51 results about "Cryogenic freezing" patented technology

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 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.

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 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.

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.

A freezing system comprises a freezing section that freezes frozen objects using a refrigerant and a liquid-cutting section for removing refrigerant adhering to the surface of the objects, the liquid-cutting section being movably assembled with the freezing section. The freezing section comprises a freezing main body, a motion assembly for moving the objects up and down and horizontally within the freezing main body, and a cooling device, each of which is assembled on the freezing main body. The freezing system uses refrigerant to rapidly freeze the objects at low temperatures. The cooling device increases the surface area of ​​the freezing coil, thereby improving heat conduction efficiency, resulting in high freezing efficiency. The cooling device also increases the surface area of ​​the radiator, thereby improving heat dissipation efficiency. Furthermore, the present invention utilizes a motion assembly to place, remove, or horizontally move the objects, significantly reducing human resources. Finally, the liquid refrigerant section of the present invention efficiently collects liquid refrigerant dripping from the surface of the objects.

The invention belongs to the technical field related to low-temperature freezing, and discloses array type liquid nitrogen quick-freezing equipment and method based on a multi-mode fluid oscillator, and the array type liquid nitrogen quick-freezing equipment comprises a quick-freezing cavity and a nozzle array arranged in the quick-freezing cavity; the nozzle array is formed by arranging a plurality of fluid oscillator nozzles in an array mode, the fluid oscillator nozzles can convert input continuous liquid nitrogen flow into fan-shaped oscillation jet flow periodically swinging within a preset sweeping angle range, and each fluid oscillator nozzle comprises a fluid oscillator inlet, a fluid oscillator cavity and a fluid oscillator outlet. The fluid oscillator inlet and the fluid oscillator outlet are respectively connected to two opposite sides of the fluid oscillator cavity; the fluid oscillator cavity is divided into two feedback channels and a fluid mixing chamber which are communicated, the two feedback channels are symmetrically arranged relative to the fluid mixing chamber, and the fluid mixing chamber is located between the fluid oscillator inlet and the fluid oscillator outlet. The cold field uniformity and the liquid nitrogen utilization rate are improved.

The invention relates to a composite material plate, in particular to a plastic-wood plate without cracking under a low-temperature freezing condition and a preparation method of the plastic-wood plate, and belongs to the technical field of ecological environment materials and composite materials. The invention relates to a plastic-wood plate without cracking under a low-temperature freezing condition. The plastic-wood plate is formed by compounding low-temperature-resistant plastic particles, joint modified wood flour, a methyl methacrylate / butadiene / styrene terpolymer, laurinol, long-chain fatty acid ester and an antioxidant. According to the invention, the low-temperature-resistant plastic matrix, the polydopamine layer and the aminated inorganic particles are combined to modify the wood flour and the combined long-chain plasticizing system, so that the obtained plastic-wood plate has good mechanical property and excellent low-temperature freezing resistance.

The invention discloses double-refrigerant rapid refrigeration emergency repair equipment and method, and belongs to the technical field of underground engineering reinforcement, the emergency repair equipment comprises an emergency repair main body, a liquid nitrogen tank and a carbon dioxide freezing refrigeration system, and the method is characterized in that the liquid nitrogen tank is connected with an inlet and an outlet of a low-temperature freezing module in the emergency repair main body through an input pipe and an output pipe; a water leakage point on the freezing wall is blocked by the rescue main body, and the damaged freezing wall is rapidly reinforced by liquid nitrogen; and then continuously supplying liquid carbon dioxide to the emergency rescue main body by using an existing carbon dioxide freezing and refrigerating system in the tunnel, and continuously freezing the emergency rescue main body to buy emergency rescue time for a project. According to the method, an ultralow-temperature refrigeration technology is adopted, the freezing effects of different refrigerants are comprehensively utilized, the frozen wall after the cryogenic freezing connection channel engineering is damaged is rapidly repaired, and the problems of tunnel deformation and collapse are avoided; and meanwhile, the emergency rescue main body is convenient to install and has small influence on the engineering, the engineering risk is controlled within a low intensity range, and the emergency rescue main body can be recycled after emergency rescue is completed.

The invention discloses a cold-chain logistics heat preservation box body preparation process and a heat preservation box thereof, and belongs to the field of heat preservation materials.According to the cold-chain logistics heat preservation box body preparation process, by constructing an expanded graphite-sodium polyacrylate double-network composite structure, collaborative improvement of a cold-chain logistics cold storage material in the aspects of heat conductivity, flexibility, energy storage density and reliability is achieved; a method of combining vacuum impregnation and in-situ polymerization is adopted, a sodium polyacrylate flexible polymer network is constructed in an expanded graphite three-dimensional heat-conducting framework, a rigid-flexible interpenetrating double-network structure is formed, and a phase-change material type water-based or eutectic salt system and double-network composition are regulated and controlled, so that the composite material is prepared. The phase change temperature can be precisely adjusted within the range of-21 DEG C to 0 DEG C, the requirements of fresh food preservation, medicine cold chains and cryogenic freezing full-temperature areas are met, and a water-based system is suitable for short-time, high-frequency and cost-sensitive scenes; the eutectic salt system is suitable for long-time, high-temperature challenging and high-reliability scenes, and a complementary technical solution is formed.

The invention provides a transparent soil preparation method for visually simulating and demonstrating the melting and seepage process of ice-rich moraine soil, and belongs to the technical field of geotechnical engineering visual model tests. The preparation method comprises the following steps: preparing quartz glass particles; preparing a mixed liquid from white oil and n-dodecane; preparing a mixed liquid frozen block; preparing test soil from the mixed liquid, quartz glass particles and fused quartz sand; laying a test soil layer; laying a mixed liquid frozen block layer; repeatedly and alternately paving the test soil and the mixed liquid frozen blocks until the total thickness meets the test requirement; freezing at low temperature to obtain the transparent soil. The quartz glass particles, the fused quartz sand, the mixed liquid and the mixed liquid frozen blocks are used for simulating coarse gravels, sandy soil, pore fluid, buried ice and other components in the moraine-rich soil respectively, the refractive indexes of all the components are matched, and the technical problem that the melting and seepage process in the moraine-rich soil is difficult to visualize is solved; the method is of great significance to reveal a moraine soil internal structure degradation mechanism under the freezing and thawing effect.

The invention discloses an efficient low-temperature freezing water removal method and device, and relates to the technical field of low-temperature freezing water removal, and the efficient low-temperature freezing water removal device comprises a first-stage freezer, a second-stage freezer, a closed-loop spiral disc, a vibrator and a feeding atomizer. Liquid materials are converted into small-particle-size solid particles which are internally loose and porous through the feeding atomizer and the first-stage freezer, the contact area of the liquid materials and a low-temperature negative-pressure environment in the second-stage freezer can be increased, the migration path of water in the particles is shortened, the water removal efficiency and effect are improved, and after the liquid materials enter the closed-loop spiral disc subsequently, the water removal efficiency is improved. The spiral structure of the closed-loop spiral disc provides a long-path and low-flow-speed motion trail for solid particles, it is ensured that the particles have enough time to make contact with the low-temperature negative-pressure environment in the second-stage freezer, under vibration of the vibrator, the frozen solid particles roll on the closed-loop spiral disc to move, the contact with the low-temperature negative-pressure environment is increased to the maximum extent, and the solid particles are prevented from being frozen. The particle surface is continuously updated, the attachment of water vapor on the particle surface is reduced, and the mass transfer effect is improved.

The utility model relates to a hanging basket type frozen sleep machine, including frame, refrigeration system, placing frame and lift subassembly, refrigeration system is installed in the frame, the frame is equipped with the frozen sleep groove of containing placing frame, refrigeration system is equipped with output end and input end, output end and input end are communicated with frozen sleep groove upper part and lower part respectively, the lift subassembly is equipped with the lifting subassembly, and the lifting subassembly is equipped with the lifting subassembly. The lifting assembly is installed on the machine frame and located above the sleep freezing groove. According to the hanging basket type cryogenic sleep machine, when cryogenic freezing is carried out, the lifting assembly drives the placing frame to descend and be placed in the cryogenic sleep groove, then refrigerating fluid is conveyed through the refrigerating system, enters from the upper portion of the cryogenic sleep groove through the output end and then flows out from the lower portion of the cryogenic sleep groove through the input end. Therefore, a whole flowing circulation is formed through the whole freezing sleeping tank, the flowability is improved, and the freezing efficiency is better improved.

The utility model relates to the technical field of refrigeration, in particular to a low-temperature water energy-saving preparation device with a closed cooling tower and a water chilling unit linked. The device comprises a closed cooling tower, a water cooling unit, a mixed water tank and a sensor, a cooling coil is arranged in the closed cooling tower, the upper end of the cooling coil is connected with a first water inlet pipe, the lower end of the cooling coil is connected with a first water outlet pipe, and a condenser of the water cooling unit is provided with a second water inlet pipe and a second water outlet pipe. The second water outlet pipe is communicated with the first water inlet pipe through a first pipeline, a first three-way valve is arranged on the first pipeline, and a second three-way valve, a freezing pump buffering water tank and a cooling tower cooling pump are sequentially arranged between the first water outlet pipe and the second water inlet pipe from left to right and are communicated through pipelines. A third water inlet pipe and a third water outlet pipe are arranged on an evaporator of the water cooling unit, and the mixed water tank is communicated with the closed cooling tower and the water cooling unit through pipelines. The device solves the problems that the cooling tower cannot produce low-temperature chilled water in summer and the chilled water production energy consumption of the water chilling unit is high in winter.

The application discloses an oxygen-rich cooperative multi-mode cold therapy cabin system, which comprises a refrigeration system, an environmental control system, a movable local enhanced cold therapy system, an in-cabin monitoring system, a photodynamic therapy system and a two light distribution structure, wherein the refrigeration system, the environmental control system, the movable local enhanced cold therapy system, the in-cabin monitoring system and the photodynamic therapy system are connected to a main controller; the application provides an ultralow-temperature cryotherapy equipment which can combine oxygen-rich recovery, photodynamic therapy and local position enhanced cold therapy; the refrigeration system cooperates with the environmental control system to realize a wide temperature range of -40 DEG C to -110 DEG C in the cold therapy cabin and realizes a rich and nourishing treatment environment; in combination with the photodynamic therapy system, different physical factors can be provided by the oxygen-rich cooperative multi-mode cold therapy cabin system according to different treatment purposes of patients, so that the treatment effect of the treatment purpose can be achieved.

The application belongs to the technical field of materials, and particularly relates to a kind of cold-resistant PLA composite material and its preparation method. According to the total weight of raw materials 100 parts, the raw material composition of the cold-resistant PLA composite material includes: PLA 45-70 parts, anti-freezing modifier 14-25 parts, reinforcing agent 14-25 parts and compatibility agent 1-5 parts. The application selects polyhydroxyalkanoate as the toughening agent of the main base material, and polycaprolactone as the auxiliary toughening agent. Under the cooperation of the two, the toughness and better low-temperature freezing resistance characteristics obtained are better than those obtained by adding each alone. The nano talc powder is matched with modified starch, the body rigidity is moderate, the film is poked and crystallized while the better low-temperature freezing resistance characteristics are obtained. The acrylate copolymer is used as the compatibility agent, and the anti-freezing modifier produces a synergistic effect, further improving the low-temperature freezing resistance characteristics of the material. The product has obvious effect, and has broad commercial application prospect and market value.

The present application relates to wastewater treatment technical field, and discloses low-temperature freezing sublimation crystallization device for wastewater treatment, including low-temperature freezing tank and the sublimation crystallization box being arranged below low-temperature freezing tank, the top surface of sublimation crystallization box is fixedly installed with inlet pipe, and the outlet end between inlet pipe and low-temperature freezing tank is fixedly installed with the pipe, and the inside of pipe is rotatably installed with the transport dragon, and the processing structure for sublimating wastewater ice is arranged on sublimation crystallization box, the top surface of sublimation crystallization box is provided with the material opening being communicated with inlet pipe, and the inside top surface of sublimation crystallization box is provided with the enlarged opening being communicated with material opening.The present application is broken by reciprocating vibration breaking design of ice assembly, and the transport dragon drives ice roller to rotate, and reciprocating sliding of ice roller is realized by cooperating with guide rod and corrugated guide groove, so that the ice block of wastewater is extruded and vibrated, and the large ice block is quickly broken into small ice, the contact area of ice and sublimation environment is increased, and the rate of wastewater sublimation treatment is improved from the source.

The invention relates to the technical field of lubricating oil testing methods, in particular to a lubricating oil oxidation resistance testing method and system.The method comprises the following steps that sample pretreatment is conducted, specifically, at least two equal lubricating oil samples are taken, and after low-temperature freezing, the samples are immediately transferred into a high-temperature environment to complete hot and cold circulation; carrying out multi-field coupling test: firstly carrying out temperature dynamic change and vibration cooperative treatment, then alternately introducing mixed gases of different components at a constant temperature, and synchronously regulating and controlling humidity circulation; carrying out extreme strengthening test: firstly carrying out ultraviolet light and electric field synergistic photoelectrocatalysis treatment on the sample, and then carrying out pressure pulse cycle and sulfur-containing gas intervened oxidation treatment; and data evaluation: obtaining the measured content of the sediments at different time nodes and completing the critical early warning of the oxidation resistance of the lubricating oil. Through multi-step tests including a multi-field coupling test and an extreme strengthening test, various complex working conditions are simulated, the antioxidant performance of the lubricating oil under the influence of different environmental factors can be analyzed in a targeted manner, and a test result is more suitable for an actual application scene.

The application provides a phase separation valve control device, a control method and a low-temperature cryoablation system, which comprises a switch control module and a temperature sensing module, the switch control module is configured to determine whether to open the phase separation valve according to the operation specification of the low-temperature cryoablation system where the phase separation valve is located, the temperature sensing module is configured to obtain the target temperature at the exhaust port of the phase separation valve after the switch control module opens the phase separation valve, and the switch control module is further configured to determine whether to close the phase separation valve according to whether the target temperature is higher than a first temperature threshold. Based on the technical scheme of the application, based on the control of the phase separation valve, the waste of the refrigeration working medium is reduced, the consumption rate of the refrigeration working medium is obviously reduced, the duration of the system that can be used for low-temperature freezing is prolonged, and there is no adverse effect on the temperature and ablation effect of the ablation system.

The invention relates to the technical field of wastewater treatment, and discloses a low-temperature freezing sublimation crystallization device for wastewater treatment, which comprises a low-temperature freezing tank and a sublimation crystallization box arranged below the low-temperature freezing tank, a feeding pipe is fixedly mounted on the top surface of the sublimation crystallization box, and a guide pipe is fixedly mounted between the feeding pipe and the discharging end of the low-temperature freezing tank; a conveying auger is rotatably mounted on the inner side of the guide pipe, a treatment structure for sublimating waste water crushed ice is arranged on the sublimation crystallization box, a material opening communicated with the feeding pipe is formed in the top surface of the sublimation crystallization box, and an expansion opening communicated with the material opening is formed in the inner top surface of the sublimation crystallization box. By means of the reciprocating vibration crushing design of the ice crushing assembly, a conveying auger drives an ice crushing roller to rotate, meanwhile, a guide rod and a corrugated guide groove are matched to achieve vertical reciprocating sliding of the ice crushing roller, waste water ice blocks are subjected to extrusion and vibration double crushing, large ice blocks are quickly crushed into small crushed ice, the contact area of the crushed ice and the sublimation environment is increased, and the efficiency is improved. And the wastewater sublimation treatment rate is increased from the source.

The utility model relates to the technical field of freezing boxes, and discloses a replaceable low-temperature freezing box which comprises a shell, a sliding rail is fixedly connected to the interior of the shell, an inner core cabin is slidably connected to the interior of the sliding rail, a handle is fixedly connected to the interior of the inner core cabin, a sealing cover is arranged on one side of the shell, and the sealing cover is arranged on the other side of the shell. A supporting block is fixedly connected to the top of one side of the inner core cabin, a connecting column is rotatably connected to the interior of the supporting block, a fixing frame is fixedly connected to the inner wall of the shell, a supporting shaft is fixedly connected to the interior of the fixing frame, and a first buckle is rotatably connected to the outer wall of the supporting shaft. According to the utility model, the inner core is placed in the inner core cabin and slides into the shell, and the connecting column exerts pressure on the first buckle and the second buckle, so that the first spring shrinks and rebounds for fixation, and the effect of directly replacing the inner core and keeping low temperature for a long time is realized; the problems that an existing freezing box is difficult to keep low temperature for a long time in a high-temperature environment in summer, and the freezing box needs to be replaced frequently in the experiment process are solved.