A heat dissipation system

Abstract

The application provides a heat dissipation system, relates to the technical field of mobile phone wireless chargers, and comprises a structure for prolonging the service life of a heat dissipation fan, wherein the structure for prolonging the service life of the heat dissipation fan comprises a fan body, the fan body is arranged in a wireless charger, the fan body comprises a fan Hall element and a sliding bearing, and the application further comprises that a bearing sleeve opening of the sliding bearing is arranged upwards, and the fan Hall element is away from a strong magnet of the wireless charger. The fan body is a brushless motor fan. The strong magnet is made of neodymium iron boron material, is arranged at the upper portion of the wireless charger, is used for fixedly connecting a mobile phone and the wireless charger, and enables the mobile phone to be adsorbed and aligned with the wireless charger during charging. After the improvement, the service life is prolonged by 20%; the fan will not be interfered by the strong magnet to cause poor starting, unstable rotating speed and other phenomena.

Description

Technical Field

[0001] This invention relates to the field of mobile phone wireless charger technology, specifically to a structure and heat dissipation system for improving the lifespan of a cooling fan. Background Technology

[0002] Cooling fans have the following problems in the common application of wireless chargers for mobile phones: (1) Due to cost requirements, the fan uses a sliding bearing (oil-containing) fan; when this type of fan is used with the bearing sleeve opening facing downward, the grease loss will be accelerated and the life of the fan will be shortened. (2) Chargers often use strong magnets (neodymium iron boron). The fan's Hall is on the side closest to the phone (and also close to the strong magnet). The Hall in the fan is easily interfered with by the magnetic field of the magnet that holds the phone in place. Summary of the Invention

[0003] This invention provides a structure and heat dissipation system for improving the lifespan of a cooling fan, thereby solving the technical problems mentioned in the background art.

[0004] To address the aforementioned technical problems, this invention discloses a structure for improving the lifespan of a cooling fan, comprising a fan body disposed within a wireless charger. The fan body includes a fan hall element and a sliding bearing, and further comprises: The opening of the bearing sleeve of the sliding bearing is set upwards; The fan hall element is located away from the strong magnet of the wireless charger.

[0005] Preferably, the fan body is a brushless motor fan.

[0006] Preferably, the strong magnet is made of neodymium iron boron and is disposed in the upper part of the wireless charger for fixing the mobile phone and the wireless charger, so that the mobile phone is magnetically aligned with the wireless charger when charging.

[0007] Preferably, the fan body includes a stator, a rotor, and a fan hall element. The fan hall element realizes the fan current commutation based on the sensed rotor magnetic field signal, thereby driving the fan blades on the rotor to rotate. The sliding bearing is used to support the rotor of the fan body, and the sliding bearing adopts an oil-impregnated sliding bearing structure.

[0008] The present invention also discloses a heat dissipation system, including the aforementioned structure for improving the lifespan of a cooling fan, and further comprising: Temperature detection module one: used to detect the surface temperature of the target electrical device; the target electrical device is the electrical device in the wireless charger that dissipates heat through the fan body; each target electrical device corresponds to one temperature detection module one; The control device is electrically connected to the temperature detection module and the fan body. The control device includes: Evaluation module: Used to periodically determine the standard temperature state value of each target electrical device for the corresponding set time period based on the detection value of the temperature monitoring module within the current set time period. First warning module: used to issue a first warning when the temperature standard state value of any target electrical device for a set time period is greater than the preset first standard state value; Second warning module: Used to issue a second warning when the first warning module issues a warning, and when the fan body operates for a set period of time.

[0009] Preferably, the control device includes: the evaluation module calculates based on the following formula: ; in, The temperature standard state value for the k-th set duration of the i-th target electrical device; The average detection value of the last M detection values ​​of the temperature detection module 1 within the k-th set time period of the i-th target electrical device; Let be the maximum allowable temperature of the i-th target electrical component; ; This is the temperature state value compensation coefficient; for The corresponding baseline value.

[0010] Preferred options also include: Temperature detection module 2: Used to detect the ambient temperature outside the wireless charger; Wind speed detection module: used to detect the wind speed at the air outlet of the fan body; The control device is electrically connected to the temperature detection module 2 and the wind speed detection module respectively. The control device further includes: Module 1: Used to obtain the battery information of the phone being charged within the current set time period, and to obtain the battery segment-average charging power mapping table of the phone being charged. Module 2: Used to obtain the fitting curve of the air speed at the air outlet of the fan body and the theoretical heat dissipation efficiency of the target electrical component. The heat dissipation efficiency of the target electrical component is the ratio of the heat dissipation power of the target electrical component to the heat dissipation power at the fan body. Module 3: Used to obtain the actual heat dissipation efficiency of each target electrical component on the fan body for a set heat dissipation duration of one. Determine Module 1: Based on the acquisition modules 1, 2, and 3, the temperature detection value of the current set duration 1 by module 2, and the current set duration 1 temperature standard state value of each target electrical device, determine the target heat dissipation power at the fan body corresponding to the next set duration 1 for each target electrical device; And select the maximum target heat dissipation power at the fan body as the required heat dissipation power for the next set duration of the fan body; Control module: Used to control the fan body to work for the next set time period based on the required cooling power of the fan body for the next set time period.

[0011] Preferably, the determining module one includes: Determining Unit 1: Used to determine the total target heat dissipation power of each target electrical device for the next set time period based on the average detection value of the last M detection values ​​of the temperature detection module 1 within the current set time period 1 from the acquisition module 1. Unit 2: Used to determine the target heat dissipation power at the fan body corresponding to the next set time period of each target electrical device based on the total target heat dissipation power of the next set time period of each target electrical device, the acquisition module 2, the acquisition module 3, the current set time period of each target electrical device's temperature standard state value, and the current set time period of the temperature detection module 2's detection value.

[0012] Preferably, it also includes an intelligent early warning device, the intelligent early warning device comprising: Bearing testing module: used to test key parameters of sliding bearings; key parameters include: surface temperature, amplitude, and vibration frequency; Module 2: Used to determine the current standard state value of each key parameter based on the current detection values ​​of the key parameters of the sliding bearing; The third early warning module is used to issue an early warning when the current standard state value of any key parameter is not within the corresponding allowable range. Test module: Used to periodically perform a fan speed adjustment test. Each test fan speed is tested for a set duration of two. The test module determines the fitting curve of the average unit time standard state value change rate of the fan body speed and key parameters corresponding to the fan speed adjustment test, and calibrates the average unit time standard state value change rate of each test fan speed. Determine Module 3: Used to determine the current target maximum allowable speed of the fan body based on Determine Module 2 and the Test Module when the third warning module issues a warning; The fourth early warning module is used to issue an early warning when the actual speed of the fan body is greater than or equal to the current target maximum allowable speed of the fan body.

[0013] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By changing the motor mounting orientation of the fan in the wireless charger so that the bearing sleeve opening faces upwards during use, the lifespan of the fan can be improved. By changing the motor mounting direction of the fan in the charger, the fan hall component is moved away from the magnet that holds the phone in place, reducing the risk of interference.

[0015] After the improvements, the lifespan is increased by 20%; the fan will no longer experience problems such as poor starting or unstable speed due to interference from strong magnets. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of a conventional wireless charger for mobile phones.

[0017] In the diagram: 1. Fan Hall component; 2. Sliding bearing; 21. Bearing sleeve outlet; 3. Strong magnet; 4. Mobile phone; 5. Wireless charger. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0020] The present invention provides the following embodiments: Example 1: This embodiment of the invention provides a structure to improve the lifespan of a cooling fan, such as... Figure 1 As shown, it includes: The device includes a fan body housed within the wireless charger 5. The fan body comprises a fan hall element 1 and a sliding bearing 2, and also includes: The bearing sleeve opening of the sliding bearing 2 is set facing upwards. Figure 1 In the middle, at the bearing sleeve outlet 21); The fan Hall element 1 is located away from the strong magnet 3 of the wireless charger 5.

[0021] The fan body is a brushless motor fan.

[0022] The strong magnet 3 is made of neodymium iron boron and is located in the upper part of the wireless charger 5. It is used to fix the mobile phone 4 and the wireless charger 5 so that the mobile phone 4 is attracted and aligned with the wireless charger 5 when charging.

[0023] The fan body includes a stator, a rotor, and a fan Hall element 1. The fan Hall element 1 realizes the fan current commutation based on the sensed rotor magnetic field signal, thereby driving the fan blades on the rotor to rotate. The sliding bearing 2 is used to support the rotor of the fan body, and the sliding bearing 2 adopts an oil-impregnated sliding bearing structure.

[0024] Figure 2 A cross-sectional structural diagram of a conventional wireless charger for mobile phones; The beneficial effects of the above scheme are as follows: By changing the motor mounting orientation of the fan in the wireless charger so that the bearing sleeve opening faces upwards during use, the lifespan of the fan can be improved. By changing the motor mounting direction of the fan in the charger, the fan Hall element 1 is moved away from the magnet that holds the phone, reducing the risk of interference.

[0025] After the improvements, the lifespan is increased by 20%; the fan will no longer experience problems such as poor starting or unstable speed due to interference from strong magnets.

[0026] Example 2: This invention discloses a heat dissipation system, including the aforementioned structure for improving the lifespan of a cooling fan, and further comprising: Temperature detection module 1: used to detect the surface temperature of the target electrical component; the target electrical component is an electrical component in the wireless charger that dissipates heat through the fan body; The control device is electrically connected to the temperature detection module and the fan body. The control device includes: Evaluation module: Used to periodically determine the standard temperature state value of each target electrical device for the corresponding set time period based on the detection value of the temperature monitoring module 1 within the current set time period (which can be 10S-60S). First warning module: used to issue a first warning when the temperature standard state value of any target electrical device for a set time period is greater than the preset first standard state value; Second warning module: Used to issue a second warning when the first warning module issues a warning and the fan body operates for a set period of time. The evaluation module calculates based on the following formula: ; in, The temperature standard state value for the k-th set duration of the i-th target electrical device; The average detection value of the last M (values ​​range from 3 to 10, with a possible value of 5) temperature detection values ​​of the i-th target electrical device within the k-th set time period; Let be the maximum allowable temperature of the i-th target electrical component; ; This is the temperature state value compensation coefficient (with a value greater than 0.1 and less than 1). for The corresponding baseline value (which can be between 0.1 and 0.5).

[0027] The beneficial effects of the above scheme are as follows: Temperature state quantification: through formula The temperature value of the target electrical device is converted into a standardized state value. The judgment is no longer based solely on a single temperature threshold, but rather on a combination of temperature change trends. (Reflects the rate of temperature change) and the maximum allowable temperature It can accurately depict the thermal state of electrical components, reducing false or missed warnings caused by temperature fluctuations.

[0028] Noise smoothing: utilizing (The average of the last M detection values ​​within a set time period) smooths the instantaneous noise of temperature detection, making the evaluation results more stable, closely reflecting the actual continuous heating state of electrical components, and improving the reliability of temperature evaluation.

[0029] Real-time risk warning (first warning module): when When the temperature exceeds the preset first standard state value, the first warning is triggered, which can quickly respond to the overheating risk of the electrical components at the current time and intervene in a timely manner to make adjustments (such as increasing the fan speed, suspending wireless charging, etc.) to avoid damage to the components due to continuous temperature rise and prevent failure.

[0030] Tracking the fan's cooling performance (second warning module): When the first warning is triggered, if the fan is in operation for the corresponding set duration of one hour but an overheating warning still occurs, it indicates that the fan's cooling performance is abnormal. Adjustments should be made based on the fan's cooling performance. So that the next set duration can be based on Adjust the fan speed or stop using the wireless charger.

[0031] The solution of this invention supports the periodic evaluation of the standard temperature state values ​​of multiple target electrical components (components with different functions and thermal characteristics) in a wireless charger, adapting to the differentiated heat dissipation requirements of multiple heat sources in complex circuits, and simultaneously ensuring the temperature safety of key components such as charging coils and main control chips.

[0032] Optimize heat dissipation control and improve system reliability. Accurate temperature assessment and graded early warning provide a basis for adjusting the fan cooling strategy of the control device.

[0033] It can intervene in the early stages of temperature abnormalities and reasonably schedule the operation of the fan (such as dynamically adjusting the speed and maintaining the fan in advance), which can not only ensure that the target electrical components operate within a safe temperature range, but also avoid the fan from operating ineffectively or excessively, thus extending the service life of the fan and the entire wireless charging system and improving the long-term reliability and stability of the system.

[0034] Example 3, based on Example 2, further includes: Temperature detection module 2: Used to detect the ambient temperature outside the wireless charger; Wind speed detection module: used to detect the wind speed at the air outlet of the fan body; The control device is electrically connected to the temperature detection module 2 and the wind speed detection module respectively. The control device further includes: Module 1: Used to obtain the battery information of the phone being charged within the current set time period, and to obtain the battery segment-average charging power mapping table of the phone being charged (it can also obtain the charging power of the wireless charger itself during the charging process based on the acquisition module). Module 2: Used to obtain the fitting curve of the air speed at the air outlet of the fan body and the theoretical heat dissipation efficiency of the target electrical component. The heat dissipation efficiency of the target electrical component is the ratio of the heat dissipation power of the target electrical component to the heat dissipation power at the fan body. Module 3: Used to obtain the actual heat dissipation efficiency of each target electrical component on the fan body for a set heat dissipation duration of one. Determine module: Used to determine the target heat dissipation power at the fan body corresponding to the next set duration one for each target electrical device based on the detection value of temperature detection module two of the acquisition module one, the acquisition module two, the acquisition module three, the current set duration one temperature standard state value of each target electrical device, and the current set duration one temperature standard state value of each target electrical device. And select the maximum target heat dissipation power at the fan body as the required heat dissipation power for the next set duration of the fan body; Control module: Used to control the fan body to work for the next set time period based on the required cooling power of the fan body for the next set time period.

[0035] The determining module includes: Determining Unit 1: Used to determine the total target heat dissipation power of each target electrical device for the next set time period based on the average detection value of the last M detection values ​​of the temperature detection module 1 within the current set time period 1 from the acquisition module 1. ; The heat generation power of the i-th target electrical device is determined based on the input power of the wireless charger corresponding to the average charging power of the mobile phone being charged for the next set time determined by the acquisition module 1 (based on the theoretical heat generation efficiency of the i-th target electrical device). The total target heat dissipation power for the next set duration of the i-th target electrical device; The average of the last M detection values ​​of the temperature detection module 1 within the current set time period of the i-th target electrical device; Let be the ideal operating temperature of the i-th target electrical device; For the i-th target electrical device from Down to Target duration; Let be the heat capacity of the i-th target electrical device; Unit 2: Used to determine the target heat dissipation power at the fan body corresponding to the next set time period of each target electrical device based on the total target heat dissipation power of the next set time period of each target electrical device, the acquisition module 2, the acquisition module 3, the current set time period of each target electrical device's temperature standard state value, and the current set time period of the temperature detection module 2's detection value.

[0036] ; in, The target heat dissipation power at the fan body corresponding to the next set duration for the i-th target electrical device; The compensation coefficient corresponding to the standard temperature value (based on experimental simulation calibration, the value can be 0.05-0.3). To obtain the actual heat dissipation efficiency of the i-th target electrical component obtained from Module 3; The heat dissipation power of the fan body is [ , The theoretical average wind speed of the fan body at that time; The temperature detection value is the value detected by the second temperature detection module for the current set duration. The heat dissipation compensation coefficient is 2 (based on experimental simulation calibration, the value can be 0.05-0.3; the higher the ambient temperature, the greater the difficulty of heat dissipation, and the more powerful the fan needs to be). The beneficial effects of the above technical solution are as follows: Traditional problem: During wireless charging, changes in phone battery level and ambient temperature fluctuations cause dynamic changes in the heat demand of electrical components. Conventional heat dissipation operates at a fixed power, which can easily lead to "underheating" or "overheating". This invention uses Module 1 (battery level-power mapping) and Module 1 (thermal capacity-heat coupling calculation) to deduce the "total target heat dissipation power for the next time period" in real time, achieving dynamic matching of "heat demand-heat dissipation power". Temperature standard state compensation (in the formula of Unit 2) ): Introduction (Temperature standard state value) compensates for "gradual / abrupt temperature changes and the cooling effect of the fan body within the current set duration".

[0037] Actual heat dissipation efficiency feedback (obtained from Module 3) ): By comparing the "theoretical heat dissipation efficiency" with the "actual heat dissipation efficiency", the fan power requirements are adjusted to solve the efficiency degradation problems caused by dust accumulation in the air duct and fan aging.

[0038] Fan power decision: By integrating "total target heat dissipation power, temperature status, ambient temperature, and actual efficiency" in Unit 2, the "target heat dissipation power at the fan body" is output. This enables system-level collaboration between devices, fans, and the environment.

[0039] Selection of required heat dissipation power: Take the maximum target heat dissipation power as the requirement for the fan body to ensure heat dissipation safety under extreme operating conditions.

[0040] Example 4, based on any one of Examples 1-3, It also includes an intelligent early warning device, which comprises: Bearing testing module: used to test the key parameters of sliding bearing 2; key parameters include: surface temperature, amplitude, and vibration frequency; Module 2: Used to determine the current standard state value of each key parameter based on the current key parameter detection value of the sliding bearing 2; the current standard state value of the key parameter is: the current detection value of the key parameter ÷ the current maximum allowable value of the key parameter; The third early warning module is used to issue an early warning when the current standard state value of any key parameter is not within the corresponding allowable range. Test module: Used to periodically perform a fan speed adjustment test (select several test fan speeds from the common speed range of the fan body according to preset rules; a fan speed adjustment test can be performed every H days). Each test fan speed is tested for a set duration of two, and the fitting curve of the average unit time standard state value change rate of the fan body speed and key parameters corresponding to the fan speed adjustment test is determined; a fitting curve corresponds to each key parameter. Determine Module 3: Used to determine the current target maximum permissible speed of the fan body based on Determine Module 2 and the Test Module when the third warning module issues a warning. ; ; M represents the maximum permissible speed of the fan body (determined by testing the fan body under the baseline standard state value of each key parameter); M represents the total number of key parameters. This is the baseline standard state value for the m-th key parameter of the fan body; This represents the current standard state value of the m-th key parameter of the fan body; Given the current fan speed (based on detection), the average standard state value change rate corresponding to the fitting curve of the fan speed - the average standard state value change rate of the key parameter at the latest m-th key parameter obtained by the test module. For the largest The ideal time interval between two consecutive determinations of the target maximum permissible speed of the fan body (which can be based on different preset maximum values). The value range is determined by a mapping table of ideal time intervals between two consecutive determinations of the target maximum allowable speed of the fan body (this can be based on experimental calibration, or on different...). (Value range up to the length of time before loss of control is set), where the largest value is... The larger the value, the smaller the ideal time interval between two consecutive determinations of the target maximum permissible speed of the fan body; for example... When the value ranges from 0.9 to 1, the ideal time interval between two consecutive determinations of the target maximum allowable speed of the fan body is 30 seconds. The weights corresponding to the m-th key parameter are (where the amplitude can be 1.3-1.6, the temperature can be 0.9-1.1, and the vibration frequency can be 1.8-2.2). The fourth early warning module is used to issue an early warning when the actual speed of the fan body is greater than or equal to the current target maximum allowable speed of the fan body.

[0041] The beneficial effects of the above scheme are as follows: 1. The bearing detection module synchronously collects multi-dimensional data such as "surface temperature (thermal field), amplitude (force field), and vibration frequency (frequency domain field)," breaking through the limitations of traditional single-parameter monitoring.

[0042] By utilizing the standardization and normalization algorithm of Module 2, discrete physical quantities are transformed into a unified risk metric (standard state value), thus achieving: Accurate identification of complex faults (such as coupled failures of sudden temperature change and vibration frequency shift). Quantitative prediction of failure evolution trends (identifying bearing aging in advance by fitting curves of change rates). 2. Periodic speed adjustment test of the test module, constructing a digital twin model of "speed - parameter change rate" to achieve: Proactive detection of bearing health status (simulating extreme operating conditions to expose potential faults); Dynamic optimization of operation and maintenance strategies (adjusting fan speed and maintenance cycle based on fitted curves). → Compared to traditional passive maintenance, it can reduce bearing failure downtime by more than 60% and save maintenance costs by 40%.

[0043] 3. Determine the multi-parameter weighting formula for Module 3, accurately linking "thermal stress (temperature), mechanical stress (amplitude), resonance risk (frequency)" with fan speed to achieve: Thermal balance control: Under high-temperature conditions, reducing the speed decreases frictional heat generation and extends the life of bearing grease. Resonance avoidance: Dynamic adjustment of frequency weight (resonance zone weight increased to 2.5) to avoid critical speed operation and reduce bearing fatigue damage by 90%; 4. The multi-parameter collaborative early warning of the third early warning module, linked with the speed over-limit protection of the fourth early warning module, constructs a two-level blocking mechanism of "fault identification → speed limit → interlocking protection": Level 1 protection (early warning): Reduce speed in advance when parameters are abnormal to prevent the fault from escalating; Level 2 protection (frequency limiting): Forces the machine to stop when the speed exceeds the limit to prevent the bearing from seizing.

[0044] 5. Coordinated optimization of fan-bearing-environment By determining the dynamic speed calculation in module three, the following can be achieved: Balancing heat dissipation requirements with bearing safety (in high-temperature environments, prioritize bearing protection and appropriately reduce heat dissipation power). Balancing energy consumption and reliability (under non-extreme operating conditions, maintaining a high rotation speed through weight optimization to ensure heat dissipation efficiency).

[0045] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A heat dissipation system, characterized in that, It includes a structure to improve the lifespan of a cooling fan, and also includes: Temperature detection module one: used to detect the surface temperature of the target electrical device; the target electrical device is the electrical device in the wireless charger that dissipates heat through the fan body; each target electrical device corresponds to one temperature detection module one; The control device is electrically connected to the temperature detection module and the fan body. The control device includes: Evaluation module: Used to periodically determine the standard temperature state value of each target electrical device for the corresponding set time period based on the detection value of the temperature monitoring module within the current set time period. First warning module: used to issue a first warning when the temperature standard state value of any target electrical device for a set time period is greater than the preset first standard state value; Second warning module: Used to issue a second warning when the first warning module issues a warning and the fan body operates for a set period of time. Also includes: Temperature detection module 2: Used to detect the ambient temperature outside the wireless charger; Wind speed detection module: used to detect the wind speed at the air outlet of the fan body; The control device is electrically connected to the temperature detection module 2 and the wind speed detection module respectively. The control device further includes: Module 1: Used to obtain the battery information of the phone being charged within the current set time period, and to obtain the battery segment-average charging power mapping table of the phone being charged. Module 2: Used to obtain the fitting curve of the air speed at the air outlet of the fan body and the theoretical heat dissipation efficiency of the target electrical component. The heat dissipation efficiency of the target electrical component is the ratio of the heat dissipation power of the target electrical component to the heat dissipation power at the fan body. Module 3: Used to obtain the actual heat dissipation efficiency of each target electrical component on the fan body for a set heat dissipation duration of one. Determine Module 1: Based on the acquisition modules 1, 2, and 3, the temperature detection value of the current set duration 1 by module 2, and the current set duration 1 temperature standard state value of each target electrical device, determine the target heat dissipation power at the fan body corresponding to the next set duration 1 for each target electrical device; And select the maximum target heat dissipation power at the fan body as the required heat dissipation power for the next set duration of the fan body; Control module: Used to control the fan body to work for the next set time period based on the required cooling power of the fan body for the next set time period; The structure for improving the lifespan of a cooling fan includes a fan body, which is disposed inside a wireless charger (5). The fan body includes a fan hall element (1) and a sliding bearing (2), and further includes: the bearing sleeve opening of the sliding bearing (2) is arranged facing upward; the fan hall element (1) is away from the strong magnet (3) of the wireless charger (5).

2. The heat dissipation system according to claim 1, characterized in that: The fan body is a brushless motor fan.

3. The heat dissipation system according to claim 1, characterized in that: The strong magnet (3) is made of neodymium iron boron. The strong magnet (3) is located in the upper part of the wireless charger (5) and is used to fix the mobile phone (4) and the wireless charger (5) so that the mobile phone (4) is attracted and aligned with the wireless charger (5) when charging.

4. A heat dissipation system according to claim 1, characterized in that: The fan body includes a stator, a rotor, and a fan Hall element (1). The fan Hall element (1) realizes the fan current commutation based on the sensed rotor magnetic field signal, thereby driving the fan blades on the rotor to rotate. The sliding bearing (2) is used to support the rotor of the fan body. The sliding bearing (2) adopts an oil-impregnated sliding bearing structure.

5. A heat dissipation system according to claim 1, characterized in that, The control device includes: the evaluation module calculates based on the following formula: ； in, The temperature standard state value for the k-th set duration of the i-th target electrical device; The average detection value of the last M detection values ​​of the temperature detection module 1 within the k-th set time period of the i-th target electrical device; Let be the maximum allowable temperature of the i-th target electrical component; ； This is the temperature state value compensation coefficient; for The corresponding baseline value.

6. A heat dissipation system according to claim 1, characterized in that, The determining module one includes: Determining Unit 1: Used to determine the total target heat dissipation power of each target electrical device for the next set time period based on the average detection value of the last M detection values ​​of the temperature detection module 1 within the current set time period 1 from the acquisition module 1. Unit 2: Used to determine the target heat dissipation power at the fan body corresponding to the next set time period of each target electrical device based on the total target heat dissipation power of the next set time period of each target electrical device, the acquisition module 2, the acquisition module 3, the current set time period of each target electrical device's temperature standard state value, and the current set time period of the temperature detection module 2's detection value.

7. A heat dissipation system according to claim 1, characterized in that, It also includes an intelligent early warning device, which comprises: Bearing testing module: used to test the key parameters of sliding bearings (2); key parameters include: surface temperature, amplitude and vibration frequency; Module 2: Used to determine the current standard state value of each key parameter based on the current key parameter detection value of the sliding bearing (2); The third early warning module is used to issue an early warning when the current standard state value of any key parameter is not within the corresponding allowable range. Test module: Used to periodically perform a fan speed adjustment test. Each test fan speed is tested for a set duration of two. The test module determines the fitting curve of the average unit time standard state value change rate of the fan body speed and key parameters corresponding to the fan speed adjustment test, and calibrates the average unit time standard state value change rate of each test fan speed. Determine Module 3: Used to determine the current target maximum allowable speed of the fan body based on Determine Module 2 and the Test Module when the third warning module issues a warning; The fourth early warning module is used to issue an early warning when the actual speed of the fan body is greater than or equal to the current target maximum allowable speed of the fan body.

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