CN216642499U - Silencer of range hood and range hood - Google Patents
Silencer of range hood and range hood Download PDFInfo
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- CN216642499U CN216642499U CN202122658323.8U CN202122658323U CN216642499U CN 216642499 U CN216642499 U CN 216642499U CN 202122658323 U CN202122658323 U CN 202122658323U CN 216642499 U CN216642499 U CN 216642499U
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Abstract
The utility model discloses a silencer of a range hood and the range hood, wherein the silencer is arranged at an air outlet above a fan, and comprises: the silencing pipe is arranged on the pressure expanding plate and the silencing plate in the silencing pipe; the silencing plate is vertically arranged in the middle of the silencing pipe and is vertical to a rotating shaft of the fan; the pressure-expanding plate is perpendicular to the silencing plate, one end of the pressure-expanding plate is connected to the inner wall of the silencing pipe, and the other end of the pressure-expanding plate extends downwards in an inclined mode to the volute tongue of the fan volute. The inclined direction of the pressure expansion plate is matched with the air outlet direction, so that the air outlet of the fan can be rectified, the internal vortex and the backflow of the fan are reduced, and the pneumatic noise is reduced; the diffuser plate extends to the volute tongue of the fan to form a diffuser section of the fan, so that the static pressure of the fan is improved, the air outlet flow rate is reduced, the pneumatic noise is further reduced, and the pneumatic performance of the fan is improved. The vertical setting of acoustical panel can not be favorable to the air-out of fan when providing the amortization function to the air-out that hinders the fan, further ensures the aerodynamic performance of fan.
Description
Technical Field
The utility model relates to the technical field of kitchen appliances, in particular to a silencer arranged above a fan of a range hood and the range hood with the silencer.
Background
In some lampblack absorbers, especially in the lampblack absorber of big amount of wind, the air outlet department of fan top can install the muffler, has the polylith inclined arrangement's acoustical panel in the muffler, and the noise elimination material on the acoustical panel has increased the frictional resistance that the air flows, and the quantity of acoustical panel installation is more, can cut off the continuity that the air flows, forms the vortex easily in the inside of fan, blocks the outflow of air.
Therefore, although the silencing effect is increased by the silencing plates obliquely arranged in the existing silencer, the noise reduction function is provided, the pneumatic wind resistance at the air outlet of the fan is increased, especially for the silencer provided with the plurality of silencing plates, the performance of the fan is reduced, and the air performance of the range hood is greatly reduced.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the first purpose of the utility model is to provide a silencer of a range hood, which can reduce the noise of the range hood and ensure the use performance of a fan.
The utility model provides a silencer of a range hood, which is arranged at an air outlet above a fan and comprises: the silencing pipe is arranged on the pressure expanding plate and the silencing plate in the silencing pipe;
the silencing plate is vertically arranged in the middle of the silencing pipe and is vertical to a rotating shaft of the fan;
the pressure expansion plate is perpendicular to the silencing plate, one end of the pressure expansion plate is connected to the inner wall of the silencing pipe, and the other end of the pressure expansion plate extends downwards in an inclined mode to the volute tongue of the fan volute.
Further, the inner wall of amortization pipe sets up amortization subassembly, the amortization subassembly includes: the mounting plate is arranged in parallel with the inner wall of the silencing pipe, and the foaming sound-absorbing material is filled between the inner wall of the silencing pipe and the mounting plate.
Furthermore, a plurality of second silencing holes are densely distributed on the mounting plate, and silencing materials are filled in the second silencing holes.
Furthermore, two side walls of the pressure expansion plate are respectively attached to the opposite inner walls of the silencing tubes.
Furthermore, two side walls of the silencing plate are respectively attached to the opposite inner walls of the silencing pipe; or one side wall of the silencing plate is attached to the inner wall of the silencing pipe, and the other side wall of the silencing plate is attached to the surface of the pressure-expanding plate.
Furthermore, a plurality of first silencing holes are densely distributed on the silencing plate, and silencing materials are filled in the first silencing holes.
Furthermore, the inclined angle of the diffusion plate and the vertical plane form an included angle of 55-60 degrees.
Furthermore, a plurality of silencing holes are densely distributed on the pressure spreading plate, and silencing materials are filled in the silencing holes.
The silencer of the range hood of the utility model has the beneficial effects that:
the pressure expansion plate is obliquely arranged in the silencer pipe, the oblique direction of the pressure expansion plate is matched with the air outlet direction, the air outlet of the fan can be rectified, the internal vortex and the backflow of the fan are reduced, and the pneumatic noise is reduced; the diffuser plate extends to the volute tongue of the fan to form a diffuser section of the fan, and the diffuser section plays a role in speed reduction and diffusion under the condition of no wind energy impact loss, so that the static pressure of the fan is improved, the air outlet flow rate is reduced, the pneumatic noise is further reduced, and the pneumatic performance of the fan is improved. The vertical setting of acoustical panel compares in the acoustical panel and transversely or the slope setting in air outlet department, and the acoustical panel of vertical setting can not be favorable to the air-out of fan when providing the amortization function to the air-out that hinders the fan, further ensures the aerodynamic performance of fan.
The utility model also provides a range hood, comprising: the fan and the above-mentioned muffler of setting in fan top air outlet department.
Further, the other end of the diffuser plate is connected with a volute of the fan.
The range hood of the utility model has the following beneficial effects:
the range hood is provided with the silencer, so that the pneumatic noise of the fan can be reduced, the pneumatic performance is improved, and the air suction efficiency of the fan is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a simulation result of the air outlet flow before the silencer of the embodiment is installed on a fan;
fig. 2 is a schematic view of a partial structure of a range hood provided by an embodiment of the utility model;
FIG. 3 is a schematic view of a partial cross-sectional structure of a range hood according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a mounting plate in a muffler according to an embodiment of the present invention;
fig. 5 is a schematic structural view of an acoustic panel in a muffler according to an embodiment of the present invention.
Icon: 1-a silencing tube; 2, expanding the pressure plate; 3-a sound-absorbing panel; 3-1-a first silencing hole; 4, a fan; 4-1-rotation axis; 5, a volute; 6-a silencing component; 6-1-mounting plate; 6-1-the second muffling hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to more clearly explain the technical solution of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, when the silencer of this embodiment is not installed in the range hood, a flowing dead zone of large vortex backflow is formed at the volute tongue of the outlet air, the speed of this vortex is high, large pneumatic noise is caused, the pneumatic performance of the fan is seriously affected, large power loss of the fan is caused, and the air suction efficiency of the fan is affected.
In order to reduce the noise of the fan, ensure the pneumatic performance of the fan and improve the air suction efficiency of the fan, the silencer using the novel range hood is invented.
Examples
Referring to fig. 2 to 4, the present embodiment provides a silencer of a range hood, which is disposed at an air outlet above a fan 4, and includes: the silencer comprises a silencer pipe 1, a diffuser plate 2 and a silencer plate 3, wherein the diffuser plate 2 and the silencer plate 3 are arranged in the silencer pipe 1;
the silencing plate 3 is vertically arranged in the middle of the silencing pipe 1, and the silencing plate 3 is vertical to a rotating shaft 4-1 of the fan 4;
the pressure-expanding plate 2 is vertical to the silencing plate 3, one end of the pressure-expanding plate 2 is connected to the inner wall of the silencing pipe 1, and the other end of the pressure-expanding plate 2 obliquely extends downwards to the volute tongue of the fan volute 5.
In this embodiment, the air flows out the back from the afterbody of fan 4, and diffuser plate 2 sets up in the 1 interior slope of hush pipe, and the orientation and the air-out direction of diffuser plate 2 slope coincide, can carry out the rectification to the air-out of fan 4, and the air-out flows along diffuser plate, reduces the inside vortex and the backward flow of fan 4, has reduced pneumatic noise.
The diffuser plate extends to the volute tongue of the fan, completely isolates a flow dead zone, prevents backflow at the volute tongue and improves the pneumatic performance of the fan 4.
The air outlet channel from the volute tongue to the air outlet of the silencer forms a diffusion section of the fan 4, and according to the Bernoulli equation, the air flow speed of the diffusion section is reduced, and the static pressure is increased. Static pressure grow makes the muffler can overcome bigger resistance and is fit for the floor condition of difference, has stronger commonality. Since aerodynamic noise and velocity are in a power of 5 or 6, a reduction in the velocity of the air flow results in a substantial reduction in aerodynamic noise.
The vertical setting of acoustical panel compares in the acoustical panel and transversely or the slope setting in air outlet department, and the acoustical panel of vertical setting can not be favorable to the air-out of fan when providing the amortization function to the air-out that hinders the fan, further ensures the aerodynamic performance of fan.
It should be noted that the cross section of the sound attenuation tube 1 in this embodiment is rectangular.
In the present embodiment, the inner wall of the silencer pipe 1 is provided with a silencer assembly 6, and referring to fig. 3, the silencer assembly 6 includes: the mounting plate 6-1 is arranged in parallel with the inner wall of the silencing pipe 1, and the foaming sound-absorbing material is filled between the inner wall of the silencing pipe 1 and the mounting plate 6-1.
When the airflow flows into the silencing pipe 1, the silencing assembly 6 is arranged to enable the silencer to have better silencing effect.
Preferably, a plurality of second silencing holes 6-1-1 are densely distributed on the mounting plate 6-1, and silencing materials are filled in the second silencing holes 6-1-1. In this embodiment, the silencing material filled in the second silencing hole 6-1-1 is glass fiber.
The second silencing hole 6-1-1 is formed in the mounting plate 6-1, and silencing materials are filled in the second silencing hole 6-1-1, so that the silencing performance and the noise reduction performance of the silencing component 6 can be improved.
In the present embodiment, both side walls of the diffuser plate 2 are respectively attached to the opposite inner walls of the silencer duct 1. Two side walls of the silencing plate 3 are respectively attached to the opposite inner walls of the silencing tube 1, namely the diffusion plate 2 and the silencing plate 3 are intersected.
In another embodiment of the present invention, one side wall of the silencer plate 3 is bonded to the inner wall of the silencer duct 1, and the other side wall of the silencer plate 3 is bonded to the surface of the diffuser plate 2. That is, the other side wall of the sound-deadening plate 3 is inclined.
In actual use, one skilled in the art can determine that the sound-absorbing plate 3 adopts one of the above structures according to the difficulty of machining and installation.
Preferably, a plurality of first silencing holes 3-1 are densely distributed on the silencing plate 3, and silencing materials are filled in the first silencing holes 3-1. In this embodiment, the material filled in the first muffling hole 3-1 is glass fiber.
The sound-deadening material in the first sound-deadening hole 3-1 can further improve the sound-deadening and noise-reducing performance of the sound-deadening plate 3.
In this embodiment, the diffuser plate 2 is inclined at an angle of 55 ° to 60 ° from the vertical plane.
The inclination angle of the pressure expansion plate is determined according to the simulation result of the air outlet flow of the fan in fig. 1, so that the large vortex backflow at the volute tongue is eliminated, the working efficiency of the fan is improved, and the power loss of the fan is reduced to the minimum.
Preferably, the diffuser plate 2 is inclined at an angle of 58 ° to the vertical plane.
In this embodiment, the diffuser plate 2 is densely provided with a plurality of muffling holes, and the muffling holes are filled with a muffling material. The sound attenuating material of this embodiment may be fiberglass.
When the air current flows along diffuser 2, the downthehole amortization material of diffuser 2 amortization can carry out preliminary amortization to the air current and fall and make an uproar, and when the air current flowed in hush pipe 1, provided main amortization by amortization subassembly 6 and acoustical panel 3 and fallen the function of making an uproar.
It should be noted that, referring to fig. 2 to 3, in the present embodiment, one end of the diffuser plate 2 is connected to the upper edge of the silencer duct 1. In other embodiments of the present invention, one end of the diffuser plate 2 may be connected to the middle or lower portion of the muffler pipe 1, and in this case, the structure of the muffler plate 3 may be as shown in fig. 5, and the inclined surface portion of the other side wall of the muffler plate 3 is attached to the surface of the diffuser plate 2.
In a preferred embodiment, the sound-absorbing plate 3 is placed in the middle of the sound-absorbing pipe 1, the plane of the sound-absorbing plate 3 and the central disc of the fan 4 is in the middle of the axial direction of the fan 4, and the sound-absorbing plate 3 arranged in the middle of the sound-absorbing pipe 1 can further improve the aerodynamic performance at the outlet of the fan 4 because the central disc does not do work.
This embodiment also provides a lampblack absorber, includes: fan 4 and the muffler of this embodiment of air outlet department of setting above fan 4.
This lampblack absorber installs the muffler of this embodiment, when can reduce the pneumatic noise of fan, improves pneumatic performance, improves the efficiency of induced drafting of fan.
In the lampblack absorber of this embodiment, the diffuser 2 other end can be connected with 4 volutes of fan 5, guarantees the continuity of lampblack absorber air-out, further ensures the induced draft efficiency of fan.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a muffler of lampblack absorber, sets up the air outlet department in fan (4) top, its characterized in that includes: the silencer comprises a silencer pipe (1), a pressure expanding plate (2) and a silencer plate (3) which are arranged in the silencer pipe (1);
the silencing plate (3) is vertically arranged in the middle of the silencing pipe (1), and the silencing plate (3) is perpendicular to a rotating shaft (4-1) of the fan (4);
the pressure expansion plate (2) is perpendicular to the sound-absorbing plate (3), one end of the pressure expansion plate (2) is connected to the inner wall of the sound-absorbing pipe (1), and the other end of the pressure expansion plate (2) extends downwards to the volute tongue of the fan volute (5) in an inclined mode.
2. A silencer according to claim 1, characterized in that the inner wall of the silencer duct (1) is provided with a silencer assembly (6), which silencer assembly (6) comprises: the mounting plate (6-1) is arranged in parallel with the inner wall of the silencing pipe (1), and the foaming sound-absorbing material is filled between the inner wall of the silencing pipe (1) and the mounting plate (6-1).
3. A silencer according to claim 2, characterized in that the mounting plate (6-1) is densely covered with a plurality of second silencing holes (6-1-1), and the second silencing holes (6-1-1) are filled with silencing material.
4. A silencer according to claim 1, characterized in that the two side walls of the diffuser plate (2) are respectively attached to the opposite inner walls of the silencer duct (1).
5. A silencer according to claim 4, characterized in that the two side walls of the silencing plate (3) are respectively attached to the opposite inner walls of the silencing tube (1); or one side wall of the sound-absorbing plate (3) is attached to the inner wall of the sound-absorbing pipe (1), and the other side wall of the sound-absorbing plate (3) is attached to the surface of the pressure-expanding plate (2).
6. A silencer according to claim 1 or 5, characterized in that the silencing plate (3) is densely distributed with a plurality of first silencing holes (3-1), and the first silencing holes (3-1) are filled with silencing material.
7. A silencer according to claim 1 or 4, characterized in that the diffuser plate (2) is inclined at an angle of 55-60 ° to the vertical plane.
8. A silencer according to claim 7, characterized in that the diffuser plate (2) is densely populated with silencing holes filled with silencing material.
9. A range hood, comprising: a fan (4) and a silencer according to any of claims 1-8 arranged at an air outlet above the fan (4).
10. A range hood according to claim 9, characterized in that the other end of the pressure expansion plate (2) is connected with the volute (5) of the fan (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122658323.8U CN216642499U (en) | 2021-11-02 | 2021-11-02 | Silencer of range hood and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122658323.8U CN216642499U (en) | 2021-11-02 | 2021-11-02 | Silencer of range hood and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216642499U true CN216642499U (en) | 2022-05-31 |
Family
ID=81733705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122658323.8U Active CN216642499U (en) | 2021-11-02 | 2021-11-02 | Silencer of range hood and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216642499U (en) |
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2021
- 2021-11-02 CN CN202122658323.8U patent/CN216642499U/en active Active
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