170 results about "Cold treatment" patented technology

The invention discloses a pennisetum purpureum gene PpbHLH148L and application thereof in improving the cold resistance of plants, and relates to the technical field of gene engineering. The nucleotide sequence of the gene is as shown in SEQ ID NO.5. After the gene is subjected to subcellular localization and expression condition analysis after cold stress, the gene is related to low-temperature tolerance. An overexpression vector of the gene is constructed, Agrobacterium tumefaciens is transferred, then Arabidopsis thaliana infection is carried out, cold tolerance determination is carried out on overexpressed Arabidopsis thaliana, phenotypic difference and physiological index difference between an overexpressed strain after cold treatment and a wild type are observed, and it is found that the gene can significantly improve the low-temperature stress tolerance of Arabidopsis thaliana. And in the low-temperature treatment of the pennisetum alopecuroides transgenic callus, the transgenic callus also shows higher tolerance than the wild callus at low temperature. The pennisetum purpureum gene PpbHLH148L can be used for low-temperature tolerance modification of plants, and has an application prospect in creation of low-temperature-resistant plant materials.

The invention discloses a cold response PaIBH1 protein and application of a coding gene thereof in enhancing cold stress resistance of plants. The cold response PaIBH1 protein is a protein PaIBH1 with an amino acid sequence as shown in SEQ ID NO: 2. Experiments prove that the gene for coding the protein PaIBH1, namely the gene PaIBH1, is overexpressed in wild type arabidopsis thaliana, so that the cold resistance of the arabidopsis thaliana can be improved; the improvement of the cold resistance shows that after cold treatment, the fresh weight of the overground part is increased, the wilting rate is reduced, the leaf membrane damage and electrolyte leakage are reduced, the photosynthetic ability is improved, the membrane lipid peroxidation damage is relieved, the active oxygen scavenging ability is enhanced and / or the active oxygen accumulation in the plant body is reduced. Therefore, the protein PaIBH1 can improve the cold resistance of the plants. The method has a very wide application prospect in the aspect of cold-resistant genetic improvement of crops or pasture.

The invention discloses a long-service-life composite heat treatment method for a harmonic reducer flexible gear made of an SNCM439 material, belongs to the technical field of long-service-life manufacturing of harmonic reducers, and solves the problem that the service life of the harmonic reducer flexible gear is short. According to the method, a flexible gear made of an SNCM439 material is subjected to a composite heat treatment method of secondary normalizing, quenching, deep cooling and tempering, and the specific process method is as follows: the primary normalizing temperature is 870-890 DEG C, the heat preservation time is 50-70 minutes, and air cooling is performed; the secondary normalizing temperature is 850-870 DEG C, the heat preservation time is 50-70 min, and air cooling is carried out; the quenching temperature is 830-850 DEG C, the heat preservation time is 50-70 min, and oil cooling is conducted; the subzero treatment temperature is-70 DEG C to-90 DEG C, and the heat preservation time is 110-120 min; the tempering temperature is 490-510 DEG C, and the heat preservation time is 120-140 minutes.

The invention discloses an ejector pin anti-fatigue strengthening method based on multi-section variable-temperature treatment, and relates to the technical field of ejector pin anti-fatigue strengthening, and the ejector pin anti-fatigue strengthening method comprises the following steps: austenitizing high-temperature quenching: heating an ejector pin to an austenitizing temperature, and then carrying out zoned cooling on the ejector pin; medium-temperature tempering and thermal-state mechanical strengthening are conducted, specifically, the ejector pin is tempered at the medium-temperature tempering temperature, and thermal-state shot blasting or laser shock is conducted on the ejector pin in the heat preservation period or after heat preservation is completed; intermediate low-temperature plasma nitriding: carrying out plasma nitriding in a nitrogen-hydrogen gas environment; subzero treatment: placing the ejector pin in liquid nitrogen; and finally, low-temperature tempering and cold-state mechanical strengthening are conducted. Through multi-section temperature gradient treatment, phase change distribution control over different temperature sections is achieved, too high internal stress and brittleness generated by one-time quenching are avoided, sudden size change and hot cracks induced by phase change are prevented, a controllable surface-core hardness and toughness gradient is formed, the surface crack initiation tendency is reduced, and the surface quality is improved. And the consistency and controllability of anti-fatigue basic conditions are improved.

The invention is suitable for the technical field of cleaning of large-scale offshore wind power equipment, and particularly relates to a cleaning device and method for paint and rust removal of large-scale offshore wind power equipment, and the cleaning device for paint and rust removal of large-scale offshore wind power equipment comprises an ice particle forming device used for generating ice particles and conveying the ice particles to the outside; the output end of the air treatment device communicates with the ice particle forming device, and the air treatment device is used for conducting impurity removal and refrigeration treatment on external environment air and conveying the external environment air into the ice particle forming device; the output end of the water treatment device is communicated with the ice particle forming device, and the water treatment device is used for conveying water into the ice particle forming device after pressurizing and pre-cooling treatment; and the cleaning transmission device is connected to one side of the ice particle forming device and used for controlling the ice particle output position of the ice particle forming device. According to the device, ice making and jet flow are synchronously carried out, the effect of rapidly, stably and continuously making ice particles is achieved, and the cost is greatly reduced.

The invention provides a high-carbon-chromium bearing ring structure property distribution control method, relates to the technical field of bearings, and aims to solve the problem that the structure property requirement of a high-carbon-chromium bearing steel precision bearing cannot be well met in the related technology. The control method comprises the steps that overall quenching treatment is conducted on the first side and the second side of the bearing ring; gradient tempering heat treatment is conducted on the first side of the bearing ring, so that a tempering gradient temperature field is constructed on the radial wall thickness of the bearing ring, and a heat source is transmitted to the second side from the first side in a heat conduction mode; and performing cold treatment on the first side and the second side of the bearing ring. According to the method, it can be guaranteed that the quenched working face has enough retained austenite with the high carbon content, so that the working face has high heat stability and mechanical stability after gradient tempering and stable heat treatment, and asynchronous transformation of the retained austenite in the radial direction of the bearing ring is achieved; and the differentiated requirements of the raceway working surface and the radial whole on the retained austenite content are effectively met.

The invention provides a temperature control system and a temperature control method. The system comprises a refrigerating device and a circulating device. The refrigerating device comprises a compressor, a heat accumulator, a condenser, an evaporator and a supercooling liquid accumulator; the circulating device comprises circulating liquid driving equipment and a heat exchanger; for the refrigerating device, the temperature can be increased through the heat accumulator in the temperature increasing process, so that the temperature increasing speed is increased; the supercooling liquid storage device carries out supercooling treatment on the refrigerant and stores the refrigerant, and cooling can be carried out through the supercooling liquid storage device in the cooling process, so that the cooling speed is increased; for the circulating device, in the heating and cooling process, factory service water of the heat exchanger can conduct preposed heating and cooling on circulating liquid firstly, and the heating and cooling speed is further increased. Therefore, under the condition that the power of the compressor, the condenser and the evaporator does not need to be increased, the heating and cooling waiting time is shortened, the production efficiency is improved, energy is saved, consumption is reduced, the equipment production cost is reduced, and equipment miniaturization is facilitated.

The utility model discloses a seamless stainless steel tube heat treatment device, which relates to the technical field of stainless steel tube heat treatment, and comprises a base, the top of the base is fixedly connected with a support frame, the front side of the support frame is fixedly connected with a first motor, and the bottom of the support frame is movably connected with a transmission mechanism. A heating mechanism is connected to one side of the top of the base in a penetrating mode, and a clamping mechanism is fixedly connected to the other side of the top of the base. The solar panel of the heating mechanism supplies power to the heating wire at the top, so that the temperature of the heating wire rises, the transported stainless steel pipe is heated at high temperature, the heat degree can be controlled through the solar panel, the device is more convenient to use, a second motor can drive a second telescopic rod in the second motor to drive a cold treatment plate to be pushed towards one side, and the cold treatment efficiency is improved. And the stainless steel pipe is clamped by the cold treatment plate, so that the device can abrade a connecting interface of the stainless steel pipe, the device is more delicate in machining, manual operation is reduced, and the device is more convenient to machine.

The invention belongs to the field of fish genetic breeding, and discloses a method for efficiently obtaining homozygous red crucian carp, which comprises the following steps: (1) carrying out artificial false fertilization on eggs of the red crucian carp to obtain fertilized eggs; (2) performing gene editing on the fertilized eggs; (3) incubating the fertilized eggs subjected to gene editing for 18-32 minutes, and then carrying out cold treatment; and (4) incubating the fertilized eggs after cold treatment to obtain the homozygous red crucian carp. According to the method disclosed by the invention, gene editing and gynogenesis methods are comprehensively utilized, the hatching rate, the survival rate and the homozygous rate are high while the high gene editing efficiency is maintained through the early cold shock treatment time and the proper cold shock treatment time, and the gynogenesis red crucian carp mutant with a high proportion can be obtained.

The invention discloses a heat exchange structure and equipment, and relates to the technical field of heat conduction. When the heat exchange structure is used, an object needing to be subjected to heat treatment or cold treatment is placed on the base plate, then the second side of each lower plate is connected with the temperature source module, in each temperature conduction unit, heat or cold in the temperature source module is transmitted into the corresponding lower plate, and the heat or cold in the corresponding temperature source module is transmitted into the corresponding lower plate; heat or cold is conducted to the first sides of the lower plates and the joints of the first sides of the upper plates through the lower plates, then the heat or the cold is transferred to the upper plates from the joints, and the heat or the cold is transferred to the substrate through the upper plates. According to the heat exchange structure, heat exchange can be achieved, the temperature field is homogenized, and the risk that heat stress of an object subjected to heat treatment or cold treatment is not uniform is reduced.

The invention relates to the technical field of remanufacturing, in particular to an undercarriage lug surface damage laser additive repairing method which comprises the steps that a damaged undercarriage lug part is subjected to magnetic powder or dye penetrant inspection to determine a damaged area and is polished; preparing powder for laser additive repair by adopting a vacuum induction melting inert gas atomization process; the powder prepared in the second step is used, and mobile laser cladding equipment is adopted for conducting cladding repairing on the grinding area; laser shock strengthening is conducted on the part repairing area; whether the repaired area is 0.1 mm higher than the surface of the lug part or not is tested; preparing a cooling solution from ethanol and liquid nitrogen for cold treatment; the repaired connecting lug part is polished and finely trimmed, so that the size of the part meets the use requirement; using magnetic powder or dye penetrant inspection to confirm that the repaired area has no crack; and preparing a test piece to verify the repair effect. According to the method, the problems of conventional micro-arc deposition, long welding repair period and reduced shaping caused by the long welding repair period are solved.

The utility model discloses a kind of steel wire surface coating machines, belong to coating machine technical field, including box, the front end surface of box is rotatably provided with swing door, surface of swing door is through and is provided with air hole, the inside fixed setting of air hole has first filter screen, the left side top of box is fixedly installed with control panel, the inside of box is sequentially provided with coating cavity, heat treatment cavity and cold treatment cavity from left to right by multiple partition plates, second guide hole is communicated and is opened between coating cavity and heat treatment cavity.The utility model through the structural design of first filter screen, air hole, second filter screen, through slot, fan, support plate, third filter screen, fixed cavity, air pump, pipe, spray head, air inlet, heating block, fourth filter screen and air outlet, can be realized to be convenient for steel wire to be heated and dried, it can be realized to be convenient for steel wire after heat drying treatment to be cold treated simultaneously, so heat stress can be eliminated, and then the overall quality and durability of coating are improved.

The present application relates to anthocyanin extraction technical field, disclose a kind of berry anthocyanin extraction equipment and extraction method, extraction equipment includes: extraction machine, the working area of extraction machine is provided with fruit juice cold filtering mechanism, for cold treatment berry and realize efficient extraction;Fruit juice cold filtering mechanism includes four vertical setting mid vertical tube, cloth bag and supply suction liquid component;Wherein: four mid vertical tubes are fixed in matrix in the center position of extraction machine working area, form stable support structure;Mid vertical tube top and limiting disc form rigid connection, bottom is fixedly arranged bottom disc by welding mode;Supply suction liquid component is connected with four mid vertical tubes;Limiting disc is rotatably provided with bevel gear disc outside by bearing assembly, form rotary drive structure;The present application is by setting fruit juice cold filtering mechanism, using 0 to 5 ℃ low temperature extraction liquid and pure water form high pressure cold vortex flow, while physically crushing berry, effectively avoid the damage of high temperature to anthocyanin activity.

1. The name of the product of this design: liquid nitrogen freezing equipment. 2. Purpose of the product with this appearance design: The product with this appearance design is used for raw and cold treatment of workpieces. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

The invention relates to a method for improving the particle size distribution concentration ratio of a rare earth oxide abrasive, which comprises the following steps: firstly, mixing water, a rare earth oxide, a dispersing agent and a pH regulator to obtain first slurry; then, carrying out first sanding treatment on the first slurry to obtain second slurry; then, mixing the second slurry and a wetting agent, and carrying out hot-cold alternate treatment to obtain third slurry; and finally, the third slurry is subjected to second sanding treatment, the rotating speed of the second sanding treatment is smaller than that of the first sanding treatment, and the rare earth oxide grinding material is obtained. According to the method provided by the invention, the particle size distribution concentration ratio of the abrasive can be effectively improved, input of external energy is reduced, energy consumption can be reduced, and industrial application is facilitated.

The utility model discloses a cooling water recovery and reuse system, comprising a sealed water tank, on which a steam condensate input pipe and a steam condensate output pipe are connected, the steam condensate output pipe is connected to a first sealed water pump, the output end of the first sealed water pump is connected to a mechanical sealed water cooling part of a moving device through a pumping water pipe, the output end of the mechanical sealed water cooling part of the moving device is connected to a first heat exchanger through a water guide pipe, and the output end of the first heat exchanger is connected to the sealed water tank through a return pipe; the beneficial effects of the utility model are as follows: by recovering the steam condensate into the sealed water tank for temporary storage, and transporting it to a number of moving devices for water cooling treatment through the first sealed water pump, the steam condensate is recovered and reused, the waste of water resources is avoided, and the production and operation cost investment of the enterprise is reduced.

The present invention discloses a motor rotor cryogenic treatment device and its application in rotor cold assembly, specifically relates to the field of motor assembly technology, including a cryogenic treatment box, a material taking port is opened on the top of the cryogenic treatment box, and a driving mechanism is arranged inside the cryogenic treatment box, which is used to rotate with a cryogenic medium during cryogenic treatment. The present invention sets a driving mechanism and a temperature treatment mechanism, so that each temperature treatment mechanism can drive the corresponding rotor workpiece to rotate, so that the cryogenic treatment medium can be evenly sprayed on the rotor workpiece to increase the contact area and contact time between the cryogenic medium and the rotor surface, so that the temperature distribution on the rotor surface is uniform, avoiding the uneven distribution of additional stress on the material due to uneven temperature distribution, and avoiding the deformation of the rotor due to the rapid change of temperature during the cryogenic treatment process, which affects its dimensional accuracy and shape.

A local temperature control device for cold treatment plants relates to the field of plant local cold treatment and comprises a box body and a floating plate, vertical pipes are vertically arranged at four corners of the box body, the lower ends of the vertical pipes are connected with the bottom end face in the box body, ice blocks and water are contained in the box body, at least two cross rods are arranged at the lower end of the inner wall of the box body, and the floating plate is arranged on the box body. A simple and efficient cooling device is constructed through cooperative use of the box body, the floating plate, the vertical pipe and the transverse rod, in actual operation, a user can put ice blocks into the box body and inject a proper amount of water to form an ice-water mixture at the temperature of 0 DEG C, then the transverse rod is used for stably pressing the floating ice blocks, and therefore the ice blocks can be cooled conveniently. The method comprises the following steps of: fixing a plant part to be experimented on a floating plate, and enabling the plant part to be experimented to be in full contact with ice water at the temperature of 0 DEG C, so that a cold stress environment of the plant can be effectively simulated, and a cold stress experiment on the plant is realized.

The utility model discloses a cooling device for metal surface heat treatment, which relates to the technical field of metal surface cold treatment and comprises a cooling box and a drying box arranged on one side of the cooling box, a through groove is arranged at the joint of the cooling box and the drying box in a penetrating manner, and an inlet and an outlet are respectively arranged on two opposite sides of the cooling box and the drying box. A conveying belt is arranged in the through groove; a cold air plate and a spray pipe are sequentially arranged at the top of the interior of the cooling box from top to bottom in the length direction; an air cooler and a suction pump are arranged at the top of the cooling box; the output end of the air cooler is communicated with the cold air plate through a pipeline; pipelines at the input end and the output end of the suction pump are respectively communicated with the lower part of the outer wall of the cooling box and the spray pipe; the drying box is provided with an upper air distribution plate and a lower air distribution plate; the cooling function is achieved, water drops on the metal surface are easily dried, the practicability of the device is improved, and waste of water resources is reduced.

The invention provides a bovine semen freezing preservation method, and relates to the technical field of semen freezing. The bovine semen freezing preservation method mainly comprises the following steps: mixing folic acid, lycopene, anthocyanin and anethene for feeding in the earlier stage of cattle, manually collecting semen, adding caffeine, dendrophenol, chlorogenic acid and pinoresinol diglucoside into a basic semen diluent, diluting the bovine semen, pre-cooling the diluted bovine semen, and freezing the pre-cooled bovine semen. And finally, carrying out low-temperature treatment on the precooled seminal fluid and then carrying out liquid nitrogen freezing. The defects in the prior art are overcome, the influence of freezing on the activity of the bovine semen can be effectively reduced, the motility activity and plasma membrane integrity of the frozen bovine semen are guaranteed, and a good foundation is provided for bovine breeding work.

This invention discloses a method for dynamic monitoring of dissolved oxygen and identification of oxidation risks throughout the entire fermentation process of specialty berry wines. For seven berry species—blueberry, raspberry, mulberry, blackberry, black chokeberry, red dragon fruit, and blackcurrant—dissolved oxygen data is systematically collected at 13 key stages, including crushing, fermentation, filtration, fining, aging, cold treatment, and bottling, to create a "dissolved oxygen dynamic spectrum" for each variety. By analyzing the peak dissolved oxygen levels and their rates of change, crushing, fining, cold treatment, and bottling are identified as four high-risk oxidation stages. Furthermore, based on the rate of dissolved oxygen decrease after crushing, the seven berry species are categorized into three types: oxidation buffering, oxidation consuming, and rapid oxygen consuming. This invention achieves a multi-variety, full-chain systematic assessment of oxidation risks, providing a quantitative basis for precise oxidation control in specialty berry wines.

The invention discloses a rosa roxburghii tratt residue and pulp separating device in the technical field of rosa roxburghii tratt processing equipment.The rosa roxburghii tratt residue and pulp separating device comprises a rack, the rack is provided with a pretreatment box, a squeezing box and a treatment box with the bottom open, the pretreatment box comprises a hot water cavity and an ice water cavity, a first air cylinder is fixedly arranged at the top of the rack, and a second air cylinder is horizontally and slidably connected to the top of the rack; the first air cylinder drives the second air cylinder to slide, the movable end of the second air cylinder is fixedly provided with a loading frame, and the loading frame is provided with a discharging door. The pretreatment device is connected with a pipeline for discharging materials towards the treatment box, the treatment box is horizontally and slidably connected with the rack, the rack is provided with a third air cylinder for driving the treatment box to slide left and right, and bristles are fixedly arranged on the portion, located in the treatment box, of the rack. According to the scheme, the rosa roxburghii tratt is subjected to hot water and cold water alternate treatment, so that fruit thorns become soft in the hot and cold treatment process, the fruit thorns on the rosa roxburghii tratt are prevented from being intertwined in the rosa roxburghii tratt rolling process, and the rosa roxburghii tratt is prevented from being agglomerated.

The utility model discloses a cold treatment device for kirschwasser production, which relates to the technical field of kirschwasser production and comprises a treatment tank, four fixing sleeves in an annular array are fixedly mounted on the outer surface of the treatment tank, a pre-cooling cylinder is fixedly mounted in each fixing sleeve, and the pre-cooling cylinders are fixedly mounted on the outer surface of the treatment tank. The bottom end of each precooling cylinder is fixedly communicated with a water inlet pipe, and a communicating pipe is arranged outside the treatment tank. According to the cold treatment device for kirschwasser production, by arranging the conveying pipe, wine liquid subjected to cold treatment is conveyed into the treatment tank, in the conveying process, cold water is introduced into the communicating pipe, so that the cold water enters the four pre-cooling barrels and the spiral pipe, heat exchange and pre-cooling are conducted on materials in the conveying pipe through the cold water in the four pre-cooling barrels, and the cold treatment effect is improved. Therefore, the materials can be cooled more quickly after being conveyed into the treatment tank, continuous heat exchange treatment is carried out through cold water in the spiral pipe and the materials, and the cold treatment effect of the device can be improved.

The utility model discloses a blow-drying device for cold treatment of a roller, which comprises a shell, support legs are welded at four corners of the bottom end of the shell, a first support frame and a second support frame are sequentially and fixedly connected to the top end of the shell, a water cooling fan is clamped in the first support frame, an air cooler is clamped on the second support frame, and the water cooling fan is connected with the air cooler. A cooling conveying device is arranged below the first supporting frame, so that the roller can be completely immersed in cooling liquid in the shell to be conveyed, waste of the cooling liquid is avoided, uniform cooling of the roller is achieved, and continuous and efficient cooling treatment is achieved under the assistance of a water cooling fan. The residual cooling liquid on the surface of the roller soaked and cooled through the cooling liquid is drained in time, surface moisture blow-drying is achieved in the blow-drying step of the air cooler, and the overall cooling efficiency of the roller is improved.

This utility model discloses a flue gas carbon dioxide membrane adsorption purification device, relating to the field of carbon dioxide membrane adsorption technology. The utility model includes a cold treatment structure comprising a membrane adsorption purification cylinder, a second mixing cylinder connected to the membrane adsorption purification cylinder via a pipe, a first mixing cylinder connected to the second mixing cylinder via a pipe, a pre-cooling cylinder located on one side of the first mixing cylinder, a cooling cylinder and a drying cylinder located below the pre-cooling cylinder and connected via a pipe, a liquid nitrogen tank located in front of the cooling cylinder, a spiral tube connected to the output end of the liquid nitrogen tank and spirally distributed inside the cooling cylinder, a desiccant located inside the drying cylinder, and an air inlet pipe connected to the pre-cooling cylinder and the first mixing cylinder; and a mixing structure comprising an installation shaft located inside the first mixing cylinder and multiple sets of stirring rods arranged in a ring array inside the first mixing cylinder. This utility model, by setting a cold treatment structure, solves the problem that polymer membranes are easily deformed by heat during carbon dioxide membrane adsorption purification, affecting the stability of membrane adsorption purification.

The present invention discloses a cryogenic method, a cryogenic system and a product obtained by improving the service life of the valve box at the hydraulic end of a fracturing pump, and belongs to the field of alloy technology. The present invention hoists a precipitation-hardened stainless steel valve box that has undergone fine processing into a cryogenic system; after sealing, dry ice is injected at a flow rate of 0.5~1.0 L / s, and after the injection of dry ice, the stop valve is closed and the pressure is maintained for 1~3 hours; finally, the valve box is disassembled and processed for storage. The present invention has a simple process, a small amount of cryogenic treatment materials, and a low cost; it can significantly reduce the content of inverted austenite produced by the "solid solution + aging" heat treatment, and improve the hardness and strength of the material with a thickness of about 1~3 cm in the inner cavity of the valve box; a large residual compressive stress is generated on the surface of the inner cavity of the valve box, while improving the roughness of the surface of the inner cavity of the valve box and reducing stress concentration; after the above-mentioned cryogenic treatment, the service life of the valve box fracturing operation is significantly improved.

1. The name of the product of this design: Nitrogen refrigeration equipment (flat cabinet right angle). 2. Purpose of the product with this appearance design: The product with this appearance design is used for raw and cold treatment of workpieces. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the key points of the design: Design 1 Stereoscopic drawing 1. 5. Designate Design 1 as the base design.

The present application relates to the field of illumination and modified atmosphere combined preservation technology, and discloses a method for preserving litchi and maintaining Vc of litchi by using LED illumination combined with modified atmosphere packaging. The method comprises the following steps: picking fresh litchi, immediately screening out litchi without disease and insect pests and mechanical damage, retaining complete fresh branches and leaves, and precooling the screened litchi; after the precooling of the litchi, the dry end of the litchi is immersed in a nutrient supplement hydrogel, the litchi is placed flat, is packaged by using a fruit and vegetable film, and a slow-release antibacterial sheet is arranged inside; the packaged litchi is placed in a thermostat with an ambient temperature of 4-10 DEG C and a humidity of 85-95% for preservation, and the illumination intensity of white light or red and blue light is 70-90 μmol·m ‑2 ·s ‑1 The present application uses red and blue light combination, white light illumination to promote photosynthesis to form an internal microcirculation system for low-temperature storage for the first time to preserve litchi, effectively prevents loss of nutritional ingredients, and can also increase the vitamin C content of litchi to a certain extent.

The utility model discloses a heat conduction roller with uniform heat distribution, and belongs to the technical field of heat conduction rollers. The device mainly comprises a heat-conducting roller; the heat conduction part is suitable for heat conduction of a heat conduction roller, and the heat conduction part comprises a conduction pipe which is arranged inside the heat conduction roller; the flow dividing sleeve is arranged in the heat conducting roller, and a flow dividing pipe is arranged on the flow dividing sleeve; the fixing assembly is used for connecting the conduction pipe and the shunt pipe; the auxiliary stabilizing assembly is used for conducting auxiliary fixing on the conduction pipe. According to the heat conduction roller with the uniform heat distribution, heat conduction oil or cooling liquid is guided in through the heat conduction component, so that the heat conduction oil or the cooling liquid is subjected to circulation operation, conduction is conducted through the heat conduction component, the heat conduction roller is heated or cooled, and therefore heat treatment or cold treatment on materials through the heat conduction roller is achieved; therefore, the application range of the heat-conducting roller is widened.

The invention belongs to the technical field of refrigerator fault detection, and particularly relates to a refrigerator electromagnetic valve fault detection method and system and a server. The method comprises the steps that the working state of the defrosting heater is obtained, wherein the working state comprises a starting state and a stopping state; when it is monitored that the working state of the defrosting heater is switched from the starting state to the stopping state, first temperature data are obtained, and the first temperature data are temperature data of an evaporator; according to the first temperature data, it is determined that defrosting treatment of the refrigerator is finished; responding to the end of defrosting treatment of the refrigerator, and controlling the refrigerator to execute refrigeration treatment; second temperature data are obtained, wherein the second temperature data are temperature data of the refrigeration evaporator within a preset time period from the first starting moment of self-made cold treatment; and the fault state of the electromagnetic valve is judged according to the second temperature data. The problem of fault misjudgment of the electromagnetic valve caused by frost blockage interference is avoided, and the accuracy and reliability of fault detection of the electromagnetic valve of the refrigerator are improved.