83results about How to "Stable wind speed" patented technology

A wind powered generator is described that may take advantage of the strong wind present at higher altitudes above terrain than can feasibly be reached by traditional tower mounted wind generators. It makes use of a combination of lift sources. The generator comprises an envelope filled with a lifting gas that enables the system to rise in little or no wind, and wings that provide additional lift when there is wind, to thereby prevent the wind from blowing the tethered generator to the ground. The airborne wind powered generator is able to both rise aloft and land unattended. Power is extracted from the wind by means of turbine rotors that drive electric generators.

The invention discloses an efficient cooling air conditioner system of a rack-mounted server cabinet. The system comprises a refrigerating module and a cabinet body provided with an air inlet. The refrigerating module conveys cold air to the cabinet body through the air inlet, a partition board is arranged in the cabinet body, one side of the partition board is an air flue, the other side of the partition board is provided with a containing space used for containing a server, the cross section of the air flue is gradually reduced in the flow direction of the air, the partition board is provided with a plurality of air inlets in the flow direction of the air, and the air inlets are provided with arc-shaped flow guide plates. By means of the partition board, the cross section of the air flue is gradually reduced in the flow direction of the air, so that the cold air entering air gaps is equal in speed and amount, and uniform heat dissipation is achieved. Due to the facts that a sound-insulating material layer is arranged on a shell, arc-shaped transition plates are arranged on the corners of the cabinet body and the arc-shaped flow guide plates are arranged on the air inlets, noise is lowered, and the system is low in noise during work.

The invention discloses a heat dissipation control method, device and system for an electrical cabinet. The method comprises the steps: predicting and obtaining the generated heat in the electrical cabinet; determining corresponding dissipated heat according to the obtained generated heat; and enabling the difference between the generated heat and the dissipated heat to be within a preset range through controlling the rotating sped of a cooling fan. The method solves technical problems that the control is lagged and the temperature is liable to fluctuate when a conventional electrical cabinet heat dissipation method controls the rotating speed of the cooling fan through detecting the environment temperature of the interior of the electrical cabinet.

The invention discloses a wind power dedusting system for a rolling process of a cigarettes factory. The wind power dedusting system comprises a deduster connecting pipe, a plurality of branch wind pipes and a plurality of pieces of rolling and packing equipment, wherein each piece of rolling and packing equipment is connected with a branch wind pipe; the wind power dedusting system also comprises a wind compensating pipe with a wind compensating silencer and a main wind pipe; the deduster connecting pipe and the wind compensating pipe are respectively communicated with the main wind pipe; the main wind pipe is respectively communicated with each branch wind pipe through a pipe collector; and the wind compensating pipe is provided with a control valve which is used for automatically switching on to compensate wind when a certain branch wind pipe is stopped. The wind power dedusting system can concentrate wind power for supply, and ensure stable wind quantity, wind pressure and wind speed; the pipeline design is more standardized and unified; and the effective operability and the yield of the rolling and packing equipment are improved, the production cost is reduced and the service environment of workers is improved.

The invention discloses a comprehensive environment wind tunnel simulation device, which is applied to the field of environmental wind tunnel simulation devices. The comprehensive environment wind tunnel simulation device comprises a power section, a snowflake generation section and a test section which are sequentially arranged, wherein the power section is internally provided with a fan; the front end and the rear end of the snowflake generation section are provided with a liquid nitrogen spraying ring and a water mist spraying ring with the inner side being provided with a plurality of nozzles in the circumferential direction, the liquid nitrogen spraying ring is connected with a liquid nitrogen source pipe, and the water mist spraying ring is connected with a water source pipe througha water mist generator; the test section is internally provided with a platform for bearing an experimental model, a vibration generator is connected below the platform, and a raining device is arranged above the platform; and the raining device is connected with a water source through a pressure pump. There are wind tunnels which separately simulate a blizzard environment, a rainstorm environmentor an earthquake environment at present, but a wind tunnel test system capable of simulating the comprehensive environment is unavailable, so that wind tunnel simulation cannot be performed on an extreme but actually existing environment in which blizzard earthquake and rainstorm earthquake interact. The comprehensive environment wind tunnel simulation device can solve the problem and has important practical significance and theoretical research values.

The invention relates to a method and a device which are used for leading a long wind pipe to uniformly send and return the wind. The proportional cross-section area size of the rated shunt air quantity of each step of bypass branch pipes is calculated according to the quantity of the three-way wind valves arranged on the long wind pipe and the cross-section area size of the total wind pipe of the initial three-way wind valve; furthermore, the proportional cross-section area size is taken as the basis of the shunting of the wind quantity shunt valve with the shunt adjusting function and the gradual contraction quantity of the cross-section area size of all levels of valves; therefore, leading the wind speed and the dynamic pressure in the long wind pipe to trend to be consistent and the wind-obtaining quantity of all bypass branch pipes to trend to be close, and achieving the object of uniformly sending and returning the wind by the long wind pipe. The device consists of a long wind pipe and bypass branch pipes; the long wind pipe is connected by a plurality of wind quantity shunt three-way adjusting valves or modified three-way wind valves which have the function of shunt adjustment, ensure the airflow speed and the dynamic pressure in the long wind pipe to be approximate to each other and lead all bypass branch pipes to obtain the basically approximate airflow wind quantity. The method is reliable, the device has scientific and reasonable structure, the difficult problem that the existing long wind pipe can not realize the uniform sending and returning of the wind for a long time is solved, and the method and the device have extremely strong practicability.

The invention discloses a wind-speed adjusting device on tobacco processing equipment, relates to a wind-speed adjusting device that can stabilize the transmission of tobacco in pipeline, which belongs to field of tobacco machinery. The invention provides the wind-speed adjusting device on the tobacco processing equipment which can master the work parameter of a tobacco feeding port, a tobacco discharging port of tobacco-collecting boxes of various cigarette making machines in real time, thereby realizing high-precision control of wind speed and improvement of tobacco quality. The wind-speed adjusting device is arranged at a tobacco transmission tube and a de-dusting tube at both ends of the tobacco-collecting box of the tobacco processing equipment, comprising a controller, a wind-leakage detection device, a wind-speed instrument, a flowmeter, and a pneumatic adjusting butterfly valve, wherein, the wind-leakage detection device is arranged on the tobacco transmission tube, the wind-speed instrument is arranged on the tobacco-collecting box, the flow meter and the pneumatic adjusting butterfly valve are arranged on the de-dusting tube, the wind-leakage detection device, the wind-speed instrument, the flow meter and the pneumatic adjusting butterfly valve are connected with the controller. The invention has advantages of simple structure, high adjusting precision.

The invention discloses an indoor unit of an air conditioner. The indoor unit of the air conditioner comprises a shell, a heat exchanger and a cross-flow fan, the heat exchanger and the cross-flow fan are mounted in the shell, and the cross-flow fan comprises a cross-flow wind wheel and a volute which are matched with each other; the volute comprises a front volute tongue which is formed into the first lateral surface of a diffusion part of the cross-flow fan and a rear volute which is formed into the second lateral surface of the diffusion part, wherein the second lateral surface is opposite to the first lateral surface, the diffusion part is downward, an air outlet is formed in the lower lateral surface of the shell, and a return air inlet is formed in each of the rear lateral surface and / or upper lateral surface of the shell; the minimum clearance between the front volute tongue and the rear volute is D, and D is more than or equal to 40 millimeters and less than or equal to 75 millimeters. According to the indoor unit of the air conditioner, the air outlet is formed in the lower lateral surface, the return air inlet is formed in each of the rear lateral surface and / or upper lateral surface, so that a room can be partially ceiled, and the air current circulation in the room is improved; and in addition, the minimum clearance D between the front volute tongue and the rear volute is optimized to regulate the size of the air outlet, the air outlet speed is optimized, and the noise is lowered.

The present invention discloses a testing method for dynamic model parameters of a wind power plant, wherein under testing conditions including stable running of wind turbine generators and reactive-load compensation equipment, stable wind speed between a cut-in wind speed and a rated wind speed, and the wind power plant output smaller than a rated output, finishes a wind speed transient disturbance test, a wind power plant unit tripping and inputting disturbance test, a wind power plant power change test, a disturbance test for reactive-load compensation equipment of the wind power plant, a tripping disturbance test for hydroelectric power plant and thermal power plant near the wind power plant and a manual single-phase ground short circuit test at the outgoing line part of the wind power plant, and records running curves of the wind power plant under each condition to finish the parameter test. The present invention realizes the advantage of providing precise measurement data for the stability analysis of an electric power system and the production dispatching of a power grid.

The invention discloses an array type wave energy electricity generating system and belongs to the technical field of wave energy electricity generating devices. The system comprises floats, air chambers, air delivery pipelines, pistons, steel frame structures, an offshore electricity generating platform, air storage chambers, turbine generators and check valves, wherein the air delivery pipelines, the air chambers and the like are fixed to a sea surface through the steel frame structure, the floats are connected with the pistons in the air chambers, two pipeline openings are separately formed in the upper and lower surfaces of the air chambers, and one valves are separately arranged in the pipelines; the upper and lower surface of each air chamber are separately provided with one pipeline, and the pipelines communicate with the air delivery pipelines, forming an array; and the air delivery pipelines are connected with the air storage chambers, and the air storage chambers are connected with the turbine generators. The floats are driven to move up and down with the fluctuation of seawater, and accordingly, the pistons compress air up and down. Wind formed in the pipelines enters the air storage chambers and is stored in the air storage chambers. After certain pressure intensity is reached in the air storage chambers, air is discharged out, and the air turbines are pushed to generate electricity. The plurality of air chambers in the invention form the cluster array and are convenient to assemble and disassemble. The array type wave energy electricity generating system has the advantages of being high in electricity generating efficiency, stable in electricity generation and the like.

The invention discloses a constant temperature-constant humidity laboratory, which belongs to the field of laboratories. A workshop, an equipment room, an air feeding bin and an air mixing bin are arranged in the laboratory, the top of the workshop is provided with a porous plate suspended ceiling, an air feeding pipe is arranged in the air feeding bin, a fresh air hole introduces fresh air into the air mixing bin by a fresh air pipeline, an air conditioner unit is arranged in the equipment room, the lower part of the air mixing bin is connected to the air conditioner unit, the air conditioner unit is connected to the air feeding pipe by an air conditioner auxiliary electric heater, a plenum chamber and a humidifier, air returning upright columns are arranged in the workshop, the lower parts of the air returning upright columns are provided with air returning holes, and the air returning upright columns are connected to the air mixing bin by air returning pipelines. The constant temperature-constant humidity laboratory also comprises an intelligent control system having a PLC. Compared with the prior art, the constant temperature-constant humidity laboratory has the characteristics of high airflow circulation strength, stable wind speed, uniform temperature and humidity, no dust accumulation, good stability, capability of meeting a fresh air volume demand of workers, high disturbance resistance, high control precision and direct and visible temperature and humidity changes in the laboratory.

The invention belongs to the technical field of tobacco processing, and particularly relates to a curing method for the flue-cured tobacco variety K326. The curing method includes respectively curing tobacco leaves of the lower portion, the middle portion and the upper portion of the tobacco plant K326 planted in purple soil in different curing barns, slowly rising temperature of the insides of the curing barns at the tobacco leaf yellowing age, carrying out variable-frequency regulation and control of circulating fans used at different curing stages including the yellowing stage, the leaf drying stage and the stem drying stage and particularly dividing the whole curing stage into ten stages; cooling slowly at the yellowing stage with the temperature controlled below 39 DEG C; preserving heat at medium and high temperature for 12 hours and preserving heat at the middle and later periods of the leaf drying stage for 12 hours so as to obtain the flue-cured tobacco variety K326. The flue-cured tobacco variety K326 has high appearance quality, internal chemical components of the tobacco leaves are coordinated, sensory smoking quality of the tobacco leaves is improved, and accordingly economic benefit is improved.

The invention discloses a cooling caravan utilizing combination of evaporative cooling and wind-solar hybrid power generation technologies. The cooling caravan comprises a rest zone and an indirect-direct evaporative cooling unit. A secondary vent is arranged on the top wall of the indirect-direct evaporative cooling unit, and a wind power generator unit and a solar panel are respectively arranged on two sides of the secondary vent. A sunshade plate is arranged on the top of the rest zone of the cooling caravan horizontally, and one end of the sunshade plate is connected with the top wall of the indirect-direct evaporative cooling unit. Multiple rows of seats for rest are arranged in the rest zone of the cooling caravan, each row of the seats for rest is connected with the indirect-direct evaporative cooling unit through a cool water pipe. A primary-air duct connected with the indirect-direct evaporative cooling unit is arranged above the seats for rest horizontally, and provided with radiator air supply outlets. Outdoor regenerative solar energy and wind energy are combined with the evaporative cooling technology, so that temperature can be reduced effectively while energy consumption can be saved.

The invention discloses an insert high-precision stamping and bending die. A hydraulic driving rod is fixedly installed at the bottom of a stamping machine, wherein the bottom end of the hydraulic driving rod is fixedly connected with a lifting plate, a stamping block is arranged at the middle portion of the bottom end of the lifting plate, and a stamping die cavity is formed in the position, corresponding to the stamping block, of the top of a machining platform. According to the insert high-precision stamping and bending die, the hydraulic driving rod is used for driving the lifting plate and the stamping block to move downwards, then the stamping block can stamp and cut workpieces so that the workpieces can enter the stamping die cavity, metal contact pins at one sides of the workpieces are bent, part of sweeps can fall off in the stamping processes, a movable baffle plays a role in blocking the bent workpieces, thus sweeps and the workpieces all stay in the stamping die cavity, after the workpieces are taken away, an electric telescopic rod drives the movable baffle to slide towards the interior of a movable groove, and a cleaning brush plays a cleaning role on the surface of the movable baffle, so that the surface of the movable baffle is kept clean, and the sweeps remaining on the surface of the movable baffle can be swept and fall into a collecting box to be stored.

The invention belongs to the technical field of tobacco processing, and particularly relates to a flue-curing method for flue-cured tobacco NC87 tobacco leaves. The method comprises the steps that purple soil is planted to obtain lower tobacco leaves, middle tobacco leaves and upper tobacco leaves of NC87 to be flue-cured in different curing barns separately, the temperature is increased slowly inthe tobacco leaf yellowing period inside the curing barns, frequency conversion control is performed on a circulating fan adopted in different flue-curing stages of the yellowing period, the fixationperiod and the stem-drying period, and the whole flue-curing stage is divided into ten small stages; meanwhile, the temperature is increased at low speed in the yellowing period, and the temperatureof the yellowing period is controlled to be 389 DEG C or below; the high and medium temperature yellowing steady temperature period is prolonged by 12 h, and the fixation middle and later period steady temperature period is prolonged by 12 h; finally, the NC87 obtained after flue-curing is superior in appearance and quality, chemical components inside the tobacco leaves can be coordinated, the tobacco leaf sensory evaluation quality is improved, and economic benefits are improved.

The invention discloses an offshore seismic environment wind tunnel simulating device. The offshore seismic environment wind tunnel simulating device is applied to the field of environment wind tunnelsimulating devices. The offshore seismic environment wind tunnel simulating device comprises a wind power generation section and a testing section, wherein the wind power generation section and the testing section communicate with each other; a testing model is placed in the testing section; the testing section is divided into a clearance layer, a seawater layer and a sea mud layer from top to bottom; the clearance layer communicates with the wind power generation section; the seawater layer is provided with a sea wave generator on a side wall of an inlet of the testing section; and a vibration generator which is connected with the testing model is arranged at the bottom of the sea mud layer. The invention mainly solves the problems that an existing wind tunnel experimental device for anenvironment is lack of a wind tunnel device capable of simulating offshore seismic and a wind wave environment along with the offshore seismic, and it is limited to numerical simulation analysis basedon classical assumption at present. By the offshore seismic environment wind tunnel simulating device, influence of the offshore seismic and the wind wave environment conditions along with the offshore seismic to an offshore drilling platform is researched in a simulated manner, so that a reasonable offshore seismic resistant design is proposed, the safety of the offshore drilling platform in anoffshore seismic environment is improved, and the offshore seismic environment wind tunnel simulating device has great practical significance and theoretical research value.

A new energy-gathering wind power generation device that adopts the dynamic control of a split-flow wind regulating device, including two wind collecting walls (1) connected with a steel-structured air outlet frame (4) to form a trumpet-shaped wind collecting air duct (2 ) to form a wind energy gathering device, so that the wind speed at the position of the air duct outlet frame (4) is increased, and several high-power wind turbines (6) with miniaturized typhoon wheels are installed on the air duct outlet frame (4). Multi-layer round hole type split flow automatic wind regulator (7) is installed on the wind wall (1), each round hole type split flow automatic wind regulator (7) is connected by a round hole (9) and N folding Sector blade (10) and driving motor (12) constitute. The dynamic control of the automatic wind regulator (7) and the operation of the fixed-pitch two-speed asynchronous generator form a unified cooperative control system. Control and stabilize the operating wind speed of wind turbines, improve the efficiency of wind turbines, increase power generation, and use wind energy more effectively.

The invention belongs to the technical field of tobacco processing, and particularly relates to a flue-curing method for flue-cured tobacco NC55 tobacco leaves. The method comprises the steps that brunisolic soil is planted to obtain lower tobacco leaves, middle tobacco leaves and upper tobacco leaves of NC55 to be flue-cured in different curing barns separately, the temperature is increased slowly in the tobacco leaf yellowing period inside the curing barns, frequency conversion control is performed on a circulating fan adopted in different flue-curing stages of the yellowing period, the fixation period and the stem-drying period, and the whole flue-curing stage is divided into ten small stages; meanwhile, the temperature is increased at low speed in the yellowing period, and the temperature of the yellowing period is controlled to be 38 DEG C or below; the high and medium temperature yellowing steady temperature period is prolonged by 12 h, and the fixation middle and later period steady temperature period is prolonged by 12 h; finally, the NC55 obtained after flue-curing is superior in appearance and quality, chemical components inside the tobacco leaves can be coordinated, thetobacco leaf sensory evaluation quality is improved, and economic benefits are improved.

The invention discloses an air supply system of a rail vehicle carriage. The air supply system comprises a carriage air supply passage arranged above a vehicle in-built roof. An air outlet of the carriage air supply passage is provided with a longitudinal beam section, the longitudinal beam section is internally provided with an air cavity, and a plurality of section air outlets are formed in the longitudinal beam section and located below the vehicle in-built roof. According to the air supply system, air is horizontally blown out from the top of a carriage, great airflow cannot exist in the carriage, and the comfort level is high in the carriage; and the air is buffered in the air cavity before being blown into the carriage, and the air speed is stable.

A closed loop type wind power generation system is characterized by comprising an annular air barrel (1), at least one air blower array (2) and a plurality of wind driven generators (3). The air blower arrays (2) are arranged in the annular air barrel and are used for enabling air in the annular air barrel to achieve single-direction circulating flow and generate wind in the annular air cylinder; wherein the wind can drive blades of the wind driven generators to rotate. The pressure and speed of the wind are maintained to be within the set proportionality range under the action of the air blower arrays so as to ensure the power generation efficiency and stability of the wind driven generators (3). The wind driven generators (3) are arranged in the annular air barrel (1) and are driven by the blades to rotate to generate power. The closed loop type wind power generation system has the advantages of being capable of continuously generating power, and being clean and environmentally-friendly.

The invention discloses a circular blowing polyester spinning cooling device. The device is composed of two parts, namely a blowing device and air-conditioning systems; the blowing device comprises a frame, a lifting cylinder, a lifting rod, a first air inlet pipe, a second air inlet pipe, a first air duct, a second air duct and a guide duct; a first annular cavity is arranged outside the first air duct, while a second annular cavity is arranged outside the second air duct and a third annular cavity is arranged outside the third guide duct; a first annular air equalizing cover is arranged outside the first annular cavity, while a second annular air equalizing cover is arranged outside the third annular cavity; the inlet pipeline of the first annular air equalizing cover is communicated with the first air inlet pipe; the inlet pipeline of the second annular air equalizing cover is communicated with the second air inlet pipe; the first air-conditioning system provides the first air inlet pipe with cooling air, while the second air-conditioning system provides the second air inlet pipe with cooling air. According to the circular blowing polyester spinning cooling device, a circular blowing cooling manner is adopted, air can be fed in each direction so that nascent fibers can be evenly cooled in each direction, and meanwhile, the upper and lower layers of circular blowing are evener, and the fiber cooling effect is good.

The embodiment of the invention discloses a movable efficient environment-friendly grain impurity cleaning device. The movable efficient environment-friendly grain impurity cleaning device comprises adrum screen, a vibrating screen and a circulating winnowing system which are sequentially arranged from top to bottom; the drum screen comprises a screen drum, a rotating shaft is arranged in the screen drum, and an auger blade is arranged on the rotating shaft; the screen drum is in driving connection with a first rotating motor; the rotating shaft is in driving connection with a second rotatingmotor; and the circulating winnowing system comprises an air suction device, an air blowing device, a filtering device and a dust filtering device, a winnowing channel is arranged between the air suction device and the air blowing device, the air suction device and the air blowing device are connected through the filtering device, and the dust filtering device is connected with the air blowing device through a pressure reducing pipe. In this way, during use, the screen drum and the rotating shaft can rotate, so that the flowing speed of grains in the screen drum is changed, and the utilization rate of the screen surface is increased; and meanwhile, dust pollution of the equipment operation environment during use is avoided through the pressure reducing pipe and the dust filtering device.

The invention belongs to the technical field of tobacco processing, and particularly relates to a flue-curing method for flue-cured tobacco China 100 tobacco leaves. The method comprises the steps that sand soil is planted to obtain lower tobacco leaves, middle tobacco leaves and upper tobacco leaves of China 100 to be flue-cured in different curing barns separately, the temperature is increased slowly in the tobacco leaf yellowing period inside the curing barns, frequency conversion control is performed on a circulating fan adopted in different flue-curing stages of the yellowing period, thefixation period and the stem-drying period, and the whole flue-curing stage is divided into ten small stages; meanwhile, the temperature is increased at low speed in the yellowing period, and the temperature of the yellowing period is controlled to be 39 DEG C or below; the high and medium temperature yellowing steady temperature period is prolonged by 12 h, and the fixation middle and later period steady temperature period is prolonged by 12 h; finally, the China 100 obtained after flue-curing is superior in appearance and quality, chemical components inside the tobacco leaves can be coordinated, the tobacco leaf sensory evaluation quality is improved, and economic benefits are improved.

The invention relates to a speed regulation module of a fan, which comprises a plastic base (1), a pin (2), a printed circuit board (PCB) (3), screws (4), a metal pressing sheet (5), a temperature fuse (6), a metal oxide semiconductor (MOS) pipe (7), a radiator (8) and a fastener (9). The pin (2) is welded on the PCB (3), the temperature fuse (6) is arranged on the MOS pipe (7) through the metal pressing sheet (5), and the metal pressing sheet (5), the temperature fuse (6) and the MOS pipe (7) are fixed in the radiator (8) through the screws (4). The temperature fuse (6) and the MOS pipe (7) are welded on the PCB (3) covered on the radiator (8), and the plastic base (1) is fastened on the radiator (8) through the fastener (9). Compared with the prior art, the speed regulation module of the fan has the advantages of being stable in working, reliable in performance, easy to design and change, low in cost and the like.

The invention relates to a voltage stabilizing test warehouse, which comprises a warehouse body, an induced air segment and an air exhaust segment, wherein one end of the induced air segment is connected with the warehouse body, and the other end is connected with a rear main adjusting butterfly valve of an expander; an air entraining segment by stepless bleeding hot-air in proportion is arranged on the induced air segment, and a current stabilizing segment is arranged at the induced air segment close to the warehouse body; the warehouse body adopts a sealing structure, and is provided with a warehouse door; a temperature sensor is arranged in the warehouse body, and high-temperature-resistant glass observation windows are arranged on two sides of the warehouse body; and a video monitoring system is arranged outside the warehouse body. As a hot air input mechanism, a current stabilizing device, the high-temperature-resistant glass windows and the video monitoring system are arranged, the voltage stabilizing test warehouse can realize the stability of temperature and wind speed in the test process, the flame state of an igniter during low-temperature-point testing is conveniently observed, and accordingly, the whole testing process is monitored.

The invention belongs to the technical field of tobacco processing, and particularly relates to a flue-curing method for flue-cured tobacco Guangdong 98 tobacco leaves. The method comprises the stepsthat purple soil is planted to obtain lower tobacco leaves, middle tobacco leaves and upper tobacco leaves of Guangdong 98 to be flue-cured in different curing barns separately, the temperature is increased slowly in the tobacco leaf yellowing period inside the curing barns, frequency conversion control is performed on a circulating fan adopted in different flue-curing stages of the yellowing period, the fixation period and the stem-drying period, and the whole flue-curing stage is divided into ten small stages; meanwhile, the temperature is increased at low speed in the yellowing period, andthe temperature of the yellowing period is controlled to be 38.5 DEG C or below; the high and medium temperature yellowing steady temperature period is prolonged by 12 h, and the fixation middle and later period steady temperature period is prolonged by 12 h; finally, the Guangdong 98 obtained after flue-curing is superior in appearance and quality, chemical components inside the tobacco leaves can be coordinated, the tobacco leaf sensory evaluation quality is improved, and economic benefits are improved.

Disclosed is a concentrated solar energy wind power generation method. Heat generated by concentrated solar energy is used for heating air below a cylindrical high tower, hot air rises along an inner cavity of the high tower to generate convection, and wind generated through air convection drives a wind driven generator located on a top end opening of the high tower; a heat collection plate is adopted in solar energy concentration, and the heat collection plate is a conical cylinder with openings in the upper portion and the lower portion; an opening in the top is matched with an opening in the lower end of the high tower; the heat collection plate is composed of inner layer glass and outer layer glass, and the position between the inner layer glass and the outer layer glass is vacuum; the outer surface of the inner layer glass is coated with a spectral selective absorbing coating to absorb solar radiation energy; through sun irradiation, photons impact the coating, and the solar energy is converted into heat energy; the gathered solar energy heats air at the bottom of the high tower, the density of the hot air is small, the hot air is light and rises, cold air on the upper layer inside the cylindrical high tower is large in density, the cold air is heavy and sinks, vertical convection of the air is formed, the wind speed inside the higher tower is gradually increased, and the hotter the air is, the stronger the vertical hot convection is, and the larger the wind speed is; and the stable wind speed is formed, and the wind driven generator on the top is driven.

The invention belongs to the technical field of tobacco processing and particularly relates to a method for baking flue-cured tobacco variety Xiangyan No. 3 tobacco. According to the method, lower tobacco, middle tobacco and upper tobacco of Xiangyan No. 3 obtained by planting in sandy soil are separated and baked in different baking chambers, the temperatures during the tobacco yellowing period in the baking chambers rise slowly, circulating fans used at different baking periods at a yellowing period, a color fixation period and a dry rib period are regulated in a frequency conversion mode, and the whole baking period is divided into ten small periods; the temperature rises at a low speed during the yellowing period, and the temperature at the yellowing period is controlled below 39 DEG C; the medium-high temperature yellowing constant temperature is prolonged by 12 hours, and the color fixation middle and later period constant temperature is prolonged by 12 hours; finally is not only the baked Xiangyan No. 3 superior in appearance and quality, but also internal chemical ingredients of the tobacco can be coordinated, the sensory evaluation quality of the tobacco is improved, and economic benefits are improved.

The invention discloses a leafless fan system based on PIC negative feedback regulation and a control method of the leafless fan system. The system comprises a digital tube display module, a key input module pressure sensor module, a bias following module, a serial port AD conversion module, a motor driving module, a fan motor, a pressure reduction module, a control module, a first switch power source and a second switch power source. The first switch power source is used for converting 220 V mains supply into the voltage of 24 V, and the second switch power source is used for converting 220V mains supply into the voltage of 12V. The pressure sensor module, the bias following module, the serial port AD conversion module and the control module are sequentially connected. The first switch power source is connected with the fan motor. The fan motor is connected with the motor driving module. The motor driving module, the digital tube display module, the key input module and the pressure reduction module are all connected with the control module. The second switch power source is connected with the pressure reduction module. According to the leafless fan system and the control method, the negative feedback structure is adopted, and the current output stability is improved effectively.

The invention belongs to the technical field of tobacco processing, and in particular relates to a flue-curing method of tobacco leaves of a flue-cured tobacco variety NC89. The flue-curing method comprises the following steps: separately flue-curing lower tobacco leaves, middle tobacco leaves and upper tobacco leaves of the NC89 obtained by planting in sandy soil in different flue-curing barns; slowly raising the temperature at a yellowing stage of the tobacco leaves in a flue-curing room; carrying out frequency-variable regulation and control by utilizing a circulating draught fan at different flue-curing phases including the yellowing stage, a leaf-drying stage and a stem drying stage, wherein the whole flue-curing phase is divided into 10 sections; meanwhile, slowly raising the temperature at the yellowing stage and controlling the temperature of the yellowing stage to be 39 DEG C or lower; prolonging middle-temperature and high-temperature yellowing stable temperature for 12h; prolonging stable temperature at middle and later stages of the leaf-drying stage for 12h; finally, flue-curing to obtain the NC89. The NC89 has high appearance quality; chemical components in the tobacco leaves can be coordinated; the sensory taste quality of the tobacco leaves is improved, and economic benefits are improved.