CN216894967U

CN216894967U - Heat radiation fan

Info

Publication number: CN216894967U
Application number: CN202122299532.8U
Authority: CN
Inventors: 欧东泽
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-07-05
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a heat radiation fan, wherein a plurality of ribs are connected to the inner wall of the air outlet surface of a fan frame of the heat radiation fan, the other ends of the ribs are connected to a disc at the central position of the bottom surface of the fan frame, the center of the disc is upwards protruded with a pipe, a silicon steel sheet is arranged outside the pipe at the center of the fan frame, an insulating sheet is arranged around the teeth of the silicon steel sheet, a PCB (printed circuit board) is arranged below the insulating sheet and connected with a conductor, a wear-resistant gasket is arranged at the inner bottom of the pipe at the center of the fan frame, a clamping ring is arranged above the wear-resistant gasket, a bearing is arranged above the clamping ring, a rotatable shaft core is arranged inside the bearing, one end of the shaft core is in contact with the wear-resistant gasket, the other end of the shaft core is arranged on a fan blade, the fan blade is provided with a hub, a motor shell is arranged in the hub, and a permanent magnet ring is arranged in the motor shell; the silicon steel sheet comprises a yoke, teeth and a tooth crown. The technical scheme provided by the utility model can solve the problems in the prior art and generate better economic benefit.

Description

Heat radiation fan

Technical Field

The utility model belongs to the technical field of fans, and particularly relates to a cooling fan.

Background

Along with the development of the society, electrical equipment products are more and more, and electrical equipment can produce the heat in the work, and the performance of electrical equipment is guaranteed through direct current brushless fan heat dissipation cooling to most electrical equipment on the market, guarantees electrical equipment's safety and life-span.

The direct current brushless fans on the market are manufactured by using the traditional silicon steel sheets, and the direct current brushless fans of the type need to be started at higher voltage particularly at low rotating speed, and meanwhile, the efficiency is lower, so that the market requirements cannot be met. The dc brushless fan mounted on the electrical equipment usually needs to be provided with a mesh enclosure on its air inlet surface or air outlet surface to prevent human body or foreign objects from entering the dc brushless fan and affecting the normal operation of the dc brushless fan. The direct current brushless fan of this kind of structure is more loaded down with trivial details when the installation screen panel, leads to the efficiency of installation lower, has increased the cost invisibly.

In addition, the silicon steel sheet of the existing DC brushless fan has a defect, the structure of the outer edge of the tooth crown of the silicon steel sheet is formed by a section of the same involute arc, the DC brushless fan using the silicon steel sheet has larger cogging effect, the resistance when the DC brushless fan is started is increased, the DC brushless fan is unstable in operation when working at low voltage, and the application range of the DC brushless fan is reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the inventor has developed a heat dissipation fan according to his own experiments and groceries in the fan technical field for a long time.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a cooling fan, includes the fan frame, connect a plurality of rib on the fan frame inner wall, the other end of rib is connected in the fan frame chassis, a pipe of fan frame chassis center ascending arch, pipe externally mounted has the blade of silicon steel, be equipped with the insulating piece around the blade of silicon steel, be equipped with the PCB board below the insulating piece, the PCB board is connected with the conductor, the conductor winding forms the coil on the blade of silicon steel, the bottom of pipe is equipped with wear pad, be equipped with the snap ring above the wear pad, the higher authority of snap ring is equipped with the bearing, the inside rotatable axle core that is equipped with of bearing, axle core one end contacts in wear pad, the flabellum is connected to the axle core other end, the flabellum is equipped with wheel hub, be equipped with the motor casing in the wheel hub, be equipped with the permanent magnetism magnetic ring in the motor casing.

The silicon steel sheet is composed of a yoke, teeth and tooth crowns, the yoke of the silicon steel sheet is in a circular ring shape, a plurality of teeth are uniformly distributed on the outer circle of the yoke of the silicon steel sheet along the circumference, the other ends of the teeth are connected with the tooth crowns, the tooth crowns are not connected with each other, and a notch is formed;

a plurality of grooves are uniformly formed in the frame surface and used for mounting a mesh enclosure, the mesh enclosure is formed by connecting a plurality of concentric rings into a whole through two small round rods, and the tail ends of the small round rods are clamped in the grooves of the fan frame.

Furthermore, the outer edge of the tooth crown is provided with a plurality of involute arcs, the linear distances between points at two ends of any arc and the circle center of the yoke part are unequal, and the outer edge of any tooth crown is in a step shape.

Furthermore, any crown on the silicon steel sheet has the same shape, and any section of involute arc on any crown on the silicon steel sheet is the same.

Furthermore, any crown on the silicon steel sheet is different in shape, and any section of involute arc on any crown on the silicon steel sheet is different.

Furthermore, the number of involute arcs on any tooth crown of the silicon steel sheet is at least two.

Further, the connecting part of the mesh enclosure is arranged in the groove of the frame surface.

Further, the mesh enclosure is connected with the fan frame in a buckling mode.

The principle of the utility model is as follows: in the prior art, when a magnet in a rotor of a direct current brushless fan is aligned with the position of a stator tooth, a rotor magnetic pole is attracted with a stator to generate a cogging effect, so that the rotor of the direct current brushless fan is prevented from rotating, and the direct current brushless fan is difficult to start at low voltage.

In the technical scheme, when the direct current brushless fan is powered on, a current passes through a conductor wound on silicon steel sheet teeth, so that a magnetic field is generated in the space around the conductor, the magnetic field and a rotor magnetic ring generate repulsion to drive the rotor magnetic ring of the direct current brushless fan to do circular motion with the center of the silicon steel sheet, because the outer edge of each tooth crown of the silicon steel sheet is provided with a plurality of sections of involute arcs, the distance between the two ends of each involute arc and the rotor magnetic ring is unequal, two points which are far away and near are generated, the suction force of the point which is near the rotor magnetic ring is stronger, the suction force of the point which is far away from the rotor magnetic ring is weaker, and due to the strength of the magnet suction force, the rotor magnetic ring rotates from the points which are far away to the points which are near in sequence in a relay manner. Therefore, the cogging effect generated between the magnetic poles of the rotor and the stator is effectively weakened, and the direct current brushless fan can be started to work under lower voltage.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, the multi-section gradually-opened arc lines are arranged on the outer edge of the tooth crown on the silicon steel sheet, so that the silicon steel sheet with the structure can effectively weaken the cogging torque between the stator and the rotor of the direct-current brushless fan, the direct-current brushless fan can stably run, and the efficiency of the direct-current brushless fan is improved.

2. The tooth crown outer edge on the silicon steel sheet is provided with a plurality of sections of gradually opened arcs, so that the cogging torque between the stator and the rotor of the direct current brushless fan can be effectively weakened, the direct current brushless fan can be started under lower voltage, the wider voltage range representing that the direct current brushless fan can work is, the application range of the direct current brushless fan is improved, and the requirements of environmental protection and energy conservation in the market are met.

3. The utility model changes the connection mode of the mesh enclosure and the fan frame from the traditional screw connection to the buckle connection, improves the installation efficiency and saves the cost. Is favorable for further market promotion of the cooling fan.

Drawings

FIG. 1 is a top view of the present invention.

Fig. 2 is a bottom view of the present invention.

Fig. 3 is a schematic structural diagram of the present invention.

FIG. 4 is a schematic structural view of a silicon steel sheet.

Fig. 5 is a partially enlarged view a.

Fig. 6 is a partial enlarged view B.

Reference numerals: 100. the fan comprises a fan frame, 101, an inner wall, 102, ribs, 103, a fan frame chassis, 104, a pipe, 105, a groove, 106, a frame surface, 200, a silicon steel sheet, 201, a tooth crown, 202, a notch, 203, teeth, 204, a yoke, 300, an insulating sheet, 301, a PCB (printed Circuit Board), 302, a coil, 303, a wear-resistant gasket, 304, a snap ring, 305, a bearing, 306, a shaft core, 400, fan blades, 401, a hub, 500, a motor shell, 600, a permanent magnet ring, 700, a mesh cover, 701, a circular ring, 702, a small circular rod, 703 and a small circular rod end.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

As shown in fig. 1 to 5, a heat dissipation fan includes a fan frame 100, wherein a plurality of ribs 102 are connected to an inner wall 101 of the fan frame 100, the other ends of the ribs 102 are connected to a fan frame chassis 103, a tube 104 protrudes upwards from the center of the fan frame chassis 103, a silicon steel sheet 200 is installed outside the tube 104, an insulating sheet 300 is arranged around the silicon steel sheet 200, a PCB board 301 is arranged below the insulating sheet 300, the PCB board 301 is connected with a conductor, the conductor is wound on the silicon steel sheet 200 to form a coil 302, a wear-resistant gasket 303 is arranged at the bottom of the tube 104, a snap ring 304 is arranged above the wear-resistant gasket 303, a bearing 305 is arranged above the snap ring 304, a rotatable shaft core 306 is arranged inside the bearing 305, one end of the shaft core 306 is in contact with the wear-resistant gasket 303, the other end of the shaft core 306 is connected with a fan blade 400, the fan blade 400 is provided with a hub 401, a motor housing 500 is arranged in the hub 401, a permanent magnet ring 600 is arranged in the motor shell 500; the silicon steel sheet 200 is composed of a yoke 204, teeth 203 and a tooth crown 201, the yoke of the silicon steel sheet 200 is annular, a plurality of teeth 203 are uniformly distributed on the outer circle of the yoke 204 of the silicon steel sheet 200 along the circumference, the other ends of the teeth 203 are connected with the tooth crown 201, the tooth crowns 201 are not connected with each other, and a notch 202 is formed; the frame surface 106 is uniformly provided with a plurality of grooves 105, the grooves 105 are used for mounting the mesh enclosure 700, the mesh enclosure 700 is formed by connecting a plurality of concentric rings 701 into a whole through two small round rods 702, and the tail ends 703 of the small round rods are tightly clamped in the grooves 105 of the fan frame 100.

In this embodiment, the outer edge of the crown 201 has a plurality of involute arcs, the linear distance between the point at the two ends of any arc and the center of the yoke 204 is not equal, and the outer edge of any crown 201 is in a step shape.

In this embodiment, any crown 201 on the silicon steel sheet 200 has the same shape, and any section of the involute arc on any crown 201 on the silicon steel sheet 200 is the same.

In this embodiment, any one of the crowns 201 on the silicon steel sheet 200 has different shapes, and any one section of the involute arc on any one of the crowns 201 of the silicon steel sheet 200 is different.

In this embodiment, the number of the involute arcs on any crown 201 of the silicon steel sheet 200 is at least two.

In this embodiment, the connecting portion of the mesh cap 700 is mounted in the recess 105 of the frame surface 106.

In this embodiment, the mesh cover 700 is connected to the fan frame 100 by a snap-fit manner.

It should be noted that the above-mentioned embodiments are illustrative and not restrictive of the technical solutions of the present invention, and equivalents of those skilled in the art or other modifications made in the prior art are intended to be included within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a cooling fan, includes the fan frame, its characterized in that: the fan comprises a fan frame and is characterized in that a plurality of ribs are connected to the inner wall of the fan frame, the other ends of the ribs are connected to a fan frame chassis, a pipe protrudes upwards from the center of the fan frame chassis, a silicon steel sheet is mounted outside the pipe, an insulating sheet is arranged around the silicon steel sheet, a PCB is arranged below the insulating sheet and connected with a conductor, the conductor is wound on the silicon steel sheet to form a coil, a wear-resistant gasket is arranged at the bottom of the pipe, a clamping ring is arranged on the wear-resistant gasket, a bearing is arranged on the clamping ring, a rotatable shaft core is arranged inside the bearing, one end of the shaft core is in contact with the wear-resistant gasket, the other end of the shaft core is connected with a fan blade, the fan blade is provided with a hub, a motor shell is arranged in the hub, and a permanent magnet ring is arranged in the motor shell;

a plurality of grooves are uniformly formed in the frame surface of the fan frame and used for mounting a mesh enclosure, the mesh enclosure is formed by connecting a plurality of concentric rings into a whole through two small round rods, and the tail ends of the small round rods are clamped in the grooves of the fan frame.

2. The heat dissipating fan as claimed in claim 1, wherein: the outer edge of the tooth crown is provided with a plurality of involute arcs, the linear distances between points at two ends of any arc and the circle center of the yoke part are unequal, and the outer edge of any tooth crown is in a step shape.

3. The heat dissipating fan as claimed in claim 2, wherein: any crown on the silicon steel sheet is the same in shape, and any section of the involute arc line on any crown on the silicon steel sheet is the same.

4. The heat dissipating fan as claimed in claim 2, wherein: any crown on the silicon steel sheet is different in shape, and any section of the involute arc line on any crown on the silicon steel sheet is different.

5. The heat dissipating fan as claimed in claim 2, wherein: the number of the involute arcs on any tooth crown of the silicon steel sheet is at least two.

6. The heat dissipating fan as claimed in claim 1, wherein: the connecting part of the mesh enclosure is arranged in the groove of the frame surface.