558 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 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 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 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 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 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.

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 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 LNG cold energy power generation, seawater desalination and ice making coupling system comprises a seawater cooler, a seawater heater, a seawater flash evaporator, a first refrigerant vaporizer, an LNG vaporizer, a steam turbine generator, an expansion and compression all-in-one machine, a second refrigerant heat exchanger, a seawater ice maker, an inclined plate ice-water separator and a rotary drum ice crystal washer. A low-grade heat source of an LNG receiving station is used for heating seawater for flash evaporation desalination, water vapor is condensed to produce fresh water, and a first refrigerant is heated and evaporated; the expansion and compression all-in-one machine is driven by pressure energy generated after LNG is vaporized and expanded to conduct mechanical compression work on the first refrigerant, and the operation efficiency of the first refrigerant driving steam turbine generator is improved. The vaporized low-temperature natural gas is reheated through a second refrigerant, and the work efficiency of the natural gas driven expansion and compression all-in-one machine is improved; and the second refrigerant extracts the LNG cold energy for seawater ice making, and ice slurry can be used for marine product preservation, industrial cooling, cold storage air conditioners, low-temperature refrigeration houses and fresh water supply after being separated and purified.

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 seawater desalination, in particular to an LNG freezing method seawater desalination system and process, and the LNG freezing method seawater desalination system comprises a seawater storage tank, a filter, a precooling heat exchanger, a two-phase heat exchanger, a crystallizer, a separator and a fresh water generator, the filter is used for filtering and removing impurities such as large-particle suspended solids, silt and shell fragments in seawater, the precooling heat exchanger is used for carrying out heat exchange on the filtered seawater to obtain precooled seawater, and the two-phase heat exchanger is used for carrying out direct or indirect heat exchange on the precooled seawater and LNG (Liquefied Natural Gas) to obtain low-temperature seawater; the crystallizer stirs to promote formation of ice crystals of low-temperature seawater and high-concentration low-temperature seawater, the separator separates the ice crystals from the high-concentration low-temperature seawater, and the fresh water generator melts the ice crystals based on an external heat source to generate fresh water. According to the system, cold energy released during LNG gasification is used as energy for seawater freezing crystallization, LNG cold energy is effectively utilized, energy waste is reduced, and energy consumption and cost of fresh water production are reduced.

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 discloses a composite phase change material containing a directional hierarchical pore heat conduction network and a preparation method thereof.The method comprises the steps that an aqueous solution of polyamic acid salt, an aqueous solution of graphene oxide and modified expandable graphite flakes are mixed and then subjected to directional freezing and freeze drying, and a porous network framework is prepared; sequentially carrying out imidization, thermal expansion and graphitization treatment on the porous network skeleton in an inert atmosphere to prepare a graphite-based directional hierarchical pore network skeleton; and under vacuum, dipping the graphite-based directional hierarchical pore network skeleton in the phase change material to prepare the composite phase change material containing the directional hierarchical pore heat conduction network. By modifying expandable graphite flakes to optimize dispersibility and combining ice crystal template induced assembly and a controllable expansion process, an axial ordered heat conduction network and a porous synergistic confinement structure are constructed, the heat conduction and heat storage efficiency of the material is effectively improved, capillary adsorption of multi-scale apertures is utilized, and the heat storage efficiency of the material is improved. And the leakage problem of the solid-liquid phase change material is effectively solved.

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 provides a pipeline freezing resistance prediction method and system of an automatic sprinkler system. The method comprises the following steps: in a cold environment monitoring area, capturing an ice crystal growth vibration signal through an acoustic emission sensor, and synchronously associating real-time icing rate data; inputting a multi-scale long-short-term memory network, and outputting composite freezing features through a short-time-span memory unit and a long-time-span memory unit; the transmitting power and the modulation rate of the LoRaWAN node are adjusted in a self-adaptive mode, and the high-priority composite freezing characteristics and the geographic position codes of the corresponding pipe sections are transmitted to a far-end control center; ice crystal dynamic parameters and material stress parameters in the composite freezing characteristics are matched based on a pipeline material ice expansion coefficient database, the fracture risk probability of the specific pipe section is calculated, and a pipeline electric heat tracing gradient temperature rising strategy corresponding to the fracture risk probability is activated. According to the technical scheme provided by the invention, the cracking risk of the pipeline of the automatic water-spraying fire extinguishing system in the cold environment is accurately predicted and effectively reduced.

The invention discloses a multiple circular plate type sludge dewatering machine and an operation method thereof, and relates to the technical field of sludge dewatering, the multiple circular plate type sludge dewatering machine comprises a treatment main body, a sealing cover is fixedly connected to the center of the top of the treatment main body, a feeding pipe is fixedly connected to one end, close to the sealing cover, of the top of the treatment main body, and a first motor is fixedly connected to one end of the top of the sealing cover; the output end of the first motor is fixedly connected with a gear rod, and the bottom of the gear rod is rotationally connected with the top of the treatment body. The arc-shaped plate is arranged at one end of the outer wall of the exhaust pipe, sludge can be stirred, a cavity is formed in the sludge behind the arc-shaped plate, cold air exhausted by the exhaust pipe makes full contact with the sludge, water in the sludge forms ice crystals, and the problem that in the using process of a traditional sludge dewatering machine, the sludge cannot be cooled easily is further solved. The sludge contains a large amount of water, so that the volume of the sludge is increased, the treatment burden of a dehydration device is increased, and the sludge dehydration efficiency is reduced.

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 present invention discloses a pressure transmission device for plateau permafrost pressure measurement, which relates to the technical field of pressure measurement devices. To solve the problem that when the optical fiber sensor is placed in the cable duct box, if the cable duct box is not well sealed during rain, rainwater will seep into the cable duct box, and the cladding and coating layer of the optical fiber will undergo hydrolysis reaction due to long-term contact with water, resulting in material aging or performance degradation, and water vapor will condense on the surface of the optical fiber to form tiny water droplets or ice crystals, causing light scattering or absorption loss. The cable duct box of the optical fiber pressure sensor includes a main cable duct box and a branch cable duct box, and the adjacent main cable duct boxes are connected by snap connection. A plurality of optical fiber pressure sensors are arranged inside the cable duct box of the optical fiber pressure sensor. An outer housing is arranged at the outer end of the main cable duct box, and an inner housing is arranged at the inner end of the main cable duct box. An inner connection end inside the inner housing is arranged at one end of the inner housing, and an outer connection end outside the inner housing is arranged at the other end of the inner housing. The inner connection end inside the inner housing is hermetically connected to the outer connection end outside the inner housing.

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.