An inner and outer integrated strong circulation unpowered fan

Abstract

This utility model provides an integrated internal and external high-power circulating non-powered fan, including an installation structure, a main fan structure, and an exhaust fan structure. The installation structure has a vertically penetrating main shaft in the middle, with the main fan structure and exhaust fan structure respectively located on the upper and lower sides of the installation structure. The main fan structure includes a spherical fan with multiple fan blades vertically arranged along the circumferential direction. The exhaust fan structure includes multiple horizontally arranged exhaust fan blades. Both the fan blades and the exhaust fan blades are fixedly connected to the main shaft. This utility model can increase airflow in low-wind-speed environments, meeting the high ventilation requirements of industrial plants, agricultural greenhouses, and other similar scenarios.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a powerful, non-powered fan with integrated internal and external circulation. Background Technology

[0002] In today's society, energy consumption remains a key concern in the industrial and construction sectors. Traditional mechanical ventilation equipment, such as electric exhaust fans, requires electricity to operate, and some factories use a significant amount, undoubtedly increasing operating costs. With increasing demands for energy conservation and emission reduction, finding ventilation equipment that does not require additional power input has become an inevitable trend.

[0003] According to statistics, in some large industrial plants or commercial buildings, the electricity consumption of ventilation equipment accounts for a certain proportion of the total energy consumption. However, traditional non-powered fans rely on external wind force and a slight indoor-outdoor temperature difference to rotate and generate airflow. The airflow is negligible, and the airflow can hardly be felt inside the fan, resulting in poor performance. Therefore, a new type of high-powered non-powered fan with integrated internal and external circulation has been developed. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides an integrated internal and external high-power circulating non-powered fan to increase air volume in low wind speed environments.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] In a first aspect, this utility model provides an integrated internal and external high-power circulating non-powered fan, including an installation structure, a main fan structure and an exhaust structure. The installation structure is provided with a main shaft running vertically through the middle, and the main fan structure and the exhaust structure are respectively provided on the upper and lower sides of the installation structure.

[0007] The main fan structure includes a spherical fan, which includes multiple fan blades arranged vertically along the circumferential direction. The air intake structure includes multiple air intake fan blades arranged horizontally. Both the fan blades and the air intake fan blades are fixedly connected to the main shaft.

[0008] The beneficial effects of this utility model are as follows: the induced draft fan blades and the fan blades are mechanically coupled through the main shaft. The fan blades are driven by the natural airflow to drive the main shaft to rotate, which in turn drives the induced draft fan blades to do passive work, thereby achieving "dual-stage induced draft" to increase the air volume in low wind speed environments and meet the high ventilation requirements of industrial plants, agricultural greenhouses and other scenarios.

[0009] Optionally, the inclination angle of the fan blades is 22° and the chord length ratio is 1:1.5.

[0010] As described above, by setting the tilt angle and chord ratio of the fan blades, interference resistance can be reduced, thereby further increasing the air volume.

[0011] Optionally, the main shaft is provided with an upper shaft sleeve and a lower shaft sleeve, and the spherical fan further includes an upper support reinforcing rib connected to the upper part of the fan blade and a lower support reinforcing rib connected to the lower part of the fan blade. The upper support reinforcing rib is connected to the upper shaft sleeve, and the lower support reinforcing rib is connected to the lower shaft sleeve.

[0012] As described above, upper / lower support ribs are used to further improve the wind load resistance of the spherical fan and ensure its safe and reliable operation.

[0013] Optionally, the mounting structure includes a base plate and a centrally located central connecting plate, wherein a rolling bearing is disposed in the middle of the central connecting plate, and the main shaft is mounted on the rolling bearing.

[0014] Optionally, it also includes a flow guide, the upper end of which is connected to the lower end of the base plate, the lower end of which is horn-shaped, and the air-guiding structure is located inside the flow guide.

[0015] As described above, the duct and the main fan structure form a directional airflow channel, reducing eddy current losses.

[0016] Optionally, the upper end of the flow guide is fixedly connected to the lower end of the base plate by countersunk bolts.

[0017] Optionally, the base plate has mounting holes at both ends that mate with fixing bolts.

[0018] Optionally, the fan blades and the induced draft fan blades are arranged in a staggered manner in the horizontal direction.

[0019] Optionally, the fan blades are made of stainless steel, and the induced draft fan blades are made of carbon fiber with a honeycomb sandwich structure.

[0020] Optionally, the main fan structure further includes a wind cap cover, which is located on the side of the spherical fan away from the mounting structure. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an integrated internal and external high-power circulation non-powered fan according to an embodiment of the present utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Mounting structure; 11. Spindle; 12. Upper bushing; 13. Lower bushing; 14. Base plate; 15. Middle connecting plate; 16. Rolling bearing; 17. Countersunk bolt; 18. Fixing bolt;

[0024] 2. Main fan structure; 21. Fan blades; 22. Upper support reinforcing ribs; 23. Lower support reinforcing ribs; 24. Fan cap;

[0025] 3. Exhaust fan structure; 31. Exhaust fan blades;

[0026] 4. Radiator shield. Detailed Implementation

[0027] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0028] Example 1

[0029] Please refer to Figure 1 This utility model provides an integrated internal and external high-power circulating non-powered fan, including an installation structure 1, a main fan structure 2, an air duct structure 3 and a guide shroud 4. The installation structure 1 has a main shaft 11 running vertically through the middle, and the main fan structure 2 and the air duct structure 3 are respectively located on the upper and lower sides of the installation structure 1.

[0030] In this embodiment, the mounting structure 1 includes a base plate 14 and a centrally located connecting plate 15. The base plate 14 has mounting holes at both ends for engagement with fixing bolts 18, allowing for quick installation in the application scenario. A rolling bearing 16 is located in the middle of the connecting plate 15, and the spindle 11 is mounted on the rolling bearing 16. The surface of the rolling bearing 16 is coated with a diamond-like carbon coating, has a friction coefficient ≤0.02, and a lifespan of 100,000 hours.

[0031] The main fan structure 2 includes a spherical fan and a hood 24, with the hood 24 located on the side of the spherical fan away from the mounting structure 1. The spherical fan includes multiple fan blades 21 arranged vertically along the circumferential direction, and the air intake structure 3 includes multiple horizontally arranged exhaust fan blades 31. Both the fan blades 21 and the exhaust fan blades 31 are fixedly connected to the main shaft 11. Thus, the exhaust fan blades and the fan blades 21 are mechanically coupled through the main shaft 11 to achieve "two-stage air intake," thereby increasing the air volume in low-wind-speed environments.

[0032] The main shaft 11 is provided with an upper shaft sleeve 12 and a lower shaft sleeve 13. The spherical fan also includes an upper support reinforcing rib 22 connected to the upper part of the fan blades 21 and a lower support reinforcing rib 23 connected to the lower part of the fan blades 21. The upper support reinforcing rib 22 is connected to the upper shaft sleeve 12, and the lower support reinforcing rib 23 is connected to the lower shaft sleeve 13, so as to further improve the wind load resistance of the spherical fan and ensure the safe and reliable operation of the fan.

[0033] In this embodiment, the fan blades 21 and the induced draft fan blades 31 are arranged in a staggered manner in the horizontal direction, so that the rotation cycles of the two are timed, avoiding direct airflow collision, thereby further increasing the air volume.

[0034] In this embodiment, the fan blade 21 is made of 1.2mm thick stainless steel, and the induced draft fan blade is made of carbon fiber with a honeycomb sandwich structure, with a density of <1.6g / cm³, reducing the moment of inertia by 40%.

[0035] In this embodiment, the tilt angle of the fan blade 21 is 22° and the chord length ratio is 1:1.5. CFD simulation verification shows that this can reduce interference resistance and further increase air volume.

[0036] In this embodiment, the upper end of the flow guide shroud 4 is fixedly connected to the lower end of the base plate 14 by countersunk bolts 17. The lower end of the flow guide shroud 4 is horn-shaped, and the air intake structure 3 is located inside the flow guide shroud 4. The flow guide shroud 4 and the main fan structure 2 form a directional airflow channel to reduce eddy current loss.

[0037] Therefore, the working principle of this embodiment is as follows: the fan blades 21 are driven to rotate by the natural airflow, and the main shaft 11 is driven to rotate by the upper support reinforcing ribs 22 and the lower support reinforcing ribs 23. The main shaft 11 synchronously drives the fan blades to do passive work, realizing "double-stage airflow" on both the upper and lower sides.

[0038] Therefore, this embodiment has the following advantages:

[0039] (1) By using “dual-stage air intake”, setting the parameters of the fan blades 21 and the guide shroud 4, the air volume is increased to meet the high ventilation requirements of industrial plants, agricultural greenhouses and other scenarios.

[0040] (2) Since it is driven entirely by natural airflow, there are no energy-consuming components such as motors and gearboxes, which reduces operation and maintenance costs.

[0041] (3) By selecting the coating of the rolling bearing 16 and the materials of the fan blades 21 and the induced draft fan blades, the service life of the fan can be extended.

[0042] (4) Its overall mechanical transmission noise is low, making it suitable for sensitive places such as residential areas and hospitals.

[0043] (5) Modular design supports rapid on-site assembly, reducing the installation cycle.

[0044] Therefore, this embodiment has the advantages of large air volume, low cost, short lifespan, low noise, fast installation, and wide applicability.

[0045] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0047] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated internal and external strong circulation unpowered fan, characterized in that, It includes an installation structure, a main fan structure, and an exhaust structure. The installation structure has a main shaft running vertically through the middle, and the main fan structure and the exhaust structure are respectively located on the upper and lower sides of the installation structure. The main fan structure includes a spherical fan, which includes multiple fan blades arranged vertically along the circumferential direction. The air intake structure includes multiple air intake fan blades arranged horizontally. Both the fan blades and the air intake fan blades are fixedly connected to the main shaft.

2. The integrated internal and external power cycle fan as claimed in claim 1, wherein, The wind turbine blades have an inclination angle of 22° and a chord length ratio of 1:1.

5.

3. The integrated internal-external high-force circulation unpowered fan of claim 1, wherein, The main shaft is provided with an upper shaft sleeve and a lower shaft sleeve. The spherical fan also includes an upper support reinforcing rib connected to the upper part of the fan blade and a lower support reinforcing rib connected to the lower part of the fan blade. The upper support reinforcing rib is connected to the upper shaft sleeve, and the lower support reinforcing rib is connected to the lower shaft sleeve.

4. The integrated internal-external high-force circulation unpowered fan of claim 1, wherein, The mounting structure includes a base plate and a centrally located connecting plate. A rolling bearing is located in the middle of the connecting plate, and the main shaft is mounted on the rolling bearing.

5. The integrated internal-external high-force circulation unpowered fan of claim 4, wherein, It also includes a flow guide, the upper end of which is connected to the lower end of the base plate. The lower end of the flow guide is funnel-shaped, and the air-guiding structure is located inside the flow guide.

6. The integrated internal-external high-cycle unpowered fan of claim 5, wherein, The upper end of the flow guide is fixedly connected to the lower end of the base plate by countersunk bolts.

7. The integrated internal-external high-force circulation unpowered fan of claim 4, wherein, The base plate has mounting holes at both ends for use with fixing bolts.

8. The integrated internal-external high-power-circulation unpowered fan according to any one of claims 1 to 7, characterized in that, The fan blades and the induced draft fan blades are arranged in a staggered manner in the horizontal direction.

9. The integrated internal-external high-force circulation unpowered fan according to any one of claims 1 to 7, characterized in that, The fan blades are made of stainless steel, and the induced draft fan blades are made of carbon fiber with a honeycomb sandwich structure.

10. The integrated internal-external high-force circulation unpowered fan according to any one of claims 1 to 7, characterized in that, The main fan structure also includes a wind cap, which is located on the side of the spherical fan away from the mounting structure.

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