37results about How to "Reduce the rise" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The embodiment of the invention discloses a display panel, a driving method thereof and a display device.The display panel comprises N types of display areas, the N types of display areas comprise the ith type of display area and the jth type of display area, the display panel comprises M display parts, the M display parts comprise the first display part and the second display part, the first display part comprises at least one ith type of display area, and the second display part comprises at least one jth type of display area. The first display part comprises at least one ith display area, the second display part comprises at least one ith display area, at least one jth display area is arranged between the ith display area included in the first display part and the ith display area included in the second display part, and the luminous time periods of the ith display area and the jth display area are at least partially not overlapped so as to reduce the same time period. The number of the sub-pixels driven by the power supply voltage line in the display panel is reduced, so that when the sub-pixels emitting light in the same time period emit light with the same brightness, the rising amplitude of instantaneous current on the power supply voltage line is reduced, the voltage drop on the power supply voltage line is reduced, and the uniformity of a display picture is improved.

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.

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.

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.