CN211901076U - Noise reduction volute tongue structure of cross flow fan - Google Patents
Noise reduction volute tongue structure of cross flow fan Download PDFInfo
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- CN211901076U CN211901076U CN202020430975.9U CN202020430975U CN211901076U CN 211901076 U CN211901076 U CN 211901076U CN 202020430975 U CN202020430975 U CN 202020430975U CN 211901076 U CN211901076 U CN 211901076U
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- volute tongue
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Abstract
The utility model relates to a cross-flow fan's worm tongue structure of making an uproar falls. The volute tongue is of a double-layer structure and comprises an inner layer part and an outer layer part which are in contact with air flow, a gap is reserved between the inner layer part and the outer layer part, and a noise reduction hole is formed in the inner layer part. The utility model has the advantages of simple and reasonable structure, through the design of the snail tongue after the improvement, absorbed near the gaseous ability of snail tongue, weakened near the speed pulsation of snail tongue to noise cancelling effect of making an uproar is better.
Description
Technical Field
The utility model relates to a volute tongue structure of cross-flow fan, especially a volute tongue structure of making an uproar falls of cross-flow fan.
Background
The cross-flow fan rotates through an impeller in the fan, airflow enters a blade grid from the open position of the impeller, passes through the interior of the impeller and is discharged into a volute from the position of the blade grid on the other side to form working airflow. The center of the working air flow is near the volute tongue, the air at the volute tongue can generate periodic pressure and speed pulsation, high rotation noise is generated, and the high rotation noise can form an inaudible squeal noise to pollute the environment.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a noise reduction volute tongue structure for a cross-flow fan, which reduces the noise sharpness without increasing the overall noise level.
The above purpose is realized by the following technical scheme:
the volute tongue structure comprises a volute tongue arranged on a volute, the volute tongue is of a double-layer structure and comprises an inner layer portion and an outer layer portion, the inner layer portion is in contact with air flow, a gap is reserved between the inner layer portion and the outer layer portion, and a noise reduction hole is formed in the inner layer portion.
The technical scheme can be further improved by the following measures:
and an arc connecting part is arranged between the outer layer part and the inner layer part.
The inner layer part and the outer layer part are both in an L-shaped bent shape, and a noise reduction hole is formed in the bent part of the inner layer part.
The noise reduction hole is a circular through hole.
The above technical measures can be used alternatively or in combination as long as they do not conflict with each other.
The utility model has the advantages of simple and reasonable structure, through the design of the snail tongue after the improvement, absorbed near the gaseous ability of snail tongue, weakened near the speed pulsation of snail tongue to noise cancelling effect of making an uproar is better.
Drawings
Fig. 1 is a perspective view of a volute tongue provided by the present invention;
FIG. 2 is a front view of the volute tongue of FIG. 1;
FIG. 3 is a left side view of the volute tongue of FIG. 1;
FIG. 4 is a bottom view of the volute tongue of FIG. 1;
fig. 5 is a perspective view of the spiral casing according to the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The noise reduction volute tongue structure of the cross flow fan comprises a volute tongue 2 arranged on a volute casing 1, wherein the volute tongue 2 is of a double-layer structure and comprises an inner layer portion 21 and an outer layer portion 22, the inner layer portion is in contact with air flow, a gap 23 is reserved between the inner layer portion and the outer layer portion, and a noise reduction hole 24 is formed in the inner layer portion.
An arc connecting part 25 is arranged between the outer layer part and the inner layer part.
The inner layer part and the outer layer part are both in L-shaped bent shapes, and a bent part 26 of the inner layer part is provided with a noise reduction hole.
The noise reduction hole is a circular through hole.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. Furthermore, the technical features mentioned in the embodiments of the present invention may be combined with each other as long as they do not conflict with each other.
Claims (4)
1. The utility model provides a cross-flow fan's spiral shell tongue structure of making an uproar falls, is including setting up the spiral shell tongue on the spiral shell, its characterized in that: the volute tongue is of a double-layer structure and comprises an inner layer part and an outer layer part which are in contact with air flow, a gap is reserved between the inner layer part and the outer layer part, and a noise reduction hole is formed in the inner layer part.
2. The noise reduction volute tongue structure of the crossflow blower of claim 1, wherein: and an arc connecting part is arranged between the outer layer part and the inner layer part.
3. The noise reduction volute tongue structure of the crossflow blower of claim 1, wherein: the inner layer part and the outer layer part are both in an L-shaped bent shape, and a noise reduction hole is formed in the bent part of the inner layer part.
4. The noise reduction volute tongue structure of the crossflow blower of claim 1, wherein: the noise reduction hole is a circular through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020430975.9U CN211901076U (en) | 2020-03-28 | 2020-03-28 | Noise reduction volute tongue structure of cross flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020430975.9U CN211901076U (en) | 2020-03-28 | 2020-03-28 | Noise reduction volute tongue structure of cross flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211901076U true CN211901076U (en) | 2020-11-10 |
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ID=73275864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020430975.9U Active CN211901076U (en) | 2020-03-28 | 2020-03-28 | Noise reduction volute tongue structure of cross flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211901076U (en) |
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2020
- 2020-03-28 CN CN202020430975.9U patent/CN211901076U/en active Active
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