82 results about "Cryogenic freezing" patented technology

The invention discloses an aquatic product ultra-low temperature fresh-keeping processing control method, and relates to the technical field of aquatic product fresh-keeping processing, and the method specifically comprises the following steps: evaluating a fat local oxidation risk grade caused by oxygen exposure on the surface of a high-fat aquatic product in each region in a freezing chamber; dividing each area in the freezing chamber into a low risk area, a medium risk area and a high risk area according to an evaluation result; constructing an oxidation risk adjustment mechanism according to the division result of each region in the freezing chamber; in the implementation process of the oxidation risk adjustment mechanism, whether the adjustment effect of the oxidation risk adjustment mechanism on each region can reach the expectation or not is evaluated, and the oxidation risk adjustment mechanism is optimized according to the evaluation result. According to the method, the problem of fat oxidation caused by oxygen exposure on the surface of the high-fat aquatic product in the ultralow-temperature freezing process is solved, and the preservation effect in the freezing process is effectively improved through real-time monitoring and dynamic optimization of an adjustment mechanism.

The invention discloses a novel preparation technology of low-temperature fresh-keeping cold-quenched tea, and relates to the field of cold-quenched tea preparation, and the novel preparation technology comprises the following steps: S1, fresh leaves are picked and then are directly subjected to low-temperature freezing treatment, the freezing temperature is-25 DEG C to-15 DEG C, and the freezing time is 20-40 minutes; s2, unfreezing and withering the frozen fresh leaves; s3, performing rocking treatment on the unfrozen and withered tea leaves; s4, rolling the rocked green leaves by adopting a gradient pressure method; s5, carrying out segmented fermentation treatment under temperature and humidity control conditions; s6, after fermentation is completed, performing low-temperature freezing on the tea leaves again; according to the novel preparation process of the low-temperature fresh-keeping cold-quenched tea, the ice crystal form is cooperatively regulated and controlled through staged freezing treatment, cell structure damage is reduced, dynamic rocking and gradient rolling processes are combined, the inclusion release path is accurately controlled, tea polyphenol, theaflavin and flower and fruit aroma components are effectively reserved, and the low-temperature fresh-keeping cold-quenched tea is prepared. And component loss caused by temperature fluctuation or single mechanical force in the traditional process is avoided.

The utility model discloses an ultralow-temperature freezing cross cascade heat pump system which comprises an air type two-stage cascade heat pump which comprises a low-temperature stage part and a high-temperature stage part. The low-temperature-stage part comprises a low-temperature-stage compressor, a four-way reversing valve, a low-temperature-stage condenser, a low-temperature-stage throttling device, a low-temperature-stage evaporator, a gas-liquid separator and a low-temperature freezing heat exchanger, and the high-temperature-stage part comprises a high-temperature-stage compressor, a high-temperature-stage condenser, a high-temperature-stage throttling device, a heat supply medium outlet pipe, a heat supply medium inlet pipe and a heat supply circulating pump. A cooling tower is arranged on one side of the high-temperature-stage condenser, the low-temperature freezing heat exchanger can achieve the functions of refrigeration and quick freezing, the problems that a traditional cross cascade type heat pump system is poor in refrigeration effect and low in efficiency in summer and poor in heating effect and low in efficiency in winter are solved, and the cross cascade type heat pump system has the advantage of quick freezing.

The utility model discloses hot spring gas collecting and processing equipment for earthquake prediction, which comprises a box body, a gas inlet pipe connected with an external gas collecting hood and a gas outlet pipe connected with external detection equipment, the gas outlet pipe and the gas inlet pipe are respectively connected with the upper end and the lower end of a gas supply branch pipe, and the upper end and the lower end of the gas supply branch pipe are U-shaped. Hot spring gas fed by the gas inlet pipe is divided into two paths to be conveyed in the gas supply branch pipe and is combined into one path at the gas outlet pipe to be conveyed into external detection equipment, and other parts, except for the two ends, of the gas supply branch pipe are all arranged in the box body. The spiral cooling liquid circulating pipe is arranged on the outer side of the air supply branch pipe to conduct low-temperature freezing on the hot spring gas, the freezing effect can be greatly improved, water vapor in the hot spring gas is rapidly desublimated into ice, and the purpose of rapid dehumidification is achieved. The part, in the box body, of the air supply branch pipe is bent in an S shape, so that the freezing time of hot spring air can be prolonged, the removal rate is improved, and water vapor is prevented from entering the detection equipment to influence the accuracy of a detection result.

The invention discloses a dry-wet freezing and thawing cycle test device suitable for a rock-soil sample. The device comprises a box body structure (a box body, a temperature-proof glass window, an exhaust hole and the like, and a thermal insulation layer is arranged between the inner wall and the outer wall of the box body); the humidity control system comprises a humidity control panel, a humidity system converter, a water storage tank, an atomizing nozzle, a fan, a humidity sensor and the like, drainage grooves and drainage holes are formed in the periphery of the bottom of the box body, and a drainage pipe is externally connected; the temperature control system comprises a temperature control panel, a temperature system converter, a heating pipe, a temperature sensor, a semiconductor refrigeration device and the like; and the quality control system comprises a quality control panel, a quality control converter, a weighing device and a sample placing table. According to the device, the dry-wet freezing and thawing cycle degree is controlled by testing the quality of the sample and converting the quality into the water content of the sample, the freezing and thawing process of the sample is realized by controlling low-temperature freezing and high-temperature thawing, the test efficiency and the test accuracy are improved, and the problems of complex test process and low test precision of the existing dry-wet freezing and thawing cycle test are effectively solved.

The invention provides a system and a method for regulating and controlling a plate bulging strain microcell. The system comprises a hydraulic bulging device, a multi-axis movement system, an online vision measurement system, a control system and a low-temperature medium spraying device, a plate is arranged in the hydraulic bulging device, and the low-temperature medium spraying device is installed at the tail end of the multi-axis movement system. Signals generated by the on-line vision measurement system are input into the control system, and the control system outputs the signals to the multi-axis movement system and the low-temperature medium injection device. According to the method and the device, the strength difference, the hardening difference and the ductility difference of the light alloy in different temperature intervals are utilized, and the method and the device capable of realizing strain microcell regulation and control are designed; different from preposed regulation and control measures in the prior art, such as integral heating, integral ultralow-temperature freezing and preset local heating and cooling measures, the strain evolution trend and rule of the plate can be monitored in real time.

The invention discloses a multi-bubble icebreaking experimental device and experimental method for simulating a polar region environment, relates to the technical field of bubble icebreaking, and solves the problem of lack of a multi-bubble coupling effect for icebreaking effect research. A natural sea ice preparation device is arranged in a controllable freezing test room; a vacuum controllable low-temperature freezing device of the natural sea ice preparation device is arranged at the upper end of a transparent vacuum wall surface freezing box; the vacuum controllable low-temperature freezing device comprises a rapid controllable freezing plate; an electric spark device is arranged at the bottom of a box body of the transparent vacuum wall face freezing box, rapid controllable freezing plates are arranged on a box body left plate, a box body right plate and a box body rear plate of the box body, the box body is cooled through the rapid controllable freezing plates, an ice layer is generated, and the electric spark device generates bubbles to break ice. According to the invention, icebreaking is realized through the bending moment superposition effect under the multi-bubble coupling effect, so that the load characteristic of bending moment superposition under the multi-bubble coupling effect is explored, and the action mechanism of bending moment superposition under the multi-bubble coupling effect is disclosed.

The invention discloses a powder puff processing method adopting a low-temperature freezing technology. The powder puff processing method comprises the following steps: S01, a washing stage: fully washing a foam body obtained by a foaming process with water; s02, a dehydration stage: dehydrating the foam body which is fully washed and drenched; s03, a freezing stage: performing low-temperature freezing treatment on the dehydrated foam body; s04, a processing stage: performing fine processing on the hardened foam body to obtain a powder puff blank; s05, a secondary washing stage: carrying out secondary washing on the formed powder puff blank; s06, a secondary dehydration stage: carrying out secondary dehydration on the powder puff blank subjected to secondary water washing; s07, a drying stage, wherein the powder puff blank is subjected to drying treatment; obtaining a powder puff finished product. Water in the powder puff is frozen into ice in a low-temperature freezing mode, and in the frozen state, the powder puff material becomes easier to treat and fix, so that the powder puff material can be processed into a designed shape, and the requirement of the market for powder puff shape diversification is met.

The utility model relates to a low-temperature unit, which comprises an absorption type unit and a compressor unit, the compressor unit at least comprises a compressor, a siphon type evaporator and a throttling component, the siphon type evaporator comprises a gas-liquid separator and an evaporator which are communicated through a pipeline, and the gas-liquid separator is positioned above the evaporator. The compressor, a heat exchange pipeline of the absorption type unit, the throttling component and the siphon type evaporator are sequentially communicated through pipelines to form a main circulation loop of refrigerants so as to prepare low-temperature chilled water. After refrigerant liquid is throttled, one part of liquid refrigerant is flashed into gaseous refrigerant and gas-liquid refrigerant enters the gas-liquid separator, the gas-liquid separator is located above the evaporator and supplies liquid to the evaporator by means of gravity, and the liquid refrigerant absorbs heat of chilled water in the evaporator and is partially gasified, so that liquid at an inlet and an outlet of the evaporator generates density difference; the mass flow rate and the circulation ratio of the refrigerant in the tube pass of the evaporator are improved, the heat exchange efficiency of the refrigerant in the siphon evaporator is improved, and chilled water with the temperature below-30 DEG C is prepared.

A dehumidification air conditioning system for freezing and drying water-containing cultural relics with independent temperature and humidity control functions, the dehumidification system includes a low-temperature freezing and dehumidification unit arranged outside the freeze-drying room and a dehumidification terminal unit arranged in the equipment room of the freeze-drying room and connected to the low-temperature freezing and dehumidification unit through a four-way reversing valve, the temperature control system includes a low-temperature freezing temperature control unit arranged outside the freeze-drying room and a temperature control terminal unit arranged in the equipment room of the freeze-drying room and connected to the low-temperature freezing temperature control unit through a first expansion valve, the dehumidification terminal unit and the temperature control terminal unit are used to perform corresponding dehumidification and temperature treatment on the air entering from the return air grille formed between the freeze-drying room and the equipment room, and then send the air into the freeze-drying room through the air supply port formed between the equipment room and the air guide space at the top of the freeze-drying room and the air supply orifice plate of the air guide space in turn. The present invention can not only freeze and dehumidify water-containing cultural relics, but also can freeze and preserve cultural relics for a long time in a low-humidity environment.

This invention relates to the field of coal mine drilling technology and discloses a coal seam fracture water injection dust suppression device and its usage method. The device includes a handle, a liquid nitrogen injection pipe fixedly connected to the surface of the handle, a liquid nitrogen storage tank fixedly connected to the end of the liquid nitrogen injection pipe, and an injection assembly mounted on the handle. The injection assembly includes a nitrogen inlet pipe fixedly connected to the handle, and an arc-shaped ring fixedly connected inside the nitrogen inlet pipe along the liquid outlet direction. In terms of nitrogen injection, the arc-shaped rings form a conical chamber, causing the liquid nitrogen to be ejected in a conical, pressurized manner. Simultaneously, the high-speed jet in the upper half of the conical chamber's cross-section carries a stronger impact force, capable of breaking up a larger area of ​​coal, while the lower-velocity liquid nitrogen in the lower half focuses on cryogenic freezing, assisting fracture expansion through phase change expansion, significantly improving fracture generation efficiency. With the same volume of liquid nitrogen, the utilization rate is higher, indirectly reducing the cost of nitrogen injection.

The utility model discloses a pre-cooling defrosting device for an ultra-low temperature refrigerator, and relates to the technical field of pre-cooler defrosting. The defrosting device comprises a defrosting box and a rectangular groove formed in the front face of the defrosting box. A moving mechanism, two mounting mechanisms and an air drying mechanism are arranged on the defrosting box. The moving mechanism comprises a first moving assembly and a second moving assembly, the first moving assembly comprises a strip-shaped block installed on the inner wall of the left side of the defrosting box, a strip-shaped groove is formed in the right side of the strip-shaped block, a threaded rod is rotatably installed in the strip-shaped groove, and the threaded rod is sleeved with a first connecting block in a threaded mode; a rectangular frame is mounted on the right side of the first connecting block, and a motor is mounted at the top of the defrosting box. By arranging the moving mechanism and the air drying mechanism, frost on the precooler can be rapidly removed, moisture on the precooler can be rapidly dried, and the defrosting efficiency is greatly improved.

A spiral conveyor cryogenic freezer for thermal conditioning of cold chain phase change material panels and associated method of expedited ready-for-use thermal conditioning of thermally-spent cold chain phase change material panels. A two-stage inline system for thermal conditioning of cold chain phase change material panels that includes the spiral conveyor cryogenic freezer and a spiral conveyor thermal tempering unit and associated method of expedited ready-for-use thermal conditioning of thermally-spent cold chain phase change material panels. A redundant two-stage inline system for thermal conditioning of cold chain phase change material panels that includes a pair of units each capable of independently cryogenically freezing and thermal tempering of cold chain phase change material panels and associated method of expedited ready-for-use thermal conditioning of thermally-spent cold chain phase change material panels.

The invention discloses a commercial low-temperature freezer which comprises a freezer body, a freezer chamber is arranged at the bottom end of the freezer body, a freezer is arranged in the freezer chamber and comprises a condenser and a compressor, and the condenser and the compressor are connected through a condensation pipeline. A first detection assembly used for automatically starting detection is arranged at the bottom end of the condensation pipeline, and the condensation pipeline is further connected with a detection loop. According to the technical scheme, by arranging the first detection assembly, the second detection assembly and the detection loop, when condensed water is attached to the outer wall of the condensation pipeline due to invasion of warm air, the first detection assembly can collect the condensed water and send a signal to control the second detection assembly to be matched with the detection loop; the flow velocity in the condensation pipeline is detected, so that whether ice blockage occurs in the condensation pipeline or not is detected in time, the service life of the freezer is prolonged, and the working efficiency of the freezer is improved.

A visual freezing system for observing the ultra-fast freezing process of a small amount of cells at low temperature, mainly including a biological sample cabin for placing samples to be tested, a low-temperature freezing table for providing freezing cold, a protective gas subsystem for protecting the system from frost and condensation, an imaging recording subsystem for observing and recording the freezing process, a motion control subsystem for controlling the system movement to realize the system function, and a temperature measurement control subsystem for monitoring the system temperature. The present invention can rapidly and speed-controllably cool down cell samples; can visually image the rapid cooling process in a very short time, which is convenient for studying the formation mechanism of cell ice crystals; can change the atmosphere in the biological sample cabin and change the cabin pressure to a certain extent, which is convenient for studying the freezing process of samples under different atmospheres; can prevent the problem of condensation and frosting at low temperatures by blowing dry protective gas, and the sample changing operation is simple.

The utility model relates to the technical field of refrigeration, in particular to an ultralow-temperature freezing storage box. Comprising a box body, a partition plate is arranged in the box body and divides the box body into a refrigeration cavity and a storage cavity, refrigeration equipment is arranged in the refrigeration cavity, a plurality of heat dissipation holes are formed in the side wall of the box body, and guide rails fixedly connected with the box body and the partition plate are arranged at the two ends in the storage cavity; a bearing disc is arranged between the two guide rails, sliding strips in sliding connection with the guide rails are fixedly connected to the two sides of the bearing disc, and elastic limiting mechanisms in limiting fit with the sliding strips are arranged at the tops of the two guide rails. The ultralow-temperature freezing storage box is compact in structure, even in temperature distribution and convenient and fast to operate, the refrigerating efficiency is improved by optimizing the cavity layout and the design of the bearing mechanism, meanwhile, the refrigerating capacity loss risk is reduced, and the controllability and stability of the storage unit are enhanced.

The utility model relates to the technical field of freezing processing, in particular to blade or steel strip continuous ultralow-temperature freezing equipment which comprises a freezing cavity, a cold source is arranged in the freezing cavity, an exhaust port and a liquid outlet are formed in the freezing cavity, a feeding hole and a discharging hole are formed in the feeding position and the discharging position of the freezing cavity, a cover plate is connected to the top end of the freezing cavity in a sealed mode, and a freezing track is arranged in the freezing cavity. A cold guide plate is arranged above the freezing track, the two ends of the freezing track are connected with a feeding hole and a discharging hole respectively, and a purging device is arranged on the feeding hole or the discharging hole and used for purging the surface of a product located at the feeding hole or the discharging hole; the freezing track can provide supporting and guiding for products, the products enter from the feeding hole in one side of the box body and reach the discharging hole through the freezing track, it can be guaranteed that the freezing temperature of the products is uniform in the section of the freezing track, and the blowing device is arranged so that frost generated when the products make contact with outside air after being frozen can be removed; and the feeding hole or the discharging hole cannot be frosted under long-time low-temperature work.

The application discloses a method for manufacturing a large-heat-exchange-capacity low-flow-resistance low-temperature helium cabin, which comprises radiation red copper plates, red copper cooling coil pipes and a helium cabin support, the interior of the radiation red copper plate of the helium cabin is sprayed with special low-temperature black paint to make the internal emissivity greater than 0.92, and the radiation efficiency is greatly improved, the red copper cooling coil pipe adopts three-branch flow parallel cooling of the radiation red copper plate of the helium cabin, the temperature rise of the cooling helium flow is reduced, and the temperature difference of the whole helium cabin is very small, the low-temperature freezing red copper pipe bending process of the special equipment is adopted to ensure that the cooling coil pipe is not concave and wrinkled, the cooling helium flow resistance meets the requirements, the optimized low-temperature tin soldering welding process and the use of red copper pressing sheets and special aluminum foils greatly improve the heat transfer area and ensure the heat transfer efficiency.

The invention discloses a high and steep slope strong freezing and thawing resistant vegetation block and a green low-temperature freezing preparation method and application, and aims at solving the core technical problems that an ecological restoration material is prone to structure instability, water and fertilizer are difficult to maintain, vegetation adaptability is poor, and construction is inconvenient. The method comprises the following steps: uniformly mixing soil, organic matters, a water-retaining agent, hydrothermal carbon and a slow-release fertilizer to obtain a substrate; then adding fibers and carrying out dry mixing to construct a three-dimensional reinforced framework; mixing a cementing agent, and stirring to prepare a flow-state mixture; laying in a mold by adopting a layered structure, and uniformly sowing suitable plant seeds on the surface layer to prepare a plant growing block prototype of the pre-buried seeds; through low-temperature freezing treatment and demolding air-drying treatment, the block is shaped into a block which is stable in structure, can be carried and assembled and is internally provided with a porous framework structure. The vegetation block has mechanical stability, excellent freeze-thaw resistance and ecological functionality, and is especially suitable for rapid ecological restoration of steep slopes in ecologically fragile environments such as Qinghai-Tibet Plateau and northwest cold and arid regions.

The application discloses a device for detecting the compressive strength of concrete under low temperature and high salt fog environment, and relates to the technical field of concrete durability test equipment. The device comprises a shell, an opening and closing device, a liquid adding device, a liquid level sensor, a liquid discharging valve, a liquid temperature sensor, a liquid concentration sensor, a spraying device, a temperature and humidity sensor, a fog concentrator, an air supply device, a heat leading device and a cold leading device connected to the air supply device, a base frame and a compressive strength detector. The device has the advantages that full-automatic closed-loop control can be realized on the liquid level, concentration, temperature of the soaking liquid, air temperature and humidity, and salt fog concentration, the test conditions are stable and repeatable, the multi-component pipes and nozzles of the spraying device are uniformly distributed, natural diffusion and settlement of the salt fog are realized, direct spraying is avoided, the air supply device cooperates with the heat leading device and the cold leading device, uniform heating and cooling are realized through air circulation, direct cold and hot collision is avoided, and the complete deterioration process of "salt fog wetting, low temperature freezing and dry concentration" can be accurately reproduced.

The application discloses a cascade deep-freezing system, which comprises a high-temperature stage circulating loop, a low-temperature stage circulating loop and an evaporative condenser connecting the high-temperature stage circulating loop with the low-temperature stage circulating loop, the evaporative condenser comprises a low-temperature stage condenser on one side and a high-temperature stage evaporator on the other side, the low-temperature stage condenser is connected in the low-temperature stage circulating loop, the high-temperature stage evaporator is connected in the high-temperature stage circulating loop, a spraying loop and a low-temperature freezing loop are further connected to the low-temperature stage circulating loop, and the spraying loop and the low-temperature freezing loop are both in heat exchange with refrigerant in the low-temperature stage circulating loop through unfreezing liquid. Different from the single-step quick-freezing process of the traditional device, the freezing system provided by the application can carry out a two-step freezing process of'spraying initial freezing-low-temperature freezing', so that the loss and volatilization of water can be effectively reduced, and the freshness of food can be locked to the maximum extent.

The application discloses a kind of multi-bubble ice breaking experimental device and experimental method under simulated polar environment, it is related to bubble ice breaking technical field, lack of multi-bubble coupling effect on ice breaking effect research problem is solved.The natural sea ice preparation device is set in controllable refrigeration laboratory;The vacuum controllable low-temperature freezing device of natural sea ice preparation device is set on the upper end of transparent vacuum wall surface freezing box;Vacuum controllable low-temperature freezing device includes rapid controllable freezing plate;The box body bottom of transparent vacuum wall surface freezing box is provided with spark device, the box body left plate, box body right plate and box body back plate of box body are all provided with rapid controllable freezing plate, cooling is generated ice layer to box body by rapid controllable freezing plate, and bubble ice breaking is generated by spark device.The present application realizes ice breaking by the bending moment superposition effect under the coupling effect of multiple bubbles, so as to explore the load characteristics of bending moment superposition under the coupling effect of multiple bubbles, and reveal the action mechanism of bending moment superposition under the coupling effect of multiple bubbles.

The application relates to a low-temperature freeze-drying system which comprises a material chamber, a freezing assembly and a cooling assembly, the material chamber is provided with a plurality of trays, the freezing assembly comprises a plurality of freezing pipes and a vacuum pump, the freezing pipes are in one-to-one correspondence with the trays, and a suction pipe is connected between the plurality of freezing pipes and the vacuum pump. In the application, the freezing pipes and the vacuum pump are arranged, the water in the freezing pipes is recycled, the user does not need to supply water to the low-temperature freeze-drying system all the time, material waste is reduced, the energy-saving concept is embodied, the use cost of the low-temperature freeze-drying system for the user is reduced, the drying assembly is arranged, ice in the material absorbs heat to sublimate to form water vapor, the material is dried, and the storage time of the material is prolonged, the water storage tank is arranged, the vacuum pump is cooled, the vacuum pump is not prone to damage caused by long-time operation in a high-temperature state, and the service life of the vacuum pump is prolonged.

The invention discloses a method for freezing and storing CO2 by using functional carbon with a Janus structure, which comprises the following steps of: 1, doping, mixing and drying pickled straws, inert metal salt and a high-performance activating agent, and activating in a high-temperature inert atmosphere to prepare a functional carbon material with a mesoporous-microporous tandem hydrophobic functional carbon structure; 2, carrying out hydrothermal carbonization reaction on the functional carbon material and a substance containing nitrogen and oxygen elements to obtain internal hydrophobic-external hydrophilic functional carbon powder with a Janus structure; and 3, placing the carbon powder in a high-pressure CO2 environment for saturated adsorption, placing the carbon powder in an aqueous solution, and freezing and sealing. According to the invention, a directional freezing system based on internal hydrophobic-external hydrophilic mesoporous-microporous hole series connection type functional carbon with high CO2 adsorption capacity is constructed, so that low-temperature long-time high-capacity stable storage of CO2 is realized, and the problem of a carbon source in a novel adsorption compression carbon dioxide supercritical / transcritical energy storage system is fundamentally solved.

The invention provides a defroster and a defrosting method capable of directly discharging frost formed on the defroster in a frosted state. The defroster is provided with: a suction port through which air to which frost adheres is sucked; a filter unit to which the frost adheres and which separates the frost from the air; a first flow path through which the air from which the frost has been separated by the filter unit is fed into an ultra-low temperature freezer; and a discharge unit that discharges the frost falling from the filter unit to the outside.

Provided is an ultra-low temperature refrigeration system capable of directly discharging frost that has been frosted in a defroster in a frosted state. A cryogenic refrigeration system (1) is provided with: a cryogenic freezer (10); an air refrigerant refrigerator (30) that cools the air in the ultra-low temperature freezer and supplies the cooled air into the ultra-low temperature freezer; and a defroster (40) that is provided in the ultra-low temperature freezer and that removes frost in air supplied from the air refrigerant refrigerator into the ultra-low temperature freezer.

The utility model discloses a hot melt adhesive sheet forming machine which comprises a machine frame, an upper conveying belt, a lower conveying belt, a driving mechanism, a thermocompression bonding device and a cooling device, the upper conveying belt and the lower conveying belt are used for clamping and conveying a hot melt adhesive sheet, the driving mechanism is used for driving the upper conveying belt and the lower conveying belt to move, and the thermocompression bonding device and the cooling device are sequentially arranged in the conveying direction. After the pressing air bag is inflated, the two conveying belts and the hot melt adhesive sheet clamped and conveyed between the two conveying belts can be pressed and tightly attached to the low-temperature freezing plate together to be cooled. According to the hot melt adhesive sheet forming machine, after the adhesive sheet is subjected to hot press forming, the cooling device is used for conducting and cooling one side, located on the upper conveying belt, of the hot melt adhesive sheet so that the hot melt adhesive sheet can be separated from the conveying belt, and therefore the adverse effect caused by the fact that the conveying belt is adhered and the hot melt adhesive sheet enters the machine again along with the conveying belt to be repeatedly machined is avoided; and the reject ratio caused thereby is reduced.

This invention discloses a manufacturing process for a cold chain logistics insulated box and the insulated box thereof, belonging to the field of insulation materials. This invention achieves a synergistic improvement in the thermal conductivity, flexibility, energy storage density, and reliability of cold chain logistics cold storage materials by constructing an expanded graphite-sodium polyacrylate dual-network composite structure. Using a combination of vacuum impregnation and in-situ polymerization, a flexible sodium polyacrylate polymer network is constructed within the three-dimensional thermally conductive skeleton of expanded graphite, forming a rigid-flexible interpenetrating dual-network structure. By controlling the type of phase change material (water-based or eutectic salt system) and the composition of the dual network, the phase change temperature can be precisely adjusted within the range of -21°C to 0°C, covering the full temperature range requirements of fresh food preservation, pharmaceutical cold chain, and cryogenic freezing. The water-based system is suitable for short-term, high-frequency, and cost-sensitive scenarios; the eutectic salt system is suitable for long-term, high-temperature challenges, and high-reliability scenarios, forming a complementary technical solution.

The present invention discloses a high-low temperature freezing and refrigeration system and a control method thereof, comprising a timing switch, a star converter, a delta converter, a conversion component, a high-temperature screw compressor, a low-temperature screw compressor, a protection component, a temperature measuring device 1, an information feedback transmitter, a sub-control switch, a temperature measuring device 2, a temperature comparison feedback device, an information transmitter and an adjustment switch. The present invention measures the temperature in the warehouse by using a temperature measuring device 1, and then controls the high-temperature screw compressor and the low-temperature screw compressor to work alternately by using a sub-control switch.