TW202014610A - Air guide structure for fan - Google Patents

Abstract

An air guide structure for a fan includes a contraction section and a diffusion section. The contraction section is connected to the diffusion section. The contraction section is used to introduce airflow into the interior, and the diffusion section is used to derive airflow at the interior. The contraction section forms an air inlet, and the contracting section is tapered away from the air inlet to the diffusion section. The diffusion section forms an air outlet, and the diffusion section is gradually expanded from the contraction section toward the air outlet.

Description

Diversion structure of negative pressure fan

The invention relates to a negative pressure fan, in particular to a guide structure of a negative pressure fan which can increase the air volume of the negative pressure fan.

According to the press, the negative pressure fan is widely used, and it is generally used in agriculture, fishing, animal husbandry industry and factory workshops. In order to increase the air volume, the negative pressure fan can be optimized for the fan blade or increase the fan speed, usually with a guide structure such as wind The existing negative-pressure fan is usually a simple arc, or a straight line shape, or an enlarged diameter, but these fans are of limited benefit to the improvement of air volume.

In view of this, the inventor has been engaged in the development and design of related products for many years, and feels that the above-mentioned deficiencies can be improved. It is especially devoted to research and cooperation with the application of academic principles. Finally, he proposes a reasonable design and effectively improves the above-mentioned deficiencies of the present invention.

The main purpose of the present invention is to provide a diversion structure for a negative pressure fan to solve the above problems.

The invention discloses a diversion structure of a negative pressure fan, which is suitable for being assembled with a fan. The diversion structure of the negative pressure fan includes: a current collecting and constricting section and a flow guiding and dispersing section. The diffusion section is connected, the current collecting and constricting section can be used to introduce airflow, the flow guiding and dispersing section can be used to direct airflow, the current collecting and constricting section forms a current collecting inlet, and the current collecting and constricting section is away from the set The direction of the inlet is gradually tapered to the diversion and diffusion section, the diversion and diffusion section is formed with a diversion outlet, and the diversion and diffusion section is diffused from the collector constriction section toward the direction of the diversion outlet, and the diversion Diffusion section Between the side wall of the current collecting and contracting section and the side wall of the current collecting and contracting section are arranged at an angle between 160 degrees and 165 degrees, and the side wall of the diversion and diffusion section is perpendicular to a central axis of the current collecting and contracting section The angle of the surface is between 77 degrees and 78 degrees.

Preferably, the ratio of the width of the current collecting contraction section to the width of the diversion diffusion section is in the range of 1:1.2~3.

Preferably, the diversion and diffusion section is a configuration in which the expansion angle is between 20 degrees and 30 degrees.

Preferably, the diameter of the diversion and diffusion section at the diversion outlet is a configuration with a length between 1750 mm and 1800 mm.

Preferably, wherein the current collecting and contracting section is integrally connected with the flow guiding and diffusion.

Preferably, wherein the current collecting contraction section and the flow guiding diffusion are connected in an assembled manner.

Therefore, the diversion structure of the negative pressure fan provided by the present invention, the constriction section of the negative pressure fan gradually decreases from the direction away from the confluence inlet to the diversion and diffusion section, and the diversion and diffusion section diffuses from the constriction section to the direction of the diversion outlet Through the design of tapered and tapered profiles, the air flow introduced and exported can be effectively increased, and the angle between the side wall of the diversion and diffusion section and the side wall of the collection and contraction section is between 160 degrees and 165 degrees. And the side wall of the diversion and diffusion section has an angle between 77 degrees and 78 degrees with respect to a plane perpendicular to the central axis of the collector and contraction section, which has a better introduction and The export effect can effectively increase the air volume without increasing the fan speed.

For the advantages of the present invention, please refer to the following detailed description and drawings of the present invention for further understanding.

11‧‧‧Collecting section

110‧‧‧ collector inlet

12‧‧‧Diversion and diffusion section

120‧‧‧Diversion outlet

W1, W2‧‧‧Width

D‧‧‧ caliber

θ1‧‧‧ included angle

θ2, θ3‧‧‧Angle

1 is a schematic side view of a diversion structure of a negative pressure fan according to a preferred embodiment of the present invention.

Fig. 2 is a guide structure of a negative pressure fan without a guide diffuser of the present invention View line graph.

FIG. 3 is an appearance line diagram of a diversion structure of a negative pressure fan of the present invention.

FIG. 4 is an appearance line diagram of another negative pressure fan guide structure of the present invention.

FIG. 5 is a line diagram of the appearance of another negative-pressure fan guide structure of the present invention.

6 is a line diagram of the appearance of a guide structure of a negative pressure fan according to a preferred embodiment of the present invention.

The following describes the implementation of the "negative-pressure fan guide structure" disclosed in the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification . The present invention can also be implemented or applied by other different specific examples. Various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the spirit of the present invention. In addition, the drawings of the present invention are for illustrative purposes only, and are not depicted according to actual dimensions. Directional terms mentioned in the present invention, for example: left, right, up or down, etc., are only the directions referring to the drawings, which are used for illustration but not for limiting the present invention. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the technical scope of the present invention.

Please refer to FIG. 1, which is a diversion structure of a negative pressure fan provided by the present invention, which can be used for air flow transmission, such as agriculture, fishing, animal husbandry, and factory workshop ventilation and cooling, and exhaust gas removal, but is not limited thereto. Moreover, the diversion structure of the negative pressure fan of the present invention is suitable for being assembled with a fan, wherein the fan is, for example, a wing fan, and the wing fan can significantly improve the fan efficiency compared to the conventional fan blade To reduce fan noise.

Further, the diversion structure of the negative-pressure fan provided by the present invention includes a collector constriction section 11 and a diversion diffusion section 12. The current collecting and contracting section 11 is used to introduce airflow, and the guide and diffusion section 12 is used to guide airflow.

The current collecting and contracting section 11 is connected to the flow guiding and diffusing section 12, and the current collecting and contracting section 11 and the guide and diffusing section 12 may be integrally connected or detachably connected, that is, the current collecting and contracting section 11 and the flow guiding and diffusing section The segment 12 can form a connection in an assembled manner, but it is not limited.

The current collecting and constricting section 11 is formed with a current collecting inlet 110, and the current constricting section 11 is gradually tapered from the direction away from the current collecting inlet 110 to the flow guiding and spreading section 12. The diversion and diffusion section 12 is formed with a diversion outlet 120, and the diversion and diffusion section 12 is diffused from the constriction section 11 toward the diversion outlet 120.

Further, the width W1 of the diversion and diffusion section 12 is greater than the width W2 of the constriction and contraction section 11, it can also be said that the height of the diversion and diffusion section 12 along the central axis is greater than the height of the constriction and contraction section 11 along the central axis, and the The ratio of the width W2 of the flow contraction section 11 to the width W1 of the flow guide diffusion section 12 is preferably in the range of 1:1.2~3. For example, in an embodiment, the width W1 of the flow guiding and diffusion section 12 may be 818 millimeters (mm), and the width W2 of the current collecting and contracting section 11 may be 630 millimeters (mm).

Furthermore, the side wall of the flow guiding and diffusing section 12 and the side wall of the current collecting and contracting section 11 are arranged at an included angle θ1 between 160 degrees and 165 degrees, and the measured effect is the best. In addition, the angle θ2 of the side wall of the diversion diffusion section 12 with respect to the plane parallel to the collector inlet 110 can also be said to be an angle θ2 of 77 with respect to a plane perpendicular to the central axis of the collector contraction section 11 The setting type between degrees and 78 degrees is the best after actual measurement. For example, in one embodiment, the included angle θ1 between the side wall of the diversion and diffusion section 12 and the side wall of the collection and contraction section 11 may be 163.85 degrees, and the angle θ2 of the side wall of the diversion and diffusion section 12 may be 77.5 degrees.

Furthermore, the diversion and diffusion section 12 is an installation type in which the expansion angle θ3 is between 20 degrees and 30 degrees. In addition, the diameter D of the diversion diffusion section 12 at the diversion outlet 120 is a configuration in which the length is between 1750 millimeters (mm) and 1800 millimeters (mm). For example, in an embodiment, the diversion angle 12 of the diversion and diffusion section 12 is 25 The diameter D of the diversion diffusion section 12 at the diversion outlet is 1790 millimeters (mm).

Please refer to FIGS. 2 to 6 again. FIG. 2 is an appearance line diagram of a guide structure of a negative pressure fan without a guide diffusion section illustrated in the present invention, and FIG. 3 is a negative pressure example illustrated in the present invention. Appearance profile diagram of the fan guide structure. FIG. 4 is an outline profile diagram of another negative pressure fan guide structure exemplified by the present invention. FIG. 5 is an appearance of another negative pressure fan guide structure exemplified by the present invention. Profile diagram, FIG. 6 is a profile diagram of the appearance of the guide structure of a negative pressure fan according to a preferred embodiment of the present invention, and the arrow indicates the direction of air travel. According to the measured results of air volume, the measured air volume of the guide structure of the negative pressure fan without the diffuser section shown in Figure 2 is 50480m ³ /h, and the measured air volume of the guide structure of the negative pressure fan shown in Figure 3 is 54044m ³ /h Compared with Figure 2, the air volume has increased by 7.23%. The measured air volume of the negative pressure fan guide structure illustrated in Figure 4 is 55332m ³ /h. Compared with Figure 2, the air volume has increased by 9.80%. The measured air volume of the negative pressure fan guide structure illustrated in 5 is 52800m ³ /h, which is 4.76% higher than that shown in FIG. 2. The negative pressure fan guide structure illustrated in FIG. 6 is one of the most In a preferred embodiment, as shown in FIG. 1, the width W1 of the diversion and diffusion section 12 is 818 millimeters (mm), the width W2 of the collection and contraction section 11 is 630 millimeters (mm), and the diameter D of the diversion outlet 120 is 1790 In millimeters (mm), the diversion angle of the diversion and diffusion section 12 is 25 degrees, the angle θ1 between the diversion and diffusion section 12 and the collector contraction section 11 is 163.85 degrees, and the inclination angle θ2 of the diversion and diffusion section 12 is 77.5 degrees , And the measured air volume is 55540m ³ /h, compared with Figure 2, the air volume is improved by a full 10.76%, so the measured results clearly show the importance of the guideline structure of the negative pressure fan guide structure, which can be found in the fan Without increasing the speed, the air volume is effectively increased.

In summary, the diversion structure of the negative-pressure fan provided by the present invention, the constriction section 11 gradually decreases from the direction away from the concentrator inlet 110 to the diversion and diffusion section 12, and the diversion and diffusion section 12 is formed by the constriction section 11 Diffusion toward the diversion outlet 120, through the tapered and gradually expanded profile design, effectively increase the air flow introduced and exported, and further through The side wall of the diversion diffusion section 12 and the side wall of the current collection and contraction section 11 are arranged at an included angle between 160 degrees and 165 degrees, and the side wall of the diversion and diffusion section 12 is opposite to the one of the current collection and contraction section The setting of the plane with the vertical axis of 11 between 77 degrees and 78 degrees has a better effect of introducing and exporting airflow, which can effectively increase the air volume without increasing the fan speed.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of patent protection of the present invention. Therefore, all equivalent changes in the description and drawings of the present invention are included in the protection of the rights of the present invention. Within the scope, together with Chen Ming.

11‧‧‧Collecting section

110‧‧‧ collector inlet

12‧‧‧Diversion and diffusion section

120‧‧‧Diversion outlet

W1, W2‧‧‧Width

D‧‧‧ caliber

θ1‧‧‧ included angle

θ2, θ3‧‧‧Angle

Claims (6)

A negative pressure fan guide structure is suitable for assembling with a fan. The negative pressure fan guide structure includes: a current collecting and constricting section and a guide and dispersing section. The current collecting and condensing section is in phase with the guide and dispersing section Connection, the current collecting and constricting section can be used to introduce airflow, the flow guiding and dispersing section can be used to direct airflow, the current collecting and constricting section forms a current collecting inlet, and the current collecting and constricting section is separated from the current collecting inlet by The direction is gradually reduced to the diversion and diffusion section, the diversion and diffusion section is formed with a diversion outlet, and the diversion and diffusion section is diffused from the collector constriction section toward the direction of the diversion outlet, and the diversion and diffusion section The side wall and the side wall of the current collecting and contracting section are arranged at an angle between 160 degrees and 165 degrees, and the side wall of the diversion and diverging section is relatively perpendicular to the central axis of the current collecting and contracting section The configuration of the angle between 77 degrees and 78 degrees. The diversion structure of the negative pressure fan as described in claim 1, wherein the ratio of the width of the constriction section to the width of the diversion section is in the range of 1:1.2~3. The diversion structure of the negative-pressure fan as described in claim 2, wherein the diversion and diffusion section is a configuration in which the expansion angle is between 20 degrees and 30 degrees. The diversion structure of the negative-pressure fan according to claim 3, wherein the diameter of the diversion diffusion section at the diversion outlet is a configuration with a length between 1750 mm and 1800 mm. The diversion structure of the negative-pressure fan according to claim 1, wherein the collector-contracted section is integrally connected with the diversion and diffusion. The diversion structure of the negative pressure fan as described in claim 1, wherein the collector-contracted section and the diversion diffusion are connected in an assembled manner.

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