Low-noise axial flow fan

Abstract

The utility model relates to the technical field of fans, and discloses a low-noise axial flow fan which comprises a base, a rocking handle is rotationally connected to the interior of the base, a positive and negative screw rod is fixedly connected to the outer wall of the rocking handle, the outer wall of the positive and negative screw rod is rotationally connected to the inner wall of the base, and a moving block is in threaded connection with the outer wall of the positive and negative screw rod. A sliding rail is slidably connected to the inner wall of the moving block, the lower surface of the sliding rail is fixedly connected to the inner wall of the base, a transmission plate is rotatably connected to the outer wall of the moving block, and a fixing block is rotatably connected to the outer wall of the transmission plate. According to the utility model, the rocking handle is rotated to drive the positive and negative screw rod to rotate, so that the positive and negative screw rod drives the transmission plate to rotate through the movable block, and the lifting plate is driven to move up and down through the fixed block to achieve the effect of adjusting the height of the lifting plate, so that the height of the fan can be adjusted according to the air flowing condition, and the fan is positioned in an air stable area; and the effect of reducing noise is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field especially relates to a low noise axial flow fan. BACKGROUND

[0002] A low noise axial flow fan is a kind of axial flow fan specially designed to reduce noise during operation. Axial flow fan is a kind of fan type that air is pushed along the axial direction by blade, usually used for ventilation, cooling, air conditioning and other applications. Its working principle is that air flows along the direction of fan shaft, so it is also called "axial fan".

[0003] Generally, when the fan is running, the surrounding environment (such as wall, ground or other equipment) is easy to cause disturbance of airflow, increase turbulence and noise, and the fan with fixed height is difficult to keep in the area where air flow is more stable, in some places, due to low height, it is easy to cause uneven air flow velocity and turbulence noise. UTILITY MODEL CONTENT

[0004] In order to make up for the above shortcomings, the utility model provides a low noise axial flow fan, which aims at improving the problem that the height cannot be adjusted, so that the fan cannot be in the area where air flow is stable in some places, and turbulence noise is easy to occur.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A low noise axial flow fan, comprising a base, a crank handle is rotatably connected in the inside of the base, a positive and negative screw rod is fixedly connected to the outer wall of the crank handle, the outer wall of the positive and negative screw rod is rotatably connected to the inner wall of the base, a moving block is threadedly connected to the outer wall of the positive and negative screw rod, a slide rail is slidably connected to the inner wall of the moving block, the lower surface of the slide rail is fixedly connected to the inner wall of the base, a transmission plate is rotatably connected to the outer wall of the moving block, a fixed block is rotatably connected to the outer wall of the transmission plate, a lifting plate is fixedly connected to the upper surface of the fixed block, a sliding sleeve is fixedly connected to the lower surface of the lifting plate, the lower surface of the sliding sleeve is fixedly connected to the inner wall of the base, a rotating assembly is arranged on the upper surface of the lifting plate, and the rotating assembly is used to drive the fan blade to rotate.

[0007] Preferably, the rotating assembly comprises a fan barrel, the outer wall of the fan barrel is fixedly connected to the upper surface of the lifting plate, a fixed plate is fixedly connected to the inner wall of the fan barrel, a motor is fixedly connected to the outer wall of the fixed plate, and a fan blade is fixedly arranged at the output end of the motor.

[0008] Preferably, the outer wall of the fan barrel is fixedly connected with a fixed frame, and the outer wall of the fixed frame is fixedly connected with a guide plate.

[0009] Preferably, the inner wall of the fixed frame is slidably connected with a filter screen, and the inner wall of the fixed frame is slidably connected with a limiting plate, and the lower surface of the limiting plate is arranged on the upper surface of the filter screen.

[0010] Preferably, the outer wall of the fixed frame is fixedly connected with a supporting block, and the inner wall of the supporting block is slidably connected with a hollow frame.

[0011] Preferably, the inner wall of the hollow frame is fixedly connected with a spring, and the outer wall of the spring is fixedly connected to the inner wall of the supporting block.

[0012] Preferably, the outer wall of the hollow frame is fixedly connected with a connecting column.

[0013] Preferably, the outer wall of the connecting column is fixedly connected with a clamping block, and the outer wall of the clamping block is arranged on the inner wall of the limiting plate.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the rotating handle drives the forward and reverse screw rod to rotate, drives the transmission plate to rotate through the moving block, drives the lifting plate to move up and down through the fixed block, adjusts the height of the lifting plate, adjusts the height of the fan according to the air flow, makes the fan in the air stable area, and reduces the noise.

[0016] 2. In the utility model, the hollow frame is pulled to drive the connecting column to slide, and the sliding of the connecting column drives the clamping block to slide, when the clamping block slides out of the inner wall of the limiting plate, the limiting plate is pulled out of the inner wall of the fixed frame, and then the filter screen can be pulled out of the inner wall of the fixed frame, the filter screen can be quickly replaced, and the maintenance efficiency is improved. DRAWINGS

[0017] Figure 1 A perspective view of a low-noise axial flow fan is provided for the utility model;

[0018] Figure 2 A forward and reverse screw rod partial structure schematic view of a low-noise axial flow fan is provided for the utility model;

[0019] Figure 3 A fan blade partial structure schematic view of a low-noise axial flow fan is provided for the utility model;

[0020] Figure 4 A filter screen partial structure schematic view of a low-noise axial flow fan is provided for the utility model;

[0021] Figure 5 A spring partial structure schematic view of a low-noise axial flow fan is provided for the utility model.

[0022] Legend:

[0023] 1, base; 2, crank; 3, positive and negative screw rod; 4, moving block; 5, slide rail; 6, transmission plate; 7, fixed block; 8, lifting plate; 9, sliding sleeve; 10, fan cylinder; 11, fixed plate; 12, motor; 13, fan blade; 14, fixed frame; 15, guide plate; 16, filter screen; 17, limiting plate; 18, support block; 19, hollow frame; 20, spring; 21, connecting column; 22, clamping block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the specification of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Referring to Figure 1 and Figure 2 , the present application provides an embodiment: a low-noise axial flow fan, comprising a base 1, a crank 2 is rotatably connected inside the base 1, the crank 2 is fixedly connected with a positive and negative screw rod 3 on the outer wall, the positive and negative screw rod 3 is rotatably connected to the inner wall of the base 1, the outer wall of the positive and negative screw rod 3 is threadedly connected with a moving block 4, the inner wall of the moving block 4 is slidably connected with a slide rail 5, the lower surface of the slide rail 5 is fixedly connected to the inner wall of the base 1, the outer wall of the moving block 4 is rotatably connected with a transmission plate 6, the outer wall of the transmission plate 6 is rotatably connected with a fixed block 7, the upper surface of the fixed block 7 is fixedly connected with a lifting plate 8, the lower surface of the lifting plate 8 is fixedly connected with a sliding sleeve 9, the lower surface of the sliding sleeve 9 is fixedly connected to the inner wall of the base 1, the upper surface of the lifting plate 8 is provided with a rotating assembly, the rotating assembly is used to drive the fan blade 13 to rotate;

[0026] Specifically, the base 1 can play a fixed support role for the handle 2. When the handle 2 is rotated, the rotation of the handle 2 will also drive the forward and reverse screw rod 3 to rotate, and the rotation of the forward and reverse screw rod 3 will also drive the two moving blocks 4 to slide synchronously and oppositely on the outer wall of the slide rail 5. The base 1 can play a fixed support role for the slide rail 5, and the sliding of the moving block 4 will also drive the transmission plate 6 to rotate, and the rotation of the transmission plate 6 will also drive the fixed block 7 to move up and down, and the movement of the fixed block 7 will also drive the lifting plate 8 to move up and down. The movement of the lifting plate 8 will also drive the sliding sleeve 9 to slide up and down. The sliding sleeve 9 can play a supporting role for the lifting plate 8, ensuring the stability of the lifting plate 8 when moving up and down, so that the up and down sliding of the sliding sleeve 9 can drive the fan cylinder 10 to move up and down, adjusting the height of the fan cylinder 10, optimizing the airflow, and adjusting the height of the fan through the lifting device. The fan can be placed in an area where the air flow is more stable, reducing airflow interference and noise.

[0027] With reference to Figure 3 , the rotating assembly includes a fan cylinder 10, the outer wall of the fan cylinder 10 is fixedly connected to the upper surface of the lifting plate 8, the inner wall of the fan cylinder 10 is fixedly connected with a fixed plate 11, the outer wall of the fixed plate 11 is fixedly connected with a motor 12, and the output end of the motor 12 is fixedly provided with a fan blade 13.

[0028] Specifically, the lifting plate 8 can play a fixed support role for the fan cylinder 10, and the fan cylinder 10 can also play a fixed support role for the fixed plate 11, and the fixed plate 11 can also play a fixed support role for the motor 12. When the motor 12 is turned on, the motor 12 will also drive the fan blade 13 to rotate, achieving the effect of turning on the fan.

[0029] With reference to Figure 4 and Figure 5 , the outer wall of the fan cylinder 10 is fixedly connected with a fixed frame 14, and the outer wall of the fixed frame 14 is fixedly connected with a flow guide plate 15. The inner wall of the fixed frame 14 is slidably connected with a filter screen 16, and the inner wall of the fixed frame 14 is slidably connected with a limiting plate 17. The lower surface of the limiting plate 17 is arranged on the upper surface of the filter screen 16. The outer wall of the fixed frame 14 is fixedly connected with a supporting block 18, and the inner wall of the supporting block 18 is slidably connected with a hollow frame 19. The inner wall of the hollow frame 19 is fixedly connected with a spring 20, and the outer wall of the spring 20 is fixedly connected to the inner wall of the supporting block 18. The outer wall of the hollow frame 19 is fixedly connected with a connecting column 21. The outer wall of the connecting column 21 is fixedly connected with a clamping block 22, and the outer wall of the clamping block 22 is arranged on the inner wall of the limiting plate 17.

[0030] Specifically, the fan cylinder 10 can play a fixed support role for the fixed frame 14, and the fixed frame 14 can play a fixed support role for the guide plate 15, which can optimize and guide the airflow to enter the blade more smoothly, reduce sudden changes in airflow and vortex noise, and at the same time, the fixed frame 14 can also play a supporting role for the filter screen 16, which can be slid to the inner wall of the fixed frame 14, and at the same time, the filter screen 16 can avoid discharging pollutants in the air to the external environment, avoid secondary pollution, improve air quality, and the limiting plate 17 can block the filter screen 16, ensuring that the filter screen 16 is fixed to the inner wall of the fixed frame 14, and at the same time, the fixed frame 14 can play a fixed support role for the supporting block 18, and the supporting block 18 can also play a supporting role for the hollow frame 19, when pulling the hollow frame 19, the hollow frame 19 will extrude the spring 20, the spring 20 can drive the hollow frame 19 to push the connecting column 21 and the clamping block 22 to be clamped in the inner wall of the limiting plate 17, and the sliding of the hollow frame 19 will also drive the connecting column 21 to slide, and the sliding of the connecting column 21 will also drive the clamping block 22 to slide, when the clamping block 22 slides out of the inner wall of the limiting plate 17 and slides to the inner wall of the fixed frame 14, the locking of the limiting plate 17 can be released, so that the limiting plate 17 can be pulled out of the inner wall of the fixed frame 14, thereby releasing the limiting of the filter screen 16, so that the filter screen 16 slides out of the inner wall of the fixed frame 14, achieving the effect of quick disassembly.

[0031] Working principle: when the fan needs to be used, first of all, the worker rotates the handle 2, so that the handle 2 drives the forward and reverse screw rod 3 to rotate, and the rotation of the forward and reverse screw rod 3 drives the moving block 4 to slide at the sliding rail 5, and the sliding of the moving block 4 drives the transmission plate 6 to rotate, and the rotation of the transmission plate 6 drives the fixed block 7 to move up and down, thereby driving the lifting plate 8 to move, achieving the effect of adjusting the height of the fan, and the up and down movement of the lifting plate 8 drives the sliding sleeve 9 to slide, and the sliding sleeve 9 can ensure the stability of the movement of the lifting plate 8, when the filter screen 16 needs to be cleaned or replaced, first pull the hollow frame 19, so that the hollow frame 19 drives the connecting column 21 to slide, and the sliding of the connecting column 21 drives the clamping block 22 to slide out of the inner wall of the limiting plate 17, releasing the limiting of the limiting plate 17, then pull the limiting plate 17 out of the inner wall of the fixed frame 14, and then pull the filter screen 16 out of the inner wall of the fixed frame 14, achieving the effect of quick installation and disassembly, that is, the device not only can optimize the airflow, reduce airflow interference and reduce noise by adjusting the height of the fan, but also can easily remove the filter screen 16 for cleaning or replacement without spending too much time or tools, achieving the effect of improving maintenance efficiency.

[0032] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A low noise axial fan comprising a base (1), characterised in that: The inside of base (1) is rotatably connected with crank handle (2), the outer wall of crank handle (2) is fixedly connected with positive and negative screw rod (3), the outer wall of positive and negative screw rod (3) is rotatably connected in the inner wall of base (1), the outer wall of positive and negative screw rod (3) is threadedly connected with moving block (4), the inner wall of moving block (4) is slidably connected with slide rail (5), the lower surface of slide rail (5) is fixedly connected in the inner wall of base (1), the outer wall of moving block (4) is rotatably connected with transmission plate (6), the outer wall of transmission plate (6) is rotatably connected with fixed block (7), the upper surface of fixed block (7) is fixedly connected with lifting plate (8), the lower surface of lifting plate (8) is fixedly connected with sliding sleeve (9), the lower surface of sliding sleeve (9) is fixedly connected in the inner wall of base (1), the upper surface of lifting plate (8) is provided with rotating assembly, rotating assembly is used to drive the rotating effect of fan blade (13).

2. A low noise axial flow fan as claimed in claim 1 wherein: The outer wall of fan cylinder (10) is fixedly connected on the upper surface of lifting plate (8), the inner wall of fan cylinder (10) is fixedly connected with fixed plate (11), the outer wall of fixed plate (11) is fixedly connected with motor (12), the output end of motor (12) is fixedly provided with fan blade (13).

3. A low noise axial fan as claimed in claim 2, characterised in that: The outer wall of fan cylinder (10) is fixedly connected with fixed frame (14), the outer wall of fixed frame (14) is fixedly connected with guide plate (15).

4. A low noise axial fan as claimed in claim 3, characterised in that: The inner wall of fixed frame (14) is slidably connected with filter screen (16), the inner wall of fixed frame (14) is slidably connected with limiting plate (17), the lower surface of limiting plate (17) is arranged on the upper surface of filter screen (16).

5. A low noise axial fan as claimed in claim 4, characterised in that: The outer wall of fixed frame (14) is fixedly connected with supporting block (18), the inner wall of supporting block (18) is slidably connected with hollow frame (19).

6. A low noise axial fan as claimed in claim 5, characterised in that: The inner wall of hollow frame (19) is fixedly connected with spring (20), the outer wall of spring (20) is fixedly connected in the inner wall of supporting block (18).

7. A low noise axial fan as claimed in claim 6, characterised in that: The outer wall of hollow frame (19) is fixedly connected with connecting column (21).

8. A low noise axial fan as claimed in claim 7, characterised in that: The outer wall of connecting column (21) is fixedly connected with clamping block (22), the outer wall of clamping block (22) is arranged in the inner wall of limiting plate (17).

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