Air-cooled high-voltage electronic fan

Abstract

The invention discloses an air-cooled high-voltage electronic fan, which relates to an engine cooling system and comprises a motor and fan blades. The fan blade comprises an outer wind ring, an inner sleeve and a connecting blade, the inner sleeve is sleeved on the motor shell and is provided with a ventilation gap, the bottom wall of the inner sleeve is provided with at least two air inlet holes, two sides of the air inlet holes are respectively provided with an air inlet fan blade bent along the rotation direction of the motor and an air outlet fan blade bent against the rotation direction of the motor, and a fan blade gap is reserved between the air outlet fan blade and the shell; the motor shell is provided with heat dissipation convex ribs and heat dissipation grooves. Extra energy consumption is not needed, the fan blades rotate to enable the air inlet fan blades to suck cold air, the air outlet fan blades guide airflow to the heat dissipation grooves, an active heat dissipation channel is formed, the heat exchange efficiency of the motor is improved by 30% or above, insulation reduction, winding aging and bearing service life shortening caused by heat accumulation are avoided, the structure is compact, the requirements for miniaturization and low energy consumption of a cooling system are met, and the service life of the motor is prolonged. And stable operation of the fan is ensured.

Description

Technical Field

[0001] This invention relates to engine cooling systems, and more specifically to an air-cooled high-pressure electric fan. Background Technology

[0002] In numerous fields such as industrial production, transportation, and new energy equipment, the stable operation of high-power cooling systems is crucial for ensuring overall equipment performance. Among these systems, air-cooled high-voltage electric fans in the 3KW-10KW range are widely used as core cooling components in critical scenarios such as engine cooling, heat dissipation of large mechanical equipment, and thermal management of new energy vehicles. These fans need to continuously output high power under high-pressure conditions to meet high-load heat dissipation requirements. As the core power source of the fan, the motor generates a large amount of heat during operation due to electromagnetic losses and mechanical losses. If this heat cannot be effectively dissipated in a timely manner, the internal temperature of the motor will rise sharply.

[0003] In existing technologies, two main methods are typically used to solve the problem of motor heat dissipation: First, heat dissipation ribs are installed on the surface of the motor casing to increase the contact area between the casing and the outside air, thereby enhancing the efficiency of passive heat exchange; second, materials with superior thermal conductivity, such as aluminum alloys and copper alloys, are used to make the motor casing, accelerating the transfer of heat from the motor's interior to the casing. These techniques can achieve motor heat dissipation to a certain extent under low-to-medium power and low ambient temperature conditions, ensuring stable short-term fan operation.

[0004] However, as application scenarios increasingly demand higher cooling performance, fans are gradually evolving towards higher power and higher loads. Especially in high-temperature environments such as engine compartments and large industrial equipment rooms, the limitations of existing heat dissipation technologies are becoming increasingly apparent. Specifically, relying solely on the passive cooling structure of the motor casing presents the following key problems: Firstly, when the motor operates in the 3KW-10KW power range, the heat generated internally per unit time far exceeds that under low-to-medium power conditions. Heat transferred to the casing solely through heat dissipation fins and high thermal conductivity materials cannot quickly exchange heat with the outside air, leading to heat accumulation inside the motor. Secondly, in high-temperature environments, the temperature difference between the outside air and the motor casing decreases, further reducing the efficiency of passive heat exchange. This causes the motor casing temperature to rise continuously, affecting the insulation performance of the motor windings and the lubrication of the bearings. In severe cases, it can even cause the motor to overheat and burn out. This not only restricts the improvement of the overall cooling performance of the fan but also significantly shortens its lifespan, failing to meet the high-efficiency and stable heat dissipation requirements of high-power, high-voltage motors.

[0005] Therefore, in response to the heat dissipation problem of high-power air-cooled high-voltage electric fans, there is an urgent need to develop a technical solution that can overcome the limitations of passive heat dissipation and actively enhance the heat exchange efficiency of the motor casing. This is to solve the problem of insufficient heat dissipation of the motor under high load and high temperature conditions and ensure the long-term reliable operation of the fan. This has become an important issue that needs to be addressed by those skilled in the art. Summary of the Invention

[0006] To address the shortcomings of the prior art, the present invention provides an air-cooled high-voltage electronic fan.

[0007] The technical solution adopted in this invention is: a wind-cooled high-voltage electronic fan, including a motor and fan blades connected to the output end of the motor. The fan blades include an outer fan ring, an inner sleeve, and blades for connecting the outer fan ring and the inner sleeve. The inner sleeve is fitted onto the outer casing of the motor near one end of the fan blades, and a ventilation gap is left between the inner sleeve and the outer casing. At least two spaced air inlets are provided on the bottom wall of the inner sleeve. An air intake fan blade is provided on the side of the air inlet away from the outer shell, which is bent in the direction of motor rotation. An air outlet fan blade is provided on the side of the air inlet close to the outer shell. The bending direction of the air outlet fan blade is opposite to the direction of motor rotation, and a fan blade gap is left between the air outlet fan blade and the outer shell. The outer wall of the motor housing is provided with heat dissipation ribs at intervals, and heat dissipation grooves are formed between adjacent heat dissipation ribs.

[0008] Furthermore, the bending direction of the intake fan blades is consistent with the rotation direction of the motor, which is used to accelerate the intake of airflow; The bending direction of the fan blades is opposite to the rotation direction of the motor, which is used to create eddies to enhance heat dissipation efficiency.

[0009] Furthermore, the air intake has a structure that is wider on the outside and narrower on the inside.

[0010] Furthermore, the air intake is an isosceles triangle structure that is wider on the outside and narrower on the inside. The air intake fan blades are arranged along the side of the air intake, and the radius of curvature of the curved section of the air intake fan blades extending from the narrow end to the wide end gradually decreases from the narrow end to the wide end.

[0011] Furthermore, the inner sleeve is provided with a connecting hole, and the fan blade includes a transverse curved surface extending from one side of the connecting hole to the side wall of the inner sleeve and a vertical curved surface adapted to and connected to the side wall of the inner sleeve. The height of the vertical curved surface is greater than 2 / 3 of the height of the side wall of the inner sleeve.

[0012] Furthermore, the blades have an arc-shaped structure, and their curvature is coordinated with the bending direction of the inlet fan blades and outlet fan blades to match the motor rotation direction.

[0013] Furthermore, the rated power of the motor ranges from 3kW to 10kW, making it suitable for high-voltage working environments.

[0014] The beneficial effects of this invention are: 1. Improved Motor Self-Heating Efficiency: Compared to existing technologies that rely solely on passive heat dissipation from the motor casing, this application incorporates an air inlet on the bottom wall of the inner sleeve of the fan blades, along with corresponding inlet and outlet fan blades, forming an active heat dissipation structure for the motor casing. When the fan operates, the inlet fan blades rotate synchronously with the fan blades, quickly drawing in cool outside air through the inlet into the ventilation gap between the inner sleeve and the motor casing. Simultaneously, the outlet fan blades, rotating in the opposite direction to the motor, generate airflow, propelling it along the heat dissipation grooves on the surface of the motor casing. This active airflow structure directly acts on the heat dissipation area of ​​the motor casing, accelerating the exhaust of hot air from the heat dissipation grooves, achieving a "intake-airflow-heat exhaust" cooling system. Compared to passive heat dissipation, this increases the heat exchange efficiency of the motor casing by over 30%, quickly removing the large amount of heat generated during motor operation and preventing heat accumulation inside the motor.

[0015] 2. The heat dissipation structure of this patent is fully integrated into the fan blades and motor housing, eliminating the need for additional power components such as fans and water pumps. This avoids the problems of additional power sources occupying space and increasing energy consumption, while ensuring the compactness of the overall fan structure. It can be adapted to existing engine compartments, equipment rooms, and other limited installation spaces, demonstrating strong compatibility. Furthermore, the inlet and outlet fan blades rotate synchronously with the fan blades, eliminating the need for additional control modules. This simplifies the overall control logic of the fan, reduces structural complexity and manufacturing costs, and facilitates large-scale mass production and practical application.

[0016] In addition to the objectives, features and advantages described above, the present invention has other objectives, features and advantages.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the fan blade structure.

[0020] Figure 3 This is a cross-sectional schematic diagram of the information used in this application.

[0021] Figure 4 This is a schematic diagram of the fan blade from another perspective.

[0022] Figure 5 This is a schematic diagram of the motor structure.

[0023] Figure 1-5In the middle: 1. Motor; 2. Fan blades; 3. Outer fan ring; 4. Inner sleeve; 5. Blades; 6. Ventilation gap; 7. Air inlet; 8. Inlet fan blades; 9. Outlet fan blades; 10. Fan blade gap; 11. Heat dissipation groove; 12. Connection hole; 13. Horizontal curved surface; 14. Vertical curved surface; 15. Heat dissipation ribs. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0026] This invention provides an air-cooled high-voltage electronic fan.

[0027] In this embodiment, refer to Figure 1-5 The air-cooled high-pressure electronic fan includes a motor 1 and a fan blade 2 connected to the output end of the motor 1. The fan blade 2 includes an outer fan ring 3, an inner sleeve 4, and blades 5 for connecting the outer fan ring and the inner sleeve. The inner sleeve is fitted onto the outer casing of the motor near one end of the fan blade, and a ventilation gap 6 is left between the inner sleeve and the outer casing. At least two spaced air inlets 7 are provided on the bottom wall of the inner sleeve. An air inlet fan blade 8 is provided on the side of the air inlet 7 away from the outer shell, which is bent in the direction of motor rotation. An air outlet fan blade 9 is provided on the side of the air inlet 7 close to the outer shell. The bending direction of the air outlet fan blade is opposite to the direction of motor rotation, and a fan blade gap 10 is left between the air outlet fan blade and the outer shell. The outer wall of the motor housing is provided with heat dissipation ribs 15 at intervals, and heat dissipation grooves 11 are formed between adjacent heat dissipation ribs.

[0028] The above technical solution forms an active heat dissipation system. First, the fan blades adopt an integrated design of outer fan ring, inner sleeve, and blades. The inner sleeve is fitted into the motor housing and has a reserved ventilation gap, providing a basic channel for airflow. Second, the air inlet on the bottom wall of the inner sleeve, together with the directional curved inlet and outlet fan blades, uses the rotational power of the motor to drive the fan blades to rotate synchronously: the inlet fan blades bend in the direction of motor rotation, generating negative pressure suction when rotating, drawing low-temperature outside air into the ventilation gap from the inlet; the outlet fan blades bend in the opposite direction, generating thrust on the air in the ventilation gap when rotating, forcing the airflow to flow along the motor housing. Finally, the heat dissipation ribs on the motor housing form heat dissipation grooves, increasing the contact area with the airflow, allowing the forced airflow to fully carry away the heat in the heat dissipation grooves, completing the heat dissipation cycle of "intake → flow guidance → heat exchange".

[0029] The above solution overcomes the limitations of passive heat dissipation by constructing an active heat dissipation channel. Compared to existing technologies that rely solely on the casing for heat dissipation, it can improve motor heat dissipation efficiency by more than 30%, preventing heat accumulation during operation in the 3KW-10KW power range. The integrated design of the fan blades and motor casing eliminates the need for an additional power source, improving heat dissipation performance without increasing equipment size or energy consumption, and is suitable for various installation scenarios. It should be noted that this application limits the term to "motor rotation direction". Figure 1 The direction of rotation indicated by the arrow in the view.

[0030] Specifically, the bending direction of the intake fan blades is consistent with the rotation direction of the motor, which is used to accelerate the intake of airflow; The bending direction of the fan blades is opposite to the rotation direction of the motor, which is used to create eddies to enhance heat dissipation efficiency.

[0031] In this embodiment, the intake fan blades rotate in the same direction as the motor to accelerate air intake, while the exhaust fan blades bend in the opposite direction to create an airflow vortex, accelerating airflow (by setting the intake and exhaust fan blades, a wind speed greater than 2-4 meters per second can be formed on the surface of the motor housing), enhancing the heat exchange between the airflow and the motor, and further improving heat dissipation efficiency.

[0032] Specifically, the air intake has a structure that is wider on the outside and narrower on the inside.

[0033] In this embodiment, the air inlet is wider on the outside and narrower on the inside, which utilizes the principles of fluid dynamics to increase the air intake area while accelerating the airflow speed.

[0034] Specifically, the air intake is an isosceles triangle structure that is wider on the outside and narrower on the inside. The air intake fan blades are arranged along the side of the air intake, and the radius of curvature of the curved section of the air intake fan blades extending from the narrow end to the wide end gradually decreases from the narrow end to the wide end.

[0035] In this embodiment, the air intake hole is an isosceles triangle with a wider outer edge and a narrower inner edge. The air intake fan blades are arranged along the side with a gradually changing radius of curvature to adapt to the airflow trajectory, guide the airflow to enter efficiently, improve the air intake efficiency, and at the same time ensure the structural stability of the air intake fan blades and extend their service life.

[0036] Specifically, the inner sleeve is provided with a connection hole 12, and the fan blade includes a transverse curved surface 13 extending from one side of the connection hole to the side wall of the inner sleeve and a vertical curved surface 14 adapted to and connected to the side wall of the inner sleeve. The height of the vertical curved surface is greater than 2 / 3 of the height of the side wall of the inner sleeve.

[0037] In this embodiment, the horizontal curved surface of the exhaust fan blades extends to the inner sleeve sidewall, and the vertical curved surface exceeds 2 / 3 of the height of the inner sleeve sidewall, expanding the airflow guidance range and enhancing airflow thrust. This ensures stable airflow guidance into the motor, prevents airflow leakage, improves the sealing and heat dissipation efficiency of the heat dissipation channel, and guarantees uniform heat dissipation throughout the motor.

[0038] Specifically, the blades have an arc-shaped structure, and their curvature is coordinated with the bending direction of the inlet fan blades and outlet fan blades to match the motor rotation direction.

[0039] In this embodiment, the curvature of the arc blades is coordinated with the bending direction of the inlet and outlet fan blades to match the rotation direction of the motor, making the overall airflow of the fan blades smoother.

[0040] Specifically, the rated power of the motor ranges from 3kW to 10kW and is suitable for high-voltage working environments.

[0041] In this embodiment, the motor has a rated power range of 3KW to 10KW and is designed to be compatible with high voltage environments (200V to 1000V) to meet the requirements for stable operation under high power and high voltage conditions.

[0042] Please note to all technical personnel: Although the present invention has been described according to the specific embodiments above, the ideas of the present invention are not limited to this invention. Any modifications that utilize the ideas of the present invention will be included within the scope of protection of this patent.

Claims

1. A wind-cooled high-voltage electronic fan, comprising a motor and fan blades connected to the output end of the motor, characterized in that: The fan blade includes an outer fan ring, an inner sleeve, and blades for connecting the outer fan ring and the inner sleeve. The inner sleeve is fitted onto the housing of the motor near one end of the fan blade, and a ventilation gap is left between the inner sleeve and the housing. At least two spaced air inlets are provided on the bottom wall of the inner sleeve. An air intake fan blade is provided on the side of the air inlet away from the outer shell, which is bent in the direction of motor rotation. An air outlet fan blade is provided on the side of the air inlet close to the outer shell. The bending direction of the air outlet fan blade is opposite to the direction of motor rotation, and a fan blade gap is left between the air outlet fan blade and the outer shell. The outer wall of the motor housing is provided with heat dissipation ribs at intervals, and heat dissipation grooves are formed between adjacent heat dissipation ribs.

2. The air-cooled high-voltage electronic fan according to claim 1, characterized in that: The bending direction of the intake fan blades is consistent with the rotation direction of the motor, which is used to accelerate the intake of airflow; The bending direction of the fan blades is opposite to the rotation direction of the motor, which is used to create eddies to enhance heat dissipation efficiency.

3. The air-cooled high-voltage electronic fan according to claim 1, characterized in that: The air intake has a structure that is wider on the outside and narrower on the inside.

4. The air-cooled high-voltage electronic fan according to claim 1, characterized in that: The air intake is an isosceles triangle structure that is wider on the outside and narrower on the inside. The air intake fan blades are arranged along the side of the air intake, and the radius of curvature of the curved section of the air intake fan blades extending from the narrow end to the wide end gradually decreases from the narrow end to the wide end.

5. The air-cooled high-voltage electronic fan according to claim 1, characterized in that: The inner sleeve is provided with a connection hole, and the fan blade includes a transverse curved surface extending from one side of the connection hole to the side wall of the inner sleeve and a vertical curved surface adapted to and connected to the side wall of the inner sleeve. The height of the vertical curved surface is greater than 2 / 3 of the height of the side wall of the inner sleeve.

6. The air-cooled high-voltage electronic fan according to claim 1, characterized in that: The blades have an arc-shaped structure, and their curvature is coordinated with the bending direction of the inlet and outlet fan blades to match the motor rotation direction.

7. The air-cooled high-voltage electronic fan according to claim 1, characterized in that: The rated power of the motor ranges from 3kW to 10kW and is suitable for high-voltage working environments.

Images