734results about How to "Uniform temperature distribution" patented technology

The invention relates to the technical field of server heat dissipation optimization, in particular to an intelligent heat dissipation control optimization method and system for a server, and the method comprises the steps: obtaining the temperature information of each region of the server and the working load data of the server; based on the temperature information, constructing multi-dimensional thermal field topological mapping; executing group theory base heat flow dynamic analysis according to the multi-dimensional thermal field topological mapping; performing spectral decomposition heat dissipation efficiency evaluation based on a group theory basis heat flow dynamic analysis result; according to the spectral decomposition heat dissipation efficiency evaluation result and the workload data, nonlinear heat transfer optimization is executed; a self-adaptive feedback control strategy is generated and used for adjusting a heat dissipation system of the server, accurate description of internal temperature distribution of the server is provided by a multi-dimensional thermal field topology mapping technology, and a foundation is laid for subsequent optimization; the group theory-based heat flow dynamic analysis method deeply reveals the essential law of heat transfer; the spectrum decomposition heat dissipation efficiency evaluation provides a brand new performance quantitative index, and the heat dissipation efficiency of the system is improved by more than 20%.

The invention discloses a waste plastic pyrolysis-catalysis system based on electromagnetic induction heating and a catalytic reforming method, and relates to the technical field of plastic pyrolysis. The problems that in the existing plastic pyrolysis-catalysis process, the yield and quality of CNTs and H2 are affected by factors such as non-uniform heating, catalyst deactivation and difficult product separation exist are solved. The system comprises a gas inlet device, a waste plastic pyrolysis device, a waste plastic continuous feeding device, a waste plastic catalytic reforming device and a gas collecting device, the gas inlet device is used for providing argon gas flow for the waste plastic pyrolysis device through a gas pipe; the waste plastic continuous feeding device is used for feeding waste plastic into the waste plastic pyrolysis device for heating and cracking; pyrolysis products enter a waste plastic catalytic reforming device after passing through a waste plastic pyrolysis device; according to the waste plastic catalytic reforming device, the temperature is regulated and controlled through the electromagnetic induction heating module, and the catalytic reforming process is optimized; and gas products after catalytic reforming are collected by a gas collecting device. The method is applied to the field of plastic recovery.

The invention discloses a high-power offshore semi-direct-drive permanent magnet wind driven generator cooling system which comprises an outer stator and an inner rotor, the outer stator comprises a motor base, a stator iron core and a stator winding assembled on the stator iron core are installed in the motor base, and an air-water cooler is installed on the upper portion of the motor base. A flow guide plate is arranged in the air-water cooler, a heat dissipation core body is installed at the position, located at the bottom of the flow guide plate, in the air-water cooler, and the flow guide plate is used for enabling hot air exhausted out of the motor to pass through the heat dissipation core body to form a plurality of parallel air paths in the air-water cooler. And the plurality of air paths connected in parallel respectively perform cold and heat exchange with the interior of the motor so as to reduce the air resistance in the motor and the air-water cooler. The cooling system has the characteristic of low wind resistance, the power of the air cooling driving motor used by the cooling system can be reduced, the cost of the cooling system is reduced, and the heat dissipation efficiency is improved.

The invention provides an automobile control device foaming optimization control method based on multivariate temperature coupling analysis, and relates to the technical field of manufacturing process control, and the method comprises the following steps: based on supporting frame attribute characteristics and a material component ratio, according to a preset foaming processing stage and a foaming evaluation function, in a simulation foaming space, according to a foaming evaluation function; performing simulation optimization on the first temperature control parameter, the second temperature control parameter, the third temperature control parameter and the fourth temperature control parameter to generate an optimal temperature control strategy; and according to the preset foaming processing stage and the optimal temperature control strategy, executing foaming control of the target steering wheel. The technical problems that a traditional foaming technology pays more attention to control of single temperature, multiple influences of different temperature changes on foaming reaction cannot be effectively considered, foaming is not uniform, and the foam structure is not stable can be solved; by accurately controlling the four temperature control parameters, the mutual influence and coupling relationship among the temperatures can be fully considered, and uniform temperature distribution and stable foam structure in the foaming process are ensured.

The invention relates to a permanent magnet synchronous motor design method based on a multi-objective optimization algorithm, and the method achieves the efficient design and optimization of a permanent magnet synchronous motor through the combination of finite element simulation, multi-physical field coupling analysis, neural network performance prediction, and a hybrid optimization algorithm of a genetic algorithm and particle swarm optimization. The method comprises the following steps: determining a plurality of design targets according to an application scene of a motor, selecting key design variables, performing data cleaning and normalization processing, performing electromagnetic field, thermal field and mechanical field simulation by using a multi-physics field coupled finite element model, predicting the performance of the motor by combining LSTM and Transform neural network models, expanding a training data set through a data enhancement technology, and performing data enhancement on the motor. Finally, a hybrid optimization algorithm combining a genetic algorithm and particle swarm optimization is adopted to carry out global optimization and adaptive adjustment of design parameters, and a Pareto optimal leading edge is utilized to find out an equilibrium solution between design targets, so that the accuracy and efficiency of motor design are improved, and the method is suitable for various motor design scenes.

The invention discloses a performance detection device for an automobile brake pad in the technical field of automobile brake pad detection. Comprising a controller, a tire, a detection body and two brake pads, a detection groove is formed in the top of the detection body, a water inlet pipe and a water outlet pipe are arranged on the surfaces of the two sides of the detection body respectively, and a first electromagnetic valve and a second electromagnetic valve are arranged on the water inlet pipe and the water outlet pipe respectively and electrically connected with the controller; a rotating assembly and a brake assembly are installed in the detection groove, an air blowing assembly is installed on the inner wall of the detection groove, and a signal assembly is installed at the bottom of the detection groove. The rotating assembly, the brake assembly, the air blowing assembly and the signal assembly are electrically connected with the controller. The device is simple and easy to operate, through cooperative work of the detection body, the water inlet pipe, the water outlet pipe, the rotating assembly and the brake assembly, performance indexes of the brake pad can be detected under the conditions of simulating road surface ponding, muddy road sections and the like, and therefore detection data are more reliable and scientific.

The utility model discloses an energy-saving differential pressure ripening warehouse for fruits. The energy-saving differential pressure ripening warehouse comprises a differential pressure circulating system, a refrigeration compression system and a ventilation system, the differential pressure circulation system comprises an air duct cavity, a vertical air guide duct and an axial flow fan, the air guide duct is communicated with the air duct cavity, an air outlet of the axial flow fan faces upwards and is located in the air duct cavity, the air outlet of the axial flow fan is correspondingly provided with a heat exchanger, and the refrigeration compression system can convey different heat exchange media to the heat exchanger according to the temperature adjusting requirement. By means of the differential pressure circulation system, air circulation in the warehouse body can be uniform and regular, gas circulation components, ethylene and temperature distribution of the ethylene are more uniform, the situation that the maturity of fruits is not uniform due to the fact that the temperature or the ethylene concentration is not uniform can be avoided, and the device is suitable for large-scale ripening of the fruits; and the medium introduced into the heat exchange coil pipe is switched according to requirements through the compression refrigeration system, and more energy conservation and consumption reduction are achieved especially for the temperature rise of the warehouse.

The invention discloses a preparation process of a high-thermal-conductivity composite substrate, and the process comprises the steps: fixing a pre-prepared skeleton on an insulating base layer, and enabling branches of the skeleton and the surface of the insulating base layer to jointly define a plurality of heat dissipation spaces; dividing the plurality of heat dissipation spaces into at least one high heat dissipation space and at least one low heat dissipation space according to the layout and heating characteristics of a predetermined electronic component; a first heat-conducting filler is injected into the high-heat-dissipation space, a second heat-conducting filler is injected into the low-heat-dissipation space, curing treatment is conducted, the heat conductivity coefficient of the first heat-conducting filler is larger than that of the second heat-conducting filler, and the first heat-conducting filler and the second heat-conducting filler are combined with the framework to form a heat-conducting layer; a functional layer of the printed circuit board is fixed on the surface of the heat conduction layer, the area, corresponding to the high-heat-dissipation space, of the functional layer is used for installing high-heat-dissipation electronic elements, and the area, corresponding to the low-heat-dissipation space, of the functional layer is used for installing low-heat-dissipation electronic elements According to the technical scheme, different heat conduction measures can be adopted for different heating elements.

The invention relates to the technical field of hydrogen production, in particular to a capacitor electrode and a decoupling water electrolysis hydrogen production square electrolytic bath, and by means of the design of gas and liquid flow channels of the capacitor electrode and the decoupling water electrolysis hydrogen production square electrolytic bath, hydrogen and oxygen can be isolated in water electrolysis reaction; the high cost of the ion exchange membrane is saved, and the limitation of the diaphragm is broken through, so that the working pressure of the electrolytic cell can reach 5MPa or even higher; by arranging the electrolytic cell limiting mechanism, the small electrolysis chambers can be prevented from falling, so that leakage of electrolyte is prevented, and meanwhile, due to the modular skid-mounted design, distributed moving and mounting are facilitated, and overhauling and maintenance during faults are facilitated; by means of the unique design of the square flow field, the square alkali liquor inlet and outlet and the square hydrogen / oxygen outlet, it can be ensured that the flow speed of an electrolyte flow channel is uniform, gas is exhausted in time, energy loss is reduced, and the electrolysis efficiency is improved.

The invention discloses a nondestructive detection method for road and bridge concrete defects, and belongs to the technical field of infrared detection. According to the road and bridge concrete defect nondestructive testing method, a work box is included, a detection box is further included, the detection box is arranged in the work box in a lifting mode, a mounting box is fixedly connected into the detection box, a connecting plate is slidably connected to the mounting box, a swing air injection mechanism is arranged on the connecting plate, and a heating mechanism is arranged in a preheating box; the preheating box is communicated with the swing injection mechanism through a connecting pipe, and the detection head is matched with the swing injection mechanism; on one hand, a detector can be used for infrared detection of bubbles or cracks on the surface of concrete, and on the other hand, detection plasticine in the template box can be pressed onto the surface of the concrete, so that the plasticine can be pressed into the bubbles or the cracks when making contact with the cracks or the bubbles on the surface of the concrete; protrusions identical to the bubbles and the cracks are pressed out, so that the depths of the bubbles and the cracks can be observed conveniently, and the precision of follow-up visual detection is improved.

The invention relates to a wafer carrier for providing uniform temperature distribution, mainly comprising a support assembly and a diffusion unit, in which the support assembly comprises at least one groove and an air inlet pipeline. The diffusion unit is made of a porous material and is arranged on the top surface of the supporting assembly. The diffusion unit comprises a body, a plurality of protruding parts and at least one diffusion channel, wherein the protruding parts and the diffusion channel are arranged on a bearing face of the body. The protruding part of the diffusion unit is used for bearing a wafer, and the gas inlet pipeline of the supporting assembly conveys gas to the groove and conveys the gas to the diffusion unit through the groove. Therefore, the gas is transmitted to the bearing surface and the protruding part through the pores of the diffusion unit and is in contact with the bottom of the wafer on the diffusion unit, so that the temperature of the wafer is adjusted, and the uniformity of the temperature distribution of the wafer is improved.

The invention discloses a welding tool, a heater module and an integrated module electric compressor, and belongs to the technical field of heater welding machines.The welding tool comprises a tool body, a containing cavity is formed in the tool body, a heater is placed in the containing cavity, and the heater comprises a base plate and a heating plate; the heating plate is connected with a plurality of heat conducting fins; the tool body comprises an upper positioning assembly and a lower positioning assembly, the upper positioning assembly and the lower positioning assembly are mutually fixed through bolts, the lower surface of the upper positioning assembly, the upper surface of the lower positioning assembly and cavities in the opposite surfaces of the upper positioning assembly and the lower positioning assembly are combined to form a containing cavity, and a plurality of welding exhaust holes are formed in the containing cavity. A stress release groove is connected into the containing cavity. The substrate surface temperature can be reasonably and effectively utilized, waste of waste heat in the substrate welding process is reduced, the heat efficiency in the substrate welding process is improved, and the welding quality of the substrate and a heating plate is effectively improved.

The invention discloses a zirconium-nickel dissimilar metal welding method based on active regulation and control of a temperature field. The zirconium-nickel dissimilar metal welding method comprises the following steps that S1, base metal is cleaned; the butt-joint end faces and the welding surfaces of the zirconium and nickel alloy pipes are polished and cleaned, and clean zirconium and nickel base materials are obtained; s2, a to-be-welded part is assembled; the to-be-welded end face of the clean base metal is assembled in a protective gas cavity of the rotary clamping device; s3, welding is conducted; a laser scanner is adopted for welding at a preset welding position, heat source gradient distribution of base metal at the two ends of a welding seam is controlled by regulating and controlling laser power, welding seam temperature field feedback is established through an infrared temperature sensor, and real-time monitoring and laser power regulating and controlling are conducted; s4, postweld heat treatment; and the laser power is adjusted in real time according to welding seam temperature field feedback so as to adjust and control the welding seam cooling process. According to the method, effective connection of zirconium-nickel indissolvable metal is achieved by controlling the regional welding temperature field, the temperature range for forming brittle compounds is avoided, the uniformity of a molten pool between Zr and Ni materials is ensured, and welding defects such as hot cracks and air holes are reduced.

The invention relates to a synthetic quartz bar deposition device and method.The device comprises a reaction cavity used for deposition and a rotary lifting suspender stretching into an inner cavity of the reaction cavity, the upper end of the rotary lifting suspender is connected with a vertical lifting mechanism and a rotary chuck, and the lower end of the rotary lifting suspender is connected with a glass target bar; the device is characterized in that the blow lamp assembly comprises a horizontal moving support, an inclined telescopic rod is arranged at the upper end of the horizontal moving support, and the front end of the inclined telescopic rod is connected with a blow lamp capable of swinging up and down. According to the method, the spraying range can be expanded, the deposition uniformity can be improved, the temperature distribution of a deposition area can be more uniform, the axial uniformity and the radial uniformity of a deposited bar can be improved at the same time, and therefore the deposition stability and the quality of the deposited bar are improved.

The invention discloses an annealing device and method for an ultra-low-loss optical fiber, and the device comprises an optical rod heating system, an optical fiber annealing system, a screw-in air inlet system, a fish-mouth stacked ceramic tube system, a coating system, and a take-up system. The optical wand heating system, the optical fiber annealing system, the screw-in type air inlet system, the coating system and the take-up system are sequentially arranged in the optical fiber entering direction, and the fish mouth stacked ceramic tube system is arranged in the optical fiber annealing system. According to the invention, through the design of the fish mouth stacked ceramic tube, the airflow path of the annealing area is optimized, so that airflow can be uniformly distributed in multiple directions, more uniform temperature distribution is realized, and the mechanical and optical performance of the optical fiber is improved; by means of a screw-in gas inlet mode, entered gas flow forms rotary motion, the gas mixing effect and flow speed control are enhanced, the gas flow stability in the annealing process is ensured, unnecessary fluctuation is reduced, and the optical fiber quality is improved. And the flexibility and adaptability of annealing equipment are improved, and different production requirements are met.

The invention discloses a purification method and a purification device for crystallized magnesium, and relates to the field of magnesium metal smelting. The method comprises the following steps: under the protection of an inert atmosphere, firstly carrying out pressure-applying melting treatment on a magnesium material to be smelted, and then carrying out pressure-applying filtering treatment on a product obtained after the melting treatment, so as to complete the flux-free smelting process of the magnesium material. And meanwhile, the metal magnesium liquid and most of the oxide shells are separated by utilizing the liquidity difference between the liquid metal magnesium and the solid oxide shells. Compared with a conventional smelting process without pressure application, the method has the advantages that the melting rate of the crystallized magnesium can be remarkably increased, most of oxide impurities are removed, a series of pollution problems caused by flux use are solved from the source, and low-cost, high-efficiency and high-quality smelting of the crystallized magnesium is realized.

The invention discloses a car bottom type carbon roasting furnace, which belongs to the technical field of heat treatment furnaces, and comprises a furnace car and a fixed furnace body arranged above the furnace car, the top of the fixed furnace body is provided with a circulating fan, the left side of the circulating fan is provided with a spraying device, and the two sides of the circulating fan are provided with a plurality of combustion nozzles side by side. A smoke exhaust pipeline for exhausting smoke is arranged at the tail part of the fixed furnace body; a heat preservation and insulation module is further arranged in the fixed furnace body. A furnace door and a water-cooling door frame are arranged on the front portion of the fixed furnace body. According to the invention, a smoke combustion mode of saggar-exhaust pipe-storage tank-combustor is completely abandoned, and a mode of discharging smoke volatile matter to the incinerator for direct combustion is adopted, so that the comprehensive energy consumption is below 3.6 * 10 < 6 > kJ, and the energy consumption level of a domestic ring type roasting furnace is completely reached. Meanwhile, the gas leakage amount is extremely small, the temperature distribution in the furnace is uniform, the product homogeneity is good, and operation automation, temperature control precision, fuel utilization maximization and finished product high normalization are achieved.

The invention discloses carbon monoxide gas oxidative dehydrogenation equipment, which belongs to the field of carbon monoxide treatment and comprises a hollow shell, a gas inlet cover fixedly connected to the upper end of the hollow shell, a bottom plate fixedly connected to the inner wall of the hollow shell and a first exhaust port formed in the lower end of the bottom plate. A first partition plate and a second partition plate located below the first partition plate are further fixedly connected to the inner wall of the hollow shell, and a flow passing cavity is formed between the upper portion of the first partition plate and the air inlet cover. The cooling air ring can exhaust oxygen to the inner wall of the reaction through hole, it is ensured that the oxygen is evenly distributed on the inner wall of the reaction through hole, the oxygen is prevented from being concentrated in a certain area, and therefore the catalytic reaction efficiency is improved; it is ensured that the catalytic reaction is evenly conducted in the whole catalyst, the situation that the reaction efficiency is reduced due to insufficient oxygen or unsmooth airflow in a local area is avoided, and it is ensured that reactants can be fully converted.

According to the epoxypropane production system and method with the high conversion rate and the high yield, the interior of the reactor is divided into the upper section and the lower section through the production system, the accurate feeding proportion of three materials is provided, and the mode of segmented control and distributed feeding is provided; propylene and most of hydrogen peroxide diluted by a solvent are added into a first reaction section at the bottom through a first-stage feeding distributor for reaction, and then a reaction mixed solution of the residual solvent and hydrogen peroxide is supplemented into a second reaction section through a second-stage feeding distributor, so that reaction materials are uniformly mixed for reaction; the problem that the temperature is too high and hydrogen peroxide is decomposed due to uneven mixing caused by one-time adding or non-distributed adding of materials is avoided, the conversion rate of the materials is increased, meanwhile, fins are arranged on the outer sides of the catalytic tubes, the heat exchange area is increased, reaction heat is discharged in time, hydrogen peroxide decomposition is avoided, and the catalytic effect is improved. The selectivity and the yield of the product epoxypropane are further improved.

The invention discloses a heating method for postweld heat treatment of a thick-wall horizontal pipe section, an induction heat treatment system is adopted, the induction heat treatment system comprises an induction cable, induction heating equipment, thermocouples, a heat preservation blanket and a heat insulation batten, a plurality of thermocouples are uniformly spot-welded on a weld joint in the circumferential direction, one thermocouple is spot-welded on the top of the weld joint and is arranged as a temperature control thermocouple, and the other thermocouple is arranged as a temperature control thermocouple. The heat preservation blanket is wound on the heat treatment pipe section, the heat insulation batten is arranged on the top of the heat preservation blanket, the induction cable is wound on the outer side of the heat preservation blanket and the outer side of the heat insulation batten, the induction heating device is connected with the induction cable, and heat treatment process parameters are controlled according to signals of the temperature control galvanic couple. The temperature is kept constant for 4-6 minutes every time the temperature is increased by one gradient. The circumferential temperature difference of the pipeline can be reduced, the temperatures of the inner wall and the outer wall can be rapidly consistent, and the heat treatment efficiency is improved.

The invention relates to the technical field of ceramic production, in particular to an automatic powder burying device for special ceramic production, which comprises a stamping table, an automatic feeding device and a powder burying table, the powder burying table is arranged on the stamping table, the automatic powder burying device further comprises a plurality of vertical knocking blocks, and the vertical knocking blocks are positioned on the powder burying table; the horizontal knocking blocks are located on the powder burying table, the multiple horizontal knocking blocks are divided into two groups and located on the two sides of the powder burying table respectively, and when the automatic powder burying device for special ceramic production is used, different from the prior art, gaps between powder particles are effectively compressed through knocking, and therefore the powder particles are prevented from being damaged; compared with the prior art, the powder burying table has the advantages that the compactness of the powder is improved, the higher compactness is favorable for reducing pores and defects in the product and improving the mechanical strength of the product, and meanwhile, the knocking effect can promote powder particles to be redistributed in the powder burying table, so that the local gap or accumulation phenomenon is avoided, and the uniform powder distribution is favorable for obtaining more consistent product quality.

The present invention provides a particle collision disturbance type gas lift loop reactor, the reactor comprising: a reactor body; a draft tube with a sieve plate; particles, which can be suspended inside the draft tube when the reactor is running; a gas distributor; a main liquid distributor; a gas inlet; a liquid inlet; a gas outlet; and a liquid outlet. Compared with the traditional gas lift loop reactor, due to the turbulent disturbance of particles and fluid inside the draft tube of the reactor, it helps to prevent gas phase aggregation and increase liquid phase back mixing, so that the gas and liquid phases in the reactor are fully mixed, the solubility of the gas phase in the liquid phase and the gas-liquid contact area are increased, the mass transfer rate and heat transfer rate between fluids are improved, and at the same time, the temperature distribution in the reactor is uniform, which is conducive to gas-liquid two-phase reaction or gas-liquid-solid three-phase reaction, and can be widely used in gas-liquid two-phase or gas-liquid-solid three-phase chemical reaction processes.

The invention provides a preparation method of porous carbon for a silicon-carbon negative electrode material, and belongs to the field of lithium ion battery negative electrode materials. The preparation method of the porous carbon for the silicon-carbon negative electrode material comprises the following steps: crushing and grading, activating and pore-forming, washing and purifying, and carbonizing at high temperature. According to the preparation method of the porous carbon for the silicon-carbon negative electrode material, the technical problems that the yield of the porous carbon for the current silicon-carbon negative electrode material is difficult to increase, the activation process is difficult to control, the activation efficiency is low, the activation effect is poor and the metal pollution prevention and control cost is high are solved, and meanwhile, the uniformity of the pore structure of the porous carbon for the silicon-carbon negative electrode material is further improved; the quality of porous carbon is improved; the production efficiency is improved; and the production cost is reduced.

The invention relates to the technical field of compost fermentation, in particular to an efficient energy-saving livestock manure compost fermentation device and a fermentation method.The efficient energy-saving livestock manure compost fermentation device comprises a bottom plate, a fermentation tank is fixedly arranged on the bottom plate, a servo motor is fixedly arranged at the bottom end of the fermentation tank, and a stirring device used for stirring manure is rotationally arranged in the fermentation tank; when using the device, a worker moves the device to a proper position and then fixes the device, to-be-fermented excrement is poured into a fermentation tank of the device, after excrement filling is completed, the worker closes a feeding port and starts a servo motor on a bottom plate of the device, and through a guide groove formed in the outer wall of a cylinder, the purpose that in the rotating process of the cylinder, the excrement is fed into the fermentation tank is achieved. The stirring shaft can be driven to move up and down through the guide groove, materials in the fermentation tank can be turned over, raw materials on the lower layer are turned over and stirred to the upper layer, then the raw materials on the bottom layer make contact with oxygen, and it is guaranteed that the temperatures of the upper layer and the lower layer are evenly distributed.

The utility model relates to the technical field of optical fiber temperature measurement, in particular to a distributed temperature measurement temperature calibration device which comprises a heat preservation shell, a heating cavity is arranged in the heat preservation shell, a cylindrical heating core column is arranged in the heating cavity, a heating piece is arranged at one end of the heating core column, and a first temperature sensor is further fixedly installed on the heating core column. Two sections of calibration optical fibers are wound on the peripheral surface of the heating core column, the two ends of the temperature measuring optical fiber are connected with the two sections of calibration optical fibers respectively, one end, away from the temperature measuring optical fiber, of one section of calibration optical fiber is connected with a reference optical fiber, and a heat preservation layer used for wrapping the heating core column is arranged in the heating cavity; a heating sheet is placed at the top of an aluminum alloy heating core column, a calibration optical fiber is tightly wound on the outer wall of the heating core column, and gaps between the heating core column and the heating sheet and between the heating core column and the calibration optical fiber are filled with heat-conducting silicone grease, so that the calibration optical fiber is uniformly heated.

The invention relates to the technical field of heat storage performance detection, in particular to a phase change energy storage component heat storage performance detection box which is used for solving the problem that an existing device is poor in heating effect on the lower portion of a to-be-detected object. The heat exchange box comprises a heat preservation mechanism and a heating mechanism used for heating the heat preservation mechanism, and a disturbance mechanism and a pressurization mechanism are connected into the heat preservation mechanism. The disturbance mechanism comprises a placement table and a lifting table vertically penetrating through the middle of the placement table in a sliding mode, and a to-be-detected object is placed on the placement table; the pressurizing mechanism comprises a piston component, and when the placing table vertically slides on the lifting table, the piston component introduces external air into the heat preservation mechanism; according to the design of the heat exchange box, the disturbance mechanism and the pressurization mechanism are introduced, so that the problems of a traditional detection device in the aspects of temperature uniformity and heat conduction efficiency are effectively solved.

The invention belongs to the technical field of reverse water gas shift, and discloses a method for catalyzing reverse water gas shift by magnetic induction, which comprises the following steps: tabletting and molding a magnetic catalyst and white carbon black to obtain a catalyst; a catalyst is placed in an induction coil area of induction heating equipment, mixed gas of CO2 and H2 is introduced, a reverse water-gas shift reaction is carried out, the reaction pressure is normal pressure, the alternating frequency is 50-300 KHz, and CO is produced. According to the invention, the charge-spin concerted catalysis reverse water-gas shift process of the catalyst is realized through the action of the magnetic field. The reverse water-gas shift reaction is a strong heat absorption process and needs a high reaction temperature, and the reverse water-gas shift catalyst used in the magnetic induction system has a heating effect and a catalytic effect at the same time and can achieve excellent performance at a low temperature. And the problems of high energy consumption, low energy utilization rate and non-uniform heating of the traditional catalytic reaction are avoided.

The invention provides a multi-nozzle micro-mixing annular combustion chamber suitable for high-hydrogen-content fuel. The multi-nozzle micro-mixing annular combustion chamber is wrapped by a cartridge receiver, and a combustion area is defined by a combustion chamber head, an outer barrel and an inner barrel. A micro-mixing nozzle and a head cooling hole are arranged at the head of the combustion chamber; and an air film cooling hole and a mixing hole are formed in the outer barrel and the inner barrel of the combustion chamber. Air enters a combustion area through the micro-mixing nozzle, the head cooling hole, the air film cooling hole and the mixing hole, fuel is jointly supplied through a main fuel channel and an auxiliary fuel channel of the micro-mixing nozzle, and therefore the proportion of diffusion combustion and premixed combustion can be controlled. By the adoption of the multiple micro-mixing nozzles and the multiple micro-mixing units, fuel and air are highly graded and enter a combustion area in a high-speed jet flow mode to be partially premixed and combusted, the size of a backflow area in the combustion chamber is limited through cooling gas and mixed gas, and therefore the retention time of combustion products is shortened.

The embodiment of the invention provides vapor deposition equipment, which comprises a deposition chamber, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe and a gas outlet pipe, the at least one bearing platform is arranged in the deposition chamber and is suitable for bearing a wafer; the spraying device is arranged in the deposition chamber, is opposite to the bearing platform, is communicated with the opening and is suitable for spraying reaction gas to the surface of the wafer so as to form a deposition film on the surface of the wafer; the heating device is arranged below the corresponding bearing platform and is suitable for providing heat for the corresponding wafer; the heating device comprises a plurality of heating elements, the heating elements are connected with different power sources, and voltage values and reaction gas parameters of the power sources connected with the heating elements, resistance values of the corresponding heating elements, physical parameters of the deposited thin film, the distance between the deposited thin film and the center position of the corresponding bearing platform, the initial temperature and the deposition time are related. By adopting the equipment, the uniformity of the thickness of the film deposited on the surface of the wafer can be improved.

The invention relates to the field of silicon carbide single crystal growth, in particular to a silicon carbide single crystal growth method and a crucible. The crucible comprises a pot body, an inner heater and an outer heater, the pot body is of a circular ring shape with an opening in the top and is made of graphite, the pot body comprises an inner ring wall and an outer ring wall which are coaxially arranged and connected with each other, the inner heater is connected to the outer wall of the inner ring wall of the pot body, and the outer heater is connected to the outer wall of the outer ring wall of the pot body. According to the method, a low-temperature area with lower temperature is formed at the liquid level of the crystal growth melt, and a crucible is rotated to form carrying liquid flow flowing along the circumferential direction, so that off-axis seed crystals are in contact with the low-temperature area of the crystal growth melt, and the seed crystals are far away from the circle center of the carrying liquid flow. The step direction of the off-axis seed crystal is opposite to the liquid flow carrying direction, so that the surface of the seed crystal grows in an anti-parallel flow growth mode, and the problem that the surface of a single crystal is partitioned due to the fact that partial area of the surface of the single crystal grows in a parallel flow growth mode is solved, so that the quality of the single crystal is improved, and defects are reduced.