A plug-in waterproof fan

Abstract

This invention discloses a pluggable waterproof fan, belonging to the field of fan technology. It includes a fan base frame, a motor and impeller assembly mounted on one side of the fan base frame, and a PCB assembly detachably mounted on the other side of the fan base frame. The PCB assembly includes a base, a PCBA encapsulated within the base by a potting layer, and a female connector protruding from the potting layer from the PCBA terminals. The motor includes terminals and a wiring assembly connecting the terminals and penetrating the fan base frame; the wiring assembly is pluggably connected to the female connector. The PCB assembly in this technical solution has improved waterproof performance and is easy and quick to assemble and disassemble, improving fan maintenance efficiency.

Description

Technical Field

[0001] This invention belongs to the field of fan technology, specifically relating to a plug-in waterproof fan. Background Technology

[0002] Centrifugal fans are machines that increase gas pressure and discharge gas. They typically consist of a frame, impeller, fan shaft, motor, and PCB assembly. The PCB assembly and motor are connected by wiring, and the motor is then installed in the frame. The fan shaft, which connects to the impeller, is inserted into the motor. The motor drives the fan shaft to rotate, which in turn drives the impeller to rotate.

[0003] Existing centrifugal fans are generally large-sized structures, requiring assembly of individual components before use. The assembly process typically involves first connecting the PCB assembly to the motor, then fixing the frame, inserting the PCB assembly and motor into or outside the frame, and finally inserting the fan shaft connecting the impeller into the center of the motor, or fixing the motor's output shaft to the impeller. After testing and debugging, the fan is operated to complete the assembly. The assembled fan has a high risk of water leakage, especially the PCB assembly, where the electronic components can be damaged by water or moisture. Furthermore, this assembly process is time-consuming, and repairing the PCB assembly in case of fan malfunction requires disassembling the centrifugal fan in sequence, reducing maintenance efficiency, increasing the scrap rate of disassembled parts, and raising costs. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: a pluggable waterproof fan, including a fan base frame, a motor and impeller assembly mounted on one side of the fan base frame, and a PCB assembly detachably mounted on the other side of the fan base frame;

[0005] The PCB assembly includes a base, a PCBA encapsulated within the base by a potting layer, and a female connector protruding from the PCBA terminal through the potting layer.

[0006] The motor includes terminals and a wiring assembly that connects to the terminals and penetrates the fan base frame. The wiring assembly is pluggably connected to the female connector.

[0007] Specifically, the fan base frame has at least three pillars around its edge facing the PCB assembly, and the base sidewall of the PCB assembly has a recess that mates with the pillars.

[0008] Specifically, the base is fastened to the fan base frame. Specifically, the outer wall of the column is provided with a locking block, and the outer wall of the base close to the column is provided with locking teeth that cooperate with the locking block. The locking teeth are fastened to the locking block as the PCB assembly moves axially along the fan base frame.

[0009] Specifically, the PCB assembly also includes a seal, which is an annular rubber pad with a shape consistent with the upper port of the bottom frame, and the annular rubber pad is located between the fan bottom frame and the base.

[0010] Specifically, the female connector includes a pipe segment with a wiring hole. The pipe segment has a first end and a second end that are arranged opposite to each other. The width of the wiring hole gradually decreases and then gradually increases from the first end to the second end. The pipe segment has a lateral opening near the second end.

[0011] Specifically, a strip-shaped groove is provided in the middle of the pipe section near the second end, and the groove opening extends to below the opening.

[0012] Specifically, the wiring assembly includes a first plug-in for connecting to the motor, a second plug-in inserted vertically from the second end into the female connector, and a piece that passes through the fan base frame, wherein the piece located between the first plug-in and the fan base frame extends to both sides and bends to form a limiting portion.

[0013] Specifically, the fan base frame has an integrally formed central column on the side away from the PCB assembly. The motor is assembled on the outer periphery of the central column. The impeller assembly includes a housing sleeved on the outside of the motor, a fan shaft fixedly connected to the housing, a magnetic ring fixed on the inner wall of the housing, and several blades. The fan shaft is inserted into the central column and rotates relative to the fan base frame under the drive of the motor.

[0014] Specifically, a reinforcing magnetic ring is fitted around the outer periphery of the housing.

[0015] Specifically, the fan base frame is fitted with an insulating chassis facing the motor side, and a through hole is opened in the center of the insulating chassis to avoid the central column, and its edge extends towards the motor side to form a retaining edge.

[0016] The technical solution provided by this invention has the following advantages compared with the prior art:

[0017] 1. The PCB assembly forms a detachable complete structure relative to the fan. The PCBA is fully encapsulated with potting compound, which improves waterproof performance and ensures safety and reliability. In case of fan malfunction, the PCB assembly can be directly removed from the fan for replacement, which is convenient and quick, improves fan maintenance efficiency, avoids the scrapping of the entire fan and the scrapping of parts caused by disassembly, and reduces costs.

[0018] 2. Install sealing components and an insulating base to seal the gaps on the upper and lower sides of the wiring assembly. Further improve the waterproof performance on the basis of potting, reduce the risk of water seepage from the gaps, ensure the normal conduction of the wiring lines, and ensure the normal operation of the fan. Attached Figure Description

[0019] Figure 1 This is an exploded view of the plug-in waterproof fan in an embodiment of the present invention;

[0020] Figure 2 This is an axial sectional view of the plug-in waterproof fan in an embodiment of the present invention;

[0021] Figure 3 This is a structural diagram of the fan base frame in an embodiment of the present invention;

[0022] Figure 4 This is a connection diagram of the fan base frame in an embodiment of the present invention;

[0023] Figure 5 This is an exploded view of the PCB assembly in an embodiment of the present invention;

[0024] Figure 6 This is a connection diagram of the wiring assembly and the female connector in an embodiment of the present invention.

[0025] The figure shows: 1. Fan base frame; 11. Base frame body; 12. Center column; 13. Groove; 14. Through hole; 15. Column; 16. Locking block; 2. Motor; 21. Silicon steel sheet; 22. Coil winding; 23. Wiring assembly; 231. Sheet body; 232. First insert; 233. Second insert; 234. Limiting part; 3. Impeller assembly; 31. Housing; 32. Fan shaft; 33. Magnetic ring; 34. Blade; 35. Bearing; 36. Spring sleeve; 37. Reinforcing magnetic ring; 4. PCB assembly; 41. Base; 42. PCBA; 43. Female connector; 431. Pipe section; 432. Strip groove; 433. First end; 434. Second end; 44. Encapsulation layer; 45. Seal; 46. Locking tooth; 47. Recess; 5. Insulating chassis; 51. Edge retainer. Detailed Implementation

[0026] For ease of understanding, the plug-in waterproof fan is described below with reference to embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] like Figures 1 to 2 As shown, a pluggable waterproof fan includes a fan base frame 1, a motor 2, an impeller assembly 3, and a PCB assembly 4. The motor 2 is fixedly installed on the top of the fan base frame 1, and the impeller assembly 3 is also installed thereon. The impeller assembly 3 can rotate relative to the fan base frame 1 under the drive of the motor 2. The PCB assembly 4 is assembled to the lower end of the fan base frame 1 through a hook. The connection of the hook can be released, and the PCB assembly 4 can be removed from the lower end of the fan base frame 1. In case of fan malfunction, the PCB assembly 4 can be directly removed and replaced with a new one, avoiding the scrapping of the entire fan due to the damage of a single part.

[0030] The motor 2 includes a silicon steel sheet 21, a coil winding 22 wound on the silicon steel sheet 21, a terminal block electrically connected to the coil winding 22, and a wiring assembly 23 connected to the terminal block and penetrating the fan base frame 1. The silicon steel sheet 21 and the coil winding 22 are both located on the outside of the center column 12 and on the inside of the magnetic ring 33.

[0031] The impeller assembly 3 includes a housing 31 fitted outside the motor 2, a fan shaft 32 fixedly connected to the housing 31, a magnetic ring 33 fixed to the inner wall of the housing 31, several blades 34, bearings 35, and a spring sleeve 36. A reinforcing magnetic ring 37 is fitted around the outer periphery of the housing 31 to increase the driving force of the motor 2. The fan shaft 32 is fitted with the spring sleeve 36 and two bearings 35 in a vertical direction from top to bottom, and then inserted into the central column 12. The fan shaft 32 can rotate relative to the central column 12. Specifically, the wiring terminals of the PCB assembly 4 are electrically connected to the female connector 43, the female connector 43 is electrically connected to the wiring assembly 23, the wiring assembly 23 is electrically connected to the wiring terminal, and the wiring terminal is electrically connected to the coil winding 22. When the coil winding 22 is energized, it drives the magnetic ring 33 to rotate, thereby driving the impeller assembly 3 as a whole to rotate relative to the fan base frame 1.

[0032] like Figures 3 to 5As shown, the fan base frame 1 includes a circular base frame 11. A hole is provided in the middle of the base frame 11. A central column 12 is integrally formed with the base frame 11 by extending upward around the hole. A lower flange is formed by extending downward around the hole. An upper flange is formed by extending upward around the edge of the base frame 11. An annular groove 13 with a downward indentation 47 is formed between the upper flange and the central column 12. An insulating base 5 is embedded in the annular groove 13. An avoidance hole is provided in the center of the insulating base 5 to avoid the central column 12, and its edge extends towards the motor 2 to form a baffle 51. The baffle 51 has the functions of insulation protection and waterproofing. The insulating base 5 and the base frame 11 also have three through holes 14 that are aligned with each other. The number of through holes 14 corresponds one-to-one with the number of wiring assemblies 23.

[0033] The lower edge of the base frame 11 is provided with four columns 15. The diameter of the circle containing the inner arc surface of the column 15 is smaller than the diameter of the circle containing the outer arc surface. The outer arc surface has the same diameter as the outer arc surface of the base 41. The outer arc surface of the column 15 matches the outer arc surface of the base 41. The four columns 15 limit the PCB assembly 4 and assist in guiding it during installation.

[0034] like Figure 6 As shown, the wiring assembly 23 includes a plate 231 passing through the through hole 14, two first inserts 232 extending upward in the vertical direction, and a second insert 233 extending downward in the vertical direction. The first inserts 232 are inserted into the wiring terminals, and the second insert 233 is inserted into the female socket 43 in the vertical direction as the PCB assembly 4 is assembled. Specifically, the PCB assembly 4 is also moved and assembled onto the fan base frame 1 in the vertical direction. The plate 231 located between the first insert 232 and the insulating base 5 extends to both sides and bends to form a limiting part 234. The limiting part 234 can increase the strength of the wiring assembly 23 itself, prevent the plate head or the two inserts from curling and deforming in the vertical direction due to repeated insertion and removal, and at the same time, it can limit the position of the wiring assembly 23 to a specific position, preventing the wiring assembly 23 from falling out of the through hole 14.

[0035] like Figures 2 to 3 As shown in the figure, the PCB assembly 4 includes a base 41, a PCBA 42 encapsulated in the base 41 by a potting layer 44, a female connector 43 extending from the terminal of the PCBA 42 through the potting layer 44, and a seal 45. The PCBA 42 is fully potted, highly waterproof, and highly reliable. The base 41 is laterally recessed 47 to avoid the column 15. The base 41 is fastened to the fan base frame 1. Specifically, the outer wall of the column 15 is provided with a locking block 16, and the outer wall of the base 41 close to the column 15 is provided with a locking tooth 46. The locking tooth 46 is fastened to the locking block 16 as the PCB assembly 4 moves axially along the fan base frame 1. This design makes the assembly of the PCB assembly 4 convenient and quick.

[0036] like Figure 6As shown in the figure, the female connector 43 includes a tube segment 431 with a wiring hole. The tube segment 431 has a first end 433 and a second end 434 disposed opposite each other. Along the first end 433 to the second end 434, the width of the wiring hole gradually decreases and then gradually increases. The wiring terminal of the PCBA 42 is inserted into the wiring hole from the first end 433. The tube segment 431 has a lateral opening near the second end 434, meaning that there are no sidewalls on both sides of the second end 434 of the tube segment 431. The second end 434 of the tube segment 431 has a narrowing wiring hole. Eliminating the restriction of the side wall on the wiring hole ensures that when the second insert 233 is inserted into the wiring hole from the second end 434, the remaining two side walls of the pipe segment 431 at the second end 434 can be separated to both sides under the pressure of the second insert 233, ensuring that the second insert 233 can be inserted into the pipe segment 431 and that the two are tightly connected. A strip groove 432 is provided in the middle of the pipe segment 431 near the second end 434, and the groove opening of the strip groove 432 extends to below the opening, increasing the maximum deformation value of the second end 434 of the pipe segment 431.

[0037] like Figure 4 As shown in the figure, the sealing element 45 is an annular rubber pad with the same shape as the upper port of the bottom frame. The annular rubber pad is located between the fan bottom frame 1 and the base 41. After the base 41 is fastened onto the fan bottom frame 1, it squeezes the sealing element 45, thereby sealing the space between the potting layer 44 and the bottom frame body 11, ensuring the safety of the connection between the female seat 43 and the second insert 233, preventing water seepage from the gaps on the basis of potting, and reducing risks.

[0038] Assembly steps: Assemble the insulating base 5 on the fan base frame 1; insert the wiring assembly 23 into the through holes 14 of the base frame 11 and the insulating base 5 from top to bottom, with the second insert 233 of the wiring assembly 23 passing through the through holes 14; install the silicon steel sheet 21 with the coil winding 22 already wound, with the first insert 232 inserted into the terminal of the coil winding 22, completing the motor 2 installation; assemble the fan shaft 32 from the already assembled impeller assembly 3 into the center column 12; place the PCBA 42 into the base 41, connecting the terminals of the PCBA 42 to the female connector 43; encapsulate the PCBA with potting compound. 42. The height of the potting layer 44 extends beyond the connection between the terminal and the female connector 43, and the upper end of the female connector 43 protrudes beyond the potting layer 44; assemble the seal 45; place the base 41 after the potting layer 44 has solidified between the four columns 15, align the side recess 47 of the base 41 with the position of the column 15, and then move the base 41 vertically upward, so that the base 41 presses against the seal 45, the locking teeth 46 engage with the locking block 16, and the second insert 233 is inserted into the female connector 43 to complete the assembly of the fan; if the fan malfunctions later, the base 41 can be directly removed, which means the PCB assembly 4 is disassembled from the fan.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pluggable waterproof fan, characterized in that, It includes a fan base frame, a motor and impeller assembly mounted on one side of the fan base frame, and a PCB assembly detachably mounted on the other side of the fan base frame; The PCB assembly includes a base, a PCBA encapsulated within the base by a potting layer, and a female connector protruding from the PCBA terminal through the potting layer; the base is fastened to the fan base frame, and the base after the potting layer has solidified is installed onto the fan base frame. The motor includes terminals and a wiring assembly that connects to the terminals and penetrates the fan base frame; the wiring assembly is pluggably connected to a female connector. The female connector includes a pipe segment with a wiring hole. The pipe segment has a first end and a second end that are arranged opposite to each other. The width of the wiring hole gradually decreases and then gradually increases from the first end to the second end. The pipe segment has a lateral opening near the second end. A strip-shaped groove is provided in the middle of the pipe section near the second end, and the groove opening extends to below the opening; The wiring assembly includes a first plug-in for connecting to the motor, a second plug-in inserted vertically from the second end into the female connector, and a piece passing through the fan base frame, wherein the piece located between the first plug-in and the fan base frame extends to both sides and bends to form a limiting portion.

2. A pluggable waterproof fan as described in claim 1, characterized in that, The fan base frame has at least three pillars around its edge facing the PCB assembly, and the base sidewall of the PCB assembly has a recess that mates with the pillars.

3. A pluggable waterproof fan as described in claim 2, characterized in that, The outer wall of the column is equipped with a locking block, and the outer wall of the base close to the column is equipped with locking teeth that cooperate with the locking block. The locking teeth engage with the locking block as the PCB assembly moves axially along the bottom frame of the fan.

4. A pluggable waterproof fan as described in claim 1, characterized in that, The PCB assembly also includes a seal, which is an annular rubber pad with a shape consistent with the upper port of the bottom frame, and the annular rubber pad is located between the fan bottom frame and the base.

5. A pluggable waterproof fan as described in claim 1, characterized in that, The fan base frame has an integrally formed central column on the side away from the PCB assembly. The motor is mounted on the outer periphery of the central column. The impeller assembly includes a housing sleeved on the motor, a fan shaft fixedly connected to the housing, a magnetic ring fixed on the inner wall of the housing, and several blades. The fan shaft is inserted into the central column and rotates relative to the fan base frame under the drive of the motor.

6. A pluggable waterproof fan as described in claim 5, characterized in that, A reinforcing magnetic ring is fitted around the outer periphery of the housing.

7. A pluggable waterproof fan as described in claim 1, characterized in that, An insulating base is embedded in the fan frame facing the motor side. A through hole is opened in the center of the insulating base to avoid the central column, and its edge extends towards the motor side to form a retaining edge.

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