Air duct structure of high-speed brushless motor
By designing an air duct structure in the brushless motor, including the housing, mounting base, heat guide plate, and air duct heat dissipation holes, the problem of the hot handle of the air blower caused by the inability of the air duct to directly cool the stator is solved, and the motor achieves effective heat dissipation and cooling effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-07
AI Technical Summary
The existing air duct structure of high-speed brushless motors cannot directly cool the stator, resulting in the problem of the air blower handle getting too hot to handle.
Design an air duct structure including a housing, mounting base, heat guide plate and air duct heat dissipation holes. The heat generated by the motor coil is discharged through the air duct heat dissipation holes, and the airflow generated by the fan blades is transmitted to the stator chamber to achieve direct cooling of the stator.
It effectively reduces motor temperature rise and the temperature of the blower handle, improving user comfort.
Smart Images
Figure CN224097506U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of brushless motor heat dissipation technology, specifically to an air duct structure for a high-speed brushless motor. Background Technology
[0002] A high-speed brushless motor with an outer diameter of φ28.8 and a speed of 110,000 RPM is installed inside a blower. After prolonged use, the blower handle becomes hot, primarily due to the motor's temperature rise. During operation, the stator coils heat up, and iron losses in the stator chips also generate heat. The combined effect of these factors causes the motor temperature to rise. Furthermore, the airflow generated by the fan blades is transported outwards through the ductwork without directly cooling the stator, ultimately resulting in a hot-touch handle. Therefore, a novel motor duct structure is urgently needed to address these issues. Utility Model Content
[0003] (a) Technical problems to be solved
[0004] To address the shortcomings of existing technologies, this utility model provides a high-speed brushless motor air duct structure to solve the problem that the air in existing air duct structures does not directly cool the stator, causing the air duct handle to become hot to the touch.
[0005] (II) Technical Solution
[0006] This utility model provides the following technical solution: a duct structure for a high-speed brushless motor, wherein the duct structure includes a housing disposed on the outside of the brushless motor, a mounting base is provided in the middle of the housing, a plurality of heat guiding plates are provided between the inner side of the housing and the outer side of the mounting base, and a plurality of duct heat dissipation holes are provided on the mounting base.
[0007] Preferably, the air duct heat dissipation holes and heat guide plate are arranged along the vertical direction of the mounting base.
[0008] Preferably, the upper end of the mounting base is a bearing chamber for mounting the brushless motor bearing, and the lower end is a stator chamber for mounting the brushless motor stator. The upper and lower ends of the inner wall of the bearing chamber are provided with adhesive grooves. The bearing chamber is stepped, with its upper end protruding outward to form a boss.
[0009] Preferably, the annular array of heat dissipation holes in the air duct is located inside the bearing chamber and communicates with the stator chamber.
[0010] (III) Beneficial Effects
[0011] Compared with the prior art, this utility model provides an air duct structure for a high-speed brushless motor, which has the following beneficial effects:
[0012] 1. The air duct structure of this high-speed brushless motor includes a housing, a mounting base, a heat guide plate, and air duct heat dissipation holes set on the mounting base. The air duct structure is used to dissipate heat from the internal brushless motor, conduct the heat generated by the motor coils away, thereby reducing the motor temperature rise and playing a role in cooling. By setting multiple air duct heat dissipation holes on the mounting base, it is ensured that the airflow generated by the motor fan blades during rotation is transmitted from the air duct heat dissipation holes to the lower stator, thereby achieving the effect of cooling. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of an embodiment of the air duct structure of a high-speed brushless motor according to the present invention.
[0014] Figure 2 This is a schematic diagram of an embodiment of the air duct structure of a high-speed brushless motor according to the present invention.
[0015] Figure 3 This is a front view schematic diagram of an embodiment of the air duct structure of a high-speed brushless motor according to the present invention.
[0016] Figure 4 for Figure 3 A cross-sectional view of BB.
[0017] In the diagram: 1. Outer shell; 2. Mounting base; 3. Heat guide plate; 4. Air duct heat dissipation hole; 5. Bearing chamber; 6. Stator chamber; 7. Glue storage groove; 8. Boss. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes a duct structure for a high-speed brushless motor.
[0020] Please see Figure 1-4 A high-speed brushless motor air duct structure includes a housing 1 located on the outside of the brushless motor, a mounting base 2 located in the middle of the housing 1, a plurality of heat guide plates 3 located between the inner side of the housing 1 and the outer side of the mounting base 2, and a plurality of air duct heat dissipation holes 4 located on the mounting base 2.
[0021] This utility model discloses a high-speed brushless motor air duct structure, including a housing 1, a mounting base 2, a heat guide plate 3, and air duct heat dissipation holes 4 disposed on the mounting base 2. The air duct structure is used to dissipate heat from the internal brushless motor, conduct the heat generated by the motor coils away, thereby reducing the motor temperature rise and playing a role in cooling. Specifically, by setting multiple air duct heat dissipation holes 4 on the mounting base 2, the airflow generated by the motor fan blades during rotation is ensured to be transmitted from the air duct heat dissipation holes 4 to the lower stator, thereby achieving the effect of cooling.
[0022] In a preferred embodiment, refer to Figure 1-4 The air duct structure of the high-speed brushless motor includes air duct cooling holes 4 and heat guide plates 3 arranged vertically along the mounting base 2. The upper end of the mounting base 2 is a bearing chamber 5 for mounting the brushless motor bearings, and the lower end is a stator chamber 6 for mounting the brushless motor stator. The upper and lower ends of the inner wall of the bearing chamber 5 are provided with adhesive grooves 7. The bearing chamber 5 is stepped, with its upper end protruding outward to form a boss 8. The air duct cooling holes 4 are arranged in a ring array inside the bearing chamber 5 and communicate with the stator chamber 6.
[0023] Specifically, the air duct structure is applied to the air duct to cool the motor inside. The heat guide plate 3 directs the air generated by the fan blades inside the air duct inward, but does not directly deliver the air to the stator. The air duct heat dissipation holes 4 can directly deliver the air to the lower stator, thereby achieving the cooling effect. The bearing chamber 5 and the stator chamber 6 are respectively located at the upper and lower parts of the mounting base 2. The bearing chamber 5 houses the motor bearings, and the stator chamber houses the motor stator. The air duct heat dissipation holes 4 are connected to the stator chamber 6 to facilitate the delivery of air to the stator chamber 6. The upper end of the bearing chamber 5 is equipped with fan blades that are connected to the output shaft of the motor. When the air duct is started, the fan blades will rotate, thereby generating air. The air is delivered to the stator chamber 6 through the air duct heat dissipation holes 4 and then to the interior of the air duct through the guide plate 3.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A duct structure for a high-speed brushless motor, characterized in that, The air duct structure includes a housing located outside the brushless motor, a mounting base located in the middle of the housing, multiple heat guide plates located between the inner side of the housing and the outer side of the mounting base, and multiple air duct heat dissipation holes located on the mounting base.
2. The air duct structure of the high-speed brushless motor according to claim 1, characterized in that, The air duct heat dissipation holes and heat guide plate are arranged along the vertical direction of the mounting base.
3. The air duct structure of the high-speed brushless motor according to claim 1, characterized in that, The upper end of the mounting base is a bearing chamber for installing the brushless motor bearing, and the lower end is a stator chamber for installing the brushless motor stator. The upper and lower ends of the inner wall of the bearing chamber are provided with glue-containing grooves. The bearing chamber is stepped, with its upper end protruding outward to form a boss.
4. The air duct structure of the high-speed brushless motor according to claim 1, characterized in that, The annular array of heat dissipation holes in the air duct is located inside the bearing chamber and is connected to the stator chamber.