CN219223220U - Noise reduction air duct structure and dryer - Google Patents
Noise reduction air duct structure and dryer Download PDFInfo
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- CN219223220U CN219223220U CN202223028037.4U CN202223028037U CN219223220U CN 219223220 U CN219223220 U CN 219223220U CN 202223028037 U CN202223028037 U CN 202223028037U CN 219223220 U CN219223220 U CN 219223220U
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Abstract
The utility model relates to the technical field of noise reduction, in particular to a noise reduction air duct structure and a dryer, and aims to solve the problems that in the use process of the existing dryer provided with two independent air ducts, air flow velocity in the two air ducts is different, so that air flow difference exists to generate pneumatic noise, and the surrounding environment and the health of staff are affected. The noise reduction air duct structure comprises a first air duct, a second air duct and an air outlet, wherein the first air duct is fixed at the top end or the bottom end of the second air duct, the interior of the first air duct is communicated with the interior of the second air duct to form a first communication area, and air flow in the first air duct and air flow in the second air duct are converged through the first communication area to form backward step flow and then are discharged from the air outlet. The utility model can form backward step flow, namely vortex, thereby reducing the flow speed of wind flow and further reducing pneumatic noise.
Description
Technical Field
The utility model relates to the technical field of noise reduction, and particularly provides a noise reduction air duct structure and a dryer.
Background
Under the action of the draught fan, fresh cold air outside the dryer is directly subjected to heat exchange with the heater through the air inlet to become dry hot air, and the hot air is conveyed into the dryer to dry materials in the dryer.
The main source of dryer noise is pneumatic noise, which is proportional to the machine air flow, with greater air flow generally meaning higher machine drying speed and drying efficiency. In order to improve the drying efficiency, a double fan is installed on some dryers, each fan corresponds to one air channel, in order to save the installation space of the fan and the air channels, the two air channels are stacked up and down and separated by a partition plate, an air inlet is formed in each air channel, and the fan is installed on the air inlet, as shown in fig. 1. Under the condition that the gas flow rate is the same in the two air channels, the flow velocity of the wind flow in the two air channels is different due to the fact that the lengths of the two air channels are different. In the using process of the dryer provided with two independent air channels with different lengths, when the difference of the air flow velocity of the two sides of the partition plate is large, obvious pneumatic noise can be caused, and the surrounding environment and the health of staff are affected.
Accordingly, the utility model provides a novel noise reduction air duct structure to solve the technical problems.
Disclosure of Invention
The utility model aims to solve the technical problems that in the use process of the existing dryer provided with two independent air channels, the air flow difference exists due to different air flow rates in the two air channels, and obvious pneumatic noise is generated when the air flow difference is large, so that the surrounding environment and the health of staff are influenced.
For this purpose, in a first aspect, the present utility model provides a noise reduction air duct structure, where the noise reduction air duct structure includes a first air duct, a second air duct, and an air outlet, where the first air duct is fixed at a top end or a bottom end of the second air duct, air inlets are provided on the first air duct and the second air duct, one ends of the first air duct and the second air duct are connected to the air outlet, the interior of the first air duct is communicated with the interior of the second air duct and forms a first communication area, and air flows in the first air duct and air flows in the second air duct are converged through the first communication area and form a backward step flow, and then are discharged from the air outlet.
Under the condition of adopting the technical scheme, wind flows in the first air duct and the second air duct are converged in the first communication area and form backward step flow, vortex is formed actually due to the characteristic of fluid viscosity force, and therefore the flow speed of the wind flows is reduced.
In a specific embodiment of the noise reduction air duct structure, the length of the first air duct is smaller than the length of the second air duct.
In a specific embodiment of the noise reduction air duct structure, a first step is formed on a side wall of one end, away from the air outlet, of the first air duct, relative to the second air duct, and a region between the first step and the air outlet is the first communication region.
Under the condition of adopting the technical scheme, the vortex can be formed at the first step when the wind flow in the first air duct and the wind flow in the second air duct are converged in the first communication area, the backward step flow can be formed, the flow speed is reduced, and the reduction function of pneumatic noise is realized.
In a specific embodiment of the noise reduction air duct structure, the air inlets on the first air duct and the second air duct are located on the same side, and the air inlets are used for installing fans.
In a specific embodiment of the noise reduction air duct structure, the air inlet is located on a side wall of one end, away from the air outlet, of the first air duct and the second air duct.
In a specific embodiment of the noise reduction air duct structure, the noise reduction air duct structure further includes a third air duct, the third air duct is fixed on the first air duct in a stacked manner, one end of the third air duct is connected with the air outlet, the inside of the third air duct is communicated with the first communication area and forms a second communication area, and air flow in the first communication area passes through the second communication area to form secondary backward step flow and is discharged from the air outlet.
Under the condition of adopting the technical scheme, the air flow of the first communication area forms vortex again at the second step part in the flowing process of the air outlet direction, so that the purpose of secondarily reducing the flow speed is realized, and further the reduction of the pneumatic noise is realized.
In a specific embodiment of the above noise reduction air duct structure, a length of the third air duct is smaller than a length of the first air duct.
In a specific embodiment of the noise reduction air duct structure, a second step is formed on the other end side wall of the third air duct opposite to the first air duct, and a region between the second step and the air outlet is the second communication region.
In a specific embodiment of the noise reduction air duct structure, the bottom ends of the third air duct and the first air duct are of an opening structure, a first communication port is formed in a position, corresponding to the bottom end of the first air duct, of the top end of the second air duct, so that the second air duct is communicated with the first air duct, and a second communication port is formed in a position, corresponding to the bottom end of the third air duct, of the top end of the first air duct, so that the first air duct is communicated with the third air duct.
In a second aspect, the present utility model further provides a dryer, on which the noise reduction duct structure described in any one of the above technical solutions is mounted.
Drawings
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a prior art installation of two independent air ducts;
FIG. 2 is a schematic diagram of a noise reduction duct structure provided by the present utility model;
FIG. 3 is a schematic view of a three duct installation configuration.
List of reference numerals:
1. a first air duct; 2. a second air duct; 3. a first step; 4. a third air duct; 5. a second step; 6. and an air outlet.
Detailed Description
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art can adapt it as desired to suit a particular application.
It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "inner," "outer," "front," "rear," and the like indicate directional or positional relationships, and are based on the directional or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the ordinal terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 2, the present utility model provides a noise reduction air duct structure, which includes a first air duct 1, a second air duct 2 and an air outlet 6, wherein the first air duct 1 is fixed at the top end or the bottom end of the second air duct 2, air inlets (the air inlets are not shown in the drawing) are respectively arranged on the first air duct 1 and the second air duct 2, one ends of the first air duct 1 and the second air duct 2 are respectively connected with the air outlet 6, the interior of the first air duct 1 is communicated with the interior of the second air duct 2 to form a first communication area, and the air flow in the first air duct 1 and the air flow in the second air duct 2 are converged through the first communication area to form a backward step flow and then are discharged from the air outlet 6.
The wind flows in the first wind channel 1 and the second wind channel 2 are converged in the first communication area and form backward step flow, and swirl is formed actually due to the characteristic of fluid viscosity force, so that the flow speed of the wind flow is reduced. Compared with two independent air channels in the prior art, the air flow speed is reduced, so that the pneumatic noise is reduced.
Specifically, the air inlets on the first air duct 1 and the second air duct 2 are located on the same side, for example, the air inlets are located at one end of the front side walls of the first air duct 1 and the second air duct 2, which is far away from the air outlet 6, or the air inlets are located at one end of the rear side walls of the first air duct 1 and the second air duct 2, which is far away from the air outlet 6, and the air inlets are used for installing fans. The length of the first air channel 1 is smaller than that of the second air channel 2, a first step 3 is formed on the side wall of one end, far away from the air outlet 6, of the first air channel 1 relative to the second air channel 2, and a first communication area is formed in an area between the first step 3 and the air outlet 6.
Because the lengths of the first air duct 1 and the second air duct 2 are different, under the condition of the same gas flow, the flow velocity of the wind flow when the first communication areas are converged is different, and the flow velocity of the wind flow in the first air duct 1 is larger than that in the second air duct 2. The wind flow in the second air duct 2 is swirled at the first step 3, so that the flow speed of the wind flow is reduced, and the pneumatic noise is reduced.
In the above description, the wind flow in the first air duct 1 and the wind flow in the second air duct 2 are converged in the first communication area, and the vortex is formed at the first step 3, so that the backward step flow can be formed, the flow speed is reduced, and the reduction function of the aerodynamic noise is realized.
Referring to fig. 3, the noise reduction air duct structure further includes a third air duct 4, where the third air duct 4 is fixed on the first air duct 1 in a stacked manner, specifically, when the first air duct 1 is fixed on the top end of the second air duct 2, the third air duct 4 is fixed on the top end of the first air duct 1; when the first air duct 1 is fixed at the bottom end of the second air duct 2, the third air duct 4 is fixed at the bottom end of the first air duct 1; one end of the third air duct 4 is connected with the air outlet 6, the interior of the third air duct 4 is communicated with the first communication area and forms a second communication area, and the air flow in the first communication area passes through the second communication area to form secondary backward step flow and is discharged from the air outlet 6.
Specifically, the length of the third air duct 4 is smaller than that of the first air duct 1, a second step 5 is formed on the side wall of the other end of the third air duct 4 opposite to the first air duct 1, and a region between the second step 5 and the air outlet 6 is a second communication region. The first step 3 and the second step 5 are arranged in sequence according to the wind flow direction, and a gap is arranged between the first step 3 and the second step 5. In the process of flowing in the direction of the air outlet 6, the air flow in the first communication area forms vortex again at the position of the second step 5, so that the purpose of secondarily reducing the flow speed is realized, and further the reduction of pneumatic noise is realized.
It will be understood by those skilled in the art that the number of the third air channels 4 is not limited, and the number of the third air channels 4 may be one, two or more, and is set according to the installation space, when the number of the third air channels 4 is plural, the third air channels 4 are all in a stacked state, and the lengths of the plurality of third air channels 4 are different, and gradually change according to the stacking order, for example, when the first air channel 1 is fixed at the top end of the second air channel 2, the lengths of the plurality of third air channels 4 gradually shorten from bottom to top; when the first air duct 1 is fixed at the bottom end of the second air duct 2, the lengths of the plurality of third air ducts 4 become shorter gradually from top to bottom. The steps are formed in a stacking mode, the third air channels 4 are communicated with each other and the first communication area to form a plurality of communication areas, and wind flow in the first communication area forms multiple vortex through the steps so as to perform multistage speed reduction, so that the purpose of reducing pneumatic noise is achieved. Compared with single-stage speed reduction, the speed reduction of the wind flow is larger in pneumatic noise reduction and smaller in noise through multi-stage speed reduction.
In this embodiment, the bottom ends of the third air duct 4 and the first air duct 1 are both in an opening structure, and a first communication port is formed at a position corresponding to the bottom end of the first air duct 1 at the top end of the second air duct 2, so that the second air duct 2 is communicated with the first air duct 1, thereby forming a first communication area, and a second communication port is formed at a position corresponding to the bottom end of the third air duct 4 at the top end of the first air duct 1, so that the first air duct 1 is communicated with the third air duct 4, thereby forming a second communication area.
In addition, the utility model also provides a dryer, and the dryer is provided with the noise reduction air duct structure described in any one of the above.
Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.
Claims (10)
1. The utility model provides a fall wind channel structure of making an uproar, its characterized in that falls wind channel structure of making an uproar includes first wind channel, second wind channel and air outlet, first wind channel is fixed the top or the bottom in second wind channel, first wind channel with all be provided with the air intake on the second wind channel, first wind channel with the one end in second wind channel is all connected the air outlet, the inside in first wind channel with the inside intercommunication in second wind channel forms first communication area, the wind flow in the first wind channel with the wind flow in the second wind channel passes through behind the first communication area gathers and forms backward step flow follow the air outlet discharges.
2. The noise reduction air duct structure of claim 1, wherein a length of the first air duct is less than a length of the second air duct.
3. The noise reduction air duct structure according to claim 2, wherein a side wall of one end of the first air duct far away from the air outlet forms a first step relative to the second air duct, and a region between the first step and the air outlet is the first communication region.
4. The noise reduction duct structure of claim 1, wherein the air inlets on the first duct and the second duct are on the same side, the air inlets being for mounting fans.
5. The noise reduction duct structure of claim 4, wherein the air inlet is located on a sidewall of an end of the first duct and the second duct remote from the air outlet.
6. The noise reduction air duct structure according to claim 1, further comprising a third air duct, the third air duct being secured to the first air duct in a stacked manner, one end of the third air duct being connected to the air outlet, an interior of the third air duct being in communication with the first communication area and forming a second communication area, the air flow in the first communication area passing through the second communication area to form a secondary backward step flow and being discharged from the air outlet.
7. The noise reduction air duct structure of claim 6, wherein a length of the third air duct is less than a length of the first air duct.
8. The noise reduction air duct structure according to claim 7, wherein a second step is formed on the other end side wall of the third air duct with respect to the first air duct, and a region between the second step and the air outlet is the second communication region.
9. The noise reduction air duct structure according to claim 8, wherein the bottom ends of the third air duct and the first air duct are both of an opening structure, a first communication port is formed at a position corresponding to the bottom end of the first air duct at the top end of the second air duct so that the second air duct is communicated with the first air duct, and a second communication port is formed at a position corresponding to the bottom end of the third air duct at the top end of the first air duct so that the first air duct is communicated with the third air duct.
10. A dryer on which the noise reduction duct structure of any one of claims 1 to 9 is mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223028037.4U CN219223220U (en) | 2022-11-14 | 2022-11-14 | Noise reduction air duct structure and dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223028037.4U CN219223220U (en) | 2022-11-14 | 2022-11-14 | Noise reduction air duct structure and dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219223220U true CN219223220U (en) | 2023-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223028037.4U Active CN219223220U (en) | 2022-11-14 | 2022-11-14 | Noise reduction air duct structure and dryer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219223220U (en) |
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- 2022-11-14 CN CN202223028037.4U patent/CN219223220U/en active Active
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