A novel motor controller cooling device

Abstract

This invention provides a novel cooling device for a motor controller, comprising a housing, a first heat dissipation section, a second heat dissipation section, and a cooling fan. The housing contains an isolated upper cavity, a lower cavity, and a central ventilation channel. The housing wall has an air inlet and an air outlet connecting to the ventilation channel. The first heat dissipation section includes a first mounting plate fixed to the upper cavity and first heat dissipation fins extending into the ventilation channel. The second heat dissipation section includes a second mounting plate fixed to the lower cavity and second heat dissipation fins extending into the ventilation channel. The cooling fan is mounted on the outside of the housing and connected to either the air inlet or the air outlet. The first and second heat dissipation fins are arranged alternately within the ventilation channel, extending in the same direction as the ventilation channel. This design reduces space occupation through partitioned installation of heat dissipation components and significantly improves heat dissipation efficiency through forced ventilation and the staggered fin design, making it particularly suitable for cooling motor controllers in confined, enclosed environments.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation device technology, and more specifically, to a novel motor controller cooling device. Background Technology

[0002] In the operating environment of small aircraft, the cabin is characterized by its high degree of airtightness and extremely limited space. This environmental characteristic poses extremely stringent challenges to the heat dissipation of electronic equipment within the cabin. Among these challenges, the heat generation of key components is particularly prominent in the motor controller, a core control component of the aircraft's power system.

[0003] Specifically, the three-phase rectifier bridge in the motor controller generates a lot of heat due to power loss during the conversion of AC to DC power; the polarization of the electrolyte in the rectifier capacitor during the charge and discharge cycle also leads to significant heat accumulation; and the power devices inside the voltage regulator circuit board are in a high-load working state for a long time in order to maintain the stability of the output voltage, which is also one of the main heat sources.

[0004] Currently, the industry lacks an effective heat dissipation solution for these high-heat-generating components. Traditional natural heat dissipation relies on heat exchange between the component and the surrounding air. However, in the confined environment of an aircraft cabin, air circulation is extremely poor, making it difficult for heat to dissipate quickly, resulting in very low heat dissipation efficiency. This not only causes the motor controller to operate at high temperatures for extended periods, leading to decreased operational stability and slower response speed, but also accelerates component aging and wear, severely impacting the overall performance and operational safety of the aircraft. It has become a key bottleneck restricting the improvement of the endurance and reliability of small aircraft. Utility Model Content

[0005] This application aims to solve the problem of low heat dissipation efficiency of motor controllers in confined and narrow spaces. To overcome the shortcomings of the prior art, this application provides a novel motor controller cooling device.

[0006] This application provides a novel motor controller cooling device, comprising:

[0007] The box body has an upper cavity, a lower cavity, and a venting channel between them. The venting channel is isolated from both the upper cavity and the lower cavity. The box body wall has an air inlet and an air outlet that are respectively connected to the two ends of the venting channel.

[0008] The first heat dissipation part includes a first mounting plate and a plurality of first heat dissipation fins integrally formed on the first mounting plate. The first mounting plate is fixed in the upper cavity and used to fix the heat dissipation components. The first heat dissipation fins extend into the ventilation channel.

[0009] The second heat dissipation section includes a second mounting plate and a plurality of second heat dissipation fins integrally formed on the second mounting plate. The second mounting plate is fixed in the lower cavity and is used to fix the heat dissipation components. The second heat dissipation fins extend into the ventilation channel.

[0010] A cooling fan is fixedly installed on the outside of the housing, and its air outlet is connected to the air inlet or air outlet.

[0011] The first and second heat dissipation fins are arranged at intervals within the air duct.

[0012] Compared with the prior art, the novel motor controller cooling device proposed in this application has the following advantages: by installing heat dissipation components separately in the upper and lower cavities, the components are arranged in a partitioned layout, reducing space occupation; the heat dissipation fins extend into independent air passages, combined with forced ventilation by cooling fans, which greatly improves heat dissipation efficiency and solves the problem of insufficient natural heat dissipation in a confined and narrow environment; the spaced arrangement of the fins ensures smooth airflow, avoids airflow blockage, and ensures uniform heat dissipation.

[0013] In one possible implementation, the first and second heat dissipation fins extend in the same direction as the air duct. Compared with the prior art, this reduces airflow resistance as it passes through the fins, increases ventilation volume and flow rate, and enhances heat dissipation efficiency; it also avoids turbulence losses caused by the fins being perpendicular to the airflow, resulting in more stable heat dissipation.

[0014] In one possible implementation, the first and second heat dissipation fins are staggered. Compared with the prior art, this increases the contact area between the fins and the airflow within the limited ventilation space, thereby improving heat exchange efficiency; the staggered structure can disrupt the laminar flow state of the airflow, enhance airflow disturbance, and further improve the heat dissipation effect.

[0015] In one possible implementation, the second mounting plate is integrally formed inside the housing, and the first mounting plate is fixedly connected above the second mounting plate, together forming the ventilation channel. Compared with the prior art, the second mounting plate is integrally formed with the housing, which improves structural strength and stability and reduces the impact of vibration on heat dissipation components; the upper and lower mounting plates together form the ventilation channel, simplifying the overall structural design, reducing assembly complexity, and saving space.

[0016] In one possible implementation, both the first and second mounting plates are provided with through slots for connecting the upper and lower cavities. Compared with the prior art, the through slots enable internal communication between the upper and lower cavities, facilitating wiring connections or signal transmission between components, avoiding wiring difficulties caused by cavity isolation, and without affecting the independent heat dissipation function of the ventilation duct.

[0017] In one possible implementation, the top of the housing is provided with a top cover, which is detachably connected to the housing by bolts. Compared with the prior art, the top cover is detachable, which facilitates the installation, inspection, and maintenance of components inside the upper cavity, improving the operability of the device and the convenience of subsequent maintenance.

[0018] In one possible implementation, the bottom of the housing is provided with a base plate, which is detachably connected to the housing by bolts. Compared with the prior art, the base plate is detachable, which facilitates the installation, inspection and maintenance of components in the lower cavity. It also works with the top cover to achieve convenient bidirectional maintenance of the upper and lower cavities, improving overall practicality.

[0019] In one possible implementation, multiple third heat dissipation fins are integrally formed on the end face of the housing that fits against the cooling fan. Compared with the prior art, the third heat dissipation fins increase the heat dissipation area of ​​the contact area between the housing and the cooling fan, helping to dissipate the heat of the housing itself, and forming a synergistic heat dissipation with the heat dissipation structure in the ventilation channel, further improving the overall cooling effect.

[0020] In one possible implementation, the cooling fan is either a blower fan or an exhaust fan. Compared with the prior art, the fan type can be flexibly selected according to the actual installation space and airflow direction requirements, enhancing the adaptability of the device and meeting the heat dissipation layout requirements in different scenarios.

[0021] In one possible implementation, the housing, the first mounting plate, and the second mounting plate are all made of aluminum alloy. Compared with the prior art, aluminum alloy has excellent thermal conductivity, which can quickly conduct the heat generated by the components to the heat sink fins, improving heat transfer efficiency; at the same time, aluminum alloy is lightweight and high-strength, meeting the requirements of small aircraft and other devices for lightweight and high-strength equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this application;

[0023] Figure 2 A cross-section of this application Figure 1 ;

[0024] Figure 3 A cross-section of this application Figure 2 ;

[0025] Figure 4 Schematic diagram of the box structure Figure 1 ;

[0026] Figure 5 Schematic diagram of the box structure Figure 2 ;

[0027] Figure 6 This is a schematic diagram of the structure of the first mounting plate;

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Box body; 11. Upper cavity; 12. Lower cavity; 13. Ventilation channel; 2. First heat dissipation unit; 21. First mounting plate; 22. First heat dissipation fin; 3. Second heat dissipation unit; 31. Second mounting plate; 32. Second heat dissipation fin; 4. Cooling fan; 5. Through slot; 6. Top cover; 7. Bottom plate; 8. Third heat dissipation fin. Detailed Implementation

[0030] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0031] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0032] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] See Figures 1 to 6This application discloses a novel motor controller cooling device, comprising: a housing 1, a first heat dissipation section 2, a second heat dissipation section 3, and a cooling fan 4. The housing 1 has an upper cavity 11, a lower cavity 12, and a ventilation channel 13 located between them, the ventilation channel 13 being isolated from both the upper cavity 11 and the lower cavity 12; the housing wall of the housing 1 has an air inlet and an air outlet respectively connected to both ends of the ventilation channel 13; the first heat dissipation section 2 includes a first mounting plate 21 and multiple first heat dissipation fins 22 integrally formed on the first mounting plate 21, the first mounting plate 21 being fixed inside the upper cavity 11 and used to fix heat dissipation components, the first heat dissipation fins 22 extending into the ventilation channel 13; the second... The heat dissipation section 3 includes a second mounting plate 31 and a plurality of second heat dissipation fins 32 integrally formed on the second mounting plate 31. The second mounting plate 31 is fixed in the lower cavity 12 and is used to fix the heat dissipation components. The second heat dissipation fins 32 extend into the ventilation channel 13. The cooling fan 4 is fixedly installed on the outside of the housing 1, and its air outlet is connected to the air inlet or air outlet. The first heat dissipation fins 22 and the second heat dissipation fins 32 are arranged at intervals in the ventilation channel 13. The first mounting plate 21 is located above the second mounting plate 31 and together they form the ventilation channel 13.

[0035] The housing 1 is made of die-cast aluminum alloy and has a rectangular structure. The interior of housing 1 is divided into an upper cavity 11, a lower cavity 12, and a ventilation channel 13 located between them. The ventilation channel 13 is completely isolated from the upper cavity 11 and the lower cavity 12 to prevent dust and moisture from entering the ventilation channel 13 and affecting heat dissipation efficiency. The side walls of housing 1 have air inlets and outlets, which are connected to the two ends of the ventilation channel 13.

[0036] The first mounting plate 21 of the first heat dissipation section 2 is a rectangular aluminum plate, and its edge is fixed to the mounting steps on the inner sidewall of the upper cavity 11 by bolts. The upper surface of the mounting plate is machined with multiple threaded holes for fixing the voltage regulator circuit board, and the hole spacing matches the mounting holes of the voltage regulator circuit board. The first heat dissipation fins 22 are thin aluminum sheets, and multiple fins are arranged in parallel and spaced apart. One side of the fin is integrally formed with the lower surface of the first mounting plate 21, and the other side extends vertically downward into the ventilation channel 13.

[0037] The second mounting plate 31 of the second heat dissipation section 3 is also a rectangular aluminum plate, integrally formed on the inner wall of the lower cavity 12, and the lower surface is machined with mounting holes for components such as capacitors and rectifier bridges. The second heat dissipation fin 32 has the same structure as the first heat dissipation fin 22. One side of the fin is integrally formed with the upper surface of the second mounting plate 31, and the other side extends vertically upward into the ventilation channel 13.

[0038] The cooling fan 4 is an axial fan, which is fixed to the outside of the left wall of the box 1 by a fan bracket. The bracket is connected to the box 1 by bolts, and the fan nozzle is connected to the air inlet to ensure that all airflow enters the ventilation duct 13.

[0039] The first heat dissipation fin 22 and the second heat dissipation fin 32 are arranged at intervals within the ventilation channel 13. When the cooling fan 4 is started, external cold air enters the ventilation channel 13 from the air inlet, flows through the gap between the first and second heat dissipation fins 32 in sequence, carries away the heat absorbed by the components by the fins, and is then discharged from the air outlet, thus achieving effective heat dissipation.

[0040] In this embodiment, the extending directions of the first heat dissipation fins 22 and the second heat dissipation fins 32 are the same as the extending direction of the ventilation duct 13.

[0041] Specifically, the ventilation duct 13 extends horizontally from the air inlet to the air outlet (i.e., the left-right direction of the housing 1). The first heat dissipation fin 22 extends downward from the first mounting plate 21, with its length parallel to the extension direction of the ventilation duct 13. The second heat dissipation fin 32 is also arranged along the extension direction of the ventilation duct 13. This structure allows airflow to pass smoothly along the length of the fins when flowing within the ventilation duct 13, reducing airflow resistance and improving heat dissipation efficiency.

[0042] In this embodiment, the first heat dissipation fins 22 and the second heat dissipation fins 32 are distributed alternately.

[0043] Specifically, the arrangement of the first heat dissipation fins 22 and the second heat dissipation fins 32 is staggered in the horizontal direction, meaning that each first heat dissipation fin 22 is located between two adjacent second heat dissipation fins 32. This staggered structure allows the airflow to make more sufficient contact with the fins when passing through the air passage 13, avoiding airflow dead zones, making the temperature distribution on the fin surface uniform, and further improving heat dissipation efficiency.

[0044] In this embodiment, both the first mounting plate 21 and the second mounting plate 31 are provided with through grooves 5, which are used to connect the upper cavity 11 and the lower cavity 12.

[0045] Specifically, the upper cavity 11 and the lower cavity 12 are internally connected by a through slot 5, which facilitates the passage of cables within the cavity through which the components connecting the upper and lower cavities pass. The edges of the through slot 5 are chamfered to prevent cable wear. At the same time, the through slot 5 is positioned away from the installation area of ​​the heat sink fins to ensure that heat dissipation performance is not affected.

[0046] In this embodiment, the top of the box body 1 is provided with a top cover 6, which is detachably connected to the box body 1 by bolts. Specifically, the top cover 6 is a rectangular aluminum plate that matches the opening at the top of the box body 1, and is detachably connected to the flange edge at the top of the box body 1 by bolts.

[0047] In this embodiment, the bottom of the box body 1 is provided with a bottom plate 7, which is detachably connected to the box body 1 by bolts. Specifically, the bottom plate 7 is a rectangular aluminum plate that matches the bottom opening of the box body 1, and is detachably connected to the flange edge at the bottom of the box body 1 by bolts.

[0048] In this embodiment, a plurality of third heat dissipation fins 8 are integrally formed on the end face of the housing 1 that is attached to the cooling fan 4. Specifically, when the fan is working, the airflow flows over the surface of the third heat dissipation fins 8, carrying away the heat of the housing 1, thereby reducing the overall temperature of the housing 1 and improving the heat dissipation effect.

[0049] In this embodiment, the cooling fan 4 is a blower fan or an exhaust fan.

[0050] Specifically, when a blower fan is used, the fan's outlet is connected to the air inlet, forcing external cool air into the ventilation duct 13 to create a positive pressure airflow. When an exhaust fan is used, the fan's inlet is connected to the air outlet, drawing hot air out of the ventilation duct 13 to create a negative pressure airflow, allowing external cool air to be naturally drawn in through the air inlet. Both methods can achieve airflow circulation within the ventilation duct 13, and the appropriate method can be selected based on installation space and heat dissipation requirements in practical applications.

[0051] When the cooling device is working, the cooling fan 4 drives airflow within the ventilation duct 13. The first mounting plate 21 of the upper cavity 11 and the second mounting plate 31 of the lower cavity 12 respectively fix the heat dissipation components. The heat generated by the components is conducted through the mounting plates to the first heat dissipation fins 22 and the second heat dissipation fins 32 extending into the ventilation duct 13. Because the fins extend in the same direction as the ventilation duct 13 and are staggered, the airflow can flow smoothly through the gaps between the fins, fully contacting the fins to carry away heat and expelling it from the outlet. This combination of forced air cooling and efficient heat conduction improves heat dissipation efficiency.

[0052] The beneficial effects of this application include:

[0053] 1. Space and heat dissipation optimization: The upper and lower cavity separation design enables the partitioned installation of components, reducing space occupation; the independent ventilation channel 13 is equipped with staggered heat dissipation fins, combined with the cooling fan 4 for forced ventilation, which greatly improves the heat dissipation area and airflow contact efficiency, and solves the heat dissipation bottleneck in small and confined environments.

[0054] II. Enhanced Structural Performance: The heat dissipation fins extend in the same direction as the airflow, reducing wind resistance and avoiding turbulence loss; the second mounting plate 31 is integrally formed with the box body 1, improving structural stability and reducing the impact of vibration; the aluminum alloy material ensures efficient heat conduction while meeting the requirements of lightweight and high strength.

[0055] III. Maintainability and Adaptability: The removable top cover 6 / bottom plate 7 facilitates component installation and maintenance; the through slot 5 design enables wiring connection between the two cavities, taking into account both wiring convenience and independent heat dissipation; the fan type can be flexibly adapted to different installation scenarios.

[0056] IV. Enhanced auxiliary heat dissipation: A third heat dissipation fin 8 is added to the contact surface between the box 1 and the fan to help reduce the overall temperature.

[0057] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0058] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A novel motor controller cooling device, characterized in that, include: The box body has an upper cavity, a lower cavity, and a venting channel between them. The venting channel is isolated from both the upper cavity and the lower cavity. The box body wall has an air inlet and an air outlet that are respectively connected to the two ends of the venting channel. The first heat dissipation part includes a first mounting plate and a plurality of first heat dissipation fins integrally formed on the first mounting plate. The first mounting plate is fixed in the upper cavity and used to fix the heat dissipation components. The first heat dissipation fins extend into the ventilation channel. The second heat dissipation section includes a second mounting plate and a plurality of second heat dissipation fins integrally formed on the second mounting plate. The second mounting plate is fixed in the lower cavity and is used to fix the heat dissipation components. The second heat dissipation fins extend into the ventilation channel. A cooling fan is fixedly installed on the outside of the housing, and its air outlet is connected to the air inlet or air outlet. The first and second heat dissipation fins are arranged at intervals within the air duct.

2. The novel motor controller cooling device according to claim 1, characterized in that, The first and second heat dissipation fins are arranged in the same direction as the air duct.

3. The novel motor controller cooling device according to claim 2, characterized in that, The first heat dissipation fins and the second heat dissipation fins are distributed alternately.

4. The novel motor controller cooling device according to claim 1, characterized in that, The second mounting plate is integrally formed inside the box body, and the first mounting plate is fixedly connected above the second mounting plate to form the ventilation channel together.

5. The novel motor controller cooling device according to claim 4, characterized in that, Both the first mounting plate and the second mounting plate are provided with through slots, which are used to connect the upper cavity and the lower cavity.

6. The novel motor controller cooling device according to claim 1, characterized in that, The top of the box is provided with a top cover, which is detachably connected to the box by bolts.

7. The novel motor controller cooling device according to claim 1, characterized in that, The bottom of the box is provided with a base plate, which is detachably connected to the box by bolts.

8. The novel motor controller cooling device according to claim 1, characterized in that, The box body has multiple third heat dissipation fins integrally formed on the end face of the cooling fan.

9. The novel motor controller cooling device according to claim 1, characterized in that, The cooling fan is either a blower fan or an exhaust fan.

10. The novel motor controller cooling device according to claim 1, characterized in that, The box body, the first mounting plate, and the second mounting plate are all made of aluminum alloy.

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