139results about How to "Stable temperature field" patented technology

The invention discloses a variable frequency air conditioner low-frequency operating control method. The variable frequency air conditioner low-frequency operating control method comprises the steps that a first frequency value, a second frequency value,..., the Nth frequency value are set between a smallest frequency value and a largest frequency value in low-frequency operating from small to large, N is larger than or equal to two, and the Nth frequency value is larger than the smallest frequency value and is smaller than or equal to the largest frequency value; when a compressor operates below the largest frequency value in low-frequency operating, the compressor operates for more than 2 min under the first frequency value, the second frequency value,..., the Nth frequency and the largest frequency value respectively; the frequency of the compressor in the low-frequency operating period is acquired, and when the compressor operates for 30 min to 35 min continuously with the operating frequency of the compressor below the largest frequency value in low-frequency operating, the compressor operates for 2 min to 3 min for oil return with the frequency rising to the oil return frequency, and then the compressor operates with the frequency reduced to the frequency value before frequency rising. An air conditioner can effectively operate under the low frequency for a long time, the air conditioner can operate in an energy-saving mode, meanwhile, rotating speed control over corresponding inner and outer fans is matched, an air conditioning system can operate stably and safely, and meanwhile a stable temperature field is provided for the interior of a room.

The invention relates to a preparation method of a low heat expansion carbon fiber reinforced resin matrix composite material mold, belonging to the technical field of composite material preparation. The method is capable of forming a molding surface with a VARI (Vacuum Assisted Resin Infusion) technique, and ensuring low heat expansion performance of the mold by controlling the carbon fiber laying direction, precuring temperature, postcuring manner and postprocessing manner of the molding surface. With the adoption of the VARI technique, when a vacuum pressure reaches to 0.1MPa, carbon fiber cloth is compressed by vacuum, so that the product is internally dense after resin is guided in the product, and the volume content of composite material fibers is ensured; and meanwhile, bubbles between carbon fiber cloth layers are removed so as to ensure that the content of internal pores of the composite material is as few as possible and ensure the strength of the composite material.

The invention discloses a rapid detection pVTt methodgas flow standard device and a detection method. The device comprises a standard container, a controller, a heating device, a refrigeration device, an electric fan, and a vacuum pump. The standard container is internally provided with a horizontal air channel from the front end to the rear end. A detected sonic nozzle is connected with the front end of the horizontal air channel through a flow sensor. The rear end of the horizontal air channel is provided with the electric fan. The standard container is connected with the vacuum pump, the heating device, and the refrigeration device. The upper ends of the heating device and the refrigeration device extend into the horizontal air channel. A flow sensor, the heating device, the refrigeration device, the electric fan, and the vacuum pump are connected with the controller. The method comprises: adjusting temperature to keep constant temperature, measuring parameters of the balance states of the standard container before air intake and after air intake, calculating to obtain detected mass flow rate, comparing the detected mass flow rate with theoretical mass flow rate, to obtain a detection result of whether qualified. The device is simple in structure, low in price, high in measuring precision, high in measuring efficiency, and repeatability is better than 0.06%.

The inventio relates to a process of hihg- temperature ionic liquid catalytic biomass through fast thermal cracking and used device. It comprises following steps: feeding biomass particles to impinger through screw feeder, feeding high- temperature ionic liquid into impinger by using high- temperature fused salt pump, the biomass particles is cracked fast under high- temperature ionic liquid action; feeding the cracking gas into cyclone filter and condensing it into biological oil, collecting uncondensed gas and reusing it. The device comprises screw feeder, adjustable speed motorm, high temperature fused pump, impinger, cyclone filter, char collecting device, gas- water exchanger, oil collector, main electric heater, auxiliary electric heater, and high temperature ionic liquid storage tank. The invention is characterized by homogenous mixing of biomass particles with high temperature ionic liquid, stable temperature field, fast biomass thermal cracking, and simple and compact thermal cracking device structure.

The invention discloses a pure-oxygen-atmosphere annealing device and method. According to the method, a material required for being annealed is loaded into quartz tubes, the quartz tubes are placed in an aluminum-oxide ceramic sleeve which is uniformly wound by nickel-chromium wires, oxygen of stable flow is introduced into the quartz tubes, the internal furnace temperature is uniformly and slowly increased, heat of a heater is transferred to crystals to be annealed in a radiation manner, and a temperature control instrument controls a heating-up rate, the degree of a constant temperature, the time for constant temperature and a cooling rate, so that the fully-automatic unattended annealing is realized, and the annealing temperature can reach 1,300 DEG C. The pure-oxygen-atmosphere annealing device and method disclosed by the invention are applicable to the pure-oxygen-atmosphere annealing of materials, such as laser crystals, scintillation crystals and the like, the annealing efficiency is high, and the light emitting efficiency of the laser and scintillation crystals can be increased by 20-40%; after annealing, the brightness, transparency, crystalline perfection and optical uniformity of the crystals can be greatly improved; and the pure-oxygen-atmosphere annealing device has the advantages of stable temperature field, simplicity and reliability, good universality and low energy consumption, so that the annealing cost is reduced.

The invention relates to a silicon carbide crystal and a preparation method thereof, belonging to the field of crystal material preparation. The preparation method of the silicon carbide crystal comprises the following steps of: sublimating the raw materials in the crucible main body, and carrying out gas phase transmission to the surface of a seed crystal through a spiral gas flow channel formedby at least one spiral clapboard component to carry out crystal growth to prepare the silicon carbide crystal. The preparation method of the silicon carbide crystal disclosed by the invention changesthe gas phase transmission mode for preparing the carbonized single crystal by the traditional PVT method, converts the traditional vertical upward transmission into spiral upward transmission, realizes effective blocking of large particle impurities in the crystal growth process, reduces the defect density in the crystal, and improves the crystal quality. The energy consumption is reduced. The application can control the gas phase transmission under vacuum, the single crystal growth rate under vacuum is fast, the growth temperature is low, and the gas phase can be transmitted upwards in an orderly way, the defects of the grown crystals are few, and the cost is reduced and the efficiency is increased.

An amorphous alloy ribbon stretching device combined with a nanoindenter comprises a base, a high-precision turbo-type coarse and fine tuning differential head, fixed columns, a movable baffle, a fixed baffle, a motor, a motor power supply, a gear, a sample holder, clamps and a remote control, wherein the high-precision turbo-type coarse and fine tuning differential head is located between the fixed columns, one end of the high-precision turbo-type coarse and fine tuning differential head is connected with the movable baffle, the fixed baffle is located at one end of the base and is integrally connected with the base, a spring is sandwiched between the movable baffle and the fixed baffle, the sample holder is arranged on the base and located between the movable baffle and the fixed baffle, the clamps are attached to the sample holder, the motor and the motor power supply are fixed on the base, and a drive shaft of a micro motor is connected with the high-precision turbo-type coarse and fine tuning differential head through the gear. The device is used for testing micro-nano rheological mechanical behaviors, and has controllable deformation and strain and high accuracy. The device is particularly suitable for testing micro-nano mechanical behaviors of a film material in different tensile strain states in a tensile strain process.

The invention provides a method for growing thallium bromide monocrystal by spontaneous nucleation, comprising the following steps of: 1) filling a thallium bromide material into a cylindrical ampoule with diameter of 8 to 15mm, vacuumizing, sealing, and processing one end of the ampoule into a cone with the cone angle between 15 and 45 degrees; 2) placing the ampoule into a vertical tube furnace with the conical end towards the bottom of the furnace, heating the vertical tube furnace to enable the temperature of the thallium bromide material in the conical tip not to be lower than the melting point of thallium bromide, raising the temperature from the conical tip upward to the inside of a top area of the thallium bromide material with the temperature gradient between 1.0 and 1.5 DEG C/mm, and then, insulating; 3) reducing the temperature of the tube furnace to between 450 and 460 DEG C at the speed between 1 and 5 DEG C/h; and 4) cooling the ampoule to room temperature along with the furnace. Because a heater and the ampoule are not required to be moved, the invention saves the complicated mechanical transmission device, simplifies the technology and reduces cost. The ampoule and the heater are both fixed, the temperature field is stable, heat inside the crystal and molten mass is uniformly distributed, a convex growth interface can be easily acquired, and the thallium bromide with good integrity and considerable size can be grown.

The invention relates to a method and a device for simulating formation temperature in a multi-element thermal fluid injected oil extraction three-dimensional simulation test. A model body is fixed in a hyperbaric chamber; thermocouples are distributed in the hyperbaric chamber to be connected with a computer; two electric heating coils are positioned on upper and lower inner walls of the hyperbaric chamber and are connected with two upper and lower temperature controllers one outside the hyperbaric chamber; and two circulating fluid coils are positioned on the upper and lower inner walls of the hyperbaric chamber and are connected with two upper and lower refrigerating devices with a compressor and two temperature controllers two, which are positioned outside the hyperbaric chamber, respectively to form two upper and lower enclosed circulation loops. Air ducts are arranged in end covers on two sides of the hyperbaric chamber; two magnetic stirrers are positioned on the end covers on two sides of the hyperbaric chamber; and blades of the magnetic stirrers are arranged in the air ducts of the hyperbaric chamber and pass through the end covers of the hyperbaric chamber to be connected with a motor outside the hyperbaric chamber through a motor shaft. The method and the device have the advantages of compact system structure, uniform and stable simulated temperature field, wide range of the simulated temperature, quick temperature rise/reduction process, and low energy consumption.

The invention relates to an amorphous alloy coating tension device using with a nanoindentor. The amorphous alloy coating tension device comprises a base, a high-precision worm type coarse and fine tuning micrometer head, fixed vertical columns, a movable baffle plate, a fixed baffle plate, an elastic base sheet, a motor, a power source of the motor, and a gear, wherein the high-precision worm type coarse and fine tuning micrometer head is positioned between the fixed vertical columns, and one end of the high-precision worm type coarse and fine tuning micrometer head is connected with the movable baffle plate; the fixed baffle plate is positioned at one end of the base, and is connected with the whole base; the elastic base sheet is clamped between the movable baffle plate and the fixed baffle plate; the motor and the power source of the motor are fixedly arranged on the base; a transmission shaft of the miniature motor is connected with the high-precision worm type coarse and fine tuning micrometer head through a gear. When the amorphous alloy coating tension device is jointly used with the nanoindentor to test the hardness, and the micronanometer rheological mechanics behaviors of viscoelasticity, anelasticity and the like, the continuous tensile deformation of amorphous alloy is realized, the deformation amount and strain are controllable, and the precision is high. The device is especially suitable for testing the micronanometer rheological mechanics behaviors of coating material under different tensile and strain states in the tensile and deformation process.

The invention provides a purification device for high-purity indium. The purification device comprises a quartz tube, a plurality of resistance heaters and a guide rail. Two ends of the quartz tube are fixed along the horizontal directions by the aid of a left flange sleeve and a right flange sleeve, and a graphite boat is arranged in the quartz tube; the resistance heaters are arranged on the outer side of the quartz tube and are sequentially arranged along the horizontal directions of the quartz tube, and cooling devices are arranged between the adjacent resistance heaters; the resistance heaters are fixed by the aid of the guide rail, and the guide rail is provided with a left stopper, a slide wire groove and a right stopper. Compared with the prior art, the purification device for thehigh-purity indium has the advantages that the resistance heaters are sequentially arranged on the outer side of the quartz tube along the horizontal directions, and accordingly zone melting and directional solidification can be simultaneously implemented; the temperatures of the resistance heaters are controlled, multistage heating can be implemented, uniform heating temperature gradient distribution and stable temperature fields can be guaranteed, accordingly, integral purification procedures are high in efficiency, and 6N-7N ultrahigh-purity indium production requirements can be met.

The invention discloses an automatic adjustment control device for a mold temperature field, which solves the problem that the conventional thermocouple can conduct point measurement and cannot comprehensively measure the distribution of mold temperatures by acquiring temperature field information of a mold through an infrared shooting mode. The automatic adjustment and control device can perform continuous process control on the mold and adjust the temperature field of the mold in real time so as to ensure the stability of the temperature field of the mold in production.

A process for thermocracking the biologic mass with low energy consumption includes continuously feeding the biologic mass into fluidized-bed reactor, gasifying, separating carbon particles from gas,collecting carbon particles, cooling the gas by gas-gas heat exchange, cooling the gas to 40 deg.C further by gas-water heat exchanger to obtain condensed oil, and heating the residual gas for circulation. Its equipment is composed of feeder, fluidized-bed reactor, cyclone separator, gas-gas heat exchanger, gas-water heat exchanger, oil collector, circulating blower, and electric heater.

The incinerator for medical garbage includes a vertical cylindrical furnace body, a top material feeder and reciprocating material hoister. The furnace body consists of a central main combustor and a ring secondary combustor in the integral structure with the main combustor, and the main combustor is provided with turnable grate and tower type crusher. The fume from the main combustor to the secondary combustor is then post-treated before exhaust to atmosphere, the combustion supporting air is divided into through paths before entering to the main combustor, and the large material and un-burnt fume are burnt for the second time in the secondary combustor. The present invention utilizes the heat of the incinerated matter fully, raised temperature of the secondary combustor, and low running cost.

The invention provides an arc jet nozzle for producing an amorphous thin belt. The middle of the arc jet nozzle is transversely hollowed out to form a cavity. One or more reinforcing ribs are reserved at the hollowed-out position. The edges, close to the four stand sides of the arc jet nozzle, of the cavity are all in convex arc streamline shapes. A jet seam is reserved below the cavity. According to the arc jet nozzle for producing the amorphous thin belt, the internal structure of a jet nozzle in the prior art is optimized, the amount of liquid steel inside the jet nozzle is small, the temperature field is stable, no eddy and no dead zone exist, the belt material yield is high, and the belt material production efficiency is improved.

The invention discloses a magnesium alloy wide plate three-roll casting-rolling mill. The casting-rolling mill has the advantages of the two-roll casting-rolling mill and the four-roll casting-rolling mill, overcomes the defects thereof and is characterized by fast solidifying speed and cooling speed, high rolling pressure and good plate shape control. The three-roll casting-rolling mill can be used to cast and roll liquid magnesium alloy to casting-rolling strips with 800mm-1800mm of width, large deformation and good plate shape; and the main body of the casting-rolling mill is designed to be a reducing three-roll casting-rolling mill. By using the three-roll casting-rolling mill, the technological parameter indexes, such as stable liquid stream, uniform current distribution, stable temperature field, large unit rolling pressure and good plate shape, of the casting and rolling requirements of the magnesium alloy wide sheet are easy to realize.

The invention relates to a heating device for hydride vapor phase epitaxy (HVPE) growth. The heating device comprises five heating temperature regions, an in-furnace heating module, a heating furnace body and a heating furnace shell, wherein the heating furnace body is divided into an auxiliary heating temperature region and a material growing heating constant-temperature region; each heating temperature region is provided with a plurality of heating modules and internal temperature sensors thereof. With the adoption of the heating device, each heating module and an internal temperature sensor thereof are respectively connected with an automatic temperature controlling circuit, heating power of each heating module is reasonably regulated by the automatic temperature controlling circuit, and combined with a type and a heating mode of each heating module set in the each heating temperature region, temperature of each temperature region is independently and precisely controlled in a preset temperature range, thus realizing uniform and stable temperature distribution in an in-furnace temperature field. The heating device is particularly suitable for growth of materials in large-area region.

This invention relates to a method for preparing heterovalent ions-doped high-luminescence-yield lead tungstate crystal and its preparation method. The high-luminescence-yield lead tungstate crystal is doped with F- 100-8000 ppm, Sb3+ 100-5000 ppm, and Mo6+, V5+, Nb5+, Zr4+, and Ti4+ 0-10000 ppm, and is prepared via modified Bridgman method by using platinum crucible. The method can be used for preparing several strands of lead tungstate crystals in one process, and is suitable for mass production. The obtained heterovalent ions-doped high-luminescence-yield lead tungstate crystal has such advantages as rapid attenuation and high luminescence yield.

The invention belongs to the metering technology field, and concretely relates to a method for temperature calibration by means of a benzoic acid freezing point temperature level ground. The invention also relates to a device adopted by the above method. The method includes the steps of making a benzoic acid freezing point bottle and conducting temperature calibration. The device comprises a benzoic acid freezing point bottle and a benzoic acid freezing point reproduction storage device. The benzoic acid freezing point bottle and the benzoic acid freezing point reproduction storage device are combined together at about 122 DEG C to conduct temperature calibration by means of a benzoic acid freezing point temperature level ground. The beneficial effects of the invention are: firstly, the calibration accuracy is high, and secondly, good reliability is achieved. The method and the device are of practical significance in tracing a specific key temperature spot.

The invention provides a reaction device and a system and a method for synthesizing acetic acid from carbonyl. The reaction device comprises a reaction kettle, a circulating fluid stirring part and a raw material gas distribution stirring part. The gas distribution stirring part comprises more than two gas distribution stirring units, and the more than two gas distribution stirring units are distributed in multiple layers along the central shaft of the reaction kettle and are communicated. A circulating fluid feeding pipe penetrates through a circulating fluid inlet and is communicated with a circulating fluid outlet. A raw material gas feeding pipe penetrates through a raw material gas inlet and is communicated with the gas distribution stirring part. When the reaction device is used for synthesis of acetic acid from carbonyl, a shaft seal and a bottom fixed bearing are prevented from being easily damaged in the operation process during mechanical stirring, there is no movable sealing point, and safe and stable operation of a reaction system is guaranteed. Meanwhile, the more than two gas distribution stirring units which are distributed in multiple layers and are sequentially communicated enable gas in the reaction kettle to be distributed more uniformly, the gas-liquid two-phase mixing effect is improved, the reaction state in the system is optimized, the temperature difference in the reaction kettle is reduced, and side reactions are reduced.

The invention provides a sapphire crystal growth furnace, which comprises an annular inner heater and an outer heater and a plurality of crucibles uniformly arranged between the inner heater and the outer heater, and a cooling device is provided at the bottom of the crucible, so that The power of the inner heater and the outer heater is controllable. A sapphire crystal growth furnace provided by the present invention adopts two kinds of ring-shaped tungsten heaters with different diameters. The tungsten crucible is placed between the two ring-shaped heaters, and the tungsten crucible is evenly and symmetrically distributed. A cooling device is installed at the bottom of each crucible. By controlling The power of the heater and the flow rate and temperature of the cooling medium form a stable temperature field and thermal field, thereby greatly improving the utilization rate of sapphire crystal growth materials and the crystallization rate of large-sized crystals, and reducing production costs.