Automobile cooling fan device

Abstract

The invention relates to an automobile cooling fan structure. An automobile cooling fan device comprises a fan frame, an impeller type motor is installed in the center of the fan frame, the impeller type motor comprises a stator, an impeller rotor and a controller, the impeller rotor comprises an impeller and a rotor assembly located in the center of the impeller, and the rotor assembly comprises a rotor shell. The end face of the rotor shell is provided with an air hole structure, and the air hole structure forms an air guide space in the axial direction. The invention provides an automobile cooling fan device which is good in cooling effect and high in reliability. The technical problem that in the prior art, an automobile cooling fan structure is not ideal in cooling effect is solved.

Description

Technical Field

[0001] The invention relates to an automobile cooling fan structure. Background Art

[0002] The car fan is an important part of the car engine cooling / vehicle thermal management system. Its function is to discharge the hot air after the coolant passes through the radiator, keep the temperature of the engine / motor, battery, electronic control system, etc. within a suitable range, and avoid damage to the engine / motor, battery, electronic control system, etc. due to overheating. The car fan is of great significance to ensure the safety, reliability and stability of vehicle driving.

[0003] A conventional fan device includes a fan frame, a motor mounted on the fan frame, and an impeller mounted on the motor. The fan frame includes a base, an outer frame, and ribs connecting the base to the outer frame. The motor includes a stator, a rotor housing, and a controller. The controller includes a circuit board assembly, a housing with a heat dissipation feature, and a wiring harness. The impeller includes a hub, a fan blade extending from the hub, and a blade. The hub includes an end wall and an annular side wall extending from the periphery of the end wall. The end wall is fixed to the rotor housing of the motor by fastening bolts. The fan blade extends outward from the outer surface of the side wall. The side wall and the outer surface of the motor rotor housing form a receiving space. The blade extends from the inner surface of the side wall and is located in the receiving space.

[0004] In the above-mentioned traditional automotive cooling fans, the airflow through the motor is small and the path is circuitous, resulting in average cooling effect. The high temperature environment of the engine compartment and the heating of the motor itself may cause a series of problems such as increased stator loss of the motor and demagnetization of the ferrite magnet of the rotor housing, further reducing the performance and reliability of the motor itself. Summary of the invention

[0005] The invention provides an automobile cooling fan device with good cooling effect and high reliability, and solves the technical problem that the cooling effect of the automobile cooling fan structure in the prior art is not ideal.

[0006] The present invention also provides an automobile cooling fan device with compact structure, lighter weight, higher integration, high reliability, high efficiency, low cost and good NVH performance; it solves the technical problems of many parts and low reliability in the automobile cooling fan structure in the prior art.

[0007] The above technical problem of the present invention is solved by the following technical solution: an automobile cooling fan device, including a fan frame, an impeller motor is installed at the center of the fan frame, the impeller motor includes a stator, an impeller rotor and a controller, the impeller rotor includes an impeller and a rotor assembly located at the center of the impeller, the rotor assembly includes a rotor shell, and a vent structure is provided on the end face of the rotor shell, and the vent structure forms an air guide space in the axial direction. A three-dimensional vent structure is formed on the end face of the rotor shell, thereby increasing the axial space between the vent structure and the stator, increasing the air intake, and the airflow generated by the rotation of the blades enters the axial space through the vent structure, and is finally discharged from the annular space between the motor and the controller, thereby better cooling the motor and the controller.

[0008] Preferably, the air hole structure comprises an opening on the end surface, and an air guide plate is formed on the outer side of the end surface of the rotor housing, and the air guide plate is located above the opening. The opening is used for air intake, and the air guide plate increases the axial air intake space to improve the cooling effect.

[0009] Preferably, the extension line of the opening passes through the center of the rotor housing. The extension line of the blade opening passes through the axis of the rotor housing, that is, the inlet is perpendicular to the tangential direction of rotation, which is conducive to the airflow entering the rotor housing, the friction loss between the airflow and the rotor housing is minimized, that is, the pressure loss is minimized, and the cooling effect on the motor is the best.

[0010] Preferably, the air deflector includes an air deflector body and air deflector connectors located on both sides, the air deflector body is an arc-shaped body, and the air deflector connectors are spherical bodies. This air deflector with a closed structure at both ends will not cause the airflow entering the air deflector to flow out from the openings on both sides, causing losses, and the air intake efficiency of the air deflector is higher.

[0011] Preferably, the rotor housing is a cylinder with one end open, the rotor housing is a metal part, the impeller uses the rotor housing as the central hub, and the impeller and the rotor housing are injection molded into one piece. The integrated design of the impeller and the rotor housing reduces the number and complexity of parts, optimizes space utilization, and makes the overall structure more compact. The hub dead zone is smaller or the axial size of the motor can be smaller under the same hub diameter, which is especially important for vehicles with limited axial space. Moreover, integration reduces the number of connecting parts, reduces the possibility of problems, and increases service life.

[0012] Preferably, magnets are evenly distributed on the inner wall of the rotor housing. The rotor housing is made of alloy steel and also serves as a rotor housing yoke, providing a magnetic path between two adjacent magnets and playing a magnetic conduction role.

[0013] Preferably, a vent structure is provided on the bottom surface of the rotor housing, and an opening is provided on the annular surface of the rotor housing. The opening on the annular surface facilitates the integral injection molding of the rotor housing and the blades, and the plastic enters through the opening on the annular surface to firmly combine the rotor housing and the blades.

[0014] Preferably, a compensating damper is provided on the fan frame.

[0015] Preferably, the compensation damper structure includes an air port on the fan frame, a hinge shaft is provided at one end of the air port, and a damper is hinged on the hinge shaft. The damper and the hinge shaft form a rotating pair, around which the damper can deflect. Under most working conditions, the compensation damper is in a closed state due to gravity. When the car is traveling at a higher speed, the oncoming airflow generates enough pressure on the compensation damper, thereby pushing the compensation damper to open and increasing the air intake of the cooling fan to assist in heat dissipation. At low speed or stationary state, due to the lack of sufficient oncoming wind pressure, the compensation damper will remain closed or partially closed to avoid unnecessary cooling airflow. This design of using wind pressure to passively adjust the opening and closing of the compensation damper is relatively simple, but can effectively use the running airflow to optimize the cooling effect, especially when driving at high speed.

[0016] Therefore, a kind of automobile cooling fan device of the present invention has the following advantages: 1. Compact structure: The integrated design of the impeller and rotor housing reduces the number and complexity of parts, optimizes space utilization, and makes the overall structure more compact. The hub dead zone is smaller or the motor axial size can be smaller under the same hub diameter, which is especially important for vehicles with limited axial space; 2. Reduce weight: The integrated design eliminates separate connecting parts such as bolts, shafts, etc., thereby reducing the overall weight. This has a positive impact on improving consumption economy and improving vehicle power performance; 3. Improve reliability: Reduce the number of connected parts, reduce the possibility of loosening, damage or failure of these parts, thereby improving the integrity and life of the system; 4. High energy transfer efficiency: Since the impeller and the rotor housing are integrated, the absorption of energy when it is transferred between different components is avoided, thereby improving the working efficiency of the cooling fan; 5. Reduce manufacturing and maintenance costs: Integrated design simplifies the manufacturing process and reduces the number of parts that need to be assembled, thereby reducing production and assembly costs; 6. Reduced vibration and noise: By reducing the number of connecting parts, the connection rigidity of the fan is improved, which can effectively reduce the vibration and noise that may occur during high-speed rotation, and the NVH performance is better; 7. The motor has good cooling effect: the airflow generated by the rotation of the blades stamped on the rotor shell directly cools the motor stator and rotor shell, and the cooling effect is better.

[0017] The cooling fan device of the present invention adopts an impeller motor, which has a compact structure, lighter weight, higher integration, high reliability, high efficiency, low cost, good NVH performance, and good cooling effect of the motor and its controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a perspective view of a vehicle cooling fan device.

[0019] Figure 2 yes Figure 1 A three-dimensional image of the explosion from the other direction.

[0020] Figure 3 It is a three-dimensional view of the impeller rotor housing.

[0021] Figure 4 yes Figure 3 An enlarged perspective view of the rotor housing inside.

[0022] Figure 5 This is a three-dimensional view of the rotor housing of Example 2. DETAILED DESCRIPTION

[0023] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0024] Embodiment 1: like Figure 1 and 2 As shown, an automobile cooling fan device includes a fan frame assembly 1 and an impeller motor 2. The fan frame assembly 1 includes an outer frame 7, a base 6 located at the center of the outer frame 7, ribs 8 connecting the base 6 with the outer frame 7, and a plurality of compensation damper structures 9 installed on the outer frame 7, and the compensation damper structures 9 are located on both sides of the base 6. The compensation damper structure 9 includes a damper port starting from the fan frame, a hinge shaft 10 is provided at one end of the damper port, and a damper blade 11 is hinged on the hinge shaft.

[0025] The impeller motor 2 includes a stator 4 , an impeller rotor assembly 3 , and a controller. The controller includes a circuit board assembly (PCBA), a housing with heat dissipation features, and a wiring harness 5 .

[0026] like Figure 3 and 4As shown, the impeller rotor assembly 3 includes an impeller and a rotor housing 21 located at the center of the impeller. The impeller is made of plastic, and the rotor housing 21 is made of alloy steel. The rotor housing is a cylinder with an opening at one end, and the rotor housing is integrally stamped from a steel plate. The rotor housing includes an end face and an annular face. An axial hole 18 is provided in the center of the rotor housing, and a bearing and a bearing gasket are installed at the axial hole. The wind hole structure is evenly distributed on the end face of the rotor housing 21. The wind hole structure includes an opening 17 provided on the end face. The opening 17 is radially distributed with the rotor housing as the center, that is, the extension line of the opening 17 passes through the center of the rotor housing 21. An air deflector is formed above the opening 17. The air deflector includes a long strip-shaped air deflector body 15 and an air deflector connector 16 located on both sides of the air deflector body. The air deflector body 15 is an arc surface, and the air deflector connector 16 is a spherical surface. The air guide plate increases the axial air inlet space, and the stator 4 is spaced from the end face of the rotor housing to form an axial space. The airflow generated by the rotation of the blades 13 enters the axial space through the opening, and is finally discharged from the annular space between the motor and the controller, thereby better cooling the motor and the controller and improving the cooling effect. A plurality of openings 19 are evenly distributed on the annular surface of the rotor housing, which are used for the plastic to flow in when the rotor housing 21 and the impeller are integrally injection molded to ensure the firmness of the connection between the two. Ferrite magnets 12 are evenly glued on the inner wall of the annular surface of the rotor housing 21 with glue. After the magnets 12 are glued, the rotor housing is placed in a mold to form an impeller rotor housing structure. The impeller includes blades 13 evenly distributed on the outside of the rotor housing and a rim 14 that fixes the other end of the blades.

[0027] Embodiment 2: like Figure 5 As shown, different from Example 1, the wind hole structure on the rotor housing includes an opening 17, and an air guide plate 20 formed by integrally stamping a steel plate above the opening 17. The air guide plate is an upwardly turned long strip-shaped sheet body, which increases the axial air inlet space.

[0028] The specific embodiments described herein are merely examples of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An automobile cooling fan device, comprising a fan frame, with an impeller motor mounted at the center of the fan frame, characterized in that: The impeller motor includes a stator, an impeller rotor and a controller. The impeller rotor includes an impeller and a rotor assembly located at the center of the impeller. The rotor assembly includes a rotor shell. An air hole structure is opened on the end surface of the rotor shell. The air hole structure forms an air guide space in the axial direction.

2. The automotive cooling fan device according to claim 1, characterized in that: The wind hole structure comprises an opening formed on the end surface, and an air guide plate is formed on the outer side of the rotor end surface, and the air guide plate is located above the opening.

3. The automotive cooling fan device according to claim 2, characterized in that: The extension line of the opening passes through the center of the rotor.

4. The automotive cooling fan device according to claim 2, characterized in that: The wind deflector comprises a wind deflector body and wind deflector connectors located on both sides. The wind deflector body is an arc-shaped body, and the wind deflector connectors are spherical bodies.

5. An automobile cooling fan device according to any one of claims 1 to 4, characterized in that: The rotor shell is a cylinder with an opening at one end, the rotor is a metal part, the impeller takes the rotor shell as a central hub, and the impeller and the rotor shell are injection molded into one piece.

6. The automotive cooling fan device according to claim 5, characterized in that: Magnets are evenly distributed on the inner wall of the rotor shell. The rotor shell is made of magnetic conductive material and provides a magnetic circuit for two adjacent magnets.

7. The automotive cooling fan device according to claim 5, characterized in that: A wind hole structure is provided on the bottom surface of the rotor shell, and an opening is provided on the annular surface of the rotor shell.

8. An automobile cooling fan device according to any one of claims 1 to 4, characterized in that: The fan frame is provided with a compensation damper structure, and the compensation damper structure is located on both sides of the impeller.

9. The automotive cooling fan device according to claim 8, characterized in that: The compensation damper structure comprises an air door opening on the fan frame, a hinge shaft is arranged at one end of the air door opening, and an air flap is hingedly connected to the hinge shaft.

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