194results about How to "Adjustable opening" patented technology

An X-ray diagnostic system is provided, which uses X-rays to image the lower limb of an object under conditions suitable for a flow of an X-ray contrast agent injected into the object. In the system, a C-shaped arm supports both an X-ray tube and an X-ray detector so that an object-laid tabletop is located between both the tube and the detector. For instance, one of the tabletop and the C-shaped arm is relatively moved with respect to the other so that the object is imaged along a body-axis direction thereof. The apparatus is able to perform a fluoroscopic scan to obtain a body-axis directional fluoroscopic image of the agent-injected object and to set imaging parameters, region by region in the body-axis direction, necessary for an imaging scan using the fluoroscopic image. The imaging parameters are used for the imaging scan of the agent-injected object.

A column cultivation matching transplanting robot belongs to the agricultural robot field. The column cultivation matching transplanting robot comprises a mobile platform, a manipulator, an end performer inclination angle adjusting mechanism and an end performer. During working, the mobile platform carrying plug seedlings moves to the front of a cultivation column, the manipulator moves to send the end performer to the front of a plug, an electromagnet is supplied with power and drives two fingers to stretch out, and bent finger sliding sleeves guide the finger tips to inward incline and to be inserted into the holes of the pugs to clamp the seedlings; the manipulator moves to take out the seedlings and convey the seedlings to seedling falling positions, and a sliding carriage vertically descends along a sliding rail to plant the seedlings into soil; and the electromagnet is powered off to retract the two fingers into the sliding sleeves to realize the seedling disposing. The column cultivation matching transplanting robot utilizes the two-arm structure of the vertical sliding rail to realize the vertical large-range movement and the seedling delivery motion, and the inclination angle and the opening degree of the end performer are adjustable, so automatic transplanting needs of high cultivation columns by the plug seedlings are satisfied.

A combination animal house and pet feeder is disclosed. The animal house can be for any variety of pet such as a dog, cat or rabbit. The feeder is configured to integrate into the animal house by passing the feeder either through the roof of the animal house of in from a wall or side of the house. The feeder includes a self-closing mechanism that allows the feeder to be filled outside of the animal house, placed into the animal house, and once installed the feeder opens to dispense food. Alternately food may be loaded into the feeder from the top of the feeding mechanism. The dispenser is ideally suited for dispensing dry animal food, buy may alternatively or additionally include dispensers for wet food or water inside or outside of the animal house.

The invention relates to a compound fertilizer for field crops planted in arid regions, semiarid regions and desert regions, and particularly relates to a slow-release water-retaining compound fertilizer composition. The slow-release water-retaining compound fertilizer composition is prepared from the following raw materials in parts by weight: 5-6 parts of urea, 5-6 parts of potassium dihydrogen phosphate, 15-16 parts of diammonium phosphate, 2-3 parts of fulvic acid, 13-18 parts of humic acid, 8-10 parts of attapulgite, 1-1.5 parts of ethylene diamine tetraacetic acid, 1-1.5 parts of citric acid, 15-16 parts of ferrous sulfate, 12.5-14 parts of calcium carbonate, 7-8 parts of zinc sulfate, 4.5-6 parts of borax, 1-1.5 parts of iodine ore powder and 1-1.5 parts of molybdenum ore powder. The slow-release water-retaining compound fertilizer composition has the functions of salt tolerance, drought resistance, water saving, water retaining, nutrition, slow release, rootage, soil structure improvement and the like, can enhance the effective utilization rate of the fertilizer and reduce the pollution to soil, and is applicable to forest planting, desert control, field crops, greenhouse vegetables, fruit trees, traditional Chinese medicinal materials, flowers and the like in arid and semiarid regions.

Disclosed is a refrigeration system wherein a hot gas bypass circuit (15) is provided for allowing a refrigerant discharged from a compressor (11) to flow bypassing at least a condenser (12) and a expansion valve (13) and a flow control valve (16) is arranged in the hot gas bypass circuit (15).

The invention discloses a high voltage line insulator automatic cleaning tool, and mainly relates to the technical filed of insulator cleaning. The cleaning tool includes a frame body, the frame body is provided with opposite arc guide rails, the inner sides of the arc guide rails are connected with an arc carriage, the two ends of the arc carriage are limited against the far-away ends of the arc guide rails, the two ends of the inner side of the arc carriage are hinged with support rods, the torsion springs are arranged at the roots of the support rods to open the support rods, a strip is connected between the support rods, and brushhair is arranged on the strip. The cleaning tool rapidly and conveniently sleeve the insulator without influencing the connection parts of the two ends of the insulator, can better adapt to the fluctuating of the umbrella skirt, and comprehensively and completely clean the circumference, head and tail of the insulator.

An improved closeable lid for a beverage container is described. The lid uses a base, a flanged gasket, a valve and a knob to allow a user to control the flow of liquid from the beverage container. The flanged gasket surrounds the base with radially extending flanges that conforms to the interior of the beverage container, creating a seal. The valve moves vertically to engage and disengage the seal created by mating the valve face to the valve seat. The vertical movement of the valve is modulated by the rotation of a knob that is connected to the valve that provides a threaded shaft. The user can consume liquid from the beverage container as a result one or more fluid apertures through the base allowing for the passage of fluids from the beverage container past the valve and through base to the user. When the knob is rotated to the closed position, the valve creates a seal preventing the flow of liquid through the fluid apertures of the base.

The invention discloses an air conditioner. The air conditioner comprises a compressor, an ejector, a reversing assembly, an indoor heat exchanger, an outdoor heat exchanger and a gas-liquid separator, wherein a coolant outlet of the ejector is connected with an air return opening of the compressor; the reversing assembly is provided with four ports, wherein a first port is connected with an air outlet of the compressor, a second port is connected with an injection inlet of the ejector, the indoor heat exchanger is connected with a third port, and the outdoor heat exchanger is connected with a fourth port; the gas-liquid separator is provided with three interfaces, wherein a first interface is connected with the indoor heat exchanger, a second interface is connected with the outdoor heat exchanger, and a third interface is connected with an ejecting inlet of the ejector so as to enable gaseous coolants to be introduced into the ejector. According to the air conditioner disclosed by the invention, the heat exchange efficiency of the heat exchangers is improved, the ejector not only can heat returned air of the compressor and increase the degree of superheat of the returned air but also can recover partial throttling loss work and improve the energy efficiency of the air conditioner. The air conditioner is simple and reasonable in structure, high in running efficiency, wide in application range and excellent in low-temperature heating effects.

A collapsible reel mechanism comprises a main shaft, a collapsible reel, a spring device and a collapsible transmission mechanism, wherein the collapsible reel is composed of at least three mutually independent separation reels. The collapsible transmission mechanism comprises a collapsible power device, a connecting rod and a plurality of wedged slide block mechanisms, each of the wedged slide block mechanisms comprises a collapsible block, a wedged block and a pulling rod, the collapsible block and the wedged block respectively have wedged oblique surfaces and form oblique surface cooperation through the wedged oblique surfaces, and the wedged block drives the collapsible block to move in a radical direction and drives the reel to synchronously open or close in order to realize extension uncoiling of a steel band coil by the collapsible reel. The collapsible reel mechanism has the advantages of flexible motion, large uncoiling force, adjustable opening degree (the working diameter) of the collapsible reel, stable and reliable working, simple adjustment and use, easy production manufacturing, high reliability and strong applicability, and is widely suitable for being arranged on various uncoilers to carry out steel band coil uncoiling in order to meet sections steel production needs.

The invention discloses a granulating device comprising a movable template, a granulating box, a fixed template, a compression ring, a template hole adjusting device, a cutter, a cutter head, a cutter head bushing and a bearing, wherein the movable template is rotationally mounted between the fixed template and the compression ring; the fixed template and the compression ring are connected with the granulating box respectively; the upper part of the movable template is connected with a lead screw joint of the template hole adjusting device; the template hole adjusting device is mounted on the side surface of the granulating box; the cutter is mounted on the cutter head; the cutter head is mounted on the cutter head bushing; the cutter head bushing is sleeved on the projecting shaft of screw rod; and the tail end of the screw rod is supported by the bearing. The granulating device provided by the invention is only used for cutting up sizing material extruded out by the templates and has no special requirement on the shape and the size of the sizing grains, so that no independent cutter driving device is needed, and the cutter rotates along with the screw rod of an extruding machine to achieve the purpose of granulating. The granulating device satisfies different manufacturing technologies due to the adjustable opening degree of the movable template and the fixed template and has the advantages of simple structure, convenience in operation and maintenance, and reliable performance.

The opening display device for hidden rod gate valve has one shifting wheel on the valve rod, one support board with at least one raised spot or notched pit fixed onto the stuffing gland, and one toothed disc with teeth and scales installed on the support board. The teeth, the scales and the notched pit or raised spot on the toothed disc in the same number are distributed in ring; and the notched pit or raised spot on the toothed disc and the raised spot or notched pit on the support board are meshed each other. When the valve rod rotates by one certain angle, the notched pit or raised spot on the toothed disc and the raised spot or notched pit on the support board are once meshed, and the toothed disc rotates by one scale.

The embodiment of the invention provides a method and device for controlling a refrigerant of an air conditioner and the air conditioner, and belongs to the field of domestic appliances. The method comprises the steps that the number of inner units which are operated in the air conditioner operation process is determined; whether the number is changed or not when the air conditioner is continuously operated for a preset period of time; on the condition that the number is not changed, the refrigerant of the air conditioner is controlled according to a superheat degree control method; and on the condition that the number is not changed, the refrigerant of the air conditioner is controlled according to an average temperature control method. The device comprises a controller. The air conditioner comprises the device. Accordingly, whether the refrigerant of the air conditioner is controlled by the average temperature control method or the superheat degree control method is determined according to the number of the operated inner units, the efficiency of heat exchangers of the inner units can be sufficiently utilized, and refrigerant distribution of the inner units is achieved.

The invention discloses a tooth extraction auxiliary device for stomatology. The tooth extraction auxiliary device comprises a base, wherein a supporting frame is mounted on the base, a mounting groove is formed in the middle of a top frame of the supporting frame, two ends of the top frame of the supporting frame are fixedly connected with traction belts, the supporting frame is connected with an opening assistive device through a thread, the opening assistive device comprises two cylindrical mounting seats, two intermeshed gears are mounted inside the left cylindrical mounting seat through wheel axles, two fixed pulleys are mounted inside the right cylindrical mounting seat through fixing shafts, outer sides of the gears and the fixed pulleys are all fixedly connected with rotating frames, supporting rods are mounted on outer sides of the rotating frames, lip sleeves are fixedly mounted at tops of the rotating frames, and a lip can be easily supported by the lip sleeves, so that a dental patient can open mouth more easily during tooth extraction, the patient has less possibility of shutting up mouth when suffering pain, cheeks of the patient can be well propped open due to the design of the supporting rods, and a doctor can carry out tooth extraction for the patient more easily and smoothly due to a broader field of vision.

The invention relates to a ball park service robot, and belongs to the field of intelligent robots. The ball park service robot comprises a ball delivering device, a haulage motor walking device, a ball grabbing mechanism and a robot body, the ball delivering device is arranged at the back end of the robot body, the haulage motor walking device is arranged at the middle portion of the robot body,and the ball grabbing mechanism is arranged at the front portion of the robot body; and through electromechanical liquid cooperative control, automatic walking, obstacle avoidance, collecting and shooting functions of the ball park service robot are completed. The robot is simple in overall structure, concise in mechanism, reliable in running, low in manufacturing cost and low in running and maintaining cost, collecting and shooting of large balls like basketballs can be achieved, and the ball park service robot can be widely applied to ball park exercise training for various balls.

The invention discloses a vibrating fruit picking device and a picking method. The vibrating fruit picking device comprises a moving device, a vibrating device and a collecting device, wherein the vibrating device and the collecting device are both mounted on the moving device; the vibrating device comprises a vibrating motor, a first transmission device and a clamping device; an output shaft of the vibrating motor is connected with the clamping device by the first transmission device; trunks of a fruit tree can be clamped by the clamping device; the vibrating motor can drive the clamping device to vibrate by the first transmission device; the collecting device comprises a collecting mesh and a telescopic bracket; the telescopic bracket is arranged on the moving device; the collecting meshis arranged on the telescopic mesh; the telescopic bracket can be extended and retracted to drive the collecting mesh to be unfolded and folded; the collecting mesh is elastic and is used for collecting fruits. The vibrating fruit picking device provided by the invention is simple in operation and relatively high in safety and reliability, and can improve picking efficiency, save manpower and material resources, better ensure the quality of the picked fruits and reduce damage to fruits during picking.

The invention relates to a combined harvester sorting sieve with sieve piece spacing and oblique angle adjustable. The sorting sieve includes a vibrating plate, a shear blade type spacing adjusting mechanism, wave-shaped sieve pieces, a jagged tailing sieve body, a lower sieve body, a spacing adjustment driving mechanism, cleaning sieve side walls, a tailing sieve adjusting plate and an eccentric rocking shaft; spacing adjustment devices are installed on the cleaning sieve side walls, and the spacing adjustment driving device is installed on the tailing sieve adjusting plate. The driving mechanism can drive the spacing adjusting mechanism to move through stretching out and drawing back of an extension end so as to increase or decrease the sieve piece spacing. The problem that after passing through a sieve, grains are inconsistent in uniformity is solved, and according to the need, the distance between each two sieve pieces in the different positions in the longitudinal direction of a sieve surface can be adjusted, so the sieve pieces in the different positions on the sieve surface can possess the respective optimum spacing; the lower ends of the wave-shaped sieve pieces can adjust the sieve piece oblique angle by hooking springs, and oblique angle change can guide air flow of a draught fan to fully pass through the sieve; at the same time, the novel wave-shaped sieve pieces solve the problems that grass is easily hooked on the tip of a traditional fish scale sieve and the sieve is easily stuck and blocked.

The invention discloses an on-duty sentry box air-conditioner system combined dew point indirect evaporative cooling and solar power generation. The on-duty sentry box air-conditioner system comprises a composite dew point indirect evaporative cooling air conditioning unit and a solar power generation assembly arranged on the outer side of a ceiling of an on-duty sentry box, the solar power generation assembly is connected with a solar power generation system, a primary air opening of the composite dew point indirect evaporative cooling air conditioning unit is connected with an annular air pipe arranged on the inner side of the ceiling of the on-duty sentry box through a primary air pipe, a plurality of rectangular jet flow noise elimination air openings are formed in the annular air pipe, a secondary air opening of the composite dew point indirect evaporative cooling air conditioning unit is connected with a hollow sentry box supporting rod of the on-duty sentry box through a secondary air pipe, and a plurality of spherical jet flow noise elimination air openings are formed in the hollow sentry box supporting rod. According to the on-duty sentry box air-conditioner system, the evaporative cooling dry air energy and the natural energy of solar energy are combined, the temperature of the on-duty sentry box can be effectively reduced, and the on-duty sentry box air-conditioner system further has the advantages of saving energy, being environmentally friendly, economical and easy and convenient to use.

The present invention discloses an electric hydraulic test plugging valve for steam-electric power generation, and it is characterized by that the lower portion of valve body of plugging valve is equipped with a cross pipe which can be used for connecting pipeline, the upper portion of the valve body is equipped with valve cover, and on the top portion of said valve body an electric device is mounted, the upper end of the valve rod is connected with the electric device, and its lower portion is connected with valve flap mounted in the valve body, on the ring recessed groove positioned at side surface of valve flap and mounted in the interior of cross pipe a valve seat is set, said valve seat is formed from inner valve seat and outer valve seat which can be leftward and rightward floated, an elastic sealing body is mounted between inner and outer valve seat, and a spring is mounted beween outer valve seat and bottom wall of ring recessed groove on the valve body. Said plugging valve can quickly implement conversion of opening and closing functions.

An improved closeable lid for a beverage container is described. The lid uses a base, a flanged gasket, a valve and a knob to allow a user to control the flow of liquid from the beverage container. The flanged gasket surrounds the base with radially extending flanges that conforms to the interior of the beverage container, creating a seal. The valve moves vertically to engage and disengage the seal created by mating the valve face to the valve seat. The vertical movement of the valve is modulated by the rotation of a knob that is connected to the valve that provides a threaded shaft. The user can consume liquid from the beverage container as a result one or more fluid apertures through the base allowing for the passage of fluids from the beverage container past the valve and through base to the user. When the knob is rotated to the closed position, the valve creates a seal preventing the flow of liquid through the fluid apertures of the base.

The invention discloses a shell assembly of an air conditioner outdoor unit, a control method, the air conditioner outdoor unit and an air conditioner. The shell assembly comprises a shell, a first air hood and a second air hood, wherein the shell is provided with a first air inlet and a first air outlet; the first air hood is provided with a second air inlet and a second air outlet, the opening degree of the second air inlet is adjustable, the second air inlet communicates with the outside, and the second air inlet further communicates with the first air inlet; and the second air hood is provided with a third air inlet and a third air outlet, the third air inlet communicates with the first air outlet, and the third air outlet communicates with at least one of the first air inlet and the outside. According to the shell assembly, the different load requirements are met by adjusting the air intake area and resistance of the first air inlet and changing the air intake volume, the air conditioner can perform refrigeration under low temperature, and influences on the refrigeration effect and the heating effect under normal temperature can be reduced to the greatest extent.

The invention discloses a counterweight-variable and hydraulic power-controllable automatic fixed shaft turning plate gate; a water tank is arranged at the lower part of the back side of a gate; the gate is connected with a rotating shaft; the rotating shaft is connected with a water fan in a water storage tank by penetrating through an open web type gate pier wall; a steel wire rope, supported by a bracket and a pulley, of a heavy hammer of a water collecting well pulls the water fan; and a reservoir is communicated with the water storage tank and the water collecting well by water inlet and outlet pipes. The gate with the water tank is arranged; when the gate is closed or opened, a counterweight is changed, so that the gate is flexible in opening or closing; the rotating shaft is fixedly connected with the gate, and is prevented from being blocked by floating impurities; a gate pier bracket and a baseplate bracket adopt different shapes to prevent floating objects from blocking a lock chamber to be in favor of safe flood discharge of a water gate; the heavy hammer of the water collecting well is arranged for pulling the water fan to solve manual control of gate opening degree and timing water diversion and to guarantee normal operation of the gate under special working conditions; and the water fan and a vibration reducing support prevent the opening / closing of the gate from colliding the gate pier bracket and a baseplate support pier of the locking chamber, so that the gate operation stability is guaranteed, and the engineering life is prolonged.

The invention discloses an air conditioner system and a refrigeration control method and device to increase the annual energy efficiency ratio of an air conditioner, reduce energy consumption of the air conditioner and improve work reliability of the air conditioner. The air conditioner system comprises at least one first refrigeration circulating loop and at least one second refrigeration circulating loop, each first refrigeration circulating loop comprises a first evaporator element, a compressor, a first condenser element and a first throttle valve which are sequentially connected to form closed circulation, and each second refrigeration circulating loop comprises a second evaporator element, a second condenser element, a pump and a second throttle valve which are sequentially connected to form closed circulation; the first evaporator elements in the first refrigeration circulating loops and the second evaporator elements in the second refrigeration circulating loops form a combined evaporator, the first evaporator elements are located at the air outlet side of the combined evaporator, and the second evaporator elements are located at the air inlet side of the combined evaporator.

The invention provides a vacuum servo brake control system and control method of an unmanned electric automobile and belongs to the technical field of automobile brake. The vacuum servo brake control system comprises an instrument panel, an electric vacuum pump, a one-way valve, a first vacuum degree sensor, a vacuum gas storage tank, an alarm, a filter ring, a felt filter ring, a vacuum thruster, a first valve, a first servo motor, a second valve, a second servo motor and an electric control unit. According to the vacuum servo brake control system, the vacuum thruster only has a front air chamber, and differently, a traditional vacuum thruster has two air chambers; the first servo motor and the first valve are in rigid connection, the second servo motor and the second valve are in rigid connection, and the opening of the valves is adjusted precisely and quickly; and an air chamber shell is provided with a first air hole and a second air hole, one air hole can communicate with the atmosphere by adjusting the opening of the valves and suck or exhaust air by adjusting the valves through the motors independently, and therefore the hole can be used in the vacuum thruster of the unmanned electric automobile. The vacuum servo brake control system can be applied to the unmanned electric automobile and has good development prospects.

The invention particularly relates to an adjustment method and an adjustment system for an electronic expansion valve of an air conditioner, and the air conditioner. The method comprises the following steps: acquiring the air volumes of a fan before and after fan gear change of the fan, and generating an air volume change value of the fan; acquiring the adjustment step number of the electronic expansion valve according to the air volume change value of the fan; and adjusting the electronic expansion valve by virtue of the adjustment step number. According to the method disclosed by the invention, the fan gear change condition of the fan can be rapidly responded during a running process of the air conditioner, thus the opening degree of the electronic expansion valve is accurately adjusted, the refrigerant amount of the system is matched with the heat exchange amount of a heat exchanger, a time needed for adjusting the electronic expansion valve to enable the system to be stable is short, and the stable running of the system can be kept.

Disclosed are an exhaust system and a control method for reducing the exhaust back pressure. The exhaust system comprises an exhaust manifold, a front muffler, a first rear muffler, a second rear muffler, an exhaust back pressure sensor and a controller; the first rear muffler and the second rear muffler are arranged in a parallel mode; a controllable valve which is used for adjusting the exhaust flow rate is arranged at the air inlet end of the second rear muffler; the exhaust back pressure sensor is located at the front end of the exhaust manifold and used for measuring the exhaust back pressure of an engine; the controller is in communication connection with a vehicle engine rotational speed signal sensor, the exhaust back pressure sensor and the controllable valve and used for performing real-time collection and processing on rotational speed signals of the engine and pressure signals of the exhaust back pressure so as to adjust the opening of the controllable valve. When the engine runs at the low speed, the noise reduction effect of the vehicle exhaust system is not affected. When the engine runs at the high speed and the exhaust back pressure exceeds a certain calibration threshold value, the controllable valve is driven by the controller to be opened, part of exhaust can be discharged out of the second rear muffler, and accordingly the exhaust back pressure can be stabilized within a certain calibration threshold value.

The invention discloses a method for controlling an electronic expansion valve of a trans-critical carbon dioxide heat pump system. The method includes the following steps that first, an exhaust pressure value is collected; second, water route control parameters are determined; third, the optimal exhaust pressure of the trans-critical carbon dioxide heat pump system is confirmed; fourth, the exhaust pressure is adjusted; fifth, the COP in the steady state of the system is calculated; and sixth, the optimal exhaust pressure is verified through particle swarm optimization (PSO). By adoption of the method, the exhaust pressure can be controlled through matching of opening degree adjustment of the electronic expansion valve and exhaust temperature variation, the sampling speed is high, precision is also high, time delay is small, robustness is high, and the defect of liquid return hidden danger caused by avoidance of the excessively-high exhaust temperature of a compressor in a traditionalexhaust temperate control method is overcome. According to the method, pressure control can be conducted on refrigerating systems like the trans-critical carbon dioxide heat pump system with strong nonlinear characteristics, and higher adjustment control capacity can be achieved when the trans-critical carbon dioxide heat pump system operates under different working conditions.

The invention provides a high-pressure air-free atomization glue-applying method. According to the method, a glue solution is sprayed from a glue-applying device to form fog glue solution streams, and compressed air is provided for carrying out secondary atomization on the glue solution streams sprayed out of the glue-applying device. The invention further provides a high-pressure air-free atomization glue-applying device which comprises a chamber member, a piston device and a resetting mechanism; the chamber member is provided with a longitudinally-through chamber, the front end and the rear end of the longitudinalyl-through chamber are closed, and the front end of the longitudinally-through chamber is provided with a glue solution passage and an air passage which are communicated with the outside; the glue solution passage is provided with a glue solution inlet, and an air inlet is formed in the sidewall of the chamber; the piston device comprises a piston rod, and a valve core is sleeved on the piston rod; and the resetting mechanism comprises two resetting springs, the two ends of one resetting spring are respectively abutted against the piston rod and the closed end of the rear end of the chamber, and the two ends of the other resetting spring are respectively abutted against the valve core and the closed end of the rear end at the upstream of the chamber. According to the high-pressure air-free atomization glue-applying method and the high-pressure air-free atomization glue-applying device, the outflow of the glue solution is automatically controlled, and the sprayed quantity of the glue solution can be accurately controlled; and meanwhile, the sprayed glue solution can be fully atomized, so that the gas pressure of the atomized glue solution is reduced, and the energy consumption is lowered.

The invention discloses a humidifying and dehumidifying device and an air conditioner with the same. The humidifying and dehumidifying device comprises a shell, a rotating wheel, a first partition plate assembly, a second partition plate assembly, a heating assembly and at least one wind wheel; the shell is provided with a containing cavity, the containing cavity is partitioned into an upper chamber and a lower chamber which are spaced from each other through a partition plate, an air inlet is formed in the side wall of the upper chamber, and a humid air inlet and multiple dry air outlets are formed in the side wall of the lower chamber and are spaced mutually; the rotating wheel is used for adsorbing water in the air, and the air entering the upper chamber from the air inlet enters the lower chamber through the rotating wheel; the wind wheels are used for exhausting the air in the lower region through the humid air outlet or the dry air outlets. According to the humidifying and dehumidifying device, the humid air generated by the humidifying and dehumidifying device can be exhausted into the indoor environment according to the use requirement of a user, so that the indoor relative humidity is kept within a human comfort range, and the use performance of the air conditioner is improved.

The invention discloses a control method and system for the opening degree of an EGR valve of an engine. A waste gas circulation system of the engine comprises a second pipeline and a first pipeline.The first pipeline is provided with the EGR valve. The method comprises the steps of acquiring a first pressure value of the second pipeline of the engine when a pressure sensor of the EGR valve is ina failure state; comparing the first pressure value with a first preset value; acquiring a second pressure value of the downstream portion of an air filter when the first pressure value is larger than or equal to the first preset value, and taking the second pressure value as an estimation pressure value of the downstream portion of the EGR valve; and determining a pressure value of the downstream portion of a throttle valve when the first pressure value is smaller than the first preset value, and taking the pressure value of the downstream portion of the throttle valve as an estimation pressure value of the downstream portion of the EGR valve. According to the control method and system, the pressure value of the downstream portion of the EGR valve is determined on the basis of the stateof the throttle valve and a pressure value of the upstream portion of the throttle valve, it is guaranteed that the EGR valve makes a right response on the basis of an instruction of an engine controller, and the performance of the whole car is improved.

The invention discloses a filling valve for preventing dripping leakage, and relates to the field of filling equipment. The filling valve comprises a cylinder barrel piston mechanism, a filling rod and a valve rod. The filling rod and the valve rod are of hollow cylinder structures, the valve rod can be arranged in the filling rod in an axial moving manner, a sealing head in sealing fit with the one end of the filling end is arranged at one end of the valve rod, and the other end of the filling rod is in sealing fit with a rod body of the valve rod. The cylinder barrel piston mechanism comprises a cylinder barrel, a piston rod and a piston. One end of the piston rod is fixedly connected with one end of the piston, the piston can slide and is arranged in the cylinder barrel in a sealed manner, and an inner cavity of the end, away from the piston rod, of the cylinder barrel communicates with an inner cavity of the valve rod. A feeding pipe is further included, and communicates with an inner cavity of the filling rod. According to the filling valve, pollution and waste of materials are avoided, the filling valve can be conveniently controlled, and the filling valve is more precise during filling.