40results about How to "Extend freshness" patented technology

The invention discloses a master batch with a food fresh-keeping function. The master batch comprises the following components: 40-80 parts of PE resin; 5 to 30 parts of a nano composite antibacterial agent; 0.1 to 5 parts of a surfactant; 2-10 parts of a polyolefin elastomer; 5-25 parts of an organic gas adsorption material; 5-20 parts of a microporous modified atmosphere material; 1-25 parts of an antifogging agent; 0.1 to 10 parts of a lubricant; 0.1-5 parts of a dispersant; 0.1 to 1 part of an antioxidant; 0.1 to 3 parts of absolute ethyl alcohol; and 80 to 300 parts of ultrapure water. The master batch with the food fresh-keeping function has a broad-spectrum antibacterial effect, can reduce the rotting rate, the weight loss rate and the loss rate of fruits and vegetables in the production circulation link, adsorbs organic gas generated by respiration of the fruits and the vegetables, spontaneously adjusts the gas concentration content, and prolongs the fresh-keeping time and the shelf life of the fruits and the vegetables.

The utility model discloses a portable filtering oxygenation device based on ultramicro nano bubbles. A portable filtering oxygenation device based on ultramicro nano bubbles comprises at least one purifying cabin, a water inlet and a water outlet far away from the water inlet are formed in the purifying cabin, a plurality of filtering plates with through holes are arranged in the purifying cabin in the water flow direction, the purifying cabin is divided into a plurality of purifying cavities by the filtering plates, and the purifying cavities are communicated with the water inlet and the water outlet. A filter piece is arranged in each purification cavity; the oxygenation cabin is detachably connected with the purification cabin in a sealed mode, the oxygenation cabin is provided with an ultra-micro nano bubble generating device, and the ultra-micro nano bubble generating device is provided with a liquid inlet, an air inlet and a nozzle; a bubble release opening is formed in the oxygenation cabin; and the liquid inlet is connected with the water outlet. The ultramicro nano-bubble generating device can generate a large number of ultramicro nano-bubbles, the ultramicro nano-bubbles can stay in water for a long time, the concentration of dissolved oxygen in water is rapidly increased, the water quality is improved, and the stability of the dissolved oxygen degree and the water quality in a water tank and a culture pond is guaranteed.

The invention relates to the field of food processing, and discloses a fresh-keeping processing method of green bamboo shoots, which comprises the following steps: S1, cleaning collected green bamboo shoots: firstly, manually cleaning impurities on the surfaces of the bamboo shoots, and then carrying out secondary cleaning by using a sodium hypochlorite solution with the concentration of 0.02-0.05%; s2, grading and classifying the cleaned green bamboo shoots according to the appearance color and the tenderness degree; s3, the bamboo shoots are properly aired, ultraviolet rays are used for disinfecting the operation environment, 75% ethyl alcohol is used for spraying treatment on the operation contact surface, and a disinfected cutter is used for removing pollution wounds of the green bamboo shoots. Through manual cleaning and secondary cleaning of the bamboo shoots with a 0.02-0.05% sodium hypochlorite solution, ultraviolet sterilization and disinfection of operation surfaces and tools with 75% ethanol are combined, microorganisms and impurities are effectively removed, the risk of wound pollution is reduced, the wound is soaked with a fresh-keeping solution and packaged with a double-layer paper bag, the fresh-keeping effect is enhanced, the moisture loss of the bamboo shoots is reduced, and the quality of the bamboo shoots is improved. And a plurality of defects of the traditional method are improved.

The present invention belongs to the technical field of food additives, and specifically discloses a high-purity naked oat β-glucan and a preparation method and application thereof. The high-purity naked oat β-glucan is extracted by enzyme-assisted water extraction and alcohol precipitation, and the extract has the function of maintaining moisture stability in cereal products and improving water holding capacity. The high-purity naked oat β-glucan extraction of the present invention is obtained by pretreatment, hot water extraction, enzyme-assisted removal of starch and protein, freeze drying to obtain crude polysaccharides, and crude polysaccharide purification; the example of making cereal bread proves that the high-purity naked oat β-glucan can significantly improve the water holding capacity of cereal products and prolong their shelf life, and can be used in bread, biscuits, and meal replacements to achieve its high-value application.

The utility model belongs to the technical field of experimental equipment, and provides an environment-adjustable fresh-keeping device, which comprises a control console, a fresh-keeping box, a fresh-keeping box and a fresh-keeping box, the fresh-keeping box is internally provided with at least two layers of storage cavities, the front side of the fresh-keeping box is provided with a transparent window, and the transparent window is provided with a pick-and-place blocking window movably connected with the transparent window; the side box is provided with a refrigerating mechanism and a humidifying mechanism, and the refrigerating mechanism and the humidifying mechanism both communicate with the storage cavity; and an air inlet end is arranged in the storage cavity. The environment-adjustable fresh-keeping device is simple and compact in structure, the fresh-keeping time of fruits and vegetables can be prolonged, the fresh-keeping effect of the fruits and vegetables is improved, meanwhile, the research cost of fresh-keeping experiments of the fruits and vegetables is effectively reduced, experiments of the same experiment environment or different environment conditions can be carried out on different fruits and vegetables, the experiment efficiency is improved, and the experiment cost is reduced. And closed-loop feedback regulation and control is adopted for regulation and control of the fresh-keeping environment, accurate regulation and control of the fresh-keeping environment conditions are guaranteed, and therefore the accuracy and reliability of regulation of the fresh-keeping environment are improved.

The present invention belongs to the technical field of biological preservatives, and specifically relates to a double-coated nanoemulsion of clove essential oil, which comprises clove essential oil, ε-polylysine, whey protein, lecithin, and corn starch. The present invention also provides a preparation method of the nanoemulsion and its use as a donkey meat preservative. The double-coated nanoemulsion of clove essential oil of the present invention not only retains the excellent properties of the original nanoemulsion, but also slows down the increase of pH value, the proliferation of microorganisms, and the oxidation of lipids and proteins to a certain extent, and greatly prolongs the shelf life.

The freeze-free slurry black fish fillet processing production line of the present invention is sequentially provided with a bleeding and cutting operation table, a fish scale removal machine, a bone removal and slicing operation table, an automatic slicer, an ozone water treatment device, a pickling tank, a cleaning table and a frequency conversion rolling and kneading machine, and the freeze-free slurry black fish fillet processing production method of the present invention is simple to operate and has high work efficiency. Compared with the prior art, the production line and production method of the present invention can efficiently produce freeze-free slurry black fish fillets, and the prepared fish fillets are white and bright, delicious and odorless, tough and have a long shelf life.

The present invention relates to a method for freezing and refrigerating chestnut kernels for preservation, and the specific method includes: sterilizing the chestnut kernels with a composite specific bactericide in coordination with slightly acidic electrolyzed water after pre-treatment of the chestnut kernels, then color-protecting the chestnut kernels with L-cysteine ​​in combination with cold shock treatment, and finally slightly freezing and air conditioning after treating the chestnut kernels with chitosan coating. The present invention uses a specific bactericide needle combined with the synergistic effect of slightly acidic electrolyzed water to completely kill the pathogenic bacteria of chestnuts during storage; L-cys is used to change the molecular spatial structure of PPO that causes browning during chestnut kernel storage, thereby achieving the purpose of inhibiting PPO activity; a microenvironment with high CO2 and low O2 is formed on the surface of the fruit by using a chitosan coating treatment method, and combined with cold shock treatment, the respiration intensity can be reduced to inhibit the activity of PPO polyphenol oxidase and POD peroxidase, while also inhibiting the activity of PAL phenylalanine ammonia lyase, thereby reducing the synthesis of phenolic substances.

The invention discloses a harmful gas remover for vegetable cold storage based on zeolite, comprising a box body, an air guide channel is arranged in the box body, air inlet fans and exhaust fans are arranged at both ends of the air guide channel respectively, a plurality of columnar filter material modules, a first sterilization module, a second sterilization module and a plurality of honeycomb filter material modules are sequentially arranged along the air guide channel in the box body, the air guide channel comprises a plurality of air guide pipes and a plurality of conical air guide covers, the large end of the conical air guide cover covers the air outlet side of the module, and the small end is connected to the air guide pipe or the exhaust fan, the air guide pipe runs through the center of the module to the air outlet side of the module; electric valves are installed in the air guide pipes passing through the center of the module; the air guide pipes on the front side of the air inlet side of the module are provided with reversing devices, and the reversing devices comprise a plurality of valve sheets hinged to the air guide pipe; the invention can realize the access selection of the filter material module through the air guide reversing structure, and is suitable for the use of various types of vegetable cold storages; it is convenient for the centralized removal of harmful gases in different cold storages, and the use is flexible and convenient.

The utility model discloses a kind of display cabinets for food sales, including main body, closed mechanism, extension mechanism and display mechanism, the closed mechanism includes closure door and locking piece, the extension mechanism includes extension rod and positioning piece, the display mechanism includes show stand and display lamp, under the mutual cooperation of above mechanism, the device can avoid food exposed in air, prevent dust, bacteria, insect pollution, improve health safety, thereby prolong the fresh-keeping time of food, reduce waste, in addition, the device increases the effective display area of display cabinet, it is especially useful when large or food variety, temporarily expand space, no additional equipment is needed, high flexibility.

The utility model discloses an externally-hung type gas adjusting device which comprises a heat preservation box, a containing frame is fixedly arranged on the rear side of the heat preservation box, gas adjusting equipment is arranged on the upper end face of the containing frame, two sliding plates are fixedly arranged on the outer wall of the containing frame, and two sliding blocks are symmetrically arranged on the outer wall of the gas adjusting equipment. A threaded knob is arranged on the outer side of the sliding plate and fixedly connected with a threaded rod, a gas outlet pipe is arranged on the upper end face of the gas adjusting equipment, an adjusting assembly is fixedly arranged at the upper end of the gas outlet pipe, the adjusting assembly comprises a limiting plate, a rotating disc and a limiting check block, and the rotating disc is arranged above the limiting plate; six guide rods are arranged in the rotating disc, one end of each guide rod is connected to the upper end of a limiting check block, the lower end of each limiting check block is arranged on a limiting plate, the gas adjusting equipment can be rapidly disassembled and assembled, the gas conveying amount can be controlled according to the temperature change condition in the heat preservation box, and practicability is achieved.

The present invention discloses a fully automatic aquatic aquaculture ecological purification system and an operation control method. The system includes a breeding pool, a sewage pool and a pipeline for connecting the breeding pool and the sewage pool. The sewage pool is connected to a sewage main pipeline. The fully automatic aquatic aquaculture ecological purification system also includes a purification pool. The purification pool is connected to the sewage pool and an automatic micro-filtration device is provided on the communication channel between the two. A graded filtration group is connected between the purification pool and the breeding pool. The breeding pool and the graded filtration group are connected through a reflux pipeline. A backwash sewage pipeline is connected between the graded filtration group and the sewage main pipeline. The present invention filters and purifies the water in the breeding pool through multiple purification methods and returns it to the breeding pool, thereby increasing the fresh-keeping time of the water under the premise of controlling the introduction of external water. The present invention can reversely flush the filtering device in the system to discharge the dirt intercepted by the filter in time, which not only improves the water purification efficiency, but also greatly reduces manual cleaning, saving time and labor.

The present invention belongs to the technical field of liquid storage equipment, and in particular to a storage device, which includes: a container; an adjusting member, including an air guide tube and a piston, the piston including a sealing ring and a float nested in the sealing ring; a plug, which is inserted into the opening at the top of the air guide tube and linked with the float, and can drive the float to rise when the plug rotates in a predetermined direction; when the air guide tube drives the piston to move downward, a gap is formed between the sealing ring and the float, and the gas can be discharged through the gap; when the float moves to contact the liquid in the container, the outer peripheral side wall of the float is tightly attached to the sealing ring, and when the exhaust is completed and the plug rotates in a predetermined direction, the float rises, and the outer peripheral side wall of the float is further tightly attached to the sealing ring. After the exhaust is completed, the plug is inserted and rotated, and the plug can drive the float to rise, thereby making the float and the outer sealing ring closer, so that the liquid in the container is isolated from the air, slowing down the liquid deterioration process, and achieving a better anti-oxidation effect.

The utility model belongs to the technical field of articles for daily use, and particularly relates to a multipurpose ice-making box, which comprises a box body, a box cover and an ice grating plate, an ice crystal box with a built-in coolant is detachably connected to the inner side of the box cover, the ice crystal box is positioned above the ice grating plate, an air outlet hole is arranged on the box cover, and a plug and a plug for opening the air outlet hole are detachably connected to the box cover. The food preservation box is long in preservation time and can be placed in a microwave oven to heat food.

The utility model discloses an air duct assembly and storage equipment, and belongs to the technical field of refrigeration. The air duct assembly comprises an inner container, a shell and a temperature sensing element, the shell is installed in the inner container and forms a ventilation channel and a storage cavity, the ventilation channel is provided with an air return opening, and the air return opening is used for communicating the ventilation channel with the storage cavity; the temperature sensing element is arranged in the ventilation channel and is adjacent to the air return port. The temperature sensing element is placed in the ventilation channel and is close to the air return port, so that the influence on the temperature measurement accuracy of the temperature sensing element due to the fact that articles are placed in the storage cavity can be avoided, the refrigeration effect is guaranteed, and the preservation time is prolonged as much as possible.

The utility model discloses a constant temperature distribution box relates to vegetables distribution technical field, aims at solving when distribution box is placed in outside environment, and the cold storage agent in the box can gradually melt, leads to heat to be unable to be delivered to the cold source depth efficiently, finally leads to the whole constant temperature performance to be not good, effective fresh -keeping time shortening's problem. Its technical scheme main points are: including the box with the side plate, the fixed connection with having a plurality of exhaust holes's fixed sheet of box inner wall, is installed between fixed sheet and the fan of box bottom. The utility model discloses a fan, gas pipe, the setting of heat conduction sheet, to this realizes the effect of the air in the box to carry out self -circulation, exports the hot gas in the box and converts into the cold gas again and then sends back to the box, realizes the temperature in the box always keeps low -temperature state, improves the constant temperature effect of distribution box, improves the fresh -keeping time of vegetables.

The utility model relates to the technical field of storage, in particular to an apple layered storage device which comprises a storage rack, baffles are arranged on the left side and the right side of the storage rack, anti-skid blocks are welded to the middles of the inner sides of the baffles, handles are arranged on the outward sides of the baffles, and waterproof plates are connected to the inward sides of the bottom ends of the baffles. A base plate is installed on the upper surface of the waterproof plate, a storage box is placed on the upper surface of the base plate, ventilation holes are formed in the bottom of the storage box, grooves are formed in the two sides of the storage box, storage covers corresponding to the grooves are arranged above the storage box, and bosses matched with the grooves are arranged at the two ends of each storage cover. By arranging the layered structure, the panes of different sizes and the foams in the panes, due to the fact that apples are different in size, the apples are placed in the panes of the corresponding sizes according to needs, the space utilization efficiency is improved, the situation that the apples are damaged due to collision and extrusion in the transportation process can be avoided through the foams, and the integrity of the apples in the transportation process is guaranteed.

The utility model discloses a fresh-keeping function fresh oyster logistics packing box relates to logistics packing box technical field, including packing box body, clamping structure and stacking structure, packing box body top is provided with the box cover, is provided with the clamping structure between packing box body and the box cover, packing box body inner bottom end is rotatingly connected with threaded rod, and the threaded rod is rotatingly connected with the packing box body bottom end. A second guide rod is fixedly connected to the bottom end in the packaging box body; according to the fresh-keeping device for the fresh oysters, tight clamping connection of the packaging box body and the box cover is completed through the arrangement of the clamping connection structure, air is prevented from entering the box body, and therefore the humidity and temperature of the environment in the box are better kept, and the fresh-keeping time of the fresh oysters is prolonged; according to the device, a plurality of storage boxes are stacked and stored through the arrangement of the stacking structure, the internal space of the packaging box is fully utilized, each storage box can be effectively fixed through the cooperation of the supporting plates and the grooves, toppling in the stacking process is prevented, and accumulated water in the storage boxes can be conveniently drained through the design of drainage pipes and control valves.

The invention discloses a production technology of instant macaroni, relates to the technical field of flour product production, and aims to improve the taste of macaroni and prolong the preservation time of the macaroni. Main components in the formula comprise high gluten flour, quinoa flour, chickpea powder, egg white and the like, the raw materials are uniformly mixed, water is gradually added to form smooth dough, and the compactness and viscoelasticity of the dough are enhanced through dough kneading and vacuum treatment; then the dough is extruded into the tubular macaroni, the key is that the macaroni is flatly laid and naturally placed for shaping, the extrusion shape of the macaroni is fixed, the ripening degree and the water content of the product are controlled through precooking and drying, the taste is ensured, and the shelf life is prolonged; the dried macaroni is subjected to cooling and vacuum packaging, so that the preservation time of the macaroni is effectively prolonged; the instant macaroni solves the problems that existing instant macaroni is too thick in pipe wall, has multiple cracks and bubbles and contains too many additives and preservatives, and the finished product quality of the instant macaroni is improved and the preservation time of the instant macaroni is prolonged on the premise that the preservatives are not used.

The invention provides a tremella aurantialba sourced fruit and vegetable fresh-keeping agent as well as a preparation method and application thereof, and belongs to the technical field of fruit and vegetable fresh-keeping agents. In the invention, the tremella aurantialba sporocarp is subjected to ultrasonic extraction with water, and then alcohol precipitation and drying are performed to obtain the tremella aurantialba-derived fruit and vegetable fresh-keeping agent disclosed by the invention. When fruits and vegetables are soaked in an aqueous solution of the tremella aurantialba sourced fruit and vegetable preservative, the preservation time and the storage period of the fruits and vegetables can be prolonged, the loss rate is reduced, the shelf life of the fruits and vegetables is prolonged, and economic benefits are improved. The fruit and vegetable fresh-keeping agent has the advantages of easily available raw materials, simple preparation method, natural components and no chemical residue, accords with the concept of green and pollution-free, and is suitable for large-scale popularization and application.

The embodiment of the application belongs to the technical field of packaging bags, and relates to a food packaging bag, which comprises an outer bag and an inner bag. The outer bag is a breathable bag, and the inner bag is a sealed bag. The inner bag is arranged in the outer bag and detachably connected with the outer bag through a first connecting structure. The technical scheme provided by the application can help better realize food preservation.

The utility model relates to the technical field of fresh-keeping equipment, in particular to an electromagnetic coupling super-ice-temperature preservation box with an in-situ monitoring system, which solves the problem that a worker does not know whether a preserved article is deteriorated or not in the prior art and comprises a box body, and a box cover is movably connected to the top of the box body. An electric field generating assembly, a magnetic field generating assembly and a temperature adjusting assembly are arranged in the box body, and an in-situ monitoring assembly is further arranged in the box body. The device has the beneficial effects that the electric field generating assembly is used for generating an alternating electric field to play a role in precooling the interior of the box body; the magnetic field generating device can generate a magnetic field, the magnetic field enables water molecules to be directionally arranged, mutual contact among the water molecules is reduced, and the effect of inhibiting generation of ice crystals is achieved, so that the supercooling point of food is reduced, and the supercooling degree of the food is improved; the temperature adjusting assembly is used for reducing the temperature of the space in the box body and achieving super-ice-temperature preservation. The in-situ monitoring assembly is used for monitoring the quality of food, and the problem that food deterioration cannot be found in time is avoided.

The utility model relates to the technical field of wild mushroom processing, in particular to a freezing fresh-keeping device for wild mushroom processing, a fresh-keeping assembly is installed in a fresh-keeping cabinet, an adjusting assembly is installed at the position, corresponding to the fresh-keeping assembly, of the outer portion of the fresh-keeping cabinet, and the fresh-keeping assembly comprises an intelligent cabinet installed at the bottom in the fresh-keeping cabinet; an ozone generation box is fixedly installed at the top of the fresh-keeping cabinet, an ozone generator is arranged in the ozone generation box, an ozone pipe is installed at the air outlet end of the ozone generator, a one-way valve pipe is installed in the middle section of the outer portion of the ozone pipe, and drawing storage boxes are slidably connected to the interior of the fresh-keeping cabinet at equal intervals. According to the freezing fresh-keeping device for wild mushroom processing, the whole device can utilize ozone as a strong oxidant, the sterilization and deodorization functions and effects are obvious, the reaction is rapid, secondary pollution is avoided, the fresh-keeping effect of wild mushrooms is effectively improved, the practicability of the whole device is improved, and better use prospects are brought.

The invention discloses a fruit and vegetable biological fresh-keeping agent, and belongs to the technical field of fruit and vegetable fresh-keeping, and the fruit and vegetable biological fresh-keeping agent is prepared from the following components: chitosan, a citrus extract, galactomannan, an elaeagnus angustifolia flower fermentation extract and water. The elaeagnus angustifolia flower fermentation extract is prepared by the following steps: crushing elaeagnus angustifolia flowers, adding the crushed elaeagnus angustifolia flowers into a liquid culture medium, uniformly mixing, sterilizing, cooling, inoculating lactobacillus reuteri for anaerobic fermentation, inoculating paenibacillus polymyxa for aerobic fermentation, collecting fermentation liquor after the fermentation is finished, filtering and sterilizing by using a microfiltration membrane, and concentrating under reduced pressure to obtain the elaeagnus angustifolia flower fermentation extract. The components of the fruit and vegetable biological fresh-keeping agent are all from pure natural bio-based raw materials, and the fruit and vegetable biological fresh-keeping agent does not contain any chemical product, so that secondary pollution to fruits and vegetables is effectively avoided, the fruit and vegetable biological fresh-keeping agent has an excellent fresh-keeping effect, can obviously prolong the fresh-keeping time of the fruits and vegetables, does not influence the mouth feel of the fruits and vegetables, and is green, safe and convenient to use.

This utility model discloses a portable leek harvesting basket, including a harvesting basket body and a collection basket. The upper perimeter of the harvesting basket body contacts the lower perimeter of the collection basket. A fixing block is installed on the right side of the lower end of the harvesting basket body. Telescopic automatic adjustment rods are installed on the front and rear sides of the upper end of the fixing block. The beneficial effects of this utility model are: the combination design of the telescopic automatic adjustment rod and the universal wheels allows for flexible height adjustment according to user needs and easy movement, reducing the intensity of manual handling. It is especially suitable for harvesting operations in large-scale leek planting bases, greatly improving transportation efficiency. The precise fitting structure of the positioning groove and the positioning base, combined with the fixed connection method of the mounting block, ensures that the harvesting basket body, collection basket, universal wheels, and other components are firmly connected, without loosening or shaking during movement and loading, effectively preventing leek spillage and loss. The protective baffle forms a lateral barrier to prevent leeks from falling due to collision during transportation.

The invention discloses a complex microbial inoculant and application of the complex microbial inoculant in prevention and treatment of citrus diseases and postharvest preservation. The complex microbial inoculant provided by the invention contains purpureocillium lilacinum and curcumin, and can effectively prevent and treat orange diseases and fungal diseases after fruit picking; when curcumin is independently used, no bacteriostatic effect is achieved, after the purpureocillium lilacinum and curcumin are compounded, the inhibiting effect of the purpureocillium lilacinum on citrus canker germs, penicillium italicum and penicillium digitatum can be further enhanced, and the synergistic interaction effect is achieved. Meanwhile, the composite microbial agent can prolong the refreshing time of the picked oranges and reduce the morbidity of green mold and green mold of the picked oranges, has preservative and fresh-keeping effects, is applied to the storage and transportation of the picked oranges as a preservative or preservative, not only widens the application of the purpureocillium lilacinum, but also improves the preservation effect after the purpureocillium lilacinum is combined with curcumin. Citrus diseases can be better prevented and treated, postharvest preservation of fruits can be better achieved, and more methods and products are provided for citrus planting and postharvest disease prevention and treatment.

The present invention provides an agricultural product quick-freezing device, comprising: a quick-freezing chamber, wherein a conveyor belt is arranged in the quick-freezing chamber, and the conveyor belt is a tubular conveyor belt; and a temperature regulating mechanism, wherein the temperature regulating mechanism is connected to the quick-freezing chamber or the conveyor belt. The agricultural product quick-freezing device provided by the present invention provides a conveyor belt as a tubular conveyor belt and a temperature regulating mechanism, and the temperature regulating mechanism can provide cold or heat for the quick-freezing chamber, so that the wax layer crystallization can be effectively inhibited during the quick-freezing and fresh-keeping process of the agricultural products, thereby preventing the wax layer from falling off, and prolonging the fresh-keeping time of the agricultural products.

The invention relates to the technical field of soy sauce bottles, and discloses a double-channel fresh-keeping soy sauce bottle based on a blow molding method and a blow molding method thereof.The double-channel fresh-keeping soy sauce bottle comprises a bottle body, a storage mechanism is arranged in the bottle body and comprises an inner bag, a bottle plug is installed at the top of the inner bag, and the storage mechanism enables soy sauce not to make direct contact with the bottle body through the inner bag; a double-valve mechanism is arranged on the bottle plug, the double-valve mechanism comprises a silica gel breather valve and a silica gel retaining valve, and the double-valve mechanism controls the sealing performance of the bottle body and the inner bag through the silica gel breather valve and the silica gel retaining valve. The bottle body and the inner bag are separately treated, so that soy sauce is independently stored in the inner bag, the inner bag is kept closed when the bottle body and the inner bag are controlled to recover air pressure through the silica gel breather valve and the silica gel retaining valve, air is effectively prevented from entering the inner bag, and then the soy sauce is kept fresh, and use of preservatives is avoided.

The invention discloses a composite biological fresh-keeping agent for penaeus vannamei boone. The composite biological fresh-keeping agent is prepared from three biological fresh-keeping agents including tremella polysaccharide, Nisin and lysozyme, and water. The composite biological fresh-keeping agent is prepared from the following components in percentage by mass: 0.6% of tremella polysaccharide, 0.6% of vitamin C, 0.6% of vitamin C and the balance of water, wherein the total amount is 100% and the unit is g / ml; the content of the Nisin is 0.03%; the content of the lysozyme is 0.05%; and the balance of water. The composite preservative disclosed by the invention has the capabilities of resisting oxidation, destroying a microbial structure and inhibiting enzyme activity, so that the effects of preserving freshness and inhibiting blackening are achieved, and compared with a single biological preservative, the composite preservative disclosed by the invention is more remarkable in preservation effect.

The utility model provides an air curtain cabinet with a humidifying function, which comprises a cabinet body, a controller is arranged on the cabinet body, a plurality of layers of partition plates are arranged in the cabinet body, sensor matrixes are arranged on the partition plates, and the sensor matrixes are arranged along the direction perpendicular to the inner wall of the cabinet body and are respectively and electrically connected with the controller. A plurality of atomization nozzles are installed above the partition plate, the atomization nozzles are arranged on the inner wall of the cabinet body and are in one-to-one correspondence with the sensors, electromagnetic valves are arranged on the atomization nozzles, the electromagnetic valves are electrically connected with the controller, a water supply tank is arranged on one side of the cabinet body, a water pump is arranged in the water supply tank, and the water pump is electrically connected with the controller. The water pump is communicated with the atomization nozzles through a water pipe and electrically connected with the controller, when fruits and vegetables are placed on the partition plate and a signal of the sensor is cut off, the controller controls the atomization nozzles in the cut-off area to conduct regular spraying, and the fresh-keeping time of the fruits and vegetables is prolonged.