Outdoor centrifugal fan with protection assembly

Abstract

The invention relates to the technical field of centrifugal fans, in particular to an outdoor centrifugal fan with a protection assembly, which comprises a fan shell, a base is fixedly mounted at the lower end of the fan shell, an impeller disc is rotatably mounted in an inner cavity of the fan shell, and a fan impeller is fixedly mounted on the outer side of the impeller disc; a circular shaft is rotatably mounted in an inner cavity of the fan shell, the impeller disc is connected to the circular shaft in a sleeving mode, a circular mounting groove is formed in one side of the fan shell, and a circular pipe is fixedly mounted in the circular mounting groove. Therefore, impurities and the like in external air are prevented from entering the fan to damage parts in the fan; the output shaft drives the circular shaft to rotate, the circular shaft drives the cylinder to rotate through the polygonal butt joint, the cylinder drives the locking mechanism to rotate, and the locking mechanism drives the synchronous circular block and the rotating shaft to rotate synchronously.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal fans, in particular to an outdoor centrifugal fan with a protective component. Background Art

[0002] A centrifugal fan is a driven fluid machine that relies on input mechanical energy to increase gas pressure and discharge the gas. Centrifugal fans are widely used for ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; ventilation and air induction in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; grain drying and conveying; wind tunnel air sources; and hovercraft inflation and propulsion.

[0003] When using a centrifugal fan, especially when used outdoors, a protective cover is installed at its air inlet port to prevent foreign objects from entering the fan. The ventilation gaps or vents between the partitions on the protective cover of traditional centrifugal fans are fixed in size, resulting in a relatively fixed ventilation volume of the centrifugal fan. When encountering rainy weather, especially heavy rain or rainstorms, rainwater enters the fan through the vents on the protective cover, causing corrosion to the internal structure of the fan or destroying the dynamic balance of the impeller, thereby shortening the service life of the centrifugal fan. Summary of the Invention

[0004] The object of the present invention is to provide an outdoor centrifugal fan with a protective assembly to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an outdoor centrifugal fan with a protective assembly, comprising a fan housing, a base fixedly mounted at the lower end of the fan housing, an impeller disk rotatably mounted in the inner cavity of the fan housing, and a fan impeller fixedly mounted on the outer side of the impeller disk; A circular shaft is rotatably installed in the inner cavity of the fan housing, and the impeller disk is sleeved on the circular shaft. A circular mounting groove is provided on one side of the fan housing, and a circular tube is fixedly installed in the circular mounting groove. A filter box is fixedly sleeved on the end of the circular tube away from the fan housing, and an air inlet is provided on the side of the filter box away from the circular tube. Wind guide plates that can swing up and down are equidistantly installed from top to bottom in the air inlet, a protective box is fixedly installed on one side of the filter box, and a transmission mechanism for driving the wind guide plates to swing up and down is installed in the protective box. A downward pressure mechanism is fixedly installed on the upper end of the filter box, and the downward pressure mechanism is used to drive the transmission mechanism.

[0006] As a further solution of the present invention, a circular groove is provided through the side of the impeller disk, and a plurality of strip grooves are provided on the inner wall of the circular groove in an annular array, wherein a threaded groove is provided through the bottom of one of the strip grooves extending outward, and a plurality of docking plates are fixedly connected to the cylindrical surface of the circular shaft in an annular array, each docking plate is movably connected to a strip groove, and a positioning hole is provided through the side of each docking plate.

[0007] As a further solution of the present invention, a positioning mechanism is installed in the thread groove, and the positioning mechanism includes a self-locking screw installed in the thread groove. The end of the self-locking screw is fixedly connected to a positioning column, and the end of the positioning column away from the self-locking screw is plugged into the positioning hole.

[0008] As a further solution of the present invention, the two ends of the air deflector are symmetrically fixedly connected with rotating shafts, and the two ends of each air deflector are rotatably connected to the two side walls of the filter box through the rotating shafts, and a rotating shaft at one end of each air deflector passes through the side wall of the filter box and extends into the protective box; The transmission mechanism includes a rack plate that is slidably installed in the inner cavity of the protective box. One side of the rack plate with teeth is equidistantly meshed with multiple transmission gears from top to bottom. Each transmission gear is fixedly sleeved on a rotating shaft. The lower end of the rack plate is fixedly connected to a lower pressure plate. A reset elastic sheet is installed at the lower end of the lower pressure plate. The lower end of the reset elastic sheet abuts against the lower end of the inner cavity of the protective box.

[0009] As a further solution of the present invention, the downward pressure mechanism includes a sliding rod symmetrically fixed on the upper end of the filter box, a return spring is sleeved on the sliding rod, a water collecting bucket that can move up and down is arranged between the two sliding rods, and a plurality of drainage outlets are provided at the bottom of the water collecting bucket, and a lifting seat is symmetrically fixed on the left and right sides of the water collecting bucket, and the two lifting seats are respectively sleeved on the two sliding rods, and the lifting seats are connected to the adjacent sliding rods for sliding up and down, and the upper and lower ends of the return spring are respectively abutted against the lifting seat and the filter box, and the upper end of the sliding rod is fixedly sleeved with an anti-slip ring, and an L-shaped plate is fixedly installed on one side of the water collecting bucket, and the lower end of the L-shaped plate penetrates downward through the upper end of the protective box and extends to its inner cavity, and the lower end of the L-shaped plate contacts the upper end of the rack plate.

[0010] As a further solution of the present invention, a through groove is provided on the side of the protective box, and a push plate is installed in the through groove for sliding up and down, one end of the push plate is fixedly connected to the rack plate, and an electric push rod is fixedly installed on the side of the protective box, and the end of the inner rod of the electric push rod is in contact with the upper end of the push plate. A rain sensor and a controller are installed on the base, and the rain sensor is used to detect the rainfall and output a sensing signal. The input port of the controller is connected to the rain sensor through a signal line, and the controller is used to receive the sensing signal and generate a control instruction, and the output port of the controller is connected to the electric push rod through a signal line.

[0011] As a further solution of the present invention, a replacement slot is provided through the side of the filter box, a support seat is slidably inserted into the replacement slot, a circular mounting opening is provided through the side of the support seat, and an automatically cleanable filter mechanism is installed in the circular mounting opening; The filter mechanism includes a support frame fixedly installed in the circular mounting opening, a filter screen is fixedly installed at one end of the circular mounting opening close to the air inlet, one side of the filter screen is in contact with the support frame, a rotating shaft is rotatably installed on the side of the filter screen, one end of the rotating shaft is fixedly sleeved with a connecting ring, and the side of the connecting ring is fixedly connected to a rotating plate, a cleaning cotton is fixedly installed on the side of the rotating plate close to the filter screen, the other end of the rotating shaft passes through the filter screen and the support frame in sequence and is fixedly connected to a synchronous circular block, a plurality of slots are provided on the side of the synchronous circular block in an annular array, a rotating mechanism is provided on the side of the synchronous circular block away from the rotating shaft, the rotating mechanism is installed in the inner cavity of the circular tube, and the end of the rotating mechanism away from the synchronous circular block is connected to the circular shaft.

[0012] As a further solution of the present invention, the rotating shaft is rotationally connected to the support frame and the filter screen respectively, the cleaning cotton is in sliding contact with the side of the filter screen, the connecting ring is in rotational contact with the side of the filter screen away from the support frame, and the synchronization circle is in rotational contact with the side of the support frame away from the filter screen.

[0013] As a further solution of the present invention, the rotating mechanism includes a positioning frame fixedly installed in the inner cavity of the circular tube, a cylinder is inserted through the side of the positioning frame, two limiting rings are fixedly sleeved on the cylinder, and the two limiting rings are symmetrically distributed on both sides of the positioning frame, a polygonal docking groove is provided at one end of the cylinder close to the circular axis, a polygonal docking joint is fixedly connected to one end of the circular axis close to the cylinder, the polygonal docking joint is plugged into the polygonal docking groove, a polygonal contraction groove is provided at the end of the cylinder away from the synchronization block, a locking mechanism is installed in the polygonal contraction groove, and the locking mechanism is connected to the synchronization block.

[0014] As a further solution of the present invention, the locking mechanism includes a polygonal insertion rod slidably installed in the polygonal contraction groove, a locking spring is installed between one end of the polygonal insertion rod and the innermost end of the polygonal contraction groove, a movable groove is opened outwardly through one side of the polygonal contraction groove, a slider is fixedly connected to the side of the polygonal insertion rod close to the movable groove, the slider passes through the movable groove and extends to the outside, the slider is slidably connected to the movable groove, a transmission round block is fixedly connected to the end of the polygonal insertion rod away from the locking spring, and a plurality of clamping blocks are fixedly connected to the side of the transmission round block away from the polygonal insertion rod in an annular array, and the clamping blocks are clamped in the clamping groove; A limiting groove is provided at the lower end of the circular tube, and a driving plate is inserted into the limiting groove from top to bottom. Two fan-shaped plates are fixedly sleeved on the driving plate, and the two fan-shaped plates are respectively arranged on the inner and outer walls of the circular tube. The limiting groove is sealed by the fan-shaped plates, and the driving plate is slidably connected to the limiting groove. An annular plate is fixedly connected to the upper end of the driving plate, and the annular plate is sleeved on the cylinder.

[0015] The beneficial effects of the present invention are: 1. When the centrifugal fan is working, the impurities in the air flow are filtered through the filter screen, thereby preventing impurities in the external air from entering the fan and causing damage to the internal parts of the fan; the circular shaft is driven to rotate by the output shaft, and the circular shaft drives the cylinder to rotate through the polygonal joint, and the cylinder drives the locking mechanism to rotate, and the locking mechanism drives the synchronous circle block and the rotating shaft to rotate synchronously, and the rotating shaft drives the rotating plate to rotate through the connecting ring, and the rotating plate drives the cleaning cotton to rotate along the filter screen, so that the impurities on the filter screen can be automatically cleaned to prevent the impurities from clogging the mesh of the filter screen, so that the filter screen can continue to perform filtering operations.

[0016] 2. When the filter mechanism needs to be replaced or cleaned after long-term use, push the drive plate to make the annular plate push the slider to move, so that the block in the locking mechanism is removed from the slot, and then the support seat and the filter mechanism can be removed from the filter box; when installing, first retract the polygonal plug rod into the polygonal contraction slot, and then insert the support seat and the filter mechanism along the replacement slot. At this time, if the block is just aligned with the slot, the block will be stuck in the slot; if the block is not aligned with the slot and is staggered with each other, the circular shaft will rotate and the locking mechanism will be driven to rotate through the cylinder. At this time, the block will rotate. When the block rotates to align with the slot, the block will be stuck in the slot to complete the connection.

[0017] 3. The filter mechanism, impeller disc and fan impeller in this application are all detachable and can be installed, and the disassembly and installation methods are simple and convenient, which is convenient for later cleaning, maintenance or replacement. When a component is damaged, only the damaged component needs to be replaced, which greatly saves the later maintenance cost and improves the efficiency of later maintenance.

[0018] 4. When it rains, the L-shaped plate in the downward pressure mechanism pushes the rack plate downward, so that the transmission mechanism drives the air guide plates to swing downward, so that the multiple air guide plates slowly approach each other, reducing the gaps between the air guide plates. At this time, the air guide plates are tilted downward, which can effectively prevent external rainwater from entering the filter box through the gaps between the air guide plates. When the rain stops, the L-shaped plate in the downward pressure mechanism releases the downward thrust on the rack plate, so that the multiple air guide plates on the side outside the filter box swing upward, so that the multiple air guide plates slowly move away from each other, increasing the gaps between the air guide plates, and completing the resetting of the air guide plates.

[0019] 5. On rainy days, rain drops fall onto the rain sensor, which outputs a voltage signal according to the actual rainfall. After receiving the sensing signal, the controller generates a control instruction to control the inner rod of the electric push rod to extend downward, and the inner rod of the electric push rod pushes the push plate to slide downward along the through groove, and the push plate drives the rack plate to move downward, so that the transmission mechanism drives the wind guide plate to swing downward; when the rain stops, the rain sensor stops outputting the voltage signal, and the controller controls the inner rod of the electric push rod to retract upward, so that the inner rod of the electric push rod releases the downward push on the push plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of the structure of an outdoor centrifugal fan with a protective assembly according to the present invention; Figure 2 This is a cross-sectional view of the structure of an outdoor centrifugal fan with a protective component according to the present invention; Figure 3 for Figure 2 A schematic diagram of the structure at center A; Figure 4 A side sectional view of the fan housing structure of the present invention; Figure 5 It is a side cross-sectional view of the impeller disc and docking plate structure of the present invention; Figure 6 This is an exploded view of the impeller disk, circular shaft, docking plate and positioning mechanism structure of the present invention; Figure 7 This is an exploded view of the filter box, support base, filter mechanism, rotating mechanism and locking mechanism of the present invention; Figure 8 This is a cross-sectional view of the protective box structure of the present invention; Figure 9 This is an exploded view of the filter box, air guide plate, transmission mechanism and downward pressure mechanism of the present invention; Figure 10 This is an exploded view of the filter box, air guide plate, transmission mechanism, electric push rod, rain sensor and controller structure of the present invention.

[0021] In the figure: 1. Fan housing; 11. Base; 12. Round tube; 13. Filter box; 14. Limiting groove; 15. Drive plate; 16. Sector plate; 17. Protective box; 2. Impeller disc; 21. Fan impeller; 22. Round groove; 23. Strip groove; 24. Threaded groove; 3. Round shaft; 31. Docking plate; 32. Positioning hole; 33. Polygonal docking joint; 4. Self-locking screw; 41. Positioning column; 5. Support seat; 51. Support frame; 52. Filter; 53. Rotating shaft; 54. Rotating plate; 55. Cleaning cotton; 56. Synchronous round block ;57. Slot;6. Positioning frame;61. Cylinder;62. Polygonal docking groove;63. Polygonal shrinkage groove;64. Polygonal insertion rod;65. Locking spring;66. Transmission round block;67. Block;68. Slider;7. Air guide plate;71. Transmission gear;72. Rack plate;73. Lower pressure plate;74. Reset elastic sheet;8. Water collecting bucket;81. Drain outlet;82. Lifting seat;83. Sliding rod;84. Reset spring;85. L-shaped plate;9. Electric push rod;91. Push plate;92. Rain sensor;93. Controller. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0023] See also Figures 1 to 10 The present invention provides a technical solution: an outdoor centrifugal fan with a protective component, comprising a fan housing 1, a base 11 fixedly mounted at the lower end of the fan housing 1, an impeller disk 2 rotatably mounted in the inner cavity of the fan housing 1, and a fan impeller 21 fixedly mounted on the outer side of the impeller disk 2; A circular shaft 3 is rotatably installed in the inner cavity of the fan casing 1, and the impeller disk 2 is sleeved on the circular shaft 3. A circular mounting groove is provided on one side of the fan casing 1, and a circular tube 12 is fixedly installed in the circular mounting groove. A filter box 13 is fixedly sleeved on the end of the circular tube 12 away from the fan casing 1, and an air inlet is provided on the side of the filter box 13 away from the circular tube 12. Wind guide plates 7 that can swing up and down are equidistantly installed from top to bottom in the air inlet, a protective box 17 is fixedly installed on one side of the filter box 13, and a transmission mechanism for driving the wind guide plate 7 to swing up and down is installed in the protective box 17. A downward pressure mechanism is fixedly installed on the upper end of the filter box 13, and the downward pressure mechanism is used to drive the transmission mechanism.

[0024] The impeller disc 2 is driven to rotate by the circular shaft 3, and the impeller disc 2 drives the fan impeller 21 to rotate. The circular shaft 3 is driven by the output shaft of the motor fixedly mounted on the upper end of the base 11. The motor can be an AC asynchronous motor, a permanent magnet synchronous motor, etc., and is selected according to actual needs.

[0025] The downward pressing mechanism will move downward only when it rains, thereby operating the transmission mechanism, which drives the air guide plates 7 to swing downward, thereby reducing the spacing between the multiple air guide plates 7.

[0026] See also Figure 2 、 Figures 4 to 6 A circular groove 22 is provided on the side of the impeller disk 2, and a plurality of strip grooves 23 are provided on the inner wall of the circular groove 22 in an annular array. A threaded groove 24 is provided at the bottom of one of the strip grooves 23. One end of the strip groove 23 passes through one side of the impeller disk 2, and the other end of the strip groove 23 does not pass through the impeller disk 2. One end of the strip groove 23 passes through the impeller disk 2 and is away from the circular mounting groove. The cylindrical surface of the circular shaft 3 is fixedly connected with a plurality of docking plates 31 in an annular array, and each docking plate 31 is movably plugged into a strip groove 23. A positioning hole 32 is provided on the side of each docking plate 31. When the docking plate 31 is plugged into the strip groove 23, a positioning hole 32 close to the threaded groove 24 is aligned with the threaded groove 24.

[0027] The number of the strip grooves 23 can also be set to one, and the number of the docking plates 31 is always the same as the number of the strip grooves 23 .

[0028] See also Figure 5 and Figure 6 A positioning mechanism is installed in the thread groove 24, and the positioning mechanism includes a self-locking screw 4 installed in the thread groove 24. The end of the self-locking screw 4 is fixedly connected to a positioning column 41, and the end of the positioning column 41 away from the self-locking screw 4 is plugged into the positioning hole 32.

[0029] The diameter of the positioning post 41 is smaller than the minimum inner diameter of the thread groove 24 , and the positioning post 41 can slide up and down along the thread groove 24 .

[0030] The impeller disc 2 and the circular shaft 3 are detachably mounted, and the disassembly and installation methods are simple and convenient, making it easy to clean, repair or replace the impeller disc 2 and the fan impeller 21 at a later time.

[0031] When removing the impeller disc 2, the self-locking screw 4 is unscrewed outward along the threaded groove 24. The self-locking screw 4 drives the positioning column 41 to move out of the positioning hole 32. At this time, the impeller disc 2 can be pulled outward to remove the impeller disc 2 from the circular shaft 3. During this process, the circular groove 22 of the impeller disc 2 slides along the circular shaft 3, and the strip groove 23 slides along the docking plate 31 until they are completely separated, thereby completing the disassembly of the impeller disc 2.

[0032] When installing the impeller disc 2, align the circular groove 22 of the impeller disc 2 with the circular shaft 3, and align each strip groove 23 with a docking plate 31; Push the impeller disc 2 and slowly sleeve it onto the circular shaft 3, so that the circular groove 22 slides along the circular shaft 3 and the strip groove 23 slides along the docking plate 31 until one end of the docking plate 31 abuts against the end of the strip groove 23 that does not penetrate the impeller disc 2. Stop pushing the impeller disc 2, and at this time, the threaded groove 24 is aligned with a positioning hole 32. Then screw the self-locking screw 4 inward along the thread groove 24, and the self-locking screw 4 drives the positioning column 41 to be inserted into the positioning hole 32, thereby locking the docking plate 31. The positioning mechanism is provided to firmly lock the docking plate 31 in the impeller disk 2, thereby completing the installation of the impeller disk 2, so that the impeller disk 2 can move synchronously with the circular shaft 3.

[0033] When the circular shaft 3 rotates, the impeller disc 2 is driven to rotate synchronously through the docking plate 31 .

[0034] See also Figure 1 、 Figure 2 、 Figures 8 to 10 , the two ends of the air guide plate 7 are symmetrically fixedly connected with a rotating shaft, and the two ends of each air guide plate 7 are rotatably connected to the two side walls of the filter box 13 through the rotating shaft, and a rotating shaft at one end of each air guide plate 7 passes through the side wall of the filter box 13 and extends into the protective box 17; The transmission mechanism includes a rack plate 72 that is slidably installed in the inner cavity of the protective box 17. The rack plate 72 is away from the side with the teeth and is in sliding contact with the inner wall of the protective box 17. The side of the rack plate 72 with the teeth is equidistantly meshed with multiple transmission gears 71 from top to bottom. Each transmission gear 71 is fixedly sleeved on a rotating shaft. The transmission gear 71 is rotatably connected to the filter box 13 through the rotating shaft. The lower end of the rack plate 72 is fixedly connected to the lower pressure plate 73. The lower end of the lower pressure plate 73 is installed with a reset elastic sheet 74. The lower end of the reset elastic sheet 74 abuts against the lower end of the inner cavity of the protective box 17, and the reset elastic sheet 74 applies an upward elastic force to the lower pressure plate 73.

[0035] When it rains, the rack plate 72 is pushed downward by an external force, and the rack plate 72 drives the multiple transmission gears 71 to rotate. Each transmission gear 71 drives the side of the air guide plate 7 outside the filter box 13 to swing downward through the rotating shaft, so that the multiple air guide plates 7 slowly approach each other, reducing the gaps between the air guide plates 7. At this time, the air guide plates 7 are tilted downward, thereby effectively preventing external rainwater from entering the filter box 13 through the gaps between the air guide plates 7. When the rack plate 72 moves downward, it drives the lower pressing plate 73 to move downward synchronously. When the lower pressing plate 73 moves downward, it presses the resetting elastic piece 74 .

[0036] When the force pushing the rack plate 72 downward disappears, the lower pressure plate 73 moves upward under the elastic force of the reset elastic sheet 74, and the lower pressure plate 73 drives the rack plate 72 to move upward. While the rack plate 72 moves upward, it drives multiple transmission gears 71 to rotate in the opposite direction, so that the multiple air guide plates 7 on the side outside the filter box 13 swing upward, so that the multiple air guide plates 7 slowly move away from each other, increase the gap between the air guide plates 7, and complete the reset of the air guide plates 7.

[0037] See also Figure 1 、 Figure 8 and Figure 9 The lower end of the L-shaped plate 85 is fixedly mounted on the upper end of the protection box 17 and extends to its inner cavity. The L-shaped plate 85 is slidably connected to the protection box 17 up and down, and the lower end of the L-shaped plate 85 contacts the upper end of the rack plate 72.

[0038] An overflow notch is provided on one side of the water collecting bucket 8. When more water is collected in the water collecting bucket 8, the rainwater flows outward along the overflow notch.

[0039] When it rains, the rain drops into the water collecting bucket 8 and is collected, and some of the rain flows down along the drain outlet 81; When the amount of rainwater collected in the water collecting bucket 8 is greater than the amount of rainwater discharged from the drain outlet 81, the water collecting bucket 8 moves downward under the action of the gravity of the rainwater, and the water collecting bucket 8 drives the lifting seat 82 to slide downward along the slide rod 83. The lifting seat 82 squeezes the return spring 84 and drives the L-shaped plate 85 to move downward through the water collecting bucket 8. At this time, the lower end of the L-shaped plate 85 is inserted into the inner cavity of the protective box 17, and the rack plate 72 is pushed downward through the L-shaped plate 85, so that the transmission mechanism drives the air guide plate 7 to swing downward.

[0040] When the rain stops, the rainwater in the water collecting bucket 8 will slowly flow out, and the water collecting bucket 8 will lose the gravity of the rainwater. At this time, the water collecting bucket 8 will move upward under the action of the elastic force of the reset spring 84, and the water collecting bucket 8 will drive the L-shaped plate 85 to move upward, so that the L-shaped plate 85 releases the downward thrust on the rack plate 72.

[0041] See also Figure 1 and Figure 10 A through slot is provided on the side of the protective box 17, and a push plate 91 is installed in the through slot for sliding up and down. One end of the push plate 91 is fixedly connected to the rack plate 72. An electric push rod 9 is fixedly installed on the side of the protective box 17, and the end of the inner rod of the electric push rod 9 contacts the upper end of the push plate 91. A rain sensor 92 and a controller 93 are installed on the base 11. The rain sensor 92 is used to detect rainfall and output a sensing signal. The input port of the controller 93 is connected to the rain sensor 92 through a signal line. The controller 93 is used to receive the sensing signal and generate a control instruction. The output port of the controller 93 is connected to the electric push rod 9 through a signal line, and the extension and retraction of the inner rod of the electric push rod 9 is controlled by the controller 93.

[0042] The amplitude of the voltage signal output by the rain sensor 92 is directly proportional to the amount of rainfall, that is, the greater the amount of rainfall, the higher the output voltage.

[0043] On rainy days, rain drops fall onto the rain sensor 92, which outputs a voltage signal according to the actual rainfall. After receiving the sensing signal, the controller 93 generates a control instruction, thereby controlling the inner rod of the electric push rod 9 to extend downward, and the inner rod of the electric push rod 9 pushes the push plate 91 to slide downward along the through groove, and the push plate 91 drives the rack plate 72 to move downward, so that the transmission mechanism drives the wind guide plate 7 to swing downward.

[0044] When the rain stops, the rain sensor 92 stops outputting the voltage signal, and the controller 93 controls the inner rod of the electric push rod 9 to retract upward, so that the inner rod of the electric push rod 9 releases the downward push on the push plate 91.

[0045] See also Figure 2 、 Figure 3 、 Figure 7 and Figure 9 The side of the filter box 13 is provided with a replacement slot, in which a support seat 5 is slidably inserted, and the side of the support seat 5 is provided with a circular mounting opening, in which a filter mechanism that can be automatically cleaned is installed; The support seat 5 is in contact with the upper side wall, the lower side wall, and the inner side wall of the inner cavity of the filter box 13 where the replacement slot is not provided. The inner cavity of the filter box 13 is divided by the support seat 5. The airflow blown into the filter box 13 through the air inlet needs to pass through the circular mounting opening before entering the circular tube 12. The circular mounting opening is aligned with the inner cavity of the circular tube 12, so that the airflow can be blown into the inner cavity of the circular tube 12 along the circular mounting opening. The filtering mechanism includes a support frame 51 fixedly installed in a circular mounting port, and a filter screen 52 is fixedly installed at one end of the circular mounting port close to the air inlet, and one side of the filter screen 52 is in contact with the support frame 51. The filter screen 52 and the support frame 51 are connected by bolts or by a detachable structure. A rotating shaft 53 is rotatably installed on the side of the filter screen 52, and a connecting ring is fixedly sleeved on one end of the rotating shaft 53. A rotating plate 54 is fixedly connected to the side of the connecting ring. A cleaning cotton 55 is fixedly installed on the side of the rotating plate 54 close to the filter screen 52, and the other end of the rotating shaft 53 passes through the filter screen 52 and the support frame 51 in sequence and is fixedly connected to a synchronous circular block 56. A plurality of card slots 57 are provided on the side of the synchronous circular block 56 in a circular array. A rotating mechanism is provided on the side of the synchronous circular block 56 away from the rotating shaft 53. The rotating mechanism is installed in the inner cavity of the circular tube 12, and the end of the rotating mechanism away from the synchronous circular block 56 is connected to the circular shaft 3.

[0046] The rotating shaft 53 is rotationally connected to the support frame 51 and the filter screen 52 respectively, the cleaning cotton 55 is in sliding contact with the side of the filter screen 52, the connecting ring is in rotational contact with the side of the filter screen 52 away from the support frame 51, and the synchronization circle 56 is in rotational contact with the side of the support frame 51 away from the filter screen 52. The rotating shaft 53 can rotate stably through the provided connecting ring and synchronization circle 56.

[0047] The airflow passing through the circular installation opening and entering the circular tube 12 is filtered by the provided filter screen 52, thereby preventing impurities in the external air from entering the interior of the fan and causing damage to the internal components of the fan.

[0048] The synchronous rotation of the circular block 56 drives the rotating shaft 53 to rotate synchronously, and the rotating shaft 53 drives the rotating plate 54 to rotate through the connecting ring. The rotating plate 54 drives the cleaning cotton 55 to rotate along the filter 52, thereby automatically cleaning the impurities on the filter 52 to prevent the impurities from clogging the mesh of the filter 52, so that the filter 52 can continue to perform filtering operations.

[0049] The rotating shaft 53, rotating plate 54 and synchronous round block 56 are all arranged in the circular mounting opening. When the support seat 5 is pulled along the replacement groove, the rotating shaft 53, rotating plate 54 and synchronous round block 56 will not hinder the normal sliding of the support seat 5, so that the support seat 5 can be normally installed and disassembled.

[0050] The filter mechanism can be driven to be moved out of the inner cavity of the filter box 13 by the support seat 5, so as to facilitate cleaning, maintenance and replacement of the filter mechanism.

[0051] See also Figure 2 、 Figure 3 and Figure 7The rotating mechanism includes a positioning frame 6 fixedly installed in the inner cavity of the circular tube 12, and a cylinder 61 is inserted through the side of the positioning frame 6. Two limit rings are fixedly sleeved on the cylinder 61, and the two limit rings are symmetrically distributed on both sides of the positioning frame 6. The cylinder 61 is rotatably connected to the positioning frame 6, and the two limit rings are in rotational contact with the positioning frame 6. The two limit rings are set so that the cylinder 61 can rotate stably along the positioning frame 6. A polygonal docking groove 62 is provided at one end of the cylinder 61 close to the circular shaft 3, and a polygonal docking joint 33 is fixedly connected to one end of the circular shaft 3 close to the cylinder 61. The polygonal docking joint 33 is inserted into the polygonal docking groove 62, and a polygonal contraction groove 63 is provided at one end of the cylinder 61 away from the synchronization block 56. A locking mechanism is installed in the polygonal contraction groove 63, and the locking mechanism is connected to the synchronization block 56.

[0052] The polygonal joint 33 is driven to rotate by the circular shaft 3, the polygonal joint 33 drives the cylinder 61 to rotate, the cylinder 61 drives the locking mechanism to rotate, and the locking mechanism drives the synchronous block 56 to rotate synchronously.

[0053] The locking mechanism includes a polygonal rod 64 slidably mounted in the polygonal contraction groove 63, a locking spring 65 is installed between one end of the polygonal rod 64 and the innermost end of the polygonal contraction groove 63, a movable groove is opened outward on one side of the polygonal contraction groove 63, a slider 68 is fixedly connected to the side of the polygonal rod 64 close to the movable groove, the slider 68 passes through the movable groove and extends to the outside, the slider 68 is slidably connected to the movable groove, the end of the polygonal rod 64 away from the locking spring 65 is fixedly connected to a transmission round block 66, and a plurality of clamping blocks 67 are fixedly connected to the side of the transmission round block 66 away from the polygonal rod 64 in an annular array, and the clamping block 67 is clamped with the clamping groove 57; A limiting groove 14 is provided at the lower end of the circular tube 12, and a driving plate 15 is inserted through the limiting groove 14 from top to bottom. Two fan-shaped plates 16 are fixedly sleeved on the driving plate 15. The two fan-shaped plates 16 are respectively arranged on the inner and outer walls of the circular tube 12. The limiting groove 14 is sealed by the fan-shaped plates 16. The driving plate 15 is slidably connected to the limiting groove 14. The upper end of the driving plate 15 is fixedly connected to a ring plate, which is sleeved on the cylinder 61.

[0054] When the cylinder 61 rotates, it drives the polygonal inserting rod 64 to rotate, and the polygonal inserting rod 64 drives the transmission round block 66 to rotate. The transmission round block 66 drives the synchronous round block 56 to rotate through the clamping block 67.

[0055] When the support seat 5 and the filter mechanism need to be disassembled, the driving plate 15 is pushed, and the driving plate 15 drives the annular plate to move. After the annular plate contacts the slider 68, the driving plate 15 continues to push the driving plate 15. At this time, the slider 68 is pushed to move by the annular plate, and the slider 68 drives the polygonal rod 64 to shrink into the polygonal shrinkage groove 63. The polygonal rod 64 squeezes the locking spring 65. At the same time, the polygonal rod 64 drives the card block 67 to move through the transmission circle 66, so that the card block 67 is moved out of the card slot 57, so that the locking mechanism is separated from the synchronization circle 56, and then the support seat 5 and the filter mechanism can be disassembled from the filter box 13.

[0056] When installing the support base 5 and the filter mechanism, first retract the polygonal rod 64 into the polygonal contraction groove 63 so that the block 67 does not hinder the support base 5 from being inserted into the filter box 13. After the support base 5 and the filter mechanism are installed, loosen the push on the drive plate 15, and the polygonal rod 64 slides out of the polygonal contraction groove 63 under the elastic force of the locking spring 65. At this time, if the block 67 is just aligned with the slot 57, the block 67 is locked into the slot 57. If the block 67 is not aligned with the slot 57 and is offset from each other, the circular shaft 3 rotates and drives the locking mechanism to rotate through the cylinder 61. At this time, the block 67 rotates. When the block 67 rotates to align with the slot 57, the block 67 will be inserted into the slot 57 to complete the connection. At this time, the cylinder 61 can drive the synchronous block 56 to rotate synchronously through the locking mechanism.

[0057] Working principle: When the centrifugal fan is working, the air flow enters along the air inlet of the filter box 13, passes through the circular mounting opening of the support seat 5, flows into the inner cavity of the circular tube 12, and flows along the inner cavity of the circular tube 12 into the inner cavity of the fan housing 1; When the airflow passes through the circular installation opening, impurities in the airflow are filtered by the provided filter 52, thereby preventing impurities in the external air from entering the interior of the fan and causing damage to the internal components of the fan.

[0058] The output shaft drives the circular shaft 3 to rotate, the circular shaft 3 drives the impeller disk 2 to rotate through the docking plate 31, and the impeller disk 2 drives the fan impeller 21 to rotate; When the circular shaft 3 rotates, the polygonal docking joint 33 drives the cylinder 61 to rotate, the cylinder 61 drives the locking mechanism to rotate, the locking mechanism drives the synchronous block 56 and the rotating shaft 53 to rotate synchronously, the rotating shaft 53 drives the rotating plate 54 to rotate through the connecting ring, and the rotating plate 54 drives the cleaning cotton 55 to rotate along the filter screen 52, so that the impurities on the filter screen 52 can be automatically cleaned to prevent the impurities from clogging the mesh of the filter screen 52, so that the filter screen 52 can continue to perform filtering operations.

[0059] When the filter mechanism needs to be replaced or cleaned after long-term use, the drive plate 15 is pushed to make the annular plate push the slider 68 to move, and the slider 68 drives the polygonal rod 64 to shrink into the polygonal shrinkage groove 63. At the same time, the polygonal rod 64 drives the card block 67 to move out of the card groove 57 through the transmission circle 66, so that the locking mechanism is separated from the synchronization circle 56, and then the support seat 5 and the filter mechanism can be removed from the filter box 13.

[0060] During installation, first retract the polygonal rod 64 into the polygonal retractable groove 63, and then insert the support base 5 and the filter mechanism along the replacement groove. At this time, if the block 67 is aligned with the groove 57, the block 67 will be locked into the groove 57. If the block 67 is not aligned with the slot 57 and is offset from each other, the circular shaft 3 rotates, driving the locking mechanism to rotate through the cylinder 61, and the block 67 rotates. When the block 67 rotates to align with the slot 57, the block 67 will be inserted into the slot 57 to complete the connection.

[0061] In the present application, the filter mechanism, the impeller disc 2 and the fan impeller 21 are all detachably installed, and the disassembly and installation methods are simple and convenient, which is convenient for later cleaning, maintenance or replacement. When a component is damaged, only the damaged component needs to be replaced, which greatly saves the later maintenance cost and improves the efficiency of later maintenance.

[0062] When it rains, rainwater drops into the water collecting bucket 8 and is collected, and some rainwater flows downward along the drain outlet 81; when the amount of rainwater collected in the water collecting bucket 8 is greater than the amount of rainwater discharged from the drain outlet 81, the water collecting bucket 8 moves downward under the action of the gravity of the rainwater, causing the lifting seat 82 to squeeze the reset spring 84, and the L-shaped plate 85 is driven to move downward through the water collecting bucket 8, and the rack plate 72 is pushed downward through the L-shaped plate 85, so that the transmission mechanism drives the air guide plate 7 to swing downward, so that the multiple air guide plates 7 slowly approach each other, reducing the gap between the air guide plates 7, and at this time the air guide plates 7 are tilted obliquely downward, thereby effectively preventing external rainwater from entering the filter box 13 through the gap between the air guide plates 7.

[0063] When the rain stops, the rainwater in the water collecting bucket 8 will slowly flow out, and the water collecting bucket 8 will lose the gravity of the rainwater. At this time, the water collecting bucket 8 will move upward under the action of the elastic force of the return spring 84, and the water collecting bucket 8 will drive the L-shaped plate 85 to move upward, so that the L-shaped plate 85 releases the downward thrust on the rack plate 72; Under the elastic force of the reset elastic sheet 74, the lower pressure plate 73 moves upward, and the lower pressure plate 73 drives the rack plate 72 to move upward. The rack plate 72 moves upward and drives multiple transmission gears 71 to rotate, so that the multiple air guide plates 7 on the side outside the filter box 13 swing upward, so that the multiple air guide plates 7 slowly move away from each other, increase the gap between the air guide plates 7, and complete the reset of the air guide plates 7.

[0064] On rainy days, rain drops fall onto the rain sensor 92, which outputs a voltage signal according to the actual rainfall. After receiving the sensing signal, the controller 93 generates a control instruction, thereby controlling the inner rod of the electric push rod 9 to extend downward, and the inner rod of the electric push rod 9 pushes the push plate 91 to slide downward along the through groove, and the push plate 91 drives the rack plate 72 to move downward, so that the transmission mechanism drives the wind guide plate 7 to swing downward.

[0065] When the rain stops, the rain sensor 92 stops outputting the voltage signal, and the controller 93 controls the inner rod of the electric push rod 9 to retract upward, so that the inner rod of the electric push rod 9 releases the downward push on the push plate 91.

[0066] By setting up the downward pressure mechanism, rain sensor 92 and electric push rod 9, the transmission mechanism can operate stably. When one of them is damaged or fails, the other can continue to drive the transmission mechanism to operate and adjust the air guide plate 7, thereby preventing rainwater from entering the filter box 13.

[0067] In actual use, only the pressing mechanism can be provided, or only the electric push rod 9, the push plate 91, the rain sensor 92 and the controller 93 can be provided, or both can be provided at the same time, and the choice can be made according to the needs of the user.

[0068] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An outdoor centrifugal fan with a protective assembly, comprising a fan housing (1), a base (11) fixedly mounted at the lower end of the fan housing (1), an impeller disk (2) rotatably mounted in the inner cavity of the fan housing (1), and a fan impeller (21) fixedly mounted on the outer side of the impeller disk (2); Its characteristics are: A circular shaft (3) is rotatably mounted in the inner cavity of the fan housing (1), and the impeller disc (2) is sleeved on the circular shaft (3). A circular mounting groove is provided on one side of the fan housing (1), and a circular tube (12) is fixedly mounted in the circular mounting groove. A filter box (13) is fixedly sleeved on one end of the circular tube (12) away from the fan housing (1). An air inlet is provided on the side of the filter box (13) away from the circular tube (12), and wind guide plates (7) that can swing up and down are equidistantly mounted in the air inlet from top to bottom. A protective box (17) is fixedly mounted on one side of the filter box (13), and a transmission mechanism for driving the wind guide plates (7) to swing up and down is installed in the protective box (17). A downward pressing mechanism is fixedly mounted on the upper end of the filter box (13), and the downward pressing mechanism is used to drive the transmission mechanism.

2. The outdoor centrifugal fan with a protective assembly according to claim 1, characterized in that: A circular groove (22) is formed through the side surface of the impeller disk (2), and a plurality of strip grooves (23) are formed on the inner side wall of the circular groove (22) in an annular array, wherein a threaded groove (24) is formed through the bottom of one of the strip grooves (23) outwardly, and a plurality of docking plates (31) are fixedly connected to the cylindrical surface of the circular shaft (3) in an annular array, and each docking plate (31) is movably plugged into a strip groove (23), and a positioning hole (32) is formed through the side surface of each docking plate (31).

3. The outdoor centrifugal fan with a protective assembly according to claim 2, characterized in that: A positioning mechanism is installed in the thread groove (24), and the positioning mechanism includes a self-locking screw (4) installed in the thread groove (24). The end of the self-locking screw (4) is fixedly connected to a positioning column (41), and the end of the positioning column (41) away from the self-locking screw (4) is plugged into the positioning hole (32).

4. The outdoor centrifugal fan with a protective assembly according to claim 1, characterized in that: The two ends of the air guide plate (7) are symmetrically fixedly connected with rotating shafts, and the two ends of each air guide plate (7) are rotatably connected to the two side walls of the filter box (13) through the rotating shafts. A rotating shaft at one end of each air guide plate (7) penetrates the side wall of the filter box (13) and extends into the protective box (17); The transmission mechanism includes a rack plate (72) slidably mounted in the inner cavity of the protective box (17) up and down, a plurality of transmission gears (71) are meshed equidistantly from top to bottom on one side of the rack plate (72) having teeth, each transmission gear (71) being fixedly sleeved on a rotating shaft, a lower pressure plate (73) being fixedly connected to the lower end of the rack plate (72), a reset elastic sheet (74) being mounted on the lower end of the reset elastic sheet (74) being in contact with the lower end of the inner cavity of the protective box (17).

5. The outdoor centrifugal fan with a protective assembly according to claim 1, characterized in that: The pressing mechanism includes a slide bar (83) fixedly mounted on the upper end of the filter box (13) with a left-right symmetrical mounting seat, a return spring (84) is sleeved on the slide bar (83), a water collecting bucket (8) movable up and down is provided between the two slide bars (83), a plurality of drainage ports (81) are provided at the bottom of the water collecting bucket (8), and lifting seats (82) are symmetrically fixedly mounted on the left and right sides of the water collecting bucket (8), and the two lifting seats (82) are sleeved on the two slide bars (83), and The lifting seat (82) is connected to the adjacent slide bar (83) in an upward and downward sliding manner. The upper and lower ends of the return spring (84) are respectively in contact with the lifting seat (82) and the filter box (13). The upper end of the slide bar (83) is fixedly sleeved with an anti-slip ring. An L-shaped plate (85) is fixedly installed on one side of the water collecting bucket (8). The lower end of the L-shaped plate (85) penetrates the upper end of the protective box (17) downward and extends to its inner cavity. The lower end of the L-shaped plate (85) contacts the upper end of the rack plate (72).

6. The outdoor centrifugal fan with a protective assembly according to claim 1, characterized in that: A through slot is provided through the side of the protection box (17), and a push plate (91) is installed in the through slot so as to slide up and down. One end of the push plate (91) is fixedly connected to the rack plate (72). An electric push rod (9) is fixedly installed on the side of the protection box (17), and the end of the inner rod of the electric push rod (9) contacts the upper end of the push plate (91). A rain sensor (92) and a controller (93) are installed on the base (11). The rain sensor (92) is used to detect rainfall and output a sensing signal. The input port of the controller (93) is connected to the rain sensor (92) through a signal line. The controller (93) is used to receive the sensing signal and generate a control instruction. The output port of the controller (93) is connected to the electric push rod (9) through a signal line.

7. The outdoor centrifugal fan with a protective assembly according to claim 1, characterized in that: The side of the filter box (13) is provided with a replacement slot, a support seat (5) is slidably inserted into the replacement slot, a circular installation opening is provided on the side of the support seat (5), and an automatically cleanable filter mechanism is installed in the circular installation opening; The filtering mechanism includes a support frame (51) fixedly mounted in a circular mounting opening, a filter screen (52) fixedly mounted at one end of the circular mounting opening close to the air inlet, one side of the filter screen (52) contacts the support frame (51), a rotating shaft (53) is rotatably mounted on the side of the filter screen (52), one end of the rotating shaft (53) is fixedly sleeved with a connecting ring, and the side of the connecting ring is fixedly connected to a rotating plate (54), a cleaning cotton (55) is fixedly mounted on the side of the rotating plate (54) close to the filter screen (52), the other end of the rotating shaft (53) sequentially passes through the filter screen (52) and the support frame (51) and is fixedly connected to a synchronous circular block (56), a side of the synchronous circular block (56) is provided with a plurality of card slots (57) in an annular array, a rotating mechanism is provided on the side of the synchronous circular block (56) away from the rotating shaft (53), the rotating mechanism is mounted in the inner cavity of the circular tube (12), and the end of the rotating mechanism away from the synchronous circular block (56) is connected to the circular shaft (3).

8. The outdoor centrifugal fan with a protective assembly according to claim 7, characterized in that: The rotating shaft (53) is rotationally connected to the support frame (51) and the filter screen (52), respectively; the cleaning cotton (55) is in sliding contact with the side of the filter screen (52); the connecting ring is in rotational contact with the side of the filter screen (52) away from the support frame (51); and the synchronization circle (56) is in rotational contact with the side of the support frame (51) away from the filter screen (52).

9. The outdoor centrifugal fan with a protective assembly according to claim 7, characterized in that: The rotating mechanism includes a positioning frame (6) fixedly mounted in the inner cavity of the circular tube (12), a cylinder (61) is inserted through the side of the positioning frame (6), two limiting rings are fixedly sleeved on the cylinder (61), and the two limiting rings are symmetrically distributed on both sides of the positioning frame (6), a polygonal docking groove (62) is provided at one end of the cylinder (61) close to the circular shaft (3), a polygonal docking joint (33) is fixedly connected to one end of the circular shaft (3) close to the cylinder (61), and the polygonal docking joint (33) is plugged into the polygonal docking groove (62), and a polygonal contraction groove (63) is provided at one end of the cylinder (61) away from the synchronization block (56), a locking mechanism is installed in the polygonal contraction groove (63), and the locking mechanism is connected to the synchronization block (56).

10. The outdoor centrifugal fan with a protective assembly according to claim 9, characterized in that: The locking mechanism includes a polygonal rod (64) slidably mounted in the polygonal contraction groove (63), a locking spring (65) is mounted between one end of the polygonal rod (64) and the innermost end of the polygonal contraction groove (63), a movable groove is provided through one side of the polygonal contraction groove (63) toward the outside, a slider (68) is fixedly connected to the side of the polygonal rod (64) close to the movable groove, the slider (68) passes through the movable groove and extends to the outside, the slider (68) is slidably connected to the movable groove, an end of the polygonal rod (64) away from the locking spring (65) is fixedly connected to a transmission round block (66), a side of the transmission round block (66) away from the polygonal rod (64) is fixedly connected to a plurality of clamping blocks (67) in a ring array, and the clamping blocks (67) are clamped to the clamping groove (57); A limiting groove (14) is provided at the lower end of the circular tube (12), and a driving plate (15) is inserted through the limiting groove (14) from top to bottom. Two fan-shaped plates (16) are fixedly sleeved on the driving plate (15), and the two fan-shaped plates (16) are respectively arranged on the inner and outer walls of the circular tube (12). The limiting groove (14) is sealed by the fan-shaped plates (16). The driving plate (15) is slidably connected to the limiting groove (14), and an annular plate is fixedly connected to the upper end of the driving plate (15), and the annular plate is sleeved on the cylinder (61).

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