Axial flow fan

Abstract

The utility model discloses an axial flow fan, which belongs to the technical field of axial flow fans, and comprises an outer cylinder and a rotating cylinder, the rotating cylinder is rotatably connected in the outer cylinder, and the side wall of the outer cylinder is fixedly connected with fan blades; one end of the rotating cylinder is a top, and the top is connected with the rotating cylinder through an inclined plane; the fan blades extend to the inclined surface; by means of the design that the fan blades extend to the inclined face, the fan blades can drive more airflow to enter the outer barrel, then on the premise that the rotating speed of the fan is not increased, the air pressure is increased, the heat dissipation effect on electronic components is guaranteed, meanwhile, the rotating speed of the fan is not increased, and the service life is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of axial flow fan, especially a kind of axial flow fan. BACKGROUND

[0002] Axial flow fan is a common wind power transmission device, it generates airflow by rotating blade, its design makes air flow along the direction of axis, therefore being called axial flow fan.

[0003] Axial flow fan is usually composed of a rotating shaft and a group of blades, when motor or engine starts, shaft starts to rotate, simultaneously drives blade to rotate, the modeling and angle of blade make air be pushed in the process of rotation, and form a airflow along the direction of axis, because this characteristic, it is widely used to cool electronic components.

[0004] However, the existing axial flow fan, when cooling electronic components, since fan blade is all concentrated in side wall, leading to less air intake, low wind pressure, influence heat dissipation effect, if want to improve wind pressure, need to improve fan rotating speed, this reduces working life, in view of this problem, a kind of axial flow fan is presented. UTILITARY MODEL CONTENT

[0005] The utility model aims at solving the technical problem in the prior art that fan blade is all concentrated in side wall, leading to less air intake, low wind pressure, influence heat dissipation effect, and proposes a kind of axial flow fan.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A kind of axial flow fan, including outer tube and rotating cylinder, the rotating cylinder is rotationally connected in outer tube, the side wall of outer tube is fixedly connected with fan blade;The top of the one end of rotating cylinder, the top is connected between rotating cylinder by inclined surface;Fan blade extends to inclined surface.

[0008] Preferably, the number of fan blade is 4-8.

[0009] Preferably, it further includes bottom plate;The end of outer tube away from top is fixedly connected with bottom plate by flow guide plate.

[0010] Preferably, the side wall of bottom plate is fixedly connected with motor, and the inner wall of rotating cylinder is fixedly connected with driving shaft;The output end of motor is fixedly connected with driving shaft.

[0011] Preferably, the side wall of outer tube is equipped with threading groove.

[0012] Compared with prior art, the utility model provides a kind of axial flow fan, with the following beneficial effects:

[0013] The axial flow fan can drive more air flow into the outer cylinder through the design of extending the fan blade to the inclined surface, thereby improving the air pressure without increasing the fan rotating speed, ensuring the heat dissipation effect of the electronic components, and without increasing the fan rotating speed, thereby ensuring the working life. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structure diagram of the axial flow fan is provided for the utility model Figure One

[0015] Figure 2 A structure diagram of the axial flow fan is provided for the utility model Figure Two

[0016] Figure 3 A structure diagram of the fan blade of the axial flow fan is provided for the utility model Figure One

[0017] Figure 4 A structure diagram of the fan blade of the axial flow fan is provided for the utility model Figure Two

[0018] Figure 5 A side view of the fan blade of the axial flow fan is provided for the utility model.

[0019] In the figure: 1, outer cylinder; 101, bottom plate; 102, guide plate; 103, threading groove; 2, rotating cylinder; 201, top; 202, inclined surface; 3, fan blade; 4, driving shaft. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0021] In the description of the utility model, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0022] Embodiment:

[0023] Reference Figures 1-5 ​​​​The axial flow fan comprises an outer cylinder 1 and a rotating cylinder 2, the outer cylinder 1 and the rotating cylinder 2 are both in the shape of a cylinder, the rotating cylinder 2 is rotationally connected in the outer cylinder 1, a plurality of fan blades 3 are fixedly connected to the side wall of the outer cylinder 1, the number of the fan blades 3 is 4-8, the fan blades 3 are circumferentially and equidistantly distributed on the outer wall of the rotating cylinder 2, and the number of the fan blades 3 is preferably 5.

[0024] One end of the rotating cylinder 2 is a top portion 201, the top portion 201 is connected with the rotating cylinder 2 through an inclined surface 202; the fan blades 3 extend to the inclined surface 202, that is to say, the side wall of the rotating cylinder 2 and the inclined surface 202 are both provided with the fan blades 3.

[0025] During operation, the rotating cylinder 2 rotates, air is brought into the outer cylinder 1 through the fan blades 3, and then the air goes out from the other end, the design that the fan blades 3 extend to the inclined surface 202 can bring more air into the outer cylinder 1, so that the wind pressure is improved without increasing the rotating speed of the fan, the heat dissipation effect of the electronic components is ensured, and the service life is also ensured.

[0026] The axial flow fan disclosed in the embodiment further comprises a bottom plate 101; one end of the outer cylinder 1 away from the top portion 201 is fixedly connected with the bottom plate 101 through a flow guide plate 102.

[0027] As Figure 2 , the outer cylinder 1 and the bottom plate 101 have a gap, and the gap is connected through the inclined flow guide plate 102, and the number of the flow guide plates 102 is 5-15.

[0028] The flow direction of the air flow can be controlled through the flow guide plate 102.

[0029] The side wall of the bottom plate 101 is fixedly connected with a motor, and the inner wall of the rotating cylinder 2 is fixedly connected with a driving shaft 4; the output end of the motor is fixedly connected with the driving shaft 4.

[0030] The motor is located in the outer cylinder 1, the rotating cylinder 2 is driven to rotate by the motor, and then the fan blades 3 are driven to rotate.

[0031] The side wall of the outer cylinder 1 is provided with a threading groove 103, the threading groove 103 is used for connecting the electric wire to pass through the threading groove 103 when the motor is installed, so as to avoid interference during installation.

[0032] The above is only a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. An axial flow fan, comprising an outer cylinder (1) and a rotating cylinder (2), the rotating cylinder (2) being rotatably connected in the outer cylinder (1), characterized in that: the side wall of the outer cylinder (1) is fixedly connected with a fan blade (3); one end of the rotating cylinder (2) is a top (201), the top (201) and the rotating cylinder (2) are connected through an inclined surface (202); the fan blade (3) extends to the inclined surface (202).

2. An axial fan as claimed in claim 1, characterized in that The number of the fan blade (3) is 4-8.

3. An axial fan as claimed in claim 2, characterised in that The number of the fan blade (3) is 5.

4. An axial fan as claimed in claim 1, characterized in that Further comprising a bottom plate (101); the end of the outer cylinder (1) away from the top (201) is fixedly connected with the bottom plate (101) through a guide plate (102).

5. An axial fan as claimed in claim 4, wherein The side wall of the bottom plate (101) is fixedly connected with a motor, and the inner wall of the rotating cylinder (2) is fixedly connected with a driving shaft (4); the output end of the motor is fixedly connected with the driving shaft (4).

6. An axial fan as claimed in claim 1, characterized in that The side wall of the outer cylinder (1) is provided with a threading groove (103).

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