360 results about "Cooling temperature" patented technology

The invention relates to the technical field of roller cooling, and discloses a roller cooling temperature control method and system.The method comprises the steps that the length of a roller is obtained, and the roller is equally divided into N temperature monitoring areas according to the length of the roller; n pieces of detection temperature value data are obtained and preprocessed; inputting the detected temperature value data into a pre-trained state model for comparison, and obtaining a temperature prediction value; the optimal cooling water flow is calculated according to the temperature prediction value through an MPC controller; acquiring historical data of the roller, and inputting the historical data into the auto-encoder for reconstruction; inputting detection temperature value data collected in real time into the auto-encoder, and calculating a reconstruction error value; and determining a current cooling water flow control state based on the reconstruction error value, and compensating the cooling water flow to the MPC controller. The roller cooling efficiency is improved.

The invention discloses a single-phase immersed liquid cooling temperature stratification evaluation and disturbance liquid injection balance control system, and relates to the technical field of liquid cooling circulation structures. The single-phase immersed liquid cooling temperature stratification evaluation and disturbance liquid injection balance control system comprises a backflow liquid multi-point liquid inlet dynamic monitoring module used for collecting liquid cooling branch state data; the immersion liquid temperature layering monitoring module is used for evaluating the non-uniform degree of heat distribution and adjusting a disturbance liquid injection strategy; the liquid flow distribution equilibrium evaluation module is used for analyzing the matching degree of liquid flow distribution and heat dissipation and optimizing a flow direction coverage strategy; the cooling path dynamic judgment and switching module is used for evaluating the cooling state and the thermal load change and regulating and controlling the circulation path; and the immersed liquid cooling cabinet local disturbance self-balancing regulation and control module is used for guiding local convection and adjusting the disturbance direction. The problem that heat dissipation efficiency of a chip is affected by local heat accumulation in the immersed liquid cooling cabinet due to serious cold and hot lamination after backflow of a cooling liquid branch is solved.

The invention relates to the technical field of automatic control, in particular to a medical plastic tube stretching reducing equipment control method and system, and the method comprises the following steps: obtaining a heating temperature change trend by using infrared temperature measurement equipment, adjusting heating parameters, adjusting clamping parameters based on compression and rebound deformation quantities, and adjusting the clamping parameters based on the clamping parameters. The thickness uniformity is evaluated, the stretching rate control parameters are adjusted, the cooling temperature difference trend on the two sides is combined, air nozzle and fan adjustment is linked, and a cooling air field adjustment record is obtained. According to the method, the heating abnormal response state is judged in combination with the temperature change rate, heating output parameters are adjusted through the slope trend in the continuous time period, the clamping stability is monitored based on the instantaneous compression and springback difference after the clamp makes contact, the thickness is inversely solved through the multi-channel light intensity, and thickness residual data are established in combination with the difference in all directions in the section. A periodic thickness error change trend is called to identify tensile stability deviation, and a cooling wind direction structure is regulated and controlled by combining the temperature difference change direction of the two sides of the guide pipe cooling stage.

The condensation pump type dilution refrigerating machine with the booster pump comprises the pre-cooling module and the dilution module, the pre-cooling module provides the required pre-cooling temperature for the dilution module, the dilution module uses the booster pump working at 1K, 3He circulation is achieved through cooperation of the booster pump and the condensation pump, no room-temperature circulation system is arranged, and therefore the dilution effect is good. And the defects of high heat loss and high compression power consumption in a room temperature circulation mode are overcome. Meanwhile, due to the fact that the booster pump is used, the system can obtain larger circulating flow so as to achieve larger cooling capacity, and the defect that a condensation pump type dilution refrigerator obtains large refrigerating power is overcome.

The invention discloses a pipeline steel plate for carbon dioxide conveying and a preparation method thereof. In the heating procedure of the preparation method, the soaking temperature is TNbC + (40-100) DEG C, and the soaking time is 30-50 min; in the first hot rolling procedure, multiple passes are included, the plate thickness after rolling is 3.2-4.2 t, the initial rolling temperature is Tnr + (5-25) DEG C, and the final rolling temperature is Tnr + (0-20) DEG C; in the water cooling process, the final cooling temperature is Ar3-20 DEG C-Ar3 + 15 DEG C; in the second hot rolling procedure, multiple passes are included, the plate thickness t after rolling is larger than or equal to 38 mm, and the initial rolling temperature and the final rolling temperature are both Ar3-20 DEG C-Ar3 + 15 DEG C; in the ultrafast water cooling process, the water inlet temperature is larger than or equal to Ar < 3-30 > DEG C, the final cooling temperature is Bs-(460-300) DEG C, and the cooling rate is 9-22 DEG C / s; and in the air-cooling self-tempering process, the steel plate is air-cooled to the room temperature on a cooling bed.

The invention discloses a cooling tower operation state monitoring method and system based on big data analysis, and relates to the technical field of data processing, and the method comprises the steps: obtaining water temperature data of an inlet and an outlet of a cooling tower, calculating a cooling temperature difference, and carrying out the cooling efficiency evaluation based on a time sequence temperature relation; analyzing the relationship between the control parameters of each level of the cooling tower in combination with historical operation data and a field big data sample, and establishing a level control analysis path; and on the basis of the cooling target of the heat source equipment, analyzing control parameters of each level through the time sequence cooling efficiency, identifying the running state of the cooling tower, and sending state feedback information. The technical problems that existing cooling tower operation state monitoring depends on simple static measurement, dynamic optimization and real-time adjustment of control parameters of all levels are lacked, and the operation efficiency of the cooling tower is affected are solved, and the purposes that the control parameters are dynamically optimized in real time through big data analysis and multi-level control analysis, and the operation efficiency of the cooling tower is improved are achieved. And the operation efficiency of the cooling tower is improved.

The invention relates to the technical field of laboratory equipment, in particular to an incubator heating and cooling temperature detection system and method.The incubator heating and cooling temperature detection system comprises a temperature detection module, a temperature setting module, a temperature calculation module and a temperature control module; threshold data of the test box can be set through the temperature setting module, the temperature calculation module calculates the temperature data based on the threshold data to obtain calculation data, and the temperature control module controls the temperature of the test box based on the calculation data. According to the method, the temperature of the test box can be effectively detected and controlled through the arrangement of the temperature detection module, the temperature setting module, the temperature calculation module and the temperature control module, so that the problem that the temperature of an existing test box cannot be pre-adjusted is solved.

According to the multi-path cooling control method for the non-adjustable flow of the cooling spray box after hot plate rolling, the mode that an annular rail is combined with a trolley is adopted, the trolley bears a sample through a sample bearing table to do annular motion, the annular rail is an oval rail comprising two parallel linear segments and two semicircular segments, and at least one cooling spray box is arranged along the linear segment rail; the cooling area can be infinitely lengthened at any workpiece speed; according to the cooling starting temperature, the water cooling speed, the cooling stopping temperature, the cooling stopping time between the cooling areas and the production line cooling spray box layout of the N cooling areas determined by the experiment, the experiment device is configured according to different spray box opening modes, the cooling experiment is carried out, and spray box opening mode parameters corresponding to the optimal cooling speed of the N cooling areas are obtained; carrying out cooling control after rolling on corresponding sample production; besides, the method is implemented under the condition basically consistent with the actual working condition of the production line, so that the product design output and the production line process control are more accurate and efficient, the product research and development speed can be effectively increased, the process control precision is improved, and the production line trial-manufacturing cost is reduced.

The invention relates to the technical field of die-casting processes, in particular to a shell die-casting cooling method and system.The method comprises the steps that the shell die-casting cooling process is simulated and analyzed through computer simulation software according to shell features, and the optimal layout and size of a cooling pipeline in a die-casting die are determined; a determined cooling pipeline is machined on the die-casting die, and a temperature sensor and a flow control valve are installed to monitor the temperature of the shell in each area and the temperature and flow of a cooling medium in the cooling process in real time; molten metal is injected into the die-casting die, and an air cooling system is started for primary air cooling; after the shell is preliminarily formed, a water cooling system is started, and sectional type cooling is adopted according to a computer software simulation result; the temperature sensor collects shell temperature data in real time and transmits the shell temperature data to the control system in real time, and the control system automatically adjusts the flow and temperature of a cooling medium through the flow control valve according to a preset temperature curve. And after water cooling is finished, the air cooling system is started again, and secondary air cooling is conducted on the shell.

The invention provides a food pre-cooling temperature prediction method and device based on deep learning, and the method is characterized in that the method comprises the steps: obtaining the temperature time sequence data of a plurality of temperature measurement points based on the given technological parameter data measurement in the ventilation pre-cooling process of target food; preprocessing the temperature time sequence data to obtain a temperature fusion feature sequence; and inputting the temperature fusion feature sequence into a fusion deep learning model, and outputting a temperature prediction result. According to the method, errors caused by manual intervention are reduced, and the precision of temperature prediction in food ventilation and precooling is remarkably improved.

The invention discloses a wind-water combined heat dissipation method and device for a hydraulic station, and relates to the technical field of hydraulic heat dissipation control. The wind-water combined heat dissipation method comprises the steps that an expected die-casting plan of a target die-casting machine is read; an expected working load is determined, temperature rise trend prediction of oil liquid of the multiple hydraulic components is carried out, and multiple predicted oil temperatures are output; performing cooling demand analysis, and determining a plurality of initial cooling temperature values; carrying out lubrication performance attenuation analysis, compensating the plurality of initial cooling temperature values, and outputting a plurality of cooling temperatures; a wind-water combined heat dissipation twin model is constructed, heat dissipation parameter simulation optimization is carried out, and an optimized heat dissipation control strategy is output; and according to the optimized heat dissipation control strategy, heat dissipation control in the cooling backflow period is conducted on the target hydraulic station. The technical problems that in the prior art, heat dissipation accuracy and practicability are insufficient, and the working quality and working efficiency of the hydraulic station are affected are solved, and the technical effects that the heat dissipation accuracy and practicability of the hydraulic station are improved, and the working efficiency and working quality of the hydraulic station are improved are achieved.

The invention discloses a coil pipe cooling immersed box body coupled with a CO2 energy storage system. The coil pipe cooling immersed box body comprises a box body, a box cover and a cooling coil pipe, the box body is filled with cooling liquid, the density of the cooling liquid is reduced along with the rise of the temperature in the temperature range needing to be cooled, a part to be cooled is immersed in the cooling liquid, the cooling liquid forms circulation around the cooling part, and a vertical channel is formed in the box body; the box cover is covered on the box body; the cooling coil pipe is installed in the vertical channel, a circulating medium in the cooling coil pipe is subcritical carbon dioxide, and the cooling coil pipe is coupled with a CO2 energy storage system, so that the effects that the structure is simple, installation is convenient and fast, the temperature difference in the box body is reduced through CO2 phase change heat absorption, and the cooling efficiency is high are achieved.

The invention provides a finish rolling inlet temperature forecast control method and device, electronic equipment and a storage medium, and relates to the technical field of steel rolling, and the method comprises the following steps: firstly, constructing a temperature forecast control model based on historical data in the hot rolling cooling process of different plates, and then according to the temperature data collected at the real temperature and the output result of the temperature forecast control model, calculating the temperature forecast control value; dynamically adjusting parameters of the temperature forecast control model; based on the deviation between the temperature distribution predicted by the temperature forecast control model and the target temperature distribution, parameters of a cooling system are adjusted so as to control the cooling temperature of a finish rolling inlet; through the method, the technical problem that the cooling temperature control precision is low in the hot rolling production process is solved, and the technical effects of improving the temperature stability of a finish rolling inlet, and improving the cooling efficiency and the product quality stability are achieved.

The invention discloses corrosion-resistant and low-temperature-resistant carbon dioxide pipeline steel and a preparation method thereof. The preparation method comprises the following steps: preparing a continuous casting billet through smelting and continuous casting; the temperature of a soaking zone is TNbC + (40-100) DEG C, and the duration of the soaking zone is 30-50 min; the continuous casting billet is rolled into a steel plate with the thickness t larger than or equal to 38 mm through recrystallization zone rolling and two-phase zone rolling; the initial rolling temperature of recrystallization zone rolling is Tnr + (5-25) DEG C, the final rolling temperature is Tnr + (0-20) DEG C, and the plate thickness after rolling is 3.2-4.2 t; both the initial rolling temperature and the final rolling temperature of two-phase region rolling are Ar3-5 DEG C to Ar3 + 15 DEG C; after the steel plate leaves the rolling mill, the steel plate enters an ultra-fast cooling system for water cooling, the water entering temperature is larger than or equal to Ar < 3-30 > DEG C, the final cooling temperature is Bs-(340-300) DEG C, and the cooling rate is 9-22 DEG C / s; and the steel plate is air-cooled to room temperature through a cooling bed after being discharged.

The present invention discloses a cavity water-cooled temperature-controlled mold, comprising a bearing plate, an off-the-ground support frame and a suspended support frame, and also comprising a glass pressing mechanism, a water-cooled temperature-control mechanism and a demoulding lifting mechanism. The bottom end of the bearing plate is provided with an off-the-ground support frame, the upper end of the bearing plate is provided with a suspended support frame, the middle part of the suspended support frame is provided with a glass pressing mechanism, the middle part of the glass pressing mechanism is provided with a water-cooled temperature-control mechanism, and the bottom surface of the bearing plate is provided with a demoulding lifting mechanism. The cavity water-cooled temperature-controlled mold provided by the present invention presses the glass by setting a water-cooled temperature-control mechanism to cooperate with the glass pressing mechanism, and the middle parts of the dynamic pressing mold and the static pressing mold are respectively provided with annular cooling holes and U-shaped cooling water guide grooves, which can quickly cool the inside and outside of the pressed glass at the same time, thereby increasing the cooling speed of the glass, and at the same time avoiding the problem of low yield rate due to injection molding, thereby effectively improving the yield rate of pressing.

The invention relates to the technical field of plastic molding, in particular to a plastic pad extrusion molding cooling device which comprises a vertical frame, a fixed cylinder, a roller, a spiral sleeve and a detection assembly. The roller is divided into a plurality of cooling cavities for independently supplying water, water is supplied to the cooling cavities at the same time, the problem of uneven cooling caused by water flowing is solved, the spiral sleeve forcibly cools water to form turbulent flow, and compared with smooth laminar heat exchange, the cooling efficiency is improved, and the service life of the roller is prolonged. Then, the cooling temperature is detected in real time by means of the detection assembly, external supplementary cooling is conducted according to the situation, and therefore the mode that water is independently supplied to the multiple cooling cavities for turbulent cooling and matched with external supplementary cooling is formed, and the uniform cooling degree of the plastic pad is comprehensively improved; and the quality problems of buckling deformation, sinking, shrinkage and the like of the plastic pad caused by non-uniform cooling are avoided.

The invention relates to the technical field of liquid nitrogen preparation, in particular to integrated equipment for preparing nitrogen by a refrigerant method, which comprises an E1 heat exchanger, a separator VF1, an E2 heat exchanger, an E3 heat exchanger, an E4 heat exchanger, a separator VF2 and a liquid storage tank VF3 which are connected in sequence, the E1 heat exchanger, the E2 heat exchanger, the E3 heat exchanger and the E4 heat exchanger are used for gradually cooling nitrogen so that the nitrogen can be converted into liquid nitrogen. According to the method, the cooling temperature is reduced to-183 DEG C in the E4 subcooler, the supercooling degree of liquid nitrogen is improved, and the liquefaction efficiency of nitrogen is better improved; and meanwhile, the vaporization phenomenon of the liquid nitrogen in the storage process is well inhibited. Even if the temperature of the storage environment fluctuates, the liquid nitrogen at-183 DEG C can be kept in a liquid state, so that the volatilization loss is reduced, the storage cost is reduced, and the stable quality of the liquid nitrogen in long-term storage is ensured.

The utility model relates to a calcined coke waste heat utilization system, and belongs to the technical field of waste heat recovery. The device comprises a first-stage cooler, a second-stage cooler, a waste heat lifting device and a deaerator, and calcined coke is cooled and output sequentially through the first-stage cooler and the second-stage cooler; the first-stage cooling pipe is communicated with the heating medium pipe to form a circulating pipeline, and external softened water is communicated with a second deoxidizing inlet of the deaerator through a first refrigerant pipe; external softened water is connected with an inlet of the second-stage cooling pipe through a second refrigerant pipe, an outlet of the second-stage cooling pipe communicates with a first inlet of the deaerator, and an outlet of the deaerator conveys high-temperature water to the outside. The system is simple in structure, waste heat of calcined coke can be recycled more sufficiently, energy waste is avoided, steam can be heated by the recycled waste heat of the calcined coke, steam cost is reduced, energy is saved, the system is stable and reliable, calcined coke materials with the temperature below 100 DEG C can be output, and energy is saved. And the discharge temperature of the calcined coke is low, so that the requirement on the cooling temperature of the calcined coke material can be met.

An additive manufacturing method includes a heating step, a manufacturing step, a cooling step, a cutting step, a first correction step, and a second correction step. In the heating step, a build table is heated to a preheating temperature. In the manufacturing step, a solidified layer is formed. In the cooling step, the build table is cooled to a cooling temperature. In the cutting step, a cutting process is performed on the solidified layer. In a first correction step executed after the heating step and before the manufacturing step, a positional misalignment of the base plate is measured, and a coordinate system used in the manufacturing step is corrected. In a second correction step executed after the cooling step and before the cutting step, a positional misalignment of the base plate is measured, and a coordinate system used in the cutting step is corrected.

The present application relates to a rotary kiln cooler with external air chamber, comprising upper bin body, ring beam, central air distributor, chamber air distributor, lower cone bin, discharging cone and air supply pipeline; the rotary kiln cooler uses two different cooling methods to cool materials at different heights; in the upper part of the cooler, a plurality of air distributors embedded in the material layer and adapted to the shape characteristics of the material layer directly supply air to the material layer for pre-cooling; in the lower part of the cooler, the material is divided into multiple streams, and a plurality of air supply chambers are arranged to achieve uniform cooling in multiple regions; the cooler has simple structure, low material cooling temperature, can cool high-temperature materials from about 1100 DEG to more than 30 DEG to 50 DEG above room temperature, and has sufficient cooling, no red material inclusion, high thermal efficiency, and remarkable energy saving and emission reduction effect.

The invention discloses a fluid vacuum cooling method based on critical shear rate control. The fluid vacuum cooling method comprises the following steps: placing a fluid material in a rotationally symmetrical vacuum cavity with a material container; establishing a vacuum environment, and enabling the ultimate vacuum pressure in the vacuum cavity to be lower than the saturated vapor pressure corresponding to the target cooling temperature; stirring the fluid material to form a water directional migration channel pointing to the surface from the interior of the material; the stirring shear rate gamma is controlled to be larger than or equal to the critical shear rate gamma crit, a pressure shell layer in fluid is destroyed, an evaporation area is transferred to the surface from the interior of a material, and splashing is fundamentally restrained; and meanwhile, centrifugal backflow of splashing liquid drops is realized by adopting a rotary symmetrical vacuum cavity. Therefore, the splashing of fluid vacuum cooling is greatly reduced, the vacuum cooling time is shortened, and the cooling efficiency is greatly improved.

The invention relates to the technical field of profile machining, and provides a method, equipment and medium for preventing cooling waves by adding back ribs to a profile, and the method comprises the following steps: obtaining the size specification of the profile to be produced and machined, and judging whether the profile is subjected to wave deformation due to non-uniform cooling in the cooling process; in addition, back ribs are arranged in the section bar to optimize the section structure of the section bar, and wave deformation caused by uneven cooling is counteracted. Before the profile to be produced and machined is produced, the section structure of the profile is optimized by arranging the back ribs, the wave deformation phenomenon after the profile is cooled can be avoided, and the problems that the profile is affected by uneven cooling temperature in the cooling process, the middle of the surface of the profile is subjected to wave deformation after being cooled, a customer cannot use the profile, and the service life of the profile is prolonged are solved. And the appearance of the profile is seriously influenced.

The present invention provides a dynamic energy-saving control method, system, and medium for a variable-frequency air handling unit. The method comprises: obtaining a current value of a post-surface cooling temperature, a temperature setpoint and a humidity setpoint, a return air temperature, a return air humidity, a user-set operating mode of the air conditioning system, and a direct expansion control word. A target dew point temperature is found based on the temperature setpoint and the humidity setpoint; a dynamic temperature setpoint is found based on the return air temperature and the temperature setpoint; based on the operating mode and the direct expansion control word, the air conditioning system dynamically configures a post-surface cooling temperature control target value according to the temperature setpoint, the return air temperature, the dynamic temperature setpoint, and the target dew point temperature; and finally, adjusting the frequency of the variable-frequency compressor of the air conditioning system through closed-loop control, using the post-surface cooling temperature control target value as the target value and the current post-surface cooling temperature value as the current value.

The purpose of the present disclosure is to provide an ozone generation device that can, in a structure having an object-transfer internal member, reduce environmental load and extend service life without decreasing the efficiency of use. In the present disclosure, an outer frame member (31) has an opening (31b), and an object-transfer internal member (32) is provided in the opening (31b). The object-transfer internal member (32) has a diameter variation property in which the member diameter (d2) becomes less than the opening diameter (d1) of the opening (31) at a cooling temperature (T1) or lower, and the member diameter (d2) becomes equal to or greater than the opening diameter (d1) in a non-cooling temperature range (TH). At a boundary surface (33) between the outer circumferential surface of the object-transfer internal member (32) and the inner circumferential surface of the opening (31b), the object-transfer internal member (32) and the opening (31b) are tightly attached to each other without having another member interposed therebetween.

The present invention discloses a manufacturing process for a riser joint of an offshore oil and gas platform, relating to the technical field of preparation, including: the manufacturing process selects forgings with specific components, smelts them through an electric furnace or an oxygen converter, and conducts forging, isothermal annealing, final heat treatment, and mechanical property testing; the method for monitoring the isothermal annealing temperature includes: monitoring the temperature in the furnace cooling stage, calculating the isothermal trade-off value to determine the isothermal analysis point; constructing an isothermal gradient field, analyzing the temperature change, constructing an equivalent cooling temperature curve, and comparing it with the continuous cooling transformation curve of supercooled austenite; if the trend of the curve changes inconsistently, judge whether the current temperature is in the bainite stage, and if not, judge the regulation margin; if the regulation margin is insufficient, calculate the approximate time difference, regulate the temperature in stages, and improve the stability of the process.

The utility model provides an air-cooled temperature uniformity control device and a meat cabinet, and belongs to the technical field of meat cabinets. Comprising a cabinet body; the refrigeration fan is mounted on the cabinet body; the plurality of ventilation pipes are arranged on the cabinet body and the refrigeration fan; and the air outlet part is mounted on the cabinet body, and the air outlet part comprises an air guide plate. Through the arrangement of the refrigeration fan, the ventilation pipe, the air guide plate and the micropores, the problem of local supercooling possibly caused by the operation of the air cooling device under the conditions of fewer articles and more open space is solved, the energy waste is further reduced, the food quality is ensured not to be influenced, and due to the uniform distribution design of the micropores, the food quality is improved. The cold air can be more uniformly diffused to each corner in the cabinet body, even under the condition that the number of articles is small, the local supercooling phenomenon can be avoided, it is ensured that the temperature in the whole cabinet body is kept within an ideal range, the requirement for food fresh keeping is met, and excessive consumption of energy is avoided.

The invention relates to a method for controlling the temperature uniformity of the cross section of hot-rolled strip steel, which is characterized in that a plurality of laminar cooling temperature control groups corresponding to the width of the strip steel are arranged at the starting end of laminar cooling, the edges of upper spray headers in the laminar cooling temperature control groups are blocked to form trapezoidal cooling areas, and the gradual expansion direction of the trapezoidal cooling areas is consistent with the rolling reverse direction of the strip steel; and in the cooling process, a layer cooling temperature control group is correspondingly input according to the width of the strip steel. According to the invention, the layer cooling temperature control group adopts trapezoidal cooling, so that the temperature of the edge part of the strip steel is more uniform, the influence on the product quality due to larger stress difference or strength difference between the edge part of the strip steel and the central area is avoided, and the layer cooling input group can be automatically selected according to different strip steel widths; and the defect that nozzle plugs need to be frequently assembled and disassembled on site when the width is changed is avoided.

The invention provides a liquid nitrogen cooling system for maintaining continuous infiltration of the upper surface of a cold cavity. The liquid nitrogen cooling system comprises a liquid nitrogen Dewar, a gas-liquid separator and a cooling temperature control cavity, wherein the liquid nitrogen Dewar is used for providing low-temperature liquid nitrogen; one end of the gas-liquid separator is connected with the liquid nitrogen Dewar through a liquid-phase pipeline, the bottom of the other end of the gas-liquid separator is connected with the cooling temperature control cavity through a liquid-phase pipeline, and the top of the gas-liquid separator is connected with a gas-phase pipeline for exhausting gas; a temperature sensor and an acoustic emission probe are mounted in the cooling temperature control cavity, the temperature sensor is used for monitoring the wall surface temperature change of the cooling temperature control cavity in real time, and the acoustic emission probe is used for monitoring a high-frequency elastic wave signal in the cooling temperature control cavity; the wetting state of the upper surface of the cooling temperature control cavity can be judged, so that liquid nitrogen on the surface of the cooling temperature control cavity is conveniently controlled, the cooling temperature control cavity is prevented from entering a dry condition, and the liquid nitrogen heat exchange efficiency is improved.

The heat treatment equipment comprises an inner furnace body, an outer furnace body, a vacuumizing component, a heating temperature control component, a cooling temperature control component, a heat exchange component, a fan component and a spray cooling component, all the parts are specifically arranged, particularly, the heating parts which are arranged in the heating stage and the heat preservation stage and are arranged for the shaft elements, independent control over all the areas and independent control over all the areas of the spray nozzle are adopted, and the specific arrangement mode in the heat treatment process is combined; particularly, high-pressure inert gas quenching and atomized cooling liquid composite cooling are combined, and independent control of a spray nozzle is matched, so that more uniform and reliable heating, heat preservation and quenching of the shaft element are realized, and the fatigue life and the dimensional stability of the shaft element are remarkably improved.

The application discloses a control method for cooking rice by a cooking utensil and the cooking utensil. The cooking utensil comprises an inner container for cooking rice, a heating device, a temperature sensor and a fan. The control method comprises a low-temperature water absorption stage, a heating temperature rising stage, a boiling stage, a high-temperature rice stewing stage and a fan cooling temperature reducing stage. The boiling stage comprises at least one boiling gradient control stage. In the boiling gradient control stage, the heating device is controlled to heat the bottom temperature of the inner container, so that the temperature rising rate of the bottom temperature of the inner container is in a required rate range. After the bottom temperature of the inner container reaches a boiling gradient temperature detected by the temperature sensor, the heating device and the fan are jointly controlled to maintain the bottom temperature of the inner container. When the time length during which the bottom temperature of the inner container is at the boiling gradient temperature is greater than a preset gradient stage time length, the heating device is turned off, and the fan is controlled to work, so that the bottom temperature of the inner container returns to an initial bottom temperature of the initial boiling stage.