Anti-pressure-relief structure for fan

Abstract

A fan pressure relief structure includes: a fan rotor and a fan frame; the fan rotor has a hub and a vertically mounted shaft, the hub extends a plurality of fan blades, and the ends of the fan blades are connected to an outer ring body; a shaft cylinder is vertically mounted inside the fan frame, the fan rotor is pivotally mounted to the shaft cylinder through the shaft center, the outer ring body of the fan rotor and the interior of the fan frame are spaced apart, and corresponding concave and convex structures are provided on the corresponding surfaces of the two to form a pressure relief zone. When the airflow flows through the pressure relief zone, eddies are generated, causing flow obstruction, thereby achieving the effect of pressure relief.

Description

[Technical Field]

[0001] A fan pressure relief structure, particularly a fan pressure relief structure that achieves pressure relief by setting a pressure relief structure on two opposing rotating surfaces with a non-flat surface, so that the airflow forms a vortex and obstructs the flow. [Previous Technology]

[0002] With the rapid development of electronic products towards high performance, high frequency, high speed, and thinness, the heat generated by electronic products is getting higher and higher, which easily leads to instability and affects product reliability and lifespan. Therefore, heat dissipation has become one of the important issues for electronic products, and using fans as heat dissipation devices is a common structural design. Since eddy currents are generated between the multiple blades of a general fan during operation, and these eddy currents can easily reduce the overall fan performance (such as airflow), manufacturers have developed a ring fan to improve this problem. Please refer to Figures 1A and 1B. The conventional ring 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 together they define an accommodating space 12. The aforementioned fan wheel 11 is housed in the accommodating space 12. The shaft cylinder 104 is located at the center of the accommodating space 12 and is pivotally connected to the corresponding fan wheel 11.

[0003] Furthermore, the aforementioned fan wheel 11 has a hub 111 and a plurality of blades 112. The ends of the blades 112 are arranged around the outer periphery of the hub 111, and a ring body 14 is formed on their free ends. The ring body 14 is connected along the free ends of the blades 112 and defines a gap 15 with the inner wall of the frame 10. Therefore, when the fan is running, the aforementioned ring body 14 effectively reduces the eddy current generation between the blades 112, thereby improving fan performance and reducing noise.

[0004] However, although it is known that the 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 operates, it introduces fluid from the inlet side 102 and then guides it out from the outlet side 101. At the same time, the outlet side 101 generates a negative pressure phenomenon, causing some of the outgoing fluid 17 to flow back and out from the aforementioned gap 15, resulting in pressure loss. This pressure loss then interferes with the introduced fluid, generating turbulence, which leads to poor fluid flow and consequently reduces the overall fan performance and increases noise. How to solve the above-mentioned shortcomings of the conventional fan is the direction that the inventor of this case and related manufacturers in this industry urgently want to research and improve. [Summary of the Invention]

[0005] Therefore, in order to effectively solve the above problems, the main objective of the present invention is to provide a method that can improve the internal water return efficiency of the heat exchange plate and increase the stability of the combination between the heat pipe and the heat exchange plate.

[0006] To achieve the above objectives, the present invention provides a fan anti-pressure relief structure, comprising: a fan rotor and a fan frame;

[0007] The fan rotor has a hub and a vertical shaft. A plurality of fan blades extend from the outer edge of the hub, and the ends of the fan blades are connected to an outer ring. The fan frame has an air inlet side and an air outlet side, and a channel is provided between the air outlet side and the air inlet side. A base is provided on the side of the fan frame near the air outlet side, and a shaft is vertically mounted on the base. The base is connected to the fan frame through a plurality of connecting bodies.

[0008] A stator assembly is fitted on the outside of the shaft cylinder, and at least one bearing is provided inside the shaft cylinder. The fan rotor is pivotally connected to the bearing through the shaft. The outer ring of the fan rotor is disposed in the channel of the fan frame, forming a gap flow channel. The outer surface of the outer ring and the inner wall of the fan frame are correspondingly arranged in a concave-convex interlocking manner to form a pressure relief zone. When the airflow flows through the gap flow channel, the pressure relief zone, which is arranged in a concave-convex interlocking manner, can cause the airflow to generate vortices, thereby causing flow obstruction and achieving the effect of pressure relief.

Implementation Method

[0009] The above-mentioned objectives of the present invention and its structural and functional characteristics will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0010] Please refer to Figures 2 and 3, which are perspective exploded and combined sectional views of the first embodiment of the fan anti-pressure relief structure of the present invention. As shown in the figures, the fan anti-pressure relief structure 2 of the present invention includes: a fan rotor 21 and a fan frame 22.

[0011] The fan rotor 21 has a hub 211 and a shaft 212 is vertically arranged in the center of the hub 211. A magnetic element 213 is provided on the inner edge surface of the hub 211. A plurality of fan blades 214 extend from the outer edge of the hub 211, and the ends of the fan blades 214 are connected to an outer ring body 215.

[0012] The fan frame 22 has an air inlet side 221 and an air outlet side 222 at its 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 the side of the fan frame 22 near the air outlet side 222. A shaft cylinder 224 is vertically installed at the center of the base. The outer edge of the base is connected to the inner frame of the fan frame 22 through a plurality of connecting bodies 225. The wall connection, the connecting body 225 can be a stator or a rib, the shaft cylinder 224 is fitted with a certain sub-assembly 226, and the shaft cylinder 224 is provided with at least one bearing 227. The fan rotor 21 is pivotally connected to the bearing 227 through the shaft 212. The outer ring body 215 of the fan rotor 21 is correspondingly disposed in the channel 223 of the fan frame 22 and is spaced apart from the inner wall surface of the fan frame 22, forming a gap flow channel 228 between the two.

[0013] The inner wall of the fan frame 22 and the outer surface of the outer ring 215 are provided with concave and convex structures that are interlaced and correspond to each other in a non-planar manner, thereby forming a pressure relief zone 220 in the gap flow channel 228. When the airflow flows through the gap flow channel 228, the pressure relief zone 220 will cause the airflow to generate vortices on the upper and lower sides of each concave structure, thereby causing flow obstruction and achieving the effect of pressure relief.

[0014] The pressure relief zone 220 can be configured by providing a plurality of discontinuous recesses 220A on the inner surface of the fan frame 22 in the gap channel 228, or by providing a plurality of discontinuous protrusions 220B on the outer surface of the outer ring body 215, or by providing a continuous serrated inner surface of the fan frame 22 in an alternating configuration with a continuous serrated outer surface of the outer ring body 215. The outer surface of the outer ring body 215 is parallel to the inner wall surface of the fan frame 22.

[0015] By setting up the pressure relief zone 220, a non-flat and non-smooth surface is generated in the gap flow channel 228, so that when the airflow enters, eddies and flow resistance are generated and it cannot pass smoothly, thereby achieving the purpose of pressure relief.

[0016] Please refer to Figure 4, which 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, some structures of this embodiment are the same as those of the first embodiment mentioned above, and will not be repeated here. However, the difference between this embodiment and the first embodiment mentioned above is that the diameter of the gap flow channel 228 of the fan frame 22 is formed by gradually narrowing 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 formed by gradually narrowing 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 parallel to the inner wall surface of the fan frame.

[0017] Please refer to Figure 5, which is a combined cross-sectional view of the third embodiment of the fan anti-pressure relief structure of the present invention. As shown in the figure, some structures of this embodiment are the same as those of the aforementioned second embodiment and will not be described again here. However, 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. 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 parallel to the inner wall surface of the fan frame 22.

[0018] The present invention mainly achieves the effect of preventing pressure relief by setting the inner wall surface of the fan frame 22 and the outer surface of the outer ring 215 in a non-flat, irregularly convex and concave manner, so that the gap flow channel 228 formed between them generates flow resistance and eddies, so that when the airflow flows through the gap flow channel 228, it causes flow obstruction. [Simplified Explanation of the Diagram]

[0019] Figure 1A is a schematic diagram of a conventional fan; Figure 1B is a schematic diagram of a conventional fan; Figure 2 is an exploded perspective view of the first embodiment of the fan pressure relief structure of the present invention; Figure 3 is an assembled sectional view of the first embodiment of the fan pressure relief structure of the present invention; Figure 4 is an assembled sectional view of the second embodiment of the fan pressure relief structure of the present invention; Figure 5 is an assembled sectional view of the third embodiment of the fan pressure relief structure of the present invention.

Claims

1. A fan anti-pressure relief structure, comprising: a fan rotor having a hub and a vertically mounted shaft, a plurality of fan blades extending from the outer edge of the hub, and the ends of the fan blades being connected to an outer ring body; and a fan frame having an air inlet side and an air outlet side, with a channel between the air inlet and outlet sides, a base provided on the side of the fan frame near the air outlet side, a shaft cylinder vertically mounted on the base, the base being connected to the fan frame through a plurality of connecting bodies, a set of stators sleeved on the outside of the shaft cylinder, at least one bearing provided inside the shaft cylinder, and the fan rotor being pivotally connected to the bearing through the shaft. The outer ring of the fan rotor is disposed in the channel of the fan frame, and a gap flow channel is formed between the two. The outer surface of the outer ring and the inner wall of the fan frame are provided with corresponding concave and convex structures in a non-planar manner to form a pressure relief zone. The pressure relief zone is configured by a plurality of discontinuous concave parts on the inner wall of the fan frame and a plurality of discontinuous convex parts on the outer surface of the outer ring. When the airflow passes through the pressure relief zone, vortices are generated on the upper and lower sides of each concave structure to obstruct the flow and achieve the effect of pressure relief.

2. The fan anti-pressure relief structure as described in claim 1, wherein the diameter of the gap flow channel of the fan frame is formed by gradually narrowing from the air inlet side to the air outlet side, or the inner wall of the fan frame is inclined, the outer diameter of the outer ring of the fan rotor is formed by gradually narrowing 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 surface of the outer ring is parallel to the inner wall surface of the fan frame.

3. The fan anti-pressure relief structure as described in claim 1, 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 inner wall of the fan frame is inclined, the outer diameter of the outer ring 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 surface of the outer ring is parallel to the inner wall surface of the fan frame.

4. The fan pressure relief structure as described in claim 1, wherein the connection system is a stator blade or rib.

5. A fan anti-pressure relief structure, comprising: a fan rotor having a hub and a vertically mounted shaft, a plurality of fan blades extending from the outer edge of the hub, and the ends of the fan blades being connected to an outer ring; and a fan frame having an air inlet side and an air outlet side, with a channel between the air inlet and outlet sides, a base provided on the side of the fan frame near the air outlet side, a shaft cylinder vertically mounted on the base, the base being connected to the fan frame through a plurality of connectors, a set of stators fitted outside the shaft cylinder, and at least one bearing provided inside the shaft cylinder, the fan rotor being pivotally connected to the bearing through the shaft. The outer ring of the fan rotor is disposed within the channel of the fan frame, forming a gap flow channel between them. The outer surface of the outer ring and the inner wall of the fan frame are provided with corresponding concave and convex structures in a non-planar manner to form a pressure relief zone. The pressure relief zone is configured by the continuous sawtooth pattern of the inner wall of the fan frame and the continuous sawtooth pattern of the outer surface of the outer ring in an alternating configuration. When the airflow passes through the pressure relief zone, vortices are generated on the upper and lower sides of each concave structure, causing flow obstruction and achieving the effect of pressure relief.

6. The fan anti-pressure relief structure as described in claim 5, wherein the diameter of the gap flow channel of the fan frame is formed by gradually narrowing from the air inlet side to the air outlet side, or the inner wall of the fan frame is inclined, the outer diameter of the outer ring of the fan rotor is formed by gradually narrowing 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 surface of the outer ring is parallel to the inner wall surface of the fan frame.

7. The fan anti-pressure relief structure as described in claim 5, 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 inner wall of the fan frame is inclined, the outer diameter of the outer ring 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 surface of the outer ring is parallel to the inner wall surface of the fan frame.

8. The fan pressure relief structure as described in claim 5, wherein the connection system is a stator blade or rib.

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