Volute structure and fan with same

Abstract

This invention provides a volute structure and a fan having the same. The volute structure includes: a shell body with an air outlet, the shell body comprising a first plate, a second plate, and a curved plate, the first plate and the second plate being opposite to and parallel to each other, and connected by the curved plate to give the shell body a helical inner cavity; a volute tongue including a front end and a middle part connected to the front end, the middle part being connected to the curved plate through the front end; wherein, the cross-section of the portion connecting the curved plate and the front end of the volute tongue forms an angle A with the surface of the middle part of the volute tongue facing the air outlet, the angle A satisfying: 43°≤A≤75°. This invention effectively solves the problems of poor airflow and high noise in existing volute structures.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and more specifically, to a volute structure and a wind turbine having the same. Background Technology

[0002] Currently, traditional fan casings are all of ordinary streamlined structure, and the air outlet is usually a tangential transition structure.

[0003] However, the above-mentioned design of the air outlet often leads to poor airflow from the volute structure, resulting in a reduced airflow volume and increased noise, which in turn affects the user experience. Summary of the Invention

[0004] The main objective of this invention is to provide a volute structure and a fan having the same, so as to solve the problems of poor airflow and high noise in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a volute structure is provided, comprising: a shell body having an air outlet, the shell body including a first plate, a second plate, and a curved plate, the first plate and the second plate being disposed opposite to each other and parallel to each other, the first plate and the second plate being connected by the curved plate to give the shell body a spiral inner cavity; a volute tongue including a front end of the volute tongue and a middle part of the volute tongue connected to the front end of the volute tongue, the middle part of the volute tongue being connected to the curved plate through the front end of the volute tongue; wherein, the cross surface of the portion of the curved plate and the front end of the volute tongue is set at an angle A with the surface of the middle part of the volute tongue facing the air outlet, the angle A satisfying: 43°≤A≤75°.

[0006] Furthermore, the front end of the volute tongue is a curved plate structure, the middle part of the volute tongue is a flat plate structure, and the outer wall surface of the front end of the volute tongue is tangent to the outer wall surface of the curved plate body.

[0007] Furthermore, the volute structure also includes a noise reduction component disposed on the front end of the volute tongue. The noise reduction component has a toothed portion, which is disposed toward the side away from the front end of the volute tongue.

[0008] Furthermore, the noise reduction component is snapped, glued, or connected to the front end of the volute tongue via fasteners.

[0009] Furthermore, there is one noise reduction component, which extends along a first preset direction so that the noise reduction component is tangent to the front end of the volute tongue; wherein, the first preset direction extends radially along the curved panel body.

[0010] Furthermore, there are multiple noise reduction components, each extending along a first preset direction so that each noise reduction component is tangent to the front end of the volute tongue, and the multiple noise reduction components are spaced apart along a second preset direction; wherein, the first preset direction extends radially along the curved panel body, and the second preset direction is the thickness direction of the volute structure.

[0011] Furthermore, the noise reduction component has multiple toothed portions, which are spaced apart along the extending direction of the noise reduction component.

[0012] Furthermore, the tooth apex angle C of the tooth-like portion satisfies: 15°≤C≤30°.

[0013] Furthermore, the volute tongue also includes: a rear end of the volute tongue, which is connected to the middle part of the volute tongue; the rear end of the volute tongue is connected to the front end of the volute tongue through the middle part of the volute tongue; the rear end of the volute tongue is a flat plate structure; and the rear end of the volute tongue and the middle part of the volute tongue are set at a preset angle.

[0014] According to another aspect of the present invention, a fan is provided, including a volute structure and a fan blade disposed within the volute structure; wherein the volute structure is the aforementioned volute structure.

[0015] The volute structure of this invention includes a shell body and a volute tongue. The shell body has an air outlet and includes a first plate, a second plate, and a curved plate. The first and second plates are opposite to each other and parallel to each other, connected by the curved plate to create a spiral inner cavity. The volute tongue includes a front end and a middle portion connected to the front end. The middle portion is connected to the curved plate via the front end. The cross-section of the curved plate connecting to the front end and the surface of the middle portion facing the air outlet forms an angle A, where A satisfies 43°≤A≤75°. Thus, during the process of the volute structure guiding the air blown out by the fan blades, the aforementioned angle between the cross-section of the curved plate connecting to the front end and the surface of the middle portion facing the air outlet increases the airflow of the volute structure and reduces noise. This effectively solves the problems of poor airflow and high noise in existing volute structures, improving the working efficiency of the volute structure and enhancing the user experience. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A cross-sectional view of an embodiment of the volute structure according to the present invention is shown; and

[0018] Figure 2 It shows Figure 1 Enlarged schematic diagram of point B in the volute structure.

[0019] The above figures include the following reference numerals:

[0020] 10. Housing body; 11. Air outlet; 12. Curved panel body; 13. Spiral inner cavity; 20. Volute tongue; 21. Front end of volute tongue; 22. Middle part of volute tongue; 23. Rear end of volute tongue; 30. Noise reduction component; 31. Toothed part. Detailed Implementation

[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] In this invention, unless otherwise stated, directional terms such as "up" and "down" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0024] To address the problems of poor airflow and excessive noise generated by the volute structure in the prior art, this application provides a volute structure and a fan having the same.

[0025] like Figure 1 As shown, the volute structure includes a housing body 10 and a volute tongue 20. The housing body 10 has an air outlet 11 and includes a first plate, a second plate, and a curved plate 12. The first plate and the second plate are arranged opposite to each other and parallel to each other. The first plate and the second plate are connected by the curved plate 12, so that the housing body 10 has a spiral inner cavity 13. The volute tongue 20 includes a volute tongue front end 21 and a volute tongue middle part 22 connected to the volute tongue front end 21. The volute tongue middle part 22 is connected to the curved plate 12 through the volute tongue front end 21. The cross-section of the portion of the curved plate 12 connected to the volute tongue front end 21 is set at an angle A with the surface of the volute tongue middle part 22 facing the air outlet 11, and the included angle A satisfies: 43°≤A≤75°.

[0026] Applying the technical solution of this embodiment, the volute structure includes a housing body 10 and a volute tongue 20. The housing body 10 has an air outlet 11 and includes a first plate, a second plate, and a curved plate 12. The first plate and the second plate are arranged opposite to each other and parallel to each other. The first plate and the second plate are connected by the curved plate 12, so that the housing body 10 has a spiral inner cavity 13. The volute tongue 20 includes a volute tongue front end 21 and a volute tongue middle portion 22 connected to the volute tongue front end 21. The volute tongue middle portion 22 is connected to the curved plate 12 through the volute tongue front end 21. The cross-section of the portion of the curved plate 12 connected to the volute tongue front end 21 forms an angle A with the surface of the volute tongue middle portion 22 facing the air outlet 11, where the angle A satisfies: 43°≤A≤75°. In this way, during the process of the volute structure guiding the gas blown out by the fan blades, the angle between the cross-section of the curved panel 12 and the front end 21 of the volute tongue and the surface of the middle part 22 of the volute tongue facing the air outlet 11 can increase the air volume of the volute structure and reduce the air noise. This effectively solves the problem of uneven air flow and high noise in the volute structure in the prior art, improves the working efficiency of the volute structure, and also enhances the user experience.

[0027] In this embodiment, if the included angle A is too large, it can easily cause the fan to produce noticeable noise at a certain speed. If the included angle A is too small, it will cause the flow lines of the volute tongue to be too sharp, resulting in air backflow and turbulence, which will eventually cause the volute structure to surge and produce noise, affecting the service life of the volute structure.

[0028] like Figure 1 As shown, the front end 21 of the volute tongue is a curved plate structure, and the middle part 22 of the volute tongue is a flat plate structure. The outer wall surface of the front end 21 of the volute tongue is tangent to the outer wall surface of the curved plate body 12. This arrangement allows for smoother airflow within the volute structure, preventing blockages and avoiding turbulence or backflow at the connection between the front end 21 of the volute tongue and the curved plate body 12, which could cause vibration and noise in the volute structure. It also increases the airflow volume of the volute structure. Furthermore, the structure is simple, easy to manufacture and implement, and reduces the manufacturing cost of the volute structure.

[0029] In this embodiment, the front end 21 of the volute tongue is externally tangent to the curved panel 12, which makes the airflow at the connection between the two smoother, increases the air volume of the air outlet 11 of the volute structure, and improves the working efficiency of the volute structure.

[0030] like Figure 1 and Figure 2As shown, the volute structure also includes a noise reduction component 30. The noise reduction component 30 is disposed on the front end 21 of the volute tongue, and has a toothed portion 31 facing away from the front end 21 of the volute tongue. Thus, by adding the noise reduction component 30 to the front end 21 of the volute tongue, the noise at the connection between the volute tongue 20 and the curved panel body 12 is further improved, reducing noise and vibration of the volute structure during use and enhancing the user experience.

[0031] Optionally, the noise reduction component 30 is snapped onto, glued to, or connected to the front end 21 of the volute tongue by fasteners. In this embodiment, the noise reduction component 30 is glued to the front end 21 of the volute tongue. This arrangement makes the assembly of the noise reduction component 30 and the front end 21 of the volute tongue easier and simpler, reducing assembly difficulty and thus reducing the workload of workers.

[0032] In this embodiment, there is one noise reduction component 30, which extends along a first preset direction so that it is tangent to the front end 21 of the volute tongue. The first preset direction extends radially along the curved panel body 12. Specifically, the noise reduction component 30 is tangent to the surface of the front end 21 of the volute tongue facing the air outlet 11, thereby reducing the resistance of the noise reduction component 30 to the airflow while reducing airflow noise, making the airflow within the volute structure smoother and increasing the airflow volume of the volute structure.

[0033] In other embodiments not shown in the accompanying drawings, multiple noise-reducing components are used, each extending along a first preset direction to be tangent to the front end of the volute tongue. These multiple noise-reducing components are spaced apart along a second preset direction. The first preset direction extends radially along the curved panel, and the second preset direction is the thickness direction of the volute structure. This arrangement of multiple noise-reducing components further reduces the noise and vibration generated by the volute structure during use, increasing the airflow of the volute structure.

[0034] Optionally, the noise reduction component 30 has multiple toothed portions 31, which are spaced apart along the extending direction of the noise reduction component 30. In this way, when the airflow passes through the noise reduction component 30, pairs of relatively rotating vortices are formed between each pair of adjacent toothed portions 31. These small vortices promote airflow and further avoid turbulence at the connection between the volute tongue 20 and the curved panel 12, thereby reducing the low-frequency noise of the airflow.

[0035] like Figure 2 As shown, the tooth tip angle C of the toothed portion 31 satisfies: 15°≤C≤30°. In this way, the above configuration makes the processing and manufacturing of the toothed portion 31 easier and simpler, reducing processing costs; on the other hand, it minimizes the gas turbulence at the connection between the volute tongue 20 and the curved panel 12, thereby reducing the vibration and noise of the volute structure during use.

[0036] like Figure 1As shown, the volute tongue 20 also includes a volute tongue rear end 23. The volute tongue rear end 23 is connected to the volute tongue middle part 22, and the volute tongue rear end 23 is connected to the volute tongue front end 21 via the volute tongue middle part 22. The volute tongue rear end 23 is a flat plate structure, and a preset angle is formed between the volute tongue rear end 23 and the volute tongue middle part 22. This arrangement makes the airflow at the air outlet 11 smoother, thereby increasing the airflow of the volute structure and reducing the vibration and noise of the volute structure.

[0037] Specifically, the noise comparison between the volute structure in this embodiment and the volute structure in the prior art is shown in Table 1:

[0038] Table 1. Noise comparison between the volute structure in this embodiment and the volute structure in the prior art at different fan speeds.

[0039]

[0040] Table 1 shows that when the fan blades are running at a certain speed, the total noise level of the volute structure in this embodiment is not much different from that of the volute structure in the prior art, but the peak noise level is significantly lower. Therefore, the airflow of the volute structure in this embodiment is 5-7% higher than that of the volute structure in the prior art, the total noise level changes very little, the peak noise level is significantly lower (the peak noise level directly affects the sound quality), and the rotational noise is effectively solved.

[0041] This application also provides a fan (not shown), including a volute structure and fan blades disposed within the volute structure. The volute structure is the aforementioned volute structure. Optionally, the fan is a centrifugal fan.

[0042] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0043] The volute structure includes a shell body and a volute tongue. The shell body has an air outlet and includes a first plate, a second plate, and a curved plate. The first and second plates are opposite to each other and parallel to each other, connected by the curved plate to create a helical inner cavity within the shell body. The volute tongue includes a front end and a middle portion connected to the front end. The middle portion connects to the curved plate via the front end. The cross-section of the curved plate connecting to the front end and the surface of the middle portion facing the air outlet forms an angle A, satisfying 43°≤A≤75°. This angle, during the process of the volute structure guiding the air blown out by the fan blades, increases the airflow and reduces noise, effectively solving the problems of poor airflow and excessive noise in existing volute structures. This improves the working efficiency of the volute structure and enhances the user experience.

[0044] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A volute structure, characterized in that, include: The housing body (10) has an air outlet (11). The housing body (10) includes a first plate, a second plate and a curved plate (12). The first plate and the second plate are arranged opposite to each other and parallel to each other. The first plate and the second plate are connected through the curved plate (12) so that the housing body (10) has a spiral inner cavity (13). The worm tongue (20) includes a worm tongue front end (21) and a worm tongue middle part (22) connected to the worm tongue front end (21), and the worm tongue middle part (22) is connected to the curved panel body (12) through the worm tongue front end (21); The cross-section of the part connecting the curved panel (12) and the front end (21) of the volute tongue forms an angle with the surface of the middle part (22) of the volute tongue facing the air outlet (11). The included angle is set. satisfy: ; The volute structure also includes: A noise reduction component (30) is disposed on the front end (21) of the worm tongue. The noise reduction component (30) has a toothed portion (31) which is disposed toward the side away from the front end (21) of the worm tongue. The tooth tip angle of the tooth-shaped portion (31) satisfy: ; The cochlea (20) also includes: The rear end (23) of the worm tongue is connected to the middle part (22) of the worm tongue. The rear end (23) of the worm tongue is connected to the front end (21) of the worm tongue through the middle part (22) of the worm tongue. The rear end (23) of the worm tongue is a flat plate structure. The rear end (23) of the worm tongue and the middle part (22) of the worm tongue are set at a preset angle.

2. The volute structure according to claim 1, characterized in that, The front end (21) of the volute tongue is a curved panel structure, the middle part (22) of the volute tongue is a flat plate structure, and the outer wall surface of the front end (21) of the volute tongue is tangent to the outer wall surface of the curved panel body (12).

3. The volute structure according to claim 1, characterized in that, The noise reduction component (30) is snapped, glued, or connected to the front end (21) of the volute tongue by fasteners.

4. The volute structure according to claim 1, characterized in that, The noise reduction component (30) is one, and the noise reduction component (30) extends along a first preset direction so that the noise reduction component (30) is tangent to the front end (21) of the worm tongue; wherein, the first preset direction extends radially along the curved panel body (12).

5. The volute structure according to claim 1, characterized in that, There are multiple noise reduction components (30), each of which extends along a first preset direction so that each of the noise reduction components (30) is tangent to the front end (21) of the volute tongue, and the multiple noise reduction components (30) are spaced apart along a second preset direction; wherein, the first preset direction extends radially along the curved panel body (12), and the second preset direction is the thickness direction of the volute structure.

6. The volute structure according to claim 1, characterized in that, The noise reduction component (30) has multiple teeth (31), and the multiple teeth (31) are spaced apart along the extension direction of the noise reduction component (30).

7. A fan, characterized in that, It includes a volute structure and a fan blade disposed within the volute structure; wherein the volute structure is the volute structure according to any one of claims 1 to 6.

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