A perturbed fluidic aerodynamic fan

Abstract

The present application relates to a kind of perturbation jet flow aerodynamic fan, including air duct, motor and impeller, the air duct is tubular, air duct one section is air inlet section, another section is air outlet section, the motor is axially fixed in air duct middle part and its output shaft is towards the air outlet section of air duct, the impeller is fixedly nested on the output shaft of motor, the air outlet section of the air duct is provided with air collecting barrel, the air collecting barrel is long tubular with circular inner section, air collecting barrel is set along the length direction of air duct, and the inner wall of the circumferential of air collecting barrel is spirally provided with the recessed air collecting groove, and the upper surface middle part of air collecting barrel is hinged with the inner wall of air duct.The present application is to solve or at least mitigate the problem that the current jet flow fan will reduce thrust to some extent when adjusting the jet angle, provide a kind of perturbation jet flow aerodynamic fan.

Description

Technical Field

[0001] This invention belongs to the field of fan technology, and particularly relates to a disturbance jet aerodynamic fan. Background Technology

[0002] Jet fans are a special type of axial flow fan, primarily used in longitudinal ventilation systems for tunnels in highways, railways, and subways. They can also be used in sensitive areas of semi-lateral or lateral ventilation systems, such as tunnel inlets and outlets, to induce airflow or exhaust smoke. Currently, ordinary jet fans cannot adjust their angle, and sometimes the installation space has a certain slope, preventing them from effectively inducing airflow.

[0003] Jet fans are typically installed on the tunnel ceiling. They usually operate within a duct, housing a high-powered fan that drives air to form a jet for airflow and exchange. However, the airflow has a diffusion angle, causing friction between the upper airflow and the tunnel, resulting in significant energy loss and further reducing the jet's distance. In existing technology, the inlet and outlet nozzles of the duct are angled to the fan axis to reduce friction loss, but this fixed angle cannot be adjusted based on tunnel conditions. This leads to a significant waste of actual jet fan thrust and fails to meet system design requirements. Furthermore, if installation errors occur and readjustment is needed, reinstallation at a height is required, which is inconvenient.

[0004] For example, invention patent application number CN202111171180.6 discloses a jet fan with adjustable inlet and outlet airflow direction, which includes a hollow cylindrical air duct. A spherical sleeve is fixed to each end of the air duct. Rotatable inlet and outlet air ducts are connected to the spherical exterior of the sleeves, and the inlet and outlet air ducts are fixed to the corresponding spherical sleeves by clamps. The inlet and outlet air ducts can be adjusted in all directions on the spherical sleeves, meeting the needs of various working conditions. The adjustment method is simple and efficient, effectively improving the practicality of the jet fan. Another invention patent application with application number CN202010961868.3 discloses a jet fan with adjustable spray angle, which includes a housing and a spray head. The housing includes an integrally formed air inlet cylinder and a first hemisphere, with a notch formed at the front end of the first hemisphere. The spray head includes an integrally formed second hemisphere and an air outlet cylinder. The spherical outer wall of the second hemisphere abuts against the spherical inner wall of the first hemisphere, and the air outlet cylinder can be rotated up and down within the notch via an adjustment mechanism. This invention can change the spray direction of the jet fan by adjusting the angle of the spray head, and the sprayed airflow is concentrated, resulting in a better induction effect.

[0005] The two invention patents mentioned above adjust the jet direction of the jet fan by adjusting the angle of the inlet and outlet air ducts and the nozzle. There is an angle between the air outlet direction of the internal fan and the jet direction, which can adjust the jet direction. However, the airflow will be lost due to friction with the inner wall of the air duct when it is inside the air duct, resulting in a great waste of the actual jet fan thrust and failing to meet the system design requirements. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, solve or at least alleviate the problem that current jet fans reduce thrust to a certain extent when adjusting the injection angle, and provide a disturbance jet aerodynamic fan.

[0007] This invention is achieved through the following technical solution: A perturbation jet aerodynamic fan includes a guide tube, a motor, and an impeller. The guide tube is tubular, with one section being an air inlet and the other an air outlet. The motor is axially fixed in the middle of the guide tube, with its output shaft facing the air outlet. The impeller is fixedly fitted onto the output shaft of the motor. An air-collecting tube is provided inside the air outlet section of the guide tube. The air-collecting tube is a long tube with a circular inner cross-section and is arranged along the length of the guide tube. The inner circumference of the air-collecting tube is spirally provided with concave air-collecting grooves, and the middle of the upper surface of the air-collecting tube is hinged to the inner wall of the guide tube.

[0008] To further realize the present invention, the following technical solutions may be preferred: Preferably, a hinge rod is vertically arranged in the middle of the upper surface of the air-collecting duct. The lower end of the hinge rod is fixedly connected to the air-collecting duct, and the upper end is spherical. The upper end of the hinge rod is slidably fitted onto the air guide tube. An adjusting rod is vertically arranged in the middle of the lower surface of the air-collecting duct. The adjusting rod is coaxially arranged with the hinge rod. The upper end of the adjusting rod is fixedly connected to the air-collecting duct, and the lower end extends outward from the air guide tube.

[0009] Preferably, an adjustment groove is provided on the lower side of the air outlet section of the air guide duct. The adjustment groove is cross-shaped, and the horizontal section of the adjustment groove is arranged along the length of the air guide duct. The adjustment rod extends out of the air guide duct through the adjustment groove.

[0010] Preferably, a sealing plate is slidably provided on the lower surface of the air outlet section of the air guide duct, and the adjusting rod is slidably fitted into the middle of the sealing plate. The sealing plate is circular, and the radius of the sealing plate is not less than the length of the vertical or horizontal section of the adjusting groove.

[0011] Preferably, the sealing plate has a transition hole in the middle, the transition hole is spherical, the diameter of the transition hole is greater than the thickness of the sealing plate, the transition block is provided in the transition hole, the transition block is spherical, the thickness of the transition block is less than the thickness of the sealing plate, the outer wall of the transition block is sealed and slidably fitted to the inner wall of the transition hole, and the adjusting rod is sealed and slidably fitted to the middle of the transition block.

[0012] Preferably, the section of the adjusting rod extending out of the air guide tube is provided with a top block and a locking nut in sequence from top to bottom. The top block is axially slidably fitted onto the adjusting rod. The upper end of the top block is a convex hemispherical shape and the bottom surface is a plane. The locking nut is threaded onto the adjusting rod, and the upper surface of the locking nut abuts against the lower surface of the top block.

[0013] Preferably, the air inlet section of the air guide duct has a circular cross-section, the air outlet section of the air guide duct has a square cross-section, the outer cross-section of the air concentrator has a square cross-section, and the outer wall of the air concentrator and the inner wall of the air guide duct are spaced apart.

[0014] Preferably, air guide holes are provided at the four corners of the air-collecting duct along its length.

[0015] Preferably, a directional plate is provided on both sides of the air outlet section end of the air guide duct. The directional plate is fitted into the side wall of the air guide duct, and the end of the directional plate near the motor is hinged to the side wall of the air guide duct.

[0016] Preferably, the air outlet section of the air duct has vertically arranged air distribution plates on both sides of the end near the motor. The end of the air distribution plate facing the air gathering tube is hinged to the air duct, and the air distribution plates are spaced apart from the side wall of the air outlet section of the air duct.

[0017] The beneficial effects of the present invention through the above technical solution are: This invention features a concentrator located inside a guide tube, with its upper part hinged to the guide tube. The injection angle is adjusted by regulating the angle between the concentrator and the guide tube. A direct injection channel is formed between the outer wall of the concentrator and the inner wall of the guide tube, and the injection direction of the airflow within the direct injection channel is consistent with the length direction of the guide tube. A concave concentrator groove is provided inside the concentrator. Regardless of whether the direction of the concentrator is consistent with that of the guide tube, the airflow entering the concentrator is driven by the concentrator groove to spiral outward along the length of the concentrator, avoiding friction caused by the misalignment of the injection direction with the guide tube. The airflow exiting the concentrator drives the airflow ejected from the direct injection channel to rotate forward, subsequently driving the gas in the space to rotate forward, reducing the waste of the jet fan's thrust.

[0018] Meanwhile, the air-concentrating tube is inside the air-guiding tube, and there are no moving parts at the end of the air-guiding tube, which makes it less likely to be accidentally touched and change the spray angle, reducing the difficulty of installation and use. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the structure of the present invention; Figure 2 For the present invention Figure 1 Sectional view at point AA; Figure 3 For the present invention Figure 1 Enlarged view of point B in the middle; Figure 4For the present invention Figure 2 Enlarged view of point C in the middle; Figure 5 This is a schematic diagram of the structure of the present invention; Figure 6 This is a schematic diagram of the air guide tube of the present invention; Figure 7 This is a schematic diagram of the structure of the air-collecting duct of the present invention; Figure 8 This is a cross-sectional view of the air-collecting duct of the present invention; Wherein: 1-Air guide tube; 2-Motor; 3-Impeller; 4-Air concentrator; 5-Hinged rod; 6-Adjusting rod; 7-Sealing plate; 8-Transfer block; 9-Top block; 10-Locking nut; 11-Directional plate; 12-Air distribution plate. Detailed Implementation

[0020] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: like Figures 1-8 As shown, a perturbation jet aerodynamic fan includes a guide tube 1, a motor 2, and an impeller 3. The guide tube 1 is tubular, with one section being an air inlet section and the other being an air outlet section. The motor 2 is axially fixed in the middle of the guide tube 1, with its output shaft facing the air outlet section of the guide tube 1. The impeller 3 is fixedly sleeved on the output shaft of the motor 2. An air concentrator 4 is provided inside the air outlet section of the guide tube 1. The air concentrator 4 is a long tube with a circular inner cross-section. The air concentrator 4 is arranged along the length of the guide tube 1. The inner wall of the air concentrator 4 is spirally provided with concave air concentrator grooves. The middle part of the upper surface of the air concentrator 4 is hinged to the inner wall of the guide tube 1.

[0023] The concentrator 4 is located inside the guide tube 1 and its upper part is hinged to the guide tube 1. The injection angle is adjusted by adjusting the angle between the concentrator 4 and the guide tube 1. A direct injection channel is formed between the outer wall of the concentrator 4 and the inner wall of the guide tube 1. The injection direction of the airflow in the direct injection channel is consistent with the length direction of the guide tube 1. The concentrator 4 is provided with a concave concentrator groove. Regardless of whether the direction of the concentrator 4 is consistent with the direction of the guide tube 1, after the airflow enters the concentrator 4, it will be driven by the concentrator groove to spiral outward along the length direction of the concentrator 4, avoiding friction caused by the inconsistent injection direction with the guide tube 1. The airflow exiting the concentrator 4 will drive the airflow ejected from the direct injection channel to rotate forward, and then drive the gas in the space to rotate forward, reducing the waste of the thrust of the jet fan.

[0024] Meanwhile, the air concentrator 4 is inside the air guide 1, and there are no moving parts at the end of the air guide 1, so it is not easy to accidentally touch it and change the spray angle, thus reducing the difficulty of installation and use.

[0025] To facilitate adjustment of the angle of the air-concentrating duct 4, in this embodiment, a hinge rod 5 is vertically arranged in the middle of the upper surface of the air-concentrating duct 4. The lower end of the hinge rod 5 is fixedly connected to the air-concentrating duct 4, and the upper end is spherical. The upper end of the hinge rod 5 is slidably fitted onto the air guide tube 1. An adjusting rod 6 is vertically arranged in the middle of the lower surface of the air-concentrating duct 4. The adjusting rod 6 is coaxially arranged with the hinge rod 5. The upper end of the adjusting rod 6 is fixedly connected to the air-concentrating duct 4, and the lower end extends outward from the air guide tube 1.

[0026] To optimize the product structure, an adjustment groove is provided on the lower side of the air outlet section of the air guide duct 1. The adjustment groove is cross-shaped, and the horizontal section of the adjustment groove is set along the length of the air guide duct 1. The adjustment rod 6 extends out of the air guide duct 1 through the adjustment groove. The lower part of the adjustment rod 6 moves along the adjustment groove to change the position of the air concentrator 4 and the air guide duct 1. When the adjustment rod 6 moves along the horizontal section of the adjustment groove, it can tilt the jet direction of the jet fan up and down. When the adjustment rod 6 is rotated, it can tilt the jet direction of the jet fan left and right. When the adjustment rod 6 moves along the vertical section of the adjustment groove, it can adjust the air volume on both sides of the direct jet channel, thereby adjusting the disturbance effect.

[0027] In order to prevent the airflow in the air duct 1 from escaping from the regulating groove and reducing the thrust, a sealing plate 7 is provided on the lower surface of the air outlet section of the air duct 1. The regulating rod 6 is sealed and slidably fitted in the middle of the sealing plate 7. The sealing plate 7 is circular, and the radius of the sealing plate 7 is not less than the length of the vertical or horizontal section of the regulating groove.

[0028] In order to enable the sealing plate 7 to change position with the adjusting rod 6 while maintaining its fit with the air guide tube 1, a transition hole is provided in the middle of the sealing plate 7. The transition hole is spherical and its diameter is greater than the thickness of the sealing plate 7. A transition block 8 is provided inside the transition hole. The transition block 8 is spherical and its thickness is less than the thickness of the sealing plate 7. The outer wall of the transition block 8 is sealed and slidably fitted with the inner wall of the transition hole, and the adjusting rod 6 is sealed and slidably fitted with the middle of the transition block 8.

[0029] To lock the position of the adjusting rod 6 and maintain the stability of the jet fan during operation, a top block 9 and a locking nut 10 are sequentially arranged from top to bottom on the section of the adjusting rod 6 extending out of the air guide tube 1. The top block 9 is axially slidably fitted onto the adjusting rod 6. The upper end of the top block 9 is a convex hemispherical shape, and the bottom surface is a flat surface. A rubber layer is provided on the upper end of the top block 9 to improve the friction between the top block 9 and the sealing plate 7, so as to make the sealing plate 7 stable in its position. The locking nut 10 is threaded onto the adjusting rod 6, and the upper surface of the locking nut 10 abuts against the lower surface of the top block 9.

[0030] The air inlet section of the air duct 1 has a circular cross-section, the air outlet section of the air duct 1 has a square cross-section, the outer cross-section of the air concentrator 4 has a square cross-section, and the outer wall of the air concentrator 4 is spaced apart from the inner wall of the air duct 1.

[0031] To increase ventilation, air guide holes are provided at the four corners of the air duct 4 along its length.

[0032] To alter the jet direction of the airflow on both sides of the direct jet channel, causing disturbance with the airflow ejected from the concentrator 4, thereby further adjusting the jet direction of the jet fan and driving more air into the surrounding space through disturbance, thus improving the induction effect of the jet fan, directional plates 11 are provided on both sides of the air outlet section of the air duct 1. The directional plates 11 are fitted into the side wall of the air duct 1, with the end of the directional plate 11 near the motor 2 hinged to the side wall of the air duct 1. Changing the angle between the directional plate 11 and the air duct 1 changes the jet direction of the airflow on both sides of the direct jet channel. The larger the angle between the directional plate 11 and the air duct 1, the stronger the disturbance between the airflow ejected from the concentrator 4 and the airflow ejected from the direct jet channel, the larger the range of influence on the surrounding air, and the relatively reduced jet distance.

[0033] To adjust the airflow ratio within the direct jet channel and the concentrator 4 to mitigate turbulence, the air distribution plates 12 can be rotated. Air distribution plates 12 are vertically installed on both sides of the air outlet section of the air duct 1 near the motor 2. The end of the air distribution plate 12 facing the concentrator 4 is hinged to the air duct 1, and the hinged air distribution plates 12 are spaced apart on the side wall of the air outlet section of the air duct 1. When both air distribution plates 12 rotate outwards, their ends are in contact with the side wall of the air duct 1. At this time, the jet fan only uses the concentrator 4 to spray airflow, and there is no turbulence, resulting in the maximum spray distance. When both air distribution plates 12 rotate inwards, their ends are in contact with each other and block the outside of the concentrator 4. At this time, the jet fan only uses the direct jet channel to spray airflow, and there is no turbulence or concentrating effect, resulting in a shorter spray distance.

[0034] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A perturbation jet aerodynamic fan, comprising a guide tube (1), a motor (2), and an impeller (3), wherein the guide tube (1) is tubular, with one section being an air inlet section and the other section being an air outlet section, the motor (2) being axially fixedly disposed in the middle of the guide tube (1) with its output shaft facing the air outlet section of the guide tube (1), and the impeller (3) being fixedly sleeved on the output shaft of the motor (2), characterized in that, An air-gathering tube (4) is provided in the air outlet section of the air guide tube (1). The air-gathering tube (4) is a long tube with a circular inner cross section. The air-gathering tube (4) is arranged along the length of the air guide tube (1). The inner wall of the air-gathering tube (4) is spirally provided with a concave air-gathering groove. The middle part of the upper surface of the air-gathering tube (4) is hinged to the inner wall of the air guide tube (1). A hinge rod (5) is vertically arranged in the middle of the upper surface of the air-collecting duct (4). The lower end of the hinge rod (5) is fixedly connected to the air-collecting duct (4), and the upper end is spherical. The upper end of the hinge rod (5) is slidably fitted onto the air guide tube (1). An adjusting rod (6) is vertically arranged in the middle of the lower surface of the air-collecting duct (4). The adjusting rod (6) is coaxially arranged with the hinge rod (5). The upper end of the adjusting rod (6) is fixedly connected to the air-collecting duct (4), and the lower end extends outward from the air guide tube (1). An adjustment groove is provided on the lower side of the air outlet section of the air guide tube (1). The adjustment groove is cross-shaped, and the horizontal section of the adjustment groove is arranged along the length of the air guide tube (1). The adjustment rod (6) extends out of the air guide tube (1) through the adjustment groove. The lower surface of the air outlet section of the air duct (1) is sealed and slidably provided with a sealing plate (7). The adjusting rod (6) is sealed and slidably fitted in the middle of the sealing plate (7). The sealing plate (7) is circular, and the radius of the sealing plate (7) is not less than the length of the vertical or horizontal section of the adjusting groove.

2. The perturbation jet aerodynamic fan according to claim 1, characterized in that, The sealing plate (7) is set in the middle. There is a spherical adapter hole with a diameter greater than the thickness of the sealing plate (7). An adapter block (8) is provided inside the adapter hole. The adapter block (8) is spherical and its thickness is less than the thickness of the sealing plate (7). The outer wall of the adapter block (8) is sealed and slidably fitted onto the inner wall of the adapter hole. The adjusting rod (6) is sealed and slidably fitted onto the middle of the adapter block (8).

3. The perturbation jet aerodynamic fan according to claim 1, characterized in that, The section of the adjusting rod (6) extending out of the air guide tube (1) is provided with a top block (9) and a locking nut (10) from top to bottom. The top block (9) is axially slidably fitted onto the adjusting rod (6). The upper end of the top block (9) is a convex hemispherical shape and the bottom surface is a plane. The locking nut (10) is threaded onto the adjusting rod (6), and the upper surface of the locking nut (10) abuts against the lower surface of the top block (9).

4. The perturbation jet aerodynamic fan according to claim 1, characterized in that, The air inlet section of the air guide tube (1) has a circular cross-section, the air outlet section of the air guide tube (1) has a square cross-section, the outer cross-section of the air gathering tube (4) has a square cross-section, and the outer wall of the air gathering tube (4) is spaced apart from the inner wall of the air guide tube (1).

5. The perturbation jet aerodynamic fan according to claim 3, characterized in that, The air-collecting duct (4) has air guide holes at its four corners along its length.

6. The perturbation jet aerodynamic fan according to claim 4, characterized in that, The air outlet section of the air duct (1) is provided with a directional plate (11) on both sides. The directional plate (11) is fitted into the side wall of the air duct (1). The end of the directional plate (11) near the motor (2) is hinged to the side wall of the air duct (1).

7. The perturbation jet aerodynamic fan according to claim 4, characterized in that, The air outlet section of the air duct (1) is vertically provided with air distribution plates (12) on both sides of the end near the motor (2). The end of the air distribution plate (12) facing the air gathering tube (4) is hinged to the air duct (1). The air distribution plate (12) and the air duct (1) are hinged at intervals on the side wall of the air outlet section of the air duct (1).

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