TWI674363B - Fan frame for noise reduction - Google Patents

Abstract

A fan fan frame capable of reducing noise includes an outer frame body surrounding an inner space, a shaft tube seat located in the inner space, and a plurality of stationary blades extending from an outer wall surface of the shaft tube seat toward the outer frame body. And multiple partitions. Each partition connects at least one of the stationary blades to an inner wall surface of the outer frame. The internal space has an air inlet and an air outlet. Each static blade is disposed on the shaft tube base away from the bottom of the shaft tube base along a flow direction. Each partition cooperates with the outer frame to define a partition space that communicates with the internal space. The design of the partition spaces can not only achieve the effect of reducing noise, but also does not need to increase the volume of the outer frame. To form a cavity, the outer frame can adopt a thin and light design to reduce the area facing the wind, and can simultaneously suppress the noise at the air inlet and the air outlet.

Description

Fan frame for noise reduction

The invention relates to a frame, in particular to a fan frame of a fan.

With the continuous advancement of technology, the size of integrated circuits and electronic components is becoming more and more miniaturized, so higher density configurations can be produced, resulting in powerful computing capabilities and functionality, but it also requires good heat dissipation to maintain normal At the working temperature, a common cooling fan is a cooling device that drives airflow or fluid through rotating fan blades to achieve a good air cooling effect. General cooling fans are often accompanied by unpleasant noise during operation. The reasons are mostly (1) noise caused by the overall vibration caused by the rotation of the fan blades, and (2) when the airflow passes through the fan, the airflow Noise generated at the inlet and outlet by disturbance or flow field disturbance. The main cause of the former is the overall vibration caused by the fan blades, which causes the fan frame and the environment in which it is installed to make noise. Usually, the noise can be mitigated by providing cushioning elements between the fan frame and the installation environment or strengthening the bonding strength between the elements. produce. However, the latter not only generates large noise, but also cannot be overcome through the buffer element or the enhanced bonding strength, so it is a problem to be overcome in the field of cooling fan technology.

Referring to FIGS. 1 and 2, in order to solve the aforementioned noise problem, the invention patent of the People's Republic of China No. CN105317749A discloses a fan frame. The fan frame 1 includes a bearing housing 11 and a bearing housing 11 surrounding the bearing housing 11 and connected to the bearing.座 11 的 外壳 体 12。 The outer frame body 12. The outer frame 12 includes a top wall portion 121, an inner side wall portion 122 connected to an inner edge of the top wall portion 121 and extending downward, and an outer side wall portion connected to an outer edge of the top wall portion 121 and extending downward. 123, and a bottom wall portion 124 connecting the inner sidewall portion 122 and the bottom edge of the outer sidewall portion 123. The top wall portion 121, the inner side wall portion 122, the outer side wall portion 123, and the bottom wall portion 124 cooperate to define a cavity 125. The bottom wall portion 124 is formed with a plurality of openings 126 communicating with the cavity 125. The outer frame 12 defines an air inlet 13 and an air outlet 14. Through the opening 126 communicating with the air outlet 14, the airflow flowing from the air inlet 13 toward the air outlet 14 can be introduced into the opening 126 and enter. In the cavity 125, a vortex is formed at the opening 126 through the aforementioned method to absorb a part of the turbulence at the air outlet 14, so as to reduce the noise at the end of the air outlet 14.

However, in order to form the cavity 125 inside the outer frame 12, a design of increasing the area of the top wall portion 121 is adopted, which increases the windward area of the outer frame 12 toward the air inlet 13, but instead leads to an air inlet. The noise at 13 places increases; moreover, the thick outer frame shape of the top wall portion 121 of the outer frame body 12 does not conform to the current trend of pursuing thin and thin fan frames without occupying space; in addition, when airflow enters the same chamber through multiple openings 126 After 125, it is easy to collide with each other due to the opposite directions, and finally resonate in the cavity 125, which will increase the noise, so the fan frame 1 still needs to be improved in terms of noise reduction.

Therefore, an object of the present invention is to provide a fan frame capable of reducing noise.

Therefore, the fan fan frame capable of reducing noise according to the present invention includes an outer frame surrounding an inner space through which airflow can pass in a flow direction, a shaft socket in the inner space, and a plurality of the shaft sockets. A stationary blade with an outer wall surface extending toward the outer frame body, and a plurality of partition plates. Each partition connects at least one of the stationary blades to an inner wall surface of the outer frame.

The internal space has an air inlet and an air outlet located below the air inlet. Each stationary blade is disposed on the shaft tube base away from the bottom edge of the shaft tube base along the flow direction. Each partition cooperates with the outer frame to define a partition space that communicates with the inner space.

Therefore, another object of the present invention is to provide another fan frame capable of reducing noise.

Therefore, the fan frame capable of reducing noise according to the present invention includes an outer frame surrounding an inner space through which airflow can pass in a flow direction, a shaft tube seat located in the inner space, and a plurality of static blades. The internal space has an air inlet and an air outlet located below the air inlet. The shaft tube seat includes a body portion and at least one spacer portion connected to the seat body portion. The spacer portion cooperates with the seat body portion to define a space space communicating with the internal space. The stationary blades extend from the outer wall surface of the spacer portion of the shaft socket and are connected to the inner wall surface of the outer frame.

The function of the present invention is that the partitions and partitions are connected to the static blades and the seat bodies, and define a plurality of partitions and partitions adjacent to the air outlet to absorb turbulence. Not only can achieve the effect of noise reduction, and the outer frame does not need to be thickened or increased in volume to form a cavity, and a thin and light design can be adopted to reduce the area facing the wind, and the noise at the air inlet and the air outlet can be suppressed at the same time . In addition, the partitions or compartments are not connected, so the airflow enters the partitions without converging, which prevents the airflows from colliding with each other to resonate, further reducing the generation of noise.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are represented by the same numbers.

Referring to FIGS. 3 and 4, a first embodiment of a fan frame capable of reducing noise according to the present invention includes an outer frame body 2 surrounding an inner space 20, and an outer frame body located in the inner space 20. 2 surrounds the shaft tube holder 3, a plurality of stationary blades 4 extending from the outer wall surface 30 of the shaft tube holder 3 toward the outer frame body 2, and four partition plates 5 connecting a plurality of the stationary blades 4. In the first embodiment, the outer frame 2 is formed by combining the upper and lower parts with a buckle, but it can also be a one-piece design, which should not be limited to this. The inner space 20 has an air inlet 201 And an air outlet 202 located below the air inlet 201, the internal space 20 allows airflow to enter from the air inlet 201 along a flow direction A (in the first embodiment, the up-down direction), and from the air inlet 201 The air outlet 202 flows out.

Each stationary blade 4 is away from the bottom 301 of the shaft socket 3 and adjacent to the top 302 of the shaft socket 3 along the flow direction A, and is inclined upward from the outer wall surface 30 of the shaft socket 3 as shown in FIG. 4. Extended, part of the stationary blades 4 are connected to the partition plates 5, and the other stationary blades 4 are connected to the inner wall surface 21 of the outer frame 2. A gap 41 is formed between any two adjacent stationary blades 4 to communicate the air inlet 201 and the air outlet 202. Each partition 5 connects a plurality of corresponding stationary blades 4 and the inner wall surface 21 of the outer frame 2, and includes a plate body portion 51 which defines a partition space 50 in cooperation with the outer frame 2, and two The board body portion 51 and the partition portion 52 of the outer frame body 2 are spaced from each other and connected. The bottom edge 511 of the plate body portion 51 is flush with the bottom end 411 where the corresponding stationary blade 4 is connected. The partitions 52 divide the partition 50 into a plurality of chambers 501. The chambers 501 communicate with the internal space 20 and the air outlet 202. In the first embodiment, the number of the partition plates 5 is four, and the partition plates 5 are respectively located at the four corners of the outer frame body 2. However, according to the configuration requirements, the number of the partition plates 5 may be different and set at different positions. Each partition plate 5 may also be connected to only one stationary blade 4, and it should not be limited to this.

When the airflow enters the air inlet 201, it will be sent out from the air outlet 202 after passing through the gap 41 between the stationary blades 4, and part of the airflow will flow into the chambers 501 communicating with the air outlet 202, so that A vortex is generated near the air outlet 202, so that the turbulence of the air outlet 202 can be absorbed and reduced, and the noise at the air outlet 202 can be reduced. In addition, since the chambers 501 are partitioned by the partitions 5 and the outer frame 2 and are not contained in the outer frame 2, there is no need to increase the thickness or volume of the outer frame 2. The formation of these chambers 501 can not only avoid the increase of noise at the air inlet 201 due to the increase in the area facing the wind, but also make the outer frame 2 thin and thin to meet the current market trend, and separate the The iso-chamber 501 can prevent the air flows in different directions from colliding with each other to generate resonance, thereby achieving the effect of further suppressing noise.

Referring to FIG. 5, FIG. 6, and FIG. 7, as mentioned above, in addition to the combined design shown in FIG. 4, the outer frame 2 may also be an integrated design as shown in FIGS. 5 to 7. This design makes the partitions 52 of the partition 5 integrated with the outer frame 2, and the plate portion 51 of each partition 5 can move toward the air outlet 202 along the flow direction A as shown in FIG. 5. Extend (ie, extend downward), so that the bottom edge 511 of the plate body portion 51 is closer to the air outlet 202 than the bottom end 411 of the corresponding joint of the stationary blade 4, and in order to enable the chambers 501 to communicate with the internal space 20 Therefore, the bottom edge 511 of the plate body portion 51 is located in the internal space 20 without exceeding the air outlet 202. The plate body portion 51 may also have the top edge 512 extending toward the air inlet 201 in a direction opposite to the flow direction A (ie, the top edge 512 extends upward) as shown in FIG. 6, and the top edge of the plate body portion 51 512 is integrally connected to the outer frame 2, and the partitions 52 are located above the stationary blade 4. Of course, the plate body portion 51 may also be as shown in FIG. 7. The top edge 512 and the bottom edge 511 extend upward and downward, respectively (ie, extend toward the air inlet 201 and the air outlet 202 respectively), and the top edge 512 is integrated. Connected to the outer frame 2, the bottom edge 511 is closer to the air outlet 202 than the bottom end 411 of the corresponding joint of the stationary blade 4, and is located in the inner space 20. The aforementioned different configurations can adjust the depth of the chambers 501 and the overall structural strength, thereby improving versatility.

8 to FIG. 11, a second embodiment of a fan frame capable of reducing noise according to the present invention is substantially the same as the first embodiment, except that the shaft socket 3 It includes a body portion 31 and a plurality of spacer portions 32 connecting a plurality of the stationary blades 4 to the seat body portion 31. The partition portion 32 and the seat body portion 31 cooperate to define a partition space 33 that communicates with the internal space 20. Each of the spacers 32 has a receiving section 321 extending along the flow direction A toward the air outlet 202 and having a bottom located in the internal space 20, and a plurality of connecting sections 322 connecting the seat body 31 and the receiving section 321. The connecting sections 322 partition the partition space 33 into a plurality of sound-absorbing chambers 331 (each partition section 32 in FIG. 8 shows only one of the connecting sections 322). In addition to retaining the chambers 501 of the first embodiment, the configuration of the second embodiment also forms a plurality of sound-absorbing chambers 331 inside the chambers 501 to achieve further drainage and generate eddy currents to absorb and reduce turbulence. Effect, and the second embodiment also does not need to increase the volume of the outer frame body 2 so that the outer frame body 2 can be made light and thin. As in the first embodiment, the bottom edge 511 of the plate body portion 51 of each partition plate 5 in the second embodiment can also be extended downward as shown in FIG. 9 so that it is relatively corresponding to the connection point of the stationary blade 4 The bottom end 411 is closer to the air outlet 202. As shown in FIG. 10, the bottom edge 511 of the plate body portion 51 and the bottom end 411 where the stationary blade 4 is connected are flush (as shown in FIG. 8). The equal partitions 52 are located above the corresponding stationary blades 4 to meet different structural requirements, or as shown in FIG. 11, the partition 5 also has the plate body portion 51 extending downwards and the partitions 52 The feature of being located above the corresponding stationary blade 4 shows that the second embodiment can also have various arrangement modes according to requirements.

Referring to FIG. 12, a third embodiment of a fan frame capable of reducing noise according to the present invention is substantially the same as the second embodiment, except that the third embodiment is not provided with The partitions 5 (see FIG. 11), and the aforementioned spacers 32 are provided only on the shaft socket 3, so that the two ends of each corresponding stationary blade 4 are respectively connected to the corresponding spacers 32 The outer wall surface 320 and the inner wall surface 21 of the outer frame body 2, so that the outer frame body 2 can be further thinned, and the configuration can be made compact by shortening the extension length of the stationary blades 4, which can be applied. Competitive and versatile on smaller electronic components.

In summary, the present invention introduces airflow through the chambers 501 and the sound-absorbing chambers 331 to form a vortex, thereby reducing and absorbing the turbulence formed at the air outlet 202 to achieve the effect of reducing noise. The cavity 501 and the sound-absorbing chambers 331 are not hidden in the outer frame 2, so the volume of the outer frame 2 does not need to be increased, and the thin design of the outer frame 2 can be maintained, so the cost can be achieved. The purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited in this way, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the patent specification of the present invention are still Within the scope of the invention patent.

1‧‧‧ fan frame

11‧‧‧bearing

12‧‧‧ Outer frame

121‧‧‧Top wall section

122‧‧‧ inner wall

123‧‧‧outer wall

124‧‧‧ bottom wall

125‧‧‧ chamber

126‧‧‧ opening

13‧‧‧air inlet

14‧‧‧outlet

2‧‧‧ outer frame

20‧‧‧ Internal space

201‧‧‧air inlet

202‧‧‧outlet

21‧‧‧Inner wall surface

3‧‧‧ Shaft Tube Seat

30‧‧‧ Outer wall surface

301‧‧‧ bottom

302‧‧‧Top

31‧‧‧ seat body

32‧‧‧ spacer

320‧‧‧ Outer wall surface

321‧‧‧undertake section

322‧‧‧connection section

33‧‧‧ Space

331‧‧‧ sound absorption room

4‧‧‧ static blade

41‧‧‧ Clearance

411‧‧‧ bottom

5‧‧‧ partition

50‧‧‧ divided space

501‧‧‧ chamber

51‧‧‧Board body

511‧‧‧ bottom edge

512‧‧‧Top margin

52‧‧‧ Division

A‧‧‧flow direction

Other features and effects of the present invention will be clearly presented in the embodiment with reference to the drawings, in which: FIG. 1 is a conventional perspective cross-sectional view illustrating a fan frame disclosed in the invention patent case No. CN105317749A of the People's Republic of China Figure 2 is a conventional bottom view illustrating the bottom view of Figure 1; Figure 3 is a bottom view illustrating a first embodiment of a fan frame capable of reducing noise according to the present invention; Figure 4 is a front sectional view, Auxiliary explanation of the component configuration of FIG. 3; FIGS. 5 to 7 are front sectional views illustrating other aspects of the partitions in the first embodiment; FIG. 8 is a front sectional view illustrating that the present invention can reduce A second embodiment of a fan fan frame of noise; FIGS. 9 to 11 are front sectional views illustrating other aspects of the partitions in the second embodiment; and FIG. 12 is a front sectional view, A third embodiment of a fan frame capable of reducing noise according to the present invention will be described.

Claims (9)

A fan fan frame capable of reducing noise, comprising: an outer frame body surrounding an internal space through which airflow can pass in a flow direction, the internal space having an air inlet and an air outlet located below the air inlet; A shaft socket is located in the inner space; a plurality of static blades extend from the outer wall surface of the shaft socket toward the outer frame body, and each static blade is arranged on the shaft socket in a direction away from the bottom of the shaft socket in the flow direction. And is adjacent to the top of the shaft socket; and a plurality of partitions, each partition is connected to at least one of the stationary blades and the inner wall surface of the outer frame, and each partition is defined in cooperation with the outer frame A partition space communicating with the internal space is provided, and each partition includes a plate body portion which cooperates with the outer frame body to define the partition space, and connects the plate body portion and the outer frame body and divides the partition space area. At least one partition is isolated from the plurality of chambers. The fan frame capable of reducing noise as described in claim 1, wherein the bottom edge of the plate body portion of each partition is flush with the bottom end of the corresponding stationary blade connection. The fan frame capable of reducing noise as described in claim 1, wherein the plate body portion of each partition extends along the flow direction toward the air outlet and is located in the internal space, and the bottom edge of the plate body portion is compared with The bottom end corresponding to the joint of the stationary blade is closer to the air outlet. The fan fan frame capable of reducing noise according to claim 2, wherein a plate body portion of each partition plate extends toward the air inlet in a direction opposite to the flow direction, and the at least one partition portion runs in a direction opposite to the flow direction Located in connected leaves Above the tablet. The fan fan frame capable of reducing noise as described in claim 1, wherein the bottom edge and the top edge of the plate body portion of each partition extend toward the air outlet and the air inlet respectively along the flow direction, and the plate body portion The top edge and the bottom edge are both located in the internal space. The bottom edge of the plate body portion is closer to the air outlet than the bottom end of the corresponding static blade connection, and the at least one partition portion is in the opposite direction of the flow direction. Located above the connected stationary blades. The fan frame capable of reducing noise according to any one of claims 1 to 5, wherein the shaft tube seat includes a body portion, and at least one space connecting at least one of the stationary blades with the body portion of the seat body The at least one spacer portion cooperates with the seat body portion to define a spacer space communicating with the internal space. The fan fan frame capable of reducing noise according to claim 6, wherein the at least one spacer has a receiving section extending along the flow direction toward the air outlet and the bottom is located in the internal space, and connects the seat body and the The receiving section separates the space into at least one connecting section of a plurality of sound-absorbing chambers. A fan fan frame capable of reducing noise, comprising: an outer frame body surrounding an internal space through which airflow can pass in a flow direction, the internal space having an air inlet and an air outlet located below the air inlet; A shaft socket is located in the internal space, and includes a body portion and at least one spacer portion connected to the seat body portion. The at least one spacer portion cooperates with the seat body portion to define a space space communicating with the internal space. And a plurality of stationary blades extending from the outer wall surface of the at least one spacer portion of the shaft socket and connecting the inner wall surface of the outer frame body. The fan frame capable of reducing noise as described in claim 8, wherein the at least one spacer has a receiving section extending along the flow direction toward the air outlet and the bottom is located in the internal space, and connects the seat body and The receiving section separates the space into at least one connecting section of the plurality of sound absorbing chambers.