A micro-fan coil sealing structure, a coil packaging process and a micro-fan

Abstract

The application belongs to the technical field of coil packaging, and particularly relates to a micro-fan coil sealing structure, a coil packaging process and a micro-fan. The micro-fan coil sealing structure comprises a sealing cover body, a plurality of independent sealing cavities for accommodating coils are uniformly and interval arranged along the circumferential direction on one side of the sealing cover body close to the coils; a positioning structure for fixing the coils is arranged in the sealing cavities. The independent sealing cavities are arranged on the sealing structure of the coils to provide independent mounting space and positioning reference. Meanwhile, the positioning structure is arranged in the sealing cavities, so that the radial / circumferential position of the coils in the sealing cavities is more easily limited. When batch assembly is performed, the randomness of'manual visual placement' can be reduced, and the consistency of the coil mounting position is improved. The stable position of the coils means that the relative position of the coils and the rotor magnetic steel / magnetic circuit is more stable, so that the problems of uneven magnetic field, torque fluctuation and the like caused by eccentricity and inclination are reduced. Furthermore, the fan operation is stable, and the probability of abnormal vibration or efficiency fluctuation is reduced.

Description

A micro fan coil sealing structure, coil packaging process, and micro fan Technical Field

[0001] This invention belongs to the field of coil packaging technology, specifically a micro fan coil sealing structure, coil packaging process, and micro fan. Background Technology

[0002] Miniature fans are widely used in the cooling systems of mobile phones, tablets, laptops, and other compact electronic devices. A typical miniature fan consists of a fan base, a stator assembly, and a rotor assembly. The stator assembly contains coils that generate the driving magnetic field. During operation, the coils not only perform electromagnetic conversion but also endure continuous vibration, heat accumulation, and the intrusion of external dust / moisture. Therefore, the protective sealing, assembly positioning, and operational stability of the coil area directly affect the fan's reliability, noise levels, and lifespan.

[0003] Existing installation and protection methods for miniature fan coils typically include, but are not limited to, the following: Exposed installation or partial shielding installation: The coil is directly mounted on the substrate or frame, shielded only by simple insulating sheets, tape, or partial baffles. The coil is in a relatively open environment, lacking shielding and exhibiting poor environmental adaptability. Overall cover / overall potting protection: Some products use an overall cover to cover the coil area, or fix the coil with glue, pot, or encapsulate it (e.g., dispensing, filling, partial sealing) to improve the coil's fixing strength and a certain degree of protection. This method makes later maintenance difficult and limits heat dissipation. Assembly methods relying on manual alignment: During coil assembly, tooling or manual visual alignment is often relied upon. The radial, circumferential, and height positions of the coil are often achieved through "assembly experience + local constraints," lacking a clear geometric positioning reference for each coil group.

[0004] Therefore, in the absence of "independent installation space boundaries and positioning references for each coil" in the existing technology, the coil position is easily affected by assembly tolerances, glue volume fluctuations, and manual alignment errors, resulting in discrete coil assembly deviations in the same batch of products and making it difficult to control assembly consistency. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, this invention proposes a micro fan coil sealing structure, coil packaging process, and micro fan. This invention primarily addresses the problems of inaccurate positioning during manual installation of existing micro fan sealing structures, leading to coil misalignment and resulting in unstable fan operation and noise.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a micro fan coil sealing structure, including a sealing cover covering the coil; one side of the sealing cover is mounted on the fan substrate; a plurality of independent sealing cavities for accommodating the coil are evenly spaced along the circumferential direction on the side of the sealing cover near the coil; and a positioning structure for fixing the coil is provided inside the sealing cavity.

[0007] By setting an independent sealed cavity in the coil's sealing structure, an independent installation space and positioning reference are provided. Simultaneously, a positioning structure within the cavity makes it easier to define the radial / circumferential position of the coil. During batch assembly, this reduces the randomness of "relying on manual visual placement" and improves the consistency of coil installation positions. Furthermore, a more stable coil position means a more stable relative position with the rotor magnet / magnetic circuit, thereby reducing problems such as uneven magnetic field and torque fluctuations caused by eccentricity and tilt. This, in turn, contributes to smoother fan operation, reducing the probability of abnormal vibration or efficiency fluctuations, and also reduces fan noise during operation.

[0008] Preferably, the positioning structure includes a mounting ring and a positioning block; the mounting ring is fixedly embedded on the side of the sealing cover away from the sealing cavity; a telescopic rod is fixedly mounted on the mounting ring; one end of the telescopic rod extends into the interior of the sealing cavity; a positioning block is fixedly mounted on the end of the telescopic rod extending into the sealing cavity; when the telescopic rod is fully extended, the positioning block is placed outside the sealing cavity.

[0009] An extrusion section is provided on the inner side wall of the sealed cavity; the extrusion section is fixedly connected to the sealing cover.

[0010] Preferably, the mounting ring has mounting holes evenly spaced along the circumference; the mounting holes are located at one end of the telescopic rod and communicate with the telescopic rod; an elastic plate is installed in the mounting hole; and a damping hole is formed on the elastic plate.

[0011] Preferably, the side of the extrusion section closest to the telescopic rod has limit grooves evenly spaced along the circumferential direction.

[0012] Preferably, each sealing cavity sidewall on the sealing cover has at least two slots; the slots are located on the outside of the sealing cavity; and the included angle between the two slots is no greater than 90°.

[0013] Preferably, a heat-conducting wire is fixedly embedded inside the extrusion section; the heat-conducting wire is located at the bottom of the limiting groove, and one end of the heat-conducting wire extends to the bottom of the sealed cavity.

[0014] Preferably, a boss is provided at the lower end of the positioning block, and the thickness of the boss is 0.8mm-1.3mm.

[0015] Preferably, a guide rib is provided inside the sealed cavity; a partition is provided on the guide rib to divide the airflow; the partition is located at the slot opening and is biased towards the side where the two slot openings are close to each other.

[0016] Another technical solution provided by the present invention is a coil packaging process, which includes the following steps;

[0017] S1: Positioning preparation: Adjust all telescopic rods to the fully extended state so that each positioning block is located in the assembly space outside the corresponding sealing cavity;

[0018] S2: Heat conduction-current coupling heat dissipation shaping: The shape of the heat conduction wire suspended on one side of the extrusion section is adjusted to S-shape, and the adjacent heat conduction wires are staggered.

[0019] By setting the heat-conducting wire in an S-shape, the surface area within the flow channel is increased to improve heat dissipation efficiency, thereby improving the heat dissipation efficiency of the sealed structure produced by the packaging process.

[0020] S3: Coil through hole mounting and positioning. Align the middle through hole of the coil with the positioning block and insert the positioning block into the middle through hole to achieve the pre-positioning of the horizontal position of the coil relative to the sealing cover.

[0021] S4: Damped controlled press-in: Apply pressing force to the coil along the axial direction of the sealed cavity, causing the coil to retract the telescopic rod and enter the sealed cavity along the axial direction;

[0022] S5: Extrusion Limiting Secondary Fixing: During the process of the coil entering the sealed cavity, the extrusion part of the inner wall of the sealed cavity contacts the outer side of the coil and squeezes and clamps the coil.

[0023] S6: Encapsulation and Fixing Completed: Assemble and fix the mounting side of the sealing cover to the fan base plate to keep the coil stably in each independent sealing cavity, thus completing the coil encapsulation.

[0024] Another technical solution provided by the present invention is a miniature fan that applies the coil sealing structure in the above-mentioned technical solution.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. In this invention, an independent sealing cavity is set on the sealing structure of the coil to provide an independent installation space and positioning reference. At the same time, a positioning structure is set inside the cavity, making it easier to define the radial / circumferential position of the coil within the cavity. During batch assembly, the randomness of "relying on manual visual placement" can be reduced, improving the consistency of coil installation position. Furthermore, the more stable coil position means a more stable relative position with the rotor magnet / magnetic circuit, thereby reducing problems such as uneven magnetic field and torque fluctuations caused by eccentricity and tilt. This, in turn, is conducive to smooth fan operation and reduces the probability of abnormal vibration or efficiency fluctuations. It can also reduce fan noise during operation. The sealing cover covers the outside of the coil, and the coil is in a relatively closed space. Compared with exposed or only partially covered structures, it can reduce the probability of external dust, water vapor, oil mist, etc. entering the coil area, thereby improving the reliability and environmental resistance (anti-pollution, anti-corrosion, and anti-short circuit risk) of the coil and its solder / lead areas.

[0027] 2. In this invention, during coil assembly, the position of the central through-hole of the coil is aligned with the positioning block, allowing the positioning block to pass through the central through-hole of the coil, thus connecting the coil and the positioning block. Since the lower part of the positioning block is connected to the sealing cover via a telescopic rod that can only move vertically, the horizontal position of the coil is fixed after the coil is connected to the positioning block. Because the positioning block is completely outside the sealed cavity when the telescopic rod is fully extended, a relatively spacious area is available when connecting the coil and the positioning block, facilitating the sealing installation of the coil and improving the ease of installation in the packaging process. Simultaneously, the relatively spacious connection facilitates... The coil's position is adjusted to improve its installation accuracy. After connecting the coil to the fixing block, pressing the coil retracts the telescopic rod, allowing the coil to enter the sealed cavity vertically. The compression part inside the sealed cavity then contacts the outer side of the coil, further securing it and ensuring a stable installation within the sealing ring. This tight fit ensures accurate placement of each coil, maintaining coil stability during subsequent use and resulting in a uniform magnetic field. This improves fan operation stability and reduces noise during operation.

[0028] 3. In this invention, during coil assembly, pressing the coil causes the telescopic rod to retract, thereby discharging the internal medium through the damping hole. The damping hole allows the medium to be discharged slowly, thus controlling the retraction speed of the telescopic rod. This facilitates better control of the coil's orientation as it enters the sealed cavity during installation, further improving the coil's installation accuracy and consequently, the installation accuracy of the sealing structure.

[0029] 4. In this invention, since the coil is composed of several strands of wire wound in a certain shape, if the extrusion part is an arc surface structure, the contact between the extrusion part and the coil is a contact between curved surfaces, resulting in a small contact area and thus a small constraint force of the extrusion part on the coil. Therefore, in this solution, several limiting grooves (which can be V-shaped or U-shaped, etc.) are opened on the side of the extrusion part near the coil. During the installation process, the single strand of wire on the coil is clamped into the limiting groove, thereby improving the constraint effect on the coil and thus improving the installation accuracy and stability of the coil.

[0030] Meanwhile, since the coil is formed by winding multiple strands of wire, its shape cannot achieve high dimensional accuracy. To ensure installation stability, if the inner ring of the extrusion section is set to be small, some parts will be tightly compressed; if the inner ring of the extrusion section is set to be large, some parts will be loose. However, the limiting groove set in this solution breaks the integrity of the inner ring of the extrusion section. Therefore, when the coil size is irregular, the side wall of the limiting groove is more easily deformed to one side by extrusion. Thus, better positioning and restriction can be achieved as a whole, making it easier for the sealing ring to adapt to coils with low dimensional accuracy, improving the compatibility of the extrusion section with the coil, and improving the consistency and stability of the product during mass production. Attached Figure Description

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] Figure 1 is a schematic diagram of the first overall structure of the sealing structure in this invention;

[0033] Figure 2 is a schematic diagram of the second overall structure of the sealing structure in this invention;

[0034] Figure 3 is a schematic diagram of the internal structure of the sealing structure in this invention;

[0035] Figure 4 is a schematic diagram of the installation structure of the positioning block and the telescopic rod in this invention;

[0036] Figure 5 is a partial enlarged view of point A in Figure 3 of this invention;

[0037] Figure 6 is a partial enlarged view of point B in Figure 3 of this invention;

[0038] Figure 7 is a schematic diagram of the extrusion section and the heat-conducting wire in this invention;

[0039] Figure 8 is a schematic diagram of the structure of the elastic sheet in this invention;

[0040] Figure 9 is a schematic diagram of the distribution of guide ribs in this invention;

[0041] Figure 10 is a schematic diagram of the sealing structure installed on a miniature fan in this invention;

[0042] In the figure: 1. Sealing cover; 2. Sealing cavity; 3. Positioning structure; 4. Mounting ring; 5. Positioning block; 6. Telescopic rod; 7. Extrusion part; 8. Mounting hole; 9. Elastic sheet; 10. Damping hole; 11. Limiting groove; 12. Groove; 13. Heat-conducting wire; 14. Boss; 15. Guide rib; 16. Separator. Detailed Implementation

[0043] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0044] Example 1:

[0045] As shown in Figures 1 to 3, a micro fan coil sealing structure includes a sealing cover 1 covering the coil; one side of the sealing cover 1 is mounted on a fan substrate; several independent sealing cavities 2 for accommodating the coil are evenly spaced along the circumferential direction on the side of the sealing cover 1 near the coil; a positioning structure 3 for fixing the coil is provided inside the sealing cavity 2.

[0046] During operation, the small size of the coils in miniature fans often leads to non-standard installation positions during the installation of the sealing structure, resulting in coil misalignment. Therefore, this solution incorporates an independent sealing cavity 2 within the coil's sealing structure to provide independent installation space and positioning reference. Simultaneously, a positioning structure 3 within the cavity makes it easier to define the radial / circumferential position of the coil. This reduces the randomness of "manual visual placement" during batch assembly, improving the consistency of coil installation positions. Furthermore, a more stable coil position means a more stable relative position with the rotor magnets / magnetic circuit, reducing problems such as uneven magnetic field and torque fluctuations caused by eccentricity or tilt. This, in turn, promotes smoother fan operation, reducing the probability of abnormal vibration or efficiency fluctuations, and also lowers fan noise during operation.

[0047] The sealing cover 1 covers the outside of the coil, and the coil is in a relatively enclosed space. Compared with the exposed or only partially covered structure, it can reduce the probability of external dust, water vapor, oil mist and other substances entering the coil area, thereby improving the reliability and environmental resistance of the coil and its solder / lead area, as well as its resistance to pollution, corrosion and short circuit risk.

[0048] The embedding connection method mentioned in the technical solution involves one component being completely embedded into another component, forming a stable overall structure. In terms of process, it can be cast as a single piece or bonded into an integral structure later through grooves and holes combined with adhesive, thereby improving the connection strength between the two parts and facilitating production and manufacturing.

[0049] As shown in Figures 3 to 6, the positioning structure 3 includes a mounting ring 4 and a positioning block 5; the mounting ring 4 is fixedly embedded on the side of the sealing cover 1 away from the sealing cavity 2; a telescopic rod 6 is fixedly mounted on the mounting ring 4; one end of the telescopic rod 6 extends into the interior of the sealing cavity 2; the positioning block 5 is fixedly mounted on the end of the telescopic rod 6 that extends into the sealing cavity 2; when the telescopic rod 6 is fully extended, the positioning block 5 is placed outside the sealing cavity 2.

[0050] An extrusion part 7 is provided on the inner side wall of the sealed cavity 2; the extrusion part 7 is fixedly connected to the sealing cover 1.

[0051] During operation, when assembling the coil, the position of the through hole in the middle of the coil is aligned with the positioning block 5, allowing the positioning block 5 to pass through the through hole in the middle of the coil, thus connecting the coil and the positioning block 5. Since the lower part of the positioning block 5 is connected to the sealing cover 1 via a telescopic rod 6 that can only move vertically, the horizontal position of the coil is fixed after the coil is connected to the positioning block 5. Because the positioning block 5 is completely outside the sealing cavity 2 when the telescopic rod 6 is fully extended, there is a relatively wide space when connecting the coil and the positioning block 5, which facilitates the sealing installation of the coil and improves the ease of installation of the packaging process. At the same time, the relatively wide space facilitates the adjustment of the coil position, thus improving the installation accuracy of the coil.

[0052] After connecting the coil to the fixing block, pressing the coil causes the telescopic rod 6 to retract, allowing the coil to enter the sealed cavity 2 vertically. The pressing part 7 inside the sealed cavity 2 then contacts the outer side of the coil, further fixing it in place. This ensures the coil is stably installed inside the sealing ring. This tight fit ensures accurate placement of each coil, maintaining coil stability during subsequent use and resulting in a uniform magnetic field. This improves fan operation stability and reduces noise during operation.

[0053] The telescopic rod 6 involved consists of multiple telescopic rods 6 connected together. It contains a medium inside. When pressed, the medium inside the telescopic rod 6 is discharged. When it needs to be extended, external force is required to pull it out for use.

[0054] Example 2:

[0055] As shown in Figures 5 and 8, mounting holes 8 are evenly spaced along the circumference of the mounting ring 4; the mounting holes 8 are located at one end of the telescopic rod 6 and are connected to the telescopic rod 6; an elastic plate 9 is installed in the mounting hole 8; a damping hole 10 is provided on the elastic plate 9.

[0056] During coil assembly, pressing the coil causes the telescopic rod 6 to retract, allowing the internal medium to be discharged through the damping hole 10. The damping hole enables the medium to be discharged slowly, thus controlling the retraction speed of the telescopic rod 6. This facilitates better control of the coil's orientation as it enters the sealing cavity 2 during installation, further improving the coil's installation accuracy and consequently, the installation accuracy of the sealing structure.

[0057] The elastic sheet 9 can be made of rubber with a thickness selectable between 0.5 and 1.0 times its diameter. If it's too thin, the damping force provided by the damping hole will be too small, resulting in insufficient support; if it's too thick, the damping force will be too large, requiring a large external force for installation, causing the coil to experience significant resistance during installation. The damping hole 10 can be designed as a slit. Due to the elasticity of the rubber material, the slits tend to close tightly. Therefore, when minimal external pressure is applied, the medium inside the telescopic rod 6 will not drain through the slit-shaped damping hole 10, thus maintaining the stability of the telescopic rod 6 and facilitating coil installation. To ensure the damping hole... The function of 10 is to set the elastic plate 9 and the mounting hole 8 to be tightly fitted. Before installation, a slit-shaped damping hole 10 is set on the elastic plate 9, and then the elastic plate 9 is installed into the mounting hole 8. Since it is a tight fit, the slit-shaped damping hole 10 will be tightly closed after installation, thereby improving the support force to meet the installation requirements. At the same time, through this setting, if the installation is not proper, the telescopic rod 6 can be pulled out by external force. At this time, the damping hole 10 can draw air into the telescopic rod 6, thereby realizing the extension function of the telescopic rod 6, avoiding the drawback of the telescopic rod 6 failing after one use, and thus improving the adaptability of the sealing structure.

[0058] Example 3:

[0059] As shown in Figures 3 and 7, the extrusion section 7 has limit grooves 11 evenly spaced along the circumferential direction on the side near the telescopic rod 6.

[0060] During operation, since the coil is composed of several strands of wire wound in a certain shape, if the extrusion part 7 has an arc surface structure, the contact between the extrusion part 7 and the coil is a contact between curved surfaces, resulting in a small contact area and a weak constraint force of the extrusion part 7 on the coil. Therefore, in this solution, several limiting grooves 11, which can be V-shaped or U-shaped, are opened on the side of the extrusion part 7 near the coil. During installation, the single strand of wire on the coil is clamped into the limiting groove 11, thereby improving the constraint effect on the coil and thus improving the installation accuracy and stability of the coil.

[0061] Meanwhile, since the coil is formed by winding multiple strands of wire, its shape cannot achieve high dimensional accuracy. To ensure installation stability, if the inner ring of the extrusion section 7 is set to be small, some parts will be squeezed tightly; if the inner ring of the extrusion section 7 is set to be large, some parts will be loose. However, the limiting groove 11 set in this solution breaks the integrity of the inner ring of the extrusion section 7. Therefore, when the coil size is irregular, the side wall of the limiting groove 11 will be more easily squeezed and deformed to one side. Thus, better positioning and restriction can be achieved as a whole, making it easier for the sealing ring to adapt to coils with low dimensional accuracy, improving the adaptability of the extrusion section 7 to the coil, and improving the consistency and stability of the product during mass production.

[0062] As shown in Figures 3 and 7, a heat-conducting wire 13 is fixedly embedded inside the extrusion section 7; the heat-conducting wire 13 is located at the bottom of the limiting groove 11, and one end of the heat-conducting wire 13 extends to the bottom of the sealing cavity 2.

[0063] During operation, the coil generates heat due to its own wire assembly. Since the sealing structure somewhat affects heat dissipation, this technical solution mitigates this impact by incorporating a heat-conducting wire 13 at the bottom of the limiting groove 11. This wire rapidly transfers heat from the coil to locations further away, improving the heat dissipation performance of the sealing structure. During coil installation, some coil wires are clamped inside the limiting groove 11, causing it to deform and bringing the heat-conducting wire 13 closer to the coil. This further enhances heat conduction efficiency and improves the overall heat dissipation of the sealing structure.

[0064] Example 4:

[0065] As shown in Figures 2 and 9, each sealing cavity 2 on the sealing cover 1 has at least two slots 12 on its side wall; the slots 12 are located on the outside of the sealing cavity 2; and the included angle between the positions of the two slots 12 is no greater than 90°.

[0066] During operation, at least two slots 12 are opened on the side wall of the sealed cavity 2. When the sealing structure is applied to a fan, the rotation of the fan blades will drive the airflow around the sealing structure. This will cause the airflow to enter the interior of the sealing structure from one slot 12 and exit from the other slot 12, thus forming an airflow within the sealing structure. This airflow dissipates the heat generated by the coil within the sealing structure, thereby increasing the heat dissipation performance of the sealing structure. Since there are multiple sets of sealed cavities 2 arranged in a quincunx pattern, in order to avoid mutual interference between the airflow exit and entry of adjacent sealed cavities 2 and to prevent disruption of the airflow trajectory, which would reduce the heat dissipation effect, the included angle between the two slots 12 is set to less than 90° in this solution. This makes the airflow circulation within each sealed cavity 2 independent, thereby improving the stability of its heat dissipation performance.

[0067] As shown in Figure 3, a boss 14 is provided at the lower end of the positioning block 5, and the thickness of the boss 14 is 0.8mm-1.3mm.

[0068] During operation, by setting a boss 14 at the bottom of the positioning block 5, the coil is prevented from sliding down the positioning block 5 when assembling the coil with the positioning block 5. The boss supports the coil, improving its stability and thus enhancing the stability and accuracy of the coil during installation. At the same time, after the positioning block 5 enters the sealed cavity 2 along with the coil, the boss 14 at the bottom supports the coil, creating a gap between the coil and the bottom of the sealed cavity 2. This allows an airflow channel to be formed between the coil and the bottom of the sealed cavity 2. As the external fan blades rotate, the airflow can enter the coil through one of the slots 12, quickly removing heat from the coil and the heat-conducting wire 13. This also allows for the rapid discharge of heat from the sealed structure, thereby improving the heat dissipation performance of the sealed structure.

[0069] Meanwhile, the extrusion part 7 is not set along the depth direction of the sealed cavity 2 during the setting process. The extrusion part 7 is not set at a certain height near the bottom of the sealed cavity 2. At the same time, the heat-conducting wire 13 is set along the depth direction. In this way, when the airflow flows in the channel between the coil and the sealed cavity 2, the heat on the heat-conducting wire 13 can be carried away, thereby realizing efficient heat transfer between heat dissipation structures, forming a coupling effect in heat transfer, and improving the heat dissipation effect.

[0070] As shown in Figure 9, a guide rib 15 is provided inside the sealed cavity 2; a partition 16 for dividing the airflow is provided on the guide rib 15; the partition 16 is located at the slot 12 and is biased towards the side where the two slots 12 are close to each other.

[0071] During operation, in order to improve the regularity of gas flow within the flow channel formed by the coil and the sealed cavity 2 and avoid dead zones in airflow that would cause uneven heat dissipation, guide ribs 15 are provided inside the sealed cavity 2. This makes the airflow within the flow channel more regular and controllable, achieving more uniform heat dissipation. At the same time, a partition 16 is provided at the end of the guide rib 15 to separate the airflow entering from the slot 12. Since the included angle between one side of the two slots 12 is less than 90°, the included angle on the other side is larger. If the airflow is not separated, it is difficult to ensure that the airflow can be distributed in an ideal state. Therefore, the partition 16 is set to be biased towards the side with the smaller included angle. This allows the airflow to be forcibly separated into two streams after entering through the slot 12, with more airflow separated on the side with the larger included angle. This further improves the uniformity of heat dissipation and thus improves the heat dissipation performance of the sealing structure.

[0072] Example 5:

[0073] A coil packaging process includes the following steps;

[0074] S1: Positioning preparation: Adjust all telescopic rods 6 to the fully extended state so that each positioning block 5 is located in the assembly space outside the corresponding sealing cavity 2.

[0075] S2: Heat conduction-current coupling heat dissipation shaping: The shape of the heat conduction wire 13 suspended on one side of the extrusion section 7 is adjusted to S-shape, and the adjacent heat conduction wires 13 are staggered.

[0076] By setting the heat-conducting wire 13 in an S-shape, the surface area in the flow channel is increased to improve the heat dissipation efficiency, thereby improving the heat dissipation efficiency of the sealing structure produced by the packaging process.

[0077] S3: Coil through hole hooking and positioning, align the middle through hole of the coil with the positioning block 5 and insert the positioning block 5 into the middle through hole to achieve the pre-positioning of the horizontal position of the coil relative to the sealing cover 1;

[0078] S4: Damped controlled press-in: Apply pressing force to the coil along the axial direction of the sealed cavity 2, causing the coil to drive the telescopic rod 6 to retract and enter the sealed cavity 2 along the axial direction;

[0079] Among them, the mounting ring 4 has mounting holes 8 that are evenly spaced along the circumference and communicate with the telescopic rod 6. An elastic plate 9 with a damping hole 10 is set in the mounting hole 8 so that when the telescopic rod 6 retracts, the internal medium is slowly discharged through the damping hole 10 to control the retraction speed and control the posture of the coil entering the sealed cavity 2.

[0080] S5: Extrusion Limiting Secondary Fixing: During the process of the coil entering the sealed cavity 2, the extrusion part 7 of the inner wall of the sealed cavity 2 contacts the outer side of the coil and extrudes and clamps the coil.

[0081] The extrusion section 7 has several limiting grooves 11 evenly spaced along the circumferential direction on the side near the coil, so that at least part of the single-strand wire of the coil is clamped in the limiting groove 11 and the circumferential limiting and tolerance compensation positioning of the coil is achieved under the local elastic deformation of the extrusion section 7.

[0082] S6: Encapsulation and Fixing Completed: Assemble and fix the mounting side of the sealing cover 1 to the fan base plate, so that the coil is stably held in each independent sealing cavity 2, and the coil encapsulation is completed.

[0083] Example 6:

[0084] As shown in Figure 10, a miniature fan applies the coil sealing structure in Embodiments 1-4. During installation, it is installed according to the process steps in Embodiment 5 to obtain a more precise coil installation position, thereby improving the stability of the fan blades during operation. At the same time, the fan blades are turbofans, which can provide better centrifugal airflow when they rotate. Combined with the heat dissipation structure in Embodiments 1-4, it can achieve a better heat dissipation effect.

[0085] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A micro fan coil sealing structure, comprising a sealing cover (1) covering the coil; one side of the sealing cover (1) is mounted on a fan substrate; characterized in that: The sealing cover (1) has several independent sealing cavities (2) evenly spaced along the circumferential direction near the coil side, each cavity (2) containing a coil. A positioning structure (3) for fixing the coil is provided inside each sealing cavity (2). The positioning structure (3) includes a mounting ring (4) and a positioning block (5). The mounting ring (4) is fixedly embedded on the side of the sealing cover (1) away from the sealing cavity (2). A telescopic rod (6) is fixedly mounted on the mounting ring (4). One end of the telescopic rod (6) extends into the sealing cavity (2). The positioning block (5) is fixedly mounted on the end of the telescopic rod (6) extending into the sealing cavity (2). When the telescopic rod (6) is fully extended, the positioning block (5) is placed outside the sealing cavity (2). A pressing part (7) is provided on the inner sidewall of the sealing cavity (2). The pressing part (7) is fixedly connected to the sealing cover (1). The mounting ring (4) is provided with mounting holes (8) evenly spaced along the circumferential direction; the mounting holes (8) are located at one end of the telescopic rod (6) and are connected to the telescopic rod (6); an elastic sheet (9) is installed in the mounting hole (8); a damping hole (10) is provided on the elastic sheet (9); a limiting groove (11) is evenly spaced along the circumferential direction on the side of the extrusion part (7) near the telescopic rod (6); at least two slots (12) are provided on the side wall of each sealing cavity (2) on the sealing cover (1); the slots (12) are located on the outside of the sealing cavity (2); and the included angle between the two slots (12) is not greater than 90°; a heat-conducting wire (13) is fixedly embedded in the inner side of the extrusion part (7); the heat-conducting wire (13) is located at the bottom of the limiting groove (11), and one end of the heat-conducting wire (13) extends to the bottom of the sealing cavity (2).

2. The micro fan coil sealing structure according to claim 1, characterized in that: The lower end of the positioning block (5) is provided with a boss (14), and the thickness of the boss (14) is 0.8mm-1.3mm.

3. The micro fan coil sealing structure according to claim 2, characterized in that: The sealed cavity (2) is provided with a guide rib (15); the guide rib (15) is provided with a partition (16) for dividing the airflow; the partition (16) is located at the slot (12) and is biased towards the side where the two slots (12) are close to each other.

4. A coil packaging process, applicable to the coil sealing structure described in any one of claims 1-3, characterized in that: Includes the following steps; S1: External positioning preparation: Adjust all the telescopic rods (6) to their fully extended state, so that each positioning block (5) is located in the assembly space outside the corresponding sealing cavity (2); S2: Heat conduction-flow coupling heat dissipation shaping: Adjust the shape of the heat conduction wire (13) suspended on one side of the extrusion part (7) to an S-shape, and arrange adjacent heat conduction wires (13) in a staggered manner; S3: Coil through hole hanging positioning: Align the middle through hole of the coil with the positioning block (5) and make the coil through hole hang with the positioning block (5) and arrange the positioning block (5) to ... The positioning block (5) is inserted into the central through hole to achieve the horizontal positioning of the coil relative to the sealing cover (1); S4: Damped controlled pressing: Apply pressing force to the coil along the axial direction of the sealing cavity (2) so that the coil drives the telescopic rod (6) to retract and enter the sealing cavity (2) along the axial direction; S5: Extrusion limit secondary fixation: During the process of the coil entering the sealing cavity (2), the extrusion part (7) of the inner wall of the sealing cavity (2) contacts the outer side of the coil and extrudes and clamps the coil; S6: Encapsulation and fixing completed: The sealing cover (1) is assembled and fixed to the fan base plate to keep the coil stably in each independent sealing cavity (2) and the coil encapsulation is completed.

5. A miniature fan, characterized in that: The coil sealing structure described in any one of claims 1-3 is applied.

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