169 results about "Freezing methods" patented technology

The invention belongs to the technical field of cell cryopreservation, and relates to a cryopreservation method based on ultrasonic ice planting. In the method, the nucleation temperature of ice planting is less than-9 DEG C, and the cooling rate from nucleation to icing is less than 5 DEG C / min. Compared with the prior art, the method has the advantages that the time required for cryopreservation of the cells is remarkably shortened, meanwhile, damage to the cells caused by ice crystals generated in the cooling process is reduced, and the problem that an existing cell cryopreservation cooling method cannot meet the nucleation and freezing uniformity of a cell solution in the cooling process is solved.

The squid liquid nitrogen instant freezer comprises a freezing chamber, the freezing chamber is provided with a conveying belt assembly, the conveying belt assembly is provided with a plurality of arc-shaped protrusions at equal intervals, and a plurality of material turning rod assemblies are installed on the side face, close to the freezing chamber, of a sliding plate; the driving motor drives the conveying belt assembly to move to convey squids to the position below the nitrogen injection assembly, meanwhile, due to the fact that arc-shaped protrusions arranged on the conveying belt assembly enable the squids and the surface of the conveying belt to be spaced and not to make close contact, and the driving motor can synchronously drive a reciprocating lead screw to rotate in the conveying process; and after squids are conveyed in place, the first gear column is separated from a driving gear, and the squids are not conveyed any more, so that the squids are statically located below the nitrogen injection assembly for air injection quick freezing, the contact time of the squids and nitrogen is prolonged, and the quick freezing effect of the squids is guaranteed.

The invention relates to the technical field of deep underground space stratum reinforcement, in particular to a CO2 transcritical freezing system and method.The CO2 transcritical freezing system comprises a freezing subsystem which comprises a first liquid inlet pipe and a first liquid return pipe which are arranged above a stratum and used for conveying low-temperature liquid CO2 to the stratum to conduct stratum freezing construction; the liquefaction subsystem is used for compressing the volume of the normal-temperature gaseous CO2, so that the movement of molecules in the gaseous CO2 is limited and reduced, and the gaseous CO2 is converted into low-temperature liquid CO2; and an inlet and return pipeline subsystem. The CO2 medium adopted by the invention effectively solves the problems of flammability, explosiveness, high risk, difficulty in treatment, environmental pollution and the like caused by liquid ammonia and saline water utilized in the traditional freezing construction; and a water-bearing layer, a soft stratum and the like are frozen and reinforced through compressed and converted low-temperature liquid CO2, a water-resisting layer and a temporary support are formed, seepage of water and sinking, displacement and collapse of the wall face and the bottom plate are effectively prevented, and the stability of the frozen area to be excavated 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 provides an anchor-plate-injection collaborative supporting method for active water sealing. The anchor-plate-injection collaborative supporting method is applied to various laneways penetrating through water-containing stratums, especially to construction of vertical shafts constructed through a freezing method. During freezing method construction, a freezing wall is formed firstly, a section height is excavated, an anchor rod is drilled and constructed after the section height is excavated, and if water exists after excavation, forced drainage needs to be carried out to enable the displacement to be larger than the water inflow so as to ensure that no accumulated water exists on a working face; the steel plates are fixed through anchor rods, so that grouting gaps are formed between the steel plates and the well wall; a gap between the bottom edge of the steel plate and the well side is blocked by a certain height through foam; grout is injected through a grouting pipe on the lower portion of the steel plate, and a primary supporting structure is formed after solidification; secondary and more supporting can be carried out immediately or after primary supporting of multiple section heights is formed, and a permanent supporting structure is formed. A traditional passive waterproof mode is broken through, and active water plugging can be achieved; the method adapts to various construction methods and stratums; the temporary support is essentially different from a traditional anchor-shotcrete net temporary support, and the construction efficiency is higher.

The invention provides a contact channel freezing method micro-reinforcement construction method and a control mechanism thereof.The construction method comprises the steps that S1, freezing pipes are arranged and installed, specifically, the freezing pipes are arranged around a contact channel according to a design scheme, it is ensured that the freezing pipes can uniformly cover a construction area, and the freezing pipes are installed and fixed; s2, a freezing liquid injection and freezing process: injecting a freezing liquid through a freezing pipe to gradually freeze the surrounding soil body to form a freezing wall, and meanwhile, monitoring the thickness and strength of the freezing wall in real time to ensure the freezing effect; s3, micro-reinforcement treatment is conducted, specifically, after the frozen wall is formed, a micro-reinforcement technology is used for conducting precise reinforcement on micro cracks and soft areas in the frozen wall; and S4, freezing wall melting and subsequent construction: after construction of the connection channel is completed, injection of the freezing liquid is stopped step by step, so that the freezing wall is gradually melted, and subsequent construction and ending work are carried out. According to the invention, the accuracy and safety of the construction process are ensured.

The present invention is directed to a method for combining dehydrofreezing and medium to far spectrum infrared radiation to preserve biological material. IR transfers energy and penetrates food products, thereby removing naturally present moisture. The present invention provides a novel method of combining pH treatment, infrared radiation, freezing, and vacuum-sealing for preserving biological material. Biological materials are preserved through either a pH treatment or with heat to remove harmful pathogens, followed by processing using far spectrum infrared radiation which may be powered by either gas or electric means. The processed materials undergo a freezing process which may be done using Individual Quick Freezing or blast freezing methods The frozen processed material is then packaged via vacuum sealing.

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 provides a cryopreservation and resuscitation method for induced differentiation of pluripotent stem cells to metaphase cells and application, and the cryopreservation method comprises the following steps: (1) the initial cells are pluripotent stem cells, and are induced and differentiated to the metaphase; (2) recovering the cells by using a mild digestive enzyme, counting, and resuspending the cells in a cryopreservation solution; and (3) carrying out programmed cooling to-80 DEG C, and then transferring into liquid nitrogen for preservation for later use. According to the cryopreservation method and the cryopreservation liquid provided by the invention, the cryopreservation survival rate of the differentiated metaphase cells is obviously improved, apoptosis or irreversible stress injury induced by a traditional cryopreservation liquid is avoided, and the problems of large cell injury and low survival rate caused by using a general cryopreservation liquid in the prior art are obviously improved. The resuscitated cells keep good differentiation potential, can smoothly form a mature renal unit structure, and solves the problem of subsequent differentiation failure in the prior art.

The invention relates to a freezing method foundation pit anti-permeation isolation system which comprises a plurality of freezing pipes inserted into a soil body near a foundation pit and distributed in an arch shape, a saline water main pipe sequentially connected with the freezing pipes and freezing stations connected to the two ends of the saline water main pipe. A lead screw, a nut lifting plate matched with the lead screw and a partition plate for guiding the nut lifting plate are arranged in a pipe body of the freezing pipe, the nut lifting plate divides the pipe body of the freezing pipe into an upper cavity and a lower cavity which are not communicated with each other, and a liquid inlet and a liquid outlet which are communicated with the brine main pipe are formed in the top of the pipe body of the freezing pipe; a heating plate is arranged in the partition plate; low-temperature saline water in the freezing station enters an upper cavity of the freezing pipe through the saline water main pipe to freeze a soil body, and anti-permeation isolation is carried out; the driving motor drives the lead screw to rotate, the lead screw drives the nut lifting plate to move up and down in the pipe body of the freezing pipe, the height of the upper cavity is adjusted, and freezing of stratums of different depths is achieved. And the heating plate is used for heating the low-temperature saline water in the freezing pipe and unfreezing the soil body.

The invention discloses a power transmission line snow removing and anti-freezing system, which comprises an intelligent monitoring subsystem, a data analysis and decision subsystem, a snow removing and anti-freezing execution subsystem and an energy supply subsystem, and is characterized in that the intelligent monitoring subsystem comprises a multi-parameter sensor network module which specifically comprises a temperature sensor, a humidity sensor, a weight sensor and an image sensor; the data acquisition and transmission module specifically adopts a microcontroller as a core and is responsible for collecting data acquired by each sensor; according to the scheme, the problems of low efficiency and complex operation of a traditional anti-freezing method are effectively solved, and all-weather intelligent protection of key infrastructures such as electric power and communication can be realized. The system not only improves the safety and reliability of facilities, but also has the advantages of energy conservation and environmental protection.

The invention discloses a freezing design method for an inclined shaft freezing crossing strong permeable pebble bed, and particularly relates to the technical field of freezing method construction. Acquiring rock and soil parameters and regional historical environment temperature of a pebble bed of a crossing section of the target inclined shaft; establishing a three-dimensional inclined shaft geometric model, and determining the arrangement position, inclination angle and spacing of the freezing pipe along the axis of the inclined shaft; constructing a frozen region space model coupled with the pebble bed; the method comprises the following steps: constructing a freezing-heat transfer-seepage multi-field coupling model according to historical environment temperature and freezing pipe arrangement information, performing numerical simulation on a frozen body forming process, and obtaining an evolution function of a freezing boundary expansion range and a freezing thickness at different times; according to the method, multi-physical field coupling modeling and freezing body evolution accurate control of the freezing process can be achieved, and the method has the advantages of being high in predictability, uniform in freezing effect and the like and is particularly suitable for inclined shaft freezing design and construction under complex geological conditions.

The invention relates to the technical field of shaft construction structures, and discloses a freezing method shaft sinking shaft water intercepting device which comprises an annular device shell, a through opening is formed in the middle of the inner side of the annular device shell, welding columns are evenly distributed on the inner side face of the annular device shell, and lifting rings are installed at the upper ends of the welding columns. A plurality of sets of hydraulic supporting structures are evenly installed in the annular device shell outwards, and a hydraulic oil cylinder is horizontally fixed in the annular device shell. According to the freezing method shaft sinking shaft water intercepting device, an air pump is used for inflating the annular water intercepting air bag through the air guide pipe, so that the annular water intercepting air bag begins to expand after being inflated and becomes an annular ring body, and an expansion telescopic part obviously expands outwards till the annular periphery abuts against the shaft wall; the sealing ring is fully attached to the wall of the shaft to form annular sealing, the sealing effect is good, and when leaking water of the shaft flows downwards along the wall of the shaft, the leaking water is blocked by the annular water intercepting air bag in time.

The invention discloses a fluid-solid coupling rock mechanics test device for simulating freezing method construction borehole wall stability, which comprises an experiment box body, a freezing pipe is vertically arranged in the middle in the experiment box body, the interior of the freezing pipe is used as a construction area, and a geotechnical material is filled in an area outside the freezing pipe in the experiment box body to serve as a water-bearing layer. The top of the freezing pipe is connected with the refrigerating system, one side of the experiment box is provided with the tide simulation device, the water supply system is connected with the experiment box and the tide simulation device, and the monitoring system is connected with the experiment box. The device can simulate the tide seepage state and monitor the stability of the well wall in real time, can provide more accurate mechanical parameters for freezing method construction on the basis of the fluid-solid coupling rock mechanics principle, and improves the reliability and efficiency of engineering design.

A pipe freezing device is disclosed that facilitates the use of a pipe freezing method which changes the temperature of the ocean. The pipe freezing device comprises a liquid nitrogen component which is applied to at least one pipe. Thus, the liquid nitrogen component is used to make the temperature of the pipes just below freezing, thereby causing the water flowing through the pipes to become colder.

The application provides a freezing and recovery method and application of pluripotent stem cell induced differentiation middle stage cells, and the freezing method comprises the following steps: (1) the starting cells are pluripotent stem cells, which are induced to the middle stage; (2) the cells are recovered and counted by using a mild digestion enzyme, and the cells are resuspended in a freezing solution; (3) after programmed cooling to-80 DEG C, the cells are transferred into liquid nitrogen for storage, and are ready for use. The freezing method and the freezing solution provided by the application significantly improve the freezing survival rate of the differentiation middle stage cells, avoid the apoptosis or irreversible stress damage induced by the traditional freezing solution, and obviously improve the problems of cell damage and low survival rate caused by the general freezing solution in the prior art. The differentiation potential of the recovered cells is good, and the cells can successfully form mature kidney unit structures, so that the problem of subsequent differentiation failure in the prior art is solved.

The invention discloses a cryopreservation method and application of an NK cell cryopreservation solution, and belongs to the technical field of cell cryopreservation. The NK cell cryopreservation solution comprises DMSO, a PBS buffer solution and a hydroxyethyl starch solution; the volume fraction of the DMSO in the NK cell freezing medium is 2.8 to 3.2 percent; the cryopreservation method of the NK cell cryopreservation liquid comprises the following steps: culturing activated NK cells by using a complete culture medium added with IL-15 and IL-18, centrifuging, cleaning, preparing the NK cell cryopreservation liquid, re-suspending to a preset cell concentration by using the NK cell cryopreservation liquid, cooling, freezing, and preserving in liquid nitrogen. The NK cell cryopreservation liquid used in the invention is a universal NK cell cryopreservation liquid, and the cryopreservation method provided by the invention has a good cryopreservation effect and can be used instantly.

The present invention discloses a method for mining coal by freezing through a wind oxidation zone, comprising the following steps: S01: detecting a wind oxidation zone area in a coal seam; S02: drilling a plurality of freezing boreholes, insulation boreholes and pressure relief boreholes from a tunnel to the wind oxidation zone area; S03: arranging a freezing liquid supply device, a liquid supply pipe, a liquid return pipe, a liquid supply pump and a reflux pump in the tunnel, and installing a freezing pipe in each freezing borehole; S04: supplying freezing liquid to the freezing pipe by using the freezing liquid supply device to freeze the wind oxidation zone area; S05: stopping supplying freezing liquid and recovering the freezing liquid in the freezing pipe; S06: installing an insulation pipe in each insulation borehole; S07: mining the wind oxidation zone area at a coal mining working face, and recovering the insulation pipe ahead of the coal mining working face. The present invention provides a new method for mining a coal seam with a wind oxidation zone by pre-freezing the wind oxidation zone area and then mining the wind oxidation zone area.

The invention relates to the technical field of fish meat freezing and fresh-keeping, in particular to refrigerating fluid capable of remarkably improving the fish meat freezing quality. The refrigerating fluid is prepared from the following components in percentage by mass: 10 to 15 percent of ethanol, 1 to 3 percent of chitosan, 1.0 to 2.5 percent of rhizoma polygoni cuspidati extract, 0.05 to 0.15 percent of spearmint extract, 2 to 5 percent of malic acid and the balance of deionized water. The freezing method is dipping freezing, the fish meat is dipped in a pre-cooled freezing liquid and then is subjected to cryopreservation, and the freezing temperature is-18 DEG C to-38 DEG C. The preparation method of the refrigerating fluid comprises the following steps: adding the chitosan into the malic acid and the deionized water, and uniformly stirring to obtain a solution A; sequentially adding ethanol and spearmint extract into the solution A, and stirring; and adding the polygonum cuspidatum extract, stirring and homogenizing. According to the freezing liquid, the freezing rate of fish meat can be remarkably increased, mechanical damage to muscle fibers caused by repeated formation of ice crystals is greatly reduced, the influence of temperature fluctuation on the quality of the fish meat is reduced, and the influence of freezing on the quality of the fish meat is reduced to the maximum extent.

The utility model provides a freezing pipe fixing device for freezing method construction. The freezing pipe fixing device for freezing method construction comprises an L-shaped supporting plate, a fixing rod is fixedly installed at the top of the L-shaped supporting plate, a supporting plate is fixedly installed at the top of the fixing rod, a lower clamping plate is fixedly installed at the top of the L-shaped supporting plate, and a buffering mechanism is fixedly installed in the lower clamping plate. A screw rod is rotatably mounted in the fixing rod, one end of the screw rod extends out of the supporting plate and is fixedly provided with a rotating button cover, second connecting rods are slidably mounted on the outer side of the screw rod, and upper clamping plates are fixedly mounted on the sides, away from each other, of the second connecting rods; a buffer pad is fixedly installed on the side, close to the lower clamping plate, of the upper clamping plate. The freezing pipe fixing device for freezing method construction has the advantages of being convenient to use, capable of fixing pipelines of different sizes and capable of reducing vibration of the freezing pipe.

The application discloses a kind of along empty roadway short working face coal seam floor high pressure water freezing outburst prevention control method, belong to coal underground mining floor water inrush prevention technical field, comprising the following steps: S1: determine the process parameters of freezing method, and the high pressure water of coal seam floor is detected;S2: first mining area is arranged;S3: excavate freezing chamber and install freezing equipment;S4: construction extends to aquifer freezing borehole;S5: install freezing pipeline and carry out freezing operation;S6: floor high pressure water is pumped out;S7: hydrologic observation borehole is constructed in along empty roadway floor;S8: first working face is mined and excavates second working face recovery roadway;S9: excavate second working face freezing chamber and construction freezing borehole;S10: freezing equipment completes relocation operation before first working face stop mining;S11: repeat S5 to S10 step realizes mining area working face safe mining.The application has the advantages that: it is favorable to improve the production efficiency of mine, and the safety of production is guaranteed.

The invention belongs to the technical field of nuclear power plant pipeline freezing, and discloses a multi-jacket liquid nitrogen ice plug freezing method for nuclear power plant pipeline maintenance, the configuration parameters of ice plug jackets are determined according to pipeline parameters, and the jackets are arranged in a series connection or parallel connection mode to realize freezing; the total length recommendation value of the jackets is obtained according to the pipe diameter checking standard, after the total length is determined, the number of the jackets and the length of gaps are calculated, the gaps are distributed, and when the parallel ice plug jacket mode is adopted, the length of the jackets of all branches is determined according to the branch pipe diameter checking standard by adding the branches, and the number and the pipe diameter of the branches are configured. The freezing time of the ice plug is shortened, meanwhile, the size of the closed ice plug is increased, the freezing efficiency is improved, and energy conservation and efficiency improvement are achieved.

The invention discloses a magnetic field auxiliary circulating liquid microcrystal freezing system which comprises a refrigerator body, a magnetic field generator is arranged in the refrigerator body, the magnetic field generator is connected with a transformer through an external control port, the magnetic field generator comprises two symmetrically-arranged coils, and a freezing liquid groove is formed between the two coils. A sample tank is placed in the refrigerating fluid tank, refrigerating fluid is contained in the refrigerating fluid tank, the refrigerating fluid tank is connected with an electric self-priming diaphragm pump through a refrigerating fluid circulating pipe and a silica gel hose, and thermocouple temperature measuring equipment is arranged beside the magnetic field generator. According to the invention, the sample is accurately regulated and controlled to enter a supercooled metastable state, and uniform and fine ice crystals can be formed in the food sample in combination with uniform alternating magnetic field auxiliary crystallization generated by the symmetrical coil, so that the mechanical damage of the ice crystals to food cells is greatly reduced.

The invention discloses an electric energy meter data freezing method and an electric energy meter data freezing system for decentralized freezing based on a special data container. The method comprises the following steps of: copying data of all freezing data types required in the special data container from one type of cache to the special data container at the freezing moment; querying a freezing type demand at the current moment, and setting a corresponding bit in the bitmap according to the freezing type demand at the current moment; sequentially querying the bitmap according to bits in a set period, if the bits are set, extracting corresponding frozen data from the special data container according to the frozen data type required by the freezing type corresponding to the bits, writing the corresponding frozen data into the nonvolatile memory, and resetting the bits; after the Nth set period, stopping bitmap query, clearing the bitmap, and waiting for the next freezing moment; n is the number of defined freezing types, and the set period time * N is smaller than the minimum freezing period. According to the method, system jamming caused by writing a large amount of frozen data into the nonvolatile memory at the freezing moment can be avoided.

The utility model discloses a freezing method drilling and pressing test integrated device capable of automatically releasing pressure. The freezing method drilling and pressing test integrated device comprises an orifice pipe, an automatic pressure release valve, a gate valve, a drill rod and a pressing device, the other end of the orifice pipe is connected with the gate valve; the automatic pressure release valve is communicated with the orifice pipe; one end, far away from the orifice pipe, of the gate valve is inserted into the drill rod; the pressing device is connected with the gate valve and used for sealing the gate valve and the drill rod. According to the utility model, the valve is arranged on the gate valve, so that the pressurizing pump and the pressurizing pipe can be connected through the valve for pressurizing; and automatic pressure relief is achieved by arranging an automatic pressure relief valve, and harm caused by too large pressure intensity is prevented. And the drilling rod penetrates through the gate valve and then penetrates into the orifice pipe to achieve drilling, the device only needs one-time installation, drilling and pressing tests are taken into consideration at the same time, the number of installation and construction steps is reduced, and the construction workload is reduced. And the device can quickly complete operation, the construction cost is saved, and smooth and safe construction is ensured.

The invention relates to an evaporator anti-freezing method and device, an outdoor unit, air conditioning equipment and a storage medium. The method comprises the steps that an outdoor unit calculates a first evaporator parameter of an evaporator in an indoor unit by detecting a first compressor parameter and a first condenser parameter of a compressor, and whether the evaporator is frosted or not is judged according to the change condition of the first evaporator parameter within a first preset duration; if it is judged that the evaporator is frosted based on the calculated first evaporator parameter, a compressor is controlled to operate in an anti-freezing mode in a frequency reduction mode, the outdoor unit can judge the frosting state of the evaporator without communicating with the indoor unit, and an anti-freezing mechanism is started; therefore, the problem of how to prevent the evaporator from frosting and freezing under the condition that the indoor unit and the outdoor unit do not communicate with each other is solved.

The invention discloses a compound antifreeze agent and a preparation method thereof as well as a freezing method of meat products, and belongs to the technical field of refrigeration refrigerants. Collagen peptide with a freeze-thaw protection effect is adopted, and glutathione and sodium erythorbate are compounded, so that the freeze-thaw protection effect is improved; the prepared safe and green compound antifreeze agent is applied to freezing and cold storage of meat products, the generation of ice crystals and the size of the ice crystals are reduced in the freezing process, and the activity of metalloproteinase is inhibited in the melting process of the meat products, so that degradation of collagen is reduced, cell rupture and liquid loss are reduced, and the quality of the meat products is improved. The texture, weight and color of the product are furthest maintained, and the eating quality is improved.

The invention discloses a construction method for reinforcing a soil body through a tunnel connection channel freezing method, and relates to the technical field of tunnel construction.When the construction method is used, in a preset construction area corresponding to a connection channel, drilling construction operation is conducted on a geologic body corresponding to the connection channel, a freezing pipe is installed, and the freezing pipe communicates with a freezing system; freezing operation is conducted on a preset construction area by communicating a freezing system with a freezing pipe, a frozen soil curtain is obtained, excavation and supporting operation is conducted in the frozen soil curtain according to preset construction data, a connection channel is formed, freezing holes are blocked, thaw collapse grouting is conducted on the frozen soil curtain in the connection channel, and the frozen soil curtain is constructed. According to the method, the preset construction area is frozen in real time in the construction process, so that the construction period can be shortened, meanwhile, due to the fact that the preset construction area is frozen in real time in the construction process, the risks of soil collapse and water gushing can be reduced, and the construction safety is improved when the method is used.

The invention relates to the technical field of coal mine shaft construction, in particular to an active thermal insulation control method under the freezing method construction condition. Comprising freezing holes formed in the periphery of a shaft, heat insulation holes and temperature measurement holes located between a derrick foundation and the freezing holes, a heat preservation plate pasted outside the derrick foundation, and a temperature, pressure and deformation monitoring system. The method comprises the following steps: starting independent liquid circulation of a freezing hole and a thermal insulation hole, starting a monitoring system, and collecting multi-source real-time data such as temperature, pressure and deformation in real time; inputting the data into a preset data fusion and intelligent prediction control system, and predicting the frost heaving deformation trend of the future derrick foundation through a built-in prediction model; and according to the prediction result, the liquid inlet temperature and flow of the thermal insulation hole are dynamically adjusted. According to the invention, the conversion from passive thermal insulation to active prediction and intelligent regulation is realized, the safety of the derrick foundation can be effectively protected, and the frost heaving hazard is reduced.

A refrigerator for tender-freezing and refrigeration of meat, and a meat tender-freezing method. The refrigerator for tender-freezing and refrigeration of meat has a tender-freezing working mode, and comprises: a tender-freezing component (1), comprising a refrigeration storage compartment and a cold conduction plate (13) dividing the refrigeration storage compartment into an air cooling chamber (11) and a storage chamber (12) which is used for hermetically storing meat in the tender-freezing working mode, wherein the air cooling chamber (11) and the storage chamber (12) are located on two opposite sides of the cold conduction plate (13); a refrigeration component used for providing cooling air in the tender-freezing working mode; and an air supply component used for receiving in the tender-freezing working mode the cooling air provided by the refrigeration component, and conveying the cooling air to the air cooling chamber (11) so as to perform convective heat exchange with the cold conduction plate (13), wherein in the tender-freezing working mode, the cold conduction plate (13) is cooled by the cooling air and then exchanges heat with the meat in the storage chamber (12) by means of the air in the closed storage chamber (12), so that the meat is supercooled.