EC axial flow fan of 24V permanent magnet brushless direct current motor

Abstract

The invention belongs to the technical field of fans, particularly relates to an EC axial flow fan of a 24V permanent magnet brushless direct current motor, and provides the following scheme aiming at the problems that blades used in an existing air conditioner outdoor unit are lack of corresponding supporting effects and are easy to damage a motor in the operation process: the EC axial flow fan comprises a panel, an air inlet hole is formed in the panel, and an air outlet hole is formed in the panel; the EC axial flow fan comprises a panel, four installation rods are symmetrically and fixedly installed on one side of the panel, the same supporting frame is fixedly installed at one ends of the four installation rods, a grid is installed in an air inlet hole, and the EC axial flow fan further comprises a supporting mechanism installed on one side of the panel; after the supporting shaft and the motor are in butt joint and clamped connection, stable positioning installation and rotary supporting of the supporting shaft can be achieved, so that when the blade rotates, damage to an output shaft of the motor can be reduced, and a good protection effect can be provided for the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to an EC axial flow fan of a 24V permanent magnet brushless DC motor. Background Art

[0002] EC axial flow fan is a permanent magnet synchronous motor fan driven by electronic commutation technology. It uses an electronic controller to achieve precise control of motor speed, air volume, pressure and other parameters, thereby achieving high efficiency, energy saving and low noise operation. The working principle of EC axial flow fan is based on the operating principle of permanent magnet synchronous motor, combined with electronic commutation technology. The motor is powered by a built-in DC power supply, and an electronic controller is used to convert DC power into three-phase AC power to drive the motor to rotate. At the same time, the electronic controller adjusts the motor speed and output power in real time according to system requirements to achieve better operation results;

[0003] At present, the axial flow fans used in the outdoor units of air conditioners generally install the blades directly on the output shaft of the motor, lacking the corresponding support. If a certain amount of dust adheres to the blades during operation, the overall center of the blades will be unstable. When the motor rotates, centrifugal force will be generated on the output shaft of the motor. When used for a long time, it is easy to cause damage to the motor. Therefore, we propose an EC axial flow fan with a 24V permanent magnet brushless DC motor to solve the above-mentioned problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art that the blades used in the current air conditioner outdoor unit lack corresponding support and are prone to damage to the motor during operation, and to propose an EC axial flow fan with a 24V permanent magnet brushless DC motor.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An EC axial flow fan of a 24V permanent magnet brushless DC motor comprises a panel, an air inlet is provided on the panel, four mounting rods are symmetrically fixedly installed on one side of the panel, a same support frame is fixedly installed on one end of the four mounting rods, a grille is installed in the air inlet, and the EC axial flow fan also comprises:

[0007] A supporting mechanism, the supporting mechanism is installed on one side of the panel;

[0008] An air suction mechanism, the air suction mechanism passes through the supporting mechanism and is connected to the supporting mechanism;

[0009] The power mechanism is installed on one side of the support frame, one side of the power mechanism passes through the support frame and is clamped with the suction mechanism, and the power mechanism is used to drive the suction mechanism to operate.

[0010] In a possible design, the support mechanism includes a support sleeve that passes through the mounting frame and is fixedly connected to the mounting frame, a clamping ring is rotatably connected inside the support sleeve, a sleeve is fixedly installed inside the clamping ring, slots are provided on the top inner wall and the bottom inner wall of the sleeve, and the suction mechanism passes through the sleeve and is clamped in the two slots respectively.

[0011] In a possible design, the support sleeve is provided with an oil storage cavity, a plurality of oil outlet holes are formed at equal intervals on the inner wall of one side of the oil storage cavity, an annular positioning opening is formed on the retaining ring, a plurality of balls are movably embedded at equal intervals on the inner wall of the annular positioning opening, one side of the balls are in contact with the inner wall of the support sleeve, an oil filling hole is formed on the inner wall of the other side of the oil storage cavity, an oil filling pipe is fixedly installed in the oil filling hole, the top end of the oil filling pipe extends to the top of the support sleeve, and a sealing plug is sealed in the oil filling pipe.

[0012] In a possible design, both sides of the sleeve are rotatably connected with clamps, and the four clamps are clamped with the suction mechanism. Two support plates are symmetrically fixedly installed on the bottom of both sides of the sleeve, and arc-shaped clamping plates are connected to the support plates. Sliding holes are opened on the arc-shaped clamping plates, and one side of the support plate extends into the sliding hole and is slidably connected to the inner wall of the sliding hole. A stopper is fixedly installed at the bottom of the clamp, and the arc-shaped clamping plate is clamped with the corresponding stopper. A compression spring is fixedly installed on one side of the support plate, and one end of the compression spring is fixedly connected to the inner wall of one side of the sliding hole.

[0013] In a possible design, the suction mechanism includes a support shaft that passes through the sleeve and contacts the inner wall of the sleeve, a blade is fixedly installed on one end of the support shaft, two positioning plates are symmetrically fixedly installed on the support shaft, one side of the positioning plate extends into the corresponding slot and is clamped with the inner wall of the slot, and the other end of the support shaft is connected to the power mechanism.

[0014] In a possible design, two annular bayonet holes are provided on the support shaft, and one side of the clamp extends into the corresponding annular bayonet holes and contacts the inner wall of the annular bayonet holes.

[0015] In one possible design, the power mechanism includes a motor fixedly mounted on one side of a support frame, the motor is electrically connected to a controller, the output shaft of the motor passes through the support frame and is installed with a docking assembly, and the docking assembly is connected to the other end of the support shaft.

[0016] In one possible design, the docking assembly includes a connecting disk fixedly mounted on the motor output shaft, a rectangular slot is formed on one side of the connecting disk, a rectangular block is fixedly mounted on the other end of the support shaft, one side of the rectangular block extends into the rectangular slot and is clamped with the inner wall of the rectangular slot, a docking ring is fixedly mounted on one side of the connecting disk, and the docking ring is mounted on the other end of the support shaft.

[0017] In the present application, during assembly, the support shaft can be passed through the sleeve and the positioning plug plate can be snap-fitted with the corresponding slot, so that the support shaft and the sleeve can be stably connected. Then, the clamp can be rotated to transmit the clamp to the corresponding annular bayonet, so that the curved surface at the bottom of the block can contact the curved surface at the top of the arc-shaped clamping plate. After that, as the block moves, the corresponding arc-shaped clamping plate can be moved to compress the compression spring until the clamp moves to the corresponding annular bayonet for clamping, and the arc-shaped clamping plate will release the limit. The compression spring in a stressed state can push the arc-shaped clamping plate to move in the opposite direction, blocking and limiting the block. This can enable the clamp to stably clamp the support shaft and limit the position, and when the support shaft passes through the sleeve, the rectangular block can be inserted into the rectangular slot, so that the support shaft and the connecting disk can be quickly connected. Then, the lubricating oil is injected into the oil storage chamber through the oil filling pipe, and the oil filling pipe is sealed with a sealing plug. At this time, the lubricating oil in the oil storage chamber can flow out through multiple oil outlet holes, so as to lubricate multiple ball bearings, thereby lubricating and protecting the ball bearings and reducing the friction loss of the ball bearings. In this way, when the connecting disk rotates with the output shaft of the motor, it can drive the support shaft to rotate, thereby driving the blades to rotate.

[0018] Beneficial effects: In the present invention, the EC axial flow fan of the 24V permanent magnet brushless DC motor can stably support the suction mechanism in rotation when the suction mechanism is supported and installed by utilizing the rotation connection of the support sleeve and the clamp ring, so that the centrifugal force on the power mechanism can be reduced when the suction mechanism is running, thereby protecting the power mechanism;

[0019] When the clamping ring rotates, the resistance of the clamping ring during rotation can be reduced under the rolling support of the multiple balls, so that when the power mechanism drives the suction mechanism to operate, the operating resistance can be reduced, and after the lubricating oil is injected into the oil storage cavity through the oil filling pipe, the lubricating oil in the oil storage cavity can flow out through the multiple oil outlet holes to lubricate the multiple balls, so that the balls can be lubricated and protected, and the friction loss of the balls can be reduced;

[0020] In the present invention, the EC axial flow fan of the 24V permanent magnet brushless DC motor can be stably connected to the sleeve by the suction mechanism when the support shaft passes through the sleeve and the positioning plug plate is engaged with the corresponding slot. After the support shaft receives the driving force of the power mechanism, it can rotate, and the sleeve can support the support shaft for rotation.

[0021] And by passing the support shaft through the sleeve and inserting the rectangular clamping block into the rectangular clamping slot, the support shaft and the connecting disk can be quickly clamped, so that when the connecting disk rotates with the output shaft of the motor, the support shaft can be driven to rotate, so that the blades can be driven to rotate;

[0022] In the present invention, the EC axial flow fan of the 24V permanent magnet brushless DC motor can drive the support shaft to rotate through the power mechanism by starting the motor through the transmission of the docking assembly, and at this time, the blades can be driven to run stably. At the same time, a controller is connected to the motor, and the controller can control the rotation speed of the motor when receiving the background operation instruction;

[0023] After the support shaft is docked and clamped with the motor, the present invention can achieve stable positioning installation and rotation support of the support shaft, so that when the blades rotate, the damage to the motor output shaft can be reduced, and a good protection effect can be provided for the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional schematic diagram of the first-view structure of an EC axial flow fan with a 24V permanent magnet brushless DC motor proposed by the present invention;

[0025] Figure 2 A three-dimensional schematic diagram of the structure of an EC axial flow fan with a 24V permanent magnet brushless DC motor proposed by the present invention from a second perspective;

[0026] Figure 3 A three-dimensional schematic diagram of the motor and blade clamping structure of an EC axial flow fan of a 24V permanent magnet brushless DC motor proposed by the present invention;

[0027] Figure 4 A three-dimensional schematic diagram of a support sleeve, a clamping ring, a support shaft and a blade connection structure of an EC axial flow fan of a 24V permanent magnet brushless DC motor proposed by the present invention;

[0028] Figure 5 A three-dimensional schematic diagram of the supporting shaft and two clamp connection structures of an EC axial flow fan of a 24V permanent magnet brushless DC motor proposed by the present invention;

[0029] Figure 6 A three-dimensional schematic diagram of the motor, support sleeve and blade separation structure of an EC axial flow fan of a 24V permanent magnet brushless DC motor proposed by the present invention;

[0030] Figure 7 A three-dimensional schematic diagram of the connection structure of the motor, connection disk and docking ring of an EC axial flow fan of a 24V permanent magnet brushless DC motor proposed by the present invention.

[0031] In the figure: 1. panel; 2. mounting rod; 3. support frame; 4. grille; 5. mounting frame; 6. support sleeve; 7. retaining ring; 8. annular positioning opening; 9. ball bearing; 10. oil storage chamber; 11. oil outlet hole; 12. oil filling pipe; 13. sealing plug; 14. support shaft; 15. blade; 16. rectangular block; 17. annular bayonet; 18. positioning plug plate; 19. sleeve; 20. slot; 21. clamp; 22. block; 23. support plate; 24. arc-shaped retaining plate; 25. compression spring; 26. motor; 27. controller; 28. connecting plate; 29. ​​docking ring; 30. rectangular slot. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0033] Example 1

[0034] Reference Figure 1-7 A fan, which is used in the field of fan technology, comprises a panel 1, and an air inlet is provided at the center of the panel 1 for introducing external air. Four mounting rods 2 are symmetrically fixedly installed on one side of the panel 1, specifically the side away from the air inlet, and the four mounting rods 2 are jointly supported and fixedly connected to a support frame 3. A grille 4 is provided inside the air inlet to prevent large-sized particles or foreign objects from entering the fan.

[0035] In addition, the EC axial flow fan also includes a supporting mechanism, an air suction mechanism and a power mechanism.

[0036] The support mechanism is installed on one side of the air inlet of the panel 1, and the specific structure is as follows: first, a through-type mounting frame 5 is fixedly installed on the panel 1, and a support sleeve 6 is fixedly connected to the mounting frame 5 by welding or bolts. A clamping ring 7 is rotatably connected to the support sleeve 6, and the clamping ring 7 and the support sleeve 6 can rotate smoothly relative to each other. At the central position of the clamping ring 7, a sleeve 19 is penetrated and fixedly installed, and a slot 20 is opened on the top inner wall and the bottom inner wall of the sleeve 19.

[0037] The suction mechanism passes through the sleeve 19 of the support mechanism and is connected to the sleeve 19. The suction mechanism specifically includes a support shaft 14, one end of which is fixedly mounted with a blade 15, which is used to generate suction when rotating to inhale air. Two positioning plugs 18 are also symmetrically fixedly mounted on the support shaft 14. When the support shaft 14 passes through the sleeve 19, the two positioning plugs 18 will be respectively inserted into the slots 20 at the top and bottom of the sleeve 19, thereby achieving a stable connection between the suction mechanism and the support mechanism.

[0038] The power mechanism is installed on one side of the support frame 3 to drive the air suction mechanism to operate. The power mechanism specifically includes a motor 26 fixedly installed on one side of the support frame 3. The output shaft of the motor 26 passes through the support frame 3 and is connected to a docking assembly. The docking assembly is connected to the other end of the support shaft 14 to transmit the driving force of the motor 26 to the support shaft 14.

[0039] Specifically, the docking assembly includes a connection disk 28 fixedly mounted on the output shaft of the motor 26, and a rectangular slot 30 is provided on one side of the connection disk 28. A rectangular block 16 is fixedly mounted on the other end of the support shaft 14, and when the support shaft 14 is installed in place, the rectangular block 16 will be inserted into the rectangular slot 30, thereby achieving a stable connection between the power mechanism and the suction mechanism. At the same time, a docking ring 29 is also fixedly mounted on one side of the connection disk 28, and the docking ring 29 is sleeved on the other end of the support shaft 14, further enhancing the stability of the connection.

[0040] In order to further optimize the performance of the fan, this embodiment also provides an oil storage chamber 10 on the support sleeve 6, and a plurality of oil outlet holes 11 are evenly spaced on the inner wall of one side of the oil storage chamber 10. An annular positioning opening 8 is provided on the retaining ring 7, and a plurality of balls 9 are movably embedded at equal intervals on the inner wall of the annular positioning opening 8, and one side of these balls 9 is in contact with the inner wall of the support sleeve 6, thereby reducing the resistance of the retaining ring 7 when rotating. When lubrication is required, lubricating oil can be injected into the oil storage chamber 10 through the oil filling hole on the inner wall of the other side of the oil storage chamber 10. At this time, the lubricating oil in the oil storage chamber 10 will flow out through the plurality of oil outlet holes 11 to lubricate the plurality of balls 9, thereby reducing the friction loss of the balls 9.

[0041] Example 2

[0042] refer to Figure 5, improved on the basis of Example 1: an EC axial flow fan of a 24V permanent magnet brushless DC motor, applied in the field of fan technology, in order to enhance the stability of the installation of the suction mechanism, this embodiment also rotatably connects a clamp 21 on both sides of the sleeve 19, and the four clamps 21 are clamped with the support shaft 14 of the suction mechanism. Two support plates 23 are also symmetrically fixedly installed at the bottom of both sides of the sleeve 19, and each support plate 23 is connected to an arc-shaped clamping plate 24. A sliding hole is opened on the arc-shaped clamping plate 24, and one side of the support plate 23 extends into the sliding hole and is slidably connected to the inner wall of the sliding hole. A stopper 22 is fixedly installed at the bottom of the clamp 21, and the stopper 22 is clamped with the corresponding arc-shaped clamping plate 24. At the same time, a compression spring 25 is also fixedly installed on one side of the support plate 23, and one end of the compression spring 25 is fixedly connected to the inner wall of one side of the sliding hole. When the hoop 21 is turned down to clamp and position the air suction mechanism, the curved surface at the bottom of the stopper 22 will contact the curved surface at the top of the arc-shaped clamping plate 24, and the arc-shaped clamping plate 24 will move with the movement of the stopper 22 to compress the compression spring 25. When the hoop 21 clamps the air suction mechanism, the arc-shaped clamping plate 24 will release the limit, and the compression spring 25 in a stressed state will push the arc-shaped clamping plate 24 to move in the opposite direction, blocking and limiting the stopper 22, thereby achieving stable clamping and limiting of the air suction mechanism by the hoop 21.

[0043] However, as is well known to those skilled in the art, the working principles and wiring methods of the motor 26 and the controller 27 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An EC axial flow fan with a 24V permanent magnet brushless DC motor, comprising a panel (1), an air inlet hole being provided on the panel (1), four mounting rods (2) being symmetrically fixedly mounted on one side of the panel (1), a same support frame (3) being fixedly mounted on one end of the four mounting rods (2), a grille (4) being installed in the air inlet hole, characterized in that: The EC axial flow fan also includes: A supporting mechanism, the supporting mechanism being mounted on one side of the panel (1); An air suction mechanism, the air suction mechanism passes through the supporting mechanism and is connected to the supporting mechanism; The power mechanism is installed on one side of the support frame (3), one side of the power mechanism penetrates the support frame (3) and is clamped with the air suction mechanism, and the power mechanism is used to drive the air suction mechanism to operate.

2. The EC axial flow fan of a 24V permanent magnet brushless DC motor according to claim 1, characterized in that: The support mechanism comprises a support sleeve (6) penetrating the mounting frame (5) and fixedly connected to the mounting frame (5); a clamping ring (7) is rotatably connected inside the support sleeve (6); a sleeve (19) is penetrating and fixedly installed inside the clamping ring (7); slots (20) are provided on the top inner wall and the bottom inner wall of the sleeve (19); and an air suction mechanism penetrates the sleeve (19) and is clamped in two slots (20) respectively.

3. The EC axial flow fan of a 24V permanent magnet brushless DC motor according to claim 2, characterized in that: The support sleeve (6) is provided with an oil storage cavity (10), and a plurality of oil outlet holes (11) are formed at equal intervals on the inner wall of one side of the oil storage cavity (10). The clamping ring (7) is provided with an annular positioning opening (8), and a plurality of balls (9) are movably embedded at equal intervals on the inner wall of the annular positioning opening (8), and one side of the balls (9) is in contact with the inner wall of the support sleeve (6). An oil filling hole is formed on the inner wall of the other side of the oil storage cavity (10), and an oil filling pipe (12) is fixedly installed in the oil filling hole, and the top end of the oil filling pipe (12) extends to the top of the support sleeve (6), and a sealing plug (13) is sealed and clamped in the oil filling pipe (12).

4. The EC axial flow fan of a 24V permanent magnet brushless DC motor according to claim 3, characterized in that: Both sides of the sleeve (19) are rotatably connected with a clamp (21), and the four clamps (21) are clamped with the suction mechanism. Two support plates (23) are symmetrically fixedly installed at the bottom of both sides of the sleeve (19), and an arc-shaped clamping plate (24) is connected to the support plate (23). The arc-shaped clamping plate (24) is provided with a sliding hole. One side of the support plate (23) extends into the sliding hole and is slidably connected to the inner wall of the sliding hole. A stopper (22) is fixedly installed at the bottom of the clamp (21), and the arc-shaped clamping plate (24) is clamped with the corresponding stopper (22). A compression spring (25) is fixedly installed on one side of the support plate (23), and one end of the compression spring (25) is fixedly connected to the inner wall of one side of the sliding hole.

5. The EC axial flow fan of a 24V permanent magnet brushless DC motor according to claim 4, characterized in that: The air suction mechanism comprises a support shaft (14) which passes through the sleeve (19) and contacts the inner wall of the sleeve (19); a blade (15) is fixedly mounted on one end of the support shaft (14); two positioning plug plates (18) are symmetrically fixedly mounted on the support shaft (14); one side of the positioning plug plates (18) extends into a corresponding slot (20) and is clamped with the inner wall of the slot (20); and the other end of the support shaft (14) is connected to the power mechanism.

6. The EC axial flow fan of a 24V permanent magnet brushless DC motor according to claim 5, characterized in that: The support shaft (14) is provided with two annular bayonet holes (17), and one side of the clamp (21) extends into the corresponding annular bayonet holes (17) and contacts the inner wall of the annular bayonet holes (17).

7. The EC axial flow fan of a 24V permanent magnet brushless DC motor according to claim 1, characterized in that: The power mechanism comprises a motor (26) fixedly mounted on one side of the support frame (3), the motor (26) being electrically connected to a controller (27), an output shaft of the motor (26) passing through the support frame (3) and being mounted with a docking assembly, and the docking assembly being connected to the other end of the support shaft (14).

8. The EC axial flow fan of a 24V permanent magnet brushless DC motor according to claim 7, characterized in that: The docking assembly comprises a connecting disk (28) fixedly mounted on the output shaft of the motor (26), a rectangular slot (30) being provided on one side of the connecting disk (28), a rectangular clamping block (16) being fixedly mounted on the other end of the support shaft (14), one side of the rectangular clamping block (16) extending into the rectangular slot (30) and clamped with the inner wall of the rectangular slot (30), and a docking ring (29) being fixedly mounted on one side of the connecting disk (28), and the docking ring (29) being sleeved on the other end of the support shaft (14).

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