This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 202011608914.8 filed in China, P.R.C. on Dec. 30, 2020, the entire contents of which are hereby incorporated by reference.
The present disclosure relates to a blade structure of a heat dissipation device, more particularly to a blade structure with multiple blade angles and a heat dissipation device including the same.
As processing speed and performance of electronic devices such as central processing units increase, the electronic devices generate more heat during operation. The generated heat increases the temperature of the electronic device, and the reliability and performance of the electronic device will decrease if the heat is not efficiently dissipated out. In order to prevent overheating of the electronic device, a heat dissipation device such as a fan is used to efficiently dissipate heat generated by the electronic device. The airflow generated by the heat dissipation fan flows through a heating source for heat exchanging, dissipating the heat and thereby ensuring the desired operation of the electronic device.
A typical heat dissipation fan consists of a hub and several fan blades circumferentially around the hub, and the fan blades are evenly distributed and fixed on the fan hub along the circumferential direction thereof. During the operation of the heat dissipation fan, the fan blades are rotated by the fan hub so as to create an airflow from the ambient air, and the airflow theoretically goes in a direction parallel to the rotation axis of the fan. However, during the actual operation, the airflow that flows through the channels among the fan blades will be guided to flow in a direction not parallel to the rotation axis due to the shape of the fan blades, becoming relatively turbulent, such that the airflow easily becomes vortex shedding after crossing the fan blades. The generation of the vortex shedding will reduce the volume of air moved by the fan, resulting in a reduced volume of cooling air and thereby decreasing heat dissipation efficiency, meanwhile, accompanying with noise and vibration problems. As the speed of the heat dissipation fan increases, the vortex shedding, noise, and vibration become more obvious in the area closer to the outer side of the fan blades. Also, the speed of the fan has its limit. If the speed of the fan is too high, the lifespan of the fan will be shortened, thus increasing speed is not a practical solution to the above problems.
Accordingly, how to increase the air volume and avoid introducing turbulence without changing increasing speed is a problem needed to be solved, thus it is desirable to develop a blade structure that can overcome the abovementioned problems.
The present disclosure provides a blade structure with multiple blade angles in order to solve the abovementioned technical problems.
According to one aspect of the present disclosure, a blade structure with multiple blade angles includes:
The blade structure consisting of a plurality of blades with different blade angles.
In the abovementioned blade structure, the blade angles of the plurality of blades decrease from an inner side to an outer side of the blade structure along a longitudinal direction of the blade structure.
In the abovementioned blade structure, the plurality of blades have top portions that are located on the same surface.
In the abovementioned blade structure, the plurality of blades are integrally formed in one piece.
In the abovementioned blade structure, a joint between the plurality of blades with the different blade angles has a smooth part.
According to another aspect of the present disclosure, a heat dissipation device includes:
A hub; and
A plurality of blade structures that are evenly mounted (equally spaced around) on the hub and consist of a plurality of blades with different blade angles.
In the abovementioned heat dissipation device, the blade angles of the plurality of blades decrease from inner sides to outer sides of the plurality of blade structures along longitudinal directions of the plurality of blade structures.
In the abovementioned heat dissipation device, the plurality of blades of each of the plurality of blade structures are integrally formed in one piece.
In the abovementioned heat dissipation device, a joint between the plurality of blades with the different blade angles has a smooth part.
In the abovementioned heat dissipation device, the abovementioned heat dissipation device further includes an outer frame, and the plurality of blades located at outermost sides of the plurality of blade structures are connected to the outer frame.
In the abovementioned heat dissipation device, the hub and the plurality of blade structures are integrally formed in one piece, or the hub, the plurality of blade structures, and the outer frame are integrally formed in one piece.
According to the blade structure with multiple blade angles and the heat dissipation device discussed above, through the design that the blade structure is a set of the blades with different blade angles, the blade structures can guide air flow in a way of multiple angles, multiple directions, and multiple gradations while rotating, reducing the air shedding occurred on the blade surfaces, suppressing backflow on the blade surfaces that flows in the opposite direction to the main air flows, reducing vortex turbulence in the flow field, increasing air volume, improving heat dissipation efficiency, and reducing vortex noise and vibration.
The present disclosure will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only and thus are not intending to limit the present disclosure and wherein:
In order to make the purpose, the technical solutions, and the advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments that are based on the embodiments of the present disclosure and acquired by one skilled in the art without creative work should fall within the scope of the present disclosure.
The exemplary embodiments and the description thereof of the present disclosure are intended to explain the present disclosure rather than to restrict the present disclosure.
In addition, elements/components with the same or similar reference numerals in the accompanying drawing and the embodiments are used to represent the same or similar parts.
The terms about directions used in the specification, such as up, down, left, right, front, back, etc., are only used for describing the directions in the accompanying drawings.
Therefore, these terms are used for easier description rather than restriction on the present disclosure.
The terms used in the specification, such as “include”, “comprise”, “have”, “contain”, etc., are open-ended terms and mean including but not limit to.
The term “and/or” used in the specification includes any one or combination of the components.
The terms “multiple” and “a plurality of” used in the specification include “two” and “two or more”. The term “multiple groups” used in the specification includes “two groups” and “two or more groups”.
Some terms used to describe the present disclosure will be discussed hereinafter or another place in the specification so as to provide one skilled in the art with additional guidance on the description of the present disclosure.
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Note that each blade structure of this embodiment includes the inner blade 210 and the outer blade 220, but the present disclosure is not limited thereto. In some embodiments, each blade structure may include three or more blades of different blade angles.
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As discussed above, the blade structure with different blade angles and the heat dissipation device according to the present disclosure have simple structure, reasonable design, and high practicability. Through the design that the blade structure is a set of the blades with different blade angles, the blade structures can guide air flow in a way of multiple angles, multiple directions, and multiple gradations while rotating, reducing the air shedding occurred on the blade surfaces, suppressing vortex turbulence in the flow field, increasing air volume, improving heat dissipation efficiency, and reducing vortex noise and vibration.
The embodiments are chosen and described in order to best explain the principles of the present disclosure and its practical applications, to thereby enable others skilled in the art best utilize the present disclosure and various embodiments with various modifications as are suited to the particular use being contemplated. It is intended that the scope of the present disclosure is defined by the following claims and their equivalents.
Number | Date | Country | Kind |
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202011608914.8 | Dec 2020 | CN | national |