2288 results about "Convection flow" patented technology

The invention relates to the technical field of intelligent control, and discloses a self-adaptive temperature curve control system for high-temperature alloy vacuum casting, which comprises a sensing module, a control module and a control module, and is characterized in that the sensing module acquires multi-point temperature information and preprocesses the information to obtain temperature distribution in a furnace; the acquisition module obtains vacuum environment parameters. The simulation module establishes a three-dimensional dynamic coupling model based on heat conduction, radiation, convection and phase change heat effect, and obtains a real-time temperature evolution prediction result. The generation module obtains a target temperature curve of the corresponding stage. The prediction control module collects a real-time temperature evolution prediction result and a target temperature curve, deviation calculation and trend analysis are carried out, and a heating power and cooling flow control instruction is generated. And collecting product feedback errors and carrying out self-learning correction on prediction model parameters to obtain an optimized control output result. The control and optimization of the high-temperature alloy vacuum casting temperature field are realized, and the structure uniformity of castings and the quality stability of finished products are improved.

The invention belongs to the technical field of hypersonic flight vehicle design, and discloses a design method for a thermal experiment model of a front body and an air inlet channel of a high-speed wind tunnel. The design verification method comprises the following steps: determining an overall structure and design requirements; determining a heating structure; determining a pressure measuring point and a temperature measuring point; determining an independent temperature control adjusting device; verifying the influence of the heat insulation groove on temperature gradient distribution; verifying the heat insulation effect of the heat insulation measures; model structure deformation generated by temperature is investigated; obtaining a heat flux density and surface temperature relation curve; the influence of model structure deformation on the flow field is studied. The design verification method proves that the precursor of the high-speed wind tunnel and the air inlet duct thermal experiment model have accurate temperature control and thermal insulation protection capabilities, and verifies the obvious influence of wall temperature change on the flow field structure; the aerodynamic thermal coupling effect can be effectively reproduced, a hypersonic air inlet heat-flow coupling experimental platform is established, and the experimental platform has engineering practical value.

The invention discloses an axial flux motor temperature prediction method based on equivalent thermal circuit method calculation, and the method comprises the following steps: 1, motor thermal circuit unit division: decomposing a motor into a stator unit, a rotor unit, an air gap unit and a housing unit, and constructing an equivalent thermal network through a node-branch method; 2, calculating a multi-physics coupling heat source; 3, thermal resistance parameter dynamic calculation and CFD coupling optimization: calculating conduction thermal resistance, convection thermal resistance and contact thermal resistance; and 4, parameter self-calibration based on machine learning: constructing a PINN model according to a physical law and known physical parameters, introducing a Bayesian optimization algorithm on the basis of the PINN model, adjusting and optimizing the parameters of the PINN model by using Bayesian optimization, designing a reinforcement learning algorithm, and carrying out self-calibration on the parameters of the PINN model. Enabling the reinforcement learning algorithm to dynamically adjust parameters according to the real-time operation data of the system and the prediction result of the PINN model; 5, constructing and solving a heat balance equation; and step 6, visualizing and verifying the temperature field.

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 discloses a creep test system of a turbine rotor blade film hole simulation piece and a test method of the creep test system. Comprising a clamping assembly used for fixing a test piece, a loading assembly used for applying a load to the test piece, a strain measuring assembly used for measuring the strain rate of the test piece, a heating assembly used for covering the test piece to form a heating channel, and a cooling assembly used for manufacturing and conveying cooling airflow to flow through the interior of the test piece, the strain measurement assembly is used for measuring the external temperature of the test piece and the internal temperature of the test piece, the control assembly is connected with the strain measurement assembly, the heating assembly, the cooling assembly and the temperature measurement assembly, and the heating assembly is used for manufacturing and conveying high-temperature airflow to flow through the heating channel so as to heat the outside of the test piece to a first set temperature; the cooling assembly is used for cooling the interior of the test piece to a second set temperature, and the heating assembly and the cooling assembly are used for forming a dynamic convection environment around the test piece.

The invention relates to the technical field of bus ducts, and discloses an efficient heat dissipation bus duct with a waterproof function, which comprises an upper cover plate, a lower cover plate and conducting bars vertically arranged between the upper cover plate and the lower cover plate, the conducting bars are symmetrically arranged in groups, and a heat dissipation cavity is formed between the two groups of conducting bars; the upper cover plate and the lower cover plate are respectively provided with convection heat dissipation holes communicated with the heat dissipation cavity, and the convection heat dissipation holes and the heat dissipation cavity form an air convection air channel which is used for conducting convection heat dissipation on the conducting bar. According to the invention, the conductive bars are arranged at intervals to cooperate with the convection heat dissipation holes to form the convection heat dissipation cavity for the inner cavity of the bus duct, so that the efficient heat dissipation performance of the bus duct is ensured; through arrangement of the sealing strips and the hydrophobic protrusions, on the premise that the sealing performance of the conducting bar is guaranteed, water flow in the heat dissipation cavity can be prevented from flowing to gaps among the conducting bar, the inner heat dissipation plate and the cover plate, and the waterproof performance of the whole bus duct is improved.

The invention relates to the technical field of fire-fighting simulation, and discloses a fire-fighting fire dynamic simulation system based on multi-physics field coupling. The system collects temperature field distribution data, smoke concentration gradient data, airflow velocity field data and building structure heat conduction parameters of a fire scene; establishing a bidirectional coupling model of a temperature field and a smoke diffusion field, realizing dynamic correction of a smoke convection effect by a temperature gradient through real-time data exchange, constructing a correlation model of an airflow velocity field and a heat conduction parameter of a building structure, and adjusting a velocity field vortex coefficient according to heat flow intensity; integrating the bidirectional coupling model and the correlation model to form a multi-physical field joint calculation framework, and propelling a simulation process by adopting a discrete time slicing mode; and outputting a three-dimensional dynamic simulation map including a temperature field evolution track, a smoke diffusion path and an airflow disturbance range. The system can accurately restore the fire scene multi-physics field synergistic effect process, and provides effective support for fire rescue decision and building fire protection design.

The invention discloses a constant-temperature air bath box based on a mean value coordination controller and top cover refrigeration. The constant-temperature air bath box comprises a ceramic heating sheet module, a circulating water refrigerating unit, a temperature acquisition device and a top cover semiconductor refrigerator TEC auxiliary cooling system. The temperature control system adopts proportion-integration-differentiation (PID) control based on mean value coordination, and comprises a controller for controlling the mean value tracking set value of each path of temperature measurement value and a controller for eliminating the deviation between each path of temperature measurement value and the mean value. When the TEC refrigeration sheet and the cooling fan on the top cover of the constant temperature box work, heat of upper-layer air in the constant temperature box is dissipated to the outside, the situation that the upper portion is hot and the lower portion is cold due to natural convection of air in the box is reduced, and the uniformity and the stability of the temperature are improved. According to the temperature control system, the temperature coupling effect between the heating pieces is fully considered, and the accuracy and uniformity of temperature control are improved; and meanwhile, each hot module and each cold module have certain symmetry, so that the setting difficulty of control parameters is effectively reduced.

The invention discloses a PINN-based transformer convective heat transfer coefficient acquisition method, system and device and a medium, and relates to the technical field of transformers, and the method comprises the steps: building a three-dimensional thermal field simulation model based on transformer structure parameters, obtaining temperature field data through multi-physics field coupling simulation, building a sample set, training a physical information neural network model, and obtaining the convective heat transfer coefficient of a transformer. A loss function is defined, through weight adjustment and optimization algorithm training, loss change is dynamically monitored, convective heat transfer coefficient distribution is inversed, an inversion coefficient is substituted into a thermal model for forward calculation, iterative optimization is performed through comparison with independent measurement data, and accuracy and applicability are verified through actually measured temperature data. According to the method, the dependence on experimental data is reduced, the high-precision and high-efficiency acquisition of the convective heat transfer coefficient of the spatial change of the transformer is realized, and a reliable technical means is provided for thermal design and state evaluation of the transformer.

The invention provides a cabinet three-dimensional temperature field monitoring method and device, and the method comprises the steps: arranging four temperature sensors at the positions of left and right columns at the rear part of a cabinet and the left and right middle positions of the rear side of the top of the cabinet respectively, and forming vertical and horizontal coordinate distribution points covering a key heat distribution region of the cabinet; collecting temperature data of the four temperature sensors at preset coordinate positions, and inputting the temperature data into a three-dimensional temperature field reconstruction algorithm model; processing the temperature data by adopting a bilinear interpolation method, and calculating the temperature value of any position in the cabinet; and according to a hot air convection rule, introducing height direction temperature gradient correction into the three-dimensional temperature field reconstruction algorithm model so as to eliminate the influence of heat convection on a temperature monitoring result. The three-dimensional temperature distribution in the cabinet can be accurately reflected, the temperature monitoring precision and real-time performance are improved, and the installation and maintenance cost is reduced.

The invention belongs to the technical field of simulation analysis, and particularly relates to a medium-voltage environment-friendly gas insulation switch cabinet temperature field modeling method, which comprises the following steps: constructing a three-dimensional geometric model of a switch cabinet and carrying out simplification processing; the COMSOL multi-physics field simulation software is imported; electromagnetic-thermal bidirectional coupling modeling is carried out; adding a surface-to-surface radiation physical field; determining a fluid flow state based on a Glassu number, and selecting a corresponding fluid dynamic model; environment conditions are set, and radiant heat exchange power and a convective heat exchange coefficient are calculated; establishing a grid division strategy based on temperature contribution to obtain a simulation model of preliminary modeling; solving and post-processing a solving result, and analyzing hot spot distribution by using a temperature distribution diagram; a thermocouple is installed in a hot spot area in an actual switch cabinet, actual temperature data are obtained through measurement, and the simulation model subjected to preliminary modeling is corrected according to the actual temperature data. The temperature rise condition can be accurately predicted, and a powerful guarantee is provided for safe operation of equipment.

The invention relates to the technical field of electric tracing band heating systems, in particular to an electric tracing band heating system operation control method, device and system, and the method specifically comprises the steps: analyzing the severity of the heat compensation imbalance condition of an electric tracing band caused by external severe convection and PTC characteristics, and constructing the heat compensation imbalance degree of the electric tracing band; analyzing the heat compensation lag condition of the electric tracing band to the heated body caused by the heated inertia influence, and constructing the compensation response hysteresis of the electric tracing band; temperature compensation factors are constructed by combining the two, the proportional term of the PID control system in the next control interval is obtained, power adjustment of the electric tracing band heating system is carried out, the heat compensation hysteresis of the electric tracing band heating system under the condition that the convection heat dissipation condition is unstable is reduced, and the heating efficiency of the electric tracing band heating system is improved. The defect that due to the influence of temperature response compensation lag, power output of an electric tracing band heating system is frequently adjusted, and local supercooling of a heated body is caused is overcome, and the temperature stability of the heated body is improved.

To provide a prefabrication method for a layered wall that can integrate tiles and a heat insulation layer without breakage.SOLUTION: A layered wall cantilevers a tile and a mold on both sides of a core concrete layer to form a structure which has rigidity like a core tube steel structure and also allows elastic deformation, a heat insulation layer is charged between the tile and core concrete layer and connected with a precast outer support rod to be completely cast, layer by layer, without inversion, wherein the title is not broken owing to inversion, sandwiched between the heat insulation layer with elasticity and a mold for another layered wall to be securely hardly broken during warehouse storage / transportation, and also securely hardly broken in crane assembly, the heat insulation layer is sandwiched inside to be securely hardly dropped or broken, and a wind leak and a cold bridge are evaded with the precast outer support rod. On casting the core concrete layer, operations to connect with an outer support tile layer, block the cold bridge, and block convection are completed, so that the method is simple and easy to operate.SELECTED DRAWING: Figure 1

The invention relates to the technical field of metal material heat treatment, in particular to a gradient temperature control method for a stainless steel cold rolling annealing process. Comprising the steps that an annealing furnace is divided into independent temperature control sections in the strip steel conveying direction, each temperature section is provided with an electric heating wire set, a forced convection cooling air duct and a high-precision infrared temperature measurement array, temperature data are collected in real time, and a target gradient temperature curve is generated; constructing a phase change power-temperature correlation model, and outputting a theoretical gradient temperature curve; a three-stage MPC is adopted to cooperatively control and output a control signal; and the heating power and the cooling strength are adjusted in real time according to the control signal, if the temperature fluctuation exceeds the limit, the power is compensated through a PID algorithm, the strip steel speed is adjusted, and closed-loop feedback is formed. Through multi-section independent temperature control, thickness-temperature dynamic modeling and a three-level cooperative control framework, accurate tracking of a gradient temperature curve is achieved, and the quality and efficiency of the annealing process are improved.

The invention relates to the technical field of electric control cabinets, and discloses an efficient heat dissipation frequency converter electric control cabinet which comprises a bottom plate and a heat insulation plate. In the efficient heat dissipation frequency converter electric control cabinet, a lower low-temperature area accelerates the flow speed of airflow in an air inlet pipe through rotation of a first fan, efficient heat dissipation is achieved, and a second fan in a high-temperature area and the first fan on the top supply air upwards; the natural convection characteristic of hot air rising is used for accelerating hot air discharging, air cooling is started at the low temperature, cooling plate water cooling is automatically switched at the high temperature, and the energy-saving performance and the powerful cooling requirement are both considered. When a differential pressure sensor on the filter screen monitors abnormity, a threaded rod can be driven to rotate, a brush plate moves up and down to automatically clean the filter screen, a second fan rotates reversely to blow dust and impurities away from the filter screen, a mounting frame is pushed inwards, a clamping block in a sleeve and a first circular truncated cone are unlocked, and a spring arranged on the sleeve in a sleeving mode can push the mounting frame and a mounting plate to automatically slide. When the mounting frame is pushed inwards again, the clamping block in the sleeve is automatically locked with the circular truncated cone I, so that the maintenance operation of the electric control cabinet is more convenient.

The invention relates to the technical field of quenching, in particular to a high-toughness steel wire production quenching furnace and a quenching process thereof. The quenching furnace comprises a furnace body, a heating chamber and a cooling chamber are arranged in the furnace body, a blocking mechanism is arranged between the cooling chamber and the heating chamber, a conveying mechanism is arranged in the cooling chamber, a mounting frame is arranged at the bottom of the cooling chamber, and a quenching oil tank used for storing quenching oil is arranged in the mounting frame. A stirring mechanism and a reciprocating mechanism are arranged in the quenching oil tank; oil in the quenching oil tank flows through up-down reciprocating motion of the pressing plate, temperature layering of the upper layer and the lower layer of the oil is broken, heat exchange is promoted, the temperature of the oil is more uniform, when the pressing plate reciprocates up and down and ascends, the through holes are opened, the oil in the upper layer can smoothly pass through, and when the pressing plate descends, the through holes are closed. Therefore, the speed of oil in the lower layer flowing to the upper layer in the oil tank is increased, convection of oil in the quenching oil tank is more sufficient, and the temperature difference between the upper layer and the lower layer is further reduced.

The invention belongs to the field of machine tool linear feed shaft thermal error prediction, and provides a cross-working-condition migration machine tool thermal error step-by-step prediction method and a cross-working-condition migration machine tool thermal error step-by-step prediction system. According to the technical scheme, the method comprises the following steps: acquiring thermal error data of the linear feed shaft of the machine tool under two working conditions of natural cooling and forced cooling and time-temperature distribution data of each temperature measurement point of the linear feed shaft; decoupling the thermal error data under each working condition into a linear component and a nonlinear deviation component; according to a heat conduction and convective heat transfer coupling mechanism, the inhibition effect of low-temperature water on the temperature rise of the lead screw is quantified, and a temperature rise inhibition coefficient is calculated; based on the inhibition coefficient, mapping the original temperature rise data and the nonlinear deviation component under the natural cooling working condition to an equivalent temperature rise characteristic space under the forced cooling working condition; and predicting a cross-working-condition linear component and a non-linear deviation component according to the equivalent temperature rise characteristic space, and performing superposition to obtain a thermal error prediction value of the linear feed shaft. And high-precision prediction of the thermal error of the linear feed shaft under different cooling working conditions is realized.

The invention discloses a photovoltaic-driven IDC electric-cooling linkage method and device, and belongs to the technical field of IDC electric-cooling linkage, and the method comprises the following steps: S1, constructing a gravity energy storage structure; s2, the gravity object is lifted to the highest point of the gravity object channel through the gravity energy storage structure; s3, air at the bottom of the gravity object channel is compressed for the second time, and a thermal cracking reaction is carried out; s4, thermal cracking gas generated by the thermal cracking reaction is drained, and combustion products are discharged into a gas storage chamber; s5, the generated steam waste heat pushes a turbine in a turbine chamber to do work for power generation; and S6, domestic hot water and night heating hot water are prepared, convective heat exchange is conducted, the low-temperature reclaimed water obtained after heat exchange is heated into high-temperature steam in a cooler, the high-temperature steam enters a turbine to become high-temperature reclaimed water, and the high-temperature reclaimed water flows into a control center or a water storage pool. The organic matter compressed garbage is used as a gravity object for gravity energy storage, and heavy oil, solid fuel, adsorbents and other high-value products are produced in the gravity energy storage process.

The utility model belongs to the technical field of high-temperature flow field pressure testing, and discloses a water-cooling pressure probe for measuring a turbine interstage three-dimensional dynamic high-temperature flow field, which is characterized by comprising a probe head, a support rod, a mounting seat and a lock cover. The probe head comprises a cylinder and a cylinder beveled body which share the same bottom surface, and two dynamic pressure sensors are packaged in the probe head. The diagonal plane of the cylindrical beveling body and the side face of the cylinder are each provided with a pressure sensing hole, and the pressure sensing holes are communicated with a pressure sensor. A plug board with a vortex generating device is arranged in the probe head and the support rod, so that heat convection between cooling water and the pressure measuring channel is enhanced. Three-dimensional flow parameters such as a pitch angle, a deflection angle, total pressure, static pressure and Mach number in a turbine interstage flow field can be measured through calibration of a calibration wind tunnel. Compared with an existing probe, the probe can realize flow field measurement in a high-temperature environment, prevents a sensor at the head of the probe from temperature drift and even damage due to heating, and further ensures the accuracy of measured data.

The invention provides a severe convective weather early warning method and system based on monomer identification and lightning jump, and is applied to the technical field of data processing. The method comprises the following steps: processing high-precision lightning positioning data and meteorological radar data to generate convection monomer characteristic parameter information; processing the ground observation data to generate ground meteorological element associated information; processing the convective monomer characteristic parameter information and the ground meteorological element association information to generate severe convective monomer identification result information; processing the high-precision lightning positioning data based on the strong convection monomer identification result information to generate lightning jump judgment information; and processing the severe convection monomer identification result information and the lightning jump judgment information based on the target severe convection weather early warning model to generate severe convection weather early warning result information.

The utility model discloses a heat exchange enhanced heat-work coupling elastic-thermal refrigeration device based on a topological elastic micro-channel and a system thereof, a driving SMA bed is enabled to generate phase change through heat energy, the elastic-thermal effect of an elastic-thermal SMA is induced, the length ratio of the elastic-thermal SMA to the driving SMA is set to be 1: 2, the elastic-thermal SMA bed can realize larger phase change strain, and the elastic-thermal effect of the elastic-thermal SMA bed is enhanced. The latent heat released in the phase change process is larger; the two pieces of symmetrical elastic rubber are arranged in the fluid pipeline of the SMA bed, control over the system flow can be achieved, fluid is made to fully conduct convection heat exchange with the SMA bed, and the heat exchange efficiency of the refrigerating system is improved; transfer of cold energy is achieved through heat transfer fluid, refrigerating devices are used at the same time, alternate dissipation of the cold energy and heat energy of the system is achieved through the two elastic heat SMA beds, periodic cycle work can be stably and efficiently conducted, and the working efficiency of the refrigerating system is improved.

The invention relates to the technical field of frequency converter heat dissipation, and discloses a generator set frequency converter heat dissipation structure which comprises a cabinet body, a sealing seat arranged at the top of the cabinet body, a detachable sealing cover arranged at the top of the sealing seat, a first convection window arranged at the top of the inner side wall of the cabinet body, and a second convection window arranged at the bottom of the inner side wall of the cabinet body. A detachable water-cooling heat exchanger or an air-cooling heat exchanger is arranged on the outer side wall of the cabinet body, a first convection cavity and a second convection cavity are formed in the positions, facing the outer side wall of the cabinet body, of the water-cooling heat exchanger and the air-cooling heat exchanger respectively, and the first convection window and the second convection window are communicated through the first convection cavity and the second convection cavity. Compared with the prior art, the device has the advantages that the internal heat transfer medium does not need extra power, the heat dissipation efficiency is high, contact with cooling water can be avoided, the air tightness is good, invasion of salt mist or dust is reduced, fluorinated liquid is allowed to serve as the internal heat transfer medium, and the phase change latent heat of the fluorinated liquid can be used for coping with high-temperature transient loads.

The invention discloses an in-tank convection prevention device and method. The in-tank convection prevention device comprises a storage tank body, a heat insulation module, a shielding corrugated plate, a bonding connecting strip and a convection blocking strip. According to the convection prevention method, the heat insulation module is firmly fixed by bonding the connecting strips, and a gas vertical flowing channel in a gap between the storage tank body and the heat insulation module is forcibly cut off by utilizing the transversely arranged convection blocking strips; according to the storage tank, a'thermosyphon 'closed circulation loop causing heat transfer is effectively damaged, continuous gas convection is avoided, and therefore structural damage or deformation of the storage tank body caused by local low-temperature impact is effectively prevented while the overall cold insulation performance is greatly improved and the cold loss is reduced.

The invention provides a heat and cold storage water body system based on a multi-head water distributor and a working method of the heat and cold storage water body system, and belongs to the technical field of water body heat storage. High-temperature water is stably injected into the upper layer of a water body through the suspended water distributor at the top, and low-temperature water is injected through the exposed water distributor at the middle lower part, so that mixing of cold water and hot water is reduced to the greatest extent, and stable temperature stratification is quickly formed and maintained. Therefore, the invalid mixing loss of cold and heat is obviously reduced, and the effective heat storage / cold storage capacity and the heat exchange efficiency of the water storage device are greatly improved. The floating type heat preservation top cover directly covers the water surface, upward evaporation heat dissipation and convection heat dissipation on the water surface are effectively blocked, heat loss of the water body is greatly reduced, the heat preservation performance of the system is excellent, and the energy storage efficiency is high.

The invention discloses an ultra-high voltage reactor shell convective heat transfer coefficient iterative calculation method and device, and the method comprises the steps: building a control equation of a temperature fluid field of an ultra-high voltage reactor, and building a function expression for obtaining a comprehensive convective heat transfer coefficient; the comprehensive convective heat transfer coefficient comprises a convective heat transfer coefficient under a natural convection condition and an equivalent radiation heat transfer coefficient, the comprehensive convective heat transfer coefficient is corrected step by step through multiple iterations based on a control equation of a temperature fluid field until the comprehensive convective heat transfer coefficient converges, the temperature difference between the wall surface and the external fluid is obtained, and the temperature difference between the wall surface and the external fluid is obtained. And taking the converged comprehensive convective heat transfer coefficient as a final convective heat transfer coefficient. According to the method, the equivalent radiation convective heat transfer coefficient is provided, the comprehensive convective heat transfer coefficient is obtained by combining the convective heat transfer coefficient under the natural convective heat transfer condition, and the accurate temperature difference between the wall surface and the external fluid is obtained through multiple times of iterative calculation.

The invention relates to the technical field of intelligent fan control, and provides a bidirectional convection enhanced cooling fan control method and system, and the method comprises the steps: controlling a bidirectional convection enhanced cooling fan to execute various operation modes according to each group of cooling working condition feature data, and recording corresponding cooling effect data; the heat dissipation working condition characteristics comprise equipment temperature, equipment load, environment temperature and environment humidity; the heat dissipation effect data comprises the equipment temperature reduction amplitude and the fan energy consumption in the preset time; determining an optimal operation mode corresponding to each group of heat dissipation working condition characteristic data based on the heat dissipation effect data; constructing a decision tree model based on the heat dissipation working condition feature data and the corresponding optimal operation mode; determining an optimal operation mode of the equipment under the current working condition by utilizing the decision tree model; and controlling the bidirectional convection enhanced cooling fan to operate according to the optimal operation mode under the current working condition. The matching degree of the fan operation control mode and the heat dissipation requirement is improved, and the energy consumption and the heat dissipation effect are balanced.

The invention provides a multi-physical field coupled roasted eel cooking degree prediction and real-time temperature control system and method. The system comprises a tunnel type oven, an image acquisition module, an image synchronization and fusion module, a carbonization identification module, a temperature correction module, a cooking degree prediction module, a partition temperature control adjustment module, a conveyor belt speed control module and a system controller. The system fuses hot air convection and infrared radiation to form a coupled thermal field, obtains multi-mode information of a fish body by combining visible light and infrared imaging, realizes thermal-optical field collaborative perception through image fusion, carbonization identification and temperature correction, constructs a deep cooking degree prediction model based on multi-source features, drives thermal control and dynamic adjustment of a conveying strategy, and realizes deep cooking degree prediction. The accurate evaluation of the cooked degree of the roasted eel and the active intervention of the carbonization trend are realized, and the roasting uniformity and the product consistency are obviously improved.

The present invention provides a vapor chamber structure with fins and a manufacturing process therefor. The vapor chamber structure with fins comprises a supporting plate housing, supporting columns, a liquid injection port, liquid suction cores, and a fin cover plate. The supporting columns are arranged in the supporting plate housing in an array manner; the liquid injection port is formed in the outer side of the supporting plate housing and is communicated with the interior of the supporting plate housing; the liquid suction cores surround the supporting columns and are arranged in the supporting plate housing so as to form vapor cavities used for heat exchange, and a welding layer formed for connecting the supporting plate housing and the fin cover plate is provided between adjacent vapor cavities and located on the walls of the liquid suction cores; and the top end of the fin cover plate comprises a plurality of fins arranged in an array manner, and the fin cover plate covers and is fixed to the top end of the supporting plate housing and performs convection heat exchange with the outside by means of the fins. The present invention can effectively solve the problem of too low convection heat exchange efficiency of the vapor chamber, improving the convection heat dissipation efficiency of the vapor chamber.

The invention belongs to the technical field of building refrigeration, and discloses a dynamic partition refrigeration regulation and control system based on floor height, regulation and control areas are divided in real time according to the floor height, heat flux density and the like through a dynamic density clustering partition algorithm, and the influence of high-altitude air pressure on the sensible temperature is corrected in combination with a height compensation module; an adaptation strategy is generated based on a'height-load 'bivariate model; the high-layer area fits the air convection characteristic through a linear function, and the low-layer area reflects the soil thermal buffer effect through an exponential function, so that refrigeration parameters are accurately matched with actual requirements of all floors, and overheating or insufficient refrigeration caused by traditional unified parameter regulation and control is avoided; data are collected in real time through a space-air-ground three-in-one sensing network; when the personnel density in a region is suddenly increased or functions are switched, the system can complete temporary partition merging and regulation and control parameter adjustment in a short time, and the intelligent operation and maintenance requirements of scenes such as a campus and a hospital for real-time monitoring and rapid optimization are met.

The invention relates to an environmental test box for realizing high and low temperature rapid alternating circulation, which is mainly applied to the technical field of environmental test equipment. The test box is provided with a high-temperature chamber and a low-temperature chamber which are independent from each other, a thermal insulation layer is arranged between the two chambers, and the test box can respectively keep constant temperature environments at the highest temperature of + 75 DEG C and the lowest temperature of-50 DEG C; during a test, a sample is placed in the test bed, and the rotating shaft structure driven by the motor periodically rotates in a reciprocating manner or rotates in the same direction among different temperature zones, so that high-low temperature rapid alternating circulation is realized. The operation mode of the motor is controlled through the control system so as to simulate the accelerated aging process of the component in the temperature rapid alternating environment. According to the test box, through the design of the control system, the forced convection fan and the middle thermal insulation layer, it is guaranteed that the temperature switching process is rapid, uniform and stable. Compared with the prior art, high and low temperature circulation can be completed without overall heating and cooling of the interior of the test box, and the test box has the advantages of being high in test efficiency, capable of remarkably improving the reliability and accuracy of the high and low temperature alternating circulation test of the sample and the like.