A high pressure electronic fan of air cooling type

Abstract

The application discloses a forced air cooling type high-voltage electronic fan, and relates to an engine cooling system, which comprises a motor and a fan blade; the fan blade comprises an outer wind ring, an inner sleeve and connecting blades; the inner sleeve is sleeved on the motor shell and leaves a ventilation gap; at least two air inlet holes are arranged on the bottom wall of the inner sleeve; air inlet fan blades which are curved along the rotation direction of the motor and air outlet fan blades which are curved against the rotation direction of the motor are arranged on the two sides of the air inlet holes; the air outlet fan blades leave a fan blade gap with the motor shell; and the motor shell is provided with heat dissipation convex ribs and heat dissipation grooves. The application does not need extra energy consumption, and cold air is sucked in by the air inlet fan blades through the rotation of the fan blade, and the air flow is guided to the heat dissipation grooves by the air outlet fan blades, so that an active heat dissipation channel is formed, the heat exchange efficiency of the motor is improved by more than 30%, the insulation is prevented from being reduced due to heat accumulation, the winding is prevented from being aged, and the service life of the bearing is prevented from being reduced; in addition, the structure is compact, the cooling system can meet the requirements of miniaturization and low energy consumption, and the stable operation of the fan is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to an engine cooling system, in particular to a wind-cooled high-voltage electronic fan. BACKGROUND

[0002] In many fields such as industrial production, transportation, and new energy equipment, the stable operation of high-power cooling systems is crucial to ensure the overall equipment performance. Among them, the wind-cooled high-voltage electronic fan in the range of 3KW-10KW is widely used as a core cooling component in engine cooling, heat dissipation of large mechanical equipment, and thermal management of new energy vehicles. Such fans need to continuously output high power under high pressure conditions to meet the high-load heat dissipation requirements. However, the motor, as the core power source of the fan, generates a large amount of heat due to electromagnetic loss and mechanical loss during operation. If the heat cannot be effectively dissipated, the internal temperature of the motor will rise rapidly.

[0003] In the prior art, two main methods are usually used to solve the motor cooling problem: one is to set up cooling ribs on the surface of the motor shell to increase the contact area between the shell and the outside air and strengthen the passive heat exchange efficiency; the other is to use materials with better heat conductivity such as aluminum alloy and copper alloy to make the motor shell to speed up the conduction of heat from the motor interior to the shell. These technical means can achieve motor cooling to some extent and ensure short-term stable operation of the fan under low-power and low-temperature conditions.

[0004] However, as the cooling demand of application scenarios continues to increase, fans gradually develop towards high power and high load, especially in high-temperature environments such as engine compartments and large industrial equipment rooms. The limitations of existing cooling technologies are increasingly evident. Specifically, relying solely on passive cooling structures of the motor shell has the following key problems: on the one hand, when the motor is in the 3KW-10KW power range, the internal heat generated per unit time is much higher than that in low-power conditions. The heat conducted to the shell through cooling ribs and high-thermal-conductivity materials cannot be quickly exchanged with the outside air, and the heat is easily accumulated in the motor interior. On the other hand, in high-temperature environments, the temperature difference between the outside air and the motor shell decreases, and the passive heat exchange efficiency further decreases, leading to a continuous rise in the temperature of the motor shell, which affects the insulation performance of the motor winding and the lubrication effect of the bearing, and even causes the motor to overheat and burn out, which not only restricts the improvement of the overall cooling performance of the fan, but also significantly shortens the service life of the fan, and cannot meet the demand for efficient and stable cooling of high-power high-voltage motors.

[0005] Therefore, in view of the heat dissipation problem of the motor of the high-power air-cooled high-voltage electronic fan, a technical solution capable of breaking through the passive heat dissipation limitation and actively enhancing the heat exchange efficiency of the motor shell is urgently needed to solve the problem of insufficient heat dissipation of the motor under high load and high temperature conditions and to ensure long-term reliable operation of the fan, which has become an important issue to be solved by the technical personnel in the field. SUMMARY

[0006] In view of the deficiencies in the background art, the present application provides an air-cooled high-voltage electronic fan.

[0007] The technical solution adopted by the present application is: an air-cooled high-voltage electronic fan, comprising a motor and a fan blade connected to the output end of the motor, the fan blade comprising an outer wind ring, an inner sleeve and a blade for connecting the outer wind ring and the inner sleeve, the inner sleeve being sleeved on the shell of the motor near one end of the fan blade, and a ventilation gap being left between the inner sleeve and the shell;

[0008] At least two spaced apart air inlet holes are provided on the bottom wall of the inner sleeve, an air inlet fan blade curved in the direction of rotation of the motor is provided on the side of the air inlet hole away from the shell, and an air outlet fan blade is provided on the side of the air inlet hole close to the shell, the bending direction of the air outlet fan blade being opposite to the direction of rotation of the motor, and a fan blade gap being left between the air outlet fan blade and the shell;

[0009] Heat dissipation ribs are provided on the outer wall of the shell of the motor, and heat dissipation grooves are formed between adjacent heat dissipation ribs.

[0010] Further, the bending direction of the air inlet fan blade is consistent with the direction of rotation of the motor, for accelerating the airflow suction;

[0011] The bending direction of the air outlet fan blade is opposite to the direction of rotation of the motor, for forming a vortex to enhance the heat dissipation efficiency.

[0012] Further, the air inlet hole is of an outer wide and inner narrow structure.

[0013] Further, the air inlet hole is of an isosceles triangle structure with the outer wide and inner narrow structure, the air inlet fan blade being arranged along the side of the air inlet hole, and the curvature radius of the curved section of the air inlet fan blade extending from the narrow end to the wide end gradually decreasing from the narrow end to the wide end.

[0014] Further, a connecting hole is provided on the inner sleeve, the air outlet fan blade comprising a horizontal curved surface extending from one side of the connecting hole to the side wall of the inner sleeve and a vertical curved surface connected with the side wall of the inner sleeve, the height of the vertical curved surface being greater than 2 / 3 of the height of the side wall of the inner sleeve.

[0015] Further, the blade is of an arc structure, the curvature of which is matched with the bending directions of the air inlet fan blade and the air outlet fan blade and the direction of rotation of the motor.

[0016] Further, the motor has a rated power range of 3kw to 10KW, and is suitable for high-pressure working environment.

[0017] The application has the following advantages:

[0018] 1. The motor self-heat dissipation efficiency is improved: compared with the prior art which only relies on the passive heat dissipation of the motor shell, the application sets an air inlet hole in the bottom wall of the inner sleeve of the fan blade, and correspondingly configures an air inlet fan blade and an air outlet fan blade, forming an active heat dissipation structure for the motor shell. When the fan is running, the air inlet fan blade rotates synchronously with the fan blade, and can quickly suck low-temperature air from the outside through the air inlet hole into the ventilation gap between the inner sleeve and the motor shell; at the same time, the air outlet fan blade opposite to the rotating direction of the motor generates airflow, which pushes the airflow to flow along the heat dissipation groove on the surface of the motor shell. This active air guide structure can directly act on the heat dissipation area of the motor shell, accelerate the discharge of high-temperature air in the heat dissipation groove, realize the "air suction-air guide-heat dissipation" heat dissipation system, and compared with the passive heat dissipation mode, the heat exchange efficiency of the motor shell can be improved by more than 30%, the large amount of heat generated during the operation of the motor can be quickly taken away, and the accumulation of heat in the motor is avoided.

[0019] 2. The heat dissipation structure of the application is completely integrated on the fan blade and the motor shell, without the need for additional power components such as fans and water pumps, which not only avoids the problems of space occupation and energy consumption of additional power sources, but also ensures the compactness of the overall structure of the fan, which can be adapted to the limited installation space of existing engine compartments, equipment machine rooms and the like, and has strong compatibility. At the same time, the air inlet fan blade, the air outlet fan blade and the fan blade rotate synchronously, without the need for an additional control module, which simplifies the overall control logic of the fan, reduces the structural complexity and manufacturing cost, and is convenient for mass production and practical application promotion.

[0020] In addition to the purposes, features and advantages described above, the application has other purposes, features and advantages.

[0021] The application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The application is a structural schematic diagram.

[0023] Figure 2 The application is a structural schematic diagram of the fan blade.

[0024] Figure 3 The application is a cross-sectional schematic diagram of the use information.

[0025] Figure 4 The application is a structural schematic diagram of the fan blade from another perspective.

[0026] Figure 5 The application is a structural schematic diagram of the motor.

[0027] Figures 1-5 In 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

[0028] 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.

[0029] 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.

[0030] This invention provides an air-cooled high-voltage electronic fan.

[0031] In this embodiment, refer to Figures 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.

[0032] 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.

[0033] 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.

[0034] 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".

[0035] 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.

[0036] 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.

[0037] 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;

[0038] 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.

[0039] 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.

[0040] Specifically, the air intake has a structure that is wider on the outside and narrower on the inside.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 ensures uniform heat dissipation throughout the motor.

[0046] 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.

[0047] 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.

[0048] Specifically, the rated power of the motor ranges from 3kW to 10kW and is suitable for high-voltage working environments.

[0049] 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.

[0050] 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. On the side of the air inlet away from the outer shell, there is an air intake fan blade that is bent in the direction of motor rotation. This fan blade is used to generate negative pressure suction during rotation and draw low-temperature air from the outside into the ventilation gap through the air inlet. The air inlet is provided with an exhaust fan blade on the side near the outer casing. The bending direction of the exhaust fan blade is opposite to the rotation direction of the motor, and there is a gap between the fan blade and the outer casing. When rotating, it generates a thrust on the air in the ventilation gap, forcing the airflow to flow along the motor casing. 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.

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