Viscous fluid fan device

Abstract

The viscous fluid fan device comprises a fan shell, a base and a plurality of annular blades. The fan shell is provided with a driving part, an air inlet part, an exhaust part and an internal space, wherein the air inlet part, the exhaust part and the internal space are communicated with one another. The base is arranged on the fan shell and provided with N supporting columns and a rotating axis. N is defined as a positive integer larger than or equal to 5, and the rotating axis is used for the base to be coaxially connected with the driving part and can be driven. The multiple annular blades are arranged on the base in a stacked mode, each annular blade is provided with a plurality of supporting column fixing holes, and the annular blades are arranged on the multiple supporting columns in a penetrating mode. N inter-column included angles are formed among the N supporting columns; the included angles among the N columns are selected from one of all unequal included angles and part unequal included angles, so that the situation that the amplitude of noise is suddenly increased at a specific frequency when the annular blades rotate can be reduced. Therefore, the invention has the advantages of unequal inter-column included angle design, capability of reducing amplitude sudden increase of noise, easiness in implementation, low cost and the like.

Description

Technical Field

[0001] The present invention relates to a viscous fluid fan device, and more particularly to a viscous fluid fan device which can reduce the sudden increase of the amplitude of noise by designing the unequal angles between columns, and is easy to implement and low in cost. Background Art

[0002] There are many designs of existing viscous fluid fans, such as the "Viscous flow blower for thermal management of an electronic device" (originally called "Viscous flow blower for thermal management of an electronic device") published in 2019 in U.S. Patent No. US10503220. Its main principle is that when a number of annular blades (not shown in the drawings of this case) rotate, the fluid (such as air) between two adjacent annular blades is moved outward due to the centrifugal force, forming a gas flow, which can achieve the same cooling effect as a traditional fan, and can be applied to the heat dissipation of electronic devices.

[0003] See also Figures 8 to 10 The conventional viscous fluid fan (e.g., the "fan" (originally FAN) of U.S. Patent No. US10920790) may include a housing 91, a motor 92, a support 93, and a plurality of annular blades 94. The plurality of annular blades 94 are fixed on the support 93, and the support 93 can be driven by the motor 92 to rotate, thereby generating a gas 81 (e.g., Figure 8 As shown in FIG. 1 , the gas 81 can flow outward from the radial position between the plurality of annular blades 94, as shown by the solid arrows. Each of the annular blades 94 has a plurality of circular holes 941, which can be formed by a plurality of annular spacers 95 (such as Fig. 9 As shown, only a few of them are shown for illustration purposes), and a plurality of circular columns 96 are respectively fixed to the support seat 93.

[0004] However, the plurality of circular columns 96 are usually arranged at equal angles on the support 93. Referring to Fig. 10, when the number of the plurality of circular columns 96 is 5, the angle A is equal to 360 / 5 = 72 degrees. Generally speaking, equal angle design is convenient in manufacturing and assembly.

[0005] However, when the plurality of annular blades 94 rotate, the plurality of circular columns 96 arranged at equal angles are equidistant, so the lengths of the suspended portions of the plurality of annular blades 94 are also the same. When the viscous fluid fan is running, noise analysis reveals that at certain frequencies, the amplitude of the noise suddenly increases, and even has a certain regularity (possibly due to resonance). This is a major drawback for product users who have higher noise requirements. Summary of the invention

[0006] The purpose of the present invention is to provide a viscous fluid fan device, which has the advantages of unequal angles between columns to reduce the sudden increase of noise amplitude, and is easy to implement and low cost. In particular, the problem that the present invention is intended to solve is that the circular columns of the existing viscous fluid fan are arranged at equal angles, resulting in a problem that the amplitude of the noise at certain frequencies will suddenly increase when performing noise analysis during rotation.

[0007] The technical means for solving the above problems provides a viscous fluid fan device, which includes: A fan housing having an air inlet portion, an exhaust portion, a driving portion and an inner space; A base is provided corresponding to the fan housing, the base having a body, N support columns, a connecting member and a rotation axis; wherein N is defined as a positive integer greater than or equal to 5, the N support columns extend from the body, the connecting member is coaxial with the rotation axis, and the base is coaxially connected to the driving part, and can be driven to rotate the base; A plurality of annular blades are stacked on the base, the plurality of annular blades are parallel to each other, and each of the plurality of annular blades has a plurality of support column fixing holes, and the plurality of support column fixing holes are used for the corresponding annular blades to pass through the plurality of support columns; and The N support columns are equidistant from the rotation axis respectively, there is an inter-column angle between two adjacent support columns, and there are N inter-column angles between the N support columns; the N inter-column angles are selected from either completely unequal or partially unequal, thereby reducing the sudden increase in the amplitude of noise at a specific frequency when the plurality of annular blades rotate.

[0008] Optionally, any one of the N supporting columns has two parallel sides; and Any one of the plurality of support column fixing holes corresponds to any one of the N support columns and has two fixing edges, and the two fixing edges are used for fixing the corresponding support column fixing hole relative to the two parallel edges of the support column.

[0009] Optionally, the N angles between the columns are all unequal; and the angles between the N columns are in an increasing relationship with equal intervals.

[0010] Optionally, the number of the N inter-column angles is 5; and the 5 inter-column angles are 70 degrees, 71 degrees, 72 degrees, 73 degrees and 74 degrees respectively.

[0011] Optionally, the number of the N inter-column angles is 5; and the 5 inter-column angles are 71 degrees, 71.5 degrees, 72 degrees, 72.5 degrees and 73 degrees, respectively.

[0012] Optionally, the N inter-column angles are 5; the N-1 inter-column angles are randomly generated, and are 70.3 degrees, 72.6 degrees, 72.1 degrees and 71.9 degrees respectively; and the last inter-column angle is 73.1 degrees, and the total angle of the 5 inter-column angles is 360 degrees.

[0013] Optionally, the N inter-column angles are partially unequal; the N inter-column angles are 5; and the 5 inter-column angles are 72 degrees, 72 degrees, 71.3 degrees, 72.2 degrees and 72.5 degrees, respectively.

[0014] The above-mentioned objects and advantages of the present invention can be easily understood from the following detailed description of the selected embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A It is a schematic diagram of the decomposition from a first angle of the present invention.

[0016] Figure 1B It is a schematic diagram of the decomposition from a second angle of the present invention.

[0017] Figure 2 for Figure 1A Schematic diagram of the partial combination.

[0018] Figure 3 for Figure 2 Schematic diagram of the first angle after combination.

[0019] Figure 4 for Figure 2 Schematic diagram of the first angle after combination.

[0020] Figure 5 for Figure 4 Cross-sectional view at position V-V.

[0021] Fig. 6A It is a schematic diagram of the angle distribution of some structures of the present invention.

[0022] Figure 6B for Fig. 6A Schematic diagram of the correspondence of some structures.

[0023] Figure 7 The figure is a graph comparing the noise values ​​of the present invention and the prior art device.

[0024] Figure 8 It is a partial cross-sectional view of an existing device.

[0025] Fig. 9 for Figure 8 Schematic diagram of the correspondence of some structures.

[0026] Fig.10 for Fig. 9Schematic diagram of the angle distribution of some structures.

[0027] Explanation of symbols: 10 fan casing; 11 air intake; 12 exhaust; 13 drive; 14 internal space; 20 base; 21 body; 22 support column; 221 parallel edge; 23 connecting piece; 30, 94 annular blades; 31 support column fixing hole; 311 fixed edge; 81 gas; 91 casing; 92 motor; 93 support; 941 circular hole; 95 circular ring spacer; 96 circular column; M rotation axis; θ1, θ2, θ3, θ4, θ5 angles between columns; L1 first curve; L2 second curve; W angle A in noise amplitude sudden increase area. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0029] See Figure 1. Figure 2 , Figure 3 , Figure 4 , Figure 5 and 6A The present invention is a viscous fluid fan device, which includes: a fan housing 10 having an air inlet portion 11, an exhaust portion 12, a driving portion 13 and an inner space 14.

[0030] A base 20 is provided corresponding to the fan housing 10, and the base 20 has a body 21, N support columns 22, a connecting member 23 and a rotation axis M. Wherein, the N is defined as a positive integer greater than or equal to 5, the N support columns 22 extend from the body 21, the connecting member 23 is coaxial with the rotation axis M, and the base 20 is coaxially connected to the driving part 13, and can be driven to rotate the base 20.

[0031] A plurality of annular blades 30 are stacked on the base 20 . The plurality of annular blades 30 are parallel to each other, and each of the plurality of annular blades 30 has a plurality of support column fixing holes 31 . The plurality of support column fixing holes 31 are used for the corresponding annular blades 30 to pass through the plurality of support columns 22 .

[0032] The N support columns 22 are equidistant from the rotation axis M, and there is an inter-column angle between two adjacent support columns 22. The N support columns 22 have N inter-column angles (e.g. Fig. 6A As shown, they can be θ1, θ2, θ3, θ4 and θ5 respectively, and Fig. 6AIt is only for illustration, and the actual N inter-column angles may be all unequal or partially equal); the N inter-column angles are selected from one of all unequal and partially unequal, thereby reducing the number of annular blades 30 when rotating (such as Figure 5 As shown, the plurality of annular blades 30 inhale a gas 81 from the air inlet 11 when rotating, and the gas 81 flows through the inner space 14 and flows out from the radial position between the plurality of annular blades 30 toward the exhaust portion 12 as shown by the solid arrow. ), the amplitude of the noise at a specific frequency suddenly increases.

[0033] In practice, see Figure 6B Any one of the N supporting columns 22 has two parallel sides 221 .

[0034] Any one of the plurality of support column fixing holes 31 corresponds to any one of the N support columns 22 and has two fixing edges 311. The two fixing edges 311 are used to relatively fix the corresponding support column fixing hole 31 and the two parallel edges 221 of the support column 22, thereby improving the effect of the clamping fixation.

[0035] Furthermore, when the angles between the N columns are all unequal, the following states may be obtained: [a] The angles between the N columns are in an increasing relationship with equal spacing.

[0036] [b] The N-1 angles between the columns are generated by random numbers.

[0037] The part that needs to be specially explained here is that, for the existing viscous fluid fan, since the angles between adjacent circular columns (i.e., the angles between columns in this case) are arranged at equal angles (i.e., equal spacing), the lengths of the suspended parts of the several annular blades are also the same. With such a design, when the several annular blades are rotated, noise analysis can be performed to find that at certain frequencies, the amplitude of the noise will suddenly increase, and even have a certain regularity (possibly due to resonance), thereby making the noise value uncontrollable (the noise may suddenly increase). In response to the aforementioned problem, this case designs the angles between the N columns to be either completely unequal or partially unequal, thereby reducing the sudden increase in the amplitude of the noise at a specific frequency when the several annular blades 30 rotate.

[0038] The results of comparing the embodiments of this case with the existing devices are shown in Table 1 below: (Table 1) Regarding the first embodiment of the present case, the five inter-column angles are 70 degrees, 71 degrees, 72 degrees, 73 degrees and 74 degrees respectively. That is, with 72 degrees as the base, the angles are increased (or decreased, in fact, it is an equivalent replacement design) in sequence by a fixed value (that is, the inter-column angles are in an increasing relationship with equal intervals), such as -2, -1, +1 and +2 (degrees) respectively. That is, five inter-column angles of 70 degrees (θ1), 71 degrees (θ2), 72 degrees (θ3), 73 degrees (θ4) and 74 degrees (θ5) are formed in sequence.

[0039] Regarding the second embodiment of the present case, the five inter-column angles are 71 degrees, 71.5 degrees, 72 degrees, 72.5 degrees and 73 degrees. That is, with 72 degrees as the base, another fixed value is increased (or decreased) respectively, such as -1, -0.5, +0.5 and +1 (degrees). Thus, five inter-column angles of 71 degrees (θ1), 71.5 degrees (θ2), 72 degrees (θ3), 72.5 degrees (θ4) and 73 degrees (θ5) are formed in sequence.

[0040] Regarding the third embodiment of the present case, 4 of the 5 (N) inter-column angles can be between 70 degrees and 74 degrees, and N-1 values ​​can be generated by random numbers, for example: 70.3 degrees (θ1), 72.6 degrees (θ2), 72.1 degrees (θ3), 71.9 degrees (θ4), and then, the above 4 values ​​are subtracted from 360 to obtain 73.1 degrees (θ5). In other words, random numbers can be used to generate N-1 different values, and finally all the values ​​generated by random numbers are subtracted from 360 degrees. The remaining angle is the value of the Nth inter-column angle. Moreover, the inventors have found that the random number generation method of the third embodiment of the present case can best avoid the problem of resonance at the same angle, and the effect is better than the previous two embodiments.

[0041] Regarding the fourth embodiment of the present case, the angles between the columns are "partially unequal". There are two angles between the columns that are both 72 degrees (for example, θ1 and θ2); in addition, two angles between the columns can be generated by random numbers between 71 and 73, such as 71.3 degrees (θ3) and 72.2 degrees (θ4). Afterwards, the aforementioned 4 values ​​are subtracted from 360, and 360-72-72-71.3-72.2=72.5 degrees (θ5) is obtained. In other words, part of the angles can be equal and part of the angles can be unequal. For the part with unequal angles, random numbers can be used to generate several different values, and finally 360 degrees are subtracted from the known value, and the remaining angle is the value of the Nth angle between the columns. Moreover, the inventors have found that the "partially unequal" angles between the columns in the fourth embodiment of the present case can also avoid the problem of resonance at the same angles, and the effect is better than that of the existing devices.

[0042] Furthermore, although the fourth embodiment includes two parts, "partially equal" and "partially unequal", it is better that the number of unequal angles between the columns is greater than 50% (>50%; i.e., more than half). For example, when N=5, the number of unequal angles between the columns should be greater than 2.5, i.e., 3, and the remaining 2 angles between the columns can be equal. If N=7, the number of equal angles between the columns should be less than 3.5, i.e., at most 3, and the remaining 4 angles between the columns must be unequal; in other words, the number of "partially unequal" is better than the number of "partially equal", so as to avoid resonance better.

[0043] Of course, the numbers or values ​​in the first four embodiments are disclosed only for the convenience of description and can be flexibly modified.

[0044] In addition, in the aforementioned third embodiment, the angle range of the random number generation is preferably within the range of ±2.78% of the average inter-column angle. For example, when N=5, 360 / 5=72 (degrees), and 72±2 (degrees) has a very good effect.

[0045] For a sudden increase in the amplitude of noise at a specific frequency, see Figure 7 , wherein the horizontal axis is the frequency, the vertical axis is the amplitude of the noise, and a first curve L1 represents the existing device, and a second curve L2 represents the third embodiment of the present case.

[0046] Depend on Figure 7 It can be clearly seen that the first curve L1 generates 5 noise amplitude sudden increase areas W between the frequencies of 100 Hz and 1000 Hz, while the second curve L2 does not have such a phenomenon at the corresponding positions. It is clearly seen that the present invention can stably control the noise value.

[0047] Therefore, it can be proved that the viscous fluid fan device of the present invention is superior to the existing device.

[0048] The advantages and effects of the present invention can be summarized as follows: [1] The design of unequal angles between columns can reduce the sudden increase in noise amplitude. In this case, the angles between the N supporting columns are either completely unequal or partially unequal, thereby reducing the sudden increase in noise amplitude caused by resonance at a specific frequency when a number of annular blades rotate. Therefore, the design of unequal angles between columns can reduce the sudden increase in noise amplitude.

[0049] [2] Easy to implement and low cost. In this case, the positions of the N support columns on the main body are adjusted respectively, and then the positions of the openings of the N support columns are adjusted in coordination with the support column fixing holes on the annular blades. This is easy and feasible to implement, with low cost and no difficulty for those familiar with this technical field. Therefore, it is easy to implement and low cost.

[0050] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A viscous fluid fan device, characterized in that: include: A fan housing having an air inlet portion, an exhaust portion, a driving portion and an inner space; A base is provided corresponding to the fan housing, the base having a body, N support columns, a connecting member and a rotation axis; wherein N is defined as a positive integer greater than or equal to 5, the N support columns extend from the body, the connecting member is coaxial with the rotation axis, and the base is coaxially connected to the driving part and can be driven to rotate the base; A plurality of annular blades are stacked on the base, the plurality of annular blades are parallel to each other, and each of the plurality of annular blades has a plurality of support column fixing holes, and the plurality of support column fixing holes are used for the corresponding annular blades to pass through the plurality of support columns; and The N support columns are equidistant from the rotation axis respectively, there is an inter-column angle between two adjacent support columns, and there are N inter-column angles between the N support columns; the N inter-column angles are selected from either completely unequal or partially unequal, thereby being able to reduce the sudden increase in the amplitude of noise at a specific frequency when the plurality of annular blades rotate.

2. The viscous fluid fan device according to claim 1, characterized in that: Any one of the N supporting columns has two parallel sides; and Any one of the plurality of support column fixing holes corresponds to any one of the N support columns and has two fixing edges, and the two fixing edges are used for fixing the corresponding support column fixing hole relative to the two parallel edges of the support column.

3. The viscous fluid fan device according to claim 1, characterized in that: The N inter-column angles are all unequal; and The angles between the N columns are in an increasing relationship with equal intervals.

4. The viscous fluid fan device according to claim 3, characterized in that: The N angles between the columns are 5; and The included angles between the five columns are 70 degrees, 71 degrees, 72 degrees, 73 degrees and 74 degrees respectively.

5. The viscous fluid fan device according to claim 3, characterized in that: The N angles between the columns are 5; and The included angles between the five columns are 71 degrees, 71.5 degrees, 72 degrees, 72.5 degrees and 73 degrees respectively.

6. The viscous fluid fan device according to claim 3, characterized in that: The angle between the N columns is 5; The N-1 inter-column angles are randomly generated and are 70.3 degrees, 72.6 degrees, 72.1 degrees and 71.9 degrees respectively; and The last angle between columns is 73.1 degrees, and the total angle of the five angles between columns is 360 degrees.

7. The viscous fluid fan device according to claim 1, characterized in that: The angles between the N columns are partially unequal; The N angles between the columns are 5; and The included angles between the five columns are 72 degrees, 72 degrees, 71.3 degrees, 72.2 degrees and 72.5 degrees respectively.

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