A cooling fan assembly, a vehicle, and a control method of the cooling fan assembly

Abstract

This application provides a cooling fan assembly, a vehicle, and a control method for the cooling fan assembly. The cooling fan assembly includes: a shroud; a drive assembly connected to the shroud; a fan assembly connected to the output end of the drive assembly, the drive assembly driving the fan assembly to rotate; and a temperature detection assembly connected to at least one of the drive assembly and the shroud, the temperature detection assembly being used to detect the ambient temperature of the fan assembly's operating environment. The drive assembly in this application dynamically adjusts its output power or speed according to temperature changes, enabling the fan assembly to maintain sufficient airflow and cooling efficiency even under high-temperature conditions, thereby solving the problem of the cooling fan assembly's performance not being fully utilized due to increased ambient temperature.

Description

Technical Field

[0001] This application relates to the technical field of cooling fans, and more specifically, to a cooling fan assembly, a vehicle, and a control method for the cooling fan assembly. Background Technology

[0002] In existing technologies, with the continuous development of hybrid and electrified vehicle designs, the heat exchange requirements of the vehicle's thermal management system are constantly increasing. Simultaneously, the effective air intake area of ​​the front-end heat exchange module is continuously decreasing. As the ambient temperature rises and air density decreases, the fan load decreases, and the cooling fan's performance cannot be fully utilized. Because the performance of current cooling fan assemblies has not been further developed and improved, the only way to compensate for the increasing heat exchange requirements and the negative impact of the shrinking air intake area is to further increase the cooling fan power (from 650W to 1000W), leading to increased product costs and decreased vehicle competitiveness.

[0003] There is currently no effective solution to the aforementioned technical problems. Summary of the Invention

[0004] This application provides a cooling fan assembly, a vehicle, and a control method for the cooling fan assembly, aiming to improve the problem that the performance of the cooling fan in the prior art cannot be fully utilized.

[0005] According to one aspect of the embodiments of this application, a cooling fan assembly is provided, including: a shroud; a drive assembly connected to the shroud; a fan assembly connected to the output end of the drive assembly, the drive assembly being capable of driving the fan assembly to rotate; and a temperature detection assembly connected to at least one of the drive assembly and the shroud, the temperature detection assembly being used to detect the ambient temperature of the working environment of the fan assembly.

[0006] The embodiments of this application achieve the following technical effects: By connecting the drive component to the shroud and the fan component to the output end of the drive component, the fan component can be driven to rotate by the drive component, thereby achieving heat dissipation. By connecting the temperature detection component to at least one component in the drive component or the shroud, the temperature detection component can sense the ambient temperature of the working environment of the fan component. When the ambient temperature rises, the temperature detection component collects temperature data in real time, and the drive component dynamically adjusts the output power or speed according to the temperature change, so that the fan component can still maintain sufficient airflow and cooling efficiency under high temperature conditions, thereby solving the problem that the performance of the cooling fan assembly cannot be fully utilized due to the rise in ambient temperature.

[0007] Furthermore, the temperature sensing component is electrically connected to the driving component so that the driving component receives the output signal from the temperature sensing component.

[0008] The embodiments of this application achieve the following technical effects: by directly transmitting the ambient temperature signal to the drive component through the temperature detection component, the signal transmission time can be saved. The drive component can quickly adjust the fan speed based on real-time temperature data, improve the cooling response speed and control accuracy under high temperature conditions, and can instantly increase the fan speed to prevent the thermal management system from overheating.

[0009] Furthermore, the wind shield has an assembly hole, at least part of the fan assembly is located in the assembly hole, the fan assembly is rotatably arranged relative to the assembly hole in the axial direction of the assembly hole, the wind shield has an air inlet side and an air outlet side arranged opposite to each other in the axial direction of the assembly hole, wherein there is a height difference h between the edge of the assembly hole on the air inlet side and the outer contour line of the fan assembly near the air inlet side, 1mm≤h≤25mm.

[0010] The embodiments of this application achieve the following technical effects: by providing mounting holes in the shroud, the fan assembly can be rotatably set relative to the mounting holes in the axial direction of the mounting holes, reducing the diffusion of airflow to all directions, ensuring more air is directed to the radiator, and improving the overall cooling efficiency. By setting a height difference h between the edge of the mounting hole on the air intake side and the outer contour line of the fan assembly near the air intake side, the airflow is guided to enter the fan blade area more concentratedly, so that the airflow acts more evenly on the leading edge of the fan blades, thereby reducing the overall noise level of the fan. At the same time, it can significantly improve the quality of air entering the fan per unit time, thereby increasing the air volume.

[0011] Furthermore, 11mm≤h≤18mm.

[0012] The embodiments of this application achieve the following technical effects: setting h in the range of 11mm to 18mm not only significantly improves the air volume, but also avoids the risk of increased turbulence on the wall of the wind shield 2. At the same time, the vibration amplitude of the fan blades is small in the range of 11mm to 18mm.

[0013] Furthermore, the wind shield includes: a wind shield body, which is connected to the drive assembly; and a connector, which is connected to the wind shield body. Multiple connectors are arranged at circumferential intervals along the wind shield body. Each connector includes a connector portion for insertion into the connector space of the radiator. At least one connector also has an auxiliary assembly portion located on the outer circumferential surface of the connector portion. The cross-sectional area of ​​the auxiliary assembly portion gradually increases in the direction away from the end of the connector portion.

[0014] The embodiments of this application achieve the following technical effects: By arranging multiple plug-in parts at intervals along the circumference of the main body of the wind shield, the wind shield and the radiator can be precisely aligned during assembly, ensuring continuous airflow. By inserting the plug-in part into the plug-in space of the radiator, the torsional deformation of the wind shield during high-speed fan rotation is effectively constrained. The plug-in structure can absorb high-frequency vibration energy and reduce the NVH noise level of the entire vehicle. By providing an auxiliary assembly part for at least one plug-in part, and setting the cross-sectional area of ​​the auxiliary assembly part to gradually increase along the direction away from the end of the plug-in part, the plug-in part can automatically slide into the target position, significantly reducing the difficulty of manual or automated assembly. At the same time, during the plug-in process, there is a certain interference fit between the cooling fan assembly and the opposite part, which plays a role in reducing vibration. The smooth transition of the auxiliary assembly part can reduce jamming and abnormal noise.

[0015] Furthermore, the plurality of connectors include at least a first connector and a second connector arranged opposite to each other along the length of the windshield body, and both the first connector and the second connector are provided with auxiliary assembly parts.

[0016] The embodiments of this application achieve the following technical effects: by arranging the first and second plug-in parts relative to each other along the length of the main body of the shroud, the heat sink insertion space applies a bidirectional torque to the shroud during assembly, achieving precise positioning and ensuring that the fan and the airflow channel of the heat sink are coaxial. By providing auxiliary assembly parts for the first and second plug-in parts, airflow disturbance is reduced, ensuring stable cooling performance output. During the insertion process, there is a certain interference fit between the cooling fan assembly and the opposite part, which helps to reduce vibration.

[0017] Furthermore, the auxiliary assembly part includes a wedge-shaped structure.

[0018] The embodiments of this application achieve the following technical effects: by setting the assembly part into a wedge-shaped structure with a certain gradient, the connector can automatically be inserted through the inclined surface during the insertion process. There is a certain interference fit between the cooling fan assembly and the connector, which reduces vibration. Self-locking can be achieved without additional clips, avoiding abnormal noise during the assembly process and improving the NVH performance of the vehicle.

[0019] Furthermore, the fan assembly includes: a hub connected to the output end of the drive assembly; a connecting ring disposed on the outside of the hub, and multiple fan blades disposed between the connecting ring and the hub; wherein the multiple fan blades are spaced apart along the circumference of the hub, and the spacing between at least two adjacent fan blades is unequal.

[0020] The embodiments of this application achieve the following technical effects: By setting multiple fan blades between the connecting cover ring and the rotating hub, stress concentration at the blade root can be reduced, blade rigidity can be improved, and airflow attenuation caused by blade deformation can be avoided. The connecting cover ring ensures the consistency of the fan blade installation angle, so that the airflow is evenly distributed, effectively avoiding noise caused by airflow fluctuations. By arranging multiple fan blades at circumferential intervals along the rotating hub, and setting the spacing between at least two adjacent fan blades unequal, the risk of structural resonance can be reduced.

[0021] Furthermore, the wind shield is equipped with multiple air dampers.

[0022] The embodiments of this application achieve the following technical effects: by setting multiple air dampers on the wind shield, some air dampers can be closed under low load conditions to reduce air intake and reduce fan load. Under high temperature conditions, the air dampers are opened to expand the air intake area and significantly increase the air intake volume.

[0023] According to another aspect of the embodiments of this application, a vehicle is provided, including a cooling fan assembly, which is the cooling fan assembly described above.

[0024] The embodiments of this application achieve the following technical effects: By connecting the drive component to the wind shield, the drive component drives the fan component to rotate, thereby realizing the heat dissipation function. The temperature detection component can sense the ambient temperature of the working environment of the fan component. When the ambient temperature rises, the temperature detection component collects temperature data in real time and feeds it back to the drive component. The drive component dynamically adjusts the output power or speed according to the temperature change, so that the fan component can still maintain sufficient airflow and cooling efficiency under high temperature conditions. This solves the problem that the cooling fan assembly cannot fully perform due to the rise in ambient temperature, ensuring that key components such as the engine and battery in the vehicle always operate within the optimal temperature range, improving the energy efficiency and durability of the whole vehicle. Precise temperature control avoids the fan from running at high speed for a long time, effectively reducing noise and vibration at the mounting point, significantly improving driving comfort, and reducing system load, thereby improving the energy utilization efficiency of the whole vehicle.

[0025] According to another aspect of the embodiments of this application, a control method for a cooling fan assembly is provided. The control method is used to control the cooling fan assembly described above. The control method includes the following steps: acquiring ambient temperature information, actual internal temperature information of the controller, load information, and speed information of the cooling fan assembly, wherein the actual internal temperature information of the controller is used to characterize the actual internal temperature of the controller of the drive component of the cooling fan assembly; determining the internal calibration temperature information of the controller of the cooling fan assembly based on the ambient temperature information, load information, and speed information, wherein the internal calibration temperature information of the controller is used to characterize the internal calibration temperature of the controller of the drive component of the cooling fan assembly; and determining a speed adjustment strategy for the cooling fan assembly based on the internal calibration temperature information and the actual internal temperature information of the controller.

[0026] This application's embodiments achieve the following technical effects: It acquires the operating environment temperature information, actual internal temperature information, load information, and speed information of the cooling fan assembly, wherein the actual internal temperature information of the controller is used to characterize the actual internal temperature of the drive component of the cooling fan assembly; based on the operating environment temperature information, load information, and speed information, it determines the internal calibration temperature information of the cooling fan assembly's controller, which is used to characterize the internal calibration temperature of the drive component of the cooling fan assembly's controller; based on the internal calibration temperature information and the actual internal temperature information of the controller, it determines the speed adjustment strategy of the cooling fan assembly. Specifically, by determining the internal calibration temperature information of the controller based on the actual operating environment temperature information, load information, and speed information, and then comparing the internal calibration temperature with the actual internal temperature information, the operating status of the cooling fan assembly under the current operating environment temperature, current load, and current speed can be determined, thereby adjusting the speed of the cooling fan assembly and improving its performance in high-temperature environments. This allows the performance of the cooling fan assembly to be adaptively adjusted under different operating environment temperatures, effectively improving the working performance of the cooling fan assembly. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 This is a diagram of a cooling fan assembly provided in one embodiment of this application;

[0029] Figure 2 This is a structural diagram of a wind shield provided in one embodiment of this application;

[0030] Figure 3 This is a schematic diagram of point I in the wind shield structure provided in one embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the structure between the fan and the wind shield provided in one embodiment of this application;

[0032] Figure 5 This is an experimental diagram illustrating the effect of h on airflow performance provided in one embodiment of this application;

[0033] Figure 6 This is a flowchart illustrating the control method steps for a cooling fan assembly provided in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Fan assembly;

[0036] 2. Windshield;

[0037] 200. Assembly hole;

[0038] 21. Main body of the wind shield;

[0039] 22. Connector; 221. Connecting part; 222. Auxiliary assembly part;

[0040] 3. Temperature detection component;

[0041] 4. Driver components;

[0042] 5. Motor rotor; 6. Hub; 7. Fan blades; 8. Connecting cover ring; 9. Damper;

[0043] 10. First mounting connection point; 11. Second mounting connection point;

[0044] 12. First connector; 13. Second connector;

[0045] 14. Spokes. Detailed Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0050] With the continuous development of hybrid and electrified vehicle designs, the heat exchange requirements of vehicle thermal management systems are constantly increasing, while the effective air intake area of ​​front-end heat exchange modules is continuously decreasing, posing a significant challenge to meeting the performance standards of vehicle thermal management systems. Meanwhile, with the deepening of consumption upgrades, customers' demands for overall vehicle ride comfort are also rising. Simply increasing the power of cooling fans to compensate for the increasing heat exchange requirements will lead to a severe deterioration of the vehicle's NVH performance, increased product costs, and a decline in the vehicle's overall competitiveness.

[0051] Combination Figures 1 to 4 As shown, according to a specific embodiment of this application, a cooling fan assembly is provided.

[0052] The cooling fan assembly includes a shroud 2, a drive assembly 4, a fan assembly 1, and a temperature detection assembly 3; the drive assembly 4 is connected to the shroud 2; the fan assembly 1 is connected to the output end of the drive assembly 4, and the drive assembly 4 can drive the fan assembly 1 to rotate; the temperature detection assembly 3 is connected to at least one of the drive assembly 4 and the shroud 2, and the temperature detection assembly 3 is used to detect the ambient temperature of the working environment of the fan assembly 1.

[0053] The embodiments of this application achieve the following technical effects: By connecting the drive component 4 to the wind shield 2 and the fan component 1 to the output end of the drive component 4, the fan component 1 can be rotated by the drive component 4, thereby achieving the heat dissipation function. By connecting the temperature detection component 3 to at least one of the drive component 4 or the wind shield 2, the temperature detection component 3 can sense the ambient temperature of the working environment of the fan component 1. When the ambient temperature rises, the temperature detection component 3 collects temperature data in real time, and the drive component 4 dynamically adjusts the output power or speed according to the temperature change, so that the fan component 1 can still maintain sufficient airflow and cooling efficiency under high temperature conditions, thereby solving the problem that the performance of the cooling fan assembly cannot be fully utilized due to the rise in ambient temperature.

[0054] It should be understood that the output signal of the temperature detection component 3 can be directly transmitted to the drive component 4 for real-time adjustment of its output. Alternatively, both the temperature detection component 3 and the drive component 4 can be electrically connected to external control components such as the vehicle controller. These external control components determine the adjustment method of the drive component 4 based on the output signal of the temperature detection component 3 and the operating condition signal of the drive component 4, and then send the adjustment command to the drive component 4. Signal transmission can be achieved via wired or wireless connections.

[0055] The temperature detection component 3 may include one or more temperature sensors to obtain accurate operating ambient temperature.

[0056] Preferably, the temperature detection component 3 is electrically connected to the drive component 4 so that the drive component 4 receives the output signal of the temperature detection component 3.

[0057] The embodiments of this application achieve the following technical effects: the ambient temperature signal is directly transmitted to the drive component 4 through the temperature detection component 3, which can save signal transmission time. The drive component 4 can quickly adjust the fan speed based on real-time temperature data, improve the cooling response speed and control accuracy under high temperature conditions, and can instantly increase the fan speed to prevent the thermal management system from overheating.

[0058] Specifically, the wind shield 2 has an assembly hole 200, and at least part of the fan assembly 1 is located in the assembly hole 200. The fan assembly 1 is rotatably arranged relative to the assembly hole 200 in the axial direction of the assembly hole 200. The wind shield 2 has an air inlet side and an air outlet side arranged opposite to each other in the axial direction of the assembly hole 200. There is a height difference h between the edge of the assembly hole 200 on the air inlet side and the outer contour line of the fan assembly 1 near the air inlet side, where 1mm≤h≤25mm.

[0059] The embodiments of this application achieve the following technical effects: by providing an assembly hole 200 in the wind shield 2, the fan assembly 1 can be rotatably set relative to the assembly hole 200 in the axial direction around the assembly hole 200, reducing the diffusion of airflow to all sides, ensuring more air is directed to the radiator, and improving the overall cooling efficiency. By setting a height difference h between the edge of the assembly hole 200 on the air inlet side and the outer contour line of the fan assembly 1 near the air inlet side, the airflow is guided to enter the fan blade area more concentratedly, so that the airflow acts more evenly on the leading edge of the fan blade, thereby reducing the overall noise level of the fan. At the same time, it can significantly improve the quality of air entering the fan per unit time, thereby increasing the air volume.

[0060] Specifically, h can be 1mm, 3mm, 5mm, 7mm, 10mm, 11mm, 15mm, 18mm, 19mm, 20mm, 22mm, or 25mm.

[0061] Optionally, 11mm ≤ h ≤ 18mm.

[0062] The embodiments of this application achieve the following technical effects: setting h in the range of 11mm to 18mm not only significantly improves the air volume, but also avoids the risk of increased turbulence on the wall of the wind shield 2. At the same time, the vibration amplitude of the fan blades is small in the range of 11mm to 18mm.

[0063] Specifically, h can be 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, or 18mm.

[0064] Furthermore, the wind shield 2 includes: a wind shield body 21 and a connector 22, the wind shield body 21 being connected to the drive assembly 4; the connector 22 is connected to the wind shield body 21, and there are multiple connectors 22, which are spaced apart circumferentially along the wind shield body 21. Each connector 22 includes a connector portion 221 for insertion into the connector space of the radiator; wherein at least one connector 22 is also provided with an auxiliary assembly portion 222, which is disposed on the outer peripheral surface of the connector portion 221, and the cross-sectional area of ​​the auxiliary assembly portion 222 gradually increases in the direction away from the end of the connector portion 221.

[0065] The embodiments of this application achieve the following technical effects: By arranging multiple plug-in parts 22 at intervals along the circumference of the main body 21 of the wind shield, the wind shield 2 and the radiator can be precisely aligned during assembly, ensuring continuous airflow. By using the plug-in part 221 to insert into the plug-in space of the radiator, the torsional deformation of the wind shield when the fan rotates at high speed is effectively constrained. The plug-in part 22 can absorb high-frequency vibration energy and reduce the overall vehicle NVH (Noise, Vibration, Harshness) noise level. By providing an auxiliary assembly part 222 for at least one plug-in part 22, and the cross-sectional area of ​​the auxiliary assembly part 222 gradually increases along the direction away from the end of the plug-in part 221, the plug-in part 221 can automatically slide into the target position, significantly reducing the difficulty of manual or automated assembly. At the same time, during the plugging process, there is a certain interference fit between the cooling fan assembly and the other part, which plays a role in reducing vibration. The smooth transition of the auxiliary assembly part 222 can reduce jamming and abnormal noise.

[0066] Furthermore, the plurality of connectors 22 include at least a first connector 12 and a second connector 13 arranged opposite to each other along the length direction of the windshield body 21, and both the first connector 12 and the second connector 13 are provided with auxiliary assembly parts 222.

[0067] The embodiments of this application achieve the following technical effects: by arranging the first connector 12 and the second connector 13 opposite each other along the length of the shroud body 21, the heat sink insertion space applies a bidirectional torque to the shroud 2 during assembly, achieving precise positioning and ensuring that the fan and the airflow channel of the heat sink are coaxial. By providing auxiliary assembly parts 222 on the first connector 12 and the second connector 13, airflow disturbance is reduced, ensuring stable cooling performance. During the insertion process, there is a certain interference fit between the output cooling fan assembly and the opposite component, which reduces vibration.

[0068] In one exemplary embodiment of this application, such as Figure 1 As shown, both the insertion part 221 and the auxiliary assembly part 222 extend along the width direction of the wind shield body 21. The wind shield body 21 moves downward along the width direction of the wind shield 21 so that the insertion part 22 is inserted downward into the insertion space of the radiator. The first insertion part 12 and the second insertion part 13 are both located near the bottom of the wind shield body 21 in the width direction. Ordinary insertion structures can also be provided on both sides of the wind shield body 21 in the length direction to strengthen the connection between the wind shield body 21 and the radiator.

[0069] In other embodiments, a connector 22 with an auxiliary assembly portion 222 may be provided at the top in the width direction near the wind shield body 21 to further improve the connection stability.

[0070] Furthermore, the auxiliary assembly part 222 includes a wedge-shaped structure.

[0071] The embodiments of this application achieve the following technical effects: by setting the auxiliary assembly part 222 into a wedge-shaped structure with a certain gradient, the plug-in part can be automatically aligned with the inclined surface during the insertion process. There is a certain interference fit between the cooling fan assembly and the counter part, which reduces vibration. Self-locking can be achieved without additional clips, avoiding abnormal noise during the assembly process and improving the NVH performance of the vehicle.

[0072] Alternatively, in other embodiments, the auxiliary assembly part 222 may also be an elastic snap, axial rubber, or shock-absorbing block.

[0073] Specifically, the fan assembly 1 includes a hub 6 and a connecting ring 8. The hub 6 is connected to the output end of the drive assembly 4. The connecting ring 8 is located on the outside of the hub 6, and a plurality of fan blades 7 are arranged between the connecting ring 8 and the hub 6. The plurality of fan blades 7 are arranged at intervals along the circumference of the hub 6, and the spacing between at least two adjacent fan blades 7 is unequal.

[0074] The embodiments of this application achieve the following technical effects: By providing multiple fan blades 7 between the connecting ring 8 and the hub 6, stress concentration at the blade root can be reduced, blade rigidity can be improved, and airflow attenuation caused by blade deformation can be avoided. The connecting ring 8 ensures the consistency of the installation angle of the fan blades 7, so that the airflow is evenly distributed, effectively avoiding noise caused by airflow fluctuations. By arranging multiple fan blades 7 at circumferential intervals along the hub 6, and setting the spacing between at least two adjacent fan blades 7 unequal, the risk of structural resonance can be reduced.

[0075] Preferably, the wind shield 2 is provided with multiple air dampers 9.

[0076] The embodiments of this application achieve the following technical effects: by setting multiple dampers 9 on the wind shield 2, some dampers can be closed under low load conditions to reduce air intake and reduce fan load. In high temperature environments, the dampers automatically open to expand the air intake area and significantly increase the air intake volume.

[0077] This application also provides a vehicle including a cooling fan assembly, the cooling fan assembly being the aforementioned cooling fan assembly.

[0078] The embodiments of this application achieve the following technical effects: By connecting the drive component 4 to the wind shield 2, the drive component 4 drives the fan component 1 to rotate, thereby realizing the heat dissipation function. The temperature detection component 3 can sense the ambient temperature of the working environment of the fan component 1. When the ambient temperature rises, the temperature detection component 3 collects temperature data in real time and feeds it back to the drive component 4. The drive component 4 dynamically adjusts the output power or speed according to the temperature change, so that the fan component 1 can still maintain sufficient airflow and cooling efficiency under high temperature conditions. This solves the problem that the cooling fan assembly cannot fully perform due to the rise in ambient temperature, ensuring that key components such as the engine and battery in the vehicle always operate within the optimal temperature range, improving the energy efficiency and durability of the vehicle. By accurately controlling the temperature, the fan is prevented from running at high speed for a long time, effectively reducing noise and vibration at the mounting point, significantly improving driving comfort, reducing system load, and improving the energy utilization efficiency of the vehicle.

[0079] This application also provides a control method for a cooling fan assembly, the control method being used to control the aforementioned cooling fan assembly, such as... Figure 6 As shown, the control method includes the following steps:

[0080] Step S1: Obtain the operating ambient temperature information, actual internal temperature information of the controller, load information and speed information of the cooling fan assembly. The actual internal temperature information of the controller is used to characterize the actual internal temperature of the controller of the drive component of the cooling fan assembly.

[0081] In step S1, the controller is the internal controller of the aforementioned drive component. The drive component can be a motor. The actual temperature inside the controller is obtained by a temperature detection device (such as a temperature sensor) installed inside the drive component. The ambient temperature information is obtained by the aforementioned temperature detection component 3. The load information can be obtained in real time based on the vehicle detection element or directly from the outside. The speed information can be determined in real time or directly obtained from the motor output information. By obtaining the actual temperature inside the controller, the thermal fatigue state of the fan system under high load can be obtained, avoiding performance degradation caused by controller overheating. When the ambient temperature rises, the speed of the fan component 1 can be increased by obtaining the temperature information to compensate for the air volume reduction, thereby improving the cooling performance of the fan system.

[0082] Step S2: Based on the operating environment temperature information, load information and speed information, determine the internal calibration temperature information of the controller of the cooling fan assembly. The internal calibration temperature information of the controller is used to characterize the internal calibration temperature of the controller of the drive component of the cooling fan assembly.

[0083] In step S2, by acquiring the ambient temperature, load, and speed information of the cooling fan assembly, the internal calibration temperature of the controller can be determined. The internal calibration temperature of the controller is a theoretical value, which is determined based on the correspondence determined by fitting the ambient temperature, load, speed, and internal temperature of the controller in advance. Different combinations of ambient temperature, load, and speed information have their own corresponding internal calibration temperatures of the controller.

[0084] Step S3: Based on the internal calibration temperature information and the actual internal temperature information of the controller, determine the speed adjustment strategy of the cooling fan assembly.

[0085] In step S3, by comparing the internal calibrated temperature of the controller with the actual internal temperature of the controller, the current overheating level of the controller can be determined, and then the speed adjustment strategy can be determined. For example, when the actual internal temperature of the controller is higher than the internal calibrated temperature of the controller, the system can increase the fan speed to accelerate heat dissipation. When the actual internal temperature of the controller is lower than the internal calibrated temperature of the controller, it indicates that the heat dissipation is sufficient, and the system can appropriately reduce the fan speed to reduce power consumption and improve the overall vehicle energy efficiency.

[0086] This application's embodiments achieve the following technical effects: It acquires the operating environment temperature information, actual internal temperature information, load information, and speed information of the cooling fan assembly, wherein the actual internal temperature information of the controller is used to characterize the actual internal temperature of the drive component of the cooling fan assembly; based on the operating environment temperature information, load information, and speed information, it determines the internal calibration temperature information of the cooling fan assembly's controller, which is used to characterize the internal calibration temperature of the drive component of the cooling fan assembly's controller; based on the internal calibration temperature information and the actual internal temperature information of the controller, it determines the speed adjustment strategy of the cooling fan assembly. Specifically, by determining the internal calibration temperature information of the controller based on the actual operating environment temperature information, load information, and speed information, and then comparing the internal calibration temperature with the actual internal temperature information, the operating status of the cooling fan assembly under the current operating environment temperature, current load, and current speed can be determined, thereby adjusting the speed of the cooling fan assembly and improving its performance in high-temperature environments. This allows the performance of the cooling fan assembly to be adaptively adjusted under different operating environment temperatures, effectively improving the working performance of the cooling fan assembly.

[0087] This application also provides a cooling fan assembly, and particularly relates to a high-performance cooling fan assembly and its control method.

[0088] Specifically, such as Figures 1 to 4 As shown, the technical solution of this application embodiment is as follows: The cooling fan assembly consists of a fan assembly 1, a fan shield 2, a temperature detection assembly 3, a drive assembly 4, etc. The fan assembly 1 is fixed to the motor rotor 5 and rotates with it; the fan assembly 1 consists of a hub 6, fan blades 7, and a connecting cover ring; the fan shield 2 consists of a fan shield body 21 and several air dampers 9; the temperature detection assembly 3 is fixed to the middle of the rear end of the fan shield 2; the drive assembly 4 consists of a motor rotor 5, a stator, a base, a circuit board, a rear cover, a wiring harness assembly, etc.

[0089] Specifically, the fan blades of the fan assembly 1 are arranged at unequal intervals, and the wind shield 2 consists of a wind shield body 21 and several air dampers 9. The air inlet surface of the wind shield is a fluid-shaped curved surface. Figure 1 As shown, wedge-shaped structures can be provided at the first mounting connection point 10, the second mounting connection point 11, the first connector 12, and the second connector 13, so that there is a certain interference fit between the cooling fan assembly and the opposing components, which reduces vibration. The cross-section of the wedge-shaped structure is shown in the figure. Figures 2 to 3 As shown. Considering the ease of disassembly and assembly of the cooling fan assembly, this structure is preferably installed at the lower part of the cooling fan shroud, specifically at the first connector 12 and the second connector 13.

[0090] Furthermore, to incorporate the operating ambient temperature of the cooling fan assembly as a control parameter and improve airflow performance, a temperature detection component 3 is installed on the inlet or outlet side of the cooling fan assembly. Considering the limitations of the fan's structure and the accuracy of reflecting the actual operating ambient temperature, the temperature detection component 3 is preferably located in the middle of the rear end of the fan guard 2, i.e., in the middle local area where the drive assembly 4 is located, or on the spokes 14. The temperature detection component 3 is a temperature sensor internally connected to the drive assembly 4. The drive assembly 4 consists of a motor rotor 5, a stator, a base, a circuit board, a rear cover, and a wiring harness assembly.

[0091] Preferably, the fan assembly 1 is composed of several fan blades 7 connected by a hub 6 and a connecting cover ring 8. The fan assembly 1 is fixed to the motor rotor 5 and rotates with it. The air shield 2 consists of an air shield body 21 and several air dampers 9, which are used to fix the drive assembly 4 and to connect and install it with the heat sink of the component. The temperature detection assembly 3 is installed in the middle of the rear end of the air shield 2 and connected to the internal wiring harness of the motor. The fan assembly 1 rotates under the action of the magnetic field between the motor rotor 5 and the internal coil of the motor. Among them, the fan assembly 1, the air shield 2, the temperature detection assembly 3, and the drive assembly 4 are all essential.

[0092] Preferably, such as Figure 4 As shown, h refers to the axial height difference between the fan assembly 1 and the shroud 2, which has a significant impact on the airflow distribution generated by the cooling fan, and thus affects the final airflow performance of the cooling fan assembly. h can be set within the range of 1mm to 25mm. Experimental studies have shown that... Figure 5 As shown, considering both layout space and airflow performance, h is preferably 11mm to 18mm to achieve the best balance between layout space and airflow performance. At the same time, the temperature detection component 3 is preferred to ensure performance when the working environment temperature is high.

[0093] Specifically, the working principle of the cooling fan assembly in this embodiment is as follows: the cooling fan assembly is connected to the vehicle via positive, negative, and signal lines, and operates under PWM (Pulse Width Modulation) or LIN (Local Interconnect Network) signal control. Under normal temperature conditions, the cooling fan assembly will reach an equilibrium state after a period of time under a specific load, and the internal temperature of the controller will also stabilize at a certain value. If the operating environment temperature of the cooling fan assembly is not taken into account, as the operating environment temperature rises, the air density decreases, leading to a decrease in fan load and consequently a decline in cooling fan performance. That is, at a constant fan speed, the decrease in air density reduces the fan's resistance in the air, thus affecting airflow performance. After introducing the operating ambient temperature of the cooling fan, the correspondence between the internal temperature of the cooling fan assembly controller and the ambient temperature, speed, and load can be obtained through calibration and expressed as: Ti = f(Te, Load, N), where Ti is the internal temperature of the cooling fan assembly controller (i.e., the aforementioned internal calibration temperature of the controller), Te is the operating ambient temperature of the cooling fan assembly, Load is the working load of the cooling fan assembly, and N is the speed of the cooling fan assembly. When the cooling fan assembly receives a demand request from the vehicle, the cooling fan assembly controller will combine the request with the calibrated correspondence between the internal temperature of the cooling fan assembly controller and the ambient temperature, speed, and load to ultimately determine the switching frequency of the three-phase circuit inside the cooling fan assembly controller. This causes the motor rotor 5 to obtain the corresponding speed and rotate, and then the motor rotor 5 drives the fan assembly 1 to rotate, thereby generating a certain airflow performance.

[0094] The technical solution of this application achieves the following effects:

[0095] 1) By introducing the operating environment temperature as a control parameter, the performance of the cooling fan assembly in high-temperature environments is improved by about 10%; by introducing the operating environment temperature signal, the performance of the cooling fan assembly when working in high-temperature environments is effectively utilized.

[0096] 2) By setting the important parameter h between the fan assembly 1 and the shroud 2 in the cooling fan assembly, the air intake volume of the high static pressure section of the cooling fan assembly is significantly improved: when the static pressure is 200Pa, the air intake volume is increased by about 7.5%; when the static pressure is 300Pa, the air intake volume is increased by about 12%; when the static pressure is 400Pa, the air intake volume is increased by about 35%. By setting the important structural parameter h between the fan assembly 1 and the shroud 2, the air volume performance of the cooling fan assembly is effectively improved, while effectively avoiding the deterioration of NVH performance caused by using a higher power fan.

[0097] 3) The wedge-shaped structure on the wind shield mounting surface effectively reduces the vibration of the cooling fan assembly: the vibration of the upper left mounting point is reduced by about 42%, the vibration of the lower left mounting point is reduced by about 37.5%, the vibration of the upper right mounting point is reduced by about 28%, and the vibration of the lower right mounting point is reduced by about 25%; the order noise of the cooling fan assembly is effectively reduced; the 9th order noise is reduced by 2dB; and the NVH performance of the whole vehicle is effectively improved.

[0098] In this application, "multiple" refers to two or more.

[0099] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0100] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0101] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0102] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

Claims

1. A cooling fan assembly, characterized by, include: Windproof cover (2); Drive assembly (4), which is connected to the wind shield (2); A fan assembly (1) is connected to the output end of the drive assembly (4), and the drive assembly (4) can drive the fan assembly (1) to rotate. Temperature detection component (3) is connected to at least one of the drive component (4) and the wind shield (2). The temperature detection component (3) is used to detect the ambient temperature of the working environment of the fan component (1).

2. The cooling fan assembly according to claim 1, characterized in that, The temperature detection component (3) is electrically connected to the driving component (4) so ​​that the driving component (4) receives the output signal of the temperature detection component (3).

3. The cooling fan assembly according to claim 1, characterized in that, The wind shield (2) has an assembly hole (200), at least part of the fan assembly (1) is located in the assembly hole (200), the fan assembly (1) is rotatably disposed relative to the assembly hole (200) in the axial direction of the assembly hole (200), the wind shield (2) has an air inlet side and an air outlet side disposed opposite to each other in the axial direction of the assembly hole (200), wherein there is a height difference h between the edge of the assembly hole (200) located on the air inlet side and the outer contour line of the fan assembly (1) near the air inlet side, 1mm≤h≤25mm.

4. The cooling fan assembly according to claim 3, characterized in that, 11mm≤h≤18mm.

5. The cooling fan assembly according to claim 1, characterized in that, The wind shield (2) includes: The wind shield body (21) is connected to the drive assembly (4); A connector (22) is connected to the wind shield body (21). There are multiple connectors (22), which are spaced apart around the circumference of the wind shield body (21). Each connector (22) includes a plug-in portion (221) for insertion into the plug-in space of the radiator. At least one of the plug-in members (22) is further provided with an auxiliary assembly part (222), which is disposed on the outer peripheral surface of the plug-in part (221), and the cross-sectional area of ​​the auxiliary assembly part (222) gradually increases along the direction away from the end of the plug-in part (221).

6. The cooling fan assembly according to claim 5, characterized in that, The plurality of plug-in parts (22) include at least a first plug-in part (12) and a second plug-in part (13) arranged opposite to each other along the length direction of the windshield body (21), and both the first plug-in part (12) and the second plug-in part (13) are provided with the auxiliary assembly part (222).

7. The cooling fan assembly according to claim 5, characterized in that, The auxiliary assembly part (222) includes a wedge-shaped structure.

8. The cooling fan assembly according to claim 1, characterized in that, The fan assembly (1) includes: A rotating hub (6) is connected to the output end of the drive assembly (4); A connecting cover ring (8) is provided on the outside of the rotating hub (6), and a plurality of fan blades (7) are provided between the connecting cover ring (8) and the rotating hub (6). The fan blades (7) are arranged at circumferential intervals along the hub (6), and the spacing between at least two adjacent fan blades (7) is unequal.

9. The cooling fan assembly according to claim 1, characterized in that, The wind shield (2) is provided with multiple air doors (9).

10. A vehicle, characterized in that, Includes a cooling fan assembly, said cooling fan assembly being the cooling fan assembly according to any one of claims 1-9.

11. A control method for a cooling fan assembly, characterized in that, The control method is used to control the cooling fan assembly according to any one of claims 1-9, and the control method includes the following steps: The system acquires the operating ambient temperature information, the actual internal temperature information of the controller, the load information, and the speed information of the cooling fan assembly. The actual internal temperature information of the controller is used to characterize the actual internal temperature of the controller of the drive component of the cooling fan assembly. Based on the operating environment temperature information, the load information, and the speed information, the internal calibration temperature information of the controller of the cooling fan assembly is determined. The internal calibration temperature information of the controller is used to characterize the internal calibration temperature of the controller of the drive component of the cooling fan assembly. Based on the internal calibration temperature information and the actual internal temperature information of the controller, the speed adjustment strategy of the cooling fan assembly is determined.

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