436 results about "Ice crystals" patented technology

The invention relates to an ice crystal evaporator and an ice crystal water cooling device producing from the same, belonging to the technical field of refrigeration. The ice crystal evaporator is characterized in that a liquid inlet channel is formed by an evaporator tube, a liquid inlet and a liquid outlet in a tubular casing; and the outer channel of the evaporator tube of the tubular casing is divided into more than one S-shaped channel forming a water return channel through a water inlet of a water divider and a water outlet of a water collector. The ice crystal water cooling device is characterized in that the return air inlet of the ice crystal evaporator is communicated with a compressor, a condenser, a liquid feeding valve, a dry filter, a liquid feeding electromagnetic valve anda thermostatic expansion valve in sequence, and then is communicated with the liquid inlet of the ice crystal evaporator; a cooling water inlet / outlet of the condenser is connected with a cooling tower in series; and a water inlet / outlet of the ice crystal evaporator is communicated with a water circulating pump and an ice crystal energy storage tank in series. The invention has the advantages ofhigh cooling efficiency, no icing and low cooling temperature and is suitable for production of energy storage central air-conditioning, marine fishing, seafood processing, fruit, vegetable or meat processing, and the like; the cooled medium is municipal water.

The invention belongs to the technical field of polymer preparation, and particularly relates to a curved-surface polyaniline modified 3D printing polyurethane material and application thereof. According to the preparation method, an ice crystal hard template method and a polyether glycol soft template method are combined, so that the microstructure of polyaniline is adjusted, and the curved polyaniline with regular morphology is prepared. The curved-surface arc-shaped structure has a large specific surface area, can form more contact sites with resin when being directly melt-blended with the resin, is beneficial to construction of a conductive path, and is not easy to agglomerate due to the curved-surface structure. The polyaniline with the arc-shaped structure is of a three-dimensional space structure and is directly blended with the resin to form a randomly arranged conductive network structure, so that the composite material is not easy to break when being impacted, and can be better embedded between the resin to form a stress transfer channel, and a complex three-dimensional network structure is constructed; the mechanical property and the antistatic capability of the product are improved.

The invention discloses a layered pore structure geopolymer based on combination of multi-stage low-temperature in-situ polymerization and an ice template method and a preparation method of the layered pore structure geopolymer. The preparation method comprises the following steps: preparing geopolymer slurry; performing one-way freezing on the slurry to form a frozen green body containing a directionally arranged ice crystal template; before the frozen green body is subjected to freeze drying to remove an ice crystal template, specific multi-stage low-temperature in-situ polymerization treatment is carried out, and the treatment comprises at least two different low-temperature heat preservation stages which are sequentially carried out within the temperature range of-10 DEG C to + 5 DEG C, and the temperature of the low-temperature heat preservation stages is gradually increased; and then the treated green body is subjected to freeze drying and maintenance. According to the method, the multi-stage low-temperature in-situ polymerization step aiming at the reaction characteristics of the geopolymer is introduced before the ice crystal template is removed, so that the problems of low mechanical property and unstable pore structure of the geopolymer prepared by a traditional ice template method are solved, and the mechanical strength and structural integrity of the product are remarkably improved; meanwhile, a good layered pore structure and pore channel connectivity are kept.

The utility model discloses a backflow type icing wind tunnel capable of simulating a sand-containing ice crystal-containing environment, which belongs to the technical field of wind tunnels and comprises a wind tunnel body, a liquid particulate matter injection system, a solid particulate matter injection system, a phase change particulate matter injection system, a temperature control system, a pressure control system and a plurality of power systems. The wind tunnel body is sequentially provided with a stable section, a contraction section, a test section, a first expansion section and a second expansion section, and the liquid particulate matter injection system and the solid particulate matter injection system are both installed on the stable section. According to the backflow type icing wind tunnel capable of simulating the sand-containing and ice-crystal-containing environment, the content of sand and dust, the content of ice crystals and the content of liquid water in the wind tunnel body can be adjusted, and the temperature in the wind tunnel body can be adjusted, so that more complex weather can be simulated in the wind tunnel body, the accuracy of experimental data is ensured, and the experimental efficiency is improved. Therefore, the reliability and the safety of the aircraft in an extreme environment are improved, and the test efficiency is improved.

According to the mixed phase ice crystal particle ground generation and icing experiment device and method, a water spray head generates a water drop particle swarm, an ice crystal particle generation device generates an ice crystal particle swarm, the water drop particle swarm and the ice crystal particle swarm are mixed in a controllable proportion to form an ice-water mixed phase, and then a mixed phase icing experiment can be achieved. The experimental device comprises an air duct system, a water drop atomization generation system, an ice crystal particle generation system, an impact surface system and a measurement system, the air duct system comprises an axial flow fan, an air duct and an experiment cavity; the impact surface system comprises an impact surface assembly, the water drop atomization generation system and the ice crystal particle generation system are used for providing water drops and ice crystals respectively, the axial flow fan provides high-speed airflow, the water drops and the ice crystals are conveyed through the air duct to impact the impact surface assembly at a high speed, and an impact icing experiment of a mixed phase is achieved; the measuring system is used for measuring the air speed, temperature and humidity in the air duct and measuring the thickness and temperature of an ice layer of the impact surface assembly.

The invention relates to a large-size glass product with a natural ice crystal imitating effect and an industrial casting method of the large-size glass product. The product is a lead-free glass casting with the weight larger than or equal to 100 kg, dendritic crystal-shaped or snowflake-shaped devitrified phases which are formed by growing calcium fluoride as crystal nucleuses and are distributed randomly are arranged in the product, and the three-dimensional aesthetic effect imitating natural ice crystals is achieved. The method comprises the following steps: mixing lead-free glass particles with a calcium fluoride nucleating agent with a specific particle size, and filling a mixture into a special mold with a three-layer composite structure and a temperature monitoring function; and executing a four-stage programmed thermal regulation including melting homogenization, nucleation cooling, isothermal crystallization and super-slow multi-step annealing, wherein the melting and heat preservation time and the maximum thickness of the product meet the quantitative relation of t = k.H. Through systematic collaboration of materials, molds and processes, the technical problems that crystallization in large-size glass is not uniform and cracking is easily caused by thermal stress are solved, high yield and stable mass production of products of 500 kg or above are achieved, and the method is suitable for the fields of high-end buildings, art devices and decoration.

The invention discloses a high-strength microneedle with directional holes for biological analysis sampling and a preparation method of the high-strength microneedle, and belongs to the technical field of microneedles, the method comprises the following steps: filling a silk fibroin solution into a microneedle mold to form a microneedle preform, the microneedle preform comprising a needle body part and a backing part; performing directional freezing on the microneedle preform to enable ice crystals to directionally grow in the direction from the backing part to the needle body part, and demolding to obtain a frozen blank; the frozen blank is placed in an organic solution of a cross-linking agent, soaked at the low temperature lower than 0 DEG C for ice template low-temperature solvent exchange-cross-linking treatment, taken out and cleaned, then soaked in a salt solution for salting-out treatment strengthening, taken out and cleaned and freeze-dried, and the high-strength microneedle with the directional holes is obtained. The microneedle prepared through the method has high strength and excellent puncture performance, and the skin interstitial fluid collection speed and efficiency are greatly improved.

The invention discloses a biological material supercooling storage system and a working method thereof. The biological material supercooling storage system comprises a sample carrier for storing and placing a biological material; the sample cavity is used for providing a subcooled storage environment of-30 to-5 DEG C for the biological material; the temperature control module is used for providing a controllable cooling rate for the interior of the refrigeration module, the cooling rate is greater than 2 DEG C / min in a temperature interval of above 5 DEG C, the cooling rate is 1-2 DEG C / min in a temperature interval of 0-5 DEG C, and the cooling rate is less than 1 DEG C / min in a temperature interval of below 0 DEG C; the electromagnetic excitation module is used for generating a low-frequency to very high-frequency 50Hz-300MHz electromagnetic field in the sample, and inhibiting the formation and growth of ice crystals in the sample by using the non-thermal effect of the electromagnetic field; the cooperative control module is used for achieving cooperative control over the cooling rate, the supercooling temperature and the electromagnetic field intensity so as to maintain long-term storage of the samples in a liquid state at the supercooling temperature, the storage temperature of the biological materials is reduced, meanwhile, the biological materials are not frozen, and liquid-state storage of the biological materials with different sources and different sizes at the low temperature can be achieved.

The invention relates to the technical field of aircraft electric heating deicing, in particular to a pulse heating aircraft deicing method and system.The method comprises the following steps that the ice layer thickness, the ice layer type, the airspeed and the attack angle of each aircraft surface area are collected, the inherent pneumatic sensitivity coefficient of each area is called, the aerodynamic penalty index of each area is established, and the aerodynamic penalty index of each area is calculated; and according to the values of the aerodynamic penalty indexes of the areas, performing descending order arrangement to generate a deicing area priority sequence. Through multi-parameter joint evaluation of the ice layer thickness, the ice layer type, the airspeed and the incidence angle, the heating resource distribution sequence is optimized, energy waste is avoided, in the local heating execution stage, temperature change slope real-time monitoring is adopted to replace fixed time control, the actual thermal response behavior of the ice layer can be dynamically responded, and the real-time thermal response performance of the ice layer is improved. The initial phase change process of the ice crystal is identified through a phase change starting slope threshold value, and then a medium-power pulse control mode is switched, so that a steady-state regulation heating path is formed, and the phase change control continuity is strengthened.

The invention relates to the technical field of wind tunnel tests, and discloses a wind tunnel test device and method for ice crystal test and temperature sensor test, and the device comprises a backflow type wind tunnel which comprises a first test section, a second test section, a power section, a rectification section and a temperature control section. The head end of the second test section is communicated with the tail end of the first test section, test equipment for ice crystal test is arranged in the second test section, an air inlet of the power section is communicated with the tail end of the second test section and used for increasing the airflow velocity in a wind tunnel, and an inlet of the rectification section is communicated with an air outlet of the axial flow fan and used for eliminating distortion and turbulence in airflow. An outlet of the rectification section is communicated with the head end of the first test section, a part used for generating ice crystals in the ice crystal test equipment is connected with one side of the rectification section, and the temperature control section is arranged on a pipeline between the second test section and the power section in series and used for controlling the temperature of airflow in the backflow type wind tunnel.

The invention relates to the related field of food freezing, in particular to a high-frequency alternating electromagnetic field assisted low-temperature saline solution spraying and freezing device and method, and the device comprises a continuous conveyor, a first single-mode resonant cavity, a first spraying system, a second spraying system, a second single-mode resonant cavity, a third spraying system and the like. According to the method, food is treated by adopting a two-section high-frequency alternating electric field, the first section is pretreatment for adjusting a water molecule structure in the food to facilitate heat transfer freezing, and the second section is a latent heat release stage of a maximum ice crystal band to accelerate ice crystal nucleation in the food, so that the size of ice crystals generated in the freezing process of aquatic products is reduced, and the freezing efficiency of the aquatic products is improved. The texture level, the taste and the water holding rate of the aquatic products are improved, and the freezing storage time of the aquatic products is effectively prolonged.

The invention discloses an ordered layered pore geopolymer based on heterogeneous mold strong gradient bidirectional freezing and a preparation method of the ordered layered pore geopolymer. The preparation method comprises the following steps: preparing a geopolymer slurry; the method comprises the following steps: forming an ordered layered ice crystal template by adopting graded heat conduction and strong gradient bidirectional freezing based on a heterogeneous material mold: injecting geopolymer slurry into the heterogeneous material mold, performing bidirectional freezing on the geopolymer slurry, inducing the orderly arranged layered ice crystal template, and obtaining a frozen blank containing the layered ice crystal template; performing freeze drying treatment; and maintaining to obtain the ordered layered pore geopolymer. A stable and uniform lateral temperature gradient is actively constructed in a heterogeneous mold, so that the ice crystal template with a long-range ordered layered structure is prepared, multi-stage low-temperature in-situ polymerization treatment is introduced into a frozen blank in a preferable scheme, a geopolymer matrix is reinforced in situ on the premise that the template is not damaged, and the preparation method is simple and easy to implement. And high-fidelity curing of the fine template structure is realized.

The invention relates to the technical field of freeze-drying control, and discloses a freeze-drying control method and system based on dynamic parameter regulation and control and heat and mass transfer simulation. The method comprises the steps that a multi-point temperature sensor collects temperature gradient and mass change rate data; a chaos butterfly effect algorithm identifies a nonlinear transition point and predicts an ice crystal growth trend; evaluating the heat conductivity coefficient of the material, and dividing kernel, middle and surface regions; designing a differentiated cooling curve; and cooperative control instructions of the refrigeration compressor unit, the vacuum pump unit and the heating plate array are generated, and multi-stage cooperative control is achieved. The problems of uneven ice crystal distribution and material structure damage caused by extensive temperature control in a traditional building material freeze-drying process are solved.

The invention discloses an ice crystal field uniformity measuring device and method, and belongs to the technical field of ice crystal tests. The problem that in the prior art, the uniformity and stability effects of an ice crystal field are poor is solved. According to the technical scheme, the ice crystal field uniformity measuring device is calibrated; the side face of a frame of the ice crystal field uniformity measuring device is tightly attached to one side of the test section area, an external weighing sensor is used for measuring the mass of collecting bags on the two sides of the tested ice crystal nozzles, and the effective covering diameter of the single tested ice crystal nozzle is solved through drawing; according to the axial distance of the tested ice crystal nozzles, the width X of the ice crystal field test area and the height Y of the ice crystal field test area, the tested ice crystal nozzles are arranged, and ice crystal distribution of the test section area is guaranteed. The device is used for measuring the effective coverage diameter of the ice crystal jetted by the single ice crystal nozzle in the test area and the uniformity of the ice crystal field, the arrangement mode and the arrangement distance of the ice crystal nozzles can be adjusted according to the effective coverage diameter of the single ice crystal nozzle, and the coverage area of the ice crystal field in the test area is increased.

The invention discloses a freeze-dried donkey milk powder quality control method and system based on digital twinning, and relates to the technical field of data twinning. Temperature, pressure, moisture content characterization, surface spectrum and visual information of donkey milk in the freeze-drying process are obtained through a multi-mode sensor, and are input into a digital twinning engine after edge preprocessing; and a virtual freeze-drying process is constructed in real time in combination with a heat and mass transfer model and a physical property database. A data assimilation algorithm is used for carrying out inversion estimation on key states which cannot be directly measured, such as the deep water content, the ice crystal interface position and the filming risk, and the heating rate, the vacuum level and the secondary drying time are dynamically optimized based on a predictive control strategy, so that closed-loop control of the whole process is realized. The system is further provided with a confidence evaluation module, an abnormal rollback module and a post-batch self-learning module, and online correction is performed on model deviation and continuous optimization is performed on a control strategy. According to the invention, the consistency between batches of products can be improved, and intelligent and high-quality production of the freeze-dried donkey milk powder is realized.

The invention relates to the technical field of freeze dryer control, and discloses an automatic control method and system for a constant-temperature bottle hanging type freeze dryer. The method comprises the following steps: acquiring multi-dimensional parameter data such as temperature gradient, vacuum degree fluctuation and material ice crystal form in the freeze dryer, performing real-time synchronous calibration through a multi-source data fusion engine, and generating an environment state matrix; and constructing a freeze-drying stage dynamic division model based on the matrix, accurately identifying the switching critical points of the pre-freezing stage, the primary drying stage and the secondary drying stage, and outputting and activating a corresponding temperature control strategy and a vacuum adjustment strategy according to the model. The temperature control strategy comprises a gradient cooling curve and a heating rate constraint, and the vacuum adjustment strategy comprises a pressure threshold sequence and a leakage compensation mechanism. The deviation between the ice crystal form of the material and the preset template is monitored through the closed-loop feedback unit, control strategy execution parameters are dynamically corrected, refined intelligent control over the freeze-drying process is achieved, and the stability of a freeze-dried product is guaranteed.

The utility model relates to energy equipment technical field discloses a kind of dynamic ice systems of ice blocking prevention and maintaining outlet temperature, including ice storage tank, ice storage tank inner wall is sequentially fixedly connected with ice slurry conveying branch pipe, stirring rod, semi-permeable membrane from top to bottom, the top of the ice slurry conveying branch pipe is fixedly connected with multiple ice slurry conveying spout, ice storage tank one side inside is fixedly connected with gas pipe, the one end of gas pipe is fixedly connected with air pump, air pump is located the outer side wall of ice storage tank, air pump outer wall is fixedly connected with air suction pipe and transmission shaft, the one side electric connection of air pump has monitoring line one, the one end electric connection of monitoring line one has monitoring device.In the utility model, ice crystal and water are completely separated by semi-permeable membrane, fine ice crystals entering the inlet of subcooling plate exchanger can be filtered out during ice storage, ice blocking in the plate exchanger is avoided, ice crystal filter is saved, the size of dynamic ice maker can be reduced, and the effects of preventing ice blocking and maintaining outlet temperature are achieved.

This utility model relates to the technical field of anti-clogging devices and discloses an anti-clogging device for the drain outlet of an air source heat pump. The device includes a drain pipe with a connecting circular frame on its exterior. The inner top and bottom walls of the connecting circular frame are equipped with limiting components that engage with the outside of the drain pipe. A filter plate is installed on the inner wall of the connecting circular frame. This anti-clogging device for the air source heat pump drain outlet, by incorporating a cleaning component and using a 1-mesh stainless steel filter plate, effectively traps tiny impurities such as dust particles and algae spores, preventing foreign objects from entering the drain pipe and causing blockage at the source. A miniature waterproof servo motor drives a second rotating shaft to rotate, which in turn drives a second bevel gear to rotate, causing a cleaning brush to rotate and scrape away dirt and ice crystals adhering to the filter plate surface in real time. This prevents the mesh from becoming clogged due to the accumulation of impurities, significantly improving the reliability of the anti-clogging device, enhancing its practicality, and making it easier for users to operate.

The invention provides a transparent ice block preparation control method and a refrigerator, and the method comprises the steps: responding to an ice making instruction, and controlling an ice making device to execute an ice making process; obtaining the temperature of a water body in an ice-making box in the ice-making device in the ice-making process; when the temperature of the water body enters the phase change temperature interval, a heater is controlled to execute a pulse heating control program, so that transparent ice blocks are obtained; wherein the pulse heating control program comprises the steps of executing pulse heating operation in at least two different phase change temperature sub-intervals in the phase change temperature interval, and controlling the heater to operate in a mode of repeatedly executing heating pulses for multiple times for the phase change temperature sub-intervals. According to the method, heating pulses are repeatedly executed for multiple times in a phase change temperature interval of water, the growth speed and direction of ice crystals are actively intervened, an overflow path is created for dissolved gas, the problem of ice block white turbidity is solved, and high-transparency ice blocks are prepared.

The invention provides a freezing sampling machine. The freezing sampling machine is used for preparing frozen samples and comprises a rack (1); the first lifting mechanism (2) is arranged on the rack (1) and comprises a lifting seat (3) capable of ascending and descending relative to the rack (1), and a mounting position is arranged on the lifting seat (3); the sample preparation device (4) comprises a sealed chamber (5) and a sample preparation mechanism (6), the sealed chamber (5) is located on a movement path of a sample, the sample preparation mechanism (6) is located in the sealed chamber (5), the sample preparation mechanism (6) comprises a sample preparation disc (7), and the sample preparation angle of the sample preparation disc (7) is adjustable; and the freezing container (15) is arranged below the sample preparation device (4) and is positioned on the movement path of the sample. According to the freezing sampling machine, samples can be flexibly prepared according to needs, sample ice crystal thickness meeting the needs is easily generated, the preparation efficiency is high, and the sample preparation quality is high.

The invention discloses a preparation method of anisotropic glass fiber aerogel. The preparation method comprises the following steps: preparing a glass fiber dispersion liquid; preparing an aluminum dihydrogen phosphate solution; preparing a polyvinyl alcohol solution; uniformly mixing the three solutions, pouring the mixed solution into a customized mold, freezing until the mixed solution is completely solidified, and then freeze-drying to obtain the glass fiber aerogel. The aerogel is influenced by a plurality of temperature gradients, ice crystals vertically grow along the temperature gradients to form sheet layers, different cold surfaces interact to cause the ice crystals to grow along a plane from the radial direction to the center of the square mold, and finally an array radiation structure composed of four cones is formed. The glass fiber aerogel prepared through the synergistic cooperation of a freezing casting technology and aluminum dihydrogen phosphate has anisotropy and highly-ordered lamellae, so that the glass fiber aerogel shows good low heat-conducting property.

The present application relates to a kind of in situ low-temperature confined carbonization construction carbon dot enrichment coating layer manganese-based positive electrode material and its preparation method, by accurately coordinating the evolution condition of carbon point carbon source in the mixing system environment of coating process, freezing condition and sublimation and carbonization, realize the whole process synergistic control of carbon point carbon source spatial distribution, ice crystal template state, skeleton construction of controlled conversion of carbon point carbon source and harmful residue removal on the surface of manganese-based positive electrode material, successfully constructed the carbon dot enrichment coating layer of size controllable, density adjustable, ion permeability good and interface combination firm on the surface of manganese-based positive electrode material, to realize the synergistic promotion of manganese-based positive electrode material cycle performance, rate performance and interface stability.

The invention relates to the technical field of fire-fighting management and control, and particularly discloses a water level detection and fire-fighting identification method and system based on automatic control, and the method comprises the steps: obtaining the temperature and acoustic multi-modal data of a fire-fighting pipe network, building a pipeline temperature gradient model, and predicting the temperature distribution of each section through combining the environment and the medium temperature; and extracting ice crystal nucleation and fluid anomaly characteristics at low temperature. Based on the temperature gradient, the acoustic spectrum, the water level fluctuation rate and historical data, a multi-parameter fusion congelation risk assessment model is constructed, and risk indexes are calculated and graded; constructing a congelation risk and firelight early warning linkage control strategy, and adaptively adjusting a firelight detector threshold value and a sampling frequency according to a risk level; when the risk reaches an early warning value, partitioned heating is implemented, a temperature recovery curve and water level stability are collected in real time as feedback, model iterative optimization and closed-loop control are achieved, early warning accuracy is improved, energy consumption is reduced, and reliable operation of a fire fighting system is guaranteed.

The utility model relates to a layered distribution vacuum freeze dryer, the working principle of the freeze dryer is mainly based on three steps of pre-freezing, sublimation and analysis, a pre-freezing bin receives cold air of a refrigerating main machine of a refrigerating machine through a bin main body to quickly freeze a to-be-dried substance at low temperature to form solid ice crystals, and a layered drying pipe can depend on a vacuum device, so that the drying efficiency is improved. A vacuum environment is formed in an inner cavity of the layered drying pipe, under the vacuum environment and the temperature monitoring of a temperature sensor, a heater enables a heating wire to conduct heating, ice crystals directly sublimate into water vapor instead of passing through a liquid state, the temperature in the layered drying pipe is further increased, and a small amount of water combined on the surface of a substance is removed; the layered drying pipe adopts a step-by-step vacuumizing mode, so that the defect that the traditional vacuum freeze drying equipment is relatively high in energy consumption is overcome.

The invention discloses a frozen sand mold multi-mode additive and subtractive material in-situ composite manufacturing method, and belongs to the technical field of additive and subtractive material composite manufacturing. According to the method, on the basis of the water-ice phase change reversible characteristic of the frozen sand mold, a mixture of a sand mold material and water is frozen at low temperature to form an ice crystal network framework, precise material reduction machining is conducted on the frozen sand mold through five-axis numerical control equipment, and laser cladding, magnetic field oriented deposition and hot pressing sintering multi-mode material increase technologies are combined; and in-situ additive forming is achieved on the surface of the cavity after material reduction. By regulating and controlling the temperature gradient or the magnetic field intensity, a middle combination or three-dimensional interlocking structure of the material adding layer and the ice sand base body is achieved, finally sand materials are recycled through the gradient unfreezing and separating technology, and the material utilization rate is increased. The precision limitation of traditional sand mold casting is broken through, the manufacturing cost is reduced compared with a traditional additive and subtractive process, and the method is particularly suitable for the precision manufacturing field of aerospace complex inner runner components, new energy automobile integrated castings and the like.

The invention discloses a silk fibroin freeze-dried powder preparation process for improving specific surface area and porosity, and belongs to the technical field of biological materials, and the silk fibroin freeze-dried powder preparation process comprises the following steps: firstly, adding tert-butyl alcohol into a purified silk fibroin aqueous solution as a pore-foaming agent and a cosolvent to obtain a mixed solution; treating the mixed solution by adopting a multi-stage programmed freezing scheme which sequentially comprises three stages of slow precooling to construct a macroscopic ice crystal skeleton, constant-temperature annealing to realize crystal curing and rapid deep cooling to lock microcosmic ice crystals, so as to form a frozen sample with a graded ice crystal structure; and finally, removing water and tert-butyl alcohol through vacuum freeze drying to obtain a target product. The silk fibroin freeze-dried powder with a macroporous-microporous hierarchical porous structure can be controllably prepared through the synergistic effect of tert-butyl alcohol induction and programmed freezing, and compared with the prior art, the obtained product has ultrahigh porosity, remarkably increased specific surface area and uniform pore diameter.

This invention discloses a quantitative method and apparatus for assessing the catalytic potential of silver iodide in artificial rain and snow enhancement based on cloud physics parameters, belonging to the field of atmospheric science and technology. The method includes: calculating and normalizing the total nucleation ratio of silver iodide particles to obtain a normalized nucleation conversion rate score; calculating the ice crystal potential ratio and supersaturation relaxation timescale that can effectively participate in the bergiron process after catalysis; calculating and normalizing the effective conversion time based on the ice crystal potential ratio and supersaturation relaxation timescale to obtain a normalized conversion rate score; calculating and normalizing the effective liquid water pathway to obtain a normalized liquid water content score; and weighted summing the normalized nucleation conversion rate score, normalized conversion rate score, and normalized liquid water content score to obtain a comprehensive catalytic potential score characterizing the quantitative results of the catalytic potential. This invention enables the quantitative assessment of the catalytic potential of cold clouds.

The present application provides a method for extracting ingredients of a material to be extracted in a refrigerator and the refrigerator, wherein the method for extracting ingredients of a material to be extracted in a refrigerator comprises obtaining extraction information of the material to be extracted; controlling liquid in cells of the material to be extracted to freeze to a first state; and controlling the liquid in the cells of the material to be extracted to heat to a second state to make the ingredients of the material to be extracted separate from the broken cells. When freezing to the first state, the liquid in the cells forms ice crystals, which causes the cells to expand and break. When heating to the second state, the ice crystals in the cells melt, and the effective ingredients of the material to be extracted separate from the broken cells. Since the refrigerator has a heating function, it solves the problem of slow melting of the material to be extracted. Since the refrigerator can accurately control the freezing and melting states, it solves the problems of difficult end-point control of melting and food spoilage.

The application relates to an immersion refrigeration temperature control system, and relates to the technical field of immersion refrigeration temperature control. The system realizes temperature control during the immersion refrigeration process, reduces the formation of large ice crystals in the refrigeration process, reduces the damage to the inside of food, reduces energy consumption and reduces costs. The system comprises a temperature acquisition module, a liquid pump driving module, an upper computer, a data transmission module, a control module and a refrigeration equipment control module; the upper computer and the control module realize data interaction through the data transmission module; the temperature acquisition module collects the temperature of a refrigeration object and an external environment, converts the collected temperature signals into electric signals and sends the electric signals to the control module; the control module controls the power of the liquid pump driving module according to the temperature signals of the refrigeration object and the influence value of the external environment on the refrigeration liquid through a cascade control strategy and a PID control algorithm; and the control module also controls the start and stop of the refrigeration equipment control module according to the real-time temperature of the refrigeration object. The application is suitable for the field of immersion refrigeration temperature control.

This application provides a refrigerator. The refrigerator includes a housing provided with at least one magnetic field preservation chamber, a magnetic field generating device for generating a magnetic field within the storage space of the magnetic field preservation chamber, and a cooling system for cooling the magnetic field preservation chamber. The magnetic field generating device is configured to set the magnetic field strength inside the storage space in the range of 10 gauss to 100 gauss, and the cooling system is configured to set the temperature inside the storage space in the range of -10°C to 0°C, or the magnetic field generating device is configured to set the magnetic field strength inside the storage space in the range of 5 gauss to 40 gauss, and the cooling system is configured to set the temperature inside the storage space in the range of -30°C to -15°C. This makes it possible to refrigerate food at sub-zero temperatures, or to reduce the formation of large ice crystals inside when freezing food, thereby improving preservation effectiveness.