Outdoor centrifugal fan with a protection assembly

Abstract

The application discloses to centrifugal fan technical field, concretely is a kind of outdoor centrifugal fan with protection assembly, including fan shell, the lower end of fan shell is fixedly installed with base, the inner chamber of fan shell is rotatably installed with impeller disc, the outside of impeller disc is fixedly installed with fan impeller;The inner chamber of fan shell is rotatably installed with round shaft, impeller disc is sleeved on round shaft, the side of fan shell is provided with circular mounting groove, circular mounting groove is fixedly installed with circular tube, the beneficial effects of the present application are: centrifugal fan works, the impurities in airflow are filtered by the filter screen set, to prevent the impurities in external air from entering the inside of fan, cause the damage of the internal parts of fan;The output shaft drives the rotation of round shaft, and the round shaft drives the rotation of cylinder through polygonal adapter, and the cylinder drives the rotation of locking mechanism, and the locking mechanism drives the synchronous rotation of synchronous block and rotating shaft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal fan, in particular to an outdoor centrifugal fan with a protection assembly. BACKGROUND

[0002] The centrifugal fan is a kind of driven fluid machinery which improves the pressure of gas and discharges gas by inputting mechanical energy. The centrifugal fan is widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air induction of boilers and industrial furnaces, cooling and ventilation of air conditioning equipment and household appliances, grain drying and selection, wind tunnel air source and air cushion ship inflation and propulsion, etc.

[0003] The centrifugal fan is installed with a protective cover at the air inlet port during use, especially during outdoor use, to prevent foreign matter from entering the fan. The size of the ventilation gap or ventilation opening between the partitions of the protective cover of the traditional centrifugal fan is fixed, so that the ventilation volume of the centrifugal fan is relatively fixed. When it rains, especially when it rains heavily or heavily, rainwater enters the fan through the ventilation opening of the protective cover, causing corrosion of the internal structure of the fan or damage to the dynamic balance of the impeller, affecting the service life of the centrifugal fan. SUMMARY

[0004] The present application aims to provide an outdoor centrifugal fan with a protection assembly to solve the problems in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an outdoor centrifugal fan with a protection assembly, comprising a fan housing, a base is fixedly installed at the lower end of the fan housing, an impeller disc is rotatably installed in the inner cavity of the fan housing, and a fan impeller is fixedly installed on the outer side of the impeller disc.

[0006] A circular shaft is rotatably installed in the inner cavity of the fan housing, and the impeller disc is sleeved on the circular shaft. A circular mounting groove is formed in one side of the fan housing, and a circular pipe is fixedly installed in the circular mounting groove. A filter box is fixedly sleeved on the end of the circular pipe away from the fan housing. An air inlet is formed in one side of the filter box away from the circular pipe, and wind deflectors which can swing up and down are installed in the air inlet at equal intervals from top to bottom. A protection box is fixedly installed on one side of the filter box, and a transmission mechanism for driving the wind deflectors to swing up and down is installed in the protection box. A pressing mechanism is fixedly installed at the upper end of the filter box, and the pressing mechanism is used to drive the transmission mechanism.

[0007] As a further scheme of the present application, the side of the impeller disc is provided with a circular groove, the inner side wall of the circular groove is provided with a plurality of strip grooves in an annular array, the bottom of one of the strip grooves is provided with a threaded groove penetrating outward, the cylindrical surface of the circular shaft is fixedly connected with a plurality of butt plates in an annular array, each butt plate is movably inserted into one of the strip grooves, and the side of each butt plate is provided with a positioning hole penetrating therethrough.

[0008] As a further scheme of the present application, the threaded groove is provided with a positioning mechanism, the positioning mechanism comprises a self-locking screw installed in the threaded groove, and the end of the self-locking screw is fixedly connected with a positioning column, and the end of the positioning column away from the self-locking screw is inserted into the positioning hole.

[0009] As a further scheme of the present application, the air deflector is fixedly connected with a rotating shaft at two ends, the two ends of each air deflector are rotatably connected with the two side walls of the filter box through the rotating shaft, and one rotating shaft at one end of each air deflector extends into the protection box through the side wall of the filter box.

[0010] The transmission mechanism comprises a rack plate slidably installed in the inner cavity of the protection box, the side of the rack plate provided with teeth is engaged with a plurality of transmission gears at equal intervals from top to bottom, each transmission gear is fixedly sleeved on one rotating shaft, the lower end of the rack plate is fixedly connected with a pressing plate, the lower end of the pressing plate is provided with a reset elastic sheet, and the lower end of the reset elastic sheet abuts against the lower end of the inner cavity of the protection box.

[0011] As a further scheme of the present application, the pressing mechanism comprises a slide rod fixedly installed on the upper end of the filter box in a left-right symmetrical manner, a reset spring is sleeved on the slide rod, a water collecting basin movable up and down is arranged between the two slide rods, a plurality of drainage holes are formed in the bottom of the water collecting basin, lifting seats are fixedly installed on the left and right sides of the water collecting basin in a symmetrical manner, the two lifting seats are sleeved on the two slide rods and are slidably connected with the adjacent slide rods in an up-down manner, the upper and lower ends of the reset spring abut against the lifting seats and the filter box, a anti-coming-off ring is fixedly sleeved on the upper end of the slide rod, an L-shaped plate is fixedly installed on one side of the water collecting basin, the lower end of the L-shaped plate penetrates through the upper end of the protection box and extends into the inner cavity thereof, and the lower end of the L-shaped plate is in contact with the upper end of the rack plate.

[0012] As a further scheme of the present application, the side of the protection box is provided with a through groove penetrating therethrough, a push plate is slidably installed in the through groove, one end of the push plate is fixedly connected with the rack plate, an electric push rod is fixedly installed on the side of the protection box, 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, the rain sensor is used for detecting rainfall and outputting a sensing signal, the input port of the controller is connected with the rain sensor through a signal line, the controller is used for receiving the sensing signal and generating a control instruction, and the output port of the controller is connected with the electric push rod through a signal line.

[0013] As a further embodiment of the present invention, a replacement groove is provided through the side of the filter box, a support seat is slidably inserted into the replacement groove, a circular mounting port is provided through the side of the support seat, and an automatically cleanable filter mechanism is installed in the circular mounting port.

[0014] The filtration mechanism includes a support frame fixedly installed in a circular mounting port. A filter screen is fixedly installed at one end of the circular mounting port near the air inlet. One side of the filter screen contacts the support frame. A rotating shaft is rotatably installed on the side of the filter screen. A connecting ring is fixedly sleeved at one end of the rotating shaft. A rotating plate is fixedly connected to the side of the connecting ring. A cleaning cotton is fixedly installed on the side of the rotating plate near 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 synchronizing block. Multiple slots are formed in a circular array on the side of the synchronizing block. A rotating mechanism is provided on the side of the synchronizing 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 synchronizing block is connected to the circular shaft.

[0015] As a further embodiment of the present invention, the rotating shaft is rotatably 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 rotatable contact with the side of the filter screen away from the support frame, and the synchronizing block is in rotatable contact with the side of the support frame away from the filter screen.

[0016] As a further embodiment of the present invention, the rotating mechanism includes a positioning frame fixedly installed inside the cavity of a circular tube. A cylinder is inserted through the side of the positioning frame, and two limiting rings are fixedly sleeved on the cylinder. The two limiting rings are symmetrically distributed on both sides of the positioning frame. A polygonal mating groove is opened at the end of the cylinder near the circular shaft, and a polygonal connector is fixedly connected at the end of the circular shaft near the cylinder. The polygonal connector is inserted into the polygonal mating groove. A polygonal shrinkage groove is opened at the end of the cylinder away from the synchronizing circular block, and a locking mechanism is installed in the polygonal shrinkage groove. The locking mechanism is connected to the synchronizing circular block.

[0017] As a further embodiment of the present invention, the locking mechanism includes a polygonal insert rod slidably installed in a polygonal contraction groove. A locking spring is installed between one end of the polygonal insert rod and the innermost end of the polygonal contraction groove. A movable groove is opened through one side of the polygonal contraction groove. A slider is fixedly connected to the side of the polygonal insert rod near 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 block is fixedly connected to the end of the polygonal insert rod away from the locking spring. Multiple locking blocks are fixedly connected in a ring array on the side of the transmission block away from the polygonal insert rod. The locking blocks engage with the locking slots.

[0018] The lower end of the circular pipe is provided with a limiting groove, a driving plate is inserted through the limiting groove from top to bottom, two sector plates are fixedly sleeved on the driving plate, the two sector plates are arranged on the inner and outer walls of the circular pipe respectively, the limiting groove is sealed through the sector plates, the driving plate is in sliding connection with the limiting groove, the upper end of the driving plate is fixedly connected with an annular plate, and the annular plate is sleeved on the cylinder.

[0019] The beneficial effects of the present application are:

[0020] 1. When the centrifugal fan works, the impurities in the airflow are filtered through the filter screen, thereby preventing impurities in the external air from entering the fan, causing damage to the internal parts of the fan; the output shaft drives the circular shaft to rotate, the circular shaft drives the cylinder to rotate through the polygonal adapter, the cylinder drives the locking mechanism to rotate, the locking mechanism drives the synchronous circular block and the rotating shaft to rotate synchronously, 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, thereby automatically cleaning the impurities on the filter screen, preventing the impurities from blocking the mesh of the filter screen, and enabling the filter screen to continuously perform filtering operation.

[0021] 2. When the filter mechanism needs to be replaced or cleaned after long-term use, the driving plate is pushed, the annular plate pushes the sliding block to move, the clamping block in the locking mechanism is moved out of the clamping groove, and then the support seat and the filter mechanism can be disassembled from the filter box; during installation, the polygonal insertion rod is first retracted into the polygonal contraction groove, and then the support seat and the filter mechanism are inserted into the replacement slot; if the clamping block and the clamping groove are aligned at this time, the clamping block is clamped into the clamping groove; if the clamping block and the clamping groove are not aligned, they are offset from each other; at this time, the circular shaft is rotated, the cylinder drives the locking mechanism to rotate, the clamping block is rotated, and when the clamping block is rotated to be aligned with the clamping groove, the clamping block is clamped into the clamping groove, and the clamping is completed.

[0022] 3. The filter mechanism, impeller disc and fan impeller in the present application are detachably installed, and the dismounting and mounting modes are simple and convenient, facilitating later cleaning, maintenance or replacement; when a part is damaged, only the damaged part needs to be replaced, thereby greatly saving the later maintenance cost and improving the efficiency of later maintenance.

[0023] 4. When it rains, the L-shaped plate in the pressing mechanism pushes the rack plate to move downward, thereby driving the guide plates to swing downward, slowly approaching each other, reducing the gap between the guide plates, and at this time, the guide plates are inclined downward, thereby effectively preventing the external rainwater from entering the filter box through the gap between the guide plates; when it stops raining, the L-shaped plate in the pressing mechanism releases the downward pushing force on the rack plate, thereby driving the guide plates on one side outside the filter box to swing upward, slowly moving away from each other, increasing the gap between the guide plates, and completing the resetting of the guide plates.

[0024] 5. When it rains, raindrops fall onto the rain sensor. The rain sensor outputs a voltage signal based on the actual rainfall. After receiving the signal, the controller generates a control command, which in turn controls the inner rod of the electric push rod to extend downward. The inner rod of the electric push rod pushes the push plate to slide downward along the through groove. The push plate drives the rack plate to move downward, thereby causing the transmission mechanism to drive the wind guide plate to swing downward. When the rain stops, the rain sensor stops outputting a voltage signal, and the controller controls the inner rod of the electric push rod to retract upward, causing the inner rod of the electric push rod to release its downward push on the push plate. Attached Figure Description

[0025] Figure 1 This is a perspective view of the outdoor centrifugal fan with protective components according to the present invention.

[0026] Figure 2 This is a cross-sectional view of the outdoor centrifugal fan with protective components according to the present invention.

[0027] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0028] Figure 4 This is a side sectional view of the fan housing structure of the present invention;

[0029] Figure 5 This is a side sectional view of the impeller disk and docking plate structure of the present invention;

[0030] Figure 6 This is an exploded view of the impeller disk, circular shaft, docking plate, and positioning mechanism of the present invention;

[0031] Figure 7 Exploded view of the filter box, support base, filter mechanism, rotating mechanism and locking mechanism of the present invention;

[0032] Figure 8 This is a cross-sectional view of the protective box structure of the present invention;

[0033] Figure 9 This is an exploded view of the filter box, air guide plate, transmission mechanism and pressing mechanism of the present invention;

[0034] Figure 10 This is an exploded view of the filter box, air guide plate, transmission mechanism, electric push rod, rain sensor and controller of the present invention.

[0035] In the figure: 1, fan shell; 11, base; 12, round pipe; 13, filter box; 14, limiting groove; 15, driving plate; 16, fan-shaped plate; 17, protective box; 2, impeller disc; 21, fan impeller; 22, circular groove; 23, strip-shaped groove; 24, threaded groove; 3, round shaft; 31, butt joint plate; 32, positioning hole; 33, polygonal butt joint; 4, self-locking screw; 41, positioning column; 5, support seat; 51, support frame; 52, filter screen; 53, rotating shaft; 54, rotating plate; 55, cleaning cotton; 56, synchronous round block; 57, clamping groove; 6, positioning frame; 61, cylinder; 62, polygonal butt joint groove; 63, polygonal contraction groove; 64, polygonal insertion rod; 65, locking spring; 66, transmission round block; 67, clamping block; 68, sliding block; 7, air deflector; 71, transmission gear; 72, rack plate; 73, pressing plate; 74, reset elastic sheet; 8, water collecting hopper; 81, drainage opening; 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

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] Please refer to Figures 1 to 10 The present application provides a technical solution: an outdoor centrifugal fan with a protective assembly, comprising a fan shell 1, a base 11 fixedly installed at the lower end of the fan shell 1, an impeller disc 2 rotatably installed in the inner cavity of the fan shell 1, and a fan impeller 21 fixedly installed on the outer side of the impeller disc 2.

[0038] A round shaft 3 is rotatably installed in the inner cavity of the fan shell 1, the impeller disc 2 is sleeved on the round shaft 3, a circular mounting groove is formed in one side of the fan shell 1, a round pipe 12 is fixedly installed in the circular mounting groove, a filter box 13 is fixedly sleeved on the end of the round pipe 12 away from the fan shell 1, an air inlet is formed in one side of the filter box 13 away from the round pipe 12, air deflectors 7 capable of swinging up and down are installed in the air inlet at equal intervals from top to bottom, a protective box 17 is fixedly installed on one side of the filter box 13, a transmission mechanism for driving the air deflectors 7 to swing up and down is installed in the protective box 17, and a pressing mechanism is fixedly installed at the upper end of the filter box 13, which is used to drive the transmission mechanism.

[0039] The impeller disc 2 drives the fan impeller 21 to rotate by rotating the circular shaft 3, and the circular shaft 3 is driven by the output shaft of the motor fixedly installed at the upper end of the base 11. The motor is selected from an alternating current asynchronous motor, a permanent magnet synchronous motor and the like according to actual needs.

[0040] The downward pressing mechanism is only moved downward in rainy days, so that the transmission mechanism is operated to drive the air deflectors 7 to swing downward to reduce the spacing between the air deflectors 7.

[0041] Please refer to Figure 2 , Figures 4 to 6 , the side of the impeller disc 2 is provided with a circular groove 22, the inner side wall of the circular groove 22 is provided with a plurality of strip grooves 23 in an annular array, the bottom of one of the strip grooves 23 is provided with a threaded groove 24 outwardly and penetrates, one end of the strip groove 23 penetrates one side of the impeller disc 2, the other end of the strip groove 23 does not penetrate the impeller disc 2, the end of the strip groove 23 penetrating the impeller disc 2 is away from the circular mounting groove, the cylindrical surface of the circular shaft 3 is fixedly connected with a plurality of butt plates 31 in an annular array, each butt plate 31 is movably inserted into one strip groove 23, and each butt plate 31 is provided with a positioning hole 32 outwardly and penetrates, when the butt plate 31 is inserted into the strip groove 23, one positioning hole 32 close to the threaded groove 24 is aligned with the threaded groove 24.

[0042] The number of the strip grooves 23 can also be one, and the number of the butt plates 31 is always the same as that of the strip grooves 23.

[0043] Please refer to Figure 5 and Figure 6 , the threaded groove 24 is provided with a positioning mechanism, the positioning mechanism comprises a self-locking screw 4 installed in the threaded groove 24, and the end of the self-locking screw 4 is fixedly connected with a positioning column 41, and the end of the positioning column 41 away from the self-locking screw 4 is inserted into the positioning hole 32.

[0044] The diameter of the positioning column 41 is smaller than the minimum inner diameter of the threaded groove 24, and the positioning column 41 can slide up and down along the threaded groove 24.

[0045] The impeller disc 2 and the circular shaft 3 are detachably installed, and the detachment and installation are simple and convenient, so that the impeller disc 2 and the fan impeller 21 can be conveniently cleaned, maintained or replaced.

[0046] When the impeller disc 2 is detached, the self-locking screw 4 is screwed out of 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 outwards, so that the impeller disc 2 is moved away from the circular shaft 3, in 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 butt plate 31, until completely separated, so as to complete the detachment of the impeller disc 2.

[0047] 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-shaped groove 23 with one abutting plate 31 respectively;

[0048] Push the impeller disc 2 to slowly sleeve the impeller disc 2 on the circular shaft 3, so that the circular groove 22 slides along the circular shaft 3, and the strip-shaped groove 23 slides along the abutting plate 31, until one end of the abutting plate 31 abuts with one end of the strip-shaped groove 23 which does not penetrate the impeller disc 2, stop pushing the impeller disc 2, at this time, the threaded groove 24 is aligned with one positioning hole 32;

[0049] Then, screw the self-locking screw 4 into the threaded groove 24, the self-locking screw 4 drives the positioning column 41 to insert into the positioning hole 32, so as to lock the abutting plate 31, through the positioning mechanism, the abutting plate 31 is firmly locked in the impeller disc 2, and the installation of the impeller disc 2 is completed, so that the impeller disc 2 can move synchronously with the circular shaft 3.

[0050] When the circular shaft 3 rotates, the impeller disc 2 rotates synchronously through the abutting plate 31.

[0051] Please refer to Figure 1 、 Figure 2 、 Figures 8 to 10 , the two ends of each air deflector 7 are symmetrically and fixedly connected with the rotating shafts, and the two ends of each air deflector 7 are rotationally connected with the two side walls of the filter box 13 through the rotating shafts, and one rotating shaft at one end of each air deflector 7 extends into the protection box 17 through the side wall of the filter box 13;

[0052] The transmission mechanism comprises a rack plate 72 which is slidably installed in the inner cavity of the protection box 17, the side, away from the gear teeth, of the rack plate 72 is in sliding contact with the inner side wall of the protection box 17, the side of the rack plate 72, provided with the gear teeth, is equidistantly meshed with a plurality of transmission gears 71 from top to bottom, each transmission gear 71 is fixedly sleeved on a rotating shaft, the transmission gear 71 is rotationally connected with the filter box 13 through the rotating shaft, the lower end of the rack plate 72 is fixedly connected with a pressing plate 73, the lower end of the pressing plate 73 is provided 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 protection box 17, and the reset elastic sheet 74 applies an upward elastic force to the pressing plate 73.

[0053] When it is rainy, the rack plate 72 is driven to move downward by external force, the rack plate 72 drives the plurality of transmission gears 71 to rotate, each transmission gear 71 drives the air deflector 7 at the side outside the filter box 13 to swing downward through the rotating shaft, so that the plurality of air deflectors 7 slowly approach each other, the gap between the air deflectors 7 is reduced, and at this time, the air deflectors 7 are inclined downward, so that the external rainwater can be effectively prevented from entering the filter box 13 through the gap between the air deflectors 7;

[0054] When the rack plate 72 moves downward, the lower pressing plate 73 moves downward synchronously under the action of the rack plate 72.

[0055] When the force pushing the rack plate 72 to move downward disappears, the lower pressing plate 73 moves upward under the elastic force of the reset elastic sheet 74, and the lower pressing plate 73 drives the rack plate 72 to move upward. The rack plate 72 drives the plurality of transmission gears 71 to rotate reversely while moving upward, so that the plurality of guide vanes 7 on the side outside the filter box 13 swing upward, the plurality of guide vanes 7 slowly move away from each other, the gap between the guide vanes 7 is increased, and the reset of the guide vanes 7 is completed.

[0056] Please refer to Figure 1 , Figure 8 and Figure 9 , the lower pressing mechanism comprises a slide rod 83 fixedly installed on the upper end of the filter box 13 in left-right symmetry, a reset spring 84 sleeved on the slide rod 83, a water collecting bucket 8 movably arranged between the two slide rods 83, a plurality of drainage openings 81 formed in the bottom of the water collecting bucket 8, left-right symmetrical lifting seats 82 fixedly installed on the left and right sides of the water collecting bucket 8, the two lifting seats 82 being sleeved on the two slide rods 83 respectively, and the lifting seat 82 being movably connected with the adjacent slide rod 83, the upper and lower ends of the reset spring 84 being in abutment with the lifting seat 82 and the filter box 13 respectively, the reset spring 84 applying an upward elastic force to the lifting seat 82, the upper end of the slide rod 83 being fixedly sleeved with an anti-disengagement ring, an L-shaped plate 85 being fixedly installed on one side of the water collecting bucket 8, the lower end of the L-shaped plate 85 penetrating downward through the upper end of the protection box 17 and extending into the inner cavity of the protection box 17, the L-shaped plate 85 being movably connected with the protection box 17, and the lower end of the L-shaped plate 85 being in contact with the upper end of the rack plate 72.

[0057] An overflow gap is formed in one side of the water collecting bucket 8, and when more water is collected in the water collecting bucket 8, the rainwater flows out along the overflow gap.

[0058] When it rains, the rainwater drops into the water collecting bucket 8 for collection, and some rainwater flows out downward along the drainage openings 81;

[0059] When the amount of rainwater collected in the water collecting bucket 8 is greater than the amount of rainwater discharged through the drainage openings 81, the water collecting bucket 8 moves downward under the action of the gravity of the rainwater, the lifting seat 82 slides downward along the slide rod 83, the lifting seat 82 presses the reset spring 84, the L-shaped plate 85 moves downward under the action of the water collecting bucket 8, the lower end of the L-shaped plate 85 is inserted into the inner cavity of the protection box 17, the L-shaped plate 85 pushes the rack plate 72 to move downward, and the transmission mechanism drives the guide vanes 7 to swing downward.

[0060] When the rain stops, the rainwater in the water collecting bucket 8 will slowly flow out, and the water collecting bucket 8 loses the gravity of the rainwater. At this time, the water collecting bucket 8 is moved upward under the elastic force of the reset spring 84, and the L-shaped plate 85 is moved upward, so that the L-shaped plate 85 releases the downward pushing force on the rack plate 72.

[0061] Please refer to Figure 1 and Figure 10 , the side of the protection box 17 is provided with a through groove, and a push plate 91 is slidably installed in the through groove. One end of the push plate 91 is fixedly connected with the rack plate 72. The protection box 17 is fixedly installed with an electric push rod 9. The end of the inner rod of the electric push rod 9 is in contact with the upper end of the push plate 91. The base 11 is installed with a rainwater sensor 92 and a controller 93. The rainwater sensor 92 is used to detect the rainfall and output an induction signal. The input port of the controller 93 is connected with the rainwater sensor 92 through a signal line. The controller 93 is used to receive the induction signal and generate a control instruction. The output port of the controller 93 is connected with the electric push rod 9 through a signal line. The inner rod of the electric push rod 9 is controlled to extend and retract through the controller 93.

[0062] The voltage signal amplitude output by the rainwater sensor 92 is in a positive proportional relationship with the rainfall. That is, the greater the rainfall, the higher the output voltage.

[0063] On a rainy day, raindrops fall on the rainwater sensor 92. The rainwater sensor 92 outputs a voltage signal according to the actual rainfall. After receiving the induction signal, the controller 93 generates a control instruction to control the inner rod of the electric push rod 9 to extend downward. 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 deflector 7 to swing downward.

[0064] When the rain stops, the rainwater 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 pushing of the push plate 91.

[0065] Please refer to Figure 2 , Figure 3 , Figure 7 and Figure 9 , the side of the filter box 13 is provided with a replacement groove, and a support seat 5 is slidably inserted into the replacement groove. The side of the support seat 5 is provided with a circular mounting hole, and an automatic cleaning filter mechanism is installed in the circular mounting hole.

[0066] The support seat 5 is in contact with the upper side wall, the lower side wall and the inner side wall of the filter box 13 which is not provided with a replacement slot. The inner cavity of the filter box 13 is separated by the support seat 5. The air flow blown into the filter box 13 through the air inlet needs to pass through the circular mounting port before entering the circular pipe 12. The circular mounting port is aligned with the inner cavity of the circular pipe 12, so that the air flow can be blown into the inner cavity of the circular pipe 12 along the circular mounting port.

[0067] The filter mechanism comprises a support frame 51 fixedly installed in the circular mounting port. The circular mounting port is fixedly installed with a filter screen 52 at one end close to the air inlet. 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 a detachable structure. A rotating shaft 53 is rotatably installed on one side of the filter screen 52. A connecting ring is fixedly sleeved on one end of the rotating shaft 53. A rotating plate 54 is fixedly connected to one side of the connecting ring close to the filter screen 52. A cleaning cotton 55 is fixedly installed on one side of the rotating plate 54 close to the filter screen 52. The other end of the rotating shaft 53 penetrates the filter screen 52 and the support frame 51 in sequence and is fixedly connected with a synchronous circular block 56. A plurality of clamping grooves 57 are annularly arranged on one side of the synchronous circular block 56. A rotating mechanism is arranged on the other 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 pipe 12, and one end of the rotating mechanism away from the synchronous circular block 56 is connected with the circular shaft 3.

[0068] The rotating shaft 53 is rotatably connected with the support frame 51 and the filter screen 52. The cleaning cotton 55 is in sliding contact with one side of the filter screen 52. The connecting ring is in rotational contact with one side of the filter screen 52 away from the support frame 51. The synchronous circular block 56 is in rotational contact with one side of the support frame 51 away from the filter screen 52. The connecting ring and the synchronous circular block 56 enable the rotating shaft 53 to stably rotate.

[0069] The filter screen 52 is arranged to filter the air flow entering the circular pipe 12 through the circular mounting port, thereby preventing impurities in the external air from entering the fan and damaging the internal components of the fan.

[0070] The synchronous circular block 56 drives the rotating shaft 53 to rotate synchronously. 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 screen 52, thereby automatically cleaning the impurities on the filter screen 52 and preventing the impurities from blocking the mesh holes of the filter screen 52, so that the filter screen 52 can continuously perform the filtering operation.

[0071] The rotating shaft 53, the rotating plate 54 and the synchronous circular block 56 are arranged in the circular mounting port. When the support seat 5 is pulled along the replacement slot, the rotating shaft 53, the rotating plate 54 and the synchronous circular block 56 do not hinder the normal sliding of the support seat 5, so that the support seat 5 can be normally installed and disassembled.

[0072] The filter mechanism can be moved out of the inner cavity of the filter box 13 by the support base 5, which makes it convenient to clean, repair and replace the filter mechanism.

[0073] Please see Figure 2 , Figure 3 and Figure 7 The rotating mechanism includes a positioning frame 6 fixedly installed inside the 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. The two limiting rings are symmetrically distributed on both sides of the positioning frame 6. The cylinder 61 is rotatably connected to the positioning frame 6. Both limiting rings are in rotatable contact with the positioning frame 6. The two limiting rings enable the cylinder 61 to rotate stably along the positioning frame 6. A polygonal docking groove 62 is provided at the end of the cylinder 61 near the circular shaft 3. A polygonal connector 33 is fixedly connected at the end of the circular shaft 3 near the cylinder 61. The polygonal connector 33 is inserted into the polygonal docking groove 62. A polygonal contraction groove 63 is provided at the end of the cylinder 61 away from the synchronous circular block 56. A locking mechanism is installed in the polygonal contraction groove 63. The locking mechanism is connected to the synchronous circular block 56.

[0074] The circular shaft 3 drives the polygonal connector 33 to rotate, the polygonal connector 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.

[0075] The locking mechanism includes a polygonal insert rod 64 slidably installed in a polygonal contraction groove 63. A locking spring 65 is installed between one end of the polygonal insert rod 64 and the innermost end of the polygonal contraction groove 63. A movable groove is opened through one side of the polygonal contraction groove 63. A slider 68 is fixedly connected to the side of the polygonal insert rod 64 near 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. A transmission block 66 is fixedly connected to the end of the polygonal insert rod 64 away from the locking spring 65. Multiple locking blocks 67 are fixedly connected in a ring array on the side of the transmission block 66 away from the polygonal insert rod 64. The locking blocks 67 engage with the locking groove 57.

[0076] A limiting groove 14 is provided at the lower end of the circular tube 12. A driving plate 15 is inserted through the limiting groove 14 from top to bottom. Two sector plates 16 are fixedly sleeved on the driving plate 15. The two sector plates 16 are respectively set on the inner and outer walls of the circular tube 12. The limiting groove 14 is sealed by the sector plates 16. The driving plate 15 is slidably connected to the limiting groove 14. An annular plate is fixedly connected to the upper end of the driving plate 15. The annular plate is sleeved on the cylinder 61.

[0077] When the cylinder 61 rotates, it drives the polygonal insert 64 to rotate. The polygonal insert 64 drives the transmission block 66 to rotate. The transmission block 66 drives the synchronous block 56 to rotate through the locking block 67.

[0078] When the support seat 5 and the filtering mechanism need to be disassembled, the driving plate 15 is pushed to move the annular plate, and after the annular plate contacts the sliding block 68, the driving plate 15 is continuously pushed, at this time the sliding block 68 is pushed to move by the annular plate, the polygonal insertion rod 64 is retracted into the polygonal retraction slot 63 by the sliding block 68, and the polygonal insertion rod 64 extrudes the locking spring 65, and at the same time the polygonal insertion rod 64 drives the clamping block 67 to move through the transmission circular block 66, so that the clamping block 67 is moved out of the clamping slot 57, the locking mechanism is separated from the synchronous circular block 56, and then the support seat 5 and the filtering mechanism can be disassembled from the filter box 13.

[0079] When the support seat 5 and the filtering mechanism are installed, the polygonal insertion rod 64 is first retracted into the polygonal retraction slot 63, so that the clamping block 67 does not hinder the insertion of the support seat 5 into the filter box 13, and when the support seat 5 and the filtering mechanism are installed, the pushing of the driving plate 15 is loosened, and the polygonal insertion rod 64 is slid out of the polygonal retraction slot 63 under the elastic force of the locking spring 65, at this time if the clamping block 67 is aligned with the clamping slot 57, the clamping block 67 is clamped into the clamping slot 57;

[0080] If the clamping block 67 and the clamping slot 57 are not aligned and are offset from each other, the locking mechanism is rotated by the cylindrical shaft 3 at this time, and the clamping block 67 is rotated, and when the clamping block 67 is rotated to be aligned with the clamping slot 57, the clamping block 67 is clamped into the clamping slot 57, and the clamping is completed, and at this time the cylindrical shaft 61 can drive the synchronous circular block 56 to rotate synchronously through the locking mechanism.

[0081] Working principle: when the centrifugal fan works, the airflow enters along the air inlet of the filter box 13, and the airflow flows into the inner cavity of the circular pipe 12 through the circular mounting port of the support seat 5, and flows into the inner cavity of the fan housing 1 along the inner cavity of the circular pipe 12;

[0082] When the airflow passes through the circular mounting port, the impurities in the airflow are filtered by the filter screen 52 arranged, so as to prevent the impurities in the external air from entering the fan, causing damage to the internal parts of the fan.

[0083] The cylindrical shaft 3 is rotated by the output shaft, the cylindrical shaft 3 drives the impeller disc 2 to rotate through the butt joint plate 31, and the impeller disc 2 drives the fan impeller 21 to rotate;

[0084] When the cylindrical shaft 3 rotates, the cylindrical shaft 61 is rotated through the polygonal butt joint 33, the cylindrical shaft 61 drives the locking mechanism to rotate, the locking mechanism drives the synchronous circular 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 as to automatically clean the impurities on the filter screen 52, prevent the impurities from causing the mesh of the filter screen 52 to be blocked, and enable the filter screen 52 to continuously perform the filtering operation.

[0085] When the filter mechanism needs to be replaced or cleaned after long-term use, the driving plate 15 is pushed to move the annular plate to push the slider 68 to move, and the slider 68 drives the polygonal insertion rod 64 to retract into the polygonal retraction slot 63, and at the same time, the polygonal insertion rod 64 drives the clamping block 67 to move out of the clamping slot 57 through the transmission circular block 66, so that the locking mechanism is separated from the synchronous circular block 56, and then the support seat 5 and the filter mechanism can be disassembled from the filter box 13.

[0086] When installing, first make the polygonal insertion rod 64 retract into the polygonal retraction slot 63, and then insert the support seat 5 and the filter mechanism along the replacement slot. At this time, if the clamping block 67 is aligned with the clamping slot 57, the clamping block 67 is clamped into the clamping slot 57;

[0087] If the clamping block 67 is not aligned with the clamping slot 57, they are misaligned with each other. At this time, after the circular shaft 3 rotates, the locking mechanism is driven to rotate through the cylindrical shaft 61. At this time, the clamping block 67 rotates, and when the clamping block 67 rotates to be aligned with the clamping slot 57, the clamping block 67 is clamped into the clamping slot 57, and the clamping is completed.

[0088] In this application, the filter mechanism, the impeller disc 2 and the fan impeller 21 are all detachably installed, and the disassembly and installation are simple and convenient, facilitating the 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.

[0089] When it rains, rainwater drops into the water collecting bucket 8 for collection, and some rainwater flows out downward along the drain port 81. When the amount of rainwater collected in the water collecting bucket 8 is greater than the amount of rainwater drained out through the drain port 81, the water collecting bucket 8 moves downward under the gravity of the rainwater, so as to press the lifting seat 82 to compress the return spring 84. The water collecting bucket 8 drives the L-shaped plate 85 to move downward, and the L-shaped plate 85 pushes the rack plate 72 to move downward, so that the transmission mechanism drives the wind deflector 7 to swing downward, and the multiple wind deflectors 7 slowly approach each other, reducing the gap between the wind deflectors 7. At this time, the wind deflectors 7 are inclined downward, so as to effectively prevent external rainwater from entering the filter box 13 through the gap between the wind deflectors 7.

[0090] When the rain stops, the rainwater in the water collecting bucket 8 will flow out slowly, and the water collecting bucket 8 loses the gravity of the rainwater. At this time, the water collecting bucket 8 moves upward under the elastic force of the return spring 84, and the water collecting bucket 8 drives the L-shaped plate 85 to move upward, so as to release the downward pushing force of the L-shaped plate 85 on the rack plate 72;

[0091] Under the elastic force of the reset elastic sheet 74, the lower pressing plate 73 moves upward, and the lower pressing plate 73 drives the rack plate 72 to move upward, and the rack plate 72 drives the plurality of transmission gears 71 to rotate while moving upward, so that the plurality of air deflectors 7 on the side outside the filter box 13 are swung upward, the plurality of air deflectors 7 are slowly away from each other, the gap between the air deflectors 7 is increased, and the reset of the air deflectors 7 is completed.

[0092] When it rains, raindrops fall on the rain sensor 92, and the rain sensor 92 outputs a voltage signal according to the actual rainfall, and the controller 93 generates a control instruction after receiving the sensing signal, so as to control 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 air deflector 7 to swing downward.

[0093] 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 pushing of the push plate 91.

[0094] Through the setting of the lower pressing mechanism, the rain sensor 92 and the electric push rod 9, the transmission mechanism can stably operate, and when one of them is damaged or fails, the other can continue to drive the transmission mechanism to operate and adjust the air deflector 7, so as to prevent rainwater from entering the filter box 13.

[0095] In actual use, only the lower pressing mechanism can be set, or only the electric push rod 9, the push plate 91, the rain sensor 92 and the controller 93 can be set, or both can be set, according to the needs of the user.

[0096] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An outdoor centrifugal fan with protective components, comprising a fan housing (1), a base (11) fixedly installed at the lower end of the fan housing (1), an impeller disk (2) rotatably installed in the inner cavity of the fan housing (1), and a fan impeller (21) fixedly installed on the outer side of the impeller disk (2). Its features are: A circular shaft (3) is rotatably installed in the inner cavity of the fan housing (1). An impeller disk (2) is sleeved on the circular shaft (3). A circular mounting groove is opened on one side of the fan housing (1). A circular tube (12) is fixedly installed in the circular mounting groove. A filter box (13) is fixedly sleeved at the end of the circular tube (12) away from the fan housing (1). An air inlet is opened on the side of the filter box (13) away from the circular tube (12). A guide plate (7) that can swing up and down is installed at equal intervals from top to bottom in the air inlet. A protective box (17) is fixedly installed on one side of the filter box (13). A transmission mechanism that drives the guide plate (7) to swing up and down is installed in the protective box (17). A pressing mechanism is fixedly installed at the upper end of the filter box (13). The pressing mechanism is used to drive the transmission mechanism. The air guide plate (7) is symmetrically fixedly connected to the two ends of the air guide plate (7). The two ends of each air guide plate (7) are rotatably connected to the two side walls of the filter box (13) through the air guide plate (7). One of the air guide plates (7) has one air guide plate (7) at one end, which extends through the side wall of the filter box (13) 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). On the side of the rack plate (72) with teeth, multiple transmission gears (71) are meshed at equal intervals from top to bottom. Each transmission gear (71) is fixedly sleeved on a rotating shaft. A lower pressure plate (73) is fixedly connected to the lower end of the rack plate (72). A reset elastic plate (74) is installed at the lower end of the lower pressure plate (73). The lower end of the reset elastic plate (74) abuts against the lower end of the inner cavity of the protective box (17). The pressing mechanism includes slide rods (83) fixedly mounted on the upper end of the filter box (13) on both sides. A return spring (84) is sleeved on the slide rod (83). A water collection hopper (8) that can move up and down is provided between the two slide rods (83). Multiple drain outlets (81) are opened at the bottom of the water collection hopper (8). Lifting seats (82) are fixedly mounted symmetrically on the left and right sides of the water collection hopper (8). The two lifting seats (82) are respectively sleeved on the two slide rods (83). The lifting seat (82) is slidably connected to the adjacent slide rod (83) in the upper and lower directions. The upper and lower ends of the return spring (84) abut against the lifting seat (82) and the filter box (13) respectively. The upper end of the slide rod (83) is fixedly sleeved with an anti-detachment ring. An L-shaped plate (85) is fixedly installed on one side of the water collection hopper (8). The lower end of the L-shaped plate (85) penetrates the upper end of the protective box (17) and extends into its inner cavity. The lower end of the L-shaped plate (85) contacts the upper end of the rack plate (72). The protective box (17) has a through slot on its side, and a push plate (91) is slidably installed in the slot. 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). 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 the amount of 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 control commands. The output port of the controller (93) is connected to the electric push rod (9) through a signal line.

2. An outdoor centrifugal fan with protective components according to claim 1, characterized in that: The impeller disk (2) has a circular groove (22) through its side. The inner wall of the circular groove (22) has multiple strip grooves (23) arranged in a ring array. The bottom of one of the strip grooves (23) has a threaded groove (24) through its side. The cylindrical surface of the circular shaft (3) is fixedly connected to multiple docking plates (31) in a ring array. Each docking plate (31) is movably inserted into a strip groove (23). The side of each docking plate (31) has a positioning hole (32) through its side.

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

4. An outdoor centrifugal fan with protective components according to claim 1, characterized in that: The filter box (13) has a replacement slot through the side, and a support seat (5) is slidably inserted into the replacement slot. The support seat (5) has a circular mounting port through the side, and an automatically cleanable filter mechanism is installed in the circular mounting port. The filtration mechanism includes a support frame (51) fixedly installed in a circular mounting port. A filter screen (52) is fixedly installed at one end of the circular mounting port near the air inlet. One side of the filter screen (52) is in contact with the support frame (51). A rotating shaft (53) is rotatably installed on the side of the filter screen (52). A connecting ring is fixedly sleeved at 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) near the filter screen (52). 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). The side of the synchronous circular block (56) is provided with multiple slots (57) 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).

5. An outdoor centrifugal fan with protective components according to claim 4, characterized in that: The rotating shaft (53) is rotatably connected to the support frame (51) and the filter screen (52) respectively. The cleaning cotton (55) slides in contact with the side of the filter screen (52). The connecting ring rotates in contact with the side of the filter screen (52) away from the support frame (51). The synchronizing block (56) rotates in contact with the side of the support frame (51) away from the filter screen (52).

6. An outdoor centrifugal fan with protective components according to claim 4, characterized in that: The rotating mechanism includes a positioning frame (6) fixedly installed in the inner cavity of the round 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). The two limiting rings are symmetrically distributed on both sides of the positioning frame (6). A polygonal docking groove (62) is opened at one end of the cylinder (61) near the round shaft (3). A polygonal connector (33) is fixedly connected at one end of the round shaft (3) near the cylinder (61). The polygonal connector (33) is inserted into the polygonal docking groove (62). A polygonal shrinkage groove (63) is opened at one end of the cylinder (61) away from the synchronous round block (56). A locking mechanism is installed in the polygonal shrinkage groove (63). The locking mechanism is connected to the synchronous round block (56).

7. An outdoor centrifugal fan with protective components according to claim 6, characterized in that: The locking mechanism includes a polygonal insert (64) slidably installed in a polygonal contraction groove (63). A locking spring (65) is installed between one end of the polygonal insert (64) and the innermost end of the polygonal contraction groove (63). A movable groove is opened through one side of the polygonal contraction groove (63). A slider (68) is fixedly connected to the side of the polygonal insert (64) near 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. A transmission block (66) is fixedly connected to the end of the polygonal insert (64) away from the locking spring (65). Multiple locking blocks (67) are fixedly connected in a ring array on the side of the transmission block (66) away from the polygonal insert (64). The locking blocks (67) engage with the locking groove (57). The lower end of the circular tube (12) is provided with a limiting groove (14). 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 set 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). An annular plate is fixedly connected to the upper end of the driving plate (15). The annular plate is sleeved on the cylinder (61).

Images