A supercharging fan

Abstract

The application relates to a supercharged fan, which relates to the technical field of fans. The supercharged fan comprises a hub in a semispherical shape and a plurality of blades with a circular arc profile, the hub is installed on a motor, the plurality of blades are fixed on the periphery of the hub in a ring array distribution with the central axis of the hub as a central axis, and an upper air duct opening is formed between two adjacent blades and the hub. According to the above technical scheme, the semispherical hub is beneficial to smooth airflow into the upper air duct opening. In addition, the upper air duct opening is an arc-shaped air duct, and the diameter of the air duct is reduced when the fan inhales air. Compared with the airflow smoothness of the air duct formed by two adjacent flat blades, the airflow smoothness of the air duct of the application is higher, the air resistance is greatly reduced, and therefore the air pressure of the fan of the application is relatively larger and the noise is lower under the use of the fan with the same power.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to a booster fan. Background Technology

[0002] A fan is a machine that uses input mechanical energy to increase gas pressure and discharge gas; it is a type of driven fluid machinery. Fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling; in boilers and industrial furnaces for ventilation and induced draft; in air conditioning equipment and household appliances for cooling and ventilation; in grain drying and conveying; as a wind source for wind tunnels; and in air-cushioned vehicles for inflation and propulsion.

[0003] As an important component of a wind turbine, the shape and structure of the blade assembly directly affect the wind pressure and working efficiency generated during wind turbine operation. The blade assembly usually includes a hub and several blades that are fixed in a ring around the hub. In the existing technology, the hub is often designed as a cylinder and the blades are flat. When the wind turbine is working, the wind resistance is large, which leads to a significant reduction in the wind pressure output by the wind turbine and also generates a lot of noise. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a booster fan. The hemispherical hub design facilitates smooth airflow into the upper air duct. Furthermore, the upper air duct is an arc-shaped air duct, and the fan inlet diameter is reduced when air enters. Compared to the air duct formed by two adjacent flat blades, the airflow is smoother and the wind resistance is greatly reduced. Therefore, when using a fan of the same power, the wind pressure of this application is relatively greater and the noise is lower.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a booster fan, comprising: a housing, a motor, and a fan blade assembly. The housing has a contour that tapers from the outside to the inside from the middle to the air inlet. The motor is installed inside the housing and close to the air outlet. The fan blade assembly includes a hemispherical hub and several blades with arc-shaped contours. The hub is mounted on the motor. The several blades are arranged in a circular array around the central axis of the hub and fixed to the outer periphery of the hub. An upper air duct is formed between two adjacent blades and the hub.

[0006] Furthermore, the lower ends of the blades are all flush with the bottom of the hub, the upper ends of the blades extend to the top of the hub, and the width of the upper air duct increases sequentially from the air inlet to the air outlet.

[0007] Furthermore, all the blades are mounted at an angle on the hub.

[0008] Furthermore, the blade's outer contour apex is chamfered, and the upper end of each blade has an arc surface extending outward from the hub, with a smooth transition between the upper end and the middle of the blade.

[0009] Furthermore, the hub is hollow inside, and a rotating rod is fixed at the center inside the hub. The rotating rod is fixedly connected to the output end of the motor, and a spring is installed between the rotating rod and the motor.

[0010] Furthermore, a reinforcing component is installed inside the wheel hub, and the reinforcing component is fixedly connected to the rotating rod.

[0011] Furthermore, the reinforcement component includes several rings and connecting pieces. The rings are distributed concentrically with the hub and are all fixed inside the hub. The innermost connecting piece is fixed to the innermost ring and fixedly connected to the rotating rod. The remaining connecting pieces are respectively fixed between two adjacent rings.

[0012] Furthermore, the housing includes a detachably connected upper air guide shroud and a lower air guide shroud. The diameter of the upper air guide shroud decreases sequentially from bottom to top. The diameter of the bottom of the upper air guide shroud is equal to the diameter of the lower air guide shroud. The motor is mounted on the lower air guide shroud.

[0013] Furthermore, a mounting base is provided inside the lower air guide shroud, the motor is mounted on the mounting base, and several air guide vanes are obliquely fixed between the lower air guide shroud and the mounting base in a ring-shaped distribution. A lower air duct is formed between two adjacent air guide vanes, the lower air guide shroud, and the mounting base.

[0014] Furthermore, the outline of the air guide vane is arc-shaped.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are as follows: When the motor is powered on, it drives the hub and several blades on the hub to rotate, forming airflow. The airflow enters the upper air duct along the hub. The hemispherical design of the hub facilitates the smooth entry of airflow into the upper air duct. The arc-shaped design of the blades makes the upper air duct form an arc-shaped air duct. Compared with the air duct formed by two adjacent flat blades, the airflow is smoother and the wind resistance is greatly reduced. In addition, since the profile of the casing from the middle to the air inlet end is narrowed from the outside to the inside, the diameter of the fan inlet is smaller, which can effectively increase the wind pressure. Therefore, with the use of a fan of the same power, the wind pressure of this application is relatively greater and the noise is lower. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the wind turbine assembly structure of this utility model; Figure 2 This is a utility model Figure 1 Top view of the structure; Figure 3 This is another structural schematic diagram of the fan blade assembly of this utility model; Figure 4 This is a schematic diagram of the main cross-sectional structure of the booster fan of this utility model; Figure 5 This is a schematic diagram of the booster fan structure of this utility model; Figure 6 This is a schematic diagram of the fan blade assembly and lower air guide cover structure of this utility model; Figure 7 This is a schematic diagram of the motor and lower air guide cover structure of this utility model; Figure 8 This is the utility model Figure 7 Top view of the structure; Figure 9 This is an exploded view of the booster fan of this utility model; Figure 10 This is another exploded view of the booster fan of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1. Upper air guide shroud, 2. Hub, 3. Blade, 4. Motor, 5. Lower air guide shroud, 6. Spring, 7. Rotating rod, 8. Ring, 9. Connecting piece, 10. Mounting base, 11. Air guide plate, 12. Upper air duct opening a, 13. Lower air duct opening b. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0021] This embodiment relates to a booster fan, such as... Figure 1 , 2As shown in Figures 4 and 5, the device includes a housing, a motor 4, and a fan blade assembly. The housing's profile tapers inward from the center towards the air inlet. The motor 4 is installed inside the housing and near the air outlet. The fan blade assembly includes a hemispherical hub 2 and several blades 3 with arc-shaped profiles. The hub 2 is mounted on the motor 4. The blades 3 are arranged in a circular array around the central axis of the hub 2 and fixed to the periphery of the hub 2. An upper air duct a is formed between two adjacent blades 3 and the hub 2. When the motor 4 is energized, it drives the hub 2 and the blades 3 on the hub 2 to rotate. The movement creates airflow, which flows along the hub 2 into the upper air duct a. The hemispherical design of the hub 2 facilitates smooth airflow into the upper air duct a. The arc-shaped design of the blades 3 creates an arc-shaped air duct at the upper air duct a. Compared to the air duct formed by two adjacent flat blades 3, the airflow is smoother and the wind resistance is greatly reduced. In addition, since the profile of the casing contracts from the outside to the inside from the middle to the air inlet, the diameter of the fan inlet becomes smaller, which can effectively increase the wind pressure. Therefore, under the use of the same power fan, the wind pressure of this application is relatively greater and the noise is lower.

[0022] Specifically, the lower ends of blades 3 are flush with the bottom of hub 2, and the upper ends of blades 3 extend to the top of hub 2. When the fan is working, it can quickly receive the airflow flowing along the top of hub 2. The width of the upper air duct a increases from the air inlet to the air outlet. This setting allows the high-pressure airflow to be gradually depressurized and guided out, which can further reduce the generation of noise.

[0023] Furthermore, the blades 3 are all installed at an angle on the hub 2. It should be noted that the rotation direction of the blades 3 is the same as the airflow direction of the upper air duct a. If the rotation direction of the blades 3 and the airflow direction of the upper air duct a are both clockwise or counterclockwise, the airflow will have a certain direction under the fanning of the blades 3. The above settings can efficiently guide the airflow, resulting in greater wind pressure and lower noise compared to existing fans.

[0024] In addition, the chamfered corners of the outer contour of blade 3 further reduce wind resistance. Furthermore, the upper end of blade 3 has an arc surface extending outward from the hub 2, and the upper end and middle of blade 3 transition smoothly, which can better receive the airflow introduced from the hub 2.

[0025] like Figure 3 As shown, the hub 2 is hollow inside, and a rotating rod 7 is fixed in the center of the hub 2. The rotating rod 7 is fixedly connected to the output end of the motor 4. When the motor 4 is working, it will drive the rotating rod 7 to rotate, thereby driving the entire fan blade assembly to rotate. A spring 6 is installed between the rotating rod 7 and the motor 4. The impact force generated when the motor 4 starts or stops or when the load changes suddenly will be absorbed by the spring 6, which can prevent the fan blade assembly from shaking.

[0026] Furthermore, a reinforcing component is installed inside the wheel hub 2. The reinforcing component is fixedly connected to the rotating rod 7. The setting of the reinforcing component increases the connection strength between the wheel hub 2 and the rotating rod 7, which can extend the service life of the wheel hub 2 and the rotating rod 7.

[0027] Specifically, the reinforcing component includes several rings 8 and connecting pieces 9. The rings 8 are concentrically distributed with the hub 2 and are all fixed inside the hub 2. The innermost connecting piece 9 is fixed to the innermost ring 8 and fixedly connected to the rotating rod 7. The remaining connecting pieces 9 are fixed between two adjacent rings 8. While increasing the connection strength between the hub 2 and the rotating rod 7, the rings 8 and connecting pieces 9 also divide the interior of the hub 2 into several cavities, which can prevent turbulence caused by airflow entering the hub 2 and improve the stability of the hub 2 during rotation.

[0028] Specifically, the housing includes an upper air guide shroud 1 and a lower air guide shroud 5 with detachable connections (such as threaded connections, bolt connections, snap-fit ​​connections, etc.), which facilitates the installation and removal of the upper air guide shroud 1 and the lower air guide shroud 5. In order to increase the air pressure of the fan, the diameter of the upper air guide shroud 1 is designed to decrease from bottom to top. The diameter of the bottom of the upper air guide shroud 1 is equal to the diameter of the lower air guide shroud 5, that is, the inlet diameter of the fan becomes smaller when the air enters, which can effectively increase the air pressure. The motor 4 is installed on the lower air guide shroud 5.

[0029] like Figure 4 , 6 As shown in Figure -8, a mounting base 10 is provided inside the lower air guide shroud 5. The motor 4 is mounted on the mounting base 10. Several air guide vanes 11 arranged in a ring are obliquely fixed between the lower air guide shroud 5 and the mounting base 10. The outline of the air guide vanes 11 is arc-shaped. The lower air duct b is formed between two adjacent air guide vanes 11, the lower air guide shroud 5, and the mounting base 10, making the lower air duct b also an arc-shaped air duct. It should be noted that the airflow direction of the lower air duct b is the same as that of the upper air duct a, which is either clockwise or counterclockwise. And because the air guide vanes 11 are arc-shaped... The outline of 1 is arc-shaped and inclined, which is conducive to the efficient and smooth flow of air in the upper air duct a to the lower air duct b, greatly reducing wind resistance, reducing air volume loss, and generating lower noise. When the airflow is guided to the middle of the arc-shaped air guide 11, the airflow can be accelerated, and the airflow will swirl and concentrate in one place when it is discharged, which has a wind gathering effect. Compared with the wind speed generated by the outward dispersion of the airflow of the existing technology, the wind speed is higher and the air volume is larger. The lower air duct b is used to export the airflow from the wind fan.

[0030] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A booster fan, characterized in that, include: The casing, motor (4), and fan blade assembly are provided. The casing's outline tapers from the outside to the inside from the middle to the air inlet. The motor (4) is installed inside the casing and close to the air outlet. The fan blade assembly includes a hemispherical hub (2) and several blades (3) with arc-shaped outlines. The hub (2) is installed on the motor (4). Several blades (3) are arranged in a ring array around the central axis of the hub (2) and fixed to the outer periphery of the hub (2). An upper air duct (a) is formed between two adjacent blades (3) and the hub (2).

2. A booster fan according to claim 1, characterized in that: The lower ends of the blades (3) are flush with the bottom of the hub (2), and the upper ends of the blades (3) extend to the top of the hub (2). The width of the upper air duct (a) increases sequentially from the air inlet to the air outlet.

3. A booster fan according to claim 1, characterized in that: The blades (3) are all mounted obliquely on the hub (2).

4. A booster fan according to claim 1, characterized in that: The blade (3) has a chamfered corner at the outer contour of the blade (3), and the upper end of the blade (3) has an arc surface extending outward from the hub (2). The upper end of the blade (3) and the middle part are smoothly transitioned.

5. A booster fan according to claim 1, characterized in that: The hub (2) is hollow inside. A rotating rod (7) is fixed in the center of the hub (2). The rotating rod (7) is fixedly connected to the output end of the motor (4). A spring (6) is installed between the rotating rod (7) and the motor (4).

6. A booster fan according to claim 5, characterized in that: The hub (2) is equipped with a reinforcement component, which is fixedly connected to the rotating rod (7).

7. A booster fan according to claim 6, characterized in that: The reinforcement component includes several rings (8) and connecting pieces (9). The rings (8) are distributed with the same center as the hub (2) and are all fixed inside the hub (2). The innermost connecting piece (9) is fixed to the innermost ring (8) and fixedly connected to the rotating rod (7). The remaining connecting pieces (9) are respectively fixed between two adjacent rings (8).

8. A booster fan according to claim 1, characterized in that: The housing includes a detachably connected upper air guide shroud (1) and a lower air guide shroud (5). The diameter of the upper air guide shroud (1) decreases from bottom to top. The diameter of the bottom of the upper air guide shroud (1) is equal to the diameter of the lower air guide shroud (5). The motor (4) is mounted on the lower air guide shroud (5).

9. A booster fan according to claim 8, characterized in that: The lower air guide shroud (5) is provided with a mounting base (10), the motor (4) is mounted on the mounting base (10), and a number of air guide plates (11) arranged in a ring are fixed at an inclination between the lower air guide shroud (5) and the mounting base (10). A downdraft opening (b) is formed between two adjacent air guide plates (11), the lower air guide shroud (5) and the mounting base (10).

10. A booster fan according to claim 9, characterized in that: The outline of the air guide plate (11) is arc-shaped.

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