110 results about "Modified atmosphere" patented technology

The invention discloses an intelligent modified atmosphere packaging film with gas selectivity and pH / humidity double response as well as a preparation method and application of the intelligent modified atmosphere packaging film. The preparation method comprises the following steps: mixing thymol emulsion and graphene oxide dispersion liquid, and stirring and reacting at room temperature in a dark place to prepare graphene oxide-thymol; the preparation method comprises the following steps: dissolving chitosan in an acetic acid aqueous solution, then adding graphene oxide-thymol and a plasticizer, and carrying out ultrasonic dispersion treatment to form a film-forming solution; and carrying out film forming treatment on the film forming solution by adopting a casting method to prepare the intelligent modified atmosphere packaging film with gas selectivity and pH / humidity double response. The prepared intelligent modified atmosphere packaging film can be modified automatically, is uniform and stable in structure, high in encapsulation efficiency, close in coordination, good in antibacterial and antioxidant activity and excellent in mechanical property and gas barrier property, can realize selective adsorption of gas, controls release of thymol by responding to changes of the pH value and humidity in the environment, and has a good application prospect. The method has a good application prospect in the field of fruit and vegetable preservation.

The invention discloses a modified atmosphere preservation system and method, and aims to improve the preservation suitability of vegetables of different categories and different maturity degrees. The modified atmosphere preservation system comprises a refrigeration house, the in-warehouse sensing unit is used for collecting environmental data in the refrigeration storage in real time; the outside-refrigeration-house sensing unit is used for collecting outside-refrigeration-house environment data in real time; the respiration rate prediction unit performs fruit and vegetable respiration rate prediction calculation according to the environmental data in the refrigeration house; and the set point vector calculation unit is used for performing system energy consumption prediction calculation based on the cold storage external environment data and the cold storage internal environment data, performing optimal solution calculation of the comprehensive optimization index according to an energy consumption prediction calculation result and a fruit and vegetable respiration rate prediction calculation result, and performing optimal solution calculation of the comprehensive optimization index according to an optimal solution calculation result of the comprehensive optimization index. Outputting an optimal environment parameter set point vector; the decoupling compensation unit is used for performing error calculation according to the in-library environment data and the optimal environment parameter set point vector; and the PID control unit is used for generating a control signal according to an error calculation result.

The invention relates to the technical field of fresh-keeping packaging of brasenia schreberi tender shoots, in particular to a fresh-keeping packaging method and system for brasenia schreberi tender shoots. The method comprises the following steps: pretreating brasenia schreberi tender shoots to induce pore closing of the brasenia schreberi tender shoots; performing glue protection treatment to form a composite glue protection film on the surfaces of the tender shoots; loading the treated brasenia schreberi tender shoots into a tender shoot packaging box integrated with a controlled atmosphere microcapsule release unit, and sealing, so as to realize shape integrity preservation of the brasenia schreberi tender shoots; sequentially carrying out water bath and ultrahigh pressure sterilization on the sealed tender shoot packaging box; and finally, refrigerating to realize fresh-keeping packaging of the brasenia schreberi tender shoots. On the basis of a box body structure of a multi-layer composite structure, in cooperation with an inner wall anti-sticking design and a built-in controlled atmosphere microcapsule release unit system, morphological integrity preservation of brasenia schreberi tender shoots is achieved, non-acidification and chemical preservative-free high-quality preservation can be achieved in combination with glue protection treatment and gradient physical sterilization of the brasenia schreberi tender shoots, and the preservation effect of the brasenia schreberi tender shoots is improved. And the colloid retention rate is greater than 95%.

The invention relates to the technical field of vegetable preservation, and discloses a broccoli intelligent storage and preservation environment control system, which comprises an intelligent management system, and is characterized in that the intelligent management system comprises a storage environment control module, an online multi-mode quality detection module, an analysis feedback module, an intelligent decision execution unit and an early warning reminding module; the online multi-mode quality detection module, the analysis feedback module, the intelligent decision execution unit and the execution mechanism are integrated to construct a set of complete fresh-keeping feedback control ring, and meanwhile, key indexes such as mildew, water loss rate, color, ethylene concentration and the like can be subjected to automatic online full detection; differentiated fresh-keeping measures such as precise humidity and temperature adjustment, modified atmosphere packaging and isolation treatment are automatically triggered based on the judgment result, the conventional extensive management mode depending on manual spot check and passive response is changed, problems can be found in real time and actively intervened in the storage process, loss is reduced, and the shelf life is prolonged.

The invention provides a bean product freshness-locking manufacturing process using liquid nitrogen. The bean product freshness-locking manufacturing process comprises the following steps: (1) pretreatment; (2) liquid nitrogen rapid cooling; (3) temperature balancing; and (4) packaging and refrigerating. The bean products are treated through the composite fresh-keeping liquid in the pretreatment stage, surface microorganisms of the bean products can be effectively inhibited, a foundation is laid for follow-up steps, in the follow-up treatment process, the bean products are quickly frozen through liquid nitrogen, the bean products can be quickly cooled, and glassy ice layers are formed on the surfaces of the bean products, so that the bean products are quickly preserved. Oxygen is physically isolated, moisture is locked, and meanwhile, the cooling rate is accurately controlled, so that tiny and uniformly distributed ice crystals and fixed microstructures are formed in the bean product, and a protein network structure in the bean product is not damaged, so that the problems of juice loss and texture collapse after unfreezing are solved; finally, a stable and low-oxygen storage environment is provided, long-acting preservation of bean products can be achieved, and the quality can be kept.

The utility model relates to the technical field of packaging machines, and provides a film tensioning device of a modified atmosphere packaging machine, which comprises a packaging table, one end of the top of the packaging table is screwed with a wind-up roll, the other end of the top of the packaging table is screwed with a conveying roll, and one end of the wind-up roll is welded with a driving rod; according to the film tensioning device of the modified atmosphere packaging machine, a gear motor is pushed outwards through an electric push rod, then a driving rod and a driving pipe are separated, a winding roller stops winding, when the driving pipe moves outwards, a first connecting rod drives a second connecting rod to be bent, the second connecting rod drives a push plate to move backwards, and after a transverse rod loses supporting of the push plate, the winding roller is driven to rotate. And when the vertical rod moves downwards, the top plate moves synchronously, so that the rubber block is attached to the top of the conveying roller to press a thin film on the conveying roller, the situation that the conveying roller rotates continuously due to inertia, the thin film is sent out, and the thin film is loose is avoided, and the packaging quality is improved.

The invention belongs to the technical field of food packaging materials, and discloses a photodynamic antibacterial modified atmosphere film as well as a preparation method and application thereof. The antibacterial modified atmosphere membrane is obtained by drying a membrane casting solution, the membrane casting solution comprises the following components in percentage by mass: 80-95% of anionic waterborne polyurethane emulsion, 5-20% of cationic quaternized nanocellulose and an antibacterial agent inclusion compound which accounts for 1-10% of the total mass of the components, and the antibacterial agent inclusion compound is a curcumin-cyclodextrin inclusion compound. The transparent film which has good compatibility and obviously improved air conditioning performance and mechanical performance is successfully prepared, the film has excellent antioxidant and photodynamic antibacterial functions, and the defect that an existing film is single in function is overcome. When the functional waterborne polyurethane film is applied to strawberry preservation, the oxidation and corruption process of strawberries is effectively delayed, the purpose of prolonging the preservation period is achieved, reliable support is provided for preparation of the functional waterborne polyurethane film and food preservation application, and the functional waterborne polyurethane film has important theoretical and practical significance.

The utility model discloses a spontaneous type modified atmosphere packaging for strawberry fresh -keeping, including the packing box of no lid and the food packaging bag of covering in packing box outside, packing box long 16~20cm, wide 11~15cm, high 3~5cm, and the both ends of food packaging bag are sealed, and at least one opening is arranged on the surface, and the total area of opening is 3~5cm 2 , and the opening is covered by PDMS film. The utility model overcomes the problems of poor fresh -keeping effect of the prior art strawberry packaging and the problems of complex operation and high cost of active type modified atmosphere packaging.

The utility model belongs to the technical field of food packaging, and particularly relates to a nuclear track membrane spontaneous type controlled atmosphere patch for fresh keeping of a fruit and vegetable box and the fruit and vegetable box. The spontaneous controlled atmosphere patch of the nuclear track membrane for fresh keeping of the fruit and vegetable box comprises a nuclear track membrane layer, an inner protection layer and an outer protection layer are arranged on the two sides of the nuclear track membrane layer respectively and are of a net structure, a plurality of annular adhesive layers are arranged on the side, away from the nuclear track membrane layer, of the inner protection layer, and the outer protection layer is arranged on the side, away from the nuclear track membrane layer, of the outer protection layer. Each annular adhesive layer is a single adhesive layer, each single adhesive layer is made of the same adhesive, and adjacent single adhesive layers are made of different adhesives. The modified atmosphere patch is of a three-layer structure, so that the refreshing time of fruits and vegetables can be prolonged; the fruit and vegetable box adhesive has a good bonding effect with various fruit and vegetable boxes made of different box materials, and is convenient and fast to use.

The utility model relates to the technical field of psychotherapy, in particular to a feeding device of a modified atmosphere packaging machine, which comprises a base, an operating platform is fixed at the top of the base, a top plate is fixed at the output end of a third cylinder through a bolt, and a first mounting groove is fixed at the top of a packaging equipment main body through a bolt. The two sides of the interior of the first mounting groove are each provided with a first air cylinder, the output ends of the two first air cylinders are each fixedly provided with a supporting sliding block, the bottom ends of the two supporting sliding blocks slidably extend out of the interior of the first mounting groove, and the bottoms of the two supporting sliding blocks are each fixedly provided with a second air cylinder; the output end of the second air cylinder is fixedly provided with a driving assembly, and two clamps are movably installed below the driving assembly. According to the packaging box clamping and discharging device, the packaged packaging box can be clamped and discharged, so that a packaging film is prevented from being torn, and the situation that the packaging film is damaged is avoided.

The invention discloses a modified atmosphere packaging machine with a novel replacement structure, a lower die is located right below a laminating heat-sealing cutting mechanism, and the lower die comprises a hollow lower die base, a gas replacement structure plate, a connecting plate and a packaging box tray; the gas replacement structural plate is fixed to the upper end of the lower die base and provided with a plurality of die cavities which correspond to the heat-seal cutting devices in position one to one and are used for containing packaging boxes, the feeding side edge of each die cavity is provided with a multi-angle gas inlet structure, and the discharging side edge of each die cavity is provided with a gas outlet. The connecting plate is located below the lower die base and fixedly connected with the rack, the packaging box tray is arranged in the lower die base and fixedly connected with the connecting plate through a support, at least one air cylinder is fixed to the lower end face of the connecting plate, and telescopic rods of the air cylinders are fixedly connected with the lower die base. Multi-angle gas injection replacement is adopted, dead angles are avoided, gas in the packaging box is replaced more thoroughly, and the replacement precision and replacement efficiency of the gas in the packaging box are remarkably improved.

This invention discloses a method for extending the storage time of peaches, a composite plasma-activated water system, and a preservation system, belonging to the field of post-harvest preservation of fruits and vegetables. The method uses a quaternary gas mixture of argon, oxygen, carbon dioxide, and helium to prepare plasma-activated water through discharge. A specific ratio of tea polyphenols and chitosan is then added to obtain composite plasma-activated water. Combined with gentle pre-cooling, light-protected ultrasonic atomization spraying, and modified atmosphere buffering, this achieves a synergistic effect of antibacterial activity, water retention, antioxidant properties, and flavor preservation. This method can reduce the total bacterial count, rot rate, and weight loss rate of peaches during storage, maintain fruit firmness, enhance the activity of endogenous antioxidant enzymes, reduce malondialdehyde accumulation, and effectively retain soluble solids and titratable acids, among other flavor compounds. The process of this invention is green and mild, with no chemical residues, and can delay flesh softening and peel browning, thus extending the storage time and shelf life of peaches.

The invention relates to a method and device for performing ripening control on fruits and vegetables based on an air-conditioned cold storage, and the method comprises the steps: obtaining an input ripening control instruction; different ripening modes correspond to different target parameters; generating a corresponding ripening control mode based on the ripening control instruction; and executing each ripening control stage based on the ripening control mode, and obtaining a real-time state vector of the fruits and vegetables in the corresponding ripening control stage, so as to determine whether to adjust an instruction in the regulation and control instruction set to adjust the environment parameter preset track based on a comparison result of the real-time state vector and the target state vector. Therefore, ripening control of fruits and vegetables is realized. By means of the control method and device, the problem that in the prior art, due to the fact that an air-conditioned cold storage adopts fixed gas parameters and control strategies, differentiated requirements of users cannot be met is solved.

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 application discloses a nuclear pore membrane modified atmosphere packaging device production system, which comprises a mother piece feeding mechanism, a nuclear pore membrane cutting mechanism, a sub piece feeding mechanism and a multiple-speed chain conveying line. The automatic feeding of the mother piece and the sub piece is realized through the mother piece feeding device and the sub piece feeding device, and the automatic cutting of the nuclear pore membrane during the assembling process of the nuclear pore membrane and the sub piece is realized through the nuclear pore membrane cutting device. The overall assembling of the nuclear pore membrane modified atmosphere packaging device is realized to be automatic, the working efficiency of the assembling is obviously improved, and the qualified rate of the finished product is improved.

This utility model relates to the technical field of fresh-keeping storage boxes, and discloses a foldable fresh-keeping container for modified atmosphere storage of lychees. It includes a lid, a box body slidably connected to the lower surface of the lid, and symmetrically arranged air inlets and outlets inside the box body. Connecting block one and connecting block two are fixedly connected to one side of the outer wall of the box body. A lead screw is rotatably connected to the inner wall of connecting block one and connecting block two, and a limiting block is threaded to the outer wall of the lead screw. A telescopic assembly is provided inside the box body; the telescopic assembly includes a second tension tube, a first telescopic rod, and a second telescopic rod. The outer wall of the second tension tube is fixedly connected to the inside of the box body, and one end of the first telescopic rod is fixedly connected to the inner wall of the box body. In this utility model, when telescopic folding is required, the first and second tension tubes can support telescopic folding, and the first and second telescopic rods provide internal support and fixation. The first telescopic rod compresses and tightens the first telescopic spring inside the second telescopic rod.

1. The name of the design product: portable air-conditioning fresh-keeping packaging box. 2. The use of the design product: packaging box for containing melons, fruits and vegetables, etc. and playing the role of air-permeable fresh-keeping. 3. The design points of the design product: in shape. 4. The picture or photo best indicating the design points: perspective view. 5. Other circumstances needing to be explained: the two hole positions in the left view and the right view are air film holes.

1. The name of the design product: vacuum air conditioning packaging machine. 2. The use of the design product: vacuum air conditioning packaging for products. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model relates to the field of fresh-keeping of fresh and wet potato vermicelli, and discloses air-adjusting fresh-keeping equipment for fresh and wet potato vermicelli, which comprises an air-adjusting fresh-keeping packaging rack and a packaging film arranged on the right side of the air-adjusting fresh-keeping packaging rack, and a packaging table is arranged at the top end of the middle of the air-adjusting fresh-keeping packaging rack. A pre-storage assembly is arranged at the top end of the packaging table and comprises a moving table, dovetail blocks are fixedly connected to the front surface and the rear surface of the moving table, and storage racks are fixedly connected to the left side and the right side, close to the packaging table, of the middle of the air-adjusting fresh-keeping locking packaging rack. According to the utility model, the storage racks are arranged on the two sides of the packaging table to construct a cyclic operation mode of a pre-feeding station and a packaging station, so that the filling of the next batch of vermicelli can be completed during modified atmosphere packaging, and after packaging is completed, the packaged mobile table can be quickly moved out, and the mobile table to be processed can be quickly loaded without stopping the machine to wait for manual feeding and discharging; and the continuity and the overall packaging efficiency of the production line are improved.

Sliced ready-to-eat meat are provided by slicing ready-to-eat meat, disposing the meat into a flexible pouch with a modified atmosphere, and sealing the flexible pouch containing the meat. The flexible pouch is formed from material having: i) a thickness of from about 0.2 mils to about 2 mils; ii) an MVTR of about 1.2 g / 100 in2 / 24 Hrs @ 100° F., 90% RH, 1 atm or less; iii) an 02 Gas Transmission Rate of about 0.8 cc / 100 sqin / day or less at 1 atmosphere, 0% relative humidity and 73° F. or less; and iv) a clarity of about 80% or greater.

This invention discloses a non-thermal sterilization and flavor preservation process for pre-prepared wild vegetable dishes, relating to the field of food processing technology. The process includes: sequentially subjecting the wild vegetable raw materials to acidic plasma-activated water baths and alkaline plasma-activated water baths, with both baths supplemented by ultrasonic treatment; subsequently, acidic plasma-activated water nano-atomization treatment; followed by low-temperature vacuum impregnation and low-temperature vacuum dehydration; after seasoning and mixing, a three-layer edible coating film is formed on the surface, comprising a chitosan layer, a nanocellulose layer, and a chitosan layer containing plant essential oils; finally, modified atmosphere packaging and storage and transportation under cold chain conditions. This invention, through stepwise treatment of acidic activated water sterilization and alkaline activated water enzyme inactivation, combined with atomization supplementary sterilization, flavor impregnation, microcapsule sustained release, and multi-layer coating, improves the microbial safety and flavor quality preservation of pre-prepared wild vegetable dishes without the addition of preservatives.

The invention provides a dynamic balance controlled atmosphere fresh-keeping system and method for a refrigerator, and the system comprises a box body which is internally provided with a dynamic controlled atmosphere chamber; the multi-dimensional sensing module and the gas management module are arranged in the dynamic air conditioning chamber; the multi-dimensional sensing module is configured to obtain door body opening and closing data of the box body; the controller is connected to the multi-dimensional sensing module and the gas management module, and the controller is configured to determine the air intrusion amount by using an air intrusion amount model based on the door body opening and closing data; and based on the air invasion amount, the gas management module is used for maintaining the oxygen concentration in the dynamic air-conditioning chamber within a set range, and the pressure difference between the interior of the dynamic air-conditioning chamber and the exterior of the refrigerator body is maintained within a set pressure difference range, so that the problem that according to an existing air-conditioning fresh-keeping method of the refrigerator, high vacuum in the refrigerator body is maintained or high-purity nitrogen is continuously filled into the refrigerator body, and the refrigerator body cannot be kept fresh is solved. And the refrigerator is complex in structure, high in cost and large in energy consumption.

The invention provides a modified atmosphere preservation method of ottelia acuminata and preserved ottelia acuminata. The preservation method comprises the following steps: S1, a pretreatment step: pretreating ottelia acuminata to obtain a pretreated material; s2, a packaging step: putting the pretreated material into a packaging body, and sealing the packaging body; and S3, a modified atmosphere fresh-keeping step: inputting fresh-keeping gas into the packaging body in which the materials are packaged so as to obtain a fresh-keeping ottelia acuminata product. According to the modified atmosphere preservation method, the quality of the ottelia acuminata in the storage period is greatly improved, the relatively green color is kept, the relatively low relative electric conductivity is kept, the increase of the total number of bacterial colonies is inhibited, and the shelf life of the ottelia acuminata is prolonged.

A method of manufacturing a modified atmosphere packaging (MAP) container, comprising forming a molded fiber structure from a slurry comprising a biodegradable fibrous product and water, forming a multi-layered peelable liner having a defined number of layers that are concomitantly layered in a predefined sequential configuration, wherein a plurality of polyamide (PA) layers and an ethylene vinyl alcohol (EVOH) layer are sandwiched between a first set of polyethylene (PE) layers and a second set of PE layers, and removably attaching the multi-layered peelable liner on the molded fiber structure to form the MAP container.

This utility model discloses a modified atmosphere container humidifier, including an outer shell. A water tank is located on the bottom inner side of the outer shell. Guide rails are symmetrically arranged on both sides of the inner wall of the water tank. A mounting bracket is slidably connected inside the guide rails. A sealing gasket is placed between the mounting bracket and the guide rails. A coarse filter screen is located on the top of the mounting bracket, and a filter element is located on the bottom of the mounting bracket. A handle is fixedly connected to one side of the mounting bracket, and two positioning grooves are symmetrically arranged on the side of the mounting bracket near the handle. This utility model ensures that excess water flows back into the water tank when water is supplied to the wet membrane body. The coarse filter screen and filter element work together to ensure the cleanliness of the returned water, preventing pipe blockage. After the humidifier has been used for a period of time, pulling the handle allows the mounting bracket to move the coarse filter screen and filter element out of the water tank, facilitating cleaning of the coarse filter screen and replacement of the filter element, thus ensuring the overall filtration effect.

1. Name of the designed product: packing machine (high speed air conditioning). 2. Use of the designed product: packing and sealing goods, etc. 3. Design points of the designed product: in shape. 4. Picture or photo showing the design points: perspective view.

The invention relates to the technical field of cold region fruit preservation, and particularly discloses a vacuum pre-cooling air-conditioning preservation method suitable for cold region fruits, which comprises the following steps: in a historical vacuum pre-cooling air-conditioning preservation database, obtaining monitoring data of various types of cold region fruits, screening out monitoring data with uneven cooling, and storing the monitoring data in a database; integrating to obtain a cold region fruit cooling non-uniform data set, analyzing temperature distribution differences of different types of cold region fruits in the vacuum pre-cooling process, confirming cooling non-uniform types, constructing a vacuum pre-cooling parameter regulation and control system according to the cooling non-uniform types, monitoring the temperature field of each region in real time during regulation and control, and if new temperature differences are caused to other regions, determining the cooling non-uniform data set; if not, performing cooling non-uniform regulation and control, based on a regulation and control result, generating a cold region fruit vacuum pre-cooling exclusive fresh-keeping scheme, outputting a parameter standardization template, inputting the parameter standardization template into an air-conditioning fresh-keeping control system, and performing self-adaptive regulation and control on different batches of cold region fruits, thereby being beneficial to solving the problem that the fresh-keeping effect of different batches of cold region fruits is unstable.

The invention provides a packaging material with a modified atmosphere effect as well as a preparation method and application of the packaging material. The preparation method of the packaging material comprises the following steps: firstly, preparing HMSM, carrying out amination modification on the HMSM, preparing a toughening and anti-reflection agent PLBI-co-HMSM, and modifying PLLA / PBAT by utilizing the PLBI-co-HMSM and Ag < + >, so as to prepare a degradable material with a modified atmosphere function; results show that the introduction of PLBI-co-HMSM improves the mechanical and gas permeability of the PLLA / PBAT, and compared with the PLLA / PBAT, the elongation at break and the gas permeability of the modified film are improved by 81% (longitudinal), 195% (transverse), 130.2% (O2) and 125.4% (CO2). The modified film better maintains the gas atmosphere in the package, and plays a better role in maintaining the hardness, Vc and titratable acid change of the fruits.

The application belongs to the technical field of food processing, and discloses a preparation process and a synergistic regulation method of quick-frozen egg tarts, which comprises the following steps: a. selecting egg tart liquid raw materials, and preparing a targeted modified egg tart liquid through step-by-step dissolution, two-stage homogenization and segmented pasteurization; b. sending pre-prepared flaky puff pastry into an adjustable precision mold and a vacuum suction device to complete shape pressing and molding; c. completing quantitative and accurate filling of tart liquid through a high-precision filling pump and a flow regulating valve; d. completing gradient baking and curing of the egg tarts; e. completing gradient humidity control and anti-condensation cooling, controlling the temperature and relative humidity of the cooling environment in a process, and completing directional cooling of the egg tarts; f. completing modified atmosphere packaging of the cooled egg tarts in a ten-thousand-level clean environment; g. controlling the temperature and wind speed of the quick-freezing environment in a process, completing temperature-controlled freezing of the egg tarts, and directionally regulating the generation size and distribution of ice crystals in the freezing process; and after batch verification and metal detection, the egg tarts are stored in a warehouse, and finally, high freeze-thaw stability quick-frozen egg tart products are obtained.

The invention discloses fruit and vegetable modified atmosphere packaging equipment based on a plasma technology and a fresh-keeping method. The method comprises the following steps: pre-cooling fruits and vegetables, and putting the pre-cooled fruits and vegetables into a packaging bag with a one-way valve; oxygen, carbon dioxide and nitrogen are mixed according to a specific proportion through a gas distribution system; introducing the mixed gas into a plasma generating device to generate low-temperature plasma; and finally, injecting the plasma gas into a packaging bag to finish modified atmosphere packaging. According to the method, modified atmosphere packaging and plasma sterilization are combined, respiration of fruits and vegetables can be effectively inhibited, enzyme activity can be reduced, microorganisms can be killed, the fresh-keeping period is prolonged, and the quality is kept. The equipment for realizing the method comprises a gas distribution system for mixing gas; the plasma generation device is communicated with the gas distribution system and is used for converting the mixed gas into low-temperature plasma; the air blowing gun is used for injecting the plasma gas into the packaging bag; and the control device is used for controlling the operation of the whole equipment. The equipment is high in integration level, convenient to operate and suitable for household and industrial production.