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2196results about How to "Burn out prevention" patented technology
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LED driving power supply control circuit and LED lamp by using same
InactiveCN101715265ALuminous stabilityStable jobAc-dc conversion without reversalElectric light circuit arrangementOvervoltageFull wave
The invention relates to an LED driving power supply control circuit. The LED driving power supply control circuit comprises an EMI filter and rectifier module, a DC-DC isolation constant current driver module, an input under-voltage lag protection module, and an output current protection module, wherein the EMI filter and rectifier module is used for performing EMI filter and full-wave rectification on an alternating-current voltage input by a power supply to generate a direct-current voltage; the DC-DC isolation constant current driver module is used for processing the direct-current voltage so as to generate a constant output current for the work of the LED power supply; the input under-voltage lag protection module is used for clamping and splitting the direct-current voltage so as togenerate an enable signal and controlling the DC-DC isolation constant current driver module to start or not to start according to the enable signal; and the output current protection module is used for detecting the constant output current and controlling the DC-DC isolation constant current driver module to stop generating the output current while the constant output current exceeds a current threshold. The invention also relates to an LED lamp. The LED driving power supply control circuit and the LED lamp realize the alternating-current inputting and constant-current outputting in a wide range and have the input clamping lag protection and the output overvoltage protection functions.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1
Melt differential three-dimensional printer
ActiveCN103692653ABurn out preventionConvenient Quantitative ManagementManufacturing driving meansAdditive manufacturing with liquidsHot runnerMotor drive
The invention discloses a melt differential three-dimensional printer. The melt differential three-dimensional printer mainly comprises a material melting unit, a micro-droplet jetting unit, a cylindrical-coordinate system molding unit and a rack, wherein a servo motor drives a screw rod to rotate in the material melting unit; a heater, which is fixedly arranged inside a machine cylinder, ensures that granules are entirely plastified through temperature regulation; a molten material is transmitted by the screw rod to the micro-droplet jetting unit; in the micro-droplet jetting unit, the molten material is transmitted into a valve body through a hot runner in a runner plate; a linear servo motor drives a valve needle to do reciprocating motion in the valve body so as to quantitatively and intermittently squeeze the molten material out of a nozzle to form melt micro-droplets; in the cylindrical-coordinate system molding unit, the molten micro-droplets are injected to a bearing table for cooling and deposition molding; the servo motors in the left-right direction and in the vertical direction are respectively engaged with the corresponding screw rod to rotate so as to drive the material melting unit and the micro-droplet jetting unit to move along the left-right direction and the vertical direction; a circumference servo motor drives the bearing table with a worm gear to rotate through a worm rod so as to realize three-dimensional movement under a cylindrical-coordinate system.
Owner:BEIJING UNIV OF CHEM TECH
Temperature control dry heating prevention electronic cigarette and temperature control method thereof
ActiveCN104319732APrevent dry burningAvoid burning or scalding the human bodyTobacco devicesEmergency protective arrangements for automatic disconnectionTemperature sensingElectronic cigarette
The invention relates to a temperature control dry heating prevention electronic cigarette and a temperature control method thereof. The temperature control dry heating prevention electronic cigarette comprises a housing, a liquid storage device, an atomization assembly with an atomization chamber and a heating element, a power supply and a circuit control board with a smoking switch, wherein the liquid storage device, the atomization assembly, the power supply and the circuit control board are mounted in the housing in a sleeve mode. The circuit control board provided with a power management module and a temperature sensing unit, wherein the temperature sensing unit comprises a temperature sensor capable of sensing temperature signals of the atomization chamber and converting the temperature signals into temperature electrical signals to be transmitted the power management module, and the power management module determines and deals with the temperature electrical signals to generate control electrical signals for controlling the heating element to be connected to or disconnected to the power supply. The temperature control dry heating prevention electronic cigarette has the advantages of being capable of preventing the dry heating of the heating element of the atomization assembly for preventing the harmful gas and burning smell from being sucked into a human body and the harm to the health of the human body by using the temperature sensor to detect and control the temperature of the atomization chamber.
Owner:HUIZHOU HAPPY VAPING TECH LTD
Gas water heater self-adaption wind pressure resisting control method and system
InactiveCN105757994AAvoid exhaust backflow or backdraftStable combustion workFluid heatersControl modePower flow
The invention discloses a gas water heater self-adaption wind pressure resisting control method. The method is characterized in that when it is set in advance through a main controller that no external wind pressure exists, each fan current corresponds to a fan rotating speed, and each fan rotating speed corresponds to a gas proportional valve current value; when external wind pressure exists, a constant-current control mode is adopted, and fan current corresponding to the same load stays the same; in this way, when external wind pressure increases, constant current is maintained by increasing the voltage of a fan; the input power of the fan becomes larger with the increase of the voltage of the fan, the rotating speed of the fan is increased, and meanwhile, the current of a gas proportional valve is controlled to increase according to the optimal wind-air ratio. The constant-current control mode is adopted, and waste gas backflow or down draft is effectively avoided; meanwhile, the wind-air ratio is automatically adjusted according to the change of the rotating speed of the fan, and it is guaranteed that smoke and efficiency are in the optimal state.
Owner:GUANGDONG MACRO GAS APPLIANCE
Infrared induction temperature control e-cigarette and temperature control method thereof
The invention relates to an infrared induction temperature control e-cigarette and a temperature control method thereof. The infrared induction temperature control e-cigarette comprises a shell, a liquid storage device nested in the shell, an atomization component, a heating element R in the atomization component, a power supply and a circuit control panel with a smoking switch SW. The circuit control panel comprises an infrared temperature induction unit and a power supply management module. The infrared temperature induction unit can receive an infrared radiation signal which is sent from the heating element R and which represents a certain temperature, then converts the same into a temperature electric signal and sends the temperature electric signal to the power supply management module. After judgment and processing, the power supply management module generates a control electric signal to control the heating element R to be connected / disconnected with the power supply. According to the arrangement, with the infrared temperature induction unit, the temperature in an atomization chamber is detected and controlled, and the atomizer is protected from dry burn. Thus noxious gas and burnt flavor are prevented from entering human bodies, and human health is protected.
Owner:林光榕
Anti-dry burning device and anti-dry burning control method of electronic cigarettes
ActiveCN107404107APrevention of dry burningHealth hazardBatteries circuit arrangementsTobacco devicesMicrocontrollerStopped work
The present invention relates to an anti-dry burning device and anti-dry burning control method of electronic cigarettes. The anti-dry burning device of the electronic cigarettes comprises a microcontroller, a buck-boost bridge circuit, a mistorizer resistance value sampling circuit, a mistorizer, a mistorizer resistance value detection module and a battery power supply circuit; and the microcontroller is electrically connected with the buck-boost bridge circuit, the mistorizer resistance value sampling circuit, the mistorizer and the mistorizer resistance value detection module sequentially, and the mistorizer resistance value detection module is connected with the microcontroller; the mistorizer resistance value sampling circuit is electrically with the mistorizer resistance value detection module; a feedback circuit is connected between the mistorizer resistance value sampling circuit and the buck-boost bridge circuit, and the feedback circuit is connected with the microcontroller, and therefore, the microcontroller can adjust the output voltage of the buck-boost bridge circuit and keep the output voltage stable; and when an electronic cigarette is used, tobacco juice is almost exhausted, and the mistorizer resistance value detection module detects that the number of times when the resistance value of the mistorizer consecutively exceeds a dry burning protection set resistance value, exceeds a set number of times, the microcontroller instructs the buck-boost bridge circuit to turn off output, and the electronic cigarette automatically stops working.
Owner:HUIZHOU HAPPY VAPING TECH LTD
Motor locked-rotor protecting method of electric car electric driving system
ActiveCN102350958ASmall currentBurn out preventionSpeed controllerElectric energy managementElectricityElectric cars
The invention provides a motor locked-rotor protecting method of an electric car electric driving system, which can prevent a power tube in a driving motor controller from being burned by locked-rotor of a motor. The motor locked-rotor protecting method of the electric car electric driving system is characterized in that: a motor controller is arranged inside the electric car electric driving system, the motor is driven by a three-phase driving axle of the motor controller according to a torque requirement of an accelerator pedal, the motor controller is the key to instantly detect a motor rotation speed and a torque, timing is begun when the motor stops rotating, if a stalling lasting time t of the motor is more than or equal to a preset time T corresponding to the torque under the same torque Tq, the motor is judged to have locked-rotor, the torque requirement of the accelerator pedal is ignored by the motor controller after the locked-rotor of the motor happens, and the motor torque is unloaded until a non-locked-rotor state of the motor is detected.
Owner:CHERY AUTOMOBILE CO LTD
Active regeneration grading control method for particle trap
ActiveCN110925065AMonitor temperature in real timeReduce exhaust back pressureInternal combustion piston enginesExhaust apparatusParticle trappingEngineering
The invention discloses an active regeneration grading control method for a particle trap. The active regeneration grading control method aims to acquire the real-time carbon loading amount and temperatures of the particle trap. According to the carbon loading amount, a plurality of carbon loading limit values are determined, a plurality of temperature limit values are determined according to thetemperatures, the real-time carbon loading amount and the carbon loading amount limit values of the particle trap are compared, the real-time particle trap temperatures and the temperature limit values are compared, an active regeneration mode is determined, and the active regeneration mode is one or a combination containing more than one of the conditions that an engine is controlled to defer theignition angle, the air-fuel ratio becomes lean, and the idle speed is increased. According to the active regeneration grading control method for the particle trap, the mode of active regeneration isdetermined according to the regions where different carbon loading amount and the temperatures of the particle trap are located and the marking of the region, so that the carbon deposition is effectively removed in time when the carbon loading amount is too high, and the exhaust back pressure is reduced.
Owner:DONGFENG MOTOR CORP HUBEI
Planar antenna capable of switching wave beam for omnidirectional scanning within horizontal range
InactiveCN103700942AAchieve full coverageStable working conditionAntennasOmnidirectional antennaCapacitance
The invention provides a planar antenna capable of switching wave beams for omnidirectional scanning within a horizontal range. The antenna comprises an insulated substrate with a feed input port, a metallic grounding plate which is arranged on the lower surface of the substrate, emitters which are arranged on the upper surface of the substrate, control circuits of the emitters and a feed patch. By taking the feed patch as a center, the insulated substrate is equally divided into six areas; a control circuit is arranged in each area; one end of each control circuit is connected with the feed patch in the center through a blocking condense,r and the other end of each control circuit is connected with one emitter through a feeder; therefore, a relatively independent unit antenna is formed in each area. By switching the wave beams to cover the plane of the entire antenna, the whole coverage on the plane of the antenna is realized; since parameters except the radiation direction of each wave beam in the working state are consistent, the working state of the antenna provided by the invention is stable.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Experimental device for particle combustion under high speed air flow
InactiveCN105651809AMake sure it burnsControl initial temperatureMaterial heat developmentRamjetParticle combustion
The embodiment of the invention provides an experimental device for particle combustion under high speed air flow. The experimental device comprises a windowing test system, a pipeline supply system and a measuring-controlling system. Solid particles are fixed in high-temperature and high-speed combustion air; a current stabilizing segment and an experimental time sequence are designed, so that the particles fully burn in approximately-one-dimensional uniform high temperature airflow; quartz glass which is resistant to a high temperature of over 1,000 DEG C and is transparent and through which a particle combustion characteristic spectrum can penetrate through is taken as a material of a viewing window at a windowing test stage, and the ignition-combustion process of the particles is observed through the window, so that the ignition and combustion mechanisms of the particles in the high speed airflow are researched, and knowledge about the internal combustion process of a solid rocket ramjet containing the particles and a fuel-rich propellant is improved.
Owner:NAT UNIV OF DEFENSE TECH
Method and device for headset audio playing
InactiveCN103237277AImprove securityExtended service lifeEarpiece/earphone attachmentsComputer terminalHeadphones
The invention is applicable to the technical field of mobile terminals and provides a method and a device for headset audio playing. The device comprises an audio output unit outputting audio in a mobile terminal. When the audio output unit is a preset unit, the audio output unit detects whether a headset accesses into the mobile terminal or not. The preset unit comprises one or more of a loudspeaker, a sound box, a sound console, a power amplifier and a multimedia console. When the headset is detected to access into the mobile terminal, volume of the output audio is controlled to be proper. In the embodiment, when the headset is accessed into the mobile terminal, the volume of the output audio is controlled to be proper, volume of the headset is avoided from being high, eardrums of users are protected from damages, and burnout of the headset or sound distortion caused by disconnection and dislocation of a voice coil of the headset are avoided, thereby safety of the eardrums of the users playing the audio through the headset is improved, and service life of the headset is prolonged.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Circuit for detecting locked point current of micro motor
InactiveCN102323551AImprove reliabilityBurn out preventionCurrent/voltage measurementDynamo-electric machine testingComparators circuitsSwitching signal
The embodiment of the invention discloses a circuit for detecting a locked point current of a micro motor, which is used for accurately detecting the locked point current of the micro motor. The circuit for detecting the locked point current of the micro motor, disclosed by the embodiment of the invention, comprises the micro motor, an input power supply, a micro motor current sampling circuit, a switch and a comparer circuit, wherein the voltage value of the input power supply is variable, the input power supply is used for providing a working voltage to the micro motor; the micro motor current sampling circuit is used for sampling the current of the micro motor and generating a sampling voltage; one end of the switch is connected with the input power supply, the other end of the switch is connected with the micro motor, the switch is used for controlling the working state of the micro motor; one input end of the comparer circuit receives the sampling voltage, the other input end of the comparer circuit receives a reference voltage, the reference voltage and the input power supply are in a direct proportion relation, the comparison output end of a comparer outputs a switching signal used for controlling switching on and off of a drive switch.
Owner:SUPEC SUZHOU
High speed spindle box structure
ActiveCN104889425ANo bending deformationGuaranteed rotation accuracyLarge fixed membersMaintainance and safety accessoriesBall bearingDynamic balance
The invention discloses a high speed spindle box structure, and belongs to the machine tool part device field. The high speed spindle box structure comprises a spindle box, a spindle device, a front bearing seat, a rear bearing seat, a spindle drive mechanism, a cooling system, a lubrication system and a dynamic balance regulating mechanism, wherein a spindle of the spindle device is supported by a front bearing component and a rear bearing component, and installed in a spindle hole in the spindle box, bearings of the front bearing component are two pairs of front ball bearings and rear ball bearings, which are arranged at a certain interval, bearings of the rear bearing component are roller bearings, the cooling system comprises a spindle cooling mechanism and a bearing cooling mechanism which respectively have functions of cooling the spindle and cooling the interiors of the bearings, and the lubrication system comprises a front bearing lubrication mechanism and a rear bearing lubrication mechanism, and respectively have functions of lubricating the front bearing component and lubricating the rear bearing component. The high speed spindle box structure solves the problems that an existing spindle box mechanism is poor in cooling effect, temperature of bearings of the existing spindle box mechanism easily rise, and then rotation speed and processing accuracy of the existing spindle box mechanism are influenced.
Owner:浙江日发精密机床有限公司
Multi-stage intensifying auxiliary sintering type ignition holding furnace and use method of same
PendingCN107356119AIncrease freedomEnsure the effect of auxiliary sinteringCharge treatment typeFurnace typesPhase conversionEngineering
A multi-stage intensifying auxiliary sintering type ignition holding furnace comprises a sintering machine (1), an ignition device (2) and an auxiliary combustion device (3), wherein the sintering machine (1) has a trolley (1); the ignition device (2) and the auxiliary combustion device (3) are orderly arranged on the trolley (1); the auxiliary combustion device (3) has a hot air device (4), a blow-injection device (5) and an auxiliary combustion cover (6); the hot air device (4) has a hot air pipeline (401); and the blow-injection device (5) has a fuel gas total pipe (501), a fuel gas branch pipe (502), a blow-injection pipe (503) and a rack (504). The multi-stage intensifying auxiliary sintering type ignition holding furnace can replace coke by partial fuel gas and hot smoke and achieves sintering bed segregation coke distribution effect via phase conversion; blow-injection device adjustability and freedom can be enhanced; multi-procedure multi-medium coupling blow-injection can be achieved; and the multi-stage intensifying auxiliary sintering type ignition holding furnace has great safety performance and high sintering quality.
Owner:ZHONGYE-CHANGTIAN INT ENG CO LTD
Device for heating battery of electric car and its control method
ActiveCN102315502AEnsure heating uniformityHeating evenlyBatteries circuit arrangementsSecondary cellsEngineeringPower circuits
The invention provides a device for evenly heating a battery of an electric car which is convenient to control, and a control method thereof. The battery heating device comprises a battery bag with a plurality of battery monomers which are connected with each other, each battery monomer is placed in a heating sleeve possessing electric heating function, the key point is the anode of the battery bag is connected with a positive terminal of a charger through a first switch, the cathode of the battery bag is connected with a passive terminal of the charger though a second switch; the power supply of the heating sleeve is selectively connected with a power supply circuit of the battery bag or a power supply circuit of the charger through the first switch, the second switch and a third switch the first switch, the second switch and the third switch are controlled by a battery management system, the battery management system is respectively connected with the battery bag and the charger. According to the invention, the device for heating the battery of the electric car uses two power supplies for heating the battery bag, so that the battery bag can be internally and externally heated, and the heating can be uniform and rapid.
Owner:奇瑞新能源汽车股份有限公司
Protection circuit
InactiveCN103036203ADissipate heat in timeThe heat dissipation of the cooling device is timelyDigital data processing detailsEmergency protective arrangements for automatic disconnectionEngineeringThermistor
Provided is a protection circuit for preventing temperature of a peripheral circuit of an integrated circuit from being too high. The protection circuit comprises a detecting circuit, a switching element and a control chip. The control chip is used for controlling an existing cooling device to dissipate heat of the peripheral circuit. The detecting circuit is connected with the control chip through the switching element. The detecting circuit and a thermistor arranged adjacent to the peripheral circuit are used for detecting temperature of the peripheral circuit. When the temperature of the peripheral circuit exceeding a presupposed temperature value is detected by the detecting circuit through the thermistor, the control chip is triggered by the detecting circuit through the switching element to strengthen the dissipation effect of the cooling device until the temperature of the peripheral circuit is lower than the presupposed temperature value and is detected by the thermistor. If the heat dissipating device running at full speed is still unable to enable the temperature of the peripheral circuit to fall below the presupposed temperature value, the control chip stops the peripheral circuit from working.
Owner:HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
LED drive circuit
ActiveCN102740538AAvoid light decay acceleration or burnoutSmall working currentSemiconductor lamp usageElectric light circuit arrangementVoltage regulationLight source
The present invention relates to an LED drive circuit which includes a micro-control unit, a voltage protection unit and an LED light source. The voltage protection unit includes an under-voltage protection module, an overvoltage protection module and a reference voltage module. The under-voltage protection module includes a detection voltage input terminal and a reference minimum voltage input terminal. The overvoltage protection module comprises a detection voltage input and a reference maximum voltage input terminal. The reference voltage module provides reference minimum voltage to the under-voltage protection module and provides reference maximum voltage to the overvoltage protection module. The under-voltage protection module and a reference voltage regulation module are set, thus when input voltage is lower than rated minimum voltage, detection voltage is lower than the reference minimum voltage, and the LED light source is turned off. The overvoltage protection module and the reference voltage regulation module, thus when the input voltage is higher than rated maximum voltage, the detection voltage is higher than the reference maximum voltage, and the LED light source is turned off. The LED drive circuit can maintain a constant current characteristic and has the protection of under-voltage, overvoltage and overheating.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1
Methane and oxygen pre-mixer
InactiveCN101125282AEvenly distributedRemove in timeHydrogenFlow mixersNuclear engineeringPartial oxidation
The present invention relates to a methane and oxygen pre-mix device, mainly consists of a casing, a gas distributed system, a heat exchange system and a multiorifice gas distribution plate; the gas distributed system adopts the rotational flow or the circular flow gas distributed system; the rotational flow gas distributed system consists of a methane air intake system, an oxygen air intake system, an upper distributor and a lower distributor; the circular flow gas distributed system consists of center feed pipes, cross feed pipes and ring gas distributor of the methane and the oxygen; the heat exchange system consists of an upper separator, a lower separator, a centre internal pipe, an external pipe, a metal fin, a heat exchange medium inlet pipe and a heat exchange medium outlet pipe; via the gas distributed system, the methane and the oxygen have a preliminary mixture in a smaller space, then by the stimulant fluidized bed consisting of the centre internal pipe, the external pipe and the metal fin, circuitously flowing upwards, achieving a molecular level mixture at the exit. The present invention effectively increases the pre-mix effect and guarantees the inflaming retarding and explosion prevention of the pre-mix chamber, having a good function in the industry of methane partial oxidation to syngas.
Owner:TSINGHUA UNIV
Practical training device capable of detecting wiring correctness of circuit automatically
ActiveCN104933928ASo as not to damageCause damageElectrical testingEducational modelsElectricityControl power
The invention discloses a practical training device capable of detecting the wiring correctness of a circuit automatically. The practical training device is provided with electrical parts for practical training and wiring sockets, the wiring sockets correspond to pins of each electrical part respectively, and an operator of practical training can connect corresponding wiring sockets via leads so that the electrical parts corresponding to the wiring sockets are connected to form a target practical training circuit. The practical training device is characterized in that the electrical parts for practical training comprise a controlled power supply which is used to supply power to the target practical training circuit, the practical training is also provided with a relay device and a controller, the relay device is provided with groups of changeover contacts, each group of changeover contacts corresponds to one pin of one electrical part, and each pin of each electrical part can work in the wiring, detecting and experimental modes by being connected to the controller via the corresponding changeover contacts and wiring socket. The practical training device is used for practical training of circuit wiring, and the electrical parts for electrical training can be avoided from damage caused by wiring mistakes of the operator.
Owner:陈辉 +4
Method for calculating switching-off and switching-on time of breaker and stroke of moving contact of breaker
InactiveCN103487748AReduce pollutionBurn out preventionCircuit interrupters testingMiniaturizationEngineering
The invention discloses a method for calculating the switching-off and switching-on time of a breaker and the stroke of a moving contact of the breaker. According to the method, first, a switching-on operating coil starts to be powered on after the breaker receives a switching-on instruction, the coil generates sufficient electromagnetic force to push an iron core to move along with increasing of current so that an energy storage mechanism can be started to release energy to generate acting force for driving the moving contact to move, then, the moving contact can make contact with a fixed contact and arrive at a position where switching-off is just achieved at the moment, and the stoke of the moving contact is called as idle stroke before; second, the moving contact continues moving on to arrive at the switching-on position and keeps a switching-on state with a mechanism, and the process is called as over-stroke; the stroke distance of the moving contact is the sum of the idle stroke distance and the over-stroke distance; in the switching-off process, the first step and the second step are repeated in the same way. The method is simple in algorithm, easy to realize in an embedded system, capable of lowering cost effectively and beneficial to miniaturization of the system. The moment when the moving contact of the breaker starts to move and the moment when the moving contact of the breaker stops moving can be accurately acquired.
Owner:XUCHANG UNIV
Smart card connecting circuit for electronic equipment and electronic equipment
ActiveCN103094793ABurn out preventionSolve the technical problem that it is easy to be burned out when it is out of the deckDigital data processing detailsCoupling device detailsTablet computerPersonal computer
Owner:HUAWEI DEVICE CO LTD
Novel process for making synthetic natural gas by using coke-oven gas
ActiveCN101818087APrevent sulfur poisoningGood recovery of waste heatGaseous fuelsChemistryCoke oven gas
The invention belongs to the field of the comprehensive utilization of coke-oven gas, and discloses a novel process for making synthetic natural gas by using the coke-oven gas. The qualified synthetic natural gas product is produced by the process comprising the steps of hydrodesulfurization, carbon compensation, multi-level methanation, cooling, separation and the like. The process can effectively prevent the temperature runaway phenomenon of a methanation reactor, can reasonably distribute the load of the methanation reactor, improves the conversion rate of CO and CO2, and provides a new method for making the synthetic natural gas by using the coke-oven gas.
Owner:NANJING GOODCHINA CHEM TECH
Intelligent electrically-operated check valve
ActiveCN104482256ASignificant progressExtended service lifeDomestic stoves or rangesOperating means/releasing devices for valvesCouplingEngineering
The invention provides an intelligent electrically-operated check valve. The intelligent electrically-operated check valve comprises a check valve support, an air duct, a check valve plate, a magnetic seal ring and an intelligent controller, wherein the air duct is arranged on the check valve support; the check valve plate arranged in the air duct is perpendicular to the axis of the air duct; a pin roll enabling the check valve plate to rotate is arranged in the air duct; the magnetic seal ring fixedly arranged on the inner wall of the air duct consists of two half magnetic seal rings positioned on the upper and lower sides of the check valve plate, and is used for sealing a gap between the check valve plate and the inner cavity of the air duct; the intelligent controller is fixed on the check valve support, is connected with the pin roll through a coupling, and is used for controlling the rotation of the pin roll; micro switch sensors are arranged on the check valve support on two sides of the coupling; the coupling is provided with two mutually perpendicular contacts along the direction perpendicular to the axis of the coupling. The intelligent electrically-operated check valve adopts integrated arrangement, is simple in structure and convenient to use, and prevents a motor from starting at negative pressure or being blocked.
Owner:江西厨味洁消防设备有限公司
General high-efficiency long-life driving circuit for wide voltage non-inductance semiconductor illumination
InactiveCN102238766AIngenious designSimple designApparatus without intermediate ac conversionElectric light circuit arrangementCapacitanceEngineering
The invention relates to a semiconductor illuminating lamp, in particular to a general high-efficiency long-life driving circuit for wide voltage non-inductance semiconductor illumination. According to the driving circuit disclosed by the invention, the traditional switching power supply and complex circuit topology of a PWM (Pulse Width Modulation) control mode are thoroughly changed, an output capacitor is charged and a load is powered by adopting directly-rectified commercial power, and the charging state of the output capacitor is controlled by utilizing the on-off of a field effect transistor; the on-off of the field effect transistor is controlled by a current flowing through the load so that the stability of an output current is ensured; a current of an LED (Light Emitting Diode) can be effectively controlled in an appropriate range so that the LED is prevented from being burned-out due to lightning effects of power transmission lines and affects of surge currents in switching on / off; and the driving circuit can be manufactured into a standard module, is suitable for large-scale industrialized production and has the advantages that the circuit design is ingenious, the whole circuit is very concise, the cost is low, no large-capacity capacitor is needed, the current stability is high, and the whole life is greatly prolonged, which can be close to the theoretical life about one hundred thousand hours of a semiconductor.
Owner:CHENGDU SURESUN TECH
Device for adsorbing, desorbing and purifying organic gas
InactiveCN101209390AIncrease concentrationBurn out preventionDispersed particle separationCombustorAtmospheric air
The invention discloses an organic gas adsorption, desorption and purification device in the field of waste gas purification equipment and comprises a filtering device, an outlet of which is connected with an adsorption device, and an outlet of the adsorption device is communicated with air through an air exhauster, the adsorption device comprises two adsorption towers which are serially connected and arranged; an inlet valve and an outlet valve are respectively arranged at an inlet and an outlet of the adsorption towers, active carbon adsorptive filtering material is arranged inside the adsorption towers, and a circulating wind outlet is arranged behind the inlet valve, a circulating wind inlet is arranged in front of the outlet valve, disconnecting valves are arranged on corresponding pipelines of the circulating wind inlet and outlet; furthermore, a fire arrestor, a waste gas burner and a circulating fan are connected between the circulating wind outlet and the circulating wind inlet through circulating wind pipes; one part of the exhausted gas of the waste gas burner is exhausted into the circulating wind inlet through the circulating fan and the other part of the exhausted gas is directly exhausted into air, and a cooling fan is arranged at one side of the circulating wind inlet. The invention can implement adsorption, desorption and purification at the same time, thus improving working efficiency, being applicable for industrial production which needs to process organic waste gas.
Owner:吴万权
Reconfigurable substrate integrated waveguide bandpass filter and reconfigurable method of filter
ActiveCN105870553AReconfigurableSimple methodWaveguide type devicesSplit-ring resonatorVoltage source
The invention discloses a reconfigurable substrate integrated waveguide bandpass filter and a reconfigurable method of the filter and mainly solves technical problems that the tuning range is small, the insertion loss of reconfigurable substrate integrated waveguide bandpass filters is high and control voltage of variable capacitance diodes cannot be directly applied to substrate integrated waveguides. One variable capacitance diode is placed in a non-metal via hole formed in the center of each of two complementary split-ring resonators of the bandpass filter, the metal part at an inner ring opening of each complementary split-ring resonator is replaced with a blocking capacitor, so that a substrate integrated waveguide is separated from an outer circuit, and a voltage source is prevented from being short-circuited; the variable capacitance diodes are connected with a direct-current bias circuit, reversed bias voltage at two ends of the variable capacitance diodes is adjusted, junction capacity of the variable capacitance diodes is changed, so that the resonant frequency of the two complementary split-ring resonators is affected, and the passband center frequency is reconfigurable. The feeding manner of the variable capacitance diodes in the substrate integrated waveguide is realized, the control manner is simple and easy to implement, the frequency tuning range is relatively large, the in-band insertion loss is low, and the filter can be applied to a wireless communication system.
Owner:XIDIAN UNIV +1
LED (light-emitting diode) drive control circuit
ActiveCN102143640ARealize multiplexingReduce voltageElectric light circuit arrangementEnergy saving control techniquesCurrent limitingEngineering
The invention discloses a LED (light-emitting diode) drive control circuit, which comprises an LED load sampling port, a switch port and a comparison port. An error amplifier module compares the LED load sampling voltage with the reference voltage and amplifies the LED load sampling voltage; a comparison module feeds the voltage of the comparison port and the current sampling signal to a logic processing module after comparing the voltage of the comparison port and the current sampling signal are compared; an open circuit detection protection module detects whether a LED load is open-circuited, detects the duration of the open circuit and outputs the open circuit status signal, an output for a first output end of the open circuit detection protection module and an output of the error amplifier module commonly control the voltage of the comparison port, and a second output end of the open circuit detection protection module outputs the current limiting threshold; a current limiting module feeds the current limiting threshold and the current sampling signal to the logic processing module after the current limiting threshold and the current sampling signal are compared; the logic processing module processes the logic of an input, and the output controls the switch of a power tube through a drive module. The LED drive control circuit prevents the current of an inductor of the LED drive circuit from rapidly rising and avoids the LED load and the power tube being burnt after the LED load is switched on.
Owner:HANGZHOU SILAN MICROELECTRONICS
Heating device for gas humidifier
ActiveCN103055400AAvoid electric shockEasy for daily maintenanceRespiratorsHuman–machine interfaceEngineering
The invention discloses a heating device for a gas humidifier. The heating device comprises a casing, a heating disc assembly and a center control module. The heating disc assembly is provided with a heating disc and is installed on the casing, and the heating disc is exposed above the casing. The center control module comprises a power source assembly, a human-computer interface and a main control circuit board assembly, wherein the power source assembly and the main control circuit board assembly are fixedly installed on the casing and accommodated in the casing, and the human-computer interface is installed on the casing and exposed on the side of the casing. The human-computer interface is electrically connected with the power source assembly and the main control circuit board assembly and operates the center control module by controlling and sending data. By optimal design of the casing, danger of burning and scalding and faults such as open circuit are effectively avoided, and danger of electric leakage and electric shock can be effectively avoided by optimal design of the heating disc assembly. By optimal design of the center control module, a whole humidifying system is high in intelligence degree, safe and reliable.
Owner:VINCENT MEDICAL (DONG GUAN) MFG CO LTD
Multi-component simulative engine applied to vacuum plume effect experimental research and ignition scheme thereof
InactiveCN103644044ASimple planGood for processing and weldingRocket engine plantsCombustion chamberProduct gas
The invention discloses a multi-component simulative engine applied to vacuum plume effect experimental research and an ignition scheme thereof. The multi-component simulative engine comprises a pre-combustion chamber head part, a pre-combustion oxygen supplementation chamber, a thrust chamber head part and a thrust chamber body part, wherein the pre-combustion chamber head part is tightly connected with the pre-combustion oxygen supplementation chamber, and the pre-combustion oxygen supplementation chamber, the thrust chamber head part and the thrust chamber body part are connected tightly and sequentially. The ignition scheme comprises working medium input, ignition time sequence and pre-combustion chamber capacity design. According to the invention, a propellant working medium is input through an ignition incendiary agent welding nozzle, an ignition oxidant welding nozzle and an oxygenating agent welding nozzle, and simulation of combustion products of different real engines can be realized by matching different incendiary agents, oxidants and other gases.
Owner:BEIHANG UNIV
LED driving power supply control circuit and LED lamp by using same
InactiveCN101715265BLuminous stabilityStable jobAc-dc conversion without reversalElectric light circuit arrangementOvervoltageAlternating current
The invention relates to an LED driving power supply control circuit. The LED driving power supply control circuit comprises an EMI filter and rectifier module, a DC-DC isolation constant current driver module, an input under-voltage lag protection module, and an output current protection module, wherein the EMI filter and rectifier module is used for performing EMI filter and full-wave rectification on an alternating-current voltage input by a power supply to generate a direct-current voltage; the DC-DC isolation constant current driver module is used for processing the direct-current voltage so as to generate a constant output current for the work of the LED power supply; the input under-voltage lag protection module is used for clamping and splitting the direct-current voltage so as togenerate an enable signal and controlling the DC-DC isolation constant current driver module to start or not to start according to the enable signal; and the output current protection module is used for detecting the constant output current and controlling the DC-DC isolation constant current driver module to stop generating the output current while the constant output current exceeds a current threshold. The invention also relates to an LED lamp. The LED driving power supply control circuit and the LED lamp realize the alternating-current inputting and constant-current outputting in a wide range and have the input clamping lag protection and the output overvoltage protection functions.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +1
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