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 utility model relates to an air outlet device, in particular to a cooling fan that blows air in different directions and increases the air volume. Background Art

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

[0003] The above-mentioned existing cooling fan can only blow air in a single specified direction. When there are air-cooling requirements in other different directions for the heat dissipation module, another set of cooling fans must be used, or a secondary air outlet is added on 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 air supply direction of the secondary air outlet is perpendicular to the air supply direction of the main air outlet, resulting in only a small amount of air being able to be 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] In view of this, it is indeed necessary to improve the existing cooling fan. Summary of the Utility Model

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

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

[0007] All directional terms or their approximate terms described throughout the text of the utility model, such as "upper", "lower (bottom)", "inner", "outer", "side", etc., mainly refer to the direction of the attached drawings. Each directional term or its approximate term is only used to assist in explaining and understanding each embodiment of the utility model, and is not used to limit the utility model.

[0008] The quantifier "a" used for the elements and components described throughout the text of the utility model is only for convenience of use and provides the general meaning of the scope of the utility model; in the utility model, it should be interpreted as including one or at least one, and the concept of a single one also includes the case of multiple, unless it clearly means otherwise.

[0009] As used throughout the text of this utility model, approximate terms such as "combination", "assembly" or "connection" mainly include forms such as being separable without damaging the components after connection or being inseparable after connection. Those skilled in the art can choose according to the material of the components to be connected or the assembly requirements.

[0010] The cooling fan of the present utility model includes: a fan frame, a receiving space is formed in a side wall of the fan frame, the receiving space includes a flow channel space, the flow channel space is located in the outer peripheral area of the receiving space, and the flow channel space communicates with the outside of the fan frame through a main air outlet and at least one secondary air outlet respectively; at least one nozzle structure is located at the at least one secondary air outlet, and a channel that gradually tapers from the inside to the outside is formed at each secondary air outlet; and a fan wheel is located in the receiving space, the fan wheel is rotatably arranged on a shaft tube of the fan frame, and a stator is located on the outer periphery of the shaft tube.

[0011] Therefore, for the cooling fan of the present utility model, by adding at least one secondary air outlet in different directions of the main air outlet, air can be sent in different directions. In addition, the nozzle structure is arranged at each secondary air outlet to guide and compress the air flow through the nozzle structure, which can increase the air volume of each secondary air outlet, and has the effect of air-cooling and heat-dissipating in different directions and positions at the same time.

[0012] Among them, the minimum channel height of the outer side of the secondary air outlet is less than or equal to one-half of the maximum channel height of the inner side. In this way, during the process of air being discharged through the secondary air outlet, it can be squeezed to form a jet flow, which has the effect of increasing the air volume.

[0013] Among them, each nozzle structure has a convex portion, and the convex portion is correspondingly combined with a notch on the side wall. In this way, the convex portion and the notch can form a tapered flow channel, which has the effect of guiding and compressing air.

[0014] Among them, each nozzle structure has a convex portion, and the convex portion extends from a notch on the side wall. In this way, the convex portion can limit the notch to form a tapered flow channel, which has the effect of guiding and compressing air.

[0015] Among them, the inner side of the convex portion has a guiding surface, and the guiding surface faces inward towards the inside of the fan frame. In this way, the channels of each secondary air outlet can form a shape with a gradually decreasing cross-sectional area from the inside to the outside along the guiding surface, which has the effect of compressing air to generate a jet flow.

[0016] Among them, each nozzle structure has a plurality of micro-protrusions, the plurality of micro-protrusions are located on the guiding surface of the convex portion, and the plurality of micro-protrusions are arranged at intervals along the edge of the fan frame, and a micro-channel with a gradually decreasing width from the inside to the outside is formed between two adjacent micro-protrusions. In this way, the plurality of micro-protrusions can form a plurality of side-by-side micro-channels at the secondary air outlet, which has the effect of generating several jet flows.

[0017] The minimum width of the microchannel between two adjacent microbumps is preferably less than or equal to the width of each microbump. In this way, the air passing through the multiple microchannels can be squeezed to form a jet flow, which has the effect of increasing the air volume.

[0018] Each micro-bump has a drainage surface, and the drainage surface is formed as an extension surface of the drainage surface of the convex part. In this way, the drainage surface and the drainage 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 by coating injection. Thus, the nozzle structure can be a plastic-coated metal fan frame, which has the effect of taking into account the stability of the fan structure and the adjustability of the air flow channel.

[0020] Wherein, each nozzle structure is integrally formed with the fan frame. Thus, the nozzle structure made of plastic material and the fan frame made of plastic material can be integrally formed, which has the effects of simple manufacturing and saving equipment cost.

[0021] The fan frame has a base and an upper cover covering the base, the side wall extends from the edge of the upper cover toward the base, the shaft tube is vertically arranged on the base, and the shaft tube and the stator are located in the accommodation space. In this way, the base, the upper cover and the side wall can form the accommodation space and the flow channel space for arranging the fan wheel and guiding the airflow, and has the function of inhaling air and pressurizing to generate high-pressure airflow.

[0022] The fan frame has a base and an upper cover covering the base, the side wall extends from the edge of the base toward the upper cover, the shaft tube is vertically arranged on the base, and the shaft tube and the stator are located in the accommodation space. In this way, the base, the upper cover and the side wall can form the accommodation space and the flow channel space for arranging the fan wheel and guiding the airflow, and has the function of inhaling air and pressurizing to generate high-pressure airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 : An exploded perspective view of the first embodiment of the utility model;

[0024] Figure 2 : A top cross-sectional view of the first embodiment of the utility model;

[0025] Figure 3 :along Figure 2 AA line profile of

[0026] Figure 4 : An exploded perspective view of the second embodiment of the utility model;

[0027] Figure 5 :like Figure 3 A partial cross-sectional view of a second embodiment of the utility model shown;

[0028] Figure 6 : Exploded perspective view of the third embodiment of the present utility model;

[0029] Figure 7 : Top view sectional view of the third embodiment of the present utility model;

[0030] Figure 8 : As shown in Figure 7 : Enlarged view of the local structure of area B;

[0031] Figure 9 : Sectional view along the C-C line of Figure 8 ;

[0032] Figure 10 : As shown in Figure 9 : Sectional view of another embodiment;

[0033] Explanation of reference numerals:

[0034] 1: Fan frame

[0035] 11: Base

[0036] 12: Upper cover

[0037] 12a: Side wall

[0038] 12b: Notch

[0039] 13: Shaft tube

[0040] 2: Nozzle structure

[0041] 21: Convex part

[0042] 21a: Flow guiding surface

[0043] 22: Micro bump

[0044] 22a: Drainage surface

[0045] 3: Fan wheel

[0046] V1: Accommodation space

[0047] V2: Flow channel space

[0048] P: Main air outlet

[0049] M: Auxiliary air outlet

[0050] S: Stator

[0051] E: Air inlet

[0052] T: Microchannel. Detailed implementation manners

[0053] To make the above and other objects, features, and advantages of the present utility model more apparent and understandable, the following specifically presents the preferred embodiments of the present utility model and provides detailed descriptions in conjunction with the accompanying drawings; in addition, the same symbols marked in different drawings are regarded as the same, and their descriptions will be omitted.

[0054] Please refer to Figure 1 and Figure 2 As shown, it is the first embodiment of the cooling fan of the present utility model, including 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.

[0055] The fan frame 1 may have a base 11 and an upper cover 12 covering the base 11. The edge of the upper cover 12 vertically extends a side wall 12a towards the base 11. When the upper cover 12 is combined with the base 11, a receiving space V1 can be formed between the base 11, the upper cover 12, and the side wall 12a. And the receiving space V1 includes a flow channel space V2, which is located in the outer peripheral area of the receiving space V1. The fan frame 1 can form a main air outlet P and at least one secondary air outlet M, so that the flow channel space V2 communicates with the outside of the fan frame 1 through the main air outlet P and the at least one secondary air outlet M respectively. Among them, the main air outlet P may be located on a side of the fan frame 1 where the side wall 12a is not provided, and the at least one secondary air outlet M may 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 different directions outward. However, the fan frame 1 may also be changed to vertically extend a side wall 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 utility model is not limited to the above structures and combination methods of the base 11 and the upper cover 12; in addition, the surfaces of the base 11 and the upper cover 12 corresponding to the receiving space V1 may form at least one air inlet E. In this embodiment, a plurality of arc-shaped air inlets E are formed on the base 11 in a spaced-apart and annular arrangement, and the upper cover 12 forms a circular air inlet E. However, the present utility model is not limited to the number and shape of the air inlets E. In addition, the fan frame 1 has a shaft tube 13, the shaft tube 13 is preferably vertically arranged on the base 11, and a stator S is located on the outer periphery of the shaft tube 13. The shaft tube 13 and the stator S are located in the receiving space V1. The directions of the main air outlet P and the at least one secondary air outlet M are preferably in the radial direction or the linear direction perpendicular to the shaft tube 13.

[0056] Please refer to Figure 3 As shown, the at least one nozzle structure 2 is located at the at least one secondary air outlet M, and a channel that gradually tapers from the inside to the outside is formed at each secondary air outlet M, as Figure 3As shown, the minimum channel height of each auxiliary air outlet M on the outside is preferably less than or equal to one-half of the maximum channel height on the inside, so that the channel cross-sectional area of ​​each auxiliary air outlet M increases from the outside to the inside. In this embodiment, a convex portion 21 of the nozzle structure 2 protrudes from the surface of the base 11, and the position of the convex portion 21 corresponds to the notch 12b of the upper cover 12, so that the convex portion 21 is combined with the corresponding notch 12b to form the nozzle structure 2. In addition, a guide surface 21a is formed on the inner side of the convex portion 21, and the guide surface 21a can be an inclined surface or an arc surface extending in an oblique direction, so that the guide surface 21a is inwardly facing the inside of the fan frame 1, and the guide surface 21a is upwardly facing the position of the notch 12b, then the channel of each auxiliary air outlet M can be formed along the guide surface 21a to form a shape that gradually shrinks from the inside to the outside, 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 a jet effect.

[0057] Please refer to Figure 1 and Figure 2 As shown, the impeller 3 is located in the accommodating space V1 between the base 11 and the upper cover 12, and is rotatably disposed on the shaft tube 13. The stator S can drive the impeller 3 to rotate around the shaft tube 13 to axially draw air into the accommodating space V1 through the at least one air inlet E on the base 11 or the upper cover 12 of the fan frame 1, and then the impeller 3 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 auxiliary air outlet M in different directions respectively, thereby forming a multi-directional air supply and air cooling effect.

[0058] Please refer to Figure 4 and Figure 5 As shown in FIG. 1 , it is a second embodiment of the heat dissipation fan of the utility model. This embodiment is substantially the same as the first embodiment described above. In this embodiment, the convex portion 21 of the nozzle structure 2 is formed by extending downward from the notch 12b of the upper cover 12. In addition, the guide surface 21a is formed on the inner side of the convex portion 21, so that the guide surface 21a faces inwardly toward the inside of the fan frame 1, and the guide surface 21a faces downwardly toward the edge of the base 11, so that the channel of each auxiliary air outlet M can form a shape that gradually contracts from the inside to the outside.

[0059] Please refer to Figures 6 - 9 As shown, it is the third embodiment of the heat dissipation fan of the utility model. This embodiment is roughly the same as the first embodiment mentioned above. In this embodiment, the nozzle structure 2 further has a plurality of micro-bumps 22. The plurality of micro-bumps 22 can be located on the guide surface 21a on the inner side of the convex portion 21, and the plurality of micro-bumps 22 are arranged at intervals along the edge of the fan frame 1, so that a micro-channel T with a width gradually decreasing from the inside to the outside is formed between two adjacent micro-bumps 22. Among them, the minimum width of each micro-channel T is preferably less than or equal to the width of each micro-bump 22. In addition, as Figure 9As shown, each micro bump 22 may have a drainage surface 22a, which is preferably an extension surface of the diversion surface 21a of the convex portion 21, so that the drainage surface 22a and the diversion surface 21a can form a continuous windward surface, which has the effect of improving the air flow guiding effect.

[0060] Please refer to again Figure 6 and Figure 7 As shown, two notches 12b are formed on the side wall 12a of this embodiment, corresponding to two secondary air outlets M in different air supply directions respectively. The air supply direction of one secondary air outlet M is opposite to the air supply direction of the main air outlet P, and the air supply direction of the other secondary air outlet M is perpendicular to the air outlet direction of the main air outlet P, which has the function of air-cooling by supplying air in three different directions at the same time. However, the present invention is not limited to the number and direction of the secondary air outlets M in this embodiment.

[0061] Please refer to again Figure 7 and Figure 8 As shown, each micro bump 22 of this embodiment may be a triangular structure. The bottom edges of the plurality of micro bumps 22 face outward (outside the fan frame 1), and the two hypotenuses of the plurality of micro bumps 22 face inward (inside the fan frame 1). Adjacent two micro bumps 22 are opposite to each other with one hypotenuse, and the hypotenuse of the other micro bump 22 is opposite to the hypotenuse of the adjacent micro bump 22 on the other side, so that a plurality of side-by-side funnel-shaped microchannels T can be formed at the secondary air outlet M, so that the air flow in the flow channel space V2 can be guided and compressed into several jets at the secondary air outlet M. However, the present invention is not limited to the shape of each micro bump 22 in this embodiment.

[0062] It is worth mentioning that the plurality of micro bumps 22 disclosed in the foregoing third embodiment can also be applied to the convex portion 21 of the nozzle structure 2 formed by extending downward from the upper cover 12 disclosed in the second embodiment, as Figure 10 shown, the diversion surface 21a of the convex portion 21 faces inward toward the inside of the fan frame 1, and the diversion surface 21a faces downward toward the edge of the base 11, and the plurality of micro bumps 22 are located on the diversion surface 21a. Each micro bump 22 is also arranged inward and downward to face the flow channel space V2 located inside for guiding the air flow through.

[0063] In addition, the windward surfaces of the convex portions 21 and the micro bumps 22 facing the flow channel space V2 are preferably formed into smooth surfaces by filleting and the joints are trimmed flush, which can reduce resistance to improve the effect of guiding the jet flow and has the function of increasing the air volume. In addition, the base 11 and the upper cover 12 of the fan frame 1 can be made of metal or plastic materials. Each nozzle structure 2 can be connected to the base 11 made of metal material by overmolding, and then the base 11 is combined with the upper cover 12 made of metal or plastic material. Alternatively, each nozzle structure 2 can also be overmolded on the upper cover 12 made of metal material, and then the upper cover 12 is combined with the base 11 made of metal or plastic material. In addition, each nozzle structure 2 made of plastic material can also be integrally formed with the base 11 or the upper cover 12 made of plastic material. The present invention is not limited thereto.

[0064] In summary, for the cooling fan of the present invention, by adding at least one secondary air outlet in different directions of the main air outlet, air can be sent in different directions. In addition, the nozzle structure is arranged at each secondary air outlet to guide and compress the air flow through the nozzle structure, which can increase the air volume of each secondary air outlet and has the effect of simultaneously performing air-cooling heat dissipation in different directions and positions.

[0065] Although the present invention has been disclosed by the above preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can still make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, which still fall within the technical scope protected by the present invention. Therefore, the protection scope of the present invention should be defined by the claims. In addition, when the above multiple embodiments can be combined, the present invention includes any combined implementation modes.

Claims

1. A heat dissipation fan, characterized in that, Comprising: A fan frame, a receiving space is formed within a side wall of the fan frame, the receiving space includes a flow channel space located in the outer peripheral region of the receiving space, and the flow channel space communicates with the outside of the fan frame through a main air outlet and at least one auxiliary air outlet respectively; At least one nozzle structure located at the at least one auxiliary air outlet, forming a channel that tapers from the inside to the outside at each auxiliary air outlet; And A fan wheel located in the receiving space, the fan wheel is rotatably arranged 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 according to claim 1, wherein The minimum channel height of the auxiliary air outlet near the outside is less than or equal to one-half of the maximum channel height near the inside.

3. The cooling fan according to claim 1, characterized in that, Each nozzle structure has a convex portion, and the convex portion is correspondingly combined with a notch on the side wall.

4. The cooling fan according to claim 1, wherein, Each nozzle structure has a convex portion formed by extending from a notch on the side wall.

5. The cooling fan according to any one of claims 3 or 4, characterized in that The inner side of the convex portion has a guiding surface, and the guiding surface faces inward towards the inside of the fan frame.

6. The cooling fan according to claim 5, wherein Each nozzle structure has a plurality of micro bumps, the plurality of micro bumps are located on the guiding surface of the convex portion, and the plurality of micro bumps are arranged at intervals along the edge of the fan frame, and a micro channel with a width that tapers from the inside to the outside is formed between adjacent two of the micro bumps.

7. The cooling fan according to claim 6, characterized in that, The minimum width of the micro channel between adjacent two of the micro bumps is less than or equal to the width of each micro bump.

8. The cooling fan according to claim 6, wherein Each micro bump has a drainage surface, and the drainage surface is formed as an extension surface of the guiding surface of the convex portion.

9. The cooling fan according to claim 1, wherein Each nozzle structure is connected to the fan frame by overmolding.

10. The cooling fan according to claim 1, wherein, Each nozzle structure is integrally formed with the fan frame.

11. The cooling fan according to claim 1, wherein, The fan frame has a base and an upper cover covering the base, the side wall extends from the edge of the upper cover towards the base, the shaft tube is vertically arranged on the base, and the shaft tube and the stator are located in the receiving space.

12. The cooling fan according to claim 1, wherein, The fan frame has a base and an upper cover covering the base, the side wall extends from the edge of the base towards the upper cover, the shaft tube is vertically arranged on the base, and the shaft tube and the stator are located in the receiving space.

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