352results about How to "Guaranteed adjustment accuracy" patented technology

The invention discloses an electric conical valve type gas flow regulator for solid rocket ramjets. A drive motor is fixed to a connecting box. One end of a coupling is fixedly connected with a shaft of a motor, and a slider is disposed in a slide hole in the other end of the coupling. The slider is fixedly connected with a valve stem through a tension and pressure sensor. A drive nut is fixedly connected to a solid gas generator. The valve stem passes the drive nut and in threaded fit with the drive nut. A conical valve head is fixedly connected with the valve stem in a threaded manner and extends into a spray pipe of the gas generator. The gas generator is in an inner shell structure which is hollow. The valve stem is fitted in the inner shell, and a bushing is fitted between the valve stem and the gas generator. One end of the valve stem, close to the conical valve head, is provided with a peripheral circular groove, and a moving seal is disposed in the circular groove. A pressure sensor is mounted on the rear head of the gas generator. The electric conical valve type gas flow regulator for solid rocket ramjets is simple in structure, small in size, reliable in operation, low in ablation effect, low in cost, and accurately controllable.

The invention discloses an automatic gain control (AGC) optimizing control method of a supercritical unit under coal quality changes, which comprises (1) correcting differential feed-forward of main vapor pressure deviation according to a coal quality correction coefficient British thermal unit (BTU), (2) correcting proportion feed-forward of unit load instructions according to the coal quality correction coefficient BTU, and (3) correcting proportion coefficient K of boiler master control according to the coal quality correction coefficient BTU, overlying the corrected differential feed-forward of the main vapor pressure deviation in the step (1) and the corrected proportion feed-forward of the unit load instructions in the step (2) to serve as new master control feed-forward of the unit boiler, enabling the corrected proportion coefficient K of the boiler master control in the step (3) to serve as an input quantity in a follow-up proportion integration differentiation (PID) step, and achieving output control of the unit boiler master control. The AGC optimizing control method of the supercritical unit under the coal quality changes has the advantages that by optimizing a logic structure of a unit boiler master controller, measures of sectional parameter varying are adopted specific to different coal quality, stability of main vapor pressure of the unit is effectively ensured, and control quality and key performance indexes of the AGC of the supercritical unit are improved.

The invention discloses an oil charging self-adaptive control method and a system for a wet clutch. The method comprises the following steps: a present clutch oil charging state is obtained under a peristalsis working condition; when the present clutch oil charging state is an oil charging control state, a present clutch target pressure is obtained; in a preset adjusting time length, the present clutch target pressure is adjusted to a semi-joint point of the clutch; after the adjustment is finished, in a preset integral control time length, a correction parameter of an oil charging compensation value is obtained according to the relation between a difference value of the semi-joint point and actual pressure of the clutch and the correction parameter of the oil charging compensation value; the oil charging compensation value is corrected according to the correction parameter of the oil charging compensation value to obtain a corrected oil charging compensation value; and target pressure of the clutch is adjusted according to the corrected oil charging compensation value. The method can adjust the target pressure value of the clutch to the semi-joint point in the stated time, and can prevent such problems as vehicle impact or even suppressed flameout of an engine.

The invention discloses a 3D printer printing platform leveling method based on a chasing method and a hydraulic automatic leveling system. The 3D printer printing platform leveling method based on the chasing method and the hydraulic automatic leveling system are used for a large forming-breadth 3D printer. A printing head moves in the directions of an X axis, a Y axis and a Z axis; a distance measuring sensor and the printing head are installed on the same horizontal height, and the distance measuring sensor moves along with the printing head; a measured value of the distance measuring sensor is used for reflecting the relative positions of the printing head and a printing platform; the printing platform and a piston rod of a hydraulic cylinder are connected in the manner of a spherical hinge; the piston rod of the hydraulic cylinder is connected with a fixed supporting frame in the same manner of a spherical hinge; and the displacement of a valve element of a fluid electric proportional direction control valve controls lifting of a piston of the hydraulic cylinder to complete the automatic leveling process of the printing platform. The data output end of the distance measuring sensor is connected with the data input end of a controller, and the data output end of the controller is connected with the fluid electric proportional direction control valve. By means of cooperation of the hydraulic system and the controller, fast, accurate and automatic leveling of the printing platform is completed, the leveling workload of the platform is greatly reduced, and the printing precision is improved.

The invention provides a digital signal processor (DSP)-based intelligent gas sensor checking instrument for mines, comprising a microcontroller unit, a signal conditioning unit, a communication interface unit, a keyboard display unit, a touch control unit and a gas circuit system; and in the invention, the communication connection is carried out on the units and modules of the checking instrument. In the invention, the existing checking instrument structure is improved, and the central processing unit (CPU) technology, the electronic technology and the control technology are taken as main technologies, thereby solving the problems of low speed, low accuracy and high labor intensity of the existing checking instrument and providing services for underground safety production of coal mines.

The invention discloses an automatic spiral hole milling device and a method used for a large workpiece multihole system. The automatic spiral hole milling device comprises an L-shaped support as well as a revolution radius regulating mechanism, a tool rotation speed regulating mechanism and a spiral feeding mechanism which are arranged on the support. The automatic spiral hole milling device disclosed by the invention can be taken as a handheld spiral hole making tool and also can be taken as a terminal executing unit of a robot automatic hole making system, and processing quality and efficiency of the large workpiece multihole system can be greatly improved.

The invention discloses an air suspension height control system and control method. A detection unit of the system is used for detecting current pressure and current height of an air spring, recordingcurrent pressure data and outputting current height data, the current height and first preset height are compared by a control unit, a height adjustment command is outputted if a difference value between the current height and the first preset height exceeds preset height difference range, acquired adjusted height and second preset height are compared by a height adjusting unit, the height of theair spring is increased, the pressure data of the air spring is recorded after the height is increased if the adjusted height is higher than the second preset height, the height of the air spring isreduced, and the pressure data of the air spring is recorded after the height is reduced if the adjusted height is lower than the second preset height. The system can monitor suspension height in realtime and timely adjust the height, so that the air spring can consistently keep roughly constant height range, and the roughly constant height of a vehicle is ensured.

The invention belongs to the field of voltage stabilizers, the invention relates to a voltage stabilizer and particularly relates to a digital low-dropout voltage stabilizer. The stabilizer comprisesa voltage input end, a voltage output end, a first reference voltage input end, a second reference voltage input end, a third reference voltage input end, a voltage comparator, a transient detector, acoarse adjustment controller, a fine adjustment controller, a first transistor array, a second transistor array and a load capacitor. The stabilizer is advantaged in that a method of combining coarseadjustment and fine adjustment is adopted so that the transient response speed and precision are improved.

A dual-intelligent-optimization control method for a unit load comprises the steps of firstly establishing a supercritical unit load characteristic nerve network prediction model for condensate throttling, training and verifying the prediction model by means of historical operation data of the unit, respectively predicting and optimizing the opening degree of a deoxygenator water level regulating valve and the opening degree of a stream turbine valve in a dynamic variable-load period and a constant-load period of the unit by the prediction model, and overlapping the deviation between each optimization result and an original control instruction on a corresponding control signal for performing optimization control on the unit. The dual-intelligent-optimization control method has functions of improving the load response speed of the steam turbine in the dynamic variable-load process, ensuring the deoxygenator water level in a safe operation range of the unit, furthermore ensuring high adjustment precision for the unit load in a condensate flow recovering process of the constant-load period, greatly improving deep peak load regulation capability of the unit, and ensuring long-term safe and reliable operation of a thermal power unit.

The invention discloses an installation aligning method for a shafting. Adjustment is easy and convenient, and meanwhile adjusting accuracy is high. The aligning method includes the steps that couplings are installed on two connecting shafts, and the relative radial deviation and end face deviation between the couplings on the two connecting shafts are measured in the vertical direction and the horizontal direction; the positions of the two connecting shafts are adjusted according to the radial deviation and end face deviation in the horizontal direction, and the axes of the connecting shafts are located in the same vertical plane; then the adjusting quantities of adjusting gaskets of supports at the positions from the first fulcrum to the nth fulcrum of the adjusting shaft are calculated according to the detected end face deviation and radial deviation in the vertical direction; and it is guaranteed that the position of the reference shaft is unchanged, the thicknesses of the adjusting gaskets of the corresponding supports at the positions from the first fulcrum to the nth fulcrum of the adjusting shaft are adjusted according to the acquired adjusting quantities of the adjusting gaskets, and then the two connecting shafts are coaxial. By the adoption of the aligning method, the steps are simple, operation is easy and convenient, aligning time is shortened, and adjusting accuracy is guaranteed.

The invention discloses a 3D imaging device for a mobile device. The 3D imaging device for the mobile device comprises a shell, a three-dimensional imaging lens set arranged in the shell, and a supporting frame which is arranged at the rear end of the shell in a sliding mode, wherein the two ends of the shell are open, lateral sidling grooves which are parallel to the open end faces of the shell are formed in the shell, the three-dimensional imaging lens set comprises a left eye lens set and a right eye lens set, the left spectacle lens set and the right spectacle lens set are placed in the lateral sidling grooves in a sliding mode through lens cylinders which are fixed to a frame of the left lens set and a frame of the right lens set respectively, the supporting frame is used for fixing the mobile device, a screen touching device used for touching the touch screen of the mobile device is arranged on the supporting frame, and when the mobile device is fixed to the supporting frame, the screen of the mobile device right faces the rear end opening of the shell. The mobile device is fixed to the rear end of the shell through the supporting frame, the three-dimensional imaging lens set is installed on the portion, close to eye lenses, of the front end of the shell, a forward virtual image in a long distance can be seen by people after imaging is conducted on an image on the screen of the mobile device through the left lens set and the right lens set, and then amplification and 3D imaging of the image on the screen of the mobile device are achieved.

The invention discloses a comma scraper coating machine capable of automatically adjusting an interval. The comma scraper coating machine comprises a rack (1); a backup roll assembly (2) is mounted on the rack (1); a comma scraper assembly (3) which is matched with the backup roll assembly and is used for coating is further mounted on the rack (1); an automatic inclined block adjusting device (4) is further arranged between the backup roll assembly (2) and the comma scraper assembly (3); and the comma scraper coating machine further comprises a precision detecting device (5) which is used for detecting a size of the interval between the comma scraper assembly (3) and the backup roll assembly (2), and is capable of feeding back detection information to the automatic inclined block adjusting device (4).

The invention discloses an electric head die clearance adjusting device for a blowing machine. The device comprises a box body, a cam and an axle cover sleeve, wherein an upper slide block, a cam sliding seat and a lower slide box are arranged in the box body, an upper box cover is arranged at the top of the box body, and a lower box cover is arranged at the bottom of the box body; slide block fixing plates are arranged at positions corresponding to the front side and rear side of the cam sliding seat; a box body left bearing chamber is formed in the left side of the box body; a left bearing cap is arranged at a position on the left side of the box body left bearing chamber; a box body right bearing chamber is formed in the right side of the box body; a right bearing cap is arranged at a position on the right side of the box body right bearing chamber; the cam is matched with the cam sliding seat and supported in the box body left bearing chamber and the box body right bearing chamber; the axle cover sleeve is fixed with a cam left axle; an axle cover is arranged at a position corresponding to the left end face of the axle cover sleeve; a flange is arranged on the axle cover; a motor is matched with a gearbox, and the gearbox and the motor are fixed with the right bearing cap; and the output shaft of the gearbox is connected with the right axle of the cam. The structure is simplified, convenience is brought to manufacture, assembly and routine use and maintenance, and the response speed is increased; and the energy is saved, and the adjusting precision of the head die clearance is ensured.

A height regulator for a seat belongs to an automobile seat component, which comprises a first case which is provided with a first cavity, a second case which is connected with a side plate of the seat basin and is provided with a second cavity and a third axle hole, a first axle core a second axle core and a big roller which are arranged between the first cavity and the second cavity, a fan-shaped gear block which is connected with a seat cushion of the seat as well as a return spring and a wrench which are separately arranged at the outer side of the cover of the first case. The regulator has the advantages of small volume, simple structure and convenient installation; only one height regulator is needed on each seat, which can save usage cost; the movement has the good flexibility and the firm locking; as friction is used for driving and no space and gears exist between components, the operation is soft, flexible and energy-saving and the regulatory accuracy can be ensured; as the scope of the reciprocating motions of a wrench is small, the use space of the seat can be effectively increased; the free connection with any seat can be realized and the connection is simple; the height regulator for the seat of the invention has the wide application scope.

The invention discloses a making and forming method for a model of a siphon type water outlet passage of a large pump station and belongs to the technical field of hydraulic engineering pump stations. The method is characterized in that the making and forming process of the siphon type water outlet passage is divided into the three main stages of framework forming, small segment forming and integral forming; a framework, with errors easy to control, of the siphon type water outlet passage is introduced to serve as the support of small segment forming and integral forming; the siphon type water outlet passage is divided into a plurality of small segments according to a drawing, and blanking is conducted according to expanded drawings of all the small segments; with the aid of the framework, all the small segments are formed and connected with the framework through spot welding, and integral forming is achieved by splicing segment by segment; and the siphon type water outlet passage obtained after integral forming is tested and trimmed with a three-dimension scanning technique. According to the making method for the model of the siphon type water outlet passage, a series of effective error control measures are adopted, so that the making and forming precision of the model of the siphon type water outlet passage is ensured, and necessary conditions are provided for improving the quality of a performance test of a model of a pump device.

The invention belongs to the space optical technology field and especially relates to an adjustable reflecting-mirror Bipod flexible support structure, a support device and an assembling adjusting method. The adjustable reflecting-mirror Bipod flexible support structure comprises two flexible rods whose top portions are connected, and a bidirectional adjusting mechanism. The bidirectional adjusting mechanism comprises a fixing support and a bidirectional ball screw installed on the fixing support. Two ends of the bidirectional ball screw are provided with screw joints respectively. The bidirectional ball screw possesses two segments of screw threads whose screw pitches are the same and rotation directions are opposite. When the bidirectional ball screw is rotated, the two screw joints symmetrically move along the ball screw. Bottoms of the two flexible rods are hinged to the two screw joints respectively. The two flexible rods can rotate about a top portion connection point. The fixing support is provided with a servo motor used for driving the bidirectional ball screw to rotate and a potentiometer used for recording and feeding back a rotation direction and an angle of the bidirectional ball screw.

The invention provides an operation robot and a mechanical arm thereof. The mechanical arm comprises a horizontal moving joint, a first rotating joint, a connecting arm and a vertical moving joint. The first rotating joint comprises a first rotating shaft and a first outer cylinder arranged on the first rotating shaft in a sleeving mode, and the first outer cylinder can rotate around the first rotating shaft. The connecting arm is connected with the first outer cylinder and the vertical moving joint. The vertical moving joint comprises a connector and is used for driving an external component connected with the connector to move in the vertical direction. The horizontal moving joint is connected with the first rotating shaft and used for driving the first rotating joint to move in the horizontal direction. According to the operation robot and the mechanical arm thereof, the horizontal movement of the mechanical arm can be achieved through the horizontal moving joint, and the vertical movement of the mechanical arm can be achieved through the vertical moving joint; as the number of the joints is small, the structure relation is simplified, the appearance size of the mechanical arm is reduced, and the overall mass of the mechanical arm is reduced; besides, the precision of movement control is high, additional movement displacement can be avoided, and operation is easier and more convenient.

The invention discloses a cable net reflecting surface developable antenna thread differential motion cable length adjusting device and adjusting method. The device comprises a differential screw barrel, internal threads with different thread pitches and the opposite turning directions are arranged at the two ends of the inner wall of the differential screw barrel, external threads matched with the internal threads at the two ends of the inner wall of the differential screw barrel are arranged on a pair of adjusting screw rods respectively, the adjusting screw rods are screwed into the two ends of an inner cavity of the differential screw barrel, and small holes in the direction of the axes of the adjusting screw rods are formed in the stretching ends of the adjusting screw rods respectively. A compression spring is arranged between the inner end faces of the adjusting screw rods inside an inner cavity of the differential screw barrel. Differential screw barrel scales are evenly distributed on the outer wall of the two ends of the differential screw barrel respectively, and adjusting screw rod scales are arranged at the stretching ends of the adjusting screw rods respectively. The cable length is adjusted fast and precisely in a thread differential driving mode. The device has the advantages of being simple in structure, having multiple adjusting modes, and being convenient to use.

The method comprises: attaching the video signal cable of the video camera to the image collecting card that is installed in a computer; the video signals outputted from the video camera are inputted into the computer through the image collecting card; the computer reads the image data, and then calculates and displays the gray scale difference between two neighboring pixels and the distance between the optical crosshair and the center of the viewing field; according to the displayed data, adjusting the position of the video camera to let its target surface be on the image surface of the optical system and to let the optical crosshair overlap the center of the viewing field.

The invention relates to a zero calibration method for an adjusting device for an antenna panel, which can solve the technical problem of low adjustment precision of the adjusting device caused by improper zero calibration way, and the adopted technical scheme is as follows: the zero calibration method is realized during the process of using the adjusting device to adjust the position of the antenna panel, the adjustment process can drive a lifting mechanism with the help of a stepping motor and a power transmission mechanism arranged on a main framework, a controller and matching software procedure, a support frame of the antenna panel arranged on the lifting mechanism can realize position adjustment of the lifting with the help of the lifting mechanism, a grating ruler with a grating groove, a first groove type optocoupler, a code wheel with the grating groove and a second groove type optocoupler are further arranged in the adjusting device, wherein the grating ruler and the first groove type optocoupler are arranged on the support frame, and the code wheel and the second groove type optocoupler are coaxial with a rotating shaft of the stepping motor, and initial zero adjustment and precise zero adjustment are carried out under the conditions. The key of the zero calibration method is that a zero adjustment mechanism is increased in the adjusting device, thereby achieving the purpose of precisely adjusting zero position and improving the adjustment precision of the adjusting device.

The invention discloses a fully automatic leveling structure for a 3D printer, which includes a frame, a nozzle and a heated bed plate. The frame is provided with an XY platform, and the XY platform is provided with an active synchronous wheel, a passive synchronous wheel, a guide rail and an X-axis fixed plate. The two ends of the lower part of the X-axis fixed plate are provided with guide rail grooves, the guide rail grooves are erected on the guide rails, the active synchronous wheel and the passive synchronous wheel are connected with a belt, and the belt drives the X-axis fixed plate to move back and forth on the Y-axis. The beneficial effects of the present invention are : The automatic leveling system can complete the automatic leveling of the large-format 3D printer printing platform. This method completes the distance measurement through the distance sensor, measures three points, compares the data, and uses the distance between the first support column and the second support column. The measurement distance between the measurement points is used as the reference to adjust, the measurement points are few, and the speed is fast.

The invention discloses a design method of a throttle valve with pressure drop linearly changed with the opening degree. The design method comprises the following steps: a mathematic model of a valve core contour is established according to a target of a linear relationship between the pressure drop of the throttle valve and the opening degree, flow characteristics, an open area and geometric conditions of a valve core, a locus equation to be met by the contour of the valve core is deduced through an equivalent area curve equation, a contour curve of the valve core is obtained through the locus equation, and the valve core structure of the throttle valve is obtained. The managed pressure regulation linearity and the valve core contour curve with higher precision can be obtained with the design method, and the design method is more efficient and general.

The invention discloses a special automatic regulating device for the taper error of a centerless internal grinding machine. According to the device, a PLC (1) is connected with a grinding wheel shaft step motor driver (2), a grinding wheel motorized spindle driver (3), a taper regulating step motor driver (4) and a touch display screen (5) respectively; a taper regulating step motor (6) is connected with a taper regulating worm (7); the taper regulating worn (7) is connected with a taper regulating worm wheel (8), a part of a rotatable workpiece table (9); the rotatable workpiece table (9) is provided with a rotating shaft (10); and a grinding wheel (15) is mounted on a grinding wheel motorized spindle (16). According to the device, when the centerless internal grinding machine conducts grinding machining, corners of the workpiece table can be automatically quantificationally adjusted through the PLC, the step motors and the like according to the taper error of a machined work piece to guarantee that the taper error of the machined work piece is within a tolerance range.

The embodiments of the invention provide a volume adjustment method, a volume adjustment device and a mobile terminal. The method includes: determining a first step size according to the first volumeadjustment operation of a user, and adjusting the volume of the mobile terminal according to the first step size; after the reverse volume adjustment operation of the user is detected for the first time, determining a second step size according to the continuous volume adjustment operation of the user, and adjusting the volume of the mobile terminal according to the second step size, wherein the second step size comprises a step size obtained by reducing the first step size on the basis of a preset step size reduction multiple at least once. In the process of volume adjustment, by dynamicallyadjusting the step size, the volume of the mobile terminal is quickly adjusted by adopting a large step size at the initial stage of volume adjustment, so that the volume quickly approaches a target volume at the initial stage of volume adjustment, the volume of the mobile terminal is accurately adjusted by adopting a small step size at the later stage of volume adjustment, so that the volume is finely adjusted nearby the target volume, and thereby not only the efficiency of volume adjustment but also the effect of volume adjustment precision are ensured.

The invention discloses a gas flow regulation device for a rotary spray pipe value of a solid rocket-ramjet engine. Each of a first fixed part and a rotating part is provided with one central hole andtwo arc-shaped holes in the axial direction; the front end of a transmission shell and an axial outlet section of a rear sealing head shell of a combustion chamber form a dynamic sealing structure; the tail end of the transmission shell and the head end of a spray pipe shell form a dynamic sealing structure; an outer ring of a thrust self-aligning roller bearing is mounted and fixed to the interior of a shell hole in the head end of the spray pipe shell; and the inner ring of the thrust self-aligning roller bearing is fixed to a shaft neck of the tail end of the transmission shell in a matched manner. A driving motor drives a driven gear to rotate to determine a corresponding angle of a transmission ratio, and finally, drives the rotating part to rotate at a corresponding angle relative to the first fixed part, so that the two arc-shaped holes of the rotating part and the fixed part are staggered and sheltered in the axial direction, thereby changing the effective outlet circulation area of the gas of the combustion chamber and realizing gas flow regulation with determined accuracy. The gas flow regulation device for the rotary spray pipe value of the solid rocket-ramjet engine isbetter in transmission mechanism thermal protection, more compact in structure and has higher work reliability, and can realize higher-precision and larger-range gas flow regulation.

The invention discloses a dry-type compound machine. The dry-type compound machine comprises a drying tunnel, a coating device, a compound device, a first unreeling mechanism corresponding to the coating device, and a second unreeling mechanism and a reeling device both corresponding to the compound device, wherein the coating device and the compound device are arranged under the two ends of the drying tunnel, respectively; the coating device is a five-roller coating device which comprises roller frames located on the two sides, and a five-roller coating mechanism, a guide roller I for guiding a first base material unreeled by the first unreeling mechanism to the five-roller coating mechanism and a guide roller II for guiding the first base material coated with glue by use of the five-roller coating mechanism to the drying tunnel are arranged between the two roller frames. The coating glue of the five-roller coating device can be high-concentration glue, and therefore, the problem of environmental pollution caused by glue leakage due to excessive diluent can be avoided; in addition, the coating amount of the coating glue on the first base material can be adjusted conveniently by adjusting the rotating speed of the five-roller coating mechanism, and the adjustment of the coating amount is simpler and more accurate.

The invention relates to an automatic device. The invention aims to provide an autonomous recovery device of a water surface unmanned boat, and according to the device, the unmanned boat can be stablyrecovered to a mother ship. According to the technical scheme, the autonomous recovery device of the water surface unmanned boat comprises a main controlling table arranged on the mother ship; and the autonomous recovery device is characterized by further comprises a first controlling platform, a lifting platform, a rotating platform and a second controlling platform, wherein the first controlling platform is provided with a handle, the lifting platform is arranged on the rotating platform and used for driving the first controlling platform to vertically move, the rotating platform is arranged on the second controlling platform and is used for driving the lifting platform to horizontally move, and the second controlling platform is arranged on the mother ship and is used for driving the rotating platform to rotate; and the rotating platform comprises a base, a stand column, a lifting arm, a sliding table, a rotating mechanism and a walking mechanism, wherein the base is fixed on the second controlling platform, the stand column is positioned on the base in a rotating mode, the lifting arm is fixed on the top of the stand column and stretches transversely, the sliding table is capable of sliding in the length direction of the lifting arm, the rotating mechanism is used for driving the stand column to rotate, and the walking mechanism is used for driving the sliding table to slide on the lifting arm.

The invention provides an operation control method, a compressed air heat exchange system and a readable storage medium. The operation control method of the compressed air heat exchange system comprises the steps of responding to an obtained regulating instruction, and configuring the opening degree of an air valve according to the relationship between the air inlet temperature and the set temperature of a room to regulate the flow of airflow flowing out from an air outlet and entering a first channel through a bypass pipeline, wherein the regulating instruction is used for regulating the airinlet temperature of the air inlet, and the regulating rate of the air inlet temperature is positively correlated to the opening degree of the air valve. By executing the technical scheme, on one hand, the air blowing discomfort caused by excessively-low and excessively-high air inlet temperature to a user can be lowered; on the other hand, fresh air supply is achieved, and on the premise of the high outdoor air quality, the quality of air inside a room is improved; on the other hand, circulation of air inside the room can be facilitated, and therefore a temperature field is more uniform.

The invention discloses a full-automatic continuous adjustable extractor hood adopting a capacitance-type sensor. The full-automatic continuous adjustable extractor hood comprises an extractor hood shell, and a capacitance-type sensor, a fan and a speed control circuit which are arranged in the extractor hood shell, wherein the capacitance-type sensor comprises a body base which is internally provided with a first cavity and a second cavity, and a sensor shell matched with the body base; the bottoms of the first cavity and the second cavity are communicated, liquid insulating media are filled inside the first cavity and the second cavity; the height of the first cavity is more than that of the second cavity, the liquid level sectional area of the liquid insulating media is less than that of the second cavity; the first cavity is communicated with atmosphere through an atmosphere inlet in the top, two parallel opposite electrode plates are arranged inside the first cavity along a height direction; the second cavity is communicated with a public flue through a flue gas inlet in the top; and the electrode plates are used as output ends of the capacitance-type sensor and connected with the input end of the speed control circuit, the output end of the speed control circuit is connected with a motor, and the output end of the fan is communicated with the public flue.