noise). As shown in Figure 4 , an example of pulse stretching is shown. Because the fan is powered by the PWM drive signal, when PWM modulation occurs, the effective high-level pulse period of 33HZ is short, and the power supply of the speed measurement circuit on the fan is also derived from the PWM drive signal. When the period is very short, the speed measurement circuit has not had time to start speed measurement before the PWM changes to the low-level period, so a wider high-level speed measurement period needs to be inserted in the PWM period to make the speed measurement circuit on the fan work normally.

[0034] Another disadvantage of the low-frequency PWM debugging mode is the commutation noise, which can produce audible noise due to the continuous opening and closing of the fan coil. For streaming media power amplifier devices configured with four-wire fans, the present application designs a high-frequency PWM modulation mode and drives the fan at a frequency of 33kHz, which is beyond the audible range, effectively reducing the noise. Among them, the circuit of the high-frequency PWM modulation mode is simpler, as shown in Figure 5 , the high-frequency PWM modulation signal is directly loaded onto the lines of the four-wire fan. The PWM signal directly drives the fan, and the drive field effect transistor is integrated inside the fan. This method reduces the number of external components, making the external circuit simpler. Since the PWM drive signal is directly applied to the coil of the fan, the electronic components of the fan are always in the power-on state, and the speed signal is always available. This eliminates the need for pulse stretching and avoids the noise it may generate. Since the coil switching frequency is outside the audible range, the commutation noise is also eliminated or significantly reduced.

[0035] According to one embodiment of the present application, in the heat dissipation control system of the present application, in the high-frequency PWM modulation mode, in order to realize fine speed control, we further subdivide this cycle time into 100 equal parts. For example, in the present application, the high-frequency modulation frequency is 33 kHz, the time length of each complete cycle is 30303 nanoseconds, and each time unit is 303 nanoseconds, which is equivalent to 1% of the total cycle. This fine division allows speed control to be accurately adjusted in units of 1%. As shown in Figure 6 and 7 The present application is designed to set the high-frequency modulation mode control app in the high-frequency PWM modulation mode, and the app accurately controls the fan speed in the form of a progress bar. According to the required speed percentage (duty cycle), the corresponding high-level holding time is calculated by the formula t=303×duty cycle (unit: nanoseconds). For example, when a 50% duty cycle is required, the high-level holding time is 303×50=15150 nanoseconds. This design not only maintains the efficiency of high-frequency PWM, but also realizes 1% precision speed control, providing more accurate control means for motor drive and other applications.

[0036] Thus, by using high-frequency stepless PWM speed regulation technology, smooth adjustment of fan speed can be achieved, avoiding the noise and vibration problems caused by frequency switching in traditional PWM speed regulation. This technology optimizes the driving signal waveform, allowing the fan to maintain a stable operating state at different speeds, while significantly reducing the impact of electromagnetic interference on the system. To further improve control accuracy, the present application introduces a dynamic compensation algorithm that automatically adjusts the duty cycle of the PWM signal based on real-time temperature feedback, ensuring that the heat dissipation effect and noise level are always at the optimal balance point. In addition, high-frequency stepless speed regulation also supports ultra-low speed operation mode, allowing the fan to run at extremely low speed under light load or low temperature conditions, meeting the basic heat dissipation requirements and reducing operating noise to almost imperceptible levels. This intelligent speed regulation strategy not only improves the overall energy efficiency of the system, but also significantly extends the service life of the fan, providing a more reliable thermal management solution for multi-room streaming power amplifier devices.

[0037] The application controls the rotating speed of the fan by adopting pulse width modulation (PWM) technology, which is a very effective noise reduction method. By accurately adjusting the duty cycle of the PWM signal, the power supply time ratio of the fan motor can be intelligently controlled, thereby realizing smooth adjustment of the rotating speed of the fan. As shown in Table 1, the advantages and disadvantages of on / off, linear, low-frequency PWM, and high-frequency PWM are counted, and it can be seen that the control mode in the application scheme has significant advantages compared with the traditional voltage speed regulation method. It not only can maintain the working efficiency of the fan motor, but also can greatly reduce the mechanical noise caused by the sudden change of rotating speed. Especially in the low load working condition, PWM control can keep the fan in the best rotating speed interval, which not only guarantees the heat dissipation effect, but also maximizes the reduction of aerodynamic noise and mechanical vibration noise generated during fan operation, thereby creating a more quiet and comfortable use environment for users.

[0038] Table 1

[0039] Control method Advantages Disadvantages On / Off Inexpensive Worst, fan always on Linear Quietest Expensive circuit, high power loss Low frequency PWM Pulse width modulation, wide speed control range Fan commutation noise High frequency PWM Excellent acoustic performance, almost comparable to linear sound quality; low cost of external circuit; wide speed control range Requires 4-wire fan

[0040] The application acquires and reads the data signal fed back by the high-precision temperature sensor in real time through the intelligent temperature control system, and accurately obtains the temperature value of each key part in the system. The system will intelligently analyze and process the collected temperature data, divide the entire system space into multiple temperature interval regions, and set specific temperature threshold ranges for each region. According to the specific conditions of different temperature regions, the system will dynamically adjust and execute differentiated temperature regulation schemes: starting the intensified heat dissipation mechanism for high-temperature regions, and implementing precise constant temperature control for medium-temperature regions to ensure that the overall temperature of the system always maintains in the optimal working interval.

[0041] Adopting pulse width modulation (PWM) technology to control the rotating speed of the fan is a very efficient energy-saving method. By accurately adjusting the pulse width to change the power supply time of the fan motor, PWM control can intelligently adjust the rotating speed of the fan according to the actual heat dissipation demand, avoiding the energy waste caused by the continuous full-speed operation of traditional constant-speed fans. This control method not only can significantly reduce power consumption, but also can prolong the service life of the fan while maintaining good heat dissipation effect. Compared with the traditional voltage speed regulation method, PWM control has obvious advantages such as fast response speed, high efficiency, and low noise, and is an ideal choice for realizing the intelligent temperature control system.

[0042] In a multi-room streaming amplifier system, the speed of the cooling fan is precisely controlled using low-frequency pulse width modulation (PWM) technology, enabling intelligent management of device temperature. This thermal management solution can dynamically adjust the duty cycle of the PWM signal based on real-time feedback from internal temperature sensors, allowing the fan to operate at the lowest possible noise level while ensuring adequate cooling. Compared to traditional constant-speed fans, low-frequency PWM control offers lower power consumption, reduced electromagnetic interference, and higher control accuracy, making it particularly suitable for multi-room audio systems that require long-term stable operation. By optimizing cooling efficiency, this technology not only extends the service life of the device but also improves the reliability and user experience of the entire streaming audio system.

[0043] Using high-frequency PWM can achieve the lowest operating fan noise. In the thermal management solution for a multi-room streaming amplifier system, the invention uses high-frequency pulse width modulation (PWM) technology to precisely control the operating state of the cooling fan for four-wire fans. This thermal management technology can intelligently control the fan speed by adjusting the duty cycle of the PWM signal, dynamically adjusting the cooling efficiency based on real-time temperature changes in the system. High-frequency PWM control not only ensures the rapid response capability of the cooling system, but also effectively reduces power consumption and noise, providing a stable and reliable temperature control solution for multi-room streaming amplifier systems. This design not only meets the high requirements of high-performance audio equipment for cooling, but also takes into account the energy efficiency ratio of the system and user experience.

[0044] The above has described various embodiments of the present invention, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications, or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A real-time heat dissipation control system for a streaming media power amplifier device, wherein the streaming media power amplifier device is equipped with a heat dissipation fan. The system is used to control the operating speed of the heat dissipation fan in real time according to the temperature of the streaming media power amplifier device, characterized in that: The system comprises: A temperature sensor is provided in the heat center area of ​​the streaming media power amplifier device, and is used to collect temperature data of the streaming media power amplifier device in real time and transmit it to the PWM speed control module; The PWM speed control module is used to output a modulation signal based on the temperature collected by the temperature sensor and the type of cooling fan, using a preset temperature control strategy to adjust the high-level holding time applied to the cooling fan, thereby controlling the cooling fan speed to meet the cooling requirements of the streaming media power amplifier device at different temperatures; The auxiliary modulation module is used to assist the PWM speed regulation module to output a modulation signal to the cooling fan according to demand to control the speed of the cooling fan.

2. The real-time heat dissipation control system for streaming media power amplifier equipment according to claim 1 is characterized in that: The PWM speed regulation module is configured with a low-frequency PWM modulation mode and a high-frequency PWM modulation mode, wherein: When the cooling fan configured in the streaming media power amplifier device is a two-wire fan, the PWM speed regulation module operates in a low-frequency PWM modulation mode and applies the modulation signal to the power supply line of the two-wire fan through the auxiliary modulation module; When the cooling fan configured in the streaming media power amplifier device is a four-wire fan, the PWM speed regulation module operates in a high-frequency PWM modulation mode and directly applies the modulation signal to the signal line of the four-wire fan.

3. The real-time heat dissipation control system for streaming media power amplifier equipment according to claim 2 is characterized in that: The preset temperature control strategies are: When the temperature of the streaming media amplifier device is within the normal range, the fan turns off; When the temperature of the streaming media power amplifier device is in the warning zone, the fan speed is 25% of the full load speed; When the temperature of the streaming media power amplifier device is in the high temperature zone, the fan speed is 50% of the full load speed; When the temperature of the streaming media amplifier device is in the danger zone, the fan speed is 75% of the full load speed; When the temperature of the streaming media power amplifier device is in the emergency zone, the fan speed is full load speed and the protective shutdown mechanism of the streaming media power amplifier device is triggered at the same time.

4. The real-time heat dissipation control system for streaming media power amplifier equipment according to claim 3, characterized in that: Normal temperature zone is 0°-40° temperature range; The warning area is in the temperature range of 41°-60°; The high temperature zone is the temperature range of 61°-80°; Dangerous area temperature range 81°-99°; The emergency zone is the temperature range greater than or equal to 100°.

5. The real-time heat dissipation control system for streaming media power amplifier equipment according to claim 4 is characterized in that: The PWM speed regulation module is equipped with a visual high-frequency modulation mode control app for adjusting the high-level holding time in the high-frequency modulation mode. In the high-frequency modulation mode, each high-frequency cycle time is divided into multiple equal parts, and each equal part is the minimum adjustment unit; Use the visual high-frequency modulation mode control app to adjust the high-level hold time ratio according to the fan control strategy.

6. The real-time heat dissipation control system for streaming media power amplifier equipment according to claim 5, characterized in that: The auxiliary modulation module includes: a resistor and a field-effect transistor, wherein one end of the resistor is connected to a 3.3V voltage, and the other end is connected to the field-effect transistor and then connected to the output end of the PWM speed regulation module. The drain of the field-effect transistor is grounded, and the source of the field-effect transistor is connected to the power supply line of the two-wire fan.

7. The real-time heat dissipation control system for streaming media power amplifier equipment according to claim 6, characterized in that: When the PWM speed regulation module adopts the low frequency mode, the operating frequency is 33Hz; When the PWM speed regulation module adopts the high frequency mode, the operating frequency is 33KHz.

8. A real-time heat dissipation control method for a streaming media power amplifier device based on the system according to any one of claims 1 to 7, characterized in that: The method comprises: S1, real-time collection of temperature data of the heating center area of ​​the streaming media power amplifier device; S2. Determine the corresponding fan strategy to be adopted according to the temperature, and control the speed of the cooling fan based on the fan strategy.

9. A computer-readable storage medium, characterized in that A computer program is stored thereon, and the computer program can be executed by a processor to implement the steps of the method according to claim 8.

10. An electronic device, characterized in that: include: One or more processors, and memory, wherein the memory is configured to store executable instructions; The one or more processors are configured to implement the steps of the method of claim 8 by executing the executable instructions.

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