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37results about How to "Reduce the rise" patented technology
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Modularized multi-lever converter with direct-current fault ride-through capacity
ActiveCN104078994ASimple circuit structureReduce manufacturing costElectric power transfer ac networkEmergency protective circuit arrangementsModularityEngineering
The invention provides a modularized multi-level converter with the direct-current fault ride-through capacity, wherein modules are divided into the first module and the second module. The structure of the first module is the same as the structure of a module in a traditional modularized multi-level converter, and a few semiconductor switches, a few diodes and a few damping resistors are added to the second module on the basis of the first module. The first module and the second module both have the level superposition function, but only the second module has the direct-current fault ride-through capacity. The modularized multi-level converter with the direct-current fault ride-through capacity not only can achieve the functions of a traditional modularized multi-level converter, but also has the direct-current fault ride-through capacity. Compared with an existing modularized multi-level circuit with the direct-current fault ride-through capacity, the circuit of the modularized multi-level converter is provided with fewer devices and simple in structure. The modularized multi-level converter is applicable to modulation and control strategies of the traditional modularized multi-level converter, applicable to high-voltage high-power occasions and particularly suitable for the high-voltage direct-current power transmission field in which a modularized multi-level converter is applied and prone to direct-current faults.
Owner:SOUTHEAST UNIV
Direct-current (DC) side voltage balance control method for chain type static synchronous compensator
InactiveCN102931666AReduce the riseFlexible AC transmissionReactive power adjustment/elimination/compensationDistribution controlControl power
The invention relates to a direct-current (DC) side voltage balance control method for a chain type static synchronous compensator, belonging to the field of power distribution control technologies. According to the method, the basic steps for controlling DC side voltage balance by a control circuit are as follows: the trigger pulse width of each H bridge is obtained by a master control CPU (Central Processing Unit) according to real-time acquired signals; a corresponding sequence relationship table is stored in a programmable logic controller (PLC); DC side voltage signals acquired in real time are subjected to real-time sequencing; a corresponding trigger pulse width sequence is obtained from the corresponding sequence relationship table according to the real-time sequencing; and each trigger pulse width is sequentially output to corresponding H bridges according to the trigger pulse width sequence to be used for controlling the on / off of full-controlled power electronic devices of all the H bridges as required. According to the DC side voltage balance control method for the chain type static synchronous compensator, the widest trigger pulse is allocated to the H bridge with the lowest DC side capacitance voltage currently, and the narrowest trigger pulse is allocated to the H bridge with the highest DC side capacitance voltage currently, so that the DC side capacitance voltage of all the H bridges can be favorably balanced as soon as possible.
Owner:XI AN JIAOTONG UNIV
Agricultural planting greenhouse with automatic cooling function
InactiveCN110810077AReduce gasReduce direct sunlightClimate change adaptationGreenhouse cultivationThermal dilatationAgricultural science
The invention discloses an agricultural planting greenhouse with an automatic cooling function, which comprises a greenhouse body composed of support plates fixedly connected to a ground and a greenhouse framework; the two vertical plates are symmetrically and fixedly connected to the ground, a hollow plate is fixedly connected to the upper ends of the vertical plates, air guide plates are uniformly distributed on and communicated with opposite side walls of the hollow plate, and one end, far away from the side wall of the hollow plate, of each air guide plate is fixedly connected with a sun-shading plate that is of hollow structure. According to the invention, when external sunlight irradiation temperature rises in the noon, a thermal expansion liquid expands rapidly, so that air is introduced into the sun-shading plates that stretch to shield greenhouse protective film, the direct irradiation of sunlight to the greenhouse is reduced, the rise range of the temperature in the greenhouse is narrowed; when the external sunlight irradiation temperature falls, the thermal expansion liquid contracts so that the air in the sun-shading plates contracts less, manually laying and removing sunshade net is prevented, and the workload of people is reduced.
Owner:薛尧文
LED (Light-Emitting Diode) lamp tube
InactiveCN103032735AReduce the riseReduce usageNon-electric lightingPoint-like light sourceEngineeringLight tube
The invention relates to an LED (Light-Emitting Diode) lamp tube which is characterized by comprising a transparent lamp tube, an LED illumination module and end covers, wherein the LED illumination module is arranged in the transparent lamp tub; both ends of the transparent lamp tube are respectively provided with stems; the end covers cover the peripheries of the stems; the stems are in vacuum seal fit with the transparent lamp tube; and vacuum sealed cavities formed by the stems and the transparent lamp tube are filled with inert gas. The LED lamp tube has the beneficial effects that 1, the stems are in vacuum seal fit with the transparent lamp tube and the inert gas is filled, so that heat of the LED illumination module arranged in the transparent lamp tube is rapidly dissipated by the inert gas, the rising amplitude of temperature rising is reduced and the service life is prolonged; 2, a radiator is avoided being used, the weight is reduced and cost is reduced; 3, in an LED light emitting source, except an LED chip, other components and fixing glue are all made of light transmitting materials, thus favorably enabling a light emitting angle of the LED chip to be equal to 4pi, avoiding dizziness and improving use comfort.
Owner:浙江榆阳电子股份有限公司
Driving device of stepping motor
InactiveCN101409525ASolve the problem of not being able to sufficiently reduce power consumptionReduce power consumptionDynamo-electric converter controlMotor driveEngineering
The present invention provides a stepping motor drive device, which has high efficiency as a drive device of a stepping motor of a sewing machine. The drive device (7) of the stepping motor includes: an H-bridge circuit, which has FET (11-14) connecting coils (4, 5) with a power supply unit (6); as well as a drive circuit (20), controlling the current flowing through the coils (4, 5) by controlling the switching on / off of the FET (11-14). The drive circuit 20 makes the current generated by the self-induction of the coils (4, 5) returns back to the coils themselves when the stepping motor (1) stops.
Owner:JUKI CORP
Acidification and profile control integrated method
InactiveCN104213885AMake sure to fill with waterWater injection pressure does not riseFluid removalAbsorption capacityEngineering
The invention relates to an acidification and profile control integrated method. The method includes the following steps of analyzing the development history of oil deposit and the current situation of a water injection well, and screening a high-pressure water injection well; conducting acidification processing, wherein acid liquid matched with a target stratum is rapidly injected into the stratum through a high-pressure pump truck on the premise of the pressure lower than the stratum breakage pressure, the acid liquid is made to permeate the stratum to corrode blocking objects in hole gaps, hole space is enlarged, the diversion capacity of the stratum is restored or improved, and the water injection pressure is reduced; conducting profile control processing, wherein acid-resistant profile control agents are injected into the target stratum, highly-permeable bands with the high water absorption capacity are blocked, and a permeation channel where water is injected is changed. By means of the acidification and profile control integrated method, profile control is conducted on high-pressure water injection caused by pollutant blockage in the immediate vicinity of wellbore, the aim of improving water injection developing effect is achieved, and it is ensured that water injection can still be normally executed after profile control.
Owner:PETROCHINA CO LTD
Water curtain box for ammonia gas absorption of livestock breeding house
ActiveCN104304038AConstant total waterControl water speedAnimal housingBird housingsLivestock breedingWater channel
The invention belongs to a water curtain box for ammonia gas absorption of a livestock breeding house. The water curtain box comprises a box body and a water curtain box base arranged at the bottom of the box body, the box body is provided with front aerating plates and lateral aerating plates, a water inlet and a water outlet are arranged below the lateral aerating plates, the bottom of the box body is provided with a water sink, an annular water channel is arranged on the periphery of the water sink, wet curtain plates are arranged in the annular water channel, an annular water pipe is arranged on the upper sides of the wet curtain plates, the bottom of the annular water pipe is provided with water holes, and an axial fan, a floater switch and an air cooler water pump are arranged at the inner bottom of the box body. The water curtain box base comprises a bottom plate, vertical plates and surface plates. The wet curtain plates are arranged on the periphery of the water curtain box, water in the water sink cyclically flows in the wet curtain plates via the axial fan and the air cooler water pump, ammonia gas is repeatedly absorbed, concentration of the ammonia gas in the breeding house is effectively reduced, growth speed and feed conservation ratio of livestock are increased, disease rate of the livestock is decreased, cost of enterprises is saved, and environmental pollution caused by discharge of the ammonia gas is avoided.
Owner:HENAN UNIV OF ANIMAL HUSBANDRY & ECONOMY
Terminal, temperature control method thereof and computer readable storage medium
PendingCN110750148AReasonable temperature controlReduce the temperatureDigital data processing detailsTemperature controlProcess engineering
The invention discloses a temperature control method of a terminal, the terminal is provided with a temperature sensor, the temperature sensor is used for detecting the temperature of the terminal, and the temperature control method of the terminal comprises the following steps: acquiring the temperature of the terminal; and when the terminal meets the cooling condition, carrying out preset rule processing on the terminal so as to reduce the temperature of the machine body or reduce the rising amplitude of the temperature of the machine body. The invention further provides a terminal and a computer readable storage medium. The temperature control of the terminal is reasonable.
Owner:SHANGHAI TRANSSION CO LTD
Purification method of Lyocell spinning coagulating bath recovery liquid
PendingCN111943340AReduce processing burdenAdded decolorization stepWater/sewage treatment by degassingWaste water treatment from textile industrySolubilitySpinning
The invention discloses a purification method of a Lyocell spinning coagulating bath recovery liquid. The method comprises the following steps: adding a decolorizing agent into a coagulating bath to-be-recovered liquid after Lyocell spinning to perform decolorizing treatment, flocculating and clarifying the decolorized solution, and introducing ion exchange resin to recover. According to the purification method provided by the invention, the decolorizing agent with a special structure is adopted to remove the chromophoric substances with high solubility in the coagulating bath to-be-recoveredliquid, and after purification, the change of the conductivity of the to-be-recovered liquid is relatively small, so that the service lifetime of ion exchange resin used in a subsequent recovery stepcan be greatly prolonged, and the purification method is suitable for popularization and application.
Owner:CHINESE TEXTILE ACAD
Energy-saving drying method for keeping quality of grain
ActiveCN103918784AIncrease contact timeImproves moisture uniformityClimate change adaptationSeed preservation by dryingHeating timeContact time
The invention discloses an energy-saving drying method for keeping the quality of grain. The drying method comprises the steps of drying in a segmenting and layering way by means of transverse flow; absorbing the energy of hot air wholly absorbed by grain by increasing the thickness of a grain layer through which the hot air passes, prolonging the contact time between the hot air and the grain, and enhancing the heat energy exchange effect; introducing the dry hot air which is discharged out of a hot air drying section and a grain temperature cooling section and has a certain drying capability into a waste heat drying section to carry out the waste heat drying; discharging the waste gas which is approximate to be saturated out of the waste heat drying section, thus fully utilizing the heat energy. Therefore, the un-buffered fast and continuous drying of the grain can be realized, the grain drying and heating time can be shortened, and the ascending range of the fatty acid value can be reduced.
Owner:杨庆询
Decelerating wear-resisting device and boiler furnace equipped therewith
ActiveCN102242928AEliminate wear and tearEliminates side spoiler wearFluidized bed combustionApparatus for fluidised bed combustionBoiler furnaceHeat transmission
The invention provides a decelerating wear-resisting device and a boiler furnace with same. The decelerating wear-resisting gear comprises a plurality of decelerating wear-resisting shroud rings arranged in parallel, wherein each decelerating wear-resisting shroud rings comprises a shroud ring main body, pins and a plurality of shims; the pins are fixedly connected with the boiler furnace, and the shroud ring main body is paved on the pins; the plurality of shims are arranged between two adjacent decelerating wear-resisting shroud rings; and two ends of each shim respectively extend towards two adjacent decelerating wear-resisting shroud rings. The decelerating wear-resisting device provided by the invention can be directly arranged on the heated surface in the furnace so as to avoid large-area change of the heated surface, has lower cost, and is provided with the shims between the wear-resisting shroud rings so as to effectively eliminate edge wall flow wear and lateral turbulent flow wear of air flow; and in addition, the decelerating wear-resisting device has certain heat transmission performance per se, thereby effectively reducing the raising range of temperature at the dense phase area of a circulating fluidized bed after the device is installed.
Owner:HUANENG CLEAN ENERGY RES INST
Ultrasonic atomization sheet and ultrasonic atomizer
PendingCN111974661AImprove atomization efficiencySmall footprintMechanical vibrations separationLiquid spraying apparatusUltrasonic atomizationAlternate current
The invention discloses an ultrasonic atomization sheet and an ultrasonic atomizer. The ultrasonic atomization sheet comprises a piezoelectric ceramic plate and a vibration plate, wherein the piezoelectric ceramic plate is arranged on the vibration plate, an overlapping region is arranged between the piezoelectric ceramic plate and the vibration plate as viewed from the thickness direction, the area of the overlapping region accounts for 50% or more of the area of the piezoelectric ceramic plate, opposite electrodes are arranged on the two opposite surfaces of the piezoelectric ceramic plate or / and between the two opposite surfaces of the piezoelectric ceramic plate to form one or more piezoelectric active areas, alternating current is applied between the electrodes to enable the ultrasonic atomization piece to vibrate in the thickness direction of the ultrasonic atomization piece, the piezoelectric ceramic plate and the vibration plate are basically or generally square flat bodies, and the piezoelectric ceramic plate is free of through holes. According to the ultrasonic atomization piece, the occupied space is basically unchanged, the atomization efficiency is remarkably improved,or the occupied space is remarkably reduced due to the basically unchanged atomization efficiency, during atomization, the temperature rise range is reduced, the noise is reduced, the possibility ofdamage is low, and the mechanical strength is improved; and the size is reduced, lightness and thinness are achieved, and carrying is convenient.
Owner:钟术光
Composition for reducing fishing and transportation stress of fishes as well as preparation method and application of composition
ActiveCN113134049AReduce the riseReduce mortalityNervous disorderHydroxy compound active ingredientsFlosAnimal science
The invention relates to a composition for reducing fish catching and transportation stress and a preparation method and application thereof, and belongs to the technical field of fishery breeding. The composition is prepared from the following components in parts by weight: 10 to 40 parts of flos daturae, 10 to 40 parts of Atropa belladonna, 5 to 20 parts of rhizoma arisaematis, 5 to 25 parts of semen ziziphi spinosae, 5 to 25 parts of pepper, 5 to 25 parts of mint and 1 to 5 parts of multivitamins. The composition has a good sedative effect, proper anesthesia depth and small damage to the liver, and can improve the immunity of live fishes, reduce caught casualties of fishes cultured in a pond, reduce the death rate of caught fishes in the transportation process and improve the survival rate of the caught fishes in temporary culture or re-culture.
Owner:湖南渔经生物技术股份有限公司 +1
Ultrasonic atomizer
PendingCN111790586AImprove atomization efficiencyReduce the riseMechanical vibrations separationLiquid spraying apparatusComposite materialUltrasonic atomization
The invention relates to an ultrasonic atomizer. The ultrasonic atomizer comprises an ultrasonic atomization sheet and a porous body. The ultrasonic atomization sheet comprises a piezoelectric ceramicplate and a vibrating plate. The piezoelectric ceramic plate is arranged on the vibrating plate, opposite electrodes are arranged on two opposite surfaces of the piezoelectric ceramic plate and / or between the two opposition surfaces of the piezoelectric ceramic plate as piezoelectric active areas, the porous body is arranged on the surface of the ultrasonic atomization sheet, and an alternating current is applied between the two electrodes, so that the ultrasonic atomization sheet vibrates in a thickness direction of the ultrasonic atomization sheet, and a liquid in the porous body can be atomized by means of vibration. The atomizer improves the atomizing efficiency remarkably; the temperature raising range is decreased remarkably and the noise is reduced remarkably during atomization, the ultrasonic atomizer is unlikely to damage, and the mechanical strength is improved remarkably; the ultrasonic atomizer can be used in a microminiature portable device, and is reduced in size, lightand thin and convenient to carry; and the ultrasonic atomizer is relatively more in application.
Owner:钟术光
Protection device for direct-current distribution network and protection method thereof
ActiveCN109921396AImprove reliabilityReduce the riseEmergency protective circuit arrangementsElectricityCurrent limiting
The embodiment of the invention discloses a protection device for a direct-current distribution network and a protection method thereof, wherein the direct-current distribution network comprises an inverter and a multi-stage power distribution device; the protection device for the direct-current distribution network comprises a current limiting module, wherein the input end of the inverter is electrically connected with a power supply end of the direct-current distribution network; the input end of the current limiting module is electrically connected with the output end of the inverter; the incoming end of the first-stage power distribution device is electrically connected with the output end of the current limiting module; the current limiting module is used to limit the output current of the current limiting module to be a second preset current when the output current of the current limiting module is greater than a first preset current and to control the input end and the output end of the current limiting module in a current direct-connection state when it is monitored that the output current of the current limiting module is smaller than a third preset current. The technicalscheme provided by the embodiment of the invention can improve the reliability of power supply of the direct-current distribution network and avoid the situation that one part breaks down and the whole network is paralyzed.
Owner:JIANGSU ELECTRIC POWER CO +2
Dangerous goods transport vehicle carriage with high safety performance
InactiveCN112440853AImprove securityTo prevent the phenomenon of tiltingLoad securingItem transportation vehiclesHazardous materials transportationCarriage
The invention discloses a dangerous goods transport vehicle carriage with high safety performance, which comprises a transport vehicle body, a carriage body, a connecting block, a protective layer androllers, and is characterized in that the carriage body is fixed on the upper surface of the transport vehicle body, a third spring is fixed on the rear side of the connecting block, a rotating shaftis arranged on the front surface of the connecting block, a connecting rod is installed on the surface of the rotating shaft, a fixing block is arranged on the surface of the rotating shaft, a secondspring is fixed to the lower surface of the fixing block, a bearing plate is fixed to the upper end of the fixing block, and a sliding frame is fixed to the surface of the right side in the carriagebody. According to the dangerous goods transport vehicle carriage with the high safety performance, the protective layer is arranged, the rising speed of the temperature in the carriage body due to the fact that the sun irradiates the carriage body can be decreased, meanwhile, by increasing the flow speed of air, heat in the carriage can be rapidly transferred out through the outer wall of the carriage body, and the safety of dangerous goods is further protected.
Owner:昆山市尚升危险废物专业运输有限公司
Washing method of ternary precursor
PendingCN114180647AExcellent washing consistencyEasy to dryNickel compoundsChemistryProcess engineering
The invention provides a washing method of a ternary precursor, which is characterized in that through multi-stage alcohol washing, on the premise of ensuring that various properties of a washed to-be-dried material are equivalent to those of a to-be-dried material in a conventional washing process, moisture contained in the to-be-dried material is less, and the to-be-dried material is easier to dry. According to the washing method of the ternary precursor, a washing procedure in a back-end program of an existing washing procedure is replaced by at least two stages of echelon multi-stage washing procedures, and the mass fraction of an alcoholic solution in the back washing procedure is higher than that of an alcoholic solution in the front washing procedure. The washing process follows the basic principle of washing for a small amount and multiple times, the washing consistency is better, and on the premise that it is guaranteed that all properties of the washed to-be-dried material are basically equivalent to those of the to-be-dried material in the conventional washing process, moisture contained in the to-be-dried material is less, and the to-be-dried material is easier to dry.
Owner:HUNAN BRUNP RECYCLING TECH +2
Sorghum bran extract product, and preparation method and application thereof
The invention discloses a sorghum bran extract product, and a preparation method and an application thereof. The method comprises the following steps: crushing sorghum bran, adding an ethanol-acetone-water mixed liquid, extracting, filtering, and concentrating to obtain an extract; and dissolving the extract in a ethanol solution, carrying out Sephadex LH20 column chromatography separation and purification several times, collecting the obtained eluate, concentrating to obtain a new extract, and carrying out vacuum drying on the new extract to obtain the sorghum bran extract product. The preparation method has the advantages of simplicity, easy operation, economy and practicality; and the prepared sorghum bran extract product has high inhibition ability on alpha-amylolytic enzyme and alpha-glucosidase, can be added into foods (such as noodles) to effectively reduce the rising range of postprandial blood glucose, can continuously and slowly provide energy for a long time to prevent hypoglycemia, and is especially suitable for being eaten by diabetic patients and obesity patients.
Owner:苏州工业园新国大研究院 +1
Separator for battery and method for producing same
PendingCN114207927AReduce the riseInhibit heat shrinkageHybrid capacitor separatorsCell seperators/membranes/diaphragms/spacersPolyolefinElectrical battery
The present invention relates to a battery separator comprising a polyolefin porous film and a heat-resistant porous layer provided on at least one surface of the polyolefin porous film, the heat-resistant porous layer comprising barium sulfate particles and an organic synthetic resin component, the content of the barium sulfate particles, the increase in gas resistance per 1 [mu] m thickness of the heat-resistant porous layer, the shrinkage rate when left to stand for 1 hour in a 130 DEG C atmosphere, and the hydrogen sulfide concentration are within predetermined ranges.
Owner:TORAY IND INC
Battery, and positive electrode plate and roll core thereof
InactiveCN110061181ALower internal resistanceReduce the increase in surface temperatureFinal product manufactureSecondary cellsElectrical batteryInternal resistance
The invention relates to the field of lithium ion batteries, and provides a battery, and a positive electrode plate and a roll core thereof, which are used for solving the problems of slow charging and quick temperature rise of the battery. The battery comprises tabs and electrode plates; the number of the tabs is not less than 1; at least one of the tabs is located in the middle of the corresponding electrode plate; the front surface of the corresponding electrode plate is connected with a first active layer; the back surface of the corresponding electrode plate is connected with a second active layer; the first active layer and the second active layer are composed of positive electrode active substances; and the surface density of the positive electrode plate is 160-220g / m<2>. The internal resistance of the battery can be reduced; and the rising amplitude of the surface temperature in a charging process of the battery can be reduced.
Owner:佛山市实达科技有限公司
Display panel, driving method thereof and display device
InactiveCN114241974AReduce the number of sub-pixelsReduce the riseStatic indicating devicesDisplay deviceEngineering
Owner:SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
Water curtain box for ammonia absorption in livestock and poultry houses
ActiveCN104304038BConstant total waterIncreased flow distanceAnimal housingBird housingsPoultry farmerLivestock breeding
The invention belongs to a water curtain box for ammonia gas absorption of a livestock breeding house. The water curtain box comprises a box body and a water curtain box base arranged at the bottom of the box body, the box body is provided with front aerating plates and lateral aerating plates, a water inlet and a water outlet are arranged below the lateral aerating plates, the bottom of the box body is provided with a water sink, an annular water channel is arranged on the periphery of the water sink, wet curtain plates are arranged in the annular water channel, an annular water pipe is arranged on the upper sides of the wet curtain plates, the bottom of the annular water pipe is provided with water holes, and an axial fan, a floater switch and an air cooler water pump are arranged at the inner bottom of the box body. The water curtain box base comprises a bottom plate, vertical plates and surface plates. The wet curtain plates are arranged on the periphery of the water curtain box, water in the water sink cyclically flows in the wet curtain plates via the axial fan and the air cooler water pump, ammonia gas is repeatedly absorbed, concentration of the ammonia gas in the breeding house is effectively reduced, growth speed and feed conservation ratio of livestock are increased, disease rate of the livestock is decreased, cost of enterprises is saved, and environmental pollution caused by discharge of the ammonia gas is avoided.
Owner:HENAN UNIV OF ANIMAL HUSBANDRY & ECONOMY
Fibre detaching apparatus with high shearing
InactiveCN100347374CImprove surface smoothnessReduce contentPaper recyclingPulp beating/refining methodsFiberFiltration
A high-shear fiber breaker for separating fiber beam and fiber fragment from paper stuff is provided. It contains shelf, dynamic units and multilevel operate units. Each unit contains helical delivery area in beck body and major work area. Helical delivery area contains constant screw stem on screw shaft. One end of constant screw stem connects with major work area. Beck body wall related to another end has a feed head. Major work area contains a series of vary screw stem on the square screw shaft. Vary screw stem arranges forward and reverse independent. Path with unloading valve for connecting with the next grade operating units is set on beck body in center of axial direction of major work area. A raw of filtration pore with filtrate receiver is set under the beck body wall in axial direction of vary screw stem.
Owner:TIANJIN UNIV OF SCI & TECH
Direct-current (DC) side voltage balance control method for chain type static synchronous compensator
InactiveCN102931666BReduce the riseFlexible AC transmissionReactive power adjustment/elimination/compensationDistribution controlControl power
Owner:XI AN JIAOTONG UNIV
Composite material, electroluminescent diode and display device
PendingCN114039001AImprove external quantum efficiencyImprove life performanceSolid-state devicesSemiconductor/solid-state device manufacturingQuantum efficiencyDisplay device
The invention discloses a composite material, an electroluminescent diode and a display device. The composite material comprises an electron transport material and an electron trap material which are mixed, the electron transport material is an n-type metal oxide, and the absolute value of the LUMO energy level of the electron trap material is 5-8 eV. Experiments prove that the n-type metal oxide material is doped with the electron trap material with the deep LUMO energy level to serve as the electron transport layer, the luminance rise range of the electroluminescent diode at the initial stage of light emitting is reduced or the luminance is slowly reduced at the initial stage of light emitting, and the luminance is not remarkably increased. In addition, the electroluminescent diode with the electron transport layer also has higher external quantum efficiency and more excellent service life performance.
Owner:GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
Starting method of three-phase induction motor and settling centrifugal separation device
InactiveCN107645252BReduce the riseCentrifugesPolyphase induction motor starterElectricityWave shape
PROBLEM TO BE SOLVED: To reduce temperature rise of three-phase induction motor during decanter start compared with base start method.SOLUTION: A start method of three-phase induction motor for accelerating rotation of the bowl of a decanter type centrifugal separator from stop state toward a target speed, starts the three-phase induction motor while cutting off the waveform of a voltage supplied from a power supply to the three-phase induction motor by means of a thyristor, in a state where the power supply and three-phase induction motor are electrically connected in star, and when the effective value of the current of the three-phase induction motor descends during start, conduction angle of the thyristor is increased.SELECTED DRAWING: Figure 4
Owner:TOMOE ENGINEERING CO LTD
Display panel and display device
PendingCN114883373AGood cooling performancePrevent temperature riseSolid-state devicesCooling/ventilation/heating modificationsPhysicsTransmittance
The invention discloses a display panel and a display device.The display panel is provided with a first display area and a second display area at least partially surrounding the first display area, the light transmittance of the first display area is larger than that of the second display area, and the display panel comprises a substrate; the array layer is arranged on one side of the substrate, and the array layer comprises a plurality of pixel circuits; the heat dissipation layer is arranged on the side, away from the substrate, of the array layer, the heat dissipation layer comprises a heat dissipation block at least partially arranged in the first display area, and the orthographic projection of the heat dissipation block on the substrate at least covers the orthographic projection of the corresponding pixel circuit on the substrate. Due to the fact that the heat dissipation area of the heat dissipation block is larger, the corresponding heat dissipation performance of the heat dissipation block is better, the situation that the temperature of the heat dissipation block rises due to infrared light irradiation and materials of the display panel are damaged is avoided, the service life of the display panel is prolonged, and the display effect of the display panel is guaranteed.
Owner:YUNGU GUAN TECH CO LTD
Wine rack for refrigeration equipment and refrigerator provided with same
InactiveCN104374155ASimple structureEasy to operateLighting and heating apparatusSupportEngineeringRefrigeration
The invention discloses a wine rack for refrigeration equipment and a refrigerator provided with the wine rack. The wine rack for the refrigeration equipment comprises a wine rack body. At least a part of the wine rack body is of a hollow structure. The wine rack is further provided with a filling port communicated with the hollow structure. The hollow structure is filled with liquid with high specific heat capacity. By the adoption of the wine rack, the temperature fluctuation of red wine is reduced, and then the storage time of the wine is prolonged; the wine rack is convenient to operate, low in cost and simple in structure.
Owner:HEFEI HUALING CO LTD
A DC fault self-clearing circuit for two-level voltage source converter
ActiveCN107086764BSelf-clearing implementationSimple structurePower conversion systemsCurrent limitingEngineering
The invention overcomes the technical defect that the existing two-level voltage source converter does not have the self-clearing capability of DC faults, and provides a DC fault self-clearing circuit for the two-level voltage source converter. The invention includes a zero-crossing shutdown circuit, a current limiting circuit, a first resonance generating circuit and a second resonance generating circuit. The invention has a simple structure and can realize the self-clearing of the DC fault without tripping the circuit breaker on the AC side. At the same time, since the response time of the circuit components is shorter than that of the AC circuit breaker, the rising range of the fault current is reduced, and the current stress of each component of the two-level voltage source converter is effectively reduced.
Owner:POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD
A protection device and protection method for DC distribution network
ActiveCN109921396BImprove reliabilityReduce the riseEmergency protective circuit arrangementsCurrent limitingCurrent distribution
Owner:JIANGSU ELECTRIC POWER CO +2
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