TWM658147U - Heat dissipation fan - Google Patents

Abstract

A heat dissipation fan is used to solve the problem that heat energy of conventional fans is not easy to dissipate. It includes: a base; a stator, located on the base; a rotating member, rotatably arranged on the outer periphery of the stator, the rotating member has a wheel hub and a set of connecting rings, the set of connecting rings is connected to the outer periphery of the wheel hub; a blade assembly, combined with the rotating member, the blade assembly has a connecting ring and a plurality of blades connected to each other, the connecting ring is combined with the set of connecting rings, and there is an airflow channel between the connecting ring and the wheel hub; and a cover plate, combined with the blade assembly and shielding the rotating member, the cover plate has a plurality of inlets, and the airflow channel connects the plurality of inlets and a guide outlet. Thereby, it has the effect of good heat dissipation efficiency.

Description

Cooling fan

This invention relates to a heat dissipation fan, and in particular to a heat dissipation fan stator having a better heat dissipation effect.

A known fan may have a fan frame, a stator coil assembly, a rotor assembly and a plurality of blades. The stator coil assembly is coupled to the fan frame, the rotor assembly is rotatably coupled to the outer periphery of the stator coil assembly, and the plurality of blades are coupled to a motor housing of the rotor assembly. The motor housing of the rotor assembly rotates relative to the stator coil assembly to drive the plurality of blades to rotate synchronously, thereby driving the plurality of blades to generate airflow.

However, during the operation of the above-mentioned known fan, the stator coil assembly may generate a large amount of heat due to factors such as excessive power, unbalanced current, increased motor speed or long-term overload operation. Since the stator coil assembly is located inside the motor housing, the heat energy is easily accumulated inside the motor housing and is not easy to dissipate, resulting in reduced motor operating efficiency, thereby affecting the service life of the fan.

In view of this, the conventional fans still need to be improved.

In order to solve the above problems, the purpose of this invention is to provide a heat dissipation fan that can discharge the hot air heated by the operation of the stator to the outside to improve the heat dissipation efficiency.

The second purpose of this invention is to provide a heat dissipation fan that can improve the stability of the rotation of the heat dissipation fan.

Another purpose of this invention is to provide a heat dissipation fan that is easy to assemble.

Another purpose of this invention is to provide a heat dissipation fan that can prevent water from accumulating inside the heat dissipation fan.

The directions or similar terms described in the entire text of this work, such as "front", "back", "left", "right", "upper (top)", "lower (bottom)", "inside", "outside", "side", etc., are mainly for reference to the directions of the attached drawings. Each direction or similar terms are only used to assist in the description and understanding of the various embodiments of this work, and are not used to limit this work.

The quantifiers "one" or "a" used in the components and parts described in this work are only for the convenience of use and to provide the general meaning of the scope of this work; in this work, they should be interpreted as including one or at least one, and the concept of a single number also includes the plural case, unless it is obvious that it means otherwise.

The similar terms such as "combination", "assembly" or "assembly" mentioned in the full text of this work mainly include the connection that can be separated without destroying the components, or the connection that makes the components inseparable, which can be selected by those with general knowledge in this field according to the materials of the components to be connected or the assembly requirements.

The heat dissipation fan of the invention comprises: a base; a stator, located on the base; a rotating member, rotatably arranged on the outer periphery of the stator, the rotating member having a wheel hub and a set of connecting rings, the set of connecting rings being connected to the outer periphery of the wheel hub; a blade assembly, coupled to the rotating member, the blade assembly having a connecting ring and a plurality of blades connected to each other, the connecting ring being coupled to the set of connecting rings, an airflow channel being provided between the connecting ring and the wheel hub; and a cover plate, coupled to the blade assembly and shielding the rotating member, the cover plate having a plurality of inlets, the airflow channel connecting the plurality of inlets and a guide outlet.

Accordingly, the heat dissipation fan of the invention can use the external airflow to enter the airflow channel to take away the hot air generated by the stator and flow out from the outlet; therefore, the hot air heated by the operation of the stator can be discharged to the outside, which can prevent the stator from being damaged due to overheating and prevent the accumulation of high-temperature air from affecting the operation of other parts, thereby improving the heat dissipation efficiency and ensuring the normal operation of the heat dissipation fan.

The connecting ring set may have a plurality of first air guide holes located on the connecting ring set, and the coupling ring may have a plurality of second air guide holes aligned and connected to the first air guide holes, and the second air guide holes and the first air guide holes are connected to the air flow channel. Thus, after the airflow enters the air flow channel, it can pass through the second air guide holes and the first air guide holes, which has the effect of improving the smoothness of air flow.

The total area of the plurality of inlets may be greater than or equal to the total area of the plurality of second air guide holes. In this way, it is possible to ensure that sufficient airflow enters the airflow channel from the plurality of inlets.

The set of connecting rings may have a plurality of positioning holes, and the coupling ring may have a plurality of positioning posts that are aligned with the positioning holes. Thus, when the coupling ring and the set of connecting rings are assembled, the positioning posts can be extended through the positioning holes, so that the coupling ring and the set of connecting rings can be quickly aligned, which is convenient for assembly.

The connecting ring can be formed by connecting a plurality of arc blocks, and each blade is connected to each arc block. In this way, the plurality of arc blocks can be assembled to the connecting ring, which is convenient for assembly.

The set of connecting rings may have several connecting holes, and the coupling ring may have several coupling holes, each of which is located at each of the arc blocks, and each of the coupling holes is aligned with each of the set of connecting holes. In this way, the coupling hole and the set of connecting holes can be locked and coupled by a fixing member, so that the coupling ring can be stably coupled to the set of connecting rings.

The fan blade assembly may have a counterweight structure, which is arranged on the coupling ring. Thus, after the fan blade assembly is manufactured, the possible position of rotational imbalance is detected and a counterweight block is added at a specific position, which has the effect of improving the stability of the rotation of the fan blade assembly.

The counterweight structure may have a first counterweight area and a second counterweight area, and the first counterweight area and the second counterweight area may be arranged at different axial height positions of the coupling ring. In this way, it is possible to ensure that the fan blade assembly has sufficient counterweight space.

The cover plate may have a water retaining wall, which is connected to an inner surface of the cover plate and is located at the outer periphery of the wheel hub. This prevents external water vapor from penetrating into the wheel hub.

The stator may have a coil assembly, and the water retaining wall and the coil assembly may not overlap in the radial direction. In this way, it can be ensured that water will not accumulate in the wheel hub and can be discharged to the outside through the plurality of inlets, which has the effect of preventing water from accumulating inside the cooling fan.

The connecting ring and the wheel hub can be integrally formed. This can enhance the structural strength of the rotating part.

The cover plate may have a plurality of wings connected to an inner surface of the cover plate, the plurality of wings are located opposite to the airflow channel, and the plurality of wings may be located between the plurality of inlets. Thus, the plurality of wings can be used to guide the airflow from the plurality of inlets and guide the airflow to the airflow channel, which has the effect of assisting air intake.

The rotating part may have a plurality of through holes penetrating the wheel hub, and the plurality of through holes are connected to the air flow channel. In this way, the hot air generated by the stator can rise and pass through the plurality of through holes, so that the hot air can be taken away by the external air flow, which has the effect of assisting heat dissipation.

The plurality of through holes may be adjacent to an inclined portion respectively, and each of the inclined portions may have an angle with an inner surface of the cover plate. Thus, when the heat dissipation fan of the invention is inverted, the water in the rotating part can be easily discharged to the outside of the wheel hub through the plurality of through holes, thereby preventing water from accumulating inside the wheel hub.

The base may have a substrate and a plurality of heat sink fins. The plurality of heat sink fins may be located at the periphery of the stator. The plurality of heat sink fins may be connected to the substrate and extend to the outer edge of the substrate. In this way, part of the hot air generated by the stator also flows toward the substrate, so that the hot air and the plurality of heat sink fins can have a larger contact area, which has the effect of improving the heat dissipation effect.

[Original work]

1: Base

11: Substrate

12: Axle tube

13: Heat sink fins

2: Stator

21: Circuit board

22: Coil set

3: Rotating parts

31: wheel hub

311: Board

312: Ring Wall

32: Mounting ring

321: First diversion hole

322: Positioning hole

323: Assembly hole

33: Oblique part

4: Fan blade assembly

41: Binding ring

41a: Wall

41b: flange

411: Second diversion hole

412: Positioning column

413: Binding hole

414: Export

42: Leaves

43: Counterweight structure

431: First weight area

432: Second weight area

5: Cover plate

5a: Inner surface

5b: External surface

51: retaining wall

52: Entryway

53: Wings

F:Fixer

H:Through hole

P: Air flow channel

Q: Arc block

X: axis of rotation

θ: angle of intersection

[Figure 1] An exploded perspective view of a preferred embodiment of this invention.

[Figure 2] An exploded perspective view of the rotating part, fan blade assembly and cover plate of a preferred embodiment of this invention.

[Figure 3] A top view of a cross-section of a preferred embodiment of the present invention.

[Figure 4] Sectional view along line A-A of Figure 3.

[Figure 5] An enlarged view of the local structure of Figure 4B.

[Figure 6] A cross-sectional view of a preferred embodiment of the present invention, in which the model in Figure 4 is flipped 180 degrees.

[Figure 7] An enlarged view of the local structure of Figure 6C.

In order to make the above and other purposes, features and advantages of this creation more clearly understood, the following article specifically cites the preferred implementation examples of this creation and provides detailed descriptions with the attached drawings; in addition, the same symbols in different drawings are considered the same and their descriptions will be omitted.

Please refer to Figure 1, which is a preferred embodiment of the heat dissipation fan of the present invention, comprising a base 1, a stator 2, a rotating member 3, a blade assembly 4 and a cover plate 5. The stator 2 is located on the base 1, the rotating member 3 is rotatably disposed on the outer periphery of the stator 2, the blade assembly 4 is coupled to the rotating member 3, and the cover plate 5 is coupled to the blade assembly 4 and shields the top of the rotating member 3.

Please refer to Figures 1 and 4. The base 1 may have a base plate 11 and a shaft tube 12 connected to each other. The shaft tube 12 is disposed in the base plate 11. The base plate 11 and the shaft tube 12 are preferably integrally formed and connected to increase the structural strength of the base 1. In addition, the base 1 may have a plurality of heat sink fins 13. The plurality of heat sink fins 13 may be located at the periphery of the stator 2. The plurality of heat sink fins 13 are connected to the base plate 11 and extend to the outer edge of the base plate 11. The plurality of heat sink fins 13 may be arranged at intervals.

The stator 2 can be arranged on the outer periphery of the shaft tube 12. The stator 2 can have a circuit board 21 and a coil assembly 22. The circuit board 21 can be combined with the substrate 11. The circuit board 21 and the coil assembly 22 are electrically connected.

As shown in FIGS. 1 and 2, the rotating member 3 has a hub 31, and the central portion of the hub 31 can be combined with a rotating shaft X. Specifically, the hub 31 can have a plate 311 and an annular wall 312, the rotating shaft X is connected to the plate 311, and the annular wall 312 is connected to the periphery of the plate 311. The rotating shaft X can smoothly drive the rotating member 3 to rotate, and the structural composition and appearance of the rotating shaft X are not limited by the invention. Furthermore, the rotating member 3 may have a plurality of through holes H, which may penetrate the wheel hub 31, so that the inside and outside of the wheel hub 31 may be connected through the plurality of through holes H; in this embodiment, the plurality of through holes H may be located at the connection between the ring wall 312 and the plate body 311.

Please refer to Figures 2 and 3. The rotating member 3 has a set of connecting rings 32. The connecting rings 32 are connected to the outer periphery of the wheel hub 31. The connecting rings 32 and the wheel hub 31 can be integrally formed to enhance the structural strength of the rotating member 3. In addition, the connecting rings 32 can have a plurality of first air guide holes 321. Each of the first air guide holes 321 can be evenly distributed on the connecting rings 32. Each of the first air guide holes 321 can allow air to flow through. In addition, the connecting rings 32 can have a plurality of positioning holes 322 and a plurality of connecting holes 323. Each of the connecting holes 323 can be located between the first air guide holes 321 and the positioning holes 322.

Please refer to FIGS. 1 , 2 and 4 , the fan blade assembly 4 has a coupling ring 41 and a plurality of blades 42 . The coupling ring 41 is coupled to the assembly ring 32 of the rotating member 3 . The coupling ring 41 may be located at the outer periphery of the wheel hub 31 . In detail, the coupling ring 41 may have a wall portion 41a and a flange 41b, the flange 41b is connected to the wall portion 41a and extends toward the wheel hub 31, the coupling ring 41 is coupled to the assembly ring 32 of the rotating member 3 by the flange 41b, an airflow channel P is provided between the wall portion 41a of the coupling ring 41 and the wheel hub 31, the airflow channel P is connected to the plurality of through holes H, the plurality of blades 42 are located on the outer periphery of the coupling ring 41, and the plurality of blades 42 may be connected to the wall portion 41a. The coupling ring 41 can be formed by connecting a plurality of arc blocks Q, and each blade 42 is connected to each arc block Q respectively; thus, the coupling ring 41 can be assembled to the connecting ring 32 through the plurality of arc blocks Q, which facilitates assembly.

Please refer to FIGS. 2, 3, and 4. Specifically, the coupling ring 41 may have a plurality of second air guide holes 411, each of which may be located at the flange 41b, each of which may be located at each of the arc blocks Q, each of which may be aligned and connected to each of the first air guide holes 321, and each of which may be connected to the airflow channel P with each of the second air guide holes 411 and the first air guide holes 321. Thus, after the airflow enters the airflow channel P, it may pass through the second air guide holes 411 and the first air guide holes 321. The coupling ring 41 may have a plurality of positioning posts 412, each of which may be located on the flange 41b, each of which may be located on each of the arc blocks Q, and each of which may be aligned with each of the positioning holes 322; thus, when assembling the coupling ring 41 and the set of connecting rings 32, each of the positioning posts 412 may be extended through each of the positioning holes 322, thereby enabling the coupling ring 41 and the set of connecting rings 32 to be quickly aligned.

Furthermore, the coupling ring 41 may have a plurality of coupling holes 413, each of which may be located at the flange 41b, each of which may be located at each of the arc blocks Q, each of which may be aligned with each of the assembly holes 323, and the coupling holes 413 and the assembly holes 323 may be locked and combined by a fixing member F, so that the coupling ring 41 may be stably combined with the assembly ring 32 of the rotating member 3. In addition, the coupling ring 41 may have a guide port 414, which may be closer to the substrate 11 than the plurality of second guide ports 411, and the guide port 414 may be connected to the airflow channel P.

Please refer to Figures 2 and 4. It is also explained that the fan blade assembly 4 may have a counterweight structure 43, which may be disposed on the coupling ring 41. The counterweight structure 43 has a first counterweight area 431 and a second counterweight area 432. The first counterweight area 431 and the second counterweight area 432 are disposed at different axial height positions of the coupling ring 41. The first counterweight area 431 and the second counterweight area 432 may be formed by grooves. Any position of the first counterweight area 431 and the second counterweight area 432 may be provided for counterweight blocks (not shown). In this way, after the fan blade assembly 4 is manufactured, the possible position of the rotational imbalance is detected and a counterweight block is added at a specific position of the first counterweight area 431 or the second counterweight area 432, so that the weight of the fan blade assembly 4 can be averaged, and the center of gravity of the fan blade assembly 4 can be kept on the rotation axis X, so as to improve the rotational stability of the fan blade assembly 4.

As shown in FIGS. 1, 2, and 4, the cover plate 5 is detachably coupled to the coupling ring 41 of the fan blade assembly 4. The cover plate 5 may have an inner surface 5a and an outer surface 5b, wherein the inner surface 5a is closer to the stator 2 than the outer surface 5b. The cover plate 5 may have a water retaining wall 51, which may be connected to the inner surface 5a. The water retaining wall 51 may be formed in a ring shape and located at the outer periphery of the wheel hub 31. The water retaining wall 51 may prevent external moisture from penetrating into the interior of the wheel hub 31. Furthermore, the cover plate 5 may have a plurality of inlets 52, which may penetrate the inner surface 5a and the outer surface 5b of the cover plate 5, and the plurality of inlets 52 may be aligned to connect the airflow channel P, and the airflow channel P may be located between the plurality of inlets 52 and the guide port 414. The total area of the plurality of inlets 52 may preferably be greater than or equal to the total area of the plurality of second guide holes 411, so as to ensure that sufficient airflow can enter the airflow channel P from the plurality of inlets 52.

Please refer to Figures 2 and 4. The cover plate 5 may have a plurality of wings 53. The plurality of wings 53 may be connected to the inner surface 5a of the cover plate 5. The plurality of wings 53 may be located opposite to the airflow channel P. The plurality of wings 53 may be located between the plurality of inlets 52. The plurality of wings 53 may be used to guide the airflow from the plurality of inlets 52 and guide the airflow to the airflow channel P, which may have the function of assisting air intake.

Please refer to Figures 5, 6, and 7. In addition, the plurality of through holes H may be adjacent to an inclined portion 33, respectively. Each inclined portion 33 may have an angle θ with the inner surface 5a of the cover plate 5, and each angle θ may be 15 to 60 degrees. Thus, when the heat dissipation fan of the invention is inverted as shown in Figure 6, that is, when the heat dissipation fan is turned 180 degrees from the mode of Figure 4, the water in the rotating member 3 can be easily discharged from the plurality of through holes H to the outside of the wheel hub 31. Preferably, the water retaining wall 51 and the coil assembly 22 may not overlap in the radial direction (as shown in FIG. 7 ) to ensure that water does not accumulate in the wheel hub 31 and can be discharged to the outside through the plurality of inlets 52 , thereby avoiding water accumulation inside the cooling fan.

Please refer to Figures 2, 3, and 4. When the heat dissipation fan of the present invention is in operation, the coil assembly 22 and the circuit board 21 of the stator 2 are the hotter parts of the stator 2. The hot air generated by the stator 2 adheres to the hub 31 of the rotating member 3, and part of the hot air can rise and pass through the plurality of through holes H as shown in Figure 4. At this time, the fan blade assembly 4 is driven to rotate by the rotating member 3, and the external air flow can pass through the plurality of through holes H. The inlet 52 enters the airflow channel P and takes away the hot air attached to the wheel hub 31 and the hot air passing through the plurality of through holes H, so that the hot air can pass through the second air guide holes 411 and the first air guide holes 321 in sequence, and then flow out through the outlet 414; therefore, the hot air heated by the operation of the stator 2 can be discharged to the outside, which can prevent the stator 2 from being damaged due to overheating, and can achieve good heat dissipation efficiency. In addition, part of the heat generated by the stator 2 is also transferred to the substrate 11. By setting the plurality of heat dissipation fins 13, the heat transferred to the substrate 11 can have a larger contact area with the plurality of heat dissipation fins 13, which can further enhance the heat dissipation effect.

In summary, the heat dissipation fan of the invention can use the external airflow to enter the airflow channel to take away the hot air generated by the stator and flow out from the outlet; therefore, the hot air heated by the operation of the stator can be discharged to the outside, which can prevent the stator from being damaged due to overheating and prevent the accumulation of high-temperature air from affecting the operation of other parts, thereby improving the heat dissipation efficiency and ensuring the normal operation of the heat dissipation fan.

Although this creation has been disclosed using the above preferred embodiments, they are not intended to limit this creation. Any person skilled in the art can make various changes and modifications to the above embodiments within the spirit and scope of this creation, and they are still within the technical scope protected by this creation. Therefore, the protection scope of this creation should include all changes within the meaning and equivalent scope recorded in the attached patent application scope.

1: Base

11: Substrate

12: Axle tube

13: Heat sink fins

2: Stator

21: Circuit board

22: Coil set

3: Rotating parts

31: wheel hub

311: Board

312: Ring Wall

32: Mounting ring

321: First diversion hole

323: Assembly hole

33: Oblique part

4: Fan blade assembly

41: Binding ring

41a: Wall

41b: flange

411: Second diversion hole

413: Binding hole

414: Export

42: Leaves

43: Counterweight structure

431: First weight area

432: Second weight area

5: Cover plate

5a: Inner surface

5b: External surface

51: retaining wall

52: Entryway

53: Wings

F:Fixer

H:Through hole

P: Air flow channel

Q: Arc block

X: axis of rotation

Claims (15)

A heat dissipation fan comprises: a base; a stator located on the base; a rotating member rotatably arranged on the outer periphery of the stator, the rotating member having a wheel hub and a set of connecting rings, the set of connecting rings being connected to the outer periphery of the wheel hub; a blade assembly coupled to the rotating member, the blade assembly having a connecting ring and a plurality of blades connected to each other, the connecting ring being coupled to the set of connecting rings, an air flow channel being provided between the connecting ring and the wheel hub; and a cover plate coupled to the blade assembly and shielding the rotating member, the cover plate having a plurality of inlets, the air flow channel connecting the plurality of inlets and a guide outlet. As in claim 1, the heat dissipation fan, wherein the set of connecting rings has a plurality of first air guide holes located on the set of connecting rings, the combining ring has a plurality of second air guide holes aligned and connected to each of the first air guide holes, and each of the second air guide holes and each of the first air guide holes are connected to the air flow channel. As in claim 2, the total area of the plurality of inlets is greater than or equal to the total area of the plurality of second air guide holes. As in claim 1, the heat dissipation fan, wherein the set of connecting rings has a plurality of positioning holes, and the coupling ring has a plurality of positioning posts respectively aligning with each of the positioning holes. As in claim 1, the heat dissipation fan, wherein the coupling ring is formed by connecting a plurality of arc-shaped blocks, and each of the blades is connected to each of the arc-shaped blocks. As in claim 5, the heat dissipation fan, wherein the connecting ring has a plurality of connecting holes, the connecting ring has a plurality of connecting holes, each of the connecting holes is located at each of the arc blocks, and each of the connecting holes is aligned with each of the connecting holes. As in claim 1, the heat dissipation fan, wherein the fan blade assembly has a counterweight structure, and the counterweight structure is disposed on the coupling ring. As in claim 7, the heat dissipation fan, wherein the counterweight structure has a first counterweight area and a second counterweight area, and the first counterweight area and the second counterweight area are arranged at different axial height positions of the coupling ring. As in claim 1, the heat dissipation fan, wherein the cover plate has a water retaining wall, the water retaining wall is connected to an inner surface of the cover plate, and the water retaining wall is located on the outer periphery of the hub. As in claim 9, the heat dissipation fan, wherein the stator has a coil assembly, and the water retaining wall and the coil assembly do not overlap in the radial direction. As in claim 1, the heat dissipation fan, wherein the set of connecting rings and the hub are integrally formed. As in claim 1, the heat dissipation fan, wherein the cover plate has a plurality of wings, the plurality of wings are connected to an inner surface of the cover plate, the plurality of wings are located opposite to the airflow channel, and the plurality of wings are located between the plurality of inlets. As in claim 1, the heat dissipation fan, wherein the rotating member has a plurality of through holes penetrating the hub, and the plurality of through holes are connected to the air flow channel. As in claim 13, the heat dissipation fan, wherein the plurality of through holes are respectively adjacent to an inclined portion, and each of the inclined portions has an angle with an inner surface of the cover plate. As in claim 1, the heat dissipation fan, wherein the base has a substrate and a plurality of heat dissipation fins, the plurality of heat dissipation fins are located on the periphery of the stator, and the plurality of heat dissipation fins are connected to the substrate and extend to the outer edge of the substrate.