Cooling fan

Abstract

A cooling fan is used for solving the problem that an existing cooling fan is insufficient in air supply towards multiple directions. Comprising a fan frame, one side wall of the fan frame is internally provided with a containing space, the containing space comprises a flow channel space, the flow channel space is located in the peripheral area of the containing space, and the flow channel space is communicated with the outside of the fan frame through a main air outlet and at least one auxiliary air outlet; the at least one nozzle structure is located at the at least one auxiliary air outlet, and a channel which is gradually shrunk from inside to outside is formed in each auxiliary air outlet; and the fan wheel is located in the containing space, the fan wheel is rotatably arranged on a shaft tube of the fan frame, and a stator is located on the periphery of the shaft tube. Therefore, the effects of supplying air in multiple directions and increasing the air volume can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to an air outlet device, in particular, a cooling fan capable of blowing air in different directions and increasing air volume. BACKGROUND

[0002] The conventional cooling fan has a fan wheel rotatably arranged in a housing, the housing forms an air inlet in the axial direction of the fan wheel, and forms an air outlet in the side of the housing perpendicular to the air inlet. When the fan wheel operates, air can be sucked into the housing through the air inlet in the axial direction, and high-pressure air is discharged from the air outlet after being compressed by the fan wheel, thereby having the function of outputting high-pressure air flow in a specific direction.

[0003] The conventional cooling fan can only blow air in a single specified direction. When the cooling module has other air cooling needs in different directions, another set of cooling fans must be used, or a secondary air outlet is added in the side direction of the main air outlet of the existing cooling fan. However, the flow channel in the housing of the existing cooling fan guides the pressurized air to flow in the opening direction of the main air outlet, and the opening direction of the secondary air outlet is different from that of the main air outlet, for example, the blowing direction of the secondary air outlet is perpendicular to the blowing direction of the main air outlet, resulting in only a small amount of air being discharged from the secondary air outlet, and the air cooling effect cannot be achieved in the area in the direction of the secondary air outlet.

[0004] Therefore, the conventional cooling fan still needs to be improved. SUMMARY

[0005] To solve the above problems, the purpose of the present application is to provide a cooling fan that can blow air in multiple directions.

[0006] The second purpose of the present application is to provide a cooling fan that can increase the air volume of the secondary air outlet.

[0007] The directionality or its approximate terms described throughout the present application, such as "up", "down (bottom)", "in", "out", "side", etc., mainly refer to the direction of the drawings. The directionality or its approximate terms are only used to assist in describing and understanding the embodiments of the present application, and are not intended to limit the present application.

[0008] The quantifier "one" is used for the elements and components described throughout the present application, only for the convenience of use and to provide the general meaning of the scope of the present application; in the present application, it should be interpreted as including one or at least one, and the concept of a single one also includes multiple cases, unless it is clear that it means otherwise.

[0009] The terms "combination," "integration," or "assembly" used throughout this invention mainly refer to forms such as those that can be separated without damaging the components after connection, or those that make the components inseparable after connection. These terms can be selected by those skilled in the art based on the material of the components to be connected or the assembly requirements.

[0010] The cooling fan of the present invention includes: a fan frame, wherein a receiving space is formed within a side wall of the fan frame, the receiving space including a flow channel space located in the outer peripheral region of the receiving space, the flow channel space being connected to the outside of the fan frame through a main air outlet and at least one secondary air outlet; at least one nozzle structure located in the at least one secondary air outlet, forming a channel that gradually narrows from the inside to the outside in each secondary air outlet; and a fan wheel located in the receiving space, the fan wheel being rotatably disposed on a shaft tube of the fan frame, and a stator located on the outer periphery of the shaft tube.

[0011] Therefore, the cooling fan of the present invention can deliver air in different directions by adding at least one secondary air outlet in different directions of the main air outlet. In addition, the nozzle structure is provided in each secondary air outlet to guide and compress airflow through the nozzle structure, which can increase the air volume of each secondary air outlet and has the effect of simultaneously cooling different directions and positions.

[0012] Specifically, the minimum channel height on the outer side of this secondary air outlet is less than or equal to half the maximum channel height on the inner side. Thus, as air is expelled through this secondary air outlet, it is compressed to form a jet stream, effectively increasing airflow.

[0013] Each nozzle structure has a protrusion that corresponds to a notch in the sidewall. Thus, the protrusion and the notch together form a tapering flow channel, which guides and compresses air.

[0014] Each nozzle structure has a protrusion that extends from a notch in the sidewall. This protrusion restricts the notch from forming a tapered flow channel, thus guiding and compressing air.

[0015] The inner side of the protrusion has a guide surface that faces inward toward the interior of the fan frame. Thus, the channels of each air outlet can form a shape with a cross-sectional area that gradually decreases from the inside out along the guide surface, effectively compressing air to generate a jet stream.

[0016] Each nozzle structure has multiple micro-protrusions located on the guide surface of the protrusion, and these micro-protrusions are spaced apart along the edge of the fan frame. A microchannel with a gradually narrowing width is formed between adjacent micro-protrusions. Thus, these micro-protrusions can form multiple parallel microchannels at the secondary air outlet, effectively generating several jet streams.

[0017] Preferably, the minimum width of the microchannel between two adjacent microbumps is less than or equal to the width of each microbump. In this way, air can be compressed through multiple microchannels to form a jet stream, which has the effect of increasing airflow.

[0018] Each micro-protrusion has a drainage surface, which is an extension of the guiding surface of the protrusion. In this way, the drainage surface and the guiding surface can form a continuous windward surface, which has the effect of improving the airflow guiding effect.

[0019] Each nozzle structure is connected to the fan frame via a plastic-coated injection system. This allows the nozzle structure to cover a metal fan frame, achieving both fan structural stability and adjustable airflow.

[0020] Each nozzle structure is integrally molded with the fan frame. Thus, the plastic nozzle structure and the plastic fan frame can be integrally molded, resulting in simplified manufacturing and reduced equipment costs.

[0021] The fan frame has a base and a top cover covering the base. A side wall extends from the edge of the top cover toward the base. The shaft tube is vertically mounted on the base, and the shaft tube and the stator are located in the accommodating space. Thus, the base, the top cover, and the side wall can form the accommodating space and the flow channel space, which are used to house the fan wheel and guide the airflow, and have the function of drawing in air and pressurizing it to generate a high-pressure airflow.

[0022] The fan frame has a base and a top cover covering the base. A side wall extends from the edge of the base toward the top cover. A shaft tube is vertically mounted on the base, and the shaft tube and the stator are located in the accommodating space. Thus, the base, the top cover, and the side wall form the accommodating space and the flow channel space, which are used to house the fan wheel and guide airflow, and have the function of drawing in air and pressurizing it to generate high-pressure airflow. Attached Figure Description

[0023] Figure 1 : An exploded perspective view of the first embodiment of the present invention; Figure 2 : Top cross-sectional view of the first embodiment of the present invention; Figure 3 :along Figure 2 AA-line cross-section; Figure 4 : An exploded perspective view of the second embodiment of the present invention; Figure 5 :like Figure 3 The figure shown is a partial cross-sectional view of the second embodiment of the present invention; Figure 6 : An exploded perspective view of the third embodiment of the present invention; Figure 7: Top cross-sectional view of the third embodiment of the present invention; Figure 8 :like Figure 7 A magnified view of the local structure of region B shown; Figure 9 :along Figure 8 CC line cross-section; Figure 10 :like Figure 9 A cross-sectional view of another embodiment is shown.

[0024] Explanation of reference numerals in the attached figures: 1: Sector frame 11: Base 12: Top Cover 12a: Side wall 12b: Gap 13: Shaft tube 2: Nozzle Structure 21: convex part 21a: Guide surface 22: Microbumps 22a: Drainage surface 3: Fan wheel V1: Storage space V2: Flow space P: Main air outlet M: Secondary air outlet S: Stator E: Air Inlet T: Microchannel. Detailed Implementation

[0025] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments of the present invention are described below in conjunction with the accompanying drawings; furthermore, those symbols that are used in different drawings are considered to be the same and their descriptions will be omitted.

[0026] Please refer to Figure 1 and Figure 2 As shown, this is a first embodiment of the cooling fan of the present invention, which includes a fan frame 1, at least one nozzle structure 2 and a fan wheel 3. The at least one nozzle structure 2 is located on the air outlet side of the fan frame 1, and the fan wheel 3 is located inside the fan frame 1.

[0027] The fan frame 1 may have a base 11 and a top cover 12 covering the base 11. The edge of the top cover 12 extends vertically toward the base 11 as a sidewall 12a. When the top cover 12 is combined with the base 11, an accommodating space V1 is formed between the base 11, the top cover 12, and the sidewall 12a. The accommodating space V1 includes a flow channel space V2 located in the outer peripheral region of the accommodating space V1. The fan frame 1 may form a main air outlet P and at least one secondary air outlet M, such that the flow channel space V2 connects to the outside of the fan frame 1 through the main air outlet P and the at least one secondary air outlet M. The main air outlet P may be located on a side of the fan frame 1 where the sidewall 12a is not located. At least one secondary air outlet M can be located at at least one notch 12b on the side wall 12a. The main air outlet P and the at least one secondary air outlet M face outward in different directions. However, the fan frame 1 can also be modified by extending a side wall vertically upward from the base 11, so that the at least one secondary air outlet M is located on the side wall of the base 11. The present invention is not limited to the structure and combination of the base 11 and the top cover 12 described above. In addition, at least one air inlet E can be formed on the surface of the base 11 and the top cover 12 corresponding to the accommodating space V1. In this embodiment, a plurality of arc-shaped air inlets E are formed in a spaced ring on the base 11, and the top cover 12 forms a circular air inlet E. However, the present invention is not limited to the number and shape of the air inlets E. In addition, the fan frame 1 has a shaft tube 13, which is preferably vertically disposed on the base 11, and a stator S located on the outer periphery of the shaft tube 13. The shaft tube 13 and the stator S are located in the accommodating space V1. The direction of the main air outlet P and the at least one secondary air outlet M is preferably radial or a straight direction perpendicular to the shaft tube 13.

[0028] Please refer to again Figure 3 As shown, the at least one nozzle structure 2 is located at the at least one secondary air outlet M, and forms a channel that gradually narrows from the inside to the outside at each secondary air outlet M, such as... Figure 3As shown, the minimum channel height on the outer side of each auxiliary air outlet M is preferably less than or equal to half of the maximum channel height on the inner side, so that the channel cross-sectional area of ​​each auxiliary air outlet M increases from the outside to the inside. In this embodiment, a protrusion 21 of the nozzle structure 2 protrudes from the surface of the base 11, and the position of the protrusion 21 corresponds to the notch 12b of the upper cover 12, so that the protrusion 21 and the corresponding notch 12b form the nozzle structure 2. In addition, a guide surface 21a is formed on the inner side of the protrusion 21. The guide surface 21a can be a slope or an arc surface extending in a diagonal direction, so that the guide surface 21a faces inward toward the interior of the fan frame 1, and the guide surface 21a faces upward toward the position of the notch 12b. Then, the channel of each auxiliary air outlet M can form a shape that gradually narrows from the inside to the outside along the guide surface 21a, which is used to guide the airflow in the flow channel space V2 through each auxiliary air outlet M, and the nozzle structure 2 compresses the air to achieve the jet effect.

[0029] Please refer to Figure 1 and Figure 2 As shown, the fan wheel 3 is located in the accommodating space V1 between the base 11 and the upper cover 12, and is rotatably mounted on the shaft tube 13. The fan wheel 3 can be driven by the stator S to rotate around the shaft tube 13, so that air is axially drawn into the accommodating space V1 through at least one air inlet E on the base 11 or the upper cover 12 of the fan frame 1. The fan wheel 3 then pressurizes the air to generate a high-pressure airflow that flows in the flow channel space V2, so that the airflow can pass through the main air outlet P and the at least one secondary air outlet M in different directions, thus forming a multi-directional air supply and air cooling effect.

[0030] Please refer to Figure 4 and Figure 5 As shown, this is a second embodiment of the cooling fan of the present invention. This embodiment is largely the same as the first embodiment described above. In this embodiment, the protrusion 21 of the nozzle structure 2 extends downward from the notch 12b of the upper cover 12. In addition, the guide surface 21a is formed on the inner side of the protrusion 21, so that the guide surface 21a faces inward toward the interior of the fan frame 1 and downward toward the edge of the base 11, thus forming a shape that gradually tapers from the inside to the outside in the channel of each secondary air outlet M.

[0031] Please refer to Figures 6-9 As shown, this is the third embodiment of the cooling fan of the present invention. This embodiment is largely the same as the first embodiment described above. In this embodiment, the nozzle structure 2 further has a plurality of micro-protrusions 22. These micro-protrusions 22 can be located on the guide surface 21a inside the protrusion 21, and the plurality of micro-protrusions 22 are arranged at intervals along the edge of the fan frame 1, so that a microchannel T with a width gradually decreasing from the inside to the outside is formed between two adjacent micro-protrusions 22. Preferably, the minimum width of each microchannel T is less than or equal to the width of each micro-protrusion 22. In addition, as Figure 9As shown, each micro-protrusion 22 can have a flow-guiding surface 22a, which is preferably an extension of the flow-guiding surface 21a of the protrusion 21, so that the flow-guiding surface 22a and the flow-guiding surface 21a can form a continuous windward surface, which has the effect of improving the airflow guiding effect.

[0032] Please refer to again Figure 6 and Figure 7 As shown, in this embodiment, two notches 12b are formed on the side wall 12a, which correspond to two auxiliary air outlets M with different air supply directions. The air supply direction of one of the auxiliary air outlets M is opposite to that of the main air outlet P, while the air supply direction of the other auxiliary air outlet M is perpendicular to that of the main air outlet P. This has the function of simultaneously supplying air and cooling it in three different directions. However, the present invention is not limited to the number and direction of the auxiliary air outlets M in this embodiment.

[0033] Please refer to again Figure 7 and Figure 8 As shown, each micro-bump 22 in this embodiment can be a triangular structure. The bottom edges of the multiple micro-bumps 22 all face outward (outside the fan frame 1), while the two inclined sides of the multiple micro-bumps 22 face inward (inside the fan frame 1). Two adjacent micro-bumps 22 have one inclined side facing each other, and the other inclined side faces the inclined side of the micro-bump 22 on the other side. This can form multiple parallel funnel-shaped microchannels T in the secondary air outlet M, so that the airflow in the flow channel space V2 can be guided and compressed into several jets in the secondary air outlet M. However, the present invention is not limited to the shape of each micro-bump 22 in this embodiment.

[0034] It is worth mentioning that the plurality of micro-protrusions 22 disclosed in the aforementioned third embodiment can also be applied to the protrusion 21 of the nozzle structure 2 formed by extending downward from the upper cover 12 as disclosed in the second embodiment, such as Figure 10 As shown, the guide surface 21a of the protrusion 21 faces inward toward the interior of the fan frame 1, and the guide surface 21a faces downward toward the edge of the base 11. The plurality of micro protrusions 22 are located on the guide surface 21a, and each micro protrusion 22 is also arranged inward and downward to face the flow channel space V2 located on the inner side, for guiding the airflow through.

[0035] In addition, each protrusion 21 and each micro-protrusion 22 facing the windward side of the flow channel space V2 is preferably formed into a smooth curved surface by rounding the corners and the joints are cut evenly, which can reduce resistance and improve the guiding effect of the jet flow, thus increasing the air volume. In addition, the base 11 and the top cover 12 of the fan frame 1 can be made of metal or plastic. Each nozzle structure 2 can be connected to the metal base 11 by covering the ejection, and then the base 11 is combined with the metal or plastic top cover 12. Alternatively, each nozzle structure 2 can also cover the metal top cover 12 by covering the ejection, and then the top cover 12 is combined with the metal or plastic base 11. In addition, each nozzle structure 2 made of plastic can also be integrally formed with the plastic base 11 or the top cover 12. The present invention is not limited thereto.

[0036] In summary, the cooling fan of the present invention can deliver air in different directions by adding at least one secondary air outlet in different directions of the main air outlet. In addition, the nozzle structure is provided in each secondary air outlet to guide and compress airflow through the nozzle structure, which can increase the air volume of each secondary air outlet and has the effect of simultaneously cooling different directions and positions.

[0037] While the present invention has been disclosed using the preferred embodiments described above, it is not intended to limit the invention. Various modifications and alterations made by those skilled in the art, without departing from the spirit and scope of the invention, are still within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims. Furthermore, when the above-described embodiments can be combined, the present invention includes any combination of embodiments.

Claims

1. A cooling fan, characterized in that, include: A fan frame, wherein a receiving space is formed within one side wall of the fan frame, the receiving space includes a flow channel space located in the outer peripheral area of ​​the receiving space, the flow channel space being connected to the outside of the fan frame through a main air outlet and at least one secondary air outlet. At least one nozzle structure is located at the at least one secondary air outlet, forming a channel that gradually narrows from the inside out at each secondary air outlet; and A fan wheel is located in the accommodating space, the fan wheel is rotatably mounted on a shaft tube of the fan frame, and a stator is located on the outer periphery of the shaft tube.

2. The cooling fan as described in claim 1, characterized in that, The minimum channel height on the outer side of the secondary air outlet is less than or equal to half the maximum channel height on the inner side.

3. The cooling fan as described in claim 1, characterized in that, Each nozzle structure has a protrusion that corresponds to a notch in the sidewall.

4. The cooling fan as described in claim 1, characterized in that, Each nozzle structure has a protrusion that extends from a notch in the sidewall to form the protrusion.

5. The cooling fan as described in any one of claims 3 or 4, characterized in that, The inner side of the protrusion has a flow guide surface that faces inward toward the interior of the fan frame.

6. The cooling fan as described in claim 5, characterized in that, Each nozzle structure has multiple micro-bumps located on the guide surface of the protrusion, and the multiple micro-bumps are arranged at intervals along the edge of the fan frame, forming a microchannel with a width that gradually narrows from the inside to the outside between two adjacent micro-bumps.

7. The cooling fan as described in claim 6, characterized in that, The minimum width of the microchannel between two adjacent microbumps is less than or equal to the width of each microbump.

8. The cooling fan as described in claim 6, characterized in that, Each micro-bump has a drainage surface, which is formed as an extension of the drainage surface of the protrusion.

9. The cooling fan as described in claim 1, characterized in that, Each nozzle structure is connected to the fan frame by encapsulating the ejection.

10. The cooling fan as described in claim 1, characterized in that, Each nozzle structure is integrally formed with the fan frame.

11. The cooling fan as described in claim 1, characterized in that, The fan frame has a base and a cover covering the base. The sidewall extends from the edge of the cover toward the base. The shaft tube is vertically disposed on the base. The shaft tube and the stator are located in the receiving space.

12. The cooling fan as described in claim 1, characterized in that, The fan frame has a base and a cover covering the base. The sidewall extends from the edge of the base toward the cover. The shaft tube is vertically disposed on the base. The shaft tube and the stator are located in the receiving space.

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