Ceiling fan heat dissipation structure

Abstract

A ceiling fan heat dissipation structure, comprising a heat dissipation plate, the heat dissipation plate is in heat conduction connection with the driving plate of the ceiling fan, and has heat dissipation fins thereon, the motor is an outer rotor motor, the lower end cover is connected with the outer rotor, the lower surface of the lower end cover has a plurality of blades arranged in a spiral vortex shape along the center thereof, the vortex direction is consistent with the direction of the lower end cover rotating with the outer rotor, the heat dissipation plate is located below the lower end cover, the upper surface of the heat dissipation plate has a plurality of heat dissipation fins, the lower surface has a plurality of connecting columns connected with the driving plate, and the lower surface is also in heat conduction connection with the driving plate through a heat conduction module, the central positions of the lower end cover and the heat dissipation plate are sequentially penetrated by the motor shaft, and the heat dissipation plate is fixed on the motor shaft. The utility model discloses a spiral vortex blade is arranged on the lower surface of the lower end cover of the outer rotor motor, can actively introduce external air to form directional airflow, extrude and discharge the heat of the heat dissipation fin on the heat dissipation plate quickly, and the convection heat dissipation efficiency is significantly enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of ceiling fan technology, and in particular relates to a ceiling fan heat dissipation structure. Background Technology

[0002] Current ceiling fan drive boards typically use plate-shaped heat sinks for heat dissipation, with fins on the surface to increase the heat dissipation area. However, this structure relies solely on natural convection and passive cooling from the fins, resulting in low heat dissipation efficiency. Especially during prolonged operation or in high-temperature environments, the heat generated by the drive board is difficult to dissipate quickly, easily leading to overheating. This can cause circuit performance degradation, accelerated component aging, and even malfunctions, affecting the ceiling fan's lifespan and operational stability. Utility Model Content

[0003] Based on this, a ceiling fan heat dissipation structure is provided to address the aforementioned technical problems.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A ceiling fan heat dissipation structure includes a heat dissipation plate, which is thermally connected to the drive plate of the ceiling fan and has heat dissipation fins. The motor is an external rotor motor, with a lower end cover connected to the external rotor. The lower surface of the lower end cover has multiple blades arranged radially in a vortex pattern along its center, the vortex direction being consistent with the direction of rotation of the lower end cover with the external rotor. The heat dissipation plate is located below the lower end cover, with multiple heat dissipation fins on its upper surface and multiple connecting posts on its lower surface connected to the drive plate. The lower surface and the drive plate are also thermally connected via a heat-conducting module. The center positions of the lower end cover and the heat dissipation plate are sequentially passed through by a motor shaft, and the heat dissipation plate is fixed to the motor shaft.

[0006] The beneficial effects of this utility model are as follows:

[0007] 1. High-efficiency active heat dissipation: By setting radial vortex-shaped blades on the lower surface of the lower end cover of the external rotor motor, and with the vortex direction of the blades being consistent with the rotation direction of the lower end cover, when the motor is running, the blades rotate synchronously with the external rotor, which can actively introduce external air to form a directional airflow, quickly squeezing out the heat from the heat sink on the heat dissipation plate, significantly enhancing the convective heat dissipation efficiency. Through efficient heat dissipation, the aging speed of the components on the drive board is effectively slowed down, circuit failures caused by overheating are reduced, and the operational stability and service life of the ceiling fan are significantly improved.

[0008] 2. No additional energy consumption required: The airflow is generated by the rotation of the motor itself to drive the blades, eliminating the need for additional cooling fans or power devices, thus avoiding increased energy consumption and noise generation, and meeting the requirements of energy-saving and quiet design. Attached Figure Description

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0010] Figure 1 A three-dimensional structural diagram of an industrial ceiling fan provided for an embodiment of this utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the hoisting base according to an embodiment of the present utility model;

[0012] Figure 3 This is a vertical sectional view of the motor according to an embodiment of the present utility model;

[0013] Figure 4 This is a schematic diagram of the structure of the lower end cover of the motor according to an embodiment of the present utility model;

[0014] Figure 5 This is a schematic diagram of the structure of the fan blade and the leaf stalk in an embodiment of the present utility model;

[0015] Figure 6 This is a schematic diagram of the structure of the heat sink according to an embodiment of the present utility model;

[0016] Figure 7 This is a schematic diagram showing the cooperation between the lower end cover and the heat sink in an embodiment of the present utility model;

[0017] Figure 8 This is a three-dimensional structural diagram of the base from a lower perspective according to an embodiment of the present utility model;

[0018] Figure 9 This is a schematic diagram showing the interaction between the drive board and the lighting ring with the base in an embodiment of this utility model;

[0019] Figure 10 This is a schematic diagram of the heat sink being supported by a support nut in an embodiment of the present invention;

[0020] Figure 11 In the diagram, (a) is a schematic diagram of the upward angle of the petiole extension in an embodiment of the present invention, and (b) is a schematic diagram of the deflection angle of the petiole extension in an embodiment of the present invention. Detailed Implementation

[0021] The embodiments of this utility model will be described below with reference to the accompanying drawings. It should be noted that the embodiments described in this specification are not exhaustive and do not represent the only embodiments of this utility model. The following corresponding embodiments are only for clearly illustrating the utility model content of this patent and are not intended to limit its implementation. For those skilled in the art, different variations and modifications can be made based on the described embodiments. Any obvious variations or modifications that fall within the technical concept and utility model content of this utility model are also within the protection scope of this utility model.

[0022] like Figure 1 and Figure 2 As shown in the figure, this application provides an industrial ceiling fan, including a mounting base 1100, a hanging rod 1200, a motor 1300, fan blades 1400, blade handles 1500, a heat sink 1600, a base 1700, a drive plate 1800, a lighting ring 1900, a lampshade 1998, and a decorative cover 1999.

[0023] like Figure 2 As shown, the lifting base 1100 is made of metal and includes a horizontal lifting plate 1110. The lifting plate 1110 is rectangular and is integrally stamped after laser cutting to form an outer frame 1111, two 90-degree downward folding flaps 1112, and a middle part 1113 located between the two flaps 1112.

[0024] The outer frame 1111 has multiple first mounting holes 1111a in the vertical direction, and its front and rear edges have reinforcing edges 1111b that are folded downwards.

[0025] Two flaps 1112 are arranged symmetrically along the left and right axes of the middle part 1113, and the two flaps are used to install the hanger 1200. The two flaps 1112 have multiple second mounting holes 1112a that are opposite to each other.

[0026] To improve strength and prevent the boom 1200 from swaying, two reinforcing ribs 1112b are formed on the two flaps 1112, arranged front to back. Each reinforcing rib 1112b extends from the upper front of one flap 1112 through the front of the middle part 1113 to the upper front of the other flap 1112.

[0027] like Figure 1 and Figure 2 As shown, the lifting rod 1200 is a round tube with a square radial cross-section at its upper end. The mounting head 1210 has multiple first bolt holes corresponding to multiple second mounting holes 1112a. The width of the mounting head 1210 is consistent with the spacing between the two flaps 1112, and it is sandwiched between the two flaps 1112. It is fixed to the lifting base 1100 by bolts passing through the second mounting holes 1112a and the first bolt holes.

[0028] The above-mentioned hoisting structure effectively solves the problems of low strength and poor reliability of traditional welded hoisting seats, and is suitable for industrial ceiling fan scenarios with high requirements for safety and stability.

[0029] Motor 1300 is used to drive fan blade 1400 to rotate, such as Figure 3 As shown, in this embodiment, the motor 1300 is an external rotor motor, which consists of a motor shaft 1310, an inner stator 1320 fixed on the motor shaft 1310, an outer rotor 1330, and a lower end cover 1340.

[0030] The upper end of the motor shaft 1310 is inserted into the lower end of the lifting rod 1200 and fixed by bolts passing through both. The lower part of the motor shaft 1310 is a threaded section 1311. See [link / reference]. Figure 7 .

[0031] The outer rotor 1330 includes an upper housing and a circumferential housing of the motor. The middle of the upper housing is passed upward by the motor shaft 1310, and a bearing is located between the two. Figure 3 As shown, the lower edge of the circumferential housing extends radially outward to form an annular mounting plate 1331 for fixing the fan blade 1400.

[0032] like Figure 5 As shown, the lower end cover 1340 is fixed to the lower surface of the mounting plate 1331 by bolts, and its center is passed downward by the motor shaft 1310. A bearing is located between the two, allowing the lower end cover 1340 to rotate with the outer rotor 1330 around the motor shaft 1310. (See also...) Figure 3 .

[0033] like Figure 4 As shown, the lower surface of the lower end cover 1340 has multiple blades 1341 arranged radially in a vortex pattern along its center. Each blade 1341 extends radially outward from the center of the lower end cover 1340 to its edge. The blades 1341 are arc-shaped, and the multiple blades 1341 form a vortex arrangement. The vortex direction is consistent with the rotation direction of the lower end cover 1340. When the lower end cover 1340 rotates counterclockwise, the counterclockwise vortex arrangement can introduce airflow between adjacent blades 1341 for heat exchange with the heat sink 1600. To increase the pressure of the introduced airflow, the lower surface of the lower end cover 1340 has an upwardly recessed circular groove 1342, which is concentric with the lower end cover 1340.

[0034] To ensure smooth and stable airflow, the lower edge of the head section 1341a of the blade 1341, which is near the edge of the lower end cover 1340, is lower than the lower edge of the rest of the blade.

[0035] like Figure 1 As shown, there are 6 fan blades 1400 and 6 blade holders 1500. The fan blades 1400 are fixed to the mounting plate 1331 of the motor 1300 through the corresponding blade holders 1500.

[0036] Specifically, such as Figure 5 As shown, the left edge of the fan blade 1400 is the windward edge 1410, and the right side forms a downward folded wind-attracting edge 1420. The upper surface of the fan blade 1400 has a reinforcing ridge 1430 extending along the length direction.

[0037] The petiole is stamped from 1500, such as Figure 5As shown, with L1 as the dividing line, it includes a horizontal root portion 1510 and an extension portion 1520 extending forward from the root portion 1510. The root portion 1510 is fixed to the upper surface of the mounting plate 1331 by bolts, and the extension portion 1520 is fixed to the upper surface of the rear end of the reinforcing ridge 1430 by bolts.

[0038] The extension 1520 curves upwards by 2 degrees relative to the root 1510; the angle α between the extension 1520 and the horizontal plane is 2 degrees (see...). Figure 11 (a)) This causes the fan blade 1400 to also tilt upwards relative to the horizontal plane (rotation plane). In this way, when the fan blade 1400 rotates, it can not only "push" the air tangentially (along the rotation circumference) but also "push" the air radially (radiating outwards from the center), thereby increasing the area of ​​airflow diffusion in all directions when the fan blade 1400 is working.

[0039] At the same time, the extension 1520 is also deflected by 5 degrees: the angle β between the extension 1520 and the horizontal plane is 5 degrees (see...). Figure 11 (b) That is, the left edge of the extension 1520 is higher than its right edge, so that the windward edge on the left side of the fan blade 1400 is higher than the folded edge on the right side, thereby making the reinforcing rib 1430 lower than the airflow path and hidden on the leeward side of the fan blade 1400, thereby reducing the wind resistance on the upper surface of the fan blade 1400.

[0040] It should be noted that the aforementioned angles α and β can be adjusted according to the actual usage scenario. For example, angle α can be adjusted within 1-3 degrees, and angle β can be adjusted within 4-6 degrees.

[0041] It is evident that the above structure not only ensures the strength of the fan blades, but also increases the area for airflow to diffuse in all directions, reduces wind resistance, improves heat dissipation efficiency, and results in low motor load and low noise.

[0042] like Figure 3 As shown, the heat sink 1600 and the base 1700 are both located below the lower end cover 1340 from top to bottom, and the center of both is passed downward by the motor shaft 1310.

[0043] like Figure 6 As shown, the heat sink 1600 is disc-shaped, and its diameter is consistent with the inner diameter of the circular groove 1342 on the lower surface of the lower end cover 1340, and it corresponds exactly to the circular groove 1342. The upper surface of the heat sink 1600 has multiple vertical heat sinks 1610.

[0044] like Figure 3 , Figure 7 and Figure 10As shown, the heat sink 1600 extends downward through the central hole through which the motor shaft 1310 passes to form a sleeve 1620. The lower end of the sleeve 1620 is supported by a support nut 1621, which is threadedly connected to the threaded section 1311 at the lower part of the motor shaft 1310.

[0045] like Figure 7 As shown, the lower surface of the heat sink 1600 has multiple connecting posts 1630 for connecting the drive board 1800. The lower surface of the heat sink 1600 and the drive board 1800 are also thermally connected through a heat conduction module 1640, which conducts the heat generated by the drive board 1800 to the heat sink 1600. Finally, the air introduced by the blades 1341 of the lower end cover 1340 squeezes the heat on the heat sink 1610 out, thus achieving efficient heat dissipation of the drive board 1800.

[0046] The base 1700 is used to mount the driver board 1800 and the lighting ring 1900, such as Figure 8 As shown, it includes an annular outer shell 1710, an outer ring 1720, a middle ring 1730, and an inner ring 1740, with the center lines of the four rings coinciding.

[0047] A gap exists between the annular outer casing 1710 and the head section 1341a of the upper blade 1341 for air intake and exhaust of the blades 1341 of the lower end cover 1340. See [reference needed]. Figure 3 , Figure 5 and Figure 9 .

[0048] like Figure 8 As shown, the outer ring 1720 is formed on the inner surface of the annular outer shell 1710, the middle ring 1730 is located radially inside the outer ring 1720, and the two are connected by a plurality of first spokes 1750, with a plurality of first heat dissipation holes 1751 formed between the plurality of first spokes 1750, and the inner ring 1740 is located radially inside the middle ring 1730, and the two are connected by a plurality of second spokes 1760, with a plurality of second heat dissipation holes 1761 formed between the plurality of second spokes 1760.

[0049] The annular outer shell 1710 is divided into an upper cavity and a lower cavity by an outer ring 1720, a middle ring 1730 and an inner ring 1740. The upper cavity houses the heat sink 1600, and the lower cavity houses the drive plate 1800 and the lighting ring 1900.

[0050] The lower surface of the outer ring 1720 has an annular step 1721, which is flush with the lower surface of the first spoke 1750 and the lower surface of the middle ring 1730. The annular step 1721 has an upwardly recessed annular groove 1721a.

[0051] The inner ring 1740 is fixed to the heat sink 1600 by bolts and is passed through the sleeve 1620 of the heat sink 1600.

[0052] The driver board 1800 is electrically connected to the lighting ring 1900 and the motor 1300, and is used to control the lighting ring 1900 and the motor 1300, such as... Figure 9 As shown, it is located below the inner ring 1740, and is disc-shaped. Its outer diameter is no larger than the outer diameter of the inner ring 1740, so it will not obstruct the second heat dissipation hole 1761. Figure 10 As shown, the drive board 1800 is connected to multiple connecting posts 1630 on the lower surface of the heat sink 1600, and its center is penetrated by the sleeve 1620 of the heat sink 1600.

[0053] The 1900 lighting ring is an LED ring, such as... Figure 9 As shown, it includes an annular aluminum substrate 1910 and multiple LED light-emitting units 1920 fixed on the lower surface of the aluminum substrate 1910.

[0054] The upper surface of the aluminum substrate 1910 has a ring-shaped protrusion that engages and fixes with the ring groove 1721a on the lower surface of the outer ring 1720. The upper surface of the aluminum substrate 1910 is in contact with the ring step 1721, the lower surface of the first spoke 1750 and the lower surface of the middle ring 1730. The upper surface of the aluminum substrate 1910 corresponds to the first heat dissipation hole 1751, which can dissipate heat from the lighting ring 1900.

[0055] The driver board 1800 and the lighting ring 1900 can also be further cooled through the second heat dissipation hole 1761, which improves the heat dissipation performance.

[0056] The lampshade 1998 is snapped into the lower end of the annular housing 1710, enclosing the drive board 1800 and the lighting ring 1900 inside it.

[0057] like Figure 1 As shown, the decorative cover 1999 is trumpet-shaped, and there are two of them. They cover the upper part of the lifting base 1100 and the lifting rod 1200, as well as the lower part of the motor shaft 1310 and the lifting rod 1200, respectively, for aesthetic purposes. The narrow end of the decorative cover 1999 is bolted to the lifting rod 1200.

[0058] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Images