CN218376988U - Structure and cigarette machine of making an uproar fall in water conservancy diversion - Google Patents
Structure and cigarette machine of making an uproar fall in water conservancy diversion Download PDFInfo
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- CN218376988U CN218376988U CN202222826556.9U CN202222826556U CN218376988U CN 218376988 U CN218376988 U CN 218376988U CN 202222826556 U CN202222826556 U CN 202222826556U CN 218376988 U CN218376988 U CN 218376988U
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Abstract
The utility model relates to a cigarette machine technical field especially relates to a structure and cigarette machine of making an uproar falls in water conservancy diversion. The utility model discloses a structure of making an uproar falls in water conservancy diversion is provided with the perforation face that sets up with the air current direction is perpendicular according to the air current direction for play certain inhibitory action to pneumatic noise, the water conservancy diversion bounding wall of both sides plays the guide air current and flows simultaneously, reduces the effect of flow resistance. And after the diversion noise reduction structure is installed on the volute, partial area can be filled, so that the whole flow field is optimized to a certain degree. Compared with the scheme that the noise reduction structure is designed on the whole periphery of the volute in the prior art, the flow performance can be improved instead of being influenced by the adoption of the local flow guide noise reduction structure.
Description
Technical Field
The utility model relates to a cigarette machine technical field especially relates to a structure and cigarette machine of making an uproar fall in water conservancy diversion.
Background
The noise of the cigarette machine is a great concern when people buy the cigarette machine. The noise of the smoke machine mainly comes from the internal vortex noise generated by the air flowing in the volute during the operation of the fan. Besides, there is noise generated outside due to the air flow moving up and down into the air inlet.
For external noise, most of them are designed with noise reduction structure at the whole lower part. For example, chinese patent No. CN202021995879.5 discloses a noise-reducing volute and a centrifugal fan, which are provided with a noise-reducing structure that is provided along an inner concave shape on an outer peripheral side of a volute shroud, and can absorb sound waves generated inside the volute and sound waves reflected outside.
However, in such a scheme of designing the noise reduction structure on the entire periphery, the flow performance is changed to a certain extent, which causes a problem of reducing the flow performance even though a certain noise reduction effect is achieved.
Utility model
The utility model aims to solve the technical problem that overcome prior art not enough and provide a structure and cigarette machine of making an uproar falls in local water conservancy diversion.
To solve the above technical problems
In a first aspect, the utility model provides a structure of making an uproar falls in water conservancy diversion, include: the noise reduction device comprises a perforated face, wherein a plurality of noise reduction perforations are distributed on the perforated face, the perforated face is perpendicular to the direction of air flow, and guide enclosing plates which are obliquely arranged are arranged on two sides of the perforated face.
Optionally, the perforated surface is provided with two surfaces, the two perforated surfaces are symmetrically arranged, the two perforated surfaces are connected into a whole, and the two perforated surfaces are in a concave shape.
Optionally, the diameter of each noise reduction perforation is 2-2.4mm, the distance between every two adjacent noise reduction perforations is S1, and S1 is 8-12mm.
Optionally, the shape of the noise reduction perforations is circular.
Optionally, the inclined angle between the perforated surface and the baffle plate is β, and β is 55-57 °.
Optionally, the perforated surface and the upper edge of the flow guiding enclosing plate are provided with a sealing enclosing plate extending upwards, and the upper edge of the sealing enclosing plate is attached to the corresponding connecting surface.
Optionally, the upper edge of the closed enclosing plate is provided with a connecting part extending outwards.
Optionally, the perforated surface, the flow guide surrounding plate and the closed surrounding plate form a semi-surrounding structure, a sheet body made of sound absorption materials is placed in the semi-surrounding structure, and the sheet body covers the perforated surface.
Optionally, the sound absorbing material is a polyurethane foam.
In a second aspect, the utility model provides a cigarette machine, it is equipped with the fan box body and sets up in the inside fan system of fan box body, and the fan system is equipped with the spiral case, and the spiral case is vertical to be set up, and the spiral case is equipped with the air outlet, and the air outlet of spiral case sets up, and foretell water conservancy diversion noise reduction structure is installed to the left side below of spiral case.
Has the beneficial effects that: the utility model discloses a structure of making an uproar falls in water conservancy diversion sets up the perforation face of perpendicular setting according to the air current direction for play certain inhibitory action to pneumatic noise, the water conservancy diversion bounding wall of both sides plays the guide air current and flows simultaneously, reduces the effect of flow resistance. After the flow guide noise reduction structure is installed on the volute, partial area can be filled, and the whole flow field is optimized to a certain degree. Compared with the scheme that the noise reduction structure is designed on the whole periphery of the volute in the prior art, the flow performance can be improved instead of influencing the flow performance by adopting the local flow guide noise reduction structure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic view of a fan box and the components inside the fan box;
FIG. 2 is a schematic view of a state in which the flow-guiding noise reduction structure is mounted on a volute (arrows in the figure indicate the flow direction of air flow);
FIG. 3 is a schematic perspective view of a flow-guiding noise-reducing structure;
FIG. 4 is a schematic top view of a flow directing and noise reducing structure;
FIG. 5 is a schematic diagram illustrating an inclined state of the baffle plate and the perforated surface in the flow-guiding noise-reducing structure;
FIG. 6 is a comparison graph of absolute velocity clouds before and after installation of the flow guiding noise reduction structure;
in the figure:
the fan comprises a perforated surface 1, a noise reduction perforation 101, a flow guide enclosing plate 2, a sealing enclosing plate 3, a connecting part 4, a sheet body 5, a fan box body 6, a volute 7, an air outlet 71 and a flow guide noise reduction structure 8.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to the structure of the fan box 6 of the range hood shown in fig. 1, a fan system is arranged in the fan box, the fan system is provided with a volute 7, the volute 7 is vertically arranged, the volute 7 is provided with an air outlet 71, the air outlet 71 of the volute 7 is arranged upwards, and a flow guiding and noise reducing structure 8 is arranged below the left side of the volute 7.
Referring to fig. 2-5, the flow guiding and noise reducing structure includes a perforated surface 1 disposed at the bottom of the flow guiding and noise reducing structure, a plurality of noise reducing perforations 101 are distributed on the perforated surface 1, the perforated surface 1 is perpendicular to the direction of the air flow, and flow guiding enclosing plates 2 are disposed on two sides of the perforated surface 1 in an inclined manner. The flow guide noise reduction structure is characterized in that a vertically arranged perforated surface 1 is arranged according to the direction of air flow based on the flow characteristics, so that certain inhibition effect on pneumatic noise is achieved, and meanwhile, the flow guide enclosing plates 2 on two sides guide the air flow to flow, and the flow resistance is reduced.
The upper half of fig. 6 is an absolute velocity cloud chart without a diversion noise reduction structure, it can be seen that there is significant airflow flow and the absolute velocity of the flow is large in the area in the circle of the upper half of fig. 6, the lower half of fig. 6 is an absolute velocity cloud chart after the main surface noise reduction diversion device is added, it can be seen from the lower half of fig. 6 that the absolute velocity of the flow area is reduced, which indicates that the partial area is filled with the diversion noise reduction structure, and the whole flow field can be optimized to a certain extent.
Referring to fig. 2-5, the perforated surface 1 at the bottom of the flow guiding and noise reducing structure is provided with two surfaces, the two perforated surfaces 1 are symmetrically arranged, and the two perforated surfaces 1 are connected into a whole, and the whole shape is concave. Through the arrangement that the two symmetrical perforated surfaces 1 are concave integrally, airflow can be further guided to flow, and the flow resistance is reduced.
The specific principle of noise reduction of the perforated surface 1 is to reduce noise by utilizing the resonance principle, and a resonance phenomenon is formed between a specific noise frequency and the perforated surface 1 with a set target frequency in a space. When resonance occurs, the oscillating sound waves violently travel back and forth in the air and out of the noise reduction perforations 101, and the sound energy of the noise is converted into friction loss in the process, so that the effect of eliminating the noise of the target frequency is achieved. The different diameters and the passing distance determine the frequency of the perforated face 1, in this embodiment the diameter of the noise reducing perforations 101 is between 2 and 2.4mm and the distance S1 between two adjacent noise reducing perforations 101 is between 8 and 12mm.
In the present embodiment, the shape of the noise reduction through hole 101 may be one of any shapes such as a circle, a square, and an ellipse. However, in this embodiment, a circular shape is preferred because the circular noise reduction through hole 101 has the simplest processing technique and has the best noise reduction effect because of no interference of edges and corners.
In this embodiment, the angle of inclination between the perforated surface 1 and the baffle plate 2 ranges from 55 to 57 ° depending on the flow characteristics. Within this range, a better guiding effect can be achieved.
In this embodiment, the last border of perforation face 1 and water conservancy diversion bounding wall 2 is equipped with the closed bounding wall 3 that upwards extends, the last border of closed bounding wall 3 is laminated with the face of being connected that corresponds, avoids the water conservancy diversion to fall and produces the gap between structure and the spiral case 7 of making an uproar.
In this embodiment, the upper edge of the enclosing wall 3 is provided with a connecting portion 4 extending outward, the flow guiding and noise reducing structure is fixed on the connecting surface of the spiral case 7 through the connecting portion 4, the connecting portion 4 is provided with a through hole, and the connecting portion 4 and the spiral case 7 can be fixed by connecting members such as rivets penetrating through the through hole.
In this embodiment, the perforated surface 1, the flow guide enclosing plate 2 and the closing enclosing plate 3 form a semi-surrounding structure, a sheet body 5 made of sound absorption material is placed in the semi-surrounding structure, and the sheet body 5 covers the perforated surface 1.
The sound absorption material mainly utilizes the porous characteristic of the material, when sound waves enter the surface of the porous material, a part of the sound waves can penetrate into the material, a part of the sound waves are reflected on the surface of the material, when the sound waves penetrating into the material are transmitted in gaps and small holes, viscous and friction effects can be generated by air movement, meanwhile, the temperature of the air in the small holes is increased when the air is compressed, and according to the heat conduction effect of the material, sound energy is gradually converted into heat energy to be consumed, so that the sound absorption effect is generated by the material. In this embodiment, polyurethane foam is preferably used as the sound absorbing material.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. The flow guiding and noise reducing structure is characterized by comprising a perforated surface (1), wherein the perforated surface (1)
A plurality of noise-reducing perforations (101) are distributed on the upper part, the perforation surface (1) is arranged perpendicular to the direction of air flow, and the perforations
Guide enclosing plates (2) which are obliquely arranged are arranged on two sides of the surface (1).
2. Flow guiding and noise reducing structure according to claim 1, characterized in that the perforated surface (1)
Is provided with two surfaces, the two surfaces of the perforated surfaces (1) are symmetrically arranged, and the two surfaces of the perforated surfaces (1) are connected into a whole and the two surfaces are
The perforation surface (1) is concave.
3. Flow guiding and noise reducing construction according to claim 1, wherein the noise reducing perforations are arranged to reduce noise
(101) Has a diameter of 2-2.4mm, the distance between two adjacent noise reduction perforations (101) is S1, and S1 is
8-12mm。
4. A flow directing and noise reducing structure according to claim 1, wherein the noise reducing perforations
(101) Is circular in shape.
5. Flow guiding and noise reducing structure according to claim 1, characterized in that the perforated surface (1)
The angle of inclination between the baffle plate (2) and the baffle plate is beta, and the beta is 55-57 degrees.
6. Flow guiding and noise reducing structure according to claim 1, wherein the perforated surface (1) is a perforated surface
The upper edge of the flow guide enclosing plate (2) is provided with a sealing enclosing plate (3) extending upwards, and the sealing enclosing plate (3)
The upper edge is attached to the corresponding connecting surface.
7. A flow directing and noise reducing structure according to claim 6, wherein the enclosing coaming is a hollow enclosure
(3) The upper edge is provided with a connecting part (4) extending outwards.
8. A flow guiding and noise reducing structure according to claim 6, characterized in that the perforated surface (1),
The diversion coaming (2) and the closing coaming (3) form a semi-surrounding structure, and the sound absorption is arranged in the semi-surrounding structure
The sheet body (5) is made of materials, and the sheet body (5) covers the perforation surface (1).
9. A flow directing and noise reducing structure according to claim 8, wherein the sound absorbing material
Is a polyurethane foam.
10. A smoke exhaust ventilator is characterized by comprising a fan box body (6) and a smoke exhaust ventilator arranged in the fan box body (6)
The fan system is internally provided with a volute (7), the volute (7) is vertically arranged, and the volute (7) is arranged
An air outlet (71) is arranged, the air outlet (71) of the volute (7) is arranged upwards, and the lower part of the left side of the volute (7)
A flow guiding and noise reducing structure according to any one of claims 1-9 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222826556.9U CN218376988U (en) | 2022-10-26 | 2022-10-26 | Structure and cigarette machine of making an uproar fall in water conservancy diversion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222826556.9U CN218376988U (en) | 2022-10-26 | 2022-10-26 | Structure and cigarette machine of making an uproar fall in water conservancy diversion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218376988U true CN218376988U (en) | 2023-01-24 |
Family
ID=84934691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222826556.9U Active CN218376988U (en) | 2022-10-26 | 2022-10-26 | Structure and cigarette machine of making an uproar fall in water conservancy diversion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218376988U (en) |
-
2022
- 2022-10-26 CN CN202222826556.9U patent/CN218376988U/en active Active
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