739 results about "Ice crystals" patented technology

The invention belongs to the technical field of enamel glaze preparation, and particularly relates to a high-temperature-resistant compact enamel glaze preparation method, which comprises: 1, enamel frit preparation: mixing 45-65% by mass of silicon dioxide, 10-15% by mass of anhydrous borax, 5-10% by mass of sodium carbonate, 2-6% by mass of lithium carbonate, 2-6% by mass of calcium carbonate, 2-6% by mass of strontium carbonate, and 3-6% by mass of ice crystal to form a batch, melting at 1300 DEG C for 2-3 hours, carrying out water quenching to prepare an enamel material, drying, and sieving with a 200-mesh sieve to obtain enamel frit powder; step 2, preparing enamel glaze slip, namely mixing and ball-milling 40-55% of enamel frit powder, 15-30% of 316 # stainless steel powder, 5.5-10% of clay suspending agent and 25-50% of water in percentage by mass to obtain the enamel glaze slip; and step 3, enamel coating and firing. The enamel coating has excellent high temperature resistance and corrosion resistance and long service life, and the preparation process is simple in requirement, simple and convenient to operate and suitable for industrial production.

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 relates to the field of vacuum bag materials, in particular to an anti-freezing vacuum bag capable of keeping freshness of fresh food and a preparation method of the anti-freezing vacuum bag. The anti-freezing vacuum bag capable of keeping the freshness of the fresh food comprises the following raw materials: matrix resin, a solid filler, a polymerization compound additive, an antioxidant, a reinforcing agent, a toughening agent and the like. The vacuum bag material not only has good mechanical properties, but also can keep good strength stability in a low-temperature use environment, the probability of embrittlement, damage, softening and mechanical property reduction is greatly reduced, meanwhile, the barrier property of the vacuum bag material to molecules such as moisture and oxygen can be guaranteed, and the service life of the vacuum bag material is prolonged. The vacuum bag has excellent environmental moisture and temperature resistance in the long-term use process, the effective ice crystal resisting effect is achieved, the performance requirements of existing consumers for high-performance vacuum fresh-keeping materials are fully met, and very excellent application prospects are achieved.

The invention belongs to the technical field of artificial influence weather, and discloses an artificial rain and snow enhancement effect evaluation method based on a layer-by-layer iteration mode, and the method comprises the steps: determining a catalyst diffusion track and an affected region through employing a high-resolution numerical mode, the airplane observation data comprises the background ice crystal number concentration of the affected area and the ice crystal number concentration under the condition that the catalyst is used; reading the ice crystal number concentration of the sowing layer from the observation data, and calculating the correlation between the L0 ice crystal number concentration of the sowing layer and the L1 radar reflectivity factor of the first layer; calculating correlation coefficients of radar reflectivity factors between every two adjacent layers from the sowing layer to the ground layer by layer; a high-resolution numerical mode is adopted to simulate diffusion of a catalyst, the ice crystal number concentration of an affected area in airplane observation data is read and substituted into the relational expression, radar reflectivity factors of all layers are calculated layer by layer in an iterative mode, and the precipitation rate is calculated according to the radar reflectivity factors of all layers; and calculating the rainfall rate under the background ice crystal number concentration, comparing, and quantitatively evaluating the artificial rain and snow increasing effect.

The invention provides a collagen freeze-dried product and a preparation method thereof, and belongs to the technical field of biology. In the formula design, through the synergistic effect of the arginine (salt) and the surfactant, denaturation and aggregation of the collagen freeze-dried product in the production process and the storage period are inhibited, the stability of the product is improved, and the prepared collagen freeze-dried product is high in activity, purity and safety. In the freeze-drying process, pre-freezing parameters are optimized, and the nucleation effect of ice crystals in the freezing process of the collagen mixed solution is controlled by regulating and controlling parameters such as temperature and vacuum degree in the freeze-drying process, so that the shapes and the sizes of the crystals in the collagen freeze-dried product are more uniform, the drying time is shortened, and the production efficiency is improved. And the collagen freeze-dried product with uniform pore diameter and excellent appearance is obtained, and the uniformity and stability of batch and inter-batch products are improved.

The invention belongs to the technical field of flight test photoelectric testing, and particularly relates to a cloud particle parameter measuring device and method based on digital holographic imaging. The device comprises a device pneumatic shell (100), a signal transmitting end arm (300), a signal receiving end arm (200), a measuring module and a data processing module, the device pneumatic shell (100) is integrally provided with a columnar pneumatic appearance, the signal transmitting end arm (300) and the signal receiving end arm (200) are arranged at the same end of the device pneumatic shell in parallel, and the opposite sides of the signal transmitting end arm (300) and the signal receiving end arm (200) are provided with a transparent transmitting light window (301) and a transparent receiving light window (201) respectively. The measuring module is arranged in the pneumatic shell of the device, the measuring module generates an emission light beam, the emission light beam is emitted through the signal emission end arm and then received through the signal receiving end arm to form holographic image information, and the holographic image information is transmitted to the data processing module; and the data processing module analyzes the image and calculates to obtain a particle median volume diameter MVD and an atmosphere liquid water content LWC. Accurate measurement of geometric quantities such as three-dimensional morphology, particle size distribution and the like, motion quantities such as three-dimensional speed, rotation characteristics and the like, and statistical quantity information such as median volume diameter (median volume diameter), liquid water content (liquid water content) and the like of ice crystal / water drop particles in multi-scale complex-form cloud can be realized; and autonomous control of the core test equipment for the icing flight test of the aircraft is realized.

The invention discloses cheese ice cream capable of being frozen and preserved and a preparation method thereof, and the preparation method comprises the following steps: filtering raw milk, standardizing the milk, sterilizing, fermenting and removing whey to obtain cheese curd; placing the cheese curd in a steam engine for treatment to obtain a pretreated cheese material; preparing a mixed material from the pretreated cheese material, milk powder, cane sugar, glucose powder, malt syrup, a compound stabilizer, water, cream cheese, condensed milk, iced yolk and cream; and performing sterilization, ultrasonic homogenization and aging on the mixture, and performing freezing treatment under the condition that an alternating static magnetic field and an alternating electric field are alternated during stirring and air inflation, thereby obtaining the product. By adding the compound stabilizer, the cheese ice cream is more stable in structure and easy to maintain taste; ice crystals are fine and uniform in texture under the combined action of the alternating magnetic field and the electric field, so that the soft and glutinous feeling and aftertaste effect of the ice cream 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 invention relates to a preparation method of alumina porous ceramic for an electrostatic chuck, which successfully obtains porous ceramic with uniform pore structure, adjustable porosity and aperture, small density and high strength by optimizing technological parameters such as freeze drying and taking ice crystals generated by water as a template. Aluminum oxide powder, a plasticizer, a dispersing agent, a binder, a defoaming agent, a thickening agent and the like are adopted as main raw materials, the formula of the slurry is adjusted, and the flowability, formability and stability of the slurry are improved. In addition, by doping the sintering aid, the porous ceramic also has good dielectric strength and compressive strength. The method not only can provide excellent thermal management performance, but also is simple in process, wide in raw material source, low in cost and environment-friendly, and provides a high-performance porous ceramic material with potential application potential for electrostatic chucks and the like.

The invention is suitable for the technical field of quick-frozen vegetable sorting, and particularly relates to a quick-frozen vegetable sorting method and device.The method comprises the steps that initial optical data and initial dielectric spectrum data of quick-frozen vegetables are obtained, space-time alignment and compression are conducted on the initial optical data and the initial dielectric spectrum data, and the initial optical data and the initial dielectric spectrum data are obtained; obtaining first optical data and first dielectric spectrum data; based on the first dielectric spectrum data, performing ice crystal repair on the first optical data to obtain second optical data; wherein the ice crystal repairing is used for eliminating the influence of ice crystal interference on optical data; determining the defect probability of the quick-frozen vegetables based on the first dielectric spectrum data and the second optical data; and sorting the quick-frozen vegetables according to the defect probability. According to the method, the problem of image distortion caused by ice crystal interference is solved, defect detection with higher precision is realized, the sorting precision of the quick-frozen vegetables is remarkably improved, and the misjudgment rate and the missed judgment rate are reduced.

The invention discloses a quantitative analysis method for an artificial rain and snow enhancement effect based on fine calculation of an influence zone, which comprises the following steps: acquiring the influence zone in an artificial spreading catalyst diffusion zone according to artificial ice crystal concentration or silver iodide concentration; carrying out extraction and qualitative analysis on the radar products in the influence area; performing space-time matching on the influence area and the radar product, and calculating a mean value and distribution of radar parameters in the influence area; performing spatial distribution and time sequence change analysis on the radar parameters, and calculating parameter change and change rate of the radar product in the influence area; and quantitatively analyzing the parameter change and the change rate, and giving a rainfall enhancement operation effect. The method not only can improve the precision of quantitative analysis of the artificial rain and snow enhancement effect based on fine calculation of the influence area, but also has good interpretability, and can be directly applied to a quantitative analysis system of the artificial rain and snow enhancement effect.

The invention relates to the technical field of frozen soil collection, and discloses a plateau frozen soil sample collection device which comprises a mounting table, a sampling outer cylinder is arranged below the mounting table, a heating cavity is formed in the sampling outer cylinder, and electric heating rods are fixedly mounted on the two sides of the top of the sampling outer cylinder; and the heating end of the electric heating rod extends into the heating cavity. When frozen soil is collected and sampled through rotation of the sampling outer cylinder and the sampling inner cylinder, an anti-freezing solution in the heating cavity can be heated through the electric heating rod, and heat is dissipated to the outside through the sampling outer cylinder, so that ice crystals in the frozen soil outside the sampling outer cylinder are melted, and the sampling cylinder can quickly penetrate through a frozen soil layer; and meanwhile, the anti-freezing solution in the water storage tank is circularly pumped into the cooling cavity in the sampling inner barrel to cool the sampling inner barrel, so that the situation that heat is generated due to friction between the sampling inner barrel and the sampled frozen soil is reduced, the original state of the frozen soil sample can be kept, and the sampling accuracy is ensured.

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.

The invention discloses a food freezing system based on electrode coupling and a multi-stage electric field and a freezing method thereof. The system comprises an electric field generating device (1), a refrigeration house (2), a space plate type discharge electrode (3), a metal frame discharge electrode (4) and the like. According to the freezing method, a discharge electrode is used for being coupled with an electric field, a special'superposed electric field effect 'is generated, the freezing efficiency is remarkably improved, heat conduction inside and on the surface of food can be accelerated, uniform and rapid crystallization of water is promoted, large ice crystals are effectively prevented from being formed, and therefore damage to cell structures is reduced. Compared with a traditional freezing method, the freezing time can be shortened by 15%-30%, and the juice loss rate is reduced by 3%-6%. Due to the synergistic effect of the double electric fields in different stages, the food can be quickly frozen under lower voltage, and the comprehensive energy consumption can be reduced by 15-30% while the safety is ensured. The method is suitable for large-scale food freezing application, and remarkable technical progress and economic benefits can be brought to the food freezing industry.

The invention relates to the technical field of constant-temperature control, in particular to a constant-temperature quick-cooling control method for 0.5-degree outlet water without freezing and containing low-temperature secondary refrigerants. The constant-temperature quick-cooling control method comprises the following steps that S1, the real-time outlet water temperature, target temperature and environment temperature sampling are obtained, and the difference between the target temperature and the real-time outlet water temperature is analyzed; and dividing three temperature control stages for the 0.5 DEG C effluent cooling condition according to the difference, and marking the corresponding section as a target cooling stage to obtain a temperature control stage identifier. According to the invention, through the real-time monitoring and the subdivision management of the temperature control stage, the response speed and accuracy of temperature adjustment are improved, the current temperature change can be reflected in real time, the future adjustment demand can be analyzed and predicted through the prospective temperature trend, the adjustment is more timely, and the adjustment efficiency is improved. The staged temperature management allows precise temperature regulation and control according to the actual cooling requirements, and especially effectively prevents ice crystals from being generated in the rapid cooling process.

The invention discloses a vehicle-mounted defrosting and demisting intelligent control system and method for zoning dynamic adjustment, and relates to the technical field of vehicle-mounted control, and the method comprises the steps: initializing and activating a dual-camera visual sensor array, an infrared temperature field detection device, a pipeline pressure sensor, a vehicle cabin temperature and humidity sensor and a zoning air port execution mechanism; the method comprises the following steps of: performing multi-modal fusion processing on visible light images and infrared temperature data of the double cameras, obtaining characteristic indexes of moisture condensation and ice crystals on the surface of partitioned glass, generating continuous and adjustable total wind speed signals, dynamically distributing the total wind speed signals in a normalized manner according to a preset distribution index, obtaining partitioned wind speed signals, constructing a time sequence prediction model, and predicting the wind speed of the partitioned glass according to the time sequence prediction model. And the atomization risk score is output, a thermal field compensation coefficient is generated through mapping, the thermal field compensation coefficient is issued to a partition air opening executing mechanism, and partition defrosting and demisting are completed. The defrosting and demisting precision, the energy utilization rate and the response speed are remarkably improved by recognizing the frosting and dewing states of the partitions, optimizing the energy efficiency through wind speed distribution and conducting thermal field pre-compensation.

The invention discloses a preparation method of an intelligent anti-icing material, which comprises the following steps: preparing a humidity response precursor of the intelligent anti-icing material by using quaternized chitosan and E44 epoxy resin as raw materials, and mixing a PDMS prepolymer A, porous SiO2 nanoparticles and silicone oil to prepare an oil storage functional precursor of the intelligent anti-icing material; mixing the intelligent anti-icing material humidity response precursor and the intelligent anti-icing material oil storage functional precursor, adding an amine curing agent T31, a PDMS curing agent B and a cross-linking agent, and performing cross-linking curing to obtain the intelligent anti-icing material. When the intelligent anti-icing material is sprayed on the power transmission line, continuity of liquid on the surface of the power transmission line can be destroyed, spreading of ice on the surface of the power transmission line can be inhibited, ice nucleation sites are greatly reduced, ice crystal nucleation is inhibited, release and recovery of a lubricating layer are controlled by utilizing humidity sensitivity of the intelligent anti-icing material, and in the freezing and thawing cycle, the anti-icing effect is good. The service life of the lubricating layer is prolonged, and the intelligent anti-icing effect under the complex environment change is achieved.

The present disclosure relates generally to a beverage nucleator system that can initiate ice crystal nucleation by application of a directed flow of pressurized gas to the exterior of the fluid container containing a supercooled beverage. More specifically, the present disclosure relates to a beverage nucleator system for a supercooled beverage container which may include a frame having a beverage container aperture for receiving a beverage container therein and a gas outlet positioned within the beverage container aperture for directing a flow of pressurized gas at a beverage container received therein.

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 the technical field of geological sampling, and particularly discloses a Qinghai-Tibet Plateau winter frozen soil sampler which comprises a coring pipe, an ultrasonic vibration unit, a cooling assembly, a supporting frame and a prestress mechanism. A vacuum cavity is formed in the side wall of the coring pipe; the ultrasonic vibration unit is installed at the top end of the coring pipe, the cooling assembly is installed on the ultrasonic vibration unit, and the coring pipe, the ultrasonic vibration unit and the cooling assembly are all installed on the supporting frame. The prestress mechanism is arranged between the ultrasonic vibration unit and the supporting frame and used for maintaining the axial stability of the coring pipe. Through cooperation of the cooling assembly and the vacuum cavity, the coring pipe can be always kept in a low-temperature state, and the situation that the original state of frozen soil is damaged due to ice crystal melting caused by friction heating in the sampling process is avoided; high-frequency vibration of the coring pipe is achieved through the ultrasonic vibration unit to replace traditional mechanical extrusion, damage to the soil structure can be greatly reduced, and the accuracy of frozen soil sampling is guaranteed.

The invention provides a dense high ice cloud detection method and system based on water vapor and ice crystal absorption characteristics, and the method comprises the steps: obtaining water vapor absorption spectrum band detection data, ice crystal absorption spectrum band detection data and atmospheric window region spectrum band detection data according to remote sensing image data of a meteorological satellite for a target region; calculating an ice vapor index according to the water vapor absorption spectrum detection data and the ice crystal absorption spectrum detection data; calculating a cloud vapor index according to the water vapor absorption spectrum band detection data and the atmospheric window area spectrum band detection data; and according to the ice steam index and the cloud steam index, calculating a dense high ice cloud index to identify whether the dense high ice cloud exists in the target area. According to the method, the detection and enhancement of the dense high ice cloud are realized by using the water vapor absorption spectrum detection data, the ice crystal absorption spectrum detection data and the atmospheric window region spectrum detection data, and compared with the prior art, misjudgment and interference are reduced, and the recognition accuracy of the dense high ice cloud is improved, so that weather forecast is more accurate.

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 heat transfer rate control method and device for a graphene liquid drop printing three-dimensional prefabricated body, the heat transfer rate control method is realized by adopting a graphene liquid drop printing three-dimensional prefabricated body device, and the device comprises a printing substrate, a metal enclosing wall, a liftable freezing substrate and a temperature controller, the heat transfer rate control method comprises the steps that the process of printing a three-dimensional prefabricated body is divided into three stages including a low layer, a middle layer and a high layer in sequence according to the number of printing layers, the number of the layers is set to be n1, n2 and n3, and in the layer-by-layer printing process, the temperature of a liftable freezing base plate, the temperature of a metal enclosure and the height of the liftable freezing base plate in each stage are controlled, the control of the ice crystal growth heat transfer rate in the process of printing the three-dimensional preform is realized, and the stability of the ice crystal growth rate is ensured, so that the three-dimensional connected graphene material with uniform axial microstructure and excellent performance is prepared.

The invention discloses magnetic control low-temperature freeze-drying equipment applied to agricultural product processing, and relates to the technical field of low-temperature freeze-drying processing equipment.The magnetic control low-temperature freeze-drying equipment comprises an intelligent magnetic field monitoring device, a freeze-drying cooling device, an intelligent heating device, a vacuumizing device and a controller; the intelligent magnetic field monitoring device is used for carrying out magnetic field intensity control and detection on the rapidly cooled food, the freeze-drying cooling device is arranged outside the freeze-drying cavity and is used for refrigerating and cooling the freeze-drying cavity, the intelligent heating device is used for heating and sublimating frozen agricultural products, and the vacuumizing device is used for carrying out vacuumizing treatment on the freeze-drying cavity; the intelligent magnetic field monitoring device comprises a plurality of magnetic field rings with the same axial magnetic field intensity, a magnetic control power controller and a magnetic field intensity monitor; the magnetic control power controller is used for controlling the magnetic field intensity of the magnetic field ring group; the size of ice crystals in the food in the freeze-drying process is regulated and controlled through the magnetic field, so that preparation is made for the later sublimation stage, and it is guaranteed that energy consumption and nutrient loss are minimum in the sublimation process.

The invention discloses an airspeed tube with deicing and drainage functions. The airspeed tube is composed of main parts such as a fusiform drainage opening, a waterproof deicing plate, an adapter flange, a protective sleeve and a mounting seat. The front end of the airspeed tube adopts a pointed-cone-shaped streamline design, so that airflow fluctuation and turbulence can be reduced, and the flight energy consumption is reduced. And the gas diversion trenches are arranged around, so that water drops or ice crystals can be prevented from adhering, and the measurement precision is improved. The total pressure port is located at the foremost end of the fusiform drainage port and can make contact with stable airflow, and measurement reliability is guaranteed; the static pressure openings are formed in the radial side edge of the fusiform drainage opening, and redundant design is provided for the multiple static pressure openings. And the waterproof deicing plate is provided with a deicing heating wire and a miniature water outlet and is used for heating, deicing and draining water. The total pressure pipeline and the static pressure pipeline filter melt water through a waterproof breathable film, and the melt water is prevented from entering the rear-end pressure pipeline. The heating wire and the deicing heating wire wound outside the total pressure conduit and the static pressure conduit form a series loop to improve the cooling efficiency. The design of the total pressure pagoda joint and the static pressure pagoda joint with different lengths at the tail saves the structural space and is convenient to install and maintain. While light-weight and small-size development is met, the functions of low-power-consumption intelligent deicing and drainage after deicing are achieved at the same time.

The invention discloses a rapid food preservation control method based on a flash freezing technology, and relates to the technical field of food preservation, and the method comprises the following steps: obtaining first data of food, and spraying a nano coating containing antifreeze proteins with different concentrations on the surface of the food; inputting the first data into a pre-trained neural network model to obtain second data; according to the second data, a refrigerant injection device and a pulse electric field excitation device are synchronously started, food dynamic data are obtained, feature extraction and trend prediction are conducted on the food dynamic data, and the food dynamic data comprise the real-time core temperature and the ice crystal formation dynamic state; according to the prediction result, the refrigerant flow rate and the electric field frequency are dynamically adjusted, and the release rate of antifreeze protein in the nano-coating is synchronously adjusted; according to the method, the refrigerant flow rate, the electric field frequency and the antifreeze protein release rate are accurately and synchronously adjusted, so that the problems of non-uniform freezing, overlarge ice crystals and food quality deterioration in a traditional freezing method are effectively solved, and the food freezing fineness and the fresh-keeping effect are 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 provides a preparation method and application of a brain tissue rapid frozen section. The preparation method comprises the following steps: (1) embedding a pretreated frozen tissue sample into a pre-cooled OCT (Optical Coherence Tomography) for freeze drying; (2) transferring the freeze-dried tissue sample in the step (1) into an embedding box containing a pre-cooled OCT (Optical Coherence Tomography), and completely immersing the tissue sample into the OCT; (3) putting the embedding box in the step (2) into an embedding container containing precooled refrigerating fluid and dry ice; and immersing the embedding box into a refrigerating fluid, performing quick freezing, and slicing after quick freezing to obtain the brain tissue quick freezing section. The preparation method is short in time consumption, generation of ice crystals is remarkably reduced, the phenomenon of slice falling caused by bubbles in the embedding blocks in slices is effectively prevented, tissue frost cracking is avoided, and the slice quality is improved.