Anti-blocking centrifugal fan

Abstract

The present invention relates to the technical field of centrifugal fans, and specifically to an anti-blocking centrifugal fan, comprising a centrifugal fan body, wherein an air inlet is opened on the centrifugal fan body, and supporting round rods are symmetrically fixedly arranged on the centrifugal fan body on both sides of the air inlet, and an air inlet channel is fixedly installed at the air inlet, and a vertical air inlet cylinder is fixedly arranged on one end of the air inlet channel close to the centrifugal fan body, and the vertical air inlet cylinder is connected with the air inlet channel, and the air inlet channel is fixedly installed at the air inlet of the centrifugal fan body, and a cleaning brush is arranged at the tube mouth of the air inlet channel, and a first matching plug plate and a second matching plug plate that can move with the cleaning brush are provided to cooperate with the movement of the cleaning brush. The movement of the two can blow and suck sticky blocking dirt while the cleaning brush rotates to clean the dirt, so as to avoid the blocking dirt from adhering to the cleaning brush and being difficult to remove due to rotation.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal fans, in particular to an anti-blocking centrifugal fan. Background Art

[0002] Centrifugal fans can be used for indoor ventilation in general factories and large buildings. They can be used to input gas as well as output gas. They rely on input mechanical energy to increase gas pressure and discharge gas. They are a driven fluid machine.

[0003] The existing centrifugal fan has an air inlet channel, and the motor drives the fan blades to rotate to reduce the air pressure inside the casing. Then the outside air is pressed into the air inlet channel and the pressed air is discharged in a concentrated manner through the rotation of the fan blades, thereby playing the role of ventilation and exhaust. When in use, its life is greatly affected by the environment. For example, when the ventilation of some chemical plants or large factories is carried out, the air contains a high content of dust, powder, sticky substances, etc., and a centrifugal fan is used. The air inlet channel of the centrifugal fan will often accumulate a lot of sticky dust and other impurities due to long-term work, which will block the air inlet channel, and the air intake volume will become smaller. Even if you don't pay attention, the air inlet channel will be completely blocked. When starting the centrifugal fan, the fan motor will be burned out, posing a safety hazard. Summary of the invention

[0004] The object of the present invention is to provide an anti-blocking centrifugal fan to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A blockage-proof centrifugal fan comprises a centrifugal fan body, the centrifugal fan body is provided with an air inlet, supporting round rods are symmetrically fixedly arranged on the centrifugal fan body on both sides of the air inlet, and an air inlet channel is fixedly installed at the air inlet, a vertical air inlet cylinder is fixedly arranged on one end of the air inlet channel close to the centrifugal fan body, the vertical air inlet cylinder is connected with the air inlet channel, and a mounting support frame is fixedly arranged on the upper end of the vertical air inlet cylinder, a guide through hole is provided on the mounting support frame, fixed top blocks are symmetrically fixedly arranged on the mounting support frames at both ends of the guide through hole, fixed top plates are symmetrically fixedly arranged on both sides of the lower end of the fixed top block, auxiliary sliding rods are symmetrically fixedly arranged on both sides of the outer side of the vertical air inlet cylinder, auxiliary air cylinders are symmetrically fixedly arranged on the vertical air inlet cylinder on the lower side of the auxiliary sliding rods, the auxiliary air cylinders are connected with the vertical air inlet cylinder, and the vertical air inlet cylinder The vents are symmetrically fixed to the two ends of the interior with support fixing plates, and an inclined fixing plate is fixedly provided on the support fixing plate, a mounting block is fixedly provided on the upper side of one end of the air inlet channel away from the centrifugal fan body, a mounting hole is provided on the mounting block, and the mounting hole is connected to the air inlet channel, and a horizontal support plate is fixedly provided at the port of the air inlet channel away from one end of the centrifugal fan body, and a support guide plate is fixedly provided on the horizontal support plate, and limiting guide rods are symmetrically fixedly provided on both sides of the support guide plate, and support side blocks are symmetrically fixedly provided on both sides of one end of the air inlet channel away from the centrifugal fan body, a support matching hole is provided on the support side blocks, a support round rod is inserted in the support matching hole, and an arch frame is fixedly provided on the upper end of the support side block, a bearing plate is fixedly provided at the middle position of the upper end of the arch frame, and a high-efficiency cleaning mechanism is installed on the air inlet channel.

[0007] Preferably, the efficient cleaning mechanism includes a motor, a free drive plate, a long connecting plate, a movable connecting plate, a through-hole blocking plate, a first connecting spring, a fixed locking plate and a second connecting spring. The motor is fixedly mounted on a supporting plate, and a rotating shaft is mounted on the motor. The rotating shaft passes through the supporting plate and is inserted into the mounting hole.

[0008] Preferably, two half-circle gears are fixedly provided on the rotating shaft, the half-circle gears are located on the outside of the air inlet channel, and a bearing is sleeved on the rotating shaft, the bearing is installed in the mounting hole, and a cleaning brush is fixedly provided on the lower end circumference of the rotating shaft, and the cleaning brush is located in the air inlet channel.

[0009] Preferably, guide sliding holes are symmetrically provided on both sides of the free drive plate, and limiting guide rods are inserted in the guide sliding holes, and a first rack is fixedly provided on one end of the free drive plate, and a second rack is fixedly provided on the upper end of the other side of the free drive plate, and support connecting plates are welded on the ends of the first rack and the second rack away from the free drive plate, and first hinge frames are symmetrically fixedly provided on both sides of the lower end of the support connecting plate, and a first matching hinge rod is hinged on the first hinge frame, and a long connecting plate is hinged on the other end of the first matching hinge rod.

[0010] Preferably, a second hinged frame is fixedly provided on one end of the long connecting plate close to the arch frame, the second hinged frame is hinged to the first matching hinge rod, and a mounting round rod is fixedly provided on one end of the long connecting plate away from the arch frame, a first matching plug plate is fixedly provided on the mounting round rod, and the first matching plug plate is inserted in the auxiliary air duct.

[0011] Preferably, a connecting vertical plate is fixedly provided on the upper side of one end of the long connecting plate away from the arch frame, a horizontal supporting plate is fixedly provided on the connecting vertical plate, a vertical sleeve plate is fixedly provided on the side of the horizontal supporting plate away from the connecting vertical plate, a matching guide hole is opened on the vertical sleeve plate, an auxiliary sliding rod is inserted in the matching guide hole, and a second matching hinge rod is hinged at the upper end of the vertical sleeve plate.

[0012] Preferably, the upper end of the second mating hinge rod is hinged with a movable connecting plate, a supporting connecting rod is fixedly provided at the middle position of the lower end of the movable connecting plate, fixed pressure strips are symmetrically fixed at both ends of the supporting connecting rod, a fixed pressure block is fixed on the fixed pressure strip, and a mating bottom block is fixedly provided at the lower end of the supporting connecting rod.

[0013] Preferably, support rods are symmetrically fixed at both ends of the mating bottom block, and a second mating plug plate is fixed at the lower end of the mating bottom block, air inlet holes are symmetrically opened at both ends of the second mating plug plate, and two through-hole sealing plates are symmetrically installed on the second mating plug plate, and the second mating plug plate is inserted in the vertical air inlet tube.

[0014] Preferably, the through hole blocking plate is located at the lower side of the second matching plug plate, and a connecting support plate is fixedly provided on the upper end surface of the through hole blocking plate away from one end of the supporting connecting rod, a matching socket is provided on the connecting support plate, a supporting support rod is inserted in the matching socket, and an arc-shaped rod matching hole is provided on the connecting support plate on the upper side of the matching socket, a first connecting spring is sleeved on the supporting support rod, and a lower convex plate is fixedly provided on one end of the supporting connecting rod on the lower side of the through hole blocking plate, and a cylindrical driving rod is fixedly provided on the lower end of the lower convex plate.

[0015] Preferably, a fixed locking plate is hinged at the upper end of the connecting support plate, and a sloped protrusion is fixedly provided on the upper end surface of the fixed locking plate close to one end of the supporting connecting rod, and an arc-shaped bent rod is fixedly provided on the lower end surface of the fixed locking plate, the arc-shaped bent rod is inserted into the arc-shaped rod matching hole, and a second connecting spring is sleeved on the arc-shaped bent rod.

[0016] Compared with the prior art, the invention has the following advantages:

[0017] 1. A cleaning brush structure is provided in the air inlet passage to agitate the air so as to avoid excessive sticky impurities accumulating in the air inlet passage after long-term use, thereby preventing the problem of blockage.

[0018] 2. In coordination with the movement of the cleaning brush, a first cooperating plug plate and a second cooperating plug plate are provided which can move together with the cleaning brush. The movement of the two can blow and suck the sticky clogging dirt while the cleaning brush rotates to clean the dirt, thereby preventing the clogging dirt from adhering to the cleaning brush and being difficult to remove even by rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a centrifugal fan assembly from the first perspective.

[0020] Figure 2 A second perspective diagram of the centrifugal fan assembly.

[0021] Figure 3 It is a structural schematic diagram of the centrifugal fan body.

[0022] Figure 4 This is a schematic diagram of the structure of the air inlet channel from the first perspective.

[0023] Figure 5 This is a schematic diagram of the structure of the air inlet channel from a second perspective.

[0024] Figure 6 for Figure 4 A magnified schematic diagram of center A.

[0025] Figure 7 This is a schematic diagram of the assembly of the motor and the free drive board.

[0026] Figure 8 It is a schematic diagram of the structure of the long connecting plate.

[0027] Fig. 9 This is a first-person perspective diagram of the mobile connecting plate assembly.

[0028] Fig.10 This is a second-view schematic diagram of the mobile connecting plate assembly.

[0029] Fig.11 for Fig. 9 A magnified schematic diagram of point B in the middle.

[0030] In the figure: 1, centrifugal fan body; 11, air inlet; 12, supporting round rod; 2, air inlet channel; 21, vertical air inlet tube; 22, mounting frame; 23, guide through hole; 24, fixed top block; 25, fixed top plate; 26, auxiliary sliding rod; 27, auxiliary air tube; 28, support fixing plate; 281, inclined fixing plate; 29, mounting block; 291, mounting hole; 201, horizontal bearing plate; 202, supporting guide plate; 203, limiting guide rod; 204, supporting side block; 205, supporting matching hole; 206, arch frame; 207, bearing plate; 3, motor; 31, rotating shaft; 32, half-circle gear; 33, bearing; 34, cleaning brush; 4, free drive plate; 41, guide sliding hole; 42, first rack; 43, second rack; 45, support Supporting plate; 46, first hinge frame; 47, first matching hinge rod; 5, long connecting plate; 51, second hinge frame; 52, mounting round rod; 53, first matching plug plate; 54, connecting vertical plate; 55, horizontal supporting plate; 56, vertical sleeve plate; 57, matching guide hole; 58, second matching hinge rod; 6, movable connecting plate; 61, supporting connecting rod; 62, fixed pressure strip; 63, fixed pressure block; 64, matching bottom block; 65, supporting support rod; 66, second matching plug plate; 67, air inlet hole; 7, through hole blocking plate; 71, connecting supporting plate; 72, matching jack; 73, arc rod matching hole; 74, first connecting spring; 75, lower convex plate; 76, cylindrical driving rod; 8, fixed locking plate; 81, inclined convex block; 82, arc-shaped bending rod; 83, second connecting spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 11 , the present invention provides a technical solution:

[0033] A centrifugal fan with anti-blocking function, comprising a centrifugal fan body 1, an air inlet 11 is provided on the centrifugal fan body 1, supporting round rods 12 are symmetrically fixedly arranged on the centrifugal fan body 1 on both sides of the air inlet 11, and an air inlet channel 2 is fixedly installed at the air inlet 11, a vertical air inlet cylinder 21 is fixedly arranged on one end of the air inlet channel 2 close to the centrifugal fan body 1, the vertical air inlet cylinder 21 is connected with the air inlet channel 2, and a mounting bracket 22 is fixedly arranged on the upper end of the vertical air inlet cylinder 21, and the mounting bracket A guide through hole 23 is provided on the mounting frame 22, and fixed top blocks 24 are symmetrically fixedly arranged on the mounting frame 22 at both ends of the guide through hole 23. Fixed top plates 25 are symmetrically fixedly arranged on both sides of the lower end of the fixed top block 24. Auxiliary sliding rods 26 are symmetrically fixedly arranged on both sides of the outer side of the vertical air inlet cylinder 21. Auxiliary air cylinders 27 are symmetrically fixedly arranged on the vertical air inlet cylinder 21 below the auxiliary sliding rods 26. The auxiliary air cylinders 27 are connected to the vertical air inlet cylinder 21. The inner ends of the vertical air inlet cylinder 21 are symmetrically fixed. A support fixing plate 28 is fixedly provided, and an inclined fixing plate 281 is fixedly provided on the support fixing plate 28. A mounting block 29 is fixedly provided on the upper side of one end of the air inlet channel 2 away from the centrifugal fan body 1. A mounting hole 291 is opened on the mounting block 29. The mounting hole 291 is connected to the air inlet channel 2. A horizontal support plate 201 is fixedly provided at the port of the air inlet channel 2 away from the centrifugal fan body 1. A support guide plate 202 is fixedly provided on the horizontal support plate 201. The support guide plate 202 is fixedly provided on the horizontal support plate 201. Limiting guide rods 203 are symmetrically fixed on both sides of 02, and supporting side blocks 204 are symmetrically fixed on both sides of one end of the air inlet channel 2 away from the centrifugal fan body 1, and supporting side blocks 204 are provided with supporting matching holes 205, and supporting round rods 12 are inserted into the supporting matching holes 205, and an arch frame 206 is fixedly provided on the upper end of the supporting side block 204, and a bearing plate 207 is fixedly provided at the middle position of the upper end of the arch frame 206, and a high-efficiency cleaning mechanism is installed on the air inlet channel 2.

[0034] The efficient cleaning mechanism includes a motor 3, a free drive plate 4, a long connecting plate 5, a movable connecting plate 6, a through-hole blocking plate 7, a first connecting spring 74, a fixed locking plate 8 and a second connecting spring 83. The motor 3 is fixedly mounted on the supporting plate 207, and a rotating shaft 31 is installed on the motor 3. The rotating shaft 31 passes through the supporting plate 207 and is inserted into the mounting hole 291. In addition, two half-circle gears 32 are fixedly arranged on the rotating shaft 31. The teeth on the two half-circle gears 32 are in the same direction, and when the centrifugal fan body 1 is not working, it faces the vertical air inlet cylinder 21, and the half-circle gears 32 are on the outside of the air inlet channel 2, and a bearing 33 is sleeved on the rotating shaft 31, and the bearing 33 is installed in the mounting hole 291. A cleaning brush 34 is fixedly arranged on the circumference of the lower end of the rotating shaft 31, and the cleaning brush 34 is in the air inlet channel 2. In addition, the motor 3 is a motor under the prior art.

[0035] Guide slide holes 41 are symmetrically provided on both sides of the free drive plate 4, and a limiting guide rod 203 is inserted in the guide slide hole 41, and a first rack 42 is fixedly provided on one side end of the free drive plate 4, and a second rack 43 is fixedly provided on the upper end of the other side of the free drive plate 4, and a supporting connecting plate 45 is welded on the end of the first rack 42 and the second rack 43 away from the free drive plate 4, and a first hinge frame 46 is symmetrically fixedly provided on both sides of the lower end of the supporting connecting plate 45, and a first matching hinge rod 47 is hinged on the first hinge frame 46, and a long connecting plate 5 is hinged on the other end of the first matching hinge rod 47, and when the rotating shaft 31 rotates, the upper half circle gear 32 is meshed with the second rack 43, and the lower half circle gear 32 is meshed with the first rack 42.

[0036] A second hinged frame 51 is fixedly provided on one end of the long connecting plate 5 close to the arch frame 206, and the second hinged frame 51 is hinged to the first matching hinge rod 47, and a mounting round rod 52 is fixedly provided on one end of the long connecting plate 5 away from the arch frame 206, and a first matching plug plate 53 is fixedly provided on the mounting round rod 52, and the first matching plug plate 53 is inserted into the auxiliary air duct 27, and the side surface of the first matching plug plate 53 contacts the inner wall of the auxiliary air duct 27, and the distance from the second hinged frame 51 to the arch frame 206 is less than the distance from the first hinged frame 46 to the arch frame 206. In addition, when the centrifugal fan body 1 is not working, the first matching plug plate 53 is on one side of the inner tube mouth of the auxiliary air duct 27.

[0037] A connecting vertical plate 54 is fixedly provided on the upper side of one end of the long connecting plate 5 away from the arch frame 206, a horizontal supporting plate 55 is fixedly provided on the connecting vertical plate 54, a vertical sleeve plate 56 is fixedly provided on the side of the horizontal supporting plate 55 away from the connecting vertical plate 54, a matching guide hole 57 is opened on the vertical sleeve plate 56, an auxiliary sliding rod 26 is inserted in the matching guide hole 57, and a second matching hinge rod 58 is hinged at the upper end of the vertical sleeve plate 56.

[0038] The upper end of the second matching hinge 58 is hinged with a movable connecting plate 6, and the distance from the end of the second matching hinge 58 hinged with the vertical sleeve plate 56 to the vertical air inlet 21 is smaller than the distance from the end of the second matching hinge 58 hinged with the movable connecting plate 6 to the vertical air inlet 21. A supporting connecting rod 61 is fixedly provided at the middle position of the lower end of the movable connecting plate 6, and fixed pressure strips 62 are symmetrically fixedly provided at both ends of the supporting connecting rod 61, and a fixed pressure block 63 is fixedly provided on the fixed pressure strip 62. A matching bottom block 64 is fixedly provided at the lower end of the supporting connecting rod 61. In addition, the matching bottom block 64 Support rods 65 are symmetrically fixed at both ends, and a second matching plug plate 66 is fixed at the lower end of the matching bottom block 64, air inlet holes 67 are symmetrically opened at both ends of the second matching plug plate 66, and two through-hole blocking plates 7 are symmetrically installed on the second matching plug plate 66, and the second matching plug plate 66 is inserted into the vertical air inlet tube 21, and the side surface of the second matching plug plate 66 is in contact with the inner wall of the vertical air inlet tube 21, and when the first matching plug plate 53 is at the inner port of the auxiliary air tube 27, the air inlet hole 67 is in an open state at this time.

[0039] The through hole blocking plate 7 is located at the lower side of the second matching plug plate 66, and a connecting support plate 71 is fixedly provided at one end of the upper end surface of the through hole blocking plate 7 away from the supporting connecting rod 61, and the upper end surface of the through hole blocking plate 7 is in contact with the lower end surface of the second matching plug plate 66, a matching socket 72 is provided on the connecting support plate 71, a supporting support rod 65 is inserted in the matching socket 72, and an arc-shaped rod matching hole 73 is provided on the connecting support plate 71 on the upper side of the matching socket 72, a first connecting spring 74 is sleeved on the supporting support rod 65, a lower convex plate 75 is fixedly provided at one end of the lower side of the through hole blocking plate 7 close to the supporting connecting rod 61, a cylindrical driving rod 76 is fixedly provided at the lower end of the lower convex plate 75, and two ends of the first connecting spring 74 are respectively welded to the matching bottom block 64 and the connecting support plate 71.

[0040] A fixed lock plate 8 is hinged on the upper end of the connecting support plate 71, and a bevel protrusion 81 is fixedly provided on the upper end surface of the fixed lock plate 8 close to one end of the supporting connecting rod 61, and an arc-shaped bent rod 82 is fixedly provided on the lower end surface of the fixed lock plate 8. The arc-shaped bent rod 82 is inserted into the arc-shaped rod matching hole 73. The shape of the arc-shaped bent rod 82 matches the internal shape of the arc-shaped rod matching hole 73, and a second connecting spring 83 is sleeved on the arc-shaped bent rod 82. The two ends of the second connecting spring 83 are respectively welded to the fixed lock plate 8 and the connecting support plate 71. When the first matching plug plate 53 is at the inner port of the auxiliary air duct 27, the bevel protrusion 81 is stuck on the inner side of the fixed pressure block 63, and the first connecting spring 74 is in a compressed state.

[0041] When the centrifugal fan body 1 is working, the starting motor 3 drives the rotating shaft 31 to rotate. As the rotating shaft 31 rotates, the air inlet channel 2 starts to be cleaned under the action of the cleaning brush 34. As the rotating shaft 31 rotates, the lower half-circle gear 32 is first driven to mesh with the first rack 42, and the free drive plate 4 is driven to move toward the support guide plate 202. When it moves to the farthest distance, the lower half-circle gear 32 is separated from the first rack 42, and then the upper half-circle gear 32 is meshed with the second rack 43, thereby driving the free drive plate 4 to move in the opposite direction, and then driving the free drive plate 4 to reciprocate. When the free drive plate 4 moves toward the support guide plate 202, the first mating hinge 47 is used to push the free drive plate 4 to move in the opposite direction. The movable long connecting plate 5 moves in the direction away from the vertical air inlet cylinder 21, and then drives the movable connecting plate 6 to move upward under the action of the second matching hinge 58. Since the air inlet hole 67 is in an open state at this time, when the first matching plug plate 53 moves toward the outer port of the auxiliary air cylinder 27, it can have a certain adsorption effect on the air in the vertical air inlet cylinder 21, and can blow and suck the swept impurities, so that the blockage in the air inlet channel can fall off as soon as possible during stirring. During actual cleaning, the centrifugal fan itself is stopped and will not work. It cannot rely on the suction force of the centrifugal fan itself. When the first matching plug plate 53 moves to the outer port of the auxiliary air cylinder 27, the fixed lock plate 8 will be squeezed by the fixed top plate 25, so that the fixed lock plate 8 will rotate downward. , which will cause the inclined protrusion 81 to move to the lower side of the fixed pressure block 63. At this time, the through-hole blocking plate 7 is in an unlocked state. Under the action of the first connecting spring 74, the through-hole blocking plate 7 moves to block the air inlet through hole 67, and then the free driving plate 4 moves toward the direction of the vertical air inlet cylinder 21, and then under the action of the first matching hinge 47, the first matching plug plate 53 is driven to move toward the inner cylinder mouth of the auxiliary air cylinder 27. At the same time, under the action of the second matching hinge 58, the movable connecting plate 6 is driven to move downward. At this time, the air inlet through hole 67 is in a closed state, so under the action of the second matching plug plate 66, the air in the vertical air inlet cylinder 21 can be accelerated and pushed into the air inlet channel 2. At the same time, the first matching plug plate 53 blocks the auxiliary air cylinder 27. The air in the air is accelerated to be pushed into the air inlet channel 2, speeding up the unblocking of the air inlet channel 2. In addition, when the second matching plug plate 66 moves downward to the lowest end, the cylindrical driving rod 76 will contact the inclined fixing plate 281, so that under the action of the inclined fixing plate 281, the through-hole blocking plate 7 will be pushed to move in the direction of the supporting connecting rod 61, thereby opening the air inlet through-hole 67. At the same time, when the fixed locking plate 8 moves, the inclined protrusion 81 will conflict with the fixed pressing block 63, and then under the action of the fixed pressing block 63, the fixed locking plate 8 will be pushed to rotate downward until the inclined protrusion 81 passes over the fixed pressing block 63, and then under the action of the second connecting spring 83, the fixed locking plate 8 is reset, and the inclined protrusion 81 is stuck on the inner side of the fixed pressing block 63, so as to fix the through-hole blocking plate 7.Then the air inlet hole 67 is in a stable open state, which is convenient for the second matching plug plate 66 to move downward and upward, that is, the setting of the efficient cleaning mechanism on the air inlet channel 2, to a large extent, ensures that when the cleaning plate is working, there is an auxiliary structure to absorb the blockages cleaned by the cleaning plate, so that the work of clearing the blockage can be carried out smoothly. Simple rotation cleaning cannot dredge the air inlet channel well, because the centrifugal fan is suspended when clearing the blockage, and the air inlet channel is often connected to the pipeline, which is not convenient for disassembly and cleaning. Generally, a large amount of cleaning will be carried out only when it is regularly maintained for a long time. Therefore, the technology of this application has a strong application prospect.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-blocking centrifugal fan, comprising a centrifugal fan body (1), wherein the centrifugal fan body (1) is provided with an air inlet (11), characterized in that: Support round rods (12) are symmetrically fixed to the centrifugal fan body (1) on both sides of the air inlet (11), and an air inlet channel (2) is fixedly installed at the air inlet (11), a vertical air inlet cylinder (21) is arranged on the air inlet channel (2), the vertical air inlet cylinder (21) is connected with the air inlet channel (2), and a mounting frame (22) is fixedly arranged on the upper end of the vertical air inlet cylinder (21), a guide through hole (23) is opened on the mounting frame (22), and a fixing member fixed on the mounting frame (22) is symmetrically arranged with the guide through hole (23). A top block (24), the end of the fixed top block (24) is a protruding fixed top plate (25), auxiliary sliding rods (26) are symmetrically fixedly arranged on both sides of the outside of the vertical air inlet cylinder (21), an auxiliary air cylinder (27) is symmetrically fixedly arranged on the vertical air inlet cylinder (21) below the auxiliary sliding rod (26), the auxiliary air cylinder (27) is connected to the vertical air inlet cylinder (21), and supporting fixing plates (28) are symmetrically fixedly arranged at both ends of the inside of the vertical air inlet cylinder (21), and an inclined fixing plate (28) is fixedly arranged on the supporting fixing plate (28). A mounting block (29) is fixedly provided on the upper side of one end of the air inlet channel (2) away from the centrifugal fan body (1), the mounting block (29) is provided with a mounting hole (291), the mounting hole (291) is connected to the air inlet channel (2), a horizontal support plate (201) is fixedly provided at the port of one end of the air inlet channel (2) away from the centrifugal fan body (1), a support guide plate (202) is fixedly provided on the horizontal support plate (201), and limited spacers are symmetrically fixedly provided on both sides of the support guide plate (202). A guide rod (203) is provided at the position of the air inlet channel (2), support side blocks (204) are symmetrically fixedly arranged on both sides of one end of the air inlet channel (2) away from the centrifugal fan body (1), a support matching hole (205) is opened on the support side block (204), a support round rod (12) is inserted into the support matching hole (205), and an arch frame (206) is fixedly arranged on the upper end of the support side block (204), and a bearing plate (207) is fixedly arranged at the middle position of the upper end of the arch frame (206), and a high-efficiency cleaning mechanism is installed on the air inlet channel (2); The high-efficiency cleaning mechanism comprises a motor (3), a free drive plate (4), a long connecting plate (5), a movable connecting plate (6), a through-hole blocking plate (7), a first connecting spring (74), a fixed locking plate (8) and a second connecting spring (83); the motor (3) is fixedly mounted on the bearing plate (207), and a rotating shaft (31) is mounted on the motor (3); the rotating shaft (31) passes through the bearing plate (207) and is inserted into the mounting hole (291); Two half-circle gears (32) are fixedly arranged on the rotating shaft (31), and the half-circle gears (32) are located outside the air inlet channel (2); a cleaning brush (34) is fixedly arranged on the circumference of the lower end of the rotating shaft (31), and the cleaning brush (34) is located in the air inlet channel (2); The free drive plate (4) is symmetrically provided with guide sliding holes (41) on both sides, and a limit guide rod (203) is inserted into the guide sliding hole (41), and a first rack (42) is fixedly provided on one side end of the free drive plate (4), and a second rack (43) is fixedly provided on the upper end of the other side of the free drive plate (4), and a support connecting plate (45) is welded to one end of the first rack (42) and the second rack (43) away from the free drive plate (4), and a first hinge frame (46) is symmetrically fixedly provided on both sides of the lower end of the support connecting plate (45), and a first matching hinge rod (47) is hingedly connected to the first hinge frame (46), and the other end of the first matching hinge rod (47) is hingedly connected to the long connecting plate (5); A second hinged frame (51) is fixedly provided on one end of the long connecting plate (5) close to the arch frame (206), the second hinged frame (51) being hinged to the first matching hinge rod (47), and a mounting round rod (52) is fixedly provided on one end of the long connecting plate (5) away from the arch frame (206), a first matching plug plate (53) is fixedly provided on the mounting round rod (52), and the first matching plug plate (53) is plugged into the auxiliary air duct (27); A connecting vertical plate (54) is fixedly provided on the upper side of one end of the long connecting plate (5) away from the arch frame (206), a horizontal support plate (55) is fixedly provided on the connecting vertical plate (54), a vertical sleeve plate (56) is fixedly provided on the side of the horizontal support plate (55) away from the connecting vertical plate (54), a matching guide hole (57) is opened on the vertical sleeve plate (56), an auxiliary sliding rod (26) is inserted into the matching guide hole (57), and a second matching hinge rod (58) is hinged on the upper end of the vertical sleeve plate (56); The upper end of the second matching hinge rod (58) is hingedly connected to a movable connecting plate (6), a supporting connecting rod (61) is fixedly arranged at the middle position of the lower end of the movable connecting plate (6), fixed pressure strips (62) are symmetrically fixedly arranged at both ends of the supporting connecting rod (61), a fixed pressure block (63) is fixedly arranged on the fixed pressure strip (62), and a matching bottom block (64) is fixedly arranged at the lower end of the supporting connecting rod (61); Support rods (65) are symmetrically fixedly arranged at both ends of the matching bottom block (64), and a second matching plug plate (66) is fixedly arranged at the lower end of the matching bottom block (64), air inlet holes (67) are symmetrically opened at both ends of the second matching plug plate (66), and two through-hole blocking plates (7) are symmetrically installed on the second matching plug plate (66), and the second matching plug plate (66) is plugged into the vertical air inlet tube (21); A connecting support plate (71) is fixedly provided at one end of the upper end surface of the through hole blocking plate (7) away from the supporting connecting rod (61), a matching plug hole (72) is provided on the connecting support plate (71), a supporting supporting rod (65) is inserted into the matching plug hole (72), and an arc-shaped rod matching hole (73) is provided on the connecting support plate (71) on the upper side of the matching plug hole (72), a first connecting spring (74) is sleeved on the supporting supporting rod (65), and a lower convex plate (75) is fixedly provided at one end of the lower side of the through hole blocking plate (7) close to the supporting connecting rod (61), and a cylindrical driving rod (76) is fixedly provided at the lower end of the lower convex plate (75); A fixed locking plate (8) is hingedly connected to the upper end of the connecting support plate (71); an inclined surface protrusion (81) is fixedly provided on the upper end surface of the fixed locking plate (8) close to one end of the supporting connecting rod (61); an arc-shaped bent rod (82) is fixedly provided on the lower end surface of the fixed locking plate (8); the arc-shaped bent rod (82) is inserted into the arc-shaped rod matching hole (73), and a second connecting spring (83) is sleeved on the arc-shaped bent rod (82).

2. The anti-blocking centrifugal fan according to claim 1, characterized in that: A bearing (33) is sleeved on the rotating shaft (31), and the bearing (33) is installed in the installation hole (291).

3. The anti-blocking centrifugal fan according to claim 2, characterized in that: The through hole blocking plate (7) is located on the lower side of the second matching plug plate (66).

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