89results about How to "Adjust air volume" patented technology

The invention relates to a mixed flow air conditioner. The mixed flow air conditioner comprises a shell body provided with an air inlet and an air outlet, a draught fan arranged in the shell body, a heat exchange device, a straight-through path, a first heat exchange air channel and a second heat exchange air channel. The straight-through path is configured into an upstream for communicating the heat exchange device and a downstream of the heat exchange device, so as to allow air at the upstream of the heat exchange device to directly pass through the downstream of the heat exchange device through the straight-through path. The first heat exchange air channel is configured to allow part of air subjected to heat exchange of the heat exchange device to flow to the air outlet through the first heat exchange air channel, and the air is mixed with air from the straight-through path and then is blown to an environment space. The second heat exchange air channel is configured to allow part of the air subjected to the heat exchange of the heat exchange device to flow to the air outlet through the second heat exchange air channel and then the air is directly blown to the environment space. The opening degrees of air inlet ends of the straight-through path, the first heat exchange air channel and the second heat exchange air channel are adjustable, so that the quantity of the air flowing into the straight-through path, the first heat exchange air channel and the second heat exchange air channel can be adjusted according to actual requirements, and a ratio of the mixed air to the heat exchange air is adjusted.

The invention discloses a novel fume hood. The fume hood comprises a body, wherein the body is provided with an electric air valve; a lifting safety sliding door is arranged on the front of the body; and a face velocity sensor is also arranged on the front of the body. The fume hood also comprises a central control system electrically connected with the electric air valve, the safety sliding door and the face velocity sensor, wherein the face velocity sensor monitors pressure changes in the body after the safety sliding door is lifted, converts the values of pressure changes in the body into electrical signals and transmits the electrical signals to the central control system; and the opening angle of the electric air valve and lifting of the safety sliding door are controlled by the central control system. The fume hood has the following beneficial effects that: energy consumption and air loss in the laboratory are greatly reduced so that a relatively stable environment is maintained for experiments, thus achieving the aims of energy conservation and environmental protection and greatly improving the comfort level and environmental protection property of the laboratory.

The invention relates to an ejecting staged combustion W flame boiler for improving ignition and combustion of pulverized coal. The W flame boiler comprises a furnace hearth which is formed by an upper furnace hearth, a lower furnace hearth, a front furnace arch and a rear furnace arch, a plurality of secondary air nozzle groups which are arranged on the front furnace arch and the rear furnace arch, and a plurality of pulverized coal airflow nozzle groups, wherein the plurality of secondary air nozzle groups and the plurality of pulverized coal airflow nozzle groups are arranged side by side linearly, equidistantly and abreast along a width direction of a furnace, the plurality of pulverized coal airflow nozzle groups can be arranged on the furnace arches at fixed angles, an incident angle of secondary air can be adjusted, a plurality of over-fire air nozzles with adjustable incident angles can be formed in the upper furnace hearth, and two layers of tertiary air nozzles with the adjustable incident angles can be formed in water-cooled walls of front and rear walls of each furnace hearth. By adopting the W flame boiler disclosed by the invention, the combustion of the pulverized coal in the furnace can be effectively improved, the adaptive capacity of the boiler to coal types can be improved, the heat and reheat steam temperature can be effectively adjusted to reach a design value, the emission of NOx and the flue gas temperature can be reduced, slag bonding of the front and rear walls can be prevented, and the thermal fatigue existing in water-cooled walls of a combustion chamber hopper can be avoided.

The invention relates to a compact and low-noise ship variable air volume air conditioner. A fresh air port, an air return port and an air supply outlet are formed in a mixed box; a channel from the fresh air port to the air supply outlet is provided with a fresh air electric regulating air valve, a fresh air temperature and humidity sensor, a fresh air pre-heater, a fresh air induced draught fan, a filter, a steam heater, a cooler, a steam humidifier, a water retaining device, a variable frequency air supply centrifugal fan and an air supply temperature and humidity sensor sequentially; and a channel of the air return port is provided with an air return regulating air valve, an air return temperature and humidity sensor and air return port silencing grille. The fresh air electric regulating air valve and the fresh air induced draught fan conduct combined control over the fresh air volume, and when the total air volume is changed, fresh air supply with quantified air volume is guaranteed; and fresh air and return air are mixed in the mixed box, sequentially pass through the filter, the steam heater, the cooler, the steam humidifier, the water retaining device and the variable frequency air supply centrifugal fan sequentially and are sent into an air pipe of an air conditioner system through the variable frequency air supply centrifugal fan, so that centralized treatment of refrigeration, heating and dehumidification of air supply in the air conditioner area is achieved.

The invention discloses a coal type less oil ignition burner capable of controlling the vortex width. A primary air pipeline of the coal type less oil ignition burner is communicated with a second-stage pulverized coal burning chamber through a pulverized coal condenser; a first-stage pulverized coal burning chamber is arranged in the second-stage pulverized coal burning chamber which extends into a third-stage pulverized coal burning chamber; and the lateral surface of the third-stage pulverized coal burning chamber connected with the second-stage pulverized coal burning chamber is equidistantly provided with a plurality of secondary air inlets. One end of a central air duct of a controllable vortex bluff body is a cavity cone; the central air duct passes through the primary air pipeline, the pulverized coal condenser and the first-stage pulverized coal burning chamber; the cavity cone extends out and is positioned outside the first-stage pulverized coal burning chamber; and the circumference at the bottom of the cavity cone is evenly provided with a plurality of round holes and a plurality of oil burning chambers obliquely and equidistantly pass through the second-stage pulverized coal burning chamber and then are arranged on the first-stage pulverized coal burning chamber. By adopting the controllable vortex bluff body, the invention prolongs the stay time of pulverized coal in the burners and improves the ignition stability. The invention is not only can be used as the ignition burner, but also can be used as a main burner and a burner with lower load and stable burning.

The invention discloses a manually concealed air outlet mechanism which comprises an outer shell, a fixing frame, a blade control assembly, a rotary drum control assembly and an air door control assembly. The fixing frame is arranged in the outer shell, the outer shell comprises an upper shell, a lower shell and an air outlet cover plate, and air outlets and air inlets are formed in the outer shell; an upper air outlet channel and a lower air outlet channel are formed between the fixing frame and the upper shell, between the fixing frame and the lower shell and between the fixing frame and theair outlet cover plate; air swing blades and air volume control rotary drums are arranged in the upper air outlet channel and the lower air outlet channel, and an air door is arranged at the air inlets. The manually concealed air outlet mechanism has the advantages that structures such as the air swing blades are arranged in the manually concealed air outlet mechanism, and accordingly the manually concealed air outlet mechanism is attractive in integral structure; up-down air channel distribution structures are adopted, air can be selectively blown out in the up-down directions, and accordingly the manually concealed air outlet mechanism can be in diversified air outlet modes; the air volume control rotary drums can rotate under the convenient control, accordingly, the internal air volumes of the upper air outlet channel and the lower air outlet channel can be controlled, the opening degree of the air door can be conveniently controlled, and the total air inlet volume can be controlled.

The invention provides a wall-attached air duct which comprises a duct body. One end of the duct body is an air inlet while the other end of the same is an air outlet, an air retaining plate is arranged in the duct body, and multiple lateral air outlets are arranged on the duct body spirally and all positioned between the air inlet and the air retaining plate. A tunneling working face provided with a press-in-type ventilation system and a foam or spray dedusting system is adopted in a coal mine; by arranging the air retaining plate inside the duct body, when airflow passes through the air retaining plate inside the duct body, a part of the airflow can be diverted to flow towards the lateral air outlets, the airflow becomes spiral airflow through the lateral air outlets which are spirally arranged to blow to the working face at low speed, fresh airflow blows to the working face at low speed to inhibit dust flying, an air curtain is formed around the working face to stop dust-containing airflow of the working face from spreading outwards and effectively prevent gas from gathering, and the air retaining plate can adjust air quantity. The wall-attached air duct is easy to process and convenient to mount.

The present invention discloses a heat dissipation method of a switch power supply module. The method comprises the following content: 1) a switch power supply runs, a heat dissipation fan starts to rotate, temperature of heating devices in the switch power supply rises with the increasing of the working time of the switch power supply, when the temperature of the heating devices in the switch power supply exceeds 40 DEG C, vinegar in an annular air bag boils to generate gas to allow the annular air bag to be expanded, a radial pushing force is applied to fan blades connected on the annular air bag to allow the fan blade portions located in a cavity to pass through a through groove to extend to the external portion of the housing, the fan blades exposed out of the housing become longer, and the air volume generated by the heat dissipation fan is increased; 2) the temperature of heating devices is reduced, the annular air bag starts contraction, the fan blades exposed out of the housing become shorter, and the air volume generated by the heat dissipation fan is decreased; 3) the switch power supply stops running, the heat dissipation fan stops rotation, the air in the annular air bag is cooled to form liquid, the annular air bag is contracted, and the fan blades are reset. The heat dissipation method of the switch power supply module realizes regulation of air volume in the heat dissipation process through the physical effect so as to reduce the measurement errors.

An air purifying device provided with: a body case having an air suction opening and an air discharge opening; an air purifying section provided in the body case; and an air sending section provided in an airflow path for sucking indoor air into the body case from the air suction opening through the air purifying section and discharging the air indoors from the air discharge opening. The air suction opening is constructed from a first air suction opening provided in at least one side face of the body case, and also from a second air suction opening provided in the lower part of the front face of the body case. A front decorative plate is provided to the front face of the body case, and, out of the area of opening of the first and second air suction openings, the area of opening of at least the second air suction opening can be changed by moving up and down the front decorative plate.

The invention relates to the field of cooking wookware, and discloses a cooking wookware and a method for adjusting steam output amount of the cooking wookware. The cooking wookware comprises a steamoutput amount adjusting assembly (20) and a pot cover assembly (10) with a first air outlet hole (11). The steam output amount adjusting assembly (20) comprises an air blocking piece (21) which blocksthe first air outlet hole (11), a solenoid coil (22) used to drive the air blocking piece (21) to move to adjust area of the first air outlet hole (11) blocked by the air blocking piece (21), and a fixing frame (23) used to mount the solenoid coil (22). According to actual needs, through powering on the solenoid coil, the solenoid coil generates magnetic forces on the air blocking piece to move the air blocking piece, so as to adjust area of the first air outlet hole blocked by the air blocking piece. Thus, an objective of adjusting steam output amount is achieved, and cooked meals are ensured to reach mouthfeel users want.

The invention provides a portable moxibustion gun with moxa smoke purification function, which belongs to the technical field of moxibustion equipment manufacturing, including: a moxa stick combustion chamber, a moxa smoke purification chamber and a handle device with an electronic module, a display module and a battery; The room is equipped with a metal mesh cover, air intake holes, fastening screws, moxa stick fixtures, hot spot conversion semiconductor materials, infrared emitters, moxa stick propeller thimbles and triggers; the clean room is a tubular structure, equipped with a water-containing sponge layer, a fan and the moxa smoke filter layer; the handle device is provided with an electronic module, a display module and a battery; the combustion chamber is connected to the clean room and connected to the handle device through a lock; the clean room is connected to the handle device through a card slot. The clean room of the invention can purify the moxa smoke, and at the same time, the thermoelectric conversion semiconductor material on the inner wall of the combustion chamber can recycle the residual heat generated by the burning of the moxa sticks.

The invention relates to a refrigerator with the functions of continuous freshness-preservation and air purification. The refrigerator comprises a refrigerator cabinet which is internally provided with an air return device and connected with an air purification device. A first air outlet and a second air outlet are formed in the air purification device. A first solenoid valve is arranged on the first air outlet and communicates with the air return device through a first pipeline; a second solenoid valve is arranged on the second air outlet and communicates with the exterior of the air purification device; the first solenoid valve and the second solenoid valve are electrically connected with a controller; and the controller controls the first solenoid valve and the second solenoid valve to open and close correspondingly. According to the refrigerator with the functions of continuous freshness-preservation and air purification, the air purification device is arranged on the refrigerator cabinet, air flowing direction is controlled by controlling the air purification device through the controller, and the function that not only can air in the refrigerator cabinet be purified, but also the indoor environment can be purified is achieved.

The invention relates to a device for reducing the cold air doping rate of hot primary air. The device comprises a blower, an air preheating device and a combustor, wherein the blower, the air preheating device and the combustor are sequentially connected in the air inlet direction. The air preheating device is connected with the combustor through a primary air pipe. The device for reducing the cold air doping rate of the hot primary air is characterized in that a bypass air channel is arranged, the initial end and the tail end of the bypass air channel are connected to different positions of the primary air pipe, the flow direction of the inner air of the bypass air channel is identical with the flow direction of the inner air of the primary air pipe and an inlet closing baffle, a hot primary air cooler, an outlet closing baffle, a pressurizing fan and an air channel compensator are sequentially arranged on the bypass air channel in the air inlet direction. A regulating baffle and a first closing baffle are sequentially arranged on the part, located between the initial end and the tail end of the bypass air channel, of the primary air pipe in the air inlet direction. A pulverized coal feeding machine is arranged behind the tail end, located on the bypass air channel, on the primary air pipe in a connected mode. The device for reducing the cold air doping rate of the hot primary air has the advantages of being simple in structure, convenient to use, low in cost of coal in generating electricity and capable of improving the efficiency of a boiler and saving the operation cost.

The invention provides a dust collector handle adjusting structure and a dust collector. The dust collector handle adjusting structure comprises a handle main body, a face cover and an adjusting cover, wherein a first air duct and a through hole, which communicates with the first air duct, are formed in the handle main body, and the handle is provided with a holding portion; the face cover is connected to the handle main body; the face cover is arranged in a mode of being close to the holding portion, and a notch is formed in the face cover; the adjusting cover is sandwiched between the handle main body and the face cover; the adjusting cover can slide in the notch, so that the adjusting cover has at least two working positions; in the first working position, the through hole is sealed by virtue of the adjusting cover; and in the second working position, the through hole is opened by virtue of the adjusting cover at least partially. According to the dust collector handle adjusting structure and the dust collector provided by the invention, an air quantity can be conveniently adjusted and a relatively good sealing performance can be guaranteed.

The present invention relates to a drive control method for driving front panel of air conditioner and its device. According to the refrigerating / heating operation or air purification operation and dehumidification operation it can control opening and closing of the front panel. Said invention not only can effectively refrigerator or heat the space required for conditioning air, but also can purify the space required for air conditioning or make dehumidification.

The invention discloses an Internet-based server cabinet for database management, which comprises a main cabinet body. Openings are formed in the front side and the rear side of the main cabinet body, one side of each opening is connected with a front side door and a rear side door through hinges, and an air inlet pipe is fixedly installed on the outer side of the rear side door; an air cooler is fixedly installed on the side close to the bottom end of the air inlet pipe, an air outlet end opening of the air cooler is communicated with the air inlet pipe, multiple sets of air outlet cavities are formed in the inner side of the rear side door, air outlets are formed in one sides of the air outlet cavities, and multiple sets of air baffles are installed in the air outlets. According to the Internet-based server cabinet for database management, servers at different positions can be independently cooled through the multiple sets of air outlet cavities in the inner side of the rear side door, air volume adjustment can be achieved through cooperative use of an air baffle in an air outlet and an electromagnetic push rod, therefore, the optimal heat dissipation effect on each server is guaranteed, the energy utilization rate is high, and more energy conservation and environmental protection are achieved.

The invention discloses integrated protective clothing, belonging to the technical field of protective clothing. The integrated protective clothing comprises a protective clothing body, wherein the top of the protective clothing body is connected with a transparent hood; a breather valve is mounted on one side in front of the hood; the protective clothing body comprises a sealing strip, an elasticwaist band and an air inlet; the air inlet is located at a position 100 mm above the elastic waist band; waist taps are arranged on the front side and the rear side of the waist of the protective clothing body; the elastic waist band is installed in the four waist taps; the elastic waist band is of an elastic structure; and functional waist tabs are installed on the front side of the elastic waist band. When the protective clothing is used, the protective property of the protective clothing can be enhanced, bacteria and saliva of a patient can be filtered, ventilation in the protective clothing body can be enhanced, the back of a doctor is not prone to heat generating or sweating, the somatogenic requirements of the doctor can be met in the use process of the protective clothing by the doctor, and the protective clothing is safer and more convenient to use.

The invention discloses a bun steaming furnace, relates to the field of bun steaming furnaces, and solves the problems that the working efficiency is low, the energy consumption is relatively high, and the steam output cannot be adjusted. The bun steaming furnace is technically characterized by comprising a base and a heating mechanism arranged on the base, wherein a plurality of circular vent holes are formed in the upper surface of the base; the heating mechanism comprises a heating part, an aeration disc, a pump body and liquid; and the base is a cavity mechanism, the liquid is placed in the base, the heating part is installed in the base, the aeration disc is installed on the inner lower surface of the base, the pump body is arranged on one side of the base, and the pump body is connected with the aeration disc through a guide pipe.

The invention discloses a desulfurization spray tower, and relates to the field of spray towers. The key points of the technical scheme are as follows: a waste gas pipe is arrange at the bottom of thespray tower; a cloth balloon is arranged at one end, extending into the spray tower, of the waste gas pipe, a plurality of air outlets are formed in the cloth balloon, elastic ropes are arranged on two sides of each of the air outlets and on the outer wall of the cloth balloon, and one ends, away from the cloth balloon, of the elastic ropes located on two sides of the same air outlet are connected through a sealing plug. When the elastic ropes are in a natural state, the sealing plugs seal the air outlets, and guide plates extending into the air outlets are arranged at one ends, facing the air outlets, of the sealing plugs, and are smaller than the air outlets. Uniformity of waste gas entering the spray tower is improved, the waste gas reacts with spray liquid more fully, and the waste gas treatment efficiency is improved.

The production process of regenerated feed from kitchen wastes includes the technological steps of: feeding kitchen wastes as material into material bin with spiral pump; conveying the material with a scraper conveyer and dewatering in vacuum press filter; conveying with rubber belt conveyer, manually sorting and magnetically sorting to eliminate impurity; crushing in crusher with hammering and shearing function; conveying with spiral conveyer and high temperature sterilizing and drying in a stove; re-crushing in one other crusher; pelletizing or puffing; and final packing. The present invention can convert kitchen wastes with water content as high as 85 % into concentrated feed for animal and with rich nutrients and water content less than 14 %.

The invention discloses a pipeline part used for conveying carbon dioxide gas, and particularly relates to a carbon dioxide gas transfer device. The carbon dioxide gas transfer device is arranged between a carbon dioxide generator and a water spraying pipeline, and comprises a transfer device body, a heating unit and an air supply unit, wherein the heating unit and the air supply unit are arranged in the transfer device body. A gas inlet connected with the carbon dioxide generator and a gas outlet connected with the water spraying pipeline are formed in the transfer device body. The air supply unit supplies air to the gas outlet. A gas guide urn is fixedly arranged in the transfer device body. Two opposite ports are arranged on the gas guide urn. One port is an inlet connected with the gas inlet through a gas guide pipe, and the other port is an outlet facing the gas outlet. A cover body used for sealing and covering the outlet is arranged on the gas guide urn. A set of flat gas outlet holes are formed in the circumferential side of the cover body. The carbon dioxide gas transfer device overcomes the technical defect that in the prior art, pipe blockage and influences on growth of part of plants exist, and the carbon dioxide gas transfer device used for providing dry ice sublimation is provided.

The invention relates to an underfeed and reverse-burning type burner having the advantages of more complete fuel burning and cleaner exhausted flue gas. The underfeed and reverse-burning type burner comprises a box body, fuel conveyors and a blower device, wherein a grate is arranged in the box body; fuel troughs are arranged in the middle of the grate; an air chamber is formed by space between the outer side surface of the grate and the inner side surface of the box body; an annular partition board is further arranged in the box body, and the upper surface of the partition board makes contact with the outer side surface of the grate; the part, located above the top surface of the partition board, of the grate is the upper grate part, and the part, located below the top surface of the partition board, of the grate is the lower grate part; the air chamber is divided into an upper air chamber and a lower air chamber by the partition board, the upper air chamber is communicated with the upper grate part, and the lower air chamber is communicated with the lower grate part; an output end of each fuel conveyor extends into the corresponding fuel trough; the blower device comprises a blower and an air delivery pipe communicated with an outlet of the blower, an upper air channel and a lower air channel isolated from each other are formed in the air delivery pipe, the upper air channel is communicated with the upper air chamber, and the lower air channel is communicated with the lower air chamber.

The invention discloses a device for preventing ash from being accumulated in a rear smoke channel of a coal-fired boiler subjected to denitration transformation. The device comprises an economizer outlet vertical smoke channel, an air supply pipeline, a hot primary air pipe, an air preheater and an ash bucket arranged at the tail end of the economizer outlet vertical smoke channel. The hot primary air pipe is externally connected with a bypass air channel, and the bypass air channel communicates with the economizer outlet vertical smoke channel through the air supply pipeline. The hot primaryair pipe and an inlet smoke channel are connected with the air preheater. According to the device, the hot primary air pipe on an outlet of the air preheater is externally connected with the bypass air pipeline, hot primary air is sprayed in through a rectangular spraying opening of a smoke channel at the position, prone to ash accumulation, of an outlet of an economizer, the gas flow speed of adry loose ash accumulating area can be increased due to the sprayed hot primary air, gas force carries dry ash to the ash bucket on a subsequent smoke channel, and therefore ash accumulation on a bendbetween the vertical section of the outlet of the economizer and the horizontal section can be avoided. The device is small in structural size, can be easily mounted in narrow space, and is safe andreliable in performance and small in construction amount and investment.

The invention discloses an adjustable granary ventilation opening device, and relates to the technical field of granary ventilation equipment. The adjustable granary ventilation opening device comprises a mounting outer cylinder, an adjusting sleeve ring and a second support, a first support is arranged on the inner side wall of the other end of the mounting outer cylinder, a plurality of rotatingshafts are symmetrically arranged on the first support and fixedly connected with fan blades, the adjusting sleeve ring is rotatably connected with one end of the mounting outer cylinder, driving gears are arranged on the inner side wall of the adjusting sleeve ring, the second support is arranged on the inner side wall of one end of the mounting outer cylinder, a plurality of fixing seats are symmetrically arranged on the second support and rotatably connected with nuts, driven gears are fixedly connected onto the nuts and internally engaged with the driving gears, lead screws are arranged in the nuts in a matched manner, a shaft ejector sleeve is arranged at one end of each lead screw, two pull rods are rotatably connected onto each shaft ejector sleeve, and one end of each pull rod isrotatably connected onto the inner side face of the corresponding fan blade. The fan blades are rotatably adjusted by gear components, lead screw components and the like, and the air quantity of an air opening is adjusted.

The invention relates to the technical field of computer fans, and discloses a computer cooling fan capable of adjusting the air volume for intelligent manufacturing. The computer cooling fan comprises a driving motor, a sleeving mechanism is mounted on a driving shaft of the driving motor, connecting mechanisms are uniformly distributed on the sleeving mechanism, fan blades are fixedly mounted on the connecting mechanisms, adjusting mechanisms are further mounted between the sleeving mechanism and the connecting mechanisms, and cleanings mechanism are mounted at the top ends of the fan blades and connected with driving mechanisms through transmission mechanisms. According to the computer cooling fan, it can be guaranteed that the angles of the fan blades can be adjusted through the sleeving mechanism and the connecting mechanisms, the angles of the fan blades are adjusted through the adjusting mechanisms, the fan blades can be driven by different air volumes at the same rotating speed, and the air volume of the fan can be adjusted according to the temperature of a computer case; besides, the cleaning mechanisms are arranged to conduct automatic dust removal operation on the fan blades, dust accumulation is prevented from affecting the working effect of the fan, and the practicability is high.

The invention provides an intelligent heat dissipation system based on a variable-angle hydraulic fan and a control scheme and relates to an intelligent heat dissipation system for vehicle heat dissipation and a control scheme. The intelligent heat dissipation system based on the variable-angle hydraulic fan comprises one hydraulic fan and further comprises a sensing device for monitoring water temperature, oil temperature, rotating speed and a pressure signal, a sensing signal processing control unit and a hydraulic execution device controlled by the control unit. The intelligent heat dissipation system based on the variable-angle hydraulic fan can control the hydraulic fan to complete an stepless variable-angle action based on the sensing signal received by the control unit, adjusts air volume according to the heat dissipation demand, is simple, reliable and easy to achieve and has the advantages of saving energy and reducing consumption.

The invention relates to the technical field of soil sampling and further discloses an air-drying treatment device after soil sampling. The device comprises a case, wherein a first connecting rod is rotationally connected with the upper left side of the case, a first spring is fixedly connected with the lower left side of the first connecting rod, a second connecting rod is rotationally connectedwith the lower side of the first connecting rod, a first connecting rod is fixedly connected with the left side of the second connecting rod, and a rotating piece is rotationally connected with the right side of the first connecting rod. The air-drying treatment device after soil sampling is advantaged in that through air draft, then, the soil in the air drying cavity is subjected to air drying treatment, an operator holds the first connecting rod and the first connecting rod by hands, the second connecting rods are separated from the corresponding inclined clamping grooves, and then the firstconnecting rods are rotated up and down, so the opening size between the rotating pieces is adjusted, the air volume is adjusted, and the device achieves the effects that the air volume can be adjusted and air-dried soil of different degrees can be obtained.