68results about How to "Realize the commutation function" patented technology

The invention provides a door lock handle reversing device. The device is characterized in that a limiting structure and a torsional spring positioning block are rotated, a torsional spring, a connecting block, a reversing strip, a door handle and other parts are innovatively arranged and interconnected, and the door lock handle can be reversed and positioned through the reversing strip, namely, the door handle can be freely rotated in 360 degrees when the reversing strip is not inserted, and thus the function of reversing the door handle is easily achieved; when the reversing strip is inserted, the door handle is positioned under the effect of an angle limiting block and a bulge b, and meanwhile, the handle is downwards pressed and upwards lifted. With the adoption of the integral structure design, the device has the advantages of being convenient to mount and reverse, small in space used, and easy and safe to be operated.

The invention provides a heat pump unit control method and device, a storage medium and a heat pump unit. The heat pump unit control method comprises the following steps of judgment step and executingthe step, wherein the judgment step is used for judging whether the four-way valve is electrified or not in the heating mode; the executing the step and is used for judging whether the four-way valvereversing is abnormal or not in the judgment step, and a first operation is executed; the first operation comprises the steps that the four-way valve is powered down, the frequency of the compressoris executed to be increased to a preset frequency, the operation of the indoor outer fan or the indoor water pump is stopped and the opening degree of the throttling device is adjusted to at least oneof a preset opening degree. According to the heat pump unit control method and device, the voltage difference of the four-way valve can be improved in a short time, the normal reversing function of the four-way valve can be realized fast and effectively.

The invention provides a wheel adjusting device and a four-direction carrying vehicle, and relates to the technical field of conveying equipment in warehouse logistics systems. The technical problem that when the carrying vehicle turns between a cargo loading and unloading tunnel and a storage rack tunnel mutually, due to mutual transformation of a lifting wheel and a fixing wheel, a square chassis and cargos arranged in the square chassis need to be moved up and down, and therefore larger driving force is needed for the carrying vehicle is solved. The wheel adjusting device comprises a guideplate and a height driving mechanism, the guide plate is installed on the inner side of a side plate of the four-direction carrying vehicle and fixedly connected with the side plate, the outer side ofthe side plate is provided with a wheel assembly and fixedly connected with the wheel assembly, and the four-direction carrying vehicle comprises the wheel adjusting device. The wheel assembly is independently driven to ascend and descend, overall up-down movement of the square chassis is not caused, the burden on the driving mechanism is reduced, and the production and operation cost is reduced.

The invention discloses a single valve core rotation type hydraulic valve driven by a single motor and relates to the technical field of fluid transmission and control technologies. The single valve core rotation type hydraulic valve driven by the single motor is used to solve the problems that a single valve core hydraulic valve in the prior art cannot have multiple functions and is complex in structure and poor in reliability. The hydraulic valve comprises an angular displacement sensor, a motor, a valve body, a valve core, a pressure sensor, a spring collar, a pressing cover and a controller. The motor rotates to drive the valve core to rotate, the valve core rotates to enable a first through hole to be communicated with an oil return T through hole, or a U-shaped groove is communicated with a working B through hole and a pressure P through hole, or a second through hole is communicated with a working A through hole. The controller obtains angle information through the angular displacement sensor 101 or obtains pressure information through the pressure sensor, and thus functions of a reversing valve and functions of a pressure valve can be achieved.

The invention discloses a rotary reversing valve comprising a valve body, a valve core, two end covers and a connecting shaft. The valve core is arranged in the valve body, a main oil inlet P, work oil ports and a main oil outlet T are formed in the side wall of the valve body, and at least two oil inlet passages communicating with the corresponding work oil ports and the main oil inlet P and at least two oil outlet passages communicating with the corresponding work oil ports and the main oil outlet T are formed in the valve core. The connecting shaft is connected with the valve core to drive the valve core to rotate in the valve body so as to control communicating and reversing of an oil way, and the positions, corresponding to the main oil inlet P and the main oil outlet T, of the valve core are each provided with an annular groove. The oil inlet passages and the oil outlet passages are each in a right-angled-U shape on the longitudinal section of the valve core and communicate with the corresponding annular grooves and the corresponding work oil ports correspondingly. The oil inlet passages are arranged in an annular array mode on the cross section of the valve core, the oil outlet passages are arranged in an annular array mode on the cross section of the valve core, and the oil inlet passages and the oil outlet passages are arranged in an alternated mode in sequence on the cross section of the valve core. The rotary reversing valve is balanced in radial force and low in cost and belongs to intra-valve-body reversing.

The invention relates to the field of transportation equipment, and discloses a jacking and walking co-driving type carrying device. The jacking and walking co-driving type carrying device comprises amain frame body, a lifting frame body, a first transmission shaft, a first rotating wheel, a first driven transmission shaft, a first driven rotating wheel, a driving device, a power output shaft, afirst transmission mechanism and a lifting transmission mechanism, wherein the first transmission shaft provided with the first rotating wheel is arranged on the main frame body, and the first driventransmission shaft provided with the first driven rotating wheel is also arranged on the main frame body; the driving device fixed on the main frame body drives the first transmission shaft to rotatethrough the power output shaft and the first transmission mechanism; and the driving device can drive the lifting frame body to ascend or descend through the lifting transmission mechanism. The poweroutput shaft is not parallel to the first transmission shaft, and the angle can be adjusted by adjusting the tooth ratio of a first bevel gear and a second bevel gear of the first transmission mechanism. According to the carrying device, the jacking and moving functions of the device can be realized only by one driving device.

The invention relates to the technical field of valves and particularly discloses a disk type reversible stop valve. The disk type reversible stop valve comprises a valve body, a valve clack, a valverod, a valve deck and an operating mechanism; the lower end of the valve rod is provided with a steering disk, and the upper end of the valve clack is arranged in the steering disk; the upper end of the valve clack is provided with an elastic element, and the bottom surface of the valve clack and the bottom surface of a valve cavity are in sealed cooperation; the valve rod is driven by the operating mechanism to drive the steering disk to rotate; and the steering disk then drives the valve clack to rotate to achieve communicating or partitioning of the valve cavity and a medium flow-out channel. The stop valve is novel in structure, compact and reasonable in arrangement, fast to be turned on or off, and flexible to operate; a rotating disk is added between the valve rod and the valve clack, the elastic element is arranged between the steering disk and the valve clack, so that the valve clack is attached to the sealing face of the valve cavity all the time, and the valve clack achievesthe functions of self grinding and polishing; and particle media at the sealing face position can be removed, the sealing face is effectively protected, the problem that the sealing face is easily damaged in a pressing manner is effectively solved, and meanwhile a reversing function can also be achieved.

The invention discloses a multifunctional handle operating control system for a loader. The multifunctional handle operating control system for the loader comprises a complete machine control unit, a remote information control centre, an engine control unit, a gearbox control unit, a multifunctional handle, a multi-channel proportional solenoid valve, a displayer, two pressure sensors, two angle sensors and a gear selector handle, wherein the remote information control centre, the engine control unit, the gearbox control unit, the multifunctional handle, the multi-channel proportional solenoid valve, the displayer, the two pressure sensors and the two angle sensors are connected with the complete machine control unit respectively; the two pressure sensors and the two angle sensors are installed on a work device; the gear selector handle is connected with the gearbox control unit; a three-way switch with the direction gear function, a self-reset three-way switch with the shifting-up and shifting-down functions, a KD button with the KD gear function, a pattern memory button, a three-way switch with the bucket lifting and falling functions and a three-way switch with the bucket unloading and taking-back functions are integrated on the multifunctional handle. The operation procedures are simplified, the memory pattern of the work device is achieved, and real-time monitoring of the complete machine operation conditions and establishment of a database are facilitated.

The invention discloses an electric infiltration phenomenon-based reversible micro-pump. The electric infiltration phenomenon-based reversible micro-pump comprises an annular pump cavity and a liquidchannel formed in the annular pump cavity; mesh holes are formed between the annular pump cavity and the liquid channel; the liquid channel comprises a first pump port and a second pump port, an electric infiltration power mechanism is arranged in the annular pump cavity, and the electric infiltration power mechanism comprises an electric infiltration liquid held in the annular pump cavity, an electrode array ring nested on the side wall of the annular pump cavity, and a dielectric hydrophobic material ring nested on the outer surface of the electrode array ring; a liquid replacing structure is arranged on the annular pump cavity; and the electric infiltration liquid and the pumped liquid are mutually insoluble. The micro-pump does not have a mechanical structure, is simple in design, andcan avoid mechanical wear produced in the using process of the micro-pump, so that the service life of the micro-pump is prolonged; and in addition, the micro-pump can control the pumping direction ofa fluid, and directional flowing of the pumped solution can be realized at both micro level and macro level.

The invention relates to the field of air conditioner accessories, in particular to an electric commutator. The electric commutator comprises a valve body, a valve element and a driving motor, wherein the valve element is rotationally arranged in the valve body; the driving motor is arranged outside the valve body, is fixedly connected with the valve element and can drive the valve element to rotate; a first vent hole, a second vent hole, a third vent hole and a fourth vent hole which are communicated with an inner wall respectively are formed in an outer wall of the valve body; the first vent hole is coaxial with the third vent hole; the second vent hole is coaxial with the fourth vent hole; the axis of the first vent hole is perpendicular to that of the second vent hole; the valve element is hermetically connected with the valve body; a first communication hole and a second communication hole are formed in the valve element; two ends of the first communication hole are communicated with the first vent hole and the second vent hole respectively; two ends of the second communication hole are communicated with the third vent hole and the fourth vent hole respectively. The electric commutator is simple in structure, easy to manufacture and convenient to operate, the sealing property and the electricity saving performance are improved, and meanwhile, the manufacturing cost and the using cost are reduced.

The invention relates to the technical field of child safety seats and discloses a child safety seat provided with a reversing device and an ISOFIX connector. The child safety seat comprises a base and an upper seat body, wherein the base is provided with the reversing device. The reversing device comprises a rotating mechanism, a rotating connection rod and an ISOFIX connection rod provided with the ISOFIX connector. The rotating mechanism is arranged on the base, the rotating connection rod is arranged on the rotating mechanism, and the ISOFIX connection rod is arranged at the end, away from the rotating mechanism, of the rotating connection rod. When the child safety seat is mounted in a reverse mode, a rotating piece composed of the rotating connection rod and the ISOFIX connection rod is rotated around a rotating structure so that mutual connection between the base and the ISOFIX on the automobile seat can be achieved, so that the whole child safety seat is effectively fixed, the whole reversing device is simpler in structure, and the cost is relatively lower.

The invention relates to a two-position three-way rotating disc type reversing valve, and belongs to the field of hydraulic transmission. A main structure comprises an upper valve body, a valve disc and a lower valve body, wherein the upper valve body and the lower valve body are connected into a whole by bolts and nuts and are fixed to a base; the valve disc is installed in a cavity formed by the upper valve body and the lower valve body, and a driving shaft of the valve disc extends from the upper valve body so as to drive the valve disc to rotate by virtue of external power; an oil port B and an oil port C are formed in the upper valve body, and an oil port A is formed in the lower valve body; when the valve disc rotates, the oil port A communicates with the oil port B in the first half cycle, and the oil port A communicates with the oil port C in the second half cycle; and the valve disc continuously rotates, so that a two-position three-way operating mode of the reversing valve is realized. According to the two-position three-way rotating disc type reversing valve, the operating mode of a traditional two-position three-way electromagnetic directional valve which is reversed by reciprocating movement of a valve core is broken, the two-position three-way rotating disc type reversing valve has the characteristics of compact structure, easiness in processing, stability in operation, low noise and the like, and application requirements and industrial prospects are wide.

The invention provides an intelligent elevator capable of driving a plurality of lift cars to move circularly by utilizing gears. The intelligent elevator comprises lift cars, guide rails, a shaft, a synchronous motor set, a gear set, a lift car driving mechanism, a lift car reversing driving mechanism and a lift car storage region, wherein a supporting framework is arranged in the middle of the shaft and is used for bearing the synchronous motor set, the gear set, the lift car driving mechanism and the like; the inner part of the shaft is divided into a lift car ascending region, a lift car descending region, a top reversing region and a bottom reversing region; the intelligent elevator is characterized in that the lift cars further comprises a reversing lift car; a hook and an unhooking mechanism are arranged between the lift cars and the lift car driving mechanism; and the intelligent elevator is further provided with a central controller, and a first position sensor, a second position sensor, a lift car door control device, a delaying relay and the like. According to the intelligent elevator provided by the invention, a product combines software and hardware and the operation time and retention time of the elevator can be strictly controlled so that the utilization rate of the elevator is greatly improved.

The invention discloses a split torque transmission speed reduction device for a helicopter. Each engine input shaft is connected with a power input shaft through an overrunning clutch; a straight toothed spur gear on each power input shaft is engaged with two face gears installed in the opposite directions to achieve the power shunting, first-stage speed reduction and the reversing functions. The face gears are connected with the corresponding straight toothed spur gears through corresponding duplicate gear shafts and transmit power uniformly to the four straight toothed spur gears to achieve the second torque split and second-stage speed reduction functions. Power is transmitted to four herringbone toothed spur gears by the four straight toothed spur gears through the four duplicate gear shafts, and the four herringbone toothed spur gears are engaged with a fifth herringbone toothed spur gear correspondingly to achieve the second-stage speed reduction and parallel operation functions. The split torque transmission speed reduction device adopts multistage gear transmission, and is high in transmission ratio and low in vibration noise. Power is shunted through multiple branches. Torque transmitted by the gears in all the branches is reduced. The bearing capacity of the gears is improved. The fatigue life of the gears is prolonged. Accordingly, a transmission system has higher survivability.

The invention discloses a steering reducing infinitely variable speed mechanism with double intermediate rollers. The mechanism comprises an input shaft, an intermediate shaft, a master pin, a first intermediate roller, a second intermediate roller and an output shaft, and a pair of intermediate rollers with viscoelastic behavior is adopted as the first intermediate roller and the second intermediate roller. The intermediate rollers are enabled to deviate laterally to change radial positions thereof under the action of lateral force so as to regulate the speed ratio. The mechanism has the advantages that contact radius of a high-friction-coefficient driving wheel is controlled to be changed smoothly and continuously under the conditions of low resistance and low wear, the structure is simple, infinitely variable speed control is simplified, and bearing capacity of a frictional infinitely variable transmission is improved.

The invention discloses a steering device for a conveying mechanism and a working mode. The steering device comprises a cross-shaped reversing mechanism, a light sensor and a controller, the light sensor is arranged on the cross-shaped reversing mechanism, the cross-shaped reversing mechanism comprises a pushing module, a rotating module and a power module, the steering device is high in intelligent degree, the posture of goods can be automatically recognized, the posture of the goods is automatically adjusted, the goods are automatically arranged, the conveying efficiency can reach 1.5 seconds per piece, and the efficiency is high. The steering mechanism can rapidly achieve the reversing function, and long-distance reversing transition is not needed. The steering device is low in energy consumption, less in weight, miniature, simple and easy to assemble.

The invention relates to a rotary multi-way valve with pressure maintaining and shock preventing functions, and belongs to the technical field of fluid reversing valves. The technical problems that for an existing valve, a pressure maintaining function can not be achieved, operation is tedious, and misoperation is liable to be caused are solved. According to the technical scheme, the rotary multi-way valve with the pressure maintaining and shock preventing functions comprises a valve body, a valve element, a front end cover, a back end cover and a safety valve assembly and further comprises a valve element positioning sheet, a reset spring, a fastening screw and a spring base; a valve element hole is formed in the center of the valve body, a P-cavity annular groove is formed in the middle of the valve element hole, a T-cavity annular groove is formed in the end, close to the back end cover, of the valve element hole, the P-cavity annular groove communicates with an oil inlet, and the T-cavity annular groove communicates with an oil return inlet; the valve element is arranged in the valve element hole and can rotate around the axis of the valve element and axially move; two groups of inclined fluid working channels and two groups of parallel vertical fluid working channels are formed in the axial cross section of the valve body.

The invention discloses a reversing mechanism of an anchor chain and a mooring chain. The reversing mechanism comprises a base and a disk structure arranged on the base. The reversing mechanism further comprises a center plate, a tapered roller bearing I, a round nut, a bearing sleeve, a shaft, a tapered roller bearing II, a shaft sleeve II, a sealing ring, a baffle I and a baffle II. The base comprises adjusting screws, adjusting nuts, a fixing plate I, two fixing plates II and two fixing plates III. The disk structure comprises a base disk, a top disk, a bearing end cap, a shaft sleeve I, hanging rings, a cover plate and a screw. The reversing mechanism of the anchor chain and the mooring chain are simple in structure, reliable in performance, low in cost, stable in working operation, long in service life and convenient to install and maintain.

The invention discloses an injection mold for a motor wind wheel. The injection mold comprises an outer box, a box cover and an injection molding port, wherein the injection molding port is connectedwith an injection molding cavity in a sealing mode, a mold cavity is formed in the outer box, a mold cavity sleeve is connected to the outer side of the mold cavity in a sealing mode, the outer box isprovided with a cooling cavity located at the outer side of the mold cavity sleeve, a cooling sleeve is connected to the outer side of the cooling cavity in a sealing mode, magnetizing liquid is contained in the cooling sleeve, a permanent magnet is fixedly connected to the outer portion of the bottom of the cooling sleeve, and the mold cavity sleeve and the cooling sleeve are jointly connected with a transmission structure. The injection mold has the advantages that according to a magnetothermal effect, an injection molding product is cooled through the demagnetization heat absorption actionof a ferromagnetic substance in the injection molding process, and the effect of uniform forming is achieved through the mold cavity sleeve and the cooling sleeve which rotate in opposite directions,so that injection molding quality is improved, and the injection mold is convenient to use.

The invention provides a bidirectional electromagnetic valve which comprises a main valve body, a protective shell and a transmission mechanism. The main valve body and the transmission mechanism aresequentially arranged in the protective shell. The main valve body comprises a valve cavity and an outer shell. A first sliding block and a second sliding block are movably installed in the valve cavity. A first movable iron core is fixedly connected to the outer surface of one side of the first sliding block. According to the bidirectional electromagnetic valve, the protective shell is additionally arranged outside the main valve body, deforming or fracturing of the main valve body can be effectively prevented, and the outer shell is prevented from rusting. The transmission mechanism drives the first sliding block and the second sliding block to move, and thus the situation that due to insufficient pushing force of electromagnetic force, the first sliding block and the second sliding block move slowly or get stuck in the valve cavity is avoided. When the electromagnetic valve is powered off or other circuits break down, by rotating a handle, the function of manually controlling reversing of the electromagnetic valve can be achieved, and as no connecting part is between the first sliding block and the second sliding block, the speed of fluid flowing is increased.

The invention relates to a semi-automatic fire fighting truck. The semi-automatic fire fighting truck comprises a housing, a partition, a water guide tube arranged at the rear upper side of the housing, a supporting frame and a semi-automatic transmission fire fighting system, wherein the partition is used for dividing the housing into a transmission region and a water storage region; a water turbine and an outlet of the water guide tube are positioned in the water storage region of the housing; an outlet of the water guide tube faces towards the water turbine; the water turbine of the semi-automatic transmission fire fighting system is positioned in the water storage region of the housing, and the rest parts are positioned in the transmission region of the housing; the water turbine is transversely arranged between the first supporting frame and the second supporting frame; the semi-automatic transmission fire fighting system is connected with a self-priming pump through a transmission shaft; the self-priming pump is positioned in front inside the housing; the self-priming pump sleeves a transmission shaft; a crank is rotatably connected with a long rod which is vertically arranged; and the top end of the long rod is connected with a floating ball. The semi-automatic fire fighting truck adopts a mechanical structure to replace a fireman to get close to a fire scene to a greater extent; and a transmission device is engaged through a gear, so that the semi-automatic fire fighting truck is more reliable and stable.

The invention relates to a pneumatically-controlled reversal valve capable of achieving automatic air pressure compensation. The pneumatically-controlled reversal valve comprises a valve body, a valve base, a valve rod and a spring; the spring and the valve rod are sequentially inserted into the valve body, the two ends of the spring are connected with the inner wall of the valve body and the valve rod respectively, the valve base is connected with the opening end of the valve body, the valve body is provided with an air inlet, a first working port, a second working port and two exhaust ports, and the valve base is provided with a control port. The pneumatically-controlled reversal valve further comprises a one-way assembly, the one-way assembly is connected with a valve base groove of the valve base in an assembling mode, and the valve base groove is connected with the second working port through a valve body channel and connected with the control port through a valve base channel; the one-way assembly comprises a valve element and a Y-shaped ring, wherein the valve element is a T-shaped annular cylinder, the annular cylinder of the valve element is provided with a convex radial support ring, the Y-shaped ring is a hollow ring-shaped body and is connected with the valve element in a sleeving mode, and one support pin of the Y-shaped ring is connected with the support ring. According to the pneumatically-controlled reversal valve, the structure is simple and compact, the failure rate is decreased, self compensation of the air pressure can be achieved, and the service life is longer.

The invention discloses a reversing mechanism. The reversing mechanism comprises a fixing piece, an input wheel, a first end transmission structure, a second end transmission structure, a driving wheel, a driven wheel, a moving piece, a cam, a shifting rod and a mounting wheel, the input wheel is fixedly connected with the driven wheel, the driving wheel and the driven wheel are rotationally arranged on the moving piece, the first end transmission structure is in meshed transmission with the driving wheel, the second end transmission structure is in meshed transmission with the driven wheel, the first end transmission structure and the second end transmission structure are rotationally arranged at the two ends of the moving piece correspondingly, the cam and the mounting wheel are rotationally arranged on the fixing piece, the shifting rod is arranged on the cam, the shifting rod pushes the moving piece to move up and down, so that the first end transmission structure or the second endtransmission structure is in meshed transmission with the mounting wheel. During working, external power drives the input wheel to rotate to enable the driving wheel and the driven wheel to rotate, and the shifting rod pushes the moving piece to move up and down to enable the first end transmission structure or the second end transmission structure to be in meshed transmission with the mounting wheel, so that the reversing function is realized.

The invention discloses a reversing mechanism of a rice precision hill-drop planter and the rice precision hill-drop planter. The reversing mechanism of the rice precision hill-drop planter comprises a connecting mechanism for connecting a seed feeding setting mechanism and two groups of conveying mechanisms; the connecting mechanism is provided with two output ports which are communicate with the conveying mechanisms respectively; the two groups of conveying mechanisms are conveying belts for horizontal conveying; a plurality of seed storage boxes are arranged on the outer surfaces of the conveying belts side by side in the length direction of the conveying belts; the output ports communicate with the seed storage boxes; the connecting mechanism is provided with a mounting shaft; a connecting piece arranged outside the connecting mechanism in a sleeving mode is fixed to the mounting shaft; a blocking piece is rotationally connected to the position, located in the connecting mechanism, of the mounting shaft; and the conveying mechanism is provided with a first matching structure and a second matching structure which can enable the blocking piece to periodically rotate and close one of the output ports. The reversing mechanism has the beneficial effects that a mechanical structure mode is adopted to replace electric control, so that control is more reliable, and the rice yield is effectively improved.

The present invention relates to a flexible hinge-based displacement reversing and enlarging mechanism. The mechanism comprises a left rigid body, a right rigid body and a flexible portion; the left rigid body and the right rigid body are symmetrically disposed relative to a y-axis; the flexible portion is connected between the left rigid body and the right rigid body; the flexible portion is symmetrically arranged relative to the y-axis; the flexible portion comprises a left triangle enlarging area, a right triangle enlarging area, a top triangle enlarging area, a left lever enlarging area and a right lever enlarging area; the two bottom ends of the top triangular enlarging area are respectively connected with the two top ends of the left triangle enlarging area and the right triangle enlarging area; the two bottom ends of the left triangular enlarging area are respectively connected with the upper end of the left rigid body and the output end of the left lever enlarging area; and thetwo bottom ends of the right triangular enlarging area are respectively connected with the upper end of the right rigid body and the output end of the right lever enlarging area. According to the flexible hinge-based displacement reversing and enlarging mechanism of the invention, the structural performance advantages of the flexible hinge-based triangle enlarging principle and the lever enlarging principle are integrated; and the reversing and enlargement function of input displacement is realized. The mechanism has the advantages of compact structure, stable motion, high precision and the like.

The invention belongs to the technical field of electric power saving, especially a new energy electric power saving device, aiming at carrying more fine particles in the flue gas discharged from thermal power plants and chemical plants, floating everywhere under the action of external wind force, polluting the air and causing people The technical problem that threatens the healthy life of people, the following scheme is proposed now, including the wind drive mechanism and the bellows. The liquid tank and the serpentine tube for throwing medicine are fixedly attached to the rotating blades. The present invention realizes power generation and storage of electric energy through the power generation and storage integrated box when the wind blows through the provided liquid medicine tank, rotating blades and serpentine pipe; It is thrown out and combined with the pollution particles in the air to increase the weight of the pollution particles and make them fall to the ground, thereby achieving the effect of reducing air pollution.