A split type fan

Abstract

The present invention discloses a split-type fan, comprising a fixed bracket, a front end cover and a rear end cover for installing a motor, the fixed bracket comprising a first support plate, a front support plate and a rear support plate, the front end cover is arranged on the front support plate, the rear end cover is arranged on the rear support plate, the front support plate is arranged on the upper end of the first support plate, the rear support plate is arranged on the lower end of the first support plate, a first opening groove is arranged on the side surface of the first support plate near the center of the fixed bracket, the opening of the first opening groove faces the center of the fixed bracket, the motor can be installed in the fixed bracket from the first opening groove, the present invention provides a split-type fan which is simple to install and low in cost.

Description

Technical Field

[0001] The invention relates to the field of fans, and in particular to a split fan. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. The fan is mainly composed of a motor, fan blades, a casing and an air duct. The motor is fixed in a fixed bracket. According to the existing technology, the motor needs to be disassembled before it can be installed in the fixed bracket, which is troublesome to install and costly. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art and provide a split-type fan which is easy to install and low in cost.

[0004] The technical solution adopted by the present invention is: a split-type fan, including a fixed bracket, a front end cover and a rear end cover for installing a motor, the fixed bracket including a first support plate, a front support plate and a rear support plate, the front end cover is arranged on the front support plate, the rear end cover is arranged on the rear support plate, the front support plate is arranged on the upper end of the first support plate, the rear support plate is arranged on the lower end of the first support plate, the side surface of the first support plate near the center of the fixed bracket is provided with a first opening groove, the opening of the first opening groove faces the center of the fixed bracket, and the motor can be installed in the fixed bracket from the first opening groove.

[0005] After adopting the above structure, the present invention has the following advantages compared with the prior art: a fixed bracket is provided, the fixed bracket includes a first support plate, a front support plate and a rear support plate, the front end cover is arranged on the front support plate, and the rear end cover is arranged on the rear support plate, generally the first support plate, the front support plate and the rear support plate are integrated, the first support plate is provided with a first opening groove, which is equivalent to the side opening on the fixed bracket, the motor is put into the fixed bracket from the first opening groove, the motor is located on the front support plate and the rear support plate, and then the motor shaft passes through the rear end cover and the motor extends from the front end cover in sequence to connect the fan blades, and is directly installed from the side, without the need to disassemble the entire motor for installation, the installation is simple, and the cost is low. The prior art uses three claws to connect the front support plate and the rear support plate to maintain the concentricity of the front end cover and the rear end cover, but it is difficult to ensure the concentricity of the front end cover and the rear end cover, the requirements are high, the cost is high, and it is inconvenient to install the motor shaft, and the surface support is used instead of the three-claw support, the strength is high, the entire fixed bracket can be made of plastic, the concentricity of the front end cover and the rear end cover is good, the cost is low, and the reliability is high.

[0006] Preferably, it also includes a second support plate, a second opening groove is provided on the side of the second support plate near the center of the fixed bracket, the second support plate is located between the front support plate and the rear support plate, the second support plate is detachably connected to the first support plate, and the second opening groove forms a cavity for placing the motor with the first opening groove when the first support plate and the second support plate are connected, which is convenient for installation and disassembly.

[0007] Preferably, the left and right side surfaces of the first support plate are provided with a card slot along the axial direction of the first support plate, and the left and right side surfaces of the second support plate are provided with a protrusion along the axial direction of the second support plate, and the protrusion is engaged with the card slot, the upper surface of the front support plate is provided with at least one first fixing through hole, the upper surface of the second support plate is provided with a first fixing hole corresponding to the first fixing through hole, and the lower surface of the rear support plate is provided with at least one second fixing through hole, and the lower surface of the second support plate is provided with a second fixing hole corresponding to the second fixing through hole, the protrusion and the card slot are provided to facilitate the first support plate and the second support plate to be engaged with each other, the first fixing through hole and the first fixing hole are provided to facilitate fixing the upper end of the second support plate to the front support plate, and the second fixing through hole and the second fixing hole are provided to facilitate fixing the upper end of the second support plate to the rear support plate, the connection is reliable and the structure is simple.

[0008] Preferably, the outer surface of the first support plate and the outer surface of the second support plate are both provided with side air inlets connected to the cavity to increase the air intake.

[0009] Preferably, the first opening groove is provided with reinforcing ribs along the axial direction of the first support plate and the second opening groove is provided with reinforcing ribs along the axial direction of the second support plate to strengthen the strength of the first support plate and the second support plate.

[0010] Preferably, a front fixing plate is provided on the upper surface of the front support plate, a first through hole is provided on the front fixing plate for placing a bearing, a second through hole is provided on the front end cover for the motor shaft to pass through, an axis of the first through hole and an axis of the second through hole are in the same straight line, and the front end cover is fixed on the upper surface of the front support plate, with a simple structure. The front end cover and the front support plate are connected by bolts, which can not only limit the bearing on the motor shaft, but also ensure that the motor shaft can be extended, with high reliability.

[0011] Preferably, it also includes an air duct, and the upper surface of the front support plate is provided with at least three clamping protrusions along the outer circumferential direction of the front support plate, and the side of the clamping protrusion near the center of the front support plate contacts the side of the outer circumference of the front fixed plate, and the lower surface of the air duct is provided with a clamping groove clamped with the clamping protrusion, and the side of the clamping protrusion near the center of the front support plate contacts the side of the outer circumference of the front fixed plate, which can limit the front end cover to ensure that the front end cover is not cheap, has high installation accuracy and reliability, and the air duct is clamped with the front support plate and the connection is simple.

[0012] Preferably, a ventilation channel is provided in the air duct, and a connecting part and a plurality of wind guide plates are respectively provided at the upper end of the ventilation channel, the axis of the connecting part is in the same straight line with the axis of the ventilation channel, one end of the wind guide plate is connected to the outer circumference of the connecting part, and the other end of the wind guide plate is connected to the inner wall of the ventilation channel, and an air guide channel is formed between the wind guide plates, and a TPR soft rubber layer is coated on the inner wall of the ventilation channel, and the TPR soft rubber layer is located below the wind guide plate, and a plurality of air duct partitions for dividing the air guide channel are provided on the lower surface of the connecting part, and the air duct partitions form a circle, and air guide plates are provided to form air guide channels between the air guide plates, with fast heat dissipation and fast wind speed, and a TPR soft rubber layer is coated on the inner wall of the ventilation channel, and the TPR soft rubber layer can absorb the noise generated by wind collision, and has a good noise reduction effect, and the air duct partitions are provided to maximize the heat dissipation effect while the air volume is more concentrated and larger, and the air duct partitions are plugged into the lower surface of the connecting part for easy installation and disassembly.

[0013] Preferably, an annular sleeve for connecting the duct spacers is provided on the outer circumference of the duct spacers. When the duct spacers are fixed to the lower surface of the connecting part, the annular sleeve abuts against the lower surface of the TPR soft rubber layer, so as to facilitate fixing and limiting the duct spacers. The duct spacers will not vibrate under the action of wind, and have high reliability and low noise.

[0014] A third through hole is provided on the lower surface of the rear support plate, and a mounting protrusion protruding from the upper surface of the rear end cover is provided on the upper surface of the rear end cover, and the mounting protrusion can be stuck in the third through hole. A groove for placing a bearing is provided on the upper surface of the mounting protrusion, and a fourth through hole is provided on the lower surface of the rear end cover for the motor shaft to pass through, and the groove is connected to the fourth through hole, and the axis of the groove is in the same straight line with the axis of the fourth through hole. The rear end cover is fixed to the lower surface of the rear support plate, and is easy to install and disassemble, ensuring that the bearing of the motor shaft will not jump, and at the same time ensuring the concentricity of the motor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of a split-type fan fixing bracket of the present invention;

[0016] Figure 2 It is a three-dimensional diagram of a split fan fixing bracket of the present invention without the front cover and the rear cover;

[0017] Figure 3 It is a three-dimensional diagram of a split fan fixing bracket and a second supporting plate of the present invention;

[0018] Figure 4 It is a three-dimensional diagram of a second supporting plate of a split-type fan of the present invention at one angle;

[0019] Figure 5It is a three-dimensional diagram of the second supporting plate of a split-type fan of the present invention from another angle;

[0020] Figure 6 It is a three-dimensional diagram of a rear end cover of a split-type fan of the present invention;

[0021] Figure 7 It is a three-dimensional diagram of an air duct of a split-type fan of the present invention;

[0022] Figure 8 It is a three-dimensional diagram of the connection between the TPR soft rubber layer of a split-type fan and the air duct spacer of the present invention;

[0023] Fig. 9 It is a three-dimensional diagram of a split-type fan of the present invention.

[0024] Among them, 1. fixed bracket, 2. front end cover, 3. rear end cover, 4. first support plate, 5. first opening groove, 6. front support plate, 7. rear support plate, 8. second support plate, 9. second opening groove, 10. slot, 11. protrusion, 12. first fixed through hole, 13. second fixed through hole, 14. first fixed hole, 15. second fixed hole, 16. side air inlet, 17. reinforcing rib, 18. front fixed plate, 19. first through hole, 20. second through hole, 21. air duct, 22. snap-on protrusion, 23. snap-on groove, 24. ventilation channel, 25. air guide plate, 26. connecting part, 27. TPR soft rubber layer, 28. air duct spacer, 29. air guide channel, 30. annular sleeve, 31. third through hole, 32. mounting protrusion, 33. groove, 34. fourth through hole. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] As shown in the figure, the present invention provides a split fan, including a fixed bracket 1, a front end cover 2 and a rear end cover 3 for installing a motor, the fixed bracket 1 includes a first support plate 4, a front support plate 6 and a rear support plate 7, the front end cover 2 is arranged on the front support plate 6, the rear end cover 3 is arranged on the rear support plate 7, the front support plate 6 is arranged on the upper end of the first support plate 4, the rear support plate 7 is arranged on the lower end of the first support plate 4, the side of the first support plate 4 near the center of the fixed bracket 1 is provided with a first opening groove 5, the first opening groove 5 opens toward the center of the fixed bracket 1, and the motor can be installed in the fixed bracket 1 from the first opening groove 5. The advantage of the present invention is that a fixed bracket 1 is provided, the fixed bracket 1 includes a first support plate 4, a front support plate 6 and a rear support plate 7, the front end cover 2 is arranged on the front support plate 6, and the rear end cover 3 is arranged on the rear support plate 7, Generally, the first support plate 4, the front support plate 6 and the rear support plate 7 are integrated. The first support plate 4 is provided with a first opening groove 5, which is equivalent to the opening on the side of the fixed bracket 1. The motor is placed in the fixed bracket 1 from the first opening groove 5, and the motor is located between the front support plate 6 and the rear support plate 7. The motor shaft then passes through the rear end cover 3 and the motor extends from the front end cover 2 in sequence to connect the fan blades, and is installed directly from the side without the need to disassemble the entire motor for installation. The installation is simple and the cost is low. The prior art uses three claws to connect the front support plate 6 and the rear support plate 7 to maintain the concentricity of the front end cover 2 and the rear end cover 3, but it is difficult to ensure the concentricity of the front end cover 2 and the rear end cover 3, the requirements are high, the cost is high, and it is not convenient to install the motor shaft. Surface support is used instead of three-claw support, which has high strength. The entire fixed bracket 1 can be made of plastic, and the concentricity of the front end cover 2 and the rear end cover 3 is good, the cost is low, and the reliability is high.

[0027] It also includes a second support plate 8, and a second open groove 9 is provided on the side of the second support plate 8 near the center of the fixed bracket 1. The second support plate 8 is located between the front support plate 6 and the rear support plate 7. The second support plate 8 is detachably connected to the first support plate 4. When the first support plate 4 and the second support plate 8 are connected, the second open groove 9 forms a cavity for placing the motor with the first open groove 5. The cavity for placing the motor is convenient for installation and disassembly.

[0028] The left and right sides of the first support plate 4 are both provided with a card slot 10 along the axial direction of the first support plate 4, and the left and right sides of the second support plate 8 are both provided with a protrusion 11 along the axial direction of the second support plate 8, and the protrusion 11 is engaged with the card slot 10, the upper surface of the front support plate 6 is provided with at least one first fixing through hole 12, the upper surface of the second support plate 8 is provided with a first fixing hole 14 corresponding to the first fixing through hole 12, the lower surface of the rear support plate 7 is provided with at least one second fixing through hole 13, and the lower surface of the second support plate 8 is provided with a second fixing hole 15 corresponding to the second fixing through hole 13. The protrusion 11 and the card slot 10 are provided to facilitate the card connection between the first support plate 4 and the second support plate 8, and the first fixing through hole 12 and the first fixing hole 14 are provided to facilitate fixing the upper end of the second support plate 8 on the front support plate 6, and the second fixing through hole 13 and the second fixing hole 15 are provided to facilitate fixing the upper end of the second support plate 8 on the rear support plate 7, the connection is reliable, and the structure is simple.

[0029] The outer surfaces of the first support plate 4 and the second support plate 8 are both provided with side air inlets 16 communicating with the cavity to increase the air intake.

[0030] The first opening groove 5 along the axial direction of the first support plate 4 and the second opening groove 9 along the axial direction of the second support plate 8 are both provided with reinforcing ribs 17 to strengthen the strength of the first support plate 4 and the second support plate 8 .

[0031] A front fixing plate 18 is provided on the upper surface of the front support plate 6, and a first through hole 19 for placing a bearing is provided on the front fixing plate 18. A second through hole 20 for passing the motor shaft is provided on the front end cover 2. The axis of the first through hole 19 and the axis of the second through hole 20 are in the same straight line. The front end cover 2 is fixed on the upper surface of the front support plate 6 and has a simple structure. The front end cover 2 and the front support plate 6 are connected by bolts, which can not only limit the bearing on the motor shaft, but also ensure the concentricity of the motor shaft, and have high reliability.

[0032] It also includes an air duct 21, and the upper surface of the front support plate 6 is provided with at least three clamping protrusions 22 along the outer circumferential direction of the front support plate 6, and the side of the clamping protrusion 22 near the center of the front support plate 6 contacts the side of the outer circumference of the front fixed plate 18, and the lower surface of the air duct 21 is provided with a clamping groove 23 clamped with the clamping protrusion 22, and the side of the clamping protrusion 22 near the center of the front support plate 6 contacts the side of the outer circumference of the front fixed plate 18, which can limit the front end cover 2 to ensure that the front end cover 2 is not cheap, has high installation accuracy and high reliability, and the air duct 21 is clamped with the front support plate 6, and the connection is simple.

[0033] The air duct 21 is provided with a ventilation channel 24, and the upper end of the ventilation channel 24 is provided with a connecting portion 26 and a plurality of wind guide plates 25, the axis of the connecting portion 26 is in the same straight line as the axis of the ventilation channel 24, one end of the wind guide plate 25 is connected to the outer circumference of the connecting portion 26, and the other end of the wind guide plate 25 is connected to the inner wall of the ventilation channel 24, and an air guide channel 29 is formed between the wind guide plates 25, and the inner wall of the ventilation channel 24 is covered with a TPR soft rubber layer 27, and the TPR soft rubber layer 27 is located below the wind guide plate 25, and the lower surface of the connecting portion 26 is provided with a plurality of wind guide plates 25 for guiding the air guide channel The duct spacers 28 are divided by 29, and the duct spacers 28 are surrounded by a circle. Wind guide plates 25 are set, and wind guide channels 29 are formed between the wind guide plates 25. The heat dissipation is fast and the wind speed is fast. The inner wall of the ventilation channel 24 is covered with a TPR soft rubber layer 27. The TPR soft rubber layer 27 can absorb the noise generated by wind collision and has a good noise reduction effect. The duct spacers 28 are set to maximize the heat dissipation effect while the air volume is more concentrated and larger. The duct spacers 28 are plugged into the lower surface of the connecting part 26 for easy installation and disassembly. Noise reduction protrusions are set on the outer circumference of the TPR soft rubber layer 27, and noise reduction holes are set on the outer circumference of the air duct 21. The noise reduction protrusions are covered with rubber in the noise reduction holes.

[0034] An annular sleeve 30 for connecting the air duct spacer 28 is provided on the outer circumference of the air duct spacer 28. The annular sleeve 30 abuts against the lower surface of the TPR soft rubber layer 27 when the air duct spacer 28 is fixed on the lower surface of the connecting portion 26. The annular sleeve 30 is located at the lower end of the air duct spacer 28. The air duct spacer 28 is also located in the cylinder surrounded by the TPR soft rubber layer 27, which is convenient for fixing and limiting the air duct spacer 28. The air duct spacer 28 will not vibrate under the action of wind, and has high reliability and low noise.

[0035] A third through hole 31 is provided on the lower surface of the rear support plate 7, and a mounting protrusion 32 protruding from the upper surface of the rear end cover 3 is provided on the upper surface of the rear end cover 3. The mounting protrusion 32 can be stuck in the third through hole 31, and a groove 33 for placing a bearing is provided on the upper surface of the mounting protrusion 32. A fourth through hole 34 for the motor shaft to pass through is provided on the lower surface of the rear end cover 3, and the groove 33 is connected to the fourth through hole 34, and the axis of the groove 33 is in the same straight line as the axis of the fourth through hole 34. The rear end cover 3 is fixed to the lower surface of the rear support plate 7, and is easy to install and disassemble, ensuring that the bearing of the motor shaft will not jump, and at the same time ensuring the concentricity of the motor shaft.

[0036] Specifically, the principle of the present invention is to provide a fixed bracket 1, the fixed bracket 1 includes a first support plate 4, a front support plate 6 and a rear support plate 7, the front end cover 2 is arranged on the front support plate 6, and the rear end cover 3 is arranged on the rear support plate 7. Generally, the first support plate 4, the front support plate 6 and the rear support plate 7 are integrated, and the first support plate 4 is provided with a first opening groove 5, which is equivalent to the side opening on the fixed bracket 1. The motor is placed in the fixed bracket 1 through the first opening groove 5, and the motor is located on the front support plate 6 and the rear support plate 7. Then the motor shaft passes through the rear end cover 3 and the motor extends from the front end cover 2 in sequence to connect the fan blades, and is installed directly from the side without having to disassemble the entire motor for installation. The installation is simple and the cost is low. The prior art uses three claws to connect the front support plate 6 and the rear support plate 7 to hold the front end cover 2 and the rear end cover 3. The concentricity of the front cover 2 and the rear cover 3 is good, but it is difficult to ensure the concentricity of the front cover 2 and the rear cover 3, the requirements are high, the cost is high, and it is not convenient to install the motor shaft. The surface support is used instead of the three-claw support, which has high strength. The entire fixed bracket 1 can be made of plastic, and the front cover 2 and the rear cover 3 have good concentricity, low cost, and high reliability. The projection of the first support plate 4 on the horizontal plane is a first arc, and the projection of the second support plate 8 on the horizontal plane is a second arc. After the first support plate 4 and the second support plate 8 are connected, the projection on the horizontal plane forms a complete circle. The first arc and the second arc are concentric, and the center angle of the second arc is greater than or equal to 180°. The center angle of the second arc is preferably 180°. The motor generally uses a micromotor. The fixed bracket 1 and the motor form a motor structure, and the motor structure plus the air duct 21 becomes a fan.

[0037] Installation steps: 1. Place the motor into the fixing bracket 1 from the first opening slot 5, at which time the motor is located between the front support plate 6 and the rear support plate 7 brackets; 2. Pass the motor shaft through the third through hole 31, the motor and the first through hole 19 in sequence and extend out of the fixing bracket 1; 3. Set bearings at both ends of the motor shaft so that the bearing located at the front end of the motor shaft is placed in the first through hole 19 of the front fixing plate 18; 4. Clamp the mounting protrusion 32 of the rear end cover 3 into the third through hole 31 while allowing the bearing at the rear end of the motor shaft to be located in the groove 33, and the rear end of the motor shaft extends out through the fourth through hole 43; 5. Tighten the bolts to fix the rear end cover 3 to the rear support portion 7, and fix the front end cover 2 on the front support plate 6 so that the front end of the motor shaft passes through the second through hole 20; 5. Clamp the second support plate 8 to the first support plate 4, and the bolts are fixed through the first fixing through hole 12 to the first fixing hole 14, so that the upper end of the second support plate 8 is fixed to the lower surface of the front support plate 6, and the bolts are fixed through the second fixing through hole 13 to the second fixing hole 15, so that the lower end of the second support plate 8 is fixed to the upper surface of the rear support plate 7.

[0038] The above is an explanation of the preferred embodiments of the present invention, but it cannot be understood as a limitation of the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the scope of protection of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A split type fan, comprising a fixing bracket (1) for mounting a motor, a front cover (2) and a rear cover (3), characterized in that: The fixed bracket (1) comprises a first support plate (4), a front support plate (6) and a rear support plate (7), the front end cover (2) is arranged on the front support plate (6), the rear end cover (3) is arranged on the rear support plate (7), the front support plate (6) is arranged at the upper end of the first support plate (4), the rear support plate (7) is arranged at the lower end of the first support plate (4), the side surface of the first support plate (4) near the center of the fixed bracket (1) is provided with a first opening groove (5), the opening of the first opening groove (5) faces the center of the fixed bracket (1), and the motor can be installed in the fixed bracket (1) from the first opening groove (5); it also comprises a second support plate (8), the side surface of the second support plate (8) near the center of the fixed bracket (1) is provided with a second opening groove (9), the second support plate (8) is located between the front support plate (6) and the rear support plate (7), the second support plate (8) is detachably connected to the first support plate (4), and the second opening groove (9) is detachably connected to the first support plate (4). ) When the first support plate (4) and the second support plate (8) are connected, a cavity for placing the motor is formed with the first opening groove (5); the left and right side surfaces of the first support plate (4) are provided with a clamping groove (10) along the axial direction of the first support plate (4), and the left and right side surfaces of the second support plate (8) are provided with a protrusion (11) along the axial direction of the second support plate (8), and the protrusion (11) is clamped with the clamping groove (10); the upper surface of the front support plate (6) is provided with at least one first fixing through hole (12), and the upper surface of the second support plate (8) is provided with a first fixing hole (14) corresponding to the first fixing through hole (12); the lower surface of the rear support plate (7) is provided with at least one second fixing through hole (13), and the lower surface of the second support plate (8) is provided with a second fixing hole (15) corresponding to the second fixing through hole (13); the outer surface of the first support plate (4) and the outer surface of the second support plate (8) are both provided with a side air inlet (16) connected to the cavity.

2. A split type fan according to claim 1, characterized in that: The first opening groove (5) is provided with reinforcing ribs (17) along the axial direction of the first support plate (4) and the second opening groove (9) is provided with reinforcing ribs (17) along the axial direction of the second support plate (8).

3. A split type fan according to claim 1, characterized in that: The upper surface of the front support plate (6) is provided with a front fixing plate (18), the front fixing plate (18) is provided with a first through hole (19) for placing a bearing, the front end cover (2) is provided with a second through hole (20) for the motor shaft to pass through, the axis of the first through hole (19) and the axis of the second through hole (20) are in the same straight line, and the front end cover (2) is fixed on the upper surface of the front support plate (6).

4. A split type fan according to claim 3, characterized in that: It also includes an air duct (21), the upper surface of the front support plate (6) is provided with at least three clamping protrusions (22) along the outer circumference of the front support plate (6), the side surface of the clamping protrusion (22) near the center of the front support plate (6) contacts the side surface of the outer circumference of the front fixing plate (18), and the lower surface of the air duct (21) is provided with a clamping groove (23) clamped with the clamping protrusion (22).

5. A split type fan according to claim 4, characterized in that: The air duct (21) is provided with a ventilation channel (24), and the upper end of the ventilation channel (24) is provided with a connecting portion (26) and a plurality of air guide plates (25), the axis of the connecting portion (26) and the axis of the ventilation channel (24) are in the same straight line, one end of the air guide plate (25) is connected to the outer circumference of the connecting portion (26), and the other end of the air guide plate (25) is connected to the inner wall of the ventilation channel (24), and an air guide channel (29) is formed between the air guide plates (25), the inner wall of the ventilation channel (24) is coated with a TPR soft rubber layer (27), and the TPR soft rubber layer (27) is located below the air guide plate (25), and the lower surface of the connecting portion (26) is provided with a plurality of air duct partitions (28) for dividing the air guide channel (29), and the air duct partitions (28) are arranged in a circle.

6. A split type fan according to claim 5, characterized in that: An annular sleeve (30) for connecting the air duct spacers (28) is provided on the outer circumference of the air duct spacers (28), and the annular sleeve (30) abuts against the lower surface of the TPR soft rubber layer (27) when the air duct spacers (28) are fixed to the lower surface of the connecting portion (26).

7. A split type fan according to claim 1, characterized in that: The lower surface of the rear support plate (7) is provided with a third through hole (31), the upper surface of the rear end cover (3) is provided with a mounting protrusion (32) protruding from the upper surface of the rear end cover (3), the mounting protrusion (32) can be stuck in the third through hole (31), the upper surface of the mounting protrusion (32) is provided with a groove (33) for placing a bearing, the lower surface of the rear end cover (3) is provided with a fourth through hole (34) for the motor shaft to pass through, the groove (33) is connected to the fourth through hole (34), the axis of the groove (33) and the axis of the fourth through hole (34) are on the same straight line, and the rear end cover (3) is fixed to the lower surface of the rear support plate (7).

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