Anti-pressure-relief structure of fan

Abstract

The utility model provides an anti-pressure-relief structure of a fan. The anti-pressure-relief structure of the fan comprises a fan rotor and a fan frame, the fan rotor is provided with a hub and is vertically provided with an axis, the hub extends to form a plurality of fan blades, and the tail ends of the fan blades are connected with an outer ring body; a shaft barrel is vertically arranged in the fan frame, the fan rotor is pivoted with the shaft barrel through the axis, an outer ring body of the fan rotor and the interior of the fan frame are arranged at an interval, and corresponding concave-convex staggered structures are arranged on the corresponding surfaces of the outer ring body and the fan frame in a non-planar mode to form a pressure relief prevention area. When airflow flows through the anti-pressure-relief area, vortex can be generated to cause flowing obstruction, and the anti-pressure-relief effect is further achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fan anti-pressure relief structure, especially a fan anti-pressure relief structure which forms vortex and hinders flow to achieve anti-pressure relief by setting anti-pressure relief structure on two relative rotating surfaces with non-flat surfaces. BACKGROUND

[0002] With the rapid development of electronic products towards high performance, high frequency, high speed and thin, the heat generation temperature of electronic products is getting higher and higher, thus unstable phenomenon is easily generated, which affects product reliability and service life, therefore heat dissipation has become one of the important problems of electronic products, and using a fan as a heat dissipation device is a common structure. Since the plurality of blades on the fan will generate vortex phenomenon during operation, the vortex phenomenon easily reduces the overall fan performance (such as air volume), so the industry develops a ring fan to improve this problem. Please refer to Figure 1A 、 Figure 1B The conventional ring fan 1 includes a frame body 10 and a fan wheel 11, the frame body 10 has an air outlet side 101, an air inlet side 102 and a shaft cylinder 104, the air outlet side 101 is opposite to the air inlet side 102 and together defines a containing space 12, the containing space 12 contains the aforementioned fan wheel 11, the shaft cylinder 104 is arranged at the center of the containing space 12 and is pivotally arranged with the corresponding fan wheel 11.

[0003] In addition, the aforementioned fan wheel 11 has a hub 111 and a plurality of blades 112, the ends of the plurality of blades 112 are annularly arranged on the outer circumferential side of the hub 111, and a ring body 14 is formed on the free end thereof, the ring body 14 is connected along the free end of the plurality of blades 112 and defines a gap 15 with the inner wall of the frame body 10; therefore, when the fan operates, the ring body 14 effectively reduces the vortex generation between the plurality of blades 112, thereby improving the fan performance and reducing the noise.

[0004] However, although the conventional ring fan 1 can effectively reduce the problem of vortex generation through the ring body 14, another problem is extended, because the ring fan 1 guides fluid from the air inlet side 102 during operation and guides the fluid out of the air outlet side 101 at the same time, the air outlet side 101 will generate negative pressure phenomenon, part of the guided fluid 17 will backflow and flow out from the aforementioned gap 15, causing pressure loss, then interfering with the guided fluid and generating turbulence, so that the fluid flow is not smooth, thereby causing the overall fan performance to decrease and the noise to increase. How to solve the above-mentioned conventional defects is the direction of research and improvement for the utility model person and the related manufacturers in this industry. UTILITY MODEL CONTENTS

[0005] Therefore, in order to effectively solve the above problems, the main purpose of the utility model is to provide a fan pressure relief structure, which can improve the internal water return efficiency of the vapor chamber and increase the stability of the combination of the heat pipe and the vapor chamber.

[0006] In order to achieve the above purpose, the utility model provides a fan pressure relief structure, which is characterized by comprising:

[0007] A fan rotor has a hub and a vertical shaft, the outer edge of the hub extends a plurality of fan blades, and the end of the plurality of fan blades is connected to an outer ring body; and

[0008] A fan frame has an air inlet side and an air outlet side, and a channel is formed between the air outlet side and the air inlet side. One side of the fan frame close to the air outlet side is provided with a base, and a shaft cylinder is vertically arranged on the base. The base is connected to the fan frame through a plurality of connecting bodies. The outer part of the shaft cylinder is provided with a stator set, and the inner part of the shaft cylinder is provided with at least one bearing. The fan rotor is pivotally arranged on the shaft cylinder through the shaft and the bearing. The outer ring body of the fan rotor is arranged in the channel of the fan frame, and a gap flow channel is formed between the outer ring body of the fan rotor and the channel of the fan frame. The outer surface of the outer ring body and the inner wall of the fan frame are provided with corresponding concave-convex staggered structures in a non-planar manner to form a pressure relief area.

[0009] The fan pressure relief structure, wherein: the diameter of the gap flow channel of the fan frame is gradually reduced from the air inlet side to the air outlet side, or the inner wall surface of the fan frame is inclined, the outer diameter of the outer ring body of the fan rotor is gradually reduced from one end of the air inlet side to one end of the air outlet side relative to the fan frame, and the outer surface of the outer ring body and the inner wall surface of the fan frame are arranged in parallel.

[0010] The fan pressure relief structure, wherein: the diameter of the gap flow channel of the fan frame is gradually reduced from the air inlet side to the air outlet side, or the inner wall surface of the fan frame is inclined, the outer diameter of the outer ring body of the fan rotor is gradually reduced from one end of the air inlet side to one end of the air outlet side relative to the fan frame, and the outer surface of the outer ring body and the inner wall surface of the fan frame are arranged in parallel.

[0011] The fan pressure relief structure, wherein: the pressure relief area is composed of a plurality of non-continuous concave parts on the inner wall surface of the fan frame and a plurality of non-continuous convex parts on the outer surface of the outer ring body.

[0012] The fan pressure relief structure, wherein: the pressure relief area is composed of a plurality of non-continuous concave parts on the inner wall surface of the fan frame and a plurality of non-continuous convex parts on the outer surface of the outer ring body.

[0013] The fan pressure relief structure, wherein: the plurality of connecting bodies are vanes or ribs.

[0014] The advantage of this invention is that when the airflow passes through the gap channel, the anti-pressure relief zone, which is arranged in a staggered pattern of concave and convex sections, can cause the airflow to generate vortices, thereby creating flow obstruction and achieving the effect of preventing pressure relief. Attached Figure Description

[0015] Figure 1A This is a schematic diagram of a familiar fan;

[0016] Figure 1B This is a schematic diagram of a familiar fan;

[0017] Figure 2 This is an exploded perspective view of the first embodiment of the fan anti-pressure relief structure of this utility model;

[0018] Figure 3 This is a combined sectional view of the first embodiment of the fan anti-pressure relief structure of this utility model;

[0019] Figure 4 This is a combined sectional view of the second embodiment of the fan anti-pressure relief structure of this utility model;

[0020] Figure 5 This is a combined cross-sectional view of the third embodiment of the fan anti-pressure relief structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Annular fan; 10. Frame; 11. Fan wheel; 101. Air outlet side; 102. Air inlet side; 104. Shaft cylinder; 12. Accommodation space; 111. Hub; 112. Blade; 14. Annular body; 15. Gap; 2. Fan anti-pressure relief structure; 21. Fan rotor; 22. Fan frame; 211. Hub; 212. Shaft; 213. Magnetic assembly; 214. Fan blade; 215. Outer annular body; 221. Air inlet side; 222. Air outlet side; 223. Channel; 224. Shaft cylinder; 225. Connector; 226. Stator assembly; 227. Bearing; 228. Gap flow channel; 220. Anti-pressure relief area; 220A. Recess; 220B. Detailed Implementation

[0022] The above-mentioned objectives of this utility model and its structural and functional characteristics will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0023] Please see Figure 2 , Figure 3 The figures shown are exploded and combined sectional views of the first embodiment of the fan anti-pressure relief structure of this utility model. As shown in the figure, this utility model provides a fan anti-pressure relief structure 2, which includes: a fan rotor 21 and a fan frame 22.

[0024] The fan rotor 21 has a hub 211, and a shaft 212 is vertically arranged in the center of the hub 211. A magnetic assembly 213 is arranged on the inner surface of the hub 211. A plurality of blades 214 are arranged on the outer surface of the hub 211, and an outer ring 215 is connected to the ends of the blades 214.

[0025] The upper and lower ends of the fan frame 22 are respectively provided with an air inlet side 221 and an air outlet side 222. A passage 223 is arranged between the air inlet side 221 and the air outlet side 222. The passage 223 is connected to the air inlet side 221 and the air outlet side 222. A base is arranged on the side of the fan frame 22 close to the air outlet side 222. A shaft cylinder 224 is vertically arranged in the center of the base. The outer surface of the base is connected to the inner wall of the fan frame 22 through a plurality of connecting bodies 225. The connecting bodies 225 can be vanes or ribs. The outer surface of the shaft cylinder 224 is sleeved with a stator assembly 226. The inner surface of the shaft cylinder 224 is provided with at least one bearing 227. The fan rotor 21 is pivotally arranged on the bearing 227 through the shaft 212. The outer ring 215 of the fan rotor 21 is arranged in the passage 223 of the fan frame 22, and is spaced apart from the inner wall of the fan frame 22 to form a gap flow channel 228.

[0026] The inner wall of the fan frame 22 and the outer surface of the outer ring 215 are arranged in a staggered manner with non-planar concave-convex structures. Thus, a pressure relief prevention area 220 is formed in the gap flow channel 228. When the airflow flows through the gap flow channel 228, the pressure relief prevention area 220 causes the airflow to generate vortex flow and flow resistance, thereby achieving the effect of preventing pressure relief.

[0027] The pressure relief prevention area 220 is arranged by arranging a plurality of non-continuous concave portions 220A corresponding to the inner surface of the fan frame 22 in the gap flow channel 228, or by arranging a plurality of non-continuous convex portions 220B corresponding to the outer surface of the outer ring 215, or by arranging the inner surface of the fan frame 22 in a continuous sawtooth shape and arranging the outer surface of the outer ring 215 in a continuous sawtooth shape. The outer surface of the outer ring 215 and the inner wall of the fan frame 22 are arranged in parallel.

[0028] The arrangement of the pressure relief prevention area 220 causes the gap flow channel 228 to have a non-flat and non-smooth surface, which causes the airflow to generate vortex flow and flow resistance when entering, thereby achieving the purpose of preventing pressure relief.

[0029] Please refer to Figure 4As shown in the figure, it is the combined sectional view of the second embodiment of the fan pressure relief structure of the utility model, as shown in the figure, part of the structure of the embodiment is the same as the first embodiment and will not be repeated here, but the difference between the embodiment and the first embodiment is that the diameter of the gap flow passage 228 of the fan frame 22 is tapered from the air inlet side 221 to the air outlet side 222, or the inner wall surface of the fan frame 22 is inclined, the outer diameter of the outer ring body 215 of the fan rotor 21 is gradually tapered from one end of the air inlet side 221 of the fan frame 22 to one end of the air outlet side 222, and the outer edge of the outer ring body 215 is parallel to the inner wall surface of the fan frame.

[0030] Please refer to Figure 5 As shown in the figure, it is the combined sectional view of the third embodiment of the fan pressure relief structure of the utility model, as shown in the figure, part of the structure of the embodiment is the same as the second embodiment and will not be repeated here, but the difference between the embodiment and the first embodiment is that the diameter of the inner wall surface of the fan frame 22 is gradually expanded from the air inlet side 221 to the air outlet side 222, or the inner wall surface of the fan frame 22 is inclined, the outer diameter of the outer ring body 215 of the fan rotor 21 is gradually expanded from one end of the air inlet side 221 of the fan frame 22 to one end of the air outlet side 222, and the outer edge of the outer ring body 215 is parallel to the inner wall surface of the fan frame 22.

[0031] The utility model mainly through the inner wall surface of the fan frame 22 and the outer surface of the outer ring body 215 are corresponding to the concave-convex staggered corresponding arrangement in non-flat way, make the gap flow passage 228 formed between the two flow resistance and vortex, make the airflow flow through the gap flow passage 228, cause flow obstruction and then reach the effect of preventing pressure relief.

Claims

1. A fan pressure relief prevention structure characterized by comprising: The fan rotor has a hub with a plurality of blades extending from the hub to an outer ring body; and The fan frame has an inlet side and an outlet side with a passage therebetween, a base is provided on a side of the fan frame close to the outlet side, a shaft cylinder is vertically provided on the base, the base is connected to the fan frame by a plurality of connecting bodies, the shaft cylinder is externally provided with a stator set, the shaft cylinder is internally provided with at least one bearing, the fan rotor is pivotally provided with the shaft cylinder and the bearing through the shaft, the outer ring body of the fan rotor is arranged in the passage of the fan frame, a gap flow channel is formed between the outer ring body of the fan rotor and the passage of the fan frame, the outer surface of the outer ring body and the inner wall of the fan frame are provided with corresponding concave-convex staggered structures in a non-planar manner to form a pressure leakage prevention zone. The diameter of the gap flow channel of the fan frame is gradually reduced from the inlet side to the outlet side, or the inner wall of the fan frame is provided in an inclined manner, the outer diameter of the outer ring body of the fan rotor is gradually reduced from one end opposite to the inlet side to one end opposite to the outlet side of the fan frame, and the outer surface of the outer ring body and the inner wall of the fan frame are arranged in parallel to each other.

2. The fan pressure relief structure of claim 1, wherein: The diameter of the gap flow channel of the fan frame is gradually increased from the inlet side to the outlet side, or the inner wall of the fan frame is provided in an inclined manner, the outer diameter of the outer ring body of the fan rotor is gradually increased from one end opposite to the inlet side to one end opposite to the outlet side of the fan frame, and the outer surface of the outer ring body and the inner wall of the fan frame are arranged in parallel to each other.

3. The fan pressure relief structure of claim 1, wherein: The pressure leakage prevention zone is formed by a plurality of non-continuous concave portions on the inner wall of the fan frame and a plurality of non-continuous convex portions on the outer surface of the outer ring body.

4. The fan pressure relief structure of claim 1, wherein: The pressure leakage prevention zone is formed by a continuous zigzag on the inner wall of the fan frame and a continuous zigzag on the outer surface of the outer ring body.

5. The fan pressure relief structure of claim 1, wherein: The plurality of connecting bodies are vanes or ribs.

6. The fan pressure relief structure of claim 1, wherein: ​

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