Adjustable noise reduction ventilation grille

Abstract

The invention relates to an adjustable noise reduction ventilation grille which comprises a plurality of first grille strips and rotating shafts with the same number as the first grille strips, the first grille strips correspond to the rotating shafts one to one, any first grille strip is parallel to the corresponding rotating shaft, and the rotating shafts are inserted into the corresponding first grille strips and located on the inner sides of the first grille strips; the number of the second grating strips is consistent with that of the first grating strips, the second grating strips correspond to the rotating shafts one to one, any second grating strip is parallel to the corresponding rotating shaft, and the rotating shafts are inserted into the corresponding first grating strips and located on the inner sides of the second grating strips; wherein the inner side of each first grille strip is close to the side corresponding to the second grille strip, the inner side of each second grille strip is close to the side corresponding to the first grille strip, the two surfaces of each first grille strip are both provided with recesses, and the two surfaces of each second grille strip are both provided with recesses. Compared with the prior art, the invention has the advantages of noise reduction, adjustable wind resistance and the like.

Description

Technical Field

[0001] This invention relates to ventilation grilles, and more particularly to an adjustable noise-reducing ventilation grille. Background Technology

[0002] Power equipment, including active power filters, requires heat dissipation, which can take the form of liquid cooling or air cooling, with air cooling being the primary method currently.

[0003] Air cooling requires a fan to draw in cold air from the outside or blow out hot air from inside. As the fan drives the airflow, it generates noise, which can cause noise pollution to the environment. Therefore, those skilled in the art are dedicated to reducing this kind of noise.

[0004] In response, for example, Chinese patent CN201633680U discloses a ventilation grille that uses a reverse bend at the end of each grille bar to block sound waves. However, this method affects the airflow and can only achieve unidirectional noise reduction.

[0005] In addition, Chinese patent CN 103292441 A discloses a biomimetic noise reduction grille, which has a serrated structure at the front and rear edges of the grille. The serrated unit bodies of the serrated structure are evenly distributed along the edge of the grille and are symmetrically distributed at the front and rear edges of the grille. The serrated structure at the front and rear edges can suppress the shedding of the vortex at the tail of the grille, reduce the pulsating pressure on the grille surface caused by the unsteady airflow, and ultimately reduce the aerodynamic noise generated by the grille under the airflow.

[0006] However, this biomimetic noise reduction grid can only reduce noise for sound waves whose propagation direction is parallel to the base surface of the grid strips. Although it can achieve bidirectional noise reduction, the noise reduction effect is limited. Summary of the Invention

[0007] The purpose of this invention is to provide an adjustable noise-reducing ventilation grille.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] An adjustable noise-reducing ventilation grille includes:

[0010] Multiple first grid strips and rotating shafts of the same number as the first grid strips, each first grid strip and each rotating shaft correspond one-to-one, any first grid strip is arranged parallel to the corresponding rotating shaft, and the rotating shaft is inserted into the corresponding first grid strip and located inside the first grid strip;

[0011] The number of second grid bars is the same as that of the first grid bars, and each second grid bar and each rotating shaft are in one-to-one correspondence. Any second grid bar is arranged parallel to the corresponding rotating shaft, and the rotating shaft is inserted into the corresponding first grid bar and located inside the second grid bar.

[0012] The inner side of the first grid bar is the side closest to the corresponding second grid bar, the inner side of the second grid bar is the side closest to the corresponding first grid bar, and both surfaces of the first grid bar and both surfaces of the second grid bar are provided with recesses, and the axes of all rotating shafts are in one plane.

[0013] The inner edge of the first grid bar is provided with a plurality of cylindrical first rings, the inner diameter of all the first rings is consistent with the outer diameter of the rotating shaft, and the axes of all the first rings are on a straight line.

[0014] The inner edge of the second grid bar is provided with a plurality of cylindrical second rings, the inner diameter of all the second rings is consistent with the outer diameter of the rotating shaft, and the axes of all the second rings are on a straight line;

[0015] For any corresponding first grid bar and second grid bar, the projection line segment of any first ring on the first grid bar on the axis of the rotating shaft does not overlap with the projection line segment of any second ring on the axis of the rotating shaft, and the rotating shaft is set through each first ring and each second ring.

[0016] The first grid bar is also provided with a first elastic sleeve, and the second grid bar is also provided with a second elastic sleeve. Both the first elastic sleeve and the second elastic sleeve are provided with external threads. The rotating shaft passes through the first elastic sleeve and the second elastic sleeve, and the first elastic sleeve and the second elastic sleeve are locked by a locking nut to prevent the first grid bar and the second grid bar from rotating relative to the rotating shaft.

[0017] The first elastic sleeve and the second elastic sleeve are located at the two ends of the rotating shaft, and the projection lines of all the first and second sleeves on the axis of the rotating shaft are located between the projection lines of the first and second elastic sleeves on the axis of the rotating shaft.

[0018] The first elastic sleeve and the second elastic sleeve have the same structure.

[0019] The first elastic sleeve has multiple strip-shaped notches, which are arranged along the axial direction.

[0020] The rotation angle of the first and second grid bars is ±45 degrees.

[0021] The depression is semi-cylindrical.

[0022] The center of the groove on one side of the first grid bar is projected onto the base surface of the first grid bar to form a first projection line, which is interspersed with the center of the groove on the other side of the first grid bar to form a second projection line. The distance between any first projection line and an adjacent second projection line is half the distance between any projection line and any adjacent projection line.

[0023] The center of the groove on one side of the second grid bar is projected onto the base surface of the second grid bar to form a third projection line, which is interspersed with the center of the groove on the other side of the second grid bar to form a fourth projection line. The distance between any third projection line and the adjacent fourth projection line is half the distance between any three projection lines and any three adjacent projection lines.

[0024] All the first grid strips are arranged in parallel.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. By setting up grille bars with recesses on both the upper and lower surfaces, and allowing two interconnected grille bars to rotate around the same axis, the flow resistance and sound waves can be adjusted by changing the curvature and angle of the recesses while adjusting the air guide angle, thus achieving dual adjustment of wind noise and wind resistance.

[0027] 2. The first and second grille bars are symmetrically arranged, so they can be used for both air outlets and air inlets, making them widely applicable.

[0028] 3. By combining the two bars in the form of rings, a larger rotation angle can be achieved, and the rotation of the first and second grid bars can be independent of each other.

[0029] 4. The angle of the grid strip can be easily fixed by using the elastic sleeve and the locking nut.

[0030] 5. The center of the groove on one side of the first grid bar is projected onto the base surface of the first grid bar to form a first projection line, which is interspersed with the center of the groove on the other side of the first grid bar to form a second projection line. The distance between any first projection line and the adjacent second projection line is half the distance between any projection line and any adjacent projection line. This can reduce the manufacturing cost on the one hand, and reduce the noise reduction effect caused by the superposition of sound waves on the other side after the sound waves pass through the grid bar. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the first grid bar;

[0033] Figure 3 This is a schematic diagram showing the bottom view of the first grille bar;

[0034] Figure 4 This is a schematic diagram of the first set of rings;

[0035] Figure 5 This is a schematic diagram of the first elastic sleeve;

[0036] Figure 6 This is a schematic diagram of state two of the present invention;

[0037] Figure 7 This is a schematic diagram of state three of the present invention;

[0038] Figure 8 This is a schematic diagram of state four of the present invention;

[0039] Figure 9 This is a schematic diagram of state five of the present invention;

[0040] Among them: 1. rotating shaft, 2. second grid bar, 3. second grid bar, 2-1. recess, 2-2. first collar, 2-3. first elastic sleeve. Detailed Implementation

[0041] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "proximal," "distal," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0044] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] An adjustable noise-reducing ventilation grille, such as Figure 1 As shown, it includes:

[0047] Multiple first grid strips 2 and rotating shafts 1 in the same number as the first grid strips 2, each first grid strip 2 and each rotating shaft 1 correspond one-to-one, any first grid strip 2 is arranged parallel to the corresponding rotating shaft 1, and the rotating shaft 1 is inserted into the corresponding first grid strip 2 and located inside the first grid strip 2;

[0048] The number of second grid bars 3 is the same as that of the first grid bars 2. Each second grid bar 3 corresponds to each rotating shaft 1. Any second grid bar 3 is arranged parallel to the corresponding rotating shaft 1, and the rotating shaft 1 is inserted into the corresponding first grid bar 2 and located inside the second grid bar 3.

[0049] Wherein, the inner side of the first grille strip 2 is the side closest to the corresponding second grille strip 3, and the inner side of the second grille strip 3 is the side closest to the corresponding first grille strip 2, and as shown... Figure 2 and Figure 3 As shown, both surfaces of the first grid bar 2 are provided with recesses 2-1, and both surfaces of the second grid bar 3 are provided with recesses 2-1, and the axes of all rotating shafts 1 are in one plane.

[0050] By setting up grille bars with recesses 2-1 on both the upper and lower surfaces, and by allowing two interconnected grille bars to rotate around the same axis 1, the flow resistance and sound waves can be adjusted by changing the curvature and angle of the recesses 2-1 while adjusting the air guide angle, thereby achieving dual adjustment of wind noise and wind resistance.

[0051] In addition, the first grille strip 2 and the second grille strip 3 are symmetrically arranged, so they can be used for both air outlets and air inlets, making them widely applicable.

[0052] In most embodiments, a plurality of cylindrical first rings 2-2 are provided at the inner edge of the first grid strip 2, the inner diameter of all the first rings 2-2 is consistent with the outer diameter of the rotating shaft 1, and the axes of all the first rings 2-2 are on a straight line.

[0053] Similarly, multiple cylindrical second rings are provided on the inner edge of the second grid strip 3. The inner diameter of all the second rings is the same as the outer diameter of the rotating shaft 1, and the axes of all the second rings are on a straight line.

[0054] For any corresponding first grid bar 2 and second grid bar 3, the projection line segment of any first collar 2-2 on the axis of the rotating shaft 1 does not overlap with the projection line segment of any second collar on the axis of the rotating shaft 1. The rotating shaft 1 is set through each first collar 2-2 and each second collar.

[0055] By combining them in the form of interlocking rings, a large rotation angle can be achieved, and the rotation of the first grid strip 2 and the second grid strip 3 can be independent of each other, allowing for free rotation. Figures 6-9 As shown.

[0056] In addition, in some embodiments, the first grid bar 2 is provided with a first elastic sleeve 2-3, and the second grid bar 3 is provided with a second elastic sleeve. Both the first elastic sleeve 2-3 and the second elastic sleeve are provided with external threads. The rotating shaft 1 passes through the first elastic sleeve 2-3 and the second elastic sleeve, and the first elastic sleeve 2-3 and the second elastic sleeve are locked by a locking nut to prevent the first grid bar 2 and the second grid bar 3 from rotating relative to the rotating shaft 1.

[0057] The first elastic sleeve 2-3 and the second elastic sleeve are located at the two ends of the rotating shaft 1, and the projection lines of all the first ring 2-2 and the second ring on the axis of the rotating shaft 1 are located between the projection lines of the first elastic sleeve 2-3 and the second elastic sleeve on the axis of the rotating shaft 1.

[0058] The angle of the grid strips can be easily fixed by the cooperation of the elastic sleeve and the locking nut. In this type of embodiment, the adjustment mode is mainly manual. Of course, in other embodiments, an automatic adjustment method can also be used, such as motor control.

[0059] Generally, the first elastic sleeve 2-3 and the second elastic sleeve have the same structure.

[0060] like Figure 5As shown, the first elastic sleeve 2-3 has multiple strip-shaped notches arranged axially. The first elastic sleeve 2-3 includes a base part and a locking part. The inner diameter of the locking part gradually decreases from one end near the base part to the suspended end. During the screwing of the locking nut from the suspended end to the one near the base part, it drives the inner wall of the locking part to press against the rotating shaft 1 to achieve locking. In order to cooperate with the first elastic sleeve 2-3, as shown... Figure 4 As shown, the distance between the first ring 2-2 and the main body of the first grid bar 2 is also increased by a connecting rod, thereby increasing the distance between the rotating shaft 1 and the main body of the first grid bar 2. Based on this, space can be reserved for the locking nut.

[0061] In this embodiment, the rotation angle of the first grid bar 2 and the second grid bar 3 is ±45 degrees.

[0062] Furthermore, in this embodiment, the recess 2-1 is semi-cylindrical. The center of the groove on one side of the first grid bar 2 is projected onto the base surface of the first grid bar 2 to form a first projection line, which is interspersed with the center of the groove on the other side of the first grid bar 2 to form a second projection line. The distance between any first projection line and the adjacent second projection line is half the distance between any projection line and any adjacent projection line.

[0063] The center of the groove on one side of the second grid strip 3 is projected onto the base surface of the second grid strip 3 to form a third projection line, which is interspersed with the center of the groove on the other side of the second grid strip 3 to form a fourth projection line. The distance between any third projection line and the adjacent fourth projection line is half the distance between any three projection lines and any three adjacent projection lines.

[0064] This can reduce process costs on the one hand, and reduce the decrease in noise reduction effect caused by the superposition of sound waves on the other side after the sound waves pass through the grid bars on the other side.

[0065] Generally, all the first grille bars 2 are set in parallel to achieve quick selective balance adjustment of wind noise and wind resistance. The bidirectional adjustable blade angle does not restrict the direction of use and can be used for air outlet or air inlet. The unique blade design reduces wind resistance and provides a larger sound reflection surface.

Claims

1. An adjustable noise-reducing ventilation grille, characterized in that, include: Multiple first grid strips and rotating shafts of the same number as the first grid strips, each first grid strip and each rotating shaft correspond one-to-one, any first grid strip is arranged parallel to the corresponding rotating shaft, and the rotating shaft is inserted into the corresponding first grid strip and located inside the first grid strip; The number of second grid bars is the same as that of the first grid bars, and each second grid bar and each rotating shaft are in one-to-one correspondence. Any second grid bar is arranged parallel to the corresponding rotating shaft, and the rotating shaft is inserted into the corresponding first grid bar and located inside the second grid bar. The inner side of the first grid bar is the side closest to the corresponding second grid bar, the inner side of the second grid bar is the side closest to the corresponding first grid bar, and both surfaces of the first grid bar and both surfaces of the second grid bar are provided with recesses, and the axes of all rotating shafts are in one plane.

2. The adjustable noise-reducing ventilation grille according to claim 1, characterized in that, The inner edge of the first grid bar is provided with a plurality of cylindrical first rings, the inner diameter of all the first rings is consistent with the outer diameter of the rotating shaft, and the axes of all the first rings are on a straight line. The inner edge of the second grid bar is provided with a plurality of cylindrical second rings, the inner diameter of all the second rings is consistent with the outer diameter of the rotating shaft, and the axes of all the second rings are on a straight line; For any corresponding first grid bar and second grid bar, the projection line segment of any first ring on the first grid bar on the axis of the rotating shaft does not overlap with the projection line segment of any second ring on the axis of the rotating shaft, and the rotating shaft is set through each first ring and each second ring.

3. The adjustable noise-reducing ventilation grille according to claim 2, characterized in that, The first grid bar is also provided with a first elastic sleeve, and the second grid bar is also provided with a second elastic sleeve. Both the first elastic sleeve and the second elastic sleeve are provided with external threads. The rotating shaft passes through the first elastic sleeve and the second elastic sleeve, and the first elastic sleeve and the second elastic sleeve are locked by a locking nut to prevent the first grid bar and the second grid bar from rotating relative to the rotating shaft.

4. An adjustable noise-reducing ventilation grille according to claim 3, characterized in that, The first elastic sleeve and the second elastic sleeve are located at the two ends of the rotating shaft, and the projection lines of all the first and second sleeves on the axis of the rotating shaft are located between the projection lines of the first and second elastic sleeves on the axis of the rotating shaft.

5. An adjustable noise-reducing ventilation grille according to claim 3, characterized in that, The first elastic sleeve and the second elastic sleeve have the same structure.

6. An adjustable noise-reducing ventilation grille according to claim 5, characterized in that, The first elastic sleeve has multiple strip-shaped notches, which are arranged along the axial direction.

7. An adjustable noise-reducing ventilation grille according to claim 1, characterized in that, The rotation angle of the first and second grid bars is ±45 degrees.

8. An adjustable noise-reducing ventilation grille according to claim 1, characterized in that, The depression is semi-cylindrical.

9. An adjustable noise-reducing ventilation grille according to claim 8, characterized in that, The center of the groove on one side of the first grid bar is projected onto the base surface of the first grid bar to form a first projection line, which is interspersed with the center of the groove on the other side of the first grid bar to form a second projection line. The distance between any first projection line and an adjacent second projection line is half the distance between any projection line and any adjacent projection line. The center of the groove on one side of the second grid bar is projected onto the base surface of the second grid bar to form a third projection line, which is interspersed with the center of the groove on the other side of the second grid bar to form a fourth projection line. The distance between any third projection line and the adjacent fourth projection line is half the distance between any three projection lines and any three adjacent projection lines.

10. An adjustable noise-reducing ventilation grille according to claim 1, characterized in that, All the first grid bars are arranged in parallel.

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