49results about How to "Increase airflow" patented technology

The invention belongs to the technical field of chip processing, and discloses a wafer laser cutting device based on chip processing, which comprises a vibration mechanism, the vibration mechanism comprises four sliding blocks, the interiors of the sliding blocks are fixedly connected with first motors, and the first motors are rotatably connected with cams; through cooperation of the cam, the clamping plates and other structures, the laser cutting effect of the wafer is improved, the first motor is started to enable the wafer clamped among the four clamping plates to generate slight vibration in the vertical direction, the slight vibration promotes micro movement of a material in the laser cutting process, better interaction between a laser beam and the material is facilitated, and the laser cutting efficiency is improved. A more uniform and smoother cutting face is achieved, the vibration effect can accelerate the melting or crushing process of materials, the cutting time is shortened, the cutting efficiency is improved, meanwhile, vibration can accelerate airflow on the surface of a wafer, a certain heat dissipation effect is achieved, local overheating of the materials is reduced, expansion of a heat affected zone is avoided, and the flatness of the cutting edge is improved.

The invention discloses an explosion-proof motor for an underground coal mine, and relates to the technical field of explosion-proof motors, and the explosion-proof motor comprises a housing, the outer wall of the housing is fixedly connected with a plurality of short fins at equal intervals, the inner wall of the housing is fixedly connected with a stator around the circumference, and the inner wall of the center of the housing is rotatably connected with a rotating shaft. Through vertical separation of the flow guide plate and flow guide of concave arc faces on the two sides, the resistance of hot air shunting to the two sides can be reduced, after the hot air enters the ventilation cavity, the heat dissipation area is increased under the flat arrangement of the hot air, and heat on the surface of the ventilation cavity is rapidly guided out through cooperation of the unfolded first fins, the unfolded second fins and the unfolded third fins, so that the heat dissipation efficiency is improved. The temperature exchange rate can be increased through double heat conduction, hot air in the ventilation cavity can be rapidly cooled, airflow and temperature on the two sides can be balanced, the stability of the system is improved, the equipment temperature can be reduced through good heat dissipation, and electric sparks caused by overheating are reduced.

The utility model relates to the technical field of treatment ponds, and particularly discloses a static treatment pond structure of an aquaculture auxiliary pond, which comprises a water pond and a filter component arranged in the water pond, a water outlet pipe body and a water inlet pipe body are arranged on the side edge of the water pond and are both communicated with the water pond, the ends, away from the water pond, of the water outlet pipe body and the water inlet pipe body are connected with an external culture pond, and the water inlet pipe body comprises a first extending pipe body and a central drainage valve which is arranged in a water collecting pit at the bottom of the culture pond. One end of the first extension pipe body is communicated with the pool, and one end far away from the pool extends to the culture pond sump and is communicated with the central drain valve.

The application relates to a heat dissipation technology field of a fuel cell, in particular to a heat dissipation device integrated with anti-vibration and a fuel cell heat dissipation system, which comprises a shell, a fan arranged in the shell and a heat exchanger arranged on the side of the shell, and further comprises two opposite vertical arms arranged in the shell, a plurality of guide vanes corresponding to the gaps between two adjacent fins of the heat exchanger are rotatably arranged between the two vertical arms; the inclined guide vanes can change the flow direction of the airflow, so that the airflow can directly impact the wall surface of the fin, thereby effectively destroying the airflow layer wrapped on the fin due to vibration and not easy to flow, when the vibration intensity increases, the swing amplitude of the guide vanes increases, so that the stripping effect of the airflow on the low-speed airflow layer attached to the wall surface of the fin is more intense, the stripping effect of the airflow layer automatically matches the current vibration condition, the speed regulation mechanism increases the rotating speed of the fan, compensates for the additional wind resistance loss, and ensures that the convective heat exchange efficiency is maintained under different intensity vibration working conditions.

The utility model discloses a top air outlet type air conditioner outdoor unit which comprises a machine shell comprising a base plate formed by splicing a first bottom plate and a second bottom plate. The outdoor heat exchanger is arranged on the base plate and defines a heat exchange space, and a notch is formed in the side wall of the outdoor heat exchanger and comprises a first notch section and a second notch section. The compressor is arranged in the heat exchange space, is arranged on the first bottom plate and is close to the first notch section; the gas-liquid separator is arranged on the second bottom plate and is close to the first bottom plate; the oil separator is arranged on the first bottom plate and located on the side, away from the first notch section, of the compressor. The stop valve is close to the first notch section relative to the gas-liquid separator, and the projection of the stop valve on the chassis is located on the second bottom plate; and the four-way valve is arranged on the side, away from the first notch section, of the stop valve, the height of the four-way valve is between the height of the stop valve and the height of the gas-liquid separator, reasonable layout of all parts of the outdoor unit in a limited space is achieved, and manufacturability and maintainability are both considered while the space utilization rate is increased.

The invention discloses a fire-fighting spraying and fire barrier system for a high-rise building, and relates to the technical field of fire-fighting systems. The high-rise building fire-fighting spraying and fire barrier system comprises a water source, a water supply pipeline, a control device, a nozzle and a fireproof material, the control device comprises a smoke detector, an alarm valve group, a water flow indicator and a signal valve, and the smoke detector comprises a protective cover and a smoke sensor body arranged in the protective cover; and a pressurizing mechanism is arranged in the protective cover. According to the fire-fighting spraying and fire barrier system for the high-rise building, through the design of the pressurizing mechanism, the pressurizing mechanism can be started conveniently when the smoke sensor main body detects the smoke content and the smoke content does not reach a set threshold value, the airflow circulation speed is increased, and therefore nearby air is pressurized and actively sucked after smoke sensing, and the safety of the high-rise building is improved. The alarm can be triggered at the first time when the smoke is increased, and the sensitivity of the smoke sensor main body is improved.

The present invention discloses an energy-saving and noise-reducing low-pressure fan, which relates to the field of fans and comprises a base, wherein a driving member is arranged at the upper end of the base, a transmission member is arranged at the output end of the driving member, and a support block is arranged at one end of the transmission member away from the driving member, a driving cylinder is arranged at the end of the support block, and a protective component is rotatably installed on the inner wall of the driving cylinder, and the end of the transmission member is limited by the protective component; the energy-saving and noise-reducing low-pressure fan limits an adjustment plate by a push block and a limiting block, and then adjusts the position of the push block so that the part surrounded by the adjustment plate is in a forward cone or a reverse cone, and reduces the airflow velocity and pressure loss by gradually increasing the cross-sectional area of ​​the airflow channel, and accelerates the airflow by gradually reducing the cross-sectional area of ​​the airflow channel, thereby improving the efficiency of the fan and reducing the noise.

The invention discloses a tuyere honeycomb guide plate structure and device suitable for uniform distribution of a wind field of large-breadth metal additive equipment, and relates to the technical field of metal 3D printing. The tuyere honeycomb flow guide plate structure comprises a tuyere honeycomb flow guide plate structure body, a third jet flow channel is arranged in the tuyere honeycomb flow guide plate structure body, the third jet flow channel is of a gradient caliber, and the third jet flow channel comprises a first jet flow channel, a fourth jet flow channel and a second jet flow channel. An air inlet is formed in the side end, close to one side, of the tuyere honeycomb guide plate structure body; air flow is introduced into the air blowing structure and rectified through the air opening honeycomb flow guide plate structures evenly distributed in the air field of the large-breadth metal additive equipment, air flow parallel to the front is obtained, the air suction structure sucks air after being externally connected with the draught fan, the air flow on the forming plane shows the uniform flow speed and the high average air flow strength, and the air flow in the forming plane is uniform in flow speed and high in average air flow strength. In this way, smoke dust at all positions in the machining process can be effectively removed.

This invention discloses a roughness testing device and method for plastic-coated steel pipes, belonging to the field of steel pipe testing technology. It includes an operating table, with an equipment box bolted to its upper surface. A wide-angle high-definition camera is mounted on the lower surface of the equipment box. A fixing plate and a connecting plate are bolted to the upper surface of the operating table. A motor is bolted to the outer wall of the fixing plate. During operation, the device transfers the workpiece to the operating table using a robotic arm. An electric telescopic rod then drives a clamping plate to hold the workpiece. The motor then rotates the connecting plate and the clamping plate, allowing the wide-angle high-definition camera to perform a comprehensive inspection of the workpiece. A cleaning roller cleans the workpiece, removing particulate impurities from its surface, thus improving the accuracy of the wide-angle high-definition camera's results.

The utility model relates to garbage can inner bag manufacturing equipment technical field, and disclose a kind of injection mould rapid cooling's garbage can inner bag manufacturing equipment, including base and fixedly installed lower die holder on the upper end of base, the upper end of lower die holder is installed with upper die holder, cooling structure is installed on the lateral wall of lower die holder and upper die holder, injection liquid is introduced from injection port, using the cooperation of mould core and mould cavity can be shaped to injection liquid, the heat conduction layer of cooperation arrangement is favorable to the heat dissipation of mould core, in the process, start suction pump, and cooperate with duct and suction pipe can be drawn into cooling channel, can realize the purpose of air cooling, start a group of pump body simultaneously, and cooperate with water cooling pipe and circulating pipe can extract cooling liquid in water tank to cooling cavity, can carry out cooling to injection liquid, can realize the cooperation cooling of injection liquid air cooling and water cooling, shorten the forming time of injection liquid, effectively improve production efficiency.

The utility model relates to the technical field of plenum chambers, in particular to an adjustable plenum chamber air supply structure which comprises a chamber body, an air inlet pipe, an air supply pipe, a driving assembly, a guide assembly, an adjusting assembly, a mounting assembly and a filtering assembly. An air inlet pipe is arranged on one side of the box body, an air supply pipe is arranged on the other side of the box body, a driving assembly is arranged on the side wall of the box body, a guide assembly is arranged on the inner wall of the box body, an adjusting assembly with an adjusting function is arranged below the guide assembly, a mounting assembly is arranged in the box body, and a filtering assembly is arranged in the mounting assembly; the driving assembly is started to drive the guide structure to move bidirectionally, the guide structure can drive the adjusting structure to move bidirectionally, the air direction of the air supply outlet and the size of the air outlet can be adjusted through the adjusting structure, and therefore the purpose of air volume adjustment can be achieved.

The utility model discloses a cooling structure of a centrifugal water pump shaft seal, which belongs to the technical field of centrifugal water pumps and comprises a driving motor, a driving rod is fixedly mounted at the transmission end of the driving motor, a pump body is arranged on the right side of the driving motor, and a supporting seat is fixedly mounted at the lower ends of the driving motor and the pump body. The centrifugal water pump shaft seal cooling structure comprises a pump body, a driving motor is arranged on the pump body, an air inducing mechanism and an air making mechanism are arranged between the driving motor and the pump body, a flow guide ring is fixedly installed on an installation frame, and a transmission ring and a flow guide fan body are arranged on the inner side of the flow guide ring. The air making mechanism basically achieves the zero-energy-consumption heat dissipation and cooling effect by means of transmission force of a driving motor and a driving rod in the centrifugal water pump, the air making mechanism guides flow and circulates into air inducing grooves in a second air inducing plate in the air inducing mechanism, air enters the multiple sets of air inducing grooves at the same time, airflow in the air inducing grooves is accelerated, heat is taken away, then the sealing ring is rapidly cooled, and the service life of the sealing ring is prolonged. And the shaft seal body on the inner side of the sealing ring is quickly cooled.

The invention relates to the technical field of ovens, in particular to an exhaust pipeline of an oven and the oven, and aims to solve the problem that an existing oven is poor in heat dissipation effect. In order to achieve the purpose, the exhaust pipeline of the oven comprises a reducing pipe section, and the sectional area of the reducing pipe section is gradually reduced in the direction from the air inlet end to the exhaust end. On the basis of the fluid mechanics principle, a variable-diameter pipe section is designed in an exhaust pipeline, the sectional area of the variable-diameter pipe section is gradually reduced in the direction from the air inlet end to the exhaust end, a gradually-shrunk channel can be formed through the design, airflow acceleration is promoted, and the negative pressure effect is improved. When the sectional area is reduced, the flow speed is increased, so that the hot air flow in the pipeline can be discharged out of the exhaust pipeline more quickly, and the exhaust efficiency is improved.

The utility model relates to the field of film production discloses a film's air cooling device, including the conveyance case, the lateral wall of conveyance case is provided with the fan, the left end fixed connection of fan has the connecting pipe, the outer wall fixed connection of connecting pipe has the fixed pipe, the outer wall sliding connection of fixed pipe has the sleeve pipe, the fixed connection of sleeve pipe's end has the movable pipe, the top fixed connection of movable pipe has the sliding block, the inner wall of sliding block is provided with drive mechanism. In the utility model, through the conical groove structure of fan cooperation connecting pipe and movable pipe, can accelerate airflow, enhance air cooling efficiency, can effectively to the film on the conveyance belt rapid cooling. Simultaneously with the cooperation of bidirectional screw rod and sliding block, can adjust movable pipe position as needed, also can make its reciprocating movement, realize according to the flexible adjustment air cooling range of film width, ensure that large area film can also obtain uniform and efficient air cooling cooling.

This utility model discloses an ice maker, including a housing with a receiving cavity. The receiving cavity contains an ice chamber, a condenser, and a cooling fan. The housing has air inlets and outlets on both sides. An air guide shroud is also provided inside the receiving cavity, covering the ice chamber to form a heat dissipation channel between the shroud and the outer wall of the ice chamber. The two ends of the heat dissipation channel are connected to the air inlets and outlets, respectively. The condenser is located at the outlet end of the heat dissipation channel. This utility model, by covering the ice chamber with an air guide shroud to form a heat dissipation channel between the shroud and the ice chamber, increases the airflow velocity as it flows through the heat dissipation channel towards the outlet. By placing the condenser at the outlet end of the heat dissipation channel, the airflow exiting the channel passes through the condenser, thereby increasing the airflow through the condenser and rapidly cooling it, thus enhancing the heat dissipation effect.

The utility model relates to the technical field of soil remediation, and discloses a soil organic matter environment-friendly treatment device which comprises a conical box, a water tank is fixedly connected to the bottom of the outer side of the conical box, a heating disc is fixedly connected to the inner side of the water tank, and a water receiving ring is fixedly connected to the top of the inner wall of the conical box. The periphery of the bottom of the water receiving ring is communicated with a distillation tank, the bottom of the distillation tank penetrates through the conical box and is communicated with the water tank, the top of the conical box is fixedly connected with a top cover, the middle of the bottom end of the inner wall of the conical box is fixedly connected with a positioning cover, and the middle of the bottom end of the conical box is fixedly connected with a direct current motor. According to the utility model, through the matching among the direct current motor, the auger and the conical box, the mixing and heating effects can be enhanced, the recycling of water for distillation is realized, and through the matching among the auger, the fixing ring and the mixing blades, the soil mixing time can be further improved, and the processing time can be further shortened.

A heat exchanger system for an aircraft includes a nacelle having an inlet and an outlet, a nacelle heat exchanger located within the nacelle, and a fan system located within the nacelle. Air flows into the engine compartment through the inlet and out of the engine compartment through the outlet. The nacelle heat exchanger is configured to transfer heat from the coolant to the nacelle heat exchanger using air in the airflow. The fan system is configured to increase airflow to the nacelle heat exchanger.

The utility model relates to an impeller dust suction device which comprises a cabinet with universal wheels at the bottom, a first partition plate and a second partition plate which are arranged up and down are fixed in the cabinet, the cabinet is sequentially divided into a first cavity, a second cavity and a third cavity from top to bottom, the second cavity is respectively communicated with the first cavity and the third cavity, and the third cavity is communicated with the first cavity and the third cavity. A vertically-through frame is fixed in the first cavity, a filter screen is arranged at the bottom in the frame, a collecting cavity is formed between the upper surface of the filter screen and the inner walls of the four sides of the frame and used for collecting dust, and a flow inlet mechanism communicated with the first cavity is arranged on the cabinet. The impeller rotates to generate suction force, and the impeller is designed to optimize the shape, size and arrangement of the blades according to the fluid mechanics principle, so that turbulent flow and noise in airflow are reduced, the mute effect is good, meanwhile, efficient airflow can be kept, the dust collection effect is improved, the overall structural layout is optimized, the whole equipment tends to be miniaturized, and the equipment is more compact. The occupied space of equipment is reduced, and workshop layout is facilitated.

This utility model relates to the field of wheat processing technology and discloses a high-efficiency wheat washing and screening device, including a casing. An impurity discharge hole is provided on one side of the casing. A third fixing plate is fixedly connected to the upper outer side of the casing. A screening mechanism is provided on the top of the third fixing plate. An air duct box is provided on the side of the casing away from the impurity discharge hole. A first optical axis is provided inside the air duct box. An isolation plate is rotatably connected to the outer wall of the first optical axis. A second optical axis is rotatably connected to the side of the isolation plate away from the air duct box. An adjusting strip is rotatably connected to the outer wall of the second optical axis. In this utility model, airflow is generated by a blower mechanism and transported into the casing through the air duct box. The adjusting strip allows for upward adjustment, thus solving the problems of poor purification effect and increased raw material loss in traditional wheat washing and screening devices.

The invention belongs to the technical field of dustproof devices, and particularly relates to a dustproof device for a substation equipment box, which is characterized in that the dustproof device comprises a box body, a first cover plate is rotatably connected to the outer wall of one side of the box body, a treatment box is fixedly connected to the bottom of the box body, and a bottom box is fixedly connected to the bottom of the treatment box; the bottom of the bottom box is fixedly connected with a first transfer box, and the bottom of the first transfer box is fixedly connected with a motor. The purification treatment mechanism arranged in the bottom box can further filter and purify the dedusted gas, and the condensation drying mechanism arranged in the bottom box can dry the gas, so that the subsequent influence on the safety of equipment in the box body is avoided; the electrostatic dust removal mechanism arranged on the inner wall of the treatment box can be used for conducting final dust removal treatment on dust through an electrostatic field, airflow can be rotationally and evenly guided into the box body through the rotary ventilation mechanism arranged in the box, and the purposes of efficient dust removal, ventilation and heat dissipation are achieved.

This invention provides a rear-mounted guide vane with a cylindrical body for an axial flow fan, belonging to the field of ventilation equipment technology. It solves the problems of insufficient airflow or low static pressure efficiency in the high static pressure zone in existing technologies. This invention includes a guide vane body, guide vane blades, and a central hub. The two sides of the guide vane body are the outlet side and the inlet side, respectively, with the diameter of the outlet side being larger than that of the inlet side. The guide vane body is integrally formed and has a conical ring shape. The inner wall of the guide vane body forms a first mounting surface, which is a conical ring structure. The central hub is ring-shaped, and several mounting protrusions are formed on one side of the central hub. The outer surface of the central hub and the mounting protrusions forms a second mounting surface. The guide vane blades are numerous and arranged in a circumferential array, fixed between the first and second mounting surfaces. The cross-section of the guide vane blades is a thin plate structure of uniform thickness with an arc shape. This invention has the advantages of reducing turbulence, increasing airflow in the high static pressure zone, high static pressure efficiency, and increased range.

The invention relates to the field of transformers, in particular to an adjustable transformer with a moisture-proof function, which comprises a shell, fins and the like, and a plurality of fins are arranged on the shell. According to the invention, after the adjusting cover is unfolded, a worker can place a carried tool on the adjusting cover, so that the worker does not need to hold the tool all the time when maintaining the high-voltage terminal, the hands of the worker can be released to maintain the high-voltage terminal, and the convenience of the worker in maintaining the high-voltage terminal is improved; after the adjusting covers are unfolded, the adjusting covers are located above the fins on the front side and the rear side respectively, a worker can stand on the front side and the rear side of the shell to maintain the high-voltage terminal, the unfolded adjusting covers can block and bear small parts or bolts, and the situation that the worker difficultly takes out the small parts or the bolts due to the fact that the small parts or the bolts fall and are clamped between the fins is avoided; and meanwhile, pedestrians can be prevented from being injured by small parts or bolts.

The utility model provides a kind of high refrigeration performance's circulating fan, air duct uses the design of different cross-sectional area of air inlet end, air outlet end and wind passing section, combine the shell of hyperbolic structure and outer wall surface smooth transition, air inlet end large cross-sectional area makes air mass enter, wind passing section small cross-sectional area accelerates airflow, according to Bernoulli's principle, flow rate accelerates and causes pressure to reduce, temperature drops, and gas is similar to adiabatic expansion in flow, work to outside makes internal energy decrease.Air outlet grille area is less than air inlet grille, and air outlet grille strip is located between adjacent air inlet grille strip, avoid airflow interference, ensure air orderly flow, air outlet grille towards the sharp corner structure of air inlet end, not only strengthen air outlet directional property, make airflow concentrated blow out, expand refrigeration coverage, it is also possible to airflow produce cutting and disturbance, promote heat exchange, improve refrigeration performance, the refrigeration performance and circulation performance of the fan are used with air conditioner, and good energy-saving effect can be achieved.

The present invention provides a pressurized mixed flow generator for a portable bladeless fan, comprising: a mixed flow fan, which rotates around a rotating axis to generate airflow, the mixed flow fan comprising a rotating seat and a first blade connected and equidistantly arranged on the circumferential side of the rotating seat; a pressurizing member, comprising a pressurizing seat and a second blade connected and equidistantly arranged on the circumferential side of the pressurizing seat, the pressurizing member being located in front of the mixed flow fan; wherein the first blade and the second blade are closely spaced in the axial direction to form an equivalent partition gap, so as to prevent the airflow generated by the mixed flow fan at the air outlet end from flowing back to the air inlet end along the axial gap between the first blade and the second blade, and to prevent the wind from flowing in series between two adjacent second blades, thereby combing the airflow and increasing the wind pressure, thereby achieving wind guidance and noise reduction.

The present invention belongs to the technical field of clothing processing devices, and discloses a lifting rib for a clothes dryer and a clothes dryer, wherein the lifting rib comprises a shell having a hollow chamber, an air outlet is provided on the shell, and an air blowing pipeline assembly is arranged in the hollow chamber; the air blowing pipeline assembly is connected to the shell, and blows air to the outside of the shell through the air outlet on the shell. The lifting rib of the present invention can blow air to the outside of the lifting rib through the internal air blowing pipeline assembly, and can blow away the clothes covered on the lifting rib, thereby preventing the clothes from being entangled during the drying process, improving the drying efficiency of the clothes, and reducing the generation of wrinkles during the drying process of the clothes.

The utility model relates to a multifunctional dust collection and air blowing all-in-one machine which comprises a machine body, a grip, a dust storage bin, a dust collection nozzle and an air blowing head. The dust storage bin comprises a bin body and a bin cover, the first side of the bin cover is rotationally connected with the first side of the bin body, the second side of the bin cover is movably connected with the second side of the bin body, a dust storage cavity is formed in the bin body, a dust collection channel is formed in the bin cover, and the dust collection channel is communicated with the dust storage cavity; the first end of the machine body is detachably connected with the bin body, and the second end of the machine body is detachably connected with the blowing head; one end of the dust collection nozzle is inserted into the dust collection channel of the bin cover; the dust collection nozzle, the dust storage bin, the machine body and the blowing head are sequentially connected in the first direction, the grip is connected with the machine body in the second direction, and the first direction intersects with the second direction. The multifunctional dust collection and air blowing all-in-one machine has multiple functions of dust collection, air blowing, fanning cooling and the like. Meanwhile, the connection structure of the bin cover and the bin body of the dust storage bin is simple and tight, so that the bin cover is convenient to open, and dust and chippings accumulated in the bin body are cleaned.

The utility model discloses an intelligent massage chair with a ventilation function, which comprises a bottom table, a sliding table is arranged at the top end of the bottom table in a sliding manner, an intelligent massage chair body is fixed at the top end of the sliding table, a chair back is arranged on one side of the top end of the intelligent massage chair body, and ventilation holes are formed in the surface of the chair back. A blowing fan is mounted on the inner wall of one side of the chair back, and a wireless WIFI control panel electrically connected with the input end of the blowing fan is mounted on the outer wall of one side of the intelligent massage chair body; and the fixing plates are fixed to the two ends of the interior of the bottom table, and supporting tables are installed on the two sides of the top end of the sliding table in a sliding mode. The massage chair can be correspondingly adjusted according to the heights and the body types of different users, the height of the adjustable chair ensures that the massage chair perfectly adapts to the body positions and postures of the users, more accurate and effective massage is provided, the adjustment of the height of the chair can help the users to find the most comfortable sitting postures, and discomfort is reduced.

The utility model discloses a tobacco leaf sorting and dust removing device which comprises a machine frame and a belt conveyor installed on the machine frame, and a winnowing device which transversely supplies air relative to the running direction of the belt conveyor is arranged above the belt conveyor. The device is simple in structure and low in cost, and adopts a transverse air supply mode, so that transverse air can be blown along the surfaces of tobacco leaves, and dust and light impurities on the surfaces of the tobacco leaves can be blown away from the surfaces and taken away. In addition, a transverse air flow guide structure is added to guide airflow, so that a negative pressure flowing area can be formed from an area above the tobacco leaves to an airflow area, impurities on the surfaces of the tobacco leaves form dust flow to be taken away, and the dust removal effect and the dust removal efficiency are greatly improved. And dust in air in a workshop can be effectively reduced, the workshop environment is improved, and good practicability and popularization prospects are achieved.

The invention discloses an air supply exhaust cabinet, comprising an exhaust cabinet body and a visual window, wherein a chamber with an opening on the front side is formed inside the exhaust cabinet body, a workbench is arranged at the lower part of the chamber, a static pressure box capable of supplying air into the chamber is arranged at the bottom of the workbench, a top plate is arranged at the top of the exhaust cabinet body, side plates are arranged at both sides of the exhaust cabinet body, and a column structure is connected to the front end of the side plate; the exhaust cabinet body also comprises an air wing structure, which is arranged at the front lower part of the chamber and connected to the static pressure box; the static pressure box comprises a first air supply channel and a second air supply channel; the air wing structure is provided with an air inlet and an air outlet, the air inlet is connected to the first air supply channel, and the air outlet is connected to the chamber; the column structure comprises a column inner cavity, and an air supply groove is arranged near the chamber side of the column structure, wherein the second air supply channel is connected to the column inner cavity, and the column inner cavity is connected to the air supply groove. In this way, the air supply effect is improved, the air flow in the exhaust cabinet is ensured to be stable, and energy consumption can be reduced without using a high-power fan.

The invention discloses a sewage-preventing air filtering system for a sewage tank, which comprises a sewage tank assembly, a sewage tank body, a sewage tank cover, an air filtering part arranged in the sewage tank cover, an air filtering fixing plate arranged at the lower end of the air filtering part, and a water suction opening formed in the air filtering fixing plate, a vacuum motor is arranged in the sewage tank body, the sewage tank further comprises a sewage filtering part, and a sewage impurity treatment part is arranged on the sewage filtering part; the air filtering assembly comprises an air filtering pipe arranged on the sewage tank body, a plurality of air filtering inner pipes arranged in the air filtering pipe, air filtering parts arranged on the air filtering inner pipes and air filtering clamping pieces arranged on the air filtering parts, and each air filtering inner pipe is provided with a rotating cylinder; and an air filtering ring plate is arranged in the rotating cylinder.