132results about How to "Improve the winding effect" patented technology

The winding device for mutual inductor production comprises a base and a mounting frame arranged on one side of the upper end face of the base, a wire storage ring is arranged on one side of the mounting frame in a penetrating mode, a groove is formed in the upper end face of the base, a feeding table is movably arranged on the upper end face of the base, and a clamping mechanism used for positioning a rectangular iron core is arranged on the upper end face of the feeding table. A rotating mechanism used for driving the iron core to rotate and wind is arranged on one side in the base, a driving mechanism used for driving the wire storage ring and the feeding table is arranged in the mounting frame and the base, and a controller is further arranged on the upper end face of the base. The device is simple in structure and reasonable in design, achieves the effect of vertically and uniformly winding the enameled wire on the round corner of the rectangular iron core, avoids winding inclination, reduces the winding amount of the enameled wire, saves the production cost, and also improves the electrical performance of the mutual inductor and the stability and reliability in the later application process.

The utility model discloses a winding machine for a horizontal inductor, which belongs to the technical field of winding machines and comprises a base. According to the utility model, a group of tension adjusting mechanism consisting of the electric push rod, the telescopic column, the spring, the adjusting roller and the film type pressure sensor is designed, and the electric push rod pushes the adjusting roller to move to adjust the height of the adjusting roller at the beginning of winding, so that a copper wire has certain tension; due to the fact that the movement of the guide ring can lead to the change of the winding distance and further lead the tension to change, the telescopic column and the spring are combined to enable the adjusting roller to have a certain lifting space and further enable the adjusting roller to adapt to the change, and the tension is guaranteed to be in a dynamic balance. And meanwhile, the film type pressure sensor detects the pressure of the copper wire and the adjusting roller in real time, when the detected numerical value changes greatly, the control panel controls the electric push rod to act for active adjustment, the adjusting efficiency is high, the response speed is high, and the winding effect of the device is improved.

The utility model discloses an automatic winding device for a transformer, and relates to the technical field of transformers, the automatic winding device comprises a base, a wire winding device is fixedly mounted on the left side of the top of the base, and the automatic winding device is characterized in that a winding mechanism is arranged on the right side of the top of the base and used for winding the transformer; the bracket is fixedly mounted on the right side of the top of the base; and the wire arranging assembly is arranged at the top of the winding assembly and comprises a supporting frame fixedly installed at the top of the support, an installation bin is fixedly installed at the top of the supporting frame, two limiting columns are fixedly installed in the installation bin, and the wire arranging assembly is arranged, a second motor rotates to drive a threaded column to rotate, and meanwhile a moving block is driven to move front and back. And the copper wire penetrates through the circular rings at the tops of the wire arranging ring and the auxiliary wire ring, and when the moving block moves back and forth, the copper wire is uniformly and orderly arranged on the surface of the raw material coil, so that the wire arrangement is orderly, and the winding effect is improved.

The invention provides a ventilation wall air conditioner indoor unit and a ventilation wall air conditioner, the ventilation wall air conditioner indoor unit comprises a first ventilation wall module, the first ventilation wall module comprises a plurality of first cold air cavities arranged side by side, and a first fan assembly is arranged in each first cold air cavity; the upper portion of the first cold air cavity located in the middle is covered with a door plate, a display screen module is embedded in the door plate, a weak electric control box and a strong electric control box are sequentially arranged in the first cold air cavity on the inner side of the door plate from outside to inside, a weak electric component is arranged in the weak electric control box, and a strong electric component is arranged in the strong electric control box. According to the ventilation wall air conditioner indoor unit and the ventilation wall air conditioner, the internal assemblies are reasonable in layout, the air outlet effect of the ventilation wall device is effectively improved, and use operation and maintenance of a user are facilitated.

The invention relates to the technical field of iron core winding equipment, and provides a winding machine which comprises a rack, a mounting shaft, a die head assembly, a winding assembly, a wire guide assembly and a winding translation driving device. The die head assembly comprises a die head seat fixed on the mounting shaft, a positioning seat which is fixed on the die head seat and is used for abutting against a tooth part of an iron core to be wound by a wire, and a moving seat which is movably arranged on the die head seat along the axial direction of the mounting shaft; the wire assembly comprises an upper wire support lug and a lower wire support lug which are used for guiding an enameled wire to the tooth part; the upper wire support lug and the lower wire support lug are respectively arranged on the moving seat and are spaced in the direction vertical to the bottom surface of the rack; and the winding translation driving device is used for enabling the moving seat to move in the axial direction of the mounting shaft. Compared with the prior art, the winding machine has the advantages of being good in winding effect, large in coil density after iron core winding and strong in magnetic field.

The utility model relates to the technical field of aluminum plate strip rolling, and discloses an aluminum plate strip rolling anti-deviation device which comprises a bottom plate, the opposite outer surfaces of a vertical plate and an L-shaped plate are rotationally connected with a positive and negative screw rod, the outer surface of the positive and negative screw rod is fixedly connected with a crank, the outer surfaces of the bottoms of two threaded blocks are rotationally connected with limiting cylinders, and the limiting cylinders are fixedly connected with the crank. An infrared transmitting end and an infrared receiving end are installed on the outer surface of the L-shaped rod, two first audible and visual alarms are fixedly installed on the outer surface of the top of the L-shaped rod, and a controller is installed on the outer surface of the top of the bottom plate. According to the aluminum plate strip winding anti-deviation device, the positive and negative screw rod, the threaded block and the limiting barrel are arranged and matched with a crank, an aluminum plate strip can be prevented from deviating during winding, an infrared transmitting end, an infrared receiving end and a first audible and visual alarm are arranged and matched with a controller, a worker can be reminded in time after the aluminum plate strip deviates, and the aluminum plate strip is prevented from deviating. And the rolling of the aluminum plate strip can be adjusted in time.

The application relates to the air conditioning technical field and discloses an indoor unit and an air conditioner. The indoor unit comprises a shell, an air duct formed in the shell, an air inlet and an air outlet, and the air duct is communicated between the air inlet and the air outlet; a heat exchanger located in the air duct; a cross-flow fan located in the air duct, the cross-flow fan comprising a motor; wherein a side wall of the air duct is provided with an exhaust passage communicated with the air duct, the shell is further provided with a heat dissipation passage, the heat dissipation passage is located outside the air duct and is communicated between the exhaust passage and the motor, and airflow in the air duct can flow to the motor through the exhaust passage and the heat dissipation passage. The airflow in the air duct has certain kinetic energy and temperature regulation, thereby providing continuous cooling effect for the motor, so that the heat dissipation efficiency of the motor is remarkably improved, and the service life of the motor is prolonged.

The present invention relates to the technical field of steel strip production, and specifically discloses a copper-plated steel strip winding device, comprising a frame, on which a winding mechanism, a clamping mechanism and a supporting mechanism are arranged, the winding mechanism comprising a winding roller and a driving component, the clamping mechanism comprising two groups of clamping components, each group of clamping components comprising a clamping roller, and an elastic member is arranged between the clamping roller and the frame, so that the side wall of the clamping roller is kept in contact with the steel strip, the supporting mechanism comprising a supporting plate, a plurality of supporting blocks and a driving structure 2, each supporting block is in an arc shape, and slides with the supporting plate in the longitudinal direction, and a plurality of supporting blocks are distributed on the supporting plate in a spiral shape at intervals; during the winding process, the present invention can press the steel strip by the clamping roller, so that the wound steel strip is more compact and uniform, thereby improving the winding effect, and at the same time can support the steel strip by the successive upward movement of the plurality of supporting blocks, thereby preventing the wound steel strip from partially collapsing downward and affecting the winding effect.

The utility model relates to an anti-scattering mechanism for a cotton yarn winding device, which comprises mounting racks and an anti-scattering assembly, a winding drum is rotatably connected between the two mounting racks, the winding drum is used for winding cotton yarn, and one end of the winding drum is fixedly connected with a driven wheel; according to the anti-scattering mechanism for the cotton yarn winding device, a supporting spring and an attaching plate are arranged on an anti-scattering assembly, so that the attaching plate can be always attached to cotton yarn in the process that the cotton yarn is wound by a winding drum; and in the using process, the situation that cotton yarn is scattered in the process that the cotton yarn is wound by the winding drum can be effectively prevented. And by arranging a first electric push rod, the effect of adjusting the height of the winding drum can be achieved in the using process, so that the winding capacity of the winding drum can be effectively improved, and the effect of winding more cotton yarns can be achieved in the using process.

The utility model discloses a fabric collecting device of anti -loose function, include: fabric collecting structure, fabric collecting structure includes baseplate. The utility model is equipped with the clamping block, the clamping groove, the fixed plate and the slope, and the clamping block is positioned to the fixed plate with the clamping groove clamping, and the fixed plate is pressed fixed to prevent the fabric loose at the tail end of winding good fabric top, and the slope is tangent with the limiting disc can make the fixed plate installation positioning more labor saving, this step, fabric winding position is firm, and the anti -loose effect is good, and the transportation storage is convenient, based on above-mentioned beneficial effect, is equipped with guide roller, electric push rod, pivot, sliding block and spring no.

The coil winding mechanism comprises a bottom plate, first vertical plates are symmetrically and fixedly installed on one side of the upper end face of the bottom plate, a guide assembly is installed between the two first vertical plates, and a second vertical plate is fixedly installed on one side of the upper end face of the bottom plate. The output end of the first driving motor penetrates to one side of the second vertical plate through a bearing and is fixedly provided with a clamping block, and an installation assembly is installed in the clamping block. A clamping groove in one side of a coil body is inserted into the outer surface of a clamping block, then a driving motor is started to drive a driving bevel gear to rotate, the driving bevel gear drives a driven bevel gear to rotate, and the driven bevel gear drives a square block at one end of a rotating rod to rotate; and when the square block rotates, the four inserting blocks are driven to be inserted into the corresponding inserting grooves through mutual cooperation of the L-shaped connecting rods, the inserting blocks and the telescopic rods, so that the coil body is rapidly installed and fixed, and the applicability is high.

Wrapped insulated wires and coils that can increase or make equal insulation breakdown voltage even when the insulation coating thickness is the same, or can increase or make equal insulation breakdown voltage even when the insulation coating thickness is reduced to make the insulated wire diameter smaller. The insulated wire (10) has a conductor (1) and an insulating cover (2) provided on the outer periphery of the conductor (1). The insulating cover (2) is composed of multiple insulating layers (2a, 2b, 2c, 2d, 2e) formed by overlapping and winding 2 to 5 insulating strips (11, 12, 13, 14, 15). In this insulated wire (10), the insulating cover (2) is configured such that: (1) when there are a total of 2 or 3 insulating layers formed by overlapping and winding the insulating strips, the total number of windings of each insulating layer is less than or equal to the total number of integer parts of the number of windings of each insulating layer plus 1; or (2) when there are a total of 4 or 5 insulating layers formed by overlapping and winding the insulating strips, the total number of windings of each insulating layer is less than or equal to the total number of integer parts of the number of windings of each insulating layer plus 2. By configuring it in this way, the above-mentioned problem is solved.

The invention relates to the technical field of air conditioning, and discloses an air purification device and an air conditioner. The air purification device comprises a shell defining a containing cavity with an air inlet and an air outlet, and the air outlet is located in the top of the containing cavity; the purification device is arranged in the accommodating cavity; the fan is movably located at the air outlet, and the fan is provided with a fan air inlet and a fan air outlet; wherein the fan can move between a first position and a second position relative to the air outlet, when the fan moves to the first position, the fan air inlet is communicated with the air outlet, and the fan drives airflow of the air inlet to flow through the purification device and the fan and then flow out of the fan air outlet; when the fan moves to the second position, the fan air inlet and the fan air outlet are staggered, and the fan drives external airflow to enter the fan air inlet and then flow out of the fan air outlet. Therefore, when the air purification device operates in a fan mode, external airflow can directly flow into the fan air inlet, the air inlet resistance is reduced, and the air outlet effect of the fan is improved.

The utility model provides an automobile door structure and an automobile thereof, and relates to the technical field of automobile safety accessories. The vehicle door structure comprises a vehicle door inner plate, a mounting reinforcing plate and a safety belt assembly, the vehicle door inner plate is connected to the mounting reinforcing plate, and the safety belt assembly comprises a belt body, a retractor and a mounting piece; the winder is used for winding the belt body and located on the side, away from the installation reinforcing plate, of the automobile door inner plate, and the installation part is used for fixing the winder, the automobile door inner plate and the installation reinforcing plate together; according to the automobile door structure and the automobile with the automobile door structure, the fixing strength of the retractor fixed to the automobile door inner plate is improved.

The utility model relates to the technical field of steel belt slitting processing, in particular to a steel belt slitting waste collecting device which comprises a bottom plate and an arranging device, a servo motor is fixedly connected to the upper surface of the bottom plate, a box is fixedly connected to the upper surface of the bottom plate, a recycling barrel is fixedly connected to one end of the box, and a wire inlet is formed in the surface of the recycling barrel. The driving end of the servo motor penetrates through the box and the recycling barrel and is fixedly connected with a rolling rod, the arranging device is arranged on the surface of the recycling barrel and comprises a guide rail, the guide rail is fixedly connected with the recycling barrel, a clamping groove is formed in the surface of the guide rail, a sliding sleeve is slidably connected to the surface of the guide rail, and a support is fixedly connected to the surface of the sliding sleeve. A blocking frame is fixedly connected to the surface of the support, a guiding part of the blocking frame is composed of two rotating pulleys, the pulleys of the blocking frame are symmetrically arranged up and down, and the sliding sleeve further comprises a driving mechanism used for driving the sliding sleeve to move in a reciprocating mode. And the rolling effect is optimized, follow-up carrying of the steel bars is facilitated, and deformation and scraping caused by disordered winding of the steel bars are reduced.

The utility model provides a miniature brushless ducted fan with LED (light-emitting diode) illumination, which comprises an outer shell, a lampshade is arranged on the front surface of the outer shell, a through air duct is arranged at the top of the outer shell, and an inverted turbofan is arranged in the air duct. The charging port is formed in the front face of the outer shell, the control switch and the indicator lamp are installed on the top of the outer shell, the lamp panel and the LED lamp beads are installed in the lampshade, the combination of the fan and the lighting function is achieved, the use requirements of a user in different scenes are met, and especially when the fan is used during night travel and outdoor camping, the user can enjoy cooling brought by the fan and can also enjoy the illumination function. According to the miniature brushless ducted fan, the LED lamp beads are distributed in an array mode, different light-emitting patterns can be formed by controlling the light-emitting sequence or brightness of the LED lamp beads, the functionality of the miniature brushless ducted fan is increased, and meanwhile the miniature brushless ducted fan can be made to be more practical.

The utility model relates to the technical field of battery production, in particular to a compression roller structure for automatic winding and a prime coater, the compression roller structure comprises a compression roller assembly, a driving assembly, a winding glue compression roller and a swing arm mounting plate, the compression roller assembly is arranged on a rotating tower and is symmetrically connected to two ends of the winding glue compression roller through a first compression roller swing arm and a second compression roller swing arm, and the driving assembly is arranged on the rotating tower. The pressure applying device is used for applying uniform pressure to a material in the winding process; the other end of the first compression roller swing arm and the other end of the second compression roller swing arm are connected with the driving assembly through the adjusting assembly, the driving assembly is fixed to an air cylinder fixing pin through a first air cylinder and a second air cylinder, the air cylinder fixing pin is arranged on the swing arm mounting plate, and the swing arm mounting plate can swing along an optical axis. The swing driving device is used for providing swing driving force for the pressing roller assembly and ensuring that a suspended base material is effectively pressed and contacted after passing through the winding rubber pressing roller, so that the bottom base material contacted with a winding drum is smoothed, the bottom winding effect is remarkably improved, and the bottom wrinkling phenomenon is reduced.

The utility model discloses a carbon fiber cloth weaving device, and belongs to the technical field of weaving devices. Comprising a knitting machine and a winding frame, the winding frame is arranged on one side of the knitting machine, an auxiliary frame is installed at the top end of the winding frame, integrated frames are symmetrically arranged on the outer wall of the knitting machine, bidirectional lead screws are movably installed in the integrated frames, and stepping motors are arranged at the top ends of the integrated frames; and the output end of the stepping motor is connected with the two-way lead screw, the surface of the two-way lead screw is sleeved with two sets of threaded sleeves, the threaded sleeves are in threaded connection with the two-way lead screw, and connecting plates are installed between the two sets of corresponding threaded sleeves. According to the carbon fiber cloth winding device, heat dissipation of carbon fiber cloth is achieved through convenient reciprocating swing air blowing, elastic covering, pressing and winding of the cloth are facilitated, the cooling speed of the cloth is increased, and the air blowing, heat dissipation and cooling effects of the carbon fiber cloth and the winding quality of the cloth are improved.

This utility model relates to the field of work machinery technology, and discloses an air conditioning assembly and work machinery. The air conditioning assembly includes: an evaporator having an air inlet and a first air outlet; and a first duct assembly including a face-blowing duct, a defrosting duct, and a first common duct. One end of the first common duct is connected to the first air outlet, and the other end is connected to the face-blowing duct and the defrosting duct, respectively. In this utility model, the face-blowing duct and the defrosting duct are connected to the first air outlet of the evaporator through the first common duct. Compared with the original independent duct, the first common duct has a larger flow cross-sectional area. Under the same air volume at the first air outlet, the air velocity in the first common duct is lower, thus effectively reducing the eddy current intensity in the first common duct, thereby reducing the air pressure loss during the air guiding process of the first duct assembly, increasing the air velocity at the air outlets of the face-blowing duct and the defrosting duct, so that the air conditioning assembly has a better air outlet effect under the same working power.

The utility model discloses a winding device for artificial turf production, which comprises a base, a shell positioned on the base, an adjusting rod and a movable plate driving mechanism, an inlet and an outlet are respectively arranged on two sides of the shell, and supports are symmetrically mounted at one end of the inner part of the shell; two driving shafts are rotationally arranged in the bracket through bearings; a screw rod is horizontally arranged in the two driving shafts; the air pump is matched with the water storage tank, so that floating dust, impurities and the like on the artificial turf enter the water tank, the quality of the artificial turf is improved, and the dust collection effect is good; the winding rollers with different diameters can be fixed conveniently, so that the winding rollers with different inner diameters can be used, operation is convenient, the winding effect is better, the winding rollers cannot shake, and the winding efficiency of the artificial turf is improved. The device is simple in structure, convenient to operate and worthy of popularization.

The present application relates to the technical field of household appliances, and provides a range hood, which comprises a machine body configured with an air inlet, a panel configured with a first connecting part and a second connecting part arranged at intervals, and an opening and closing mechanism comprising a first moving part and a second moving part, wherein the first moving part is rotationally connected to the first connecting part, the second moving part is connected to the second connecting part, and the first moving part and the second moving part switch the panel between a folded state and an unfolded state. In the unfolded state, the first moving part rotates the panel by a first angle, and the second moving part rotates the panel around the first connecting part by a second angle. When in use, switching the panel from the folded state to the unfolded state comprises two actions, the panel outside the air inlet can be unfolded at the air inlet, a larger width coverage is realized in a smaller movement space, and the air collection effect of the range hood is increased.

The utility model discloses an air outlet device of a fermentation room, which relates to the technical field of fermentation rooms and comprises a connecting plate, an air inlet pipe is fixedly arranged at the upper end of the connecting plate, a mounting frame is sleeved on the lower side of the outer surface of the air inlet pipe, and the mounting frame is connected with the connecting plate through bolts in a matching manner. An air inlet pipe is arranged in the air inlet pipe, a connecting plate is arranged on one side of the air inlet pipe, an air outlet plate is arranged on one side of the connecting plate, three connecting pipes are arranged between the air outlet plate and the air inlet pipe, a sealing frame is arranged in every two adjacent connecting pipes, two mounting plates are arranged between the air outlet plate and the connecting plates, and connecting blocks are connected between the air outlet plate and the adjacent mounting plates in a matched mode through bolts. According to the air outlet device of the fermentation room, the length of the ventilation pipeline can be conveniently adjusted, so that the air outlet device can be matched with fermentation rooms of different specifications for use, is convenient to assemble, high in universality, capable of absorbing water vapor in exhausted air and good in air outlet effect, and therefore the influence on follow-up air outlet is reduced.

This invention provides a damper control mechanism, an air conditioning vent device, and an automobile, relating to the field of automotive parts technology. The damper control mechanism is used to drive a damper. The damper includes a first and second baffle plate hinged together, a track disk, and cranks. Track grooves are provided on both sides of the track disk, each groove including a bending groove. Each bending groove includes a connected, angled arcuate section and a section A. One end of each crank is used to connect to the first and second baffle plates, respectively, while the other end of each crank has a protruding convex shaft located in its corresponding track groove. The track disk rotates around its own axis so that when one of the convex shafts moves in the arcuate section on one side of the track disk, the other convex shaft moves in the section A on the other side of the track disk. This damper control mechanism does not require a torsion spring when driving the damper, avoiding the problem of torsion spring failure after prolonged use.

This invention relates to the field of filter membrane preparation technology, specifically disclosing an equipment and process for preparing polyvinylidene fluoride (PVDF) membranes via phase inversion. The equipment includes a stirring and dissolving tank, a spinning tank, a core liquid tank, a spinneret, a first gel bath, a second gel bath, a winding device, and a control system. The stirring and dissolving tank and the spinning tank are connected via a first conveying assembly. Before spinning, this invention eliminates all air bubbles in the casting solution through the combined action of a mechanical stirring defoaming mechanism and a vibration defoaming mechanism in the spinning tank. This not only improves the quality of the subsequent spinning castings but also eliminates the need for a vacuum system. When the casting spinning traction speed changes, the fork-type telescopic adjustment frame can be adjusted via a telescopic drive component, thereby regulating the traction distance of the casting in the non-solvent or non-solvent mixture during traction. This ensures that the exchange rate between solvent and non-solvent in the casting remains the same, guaranteeing consistent product quality and performance.

The utility model discloses an air duct assembly and an air conditioner indoor unit. The air duct assembly comprises a shell, a centrifugal fan and a heat exchanger. The shell is provided with two air outlets formed in the height direction in a spaced mode. The centrifugal fan is arranged at the end of the air duct assembly in the length direction and comprises an outer volute, an inner volute and centrifugal fan blades. The inner volute is rotatably arranged in the inner cavity of the outer volute so that airflow exhausted by the centrifugal fan blades can flow to one of the two air outlets to change the air outlet position. The heat exchanger is located on the axial side of the centrifugal fan, and the length direction of the heat exchanger is parallel to the axis of the centrifugal fan. The motor used for driving the centrifugal fan can be placed on the axial side portion of the centrifugal fan, the compactness of the structure is further improved, the centrifugal fan can have the larger size under the condition that the overall size of the air duct assembly is small, the static pressure resistance of the centrifugal fan is high, the air outlet effect is improved, and the service life of the air duct assembly is prolonged. And the space occupation of the air conditioner indoor unit can be reduced.

The present application discloses a dust suppression fog cannon device using an eagle eye tracking system, which belongs to the field of dust suppression fog cannons, including a support frame, a barrel mounted on the top of the support frame, and an atomizing assembly mounted on the front end of the barrel, wherein the atomizing assembly includes: an extension plate, which is fixed to the front end of the barrel at equal intervals with the front end opening of the barrel as the center; a rotating fan, which is sleeved on one end of a rotating seat and rotates synchronously with the rotating seat; a water inlet ring, which is mounted on the outside of the front end of the barrel; an annular liquid guide tube, which is mounted on the outside of the extension plate; a wind source assembly is fixed inside the rear end of the barrel, and an air supply tube is fixedly connected inside the barrel between the wind source assembly and the atomizing assembly. The present application changes the ventilation volume inside the air supply tube, so that the water mist near the construction area can be sprayed more widely, increasing the diffusion range of the water mist in a straight line near the construction area, and at the same time, the rotating fan rotates faster, and its centrifugal force is greater, thereby increasing the diffusion range of the width of the water mist near the construction area.

The utility model discloses a gray fabric traction device convenient to store, relates to the technical field of gray fabric traction, solves the problem that the gray fabric traction device is inconvenient to store and protect after being used, and comprises a storage box, a moving mechanism is arranged at the bottom of an inner cavity of the storage box, and an L-shaped supporting plate is fixedly connected to the top of the moving mechanism. By arranging the positioning frame, the traction roller and the pressing roller, the gray fabric can be dragged and guided in the gray fabric winding process, by arranging the servo motor, the threaded rod, the threaded sleeve and the L-shaped supporting plate, the positioning frame, the traction roller and the like can be supported, and the gray fabric can be conveniently wound. Meanwhile, after the grey cloth is dragged, a positioning frame, a traction roller and the like can be driven to move rightwards, the grey cloth is stored in a storage box to be protected, damage caused by collision can be avoided, meanwhile, dustproof protection can be achieved, and the service life of the device is prolonged.

The utility model relates to an air duct one-way valve of an air curtain machine, which comprises a valve body frame, a one-way plate and a check block, the valve body frame is of a frame structure and forms a ventilation channel, the one-way plate is hinged with the valve body frame, the check block is fixed on the valve body frame, extends inwards and can prevent the one-way plate from rotating inwards, and a fan opposite to an air outlet is arranged in the air curtain machine. The two air outlets are communicated through the air duct, the one-way valves are fixed to the inner walls of the air outlets, close to the fans, of the air duct, air outlet of the two fans cannot interfere with each other, and the air outlet effect of the fans is improved.