Anti-pressure-relief structure of fan

Abstract

The invention 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 present invention relates to a fan pressure relief prevention structure, and in particular to a fan pressure relief prevention structure which prevents pressure relief by setting the pressure relief prevention structure on two relatively rotating surfaces with uneven surfaces, so that airflow forms vortices and hinders the flow. Background Art

[0002] As electronic products are rapidly developing towards high performance, high frequency, high speed and thinness, the temperature of electronic products is getting higher and higher, which is prone to instability, affecting product reliability and service life. Therefore, heat dissipation has become one of the important issues of electronic products, and using fans as heat dissipation devices is a common structural setting. Since a general fan will generate eddy currents between the multiple blades on it during operation, and this eddy current phenomenon can easily reduce the overall fan performance (such as air volume), so the industry has developed a ring fan to improve this problem. Please refer to Figure 1A , Figure 1B The conventional annular fan 1 includes a frame 10 and a fan wheel 11. The frame 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 defines a receiving space 12 together. The fan wheel 11 is provided in the receiving space 12. The shaft cylinder 104 is arranged at the center of the receiving space 12 and is pivotally connected to the corresponding fan wheel 11.

[0003] In addition, the impeller 11 has a hub 111 and a plurality of blades 112. The ends of the plurality of blades 112 are arranged in a ring on the outer peripheral 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 ends of the plurality of blades 112 and defines a gap 15 relative to the inner wall of the frame body 10. Therefore, when the fan is running, the ring body 14 is used to effectively reduce the generation of eddy currents between the plurality of blades 112, thereby improving fan performance and reducing noise.

[0004] However, although the conventional annular fan 1 can effectively reduce the problem of eddy current generation through the annular body 14, another problem arises. When the annular fan 1 is in operation, the fluid is introduced from the air inlet side 102 and then guided out from the air outlet side 101. The air outlet side 101 will generate a negative pressure phenomenon, so that part of the guided fluid 17 will flow back and flow out from the aforementioned gap 15, causing pressure loss, and then will interfere with the introduced fluid to generate 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 conventional deficiencies is the direction that the inventor of this case and related manufacturers engaged in this industry are eager to study and improve. Summary of the invention

[0005] Therefore, in order to effectively solve the above problems, the main purpose of the present invention is to provide a fan anti-pressure relief structure, which can improve the water return efficiency inside the temperature vaporizer and increase the stability of the combination of the heat pipe and the temperature vaporizer.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a fan pressure relief prevention structure, which is characterized by comprising:

[0007] A fan rotor has a hub and an axis vertically disposed thereon, a plurality of blades extending from the outer edge of the hub, and the ends of the plurality of blades are connected to an outer ring body; and

[0008] A fan frame has an air inlet side and an air outlet side, a channel is formed between the air outlet side and the air inlet side, a base is provided on the side of the fan frame close to the air outlet side, a shaft cylinder is vertically provided on the base, the base is connected to the fan frame through a plurality of connectors, a stator group is sleeved on the outside of the shaft cylinder, at least one bearing is provided inside the shaft cylinder, the fan rotor is pivoted with the bearing through the axis, the outer ring body of the fan rotor is provided in the channel of the fan frame, 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 an anti-pressure relief zone, when the airflow flows through the anti-pressure relief zone, vortex is generated to cause flow obstruction to achieve the effect of anti-pressure relief.

[0009] The fan anti-pressure relief structure, wherein: the diameter of the gap flow channel of the fan frame is formed by gradually shrinking from the air inlet side to the air outlet side, or the annular groove is set at an angle, and the outer diameter of the outer ring body of the fan rotor is formed by gradually shrinking from one end relative to the air inlet side of the fan frame to one end relative to the air outlet side, and the outer edge of the outer ring body and the surface of the annular groove are set parallel to each other.

[0010] The fan anti-pressure relief structure, wherein: the diameter of the gap flow channel of the fan frame is formed by gradually expanding from the air inlet side to the air outlet side, or the annular groove is set at an angle, and the outer diameter of the outer ring body of the fan rotor is formed by gradually expanding from one end relative to the air inlet side of the fan frame to one end relative to the air outlet side, and the outer edge of the outer ring body and the surface of the annular groove are set parallel to each other.

[0011] The fan anti-pressure relief structure, wherein: the anti-pressure relief portion is composed of a plurality of discontinuous concave portions on the inner wall surface of the fan frame and a plurality of discontinuous convex portions on the outer surface of the outer ring body.

[0012] The fan anti-pressure relief structure, wherein: the anti-pressure relief area is formed by the inner wall of the fan frame being in a continuous serrated shape and the outer surface of the outer ring body being in a continuous serrated shape, which are staggered and correspondingly arranged.

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

[0014] The advantage of the present invention is that when the airflow flows through the gap flow channel, the anti-pressure relief area with interlaced concave and convex configurations can cause the airflow to generate vortices to cause flow obstruction and achieve the effect of anti-pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0017] Figure 2 It is a three-dimensional exploded view of the first embodiment of the fan pressure relief prevention structure of the present invention;

[0018] Figure 3 It is a combined cross-sectional view of the first embodiment of the fan pressure relief prevention structure of the present invention;

[0019] Figure 4 It is a combined cross-sectional view of a second embodiment of the fan pressure relief prevention structure of the present invention;

[0020] Figure 5 It is a combined cross-sectional view of the third embodiment of the fan pressure relief prevention structure of the present invention.

[0021] Explanation of the reference numerals: annular fan 1; frame 10; impeller 11; air outlet side 101; air inlet side 102; shaft cylinder 104; accommodating space 12; hub 111; blades 112; ring body 14; gap 15; fan anti-pressure relief structure 2; fan rotor 21; fan frame 22; hub 211; axis 212; magnetic component 213; blades 214; outer ring body 215; air inlet side 221; air outlet side 222; channel 223; shaft cylinder 224; connector 225; stator assembly 226; bearing 227; gap flow channel 228; anti-pressure relief area 220; recess 220A; convex portion 220B. DETAILED DESCRIPTION

[0022] The above-mentioned objects and the structural and functional characteristics of the present invention will be described based on the preferred embodiments shown in the accompanying drawings.

[0023] See also Figure 2 , Figure 3 As shown, they are respectively a three-dimensional exploded view and a combined cross-sectional view of a first embodiment of a fan pressure relief structure of the present invention. As shown in the figure, the present invention provides a fan pressure relief structure 2, comprising: a fan rotor 21, a fan frame 22;

[0024] The fan rotor 21 has a hub 211 with an axis 212 vertically disposed in the center of the hub 211 . A magnetic component 213 is disposed on the inner edge surface of the hub 211 . A plurality of blades 214 extend from the outer edge of the hub 211 , and the ends of the plurality of blades 214 are connected to an outer ring 215 .

[0025] The fan frame 22 has an air inlet side 221 and an air outlet side 222 at the upper and lower ends, respectively, and a channel 223 is provided between the air inlet side 221 and the air outlet side 222. The channel 223 connects the air inlet side 221 and the air outlet side 222. A base is provided on one side of the fan frame 22 close to the air outlet side 222. A shaft cylinder 224 is vertically provided at the center of the base. The outer edge of the base is connected to the inner frame wall of the fan frame 22 through a plurality of connectors 225. The multiple connecting bodies 225 can be stationary blades or ribs. A stator group 226 is sleeved on the outside of the shaft cylinder 224, and at least one bearing 227 is provided inside the shaft cylinder 224. The fan rotor 21 is pivoted with the bearing 227 through the axis 212. The outer ring body 215 of the fan rotor 21 is correspondingly arranged in the channel 223 of the fan frame 22, and is spaced from the inner wall surface of the fan frame 22, and a gap flow channel 228 is formed between the two.

[0026] The inner wall surface of the fan frame 22 and the outer surface of the outer ring body 215 are both non-planar and have concave-convex structures that are arranged in an interlaced manner to correspond to each other, thereby forming an anti-pressure relief zone 220 in the gap flow channel 228. When the airflow flows through the gap flow channel 228, the anti-pressure relief zone 220 will cause the airflow to generate vortices to cause flow obstruction and thus achieve the effect of anti-pressure relief.

[0027] The anti-pressure relief area 220 can be provided by providing a plurality of discontinuous concave portions 220A on the inner surface of the fan frame 22 corresponding to the gap flow channel 228, or by providing a plurality of discontinuous convex portions 220B on the outer surface of the outer ring body 215 in a corresponding configuration, or by providing a continuous sawtooth shape on the inner surface of the fan frame 22 and a continuous sawtooth shape on the outer surface of the outer ring body 215 in a staggered configuration. The outer surface of the outer ring body 215 and the inner wall surface of the fan frame 22 are provided in parallel with each other.

[0028] By providing the anti-pressure relief area 220 , a non-flat and non-smooth surface is generated in the gap flow channel 228 , so that eddy currents and flow resistance are generated when the airflow enters and cannot pass smoothly, thereby achieving the purpose of preventing pressure relief.

[0029] See also Figure 4 As shown, it is a combined cross-sectional view of the second embodiment of the fan anti-pressure relief structure of the present invention. As shown in the figure, part of the structure of this embodiment is the same as the aforementioned first embodiment and will not be repeated here, but the difference between this embodiment and the aforementioned first embodiment is that the diameter of the gap flow channel 228 of the fan frame 22 is formed by gradually shrinking the air inlet side 221 toward the air outlet side 222, or the inner wall surface of the fan frame 22 is inclined, and the outer diameter of the outer ring body 215 of the fan rotor 21 is formed by gradually shrinking one end relative to the air inlet side 221 of the fan frame 22 toward one end relative to the air outlet side 222, and the outer edge of the outer ring body 215 is arranged parallel to the inner wall surface of the fan frame.

[0030] See also Figure 5 As shown, it is a combined sectional view of the third embodiment of the fan anti-pressure relief structure of the present invention. As shown in the figure, part of the structure of this embodiment is the same as the aforementioned second embodiment and will not be repeated here, but the difference between this embodiment and the aforementioned first embodiment is that the diameter of the inner wall surface of the fan frame 22 is formed by gradually expanding from the air inlet side 221 to the air outlet side 222, or the inner wall surface of the fan frame 22 is inclined, and the outer diameter of the outer ring body 215 of the fan rotor 21 is formed by gradually expanding from one end relative to the air inlet side 221 of the fan frame 22 to one end relative to the air outlet side 222, and the outer edge of the outer ring body 215 is arranged parallel to the inner wall surface of the fan frame 22.

[0031] The present invention mainly arranges the inner wall surface of the fan frame 22 and the outer surface of the outer ring body 215 to correspond to each other in an uneven concave-convex manner, so that the gap flow channel 228 formed between the two generates flow resistance and vortex, so that when the airflow flows through the gap flow channel 228, flow obstruction is caused to achieve the effect of preventing pressure relief.

Claims

1. A fan anti-pressure relief structure, characterized in that: Include: A fan rotor has a hub and an axis vertically disposed thereon, a plurality of blades extending from the outer edge of the hub, and the ends of the plurality of blades are connected to an outer ring body; and A fan frame has an air inlet side and an air outlet side, a channel is formed between the air outlet side and the air inlet side, a base is provided on the side of the fan frame close to the air outlet side, a shaft cylinder is vertically provided on the base, the base is connected to the fan frame through a plurality of connectors, a stator group is sleeved on the outside of the shaft cylinder, at least one bearing is provided inside the shaft cylinder, the fan rotor is pivoted with the bearing through the axis, the outer ring body of the fan rotor is provided in the channel of the fan frame, 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 an anti-pressure relief zone, when the airflow flows through the anti-pressure relief zone, vortex is generated to cause flow obstruction to achieve the effect of anti-pressure relief.

2. The fan pressure relief structure according to claim 1, characterized in that: The diameter of the gap flow channel of the fan frame is formed by gradually shrinking from the air inlet side to the air outlet side, or the annular groove is set at an angle. The outer diameter of the outer ring body of the fan rotor is formed by gradually shrinking from one end relative to the air inlet side of the fan frame to one end relative to the air outlet side. The outer surface of the outer ring body and the inner wall surface of the annular groove are set parallel to each other.

3. The fan pressure relief prevention structure according to claim 1, characterized in that: The diameter of the gap flow channel of the fan frame is formed by gradually expanding from the air inlet side to the air outlet side, or the annular groove is set at an angle. The outer diameter of the outer ring body of the fan rotor is formed by gradually expanding from one end relative to the air inlet side of the fan frame to one end relative to the air outlet side. The outer surface of the outer ring body and the inner wall surface of the annular groove are set parallel to each other.

4. The fan pressure relief prevention structure according to claim 1, characterized in that: The anti-pressure release portion is composed of a plurality of discontinuous concave portions on the inner wall of the fan frame and a plurality of discontinuous convex portions on the outer surface of the outer ring body.

5. The fan pressure relief prevention structure according to claim 1, characterized in that: The anti-pressure relief area is formed by the inner wall of the fan frame being in a continuous sawtooth shape and the outer surface of the outer ring body being in a continuous sawtooth shape, which is staggered and correspondingly arranged.

6. The fan pressure relief prevention structure according to claim 1, characterized in that: The plurality of connected bodies are stationary blades or ribs.

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