138 results about "Controlled atmosphere" patented technology

The invention discloses a fresh commodity after-ripening regulation and control planning method oriented to maturity grading, and relates to the technical field of food science and biologication.The method comprises the steps that physiological parameters of fresh commodities are collected in real time based on a multi-modal sensor, and the physiological parameters comprise the epidermis pigment content, the ethylene release rate, the fruit hardness and the respiration intensity; the collected physiological parameters are input into a multi-objective optimization model based on deep learning, the model fuses a metabolic kinetic equation and an LSTM time sequence prediction algorithm, and a regulation and control parameter combination adaptive to the current mature stage is output; according to the regulation and control parameter combination, the temperature, the relative humidity and the O2 / CO2 concentration gradient of the controlled atmosphere storage equipment are synchronously regulated through a distributed control system, and a plant hormone antagonist is injected through an ultrasonic atomization device; and constructing a supply chain collaborative network based on a block chain technology, binding a grading result with logistics path planning, and adjusting a temperature control strategy and a shelf life countdown parameter of the cold chain transport vehicle in real time through an edge computing node.

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 of vegetables and fruits, in particular to an air-conditioned storage and fresh-keeping method of tomatoes. The method comprises the following steps: ventilating and pre-cooling tomatoes, fumigating with 1-methylcyclopropene gas, and fumigating with ozone every 2-6 days after fumigating with the 1-methylcyclopropene gas. The tomatoes are treated through ozone in combination with 1-methylcyclopropene, the freshness and quality of the tomatoes can be kept for a long time, and the shelf life of the tomatoes is remarkably prolonged.

The invention belongs to the technical field of fresh keeping, and discloses a high-maturity small white apricot ethylene regulation and dynamic controlled atmosphere synergistic fresh keeping method which comprises the following steps: after packaging by a special net cover, pre-cooling in time, and synchronously carrying out 1-MCP fumigation and stage I controlled atmosphere treatment; a refrigerator car transportation or common car heat preservation and cold storage transportation mode is adopted, and stage II controlled atmosphere treatment is synchronously carried out in the logistics link; transferring into a modified atmosphere packaging box of which the inner surface is covered with a photocatalytic fresh-keeping coating, entering a goods shelf, and synchronously carrying out stage III modified atmosphere treatment. According to the invention, a synergetic technology of ethylene dynamic control and self-adaptive adjustment of modified atmosphere parameters is adopted, a full-chain linkage fresh-keeping technology system covering production area-logistics-shelf is constructed, and the core problems of difficulty in ethylene sensitive fresh-keeping, link splitting, high cost and the like in the small white apricot industry are solved. The technology has been applied in Xinjiang Uygur autonomous region warehouse car and wheel platform demonstration bases, the shelf life of eight-mature small white apricots reaches 10-15 days, and the intact fruit rate is 92% or above and is prolonged by 3-5 times compared with a traditional technology.

The embodiment of the invention discloses a fruit dynamic controlled atmosphere container system based on a movable module and a controlled atmosphere control method, and the method comprises the steps: monitoring the environment data of each module in real time, enabling a central control unit to dynamically dispatch the positions of the modules according to preset fruit controlled atmosphere parameters, and adjusting the parameters of a corresponding airflow channel; and differential microenvironment accurate control for different fruits is realized. According to the embodiment of the invention, the problems that the environment in a traditional controlled atmosphere container is not uniform and multiple varieties of fruits cannot be loaded and transported in a mixed manner are effectively solved, the fresh-keeping quality and the transportation efficiency are remarkably improved, and the intelligent controlled atmosphere container has the advantages of high intelligent degree, high adaptability, energy conservation and high efficiency.

An air-conditioning fresh-keeping device and a refrigerator, the air-conditioning fresh-keeping device (41) comprising: an air-conditioning cabin housing (10) having an internal cavity; the air-conditioned cabin drawer (20) is movably connected with the internal cavity and is configured to move relative to the air-conditioned cabin shell (10) so as to be switched between a closed state in which the air-conditioned cabin drawer (20) is accommodated in the internal cavity and an open state in which at least part of the air-conditioned cabin drawer (20) is exposed out of the air-conditioned cabin shell (10); and the gas recycling and reusing mechanism (30) is connected with the controlled atmosphere cabin drawer (20) and is configured to recycle the controlled atmosphere fresh-keeping gas in the controlled atmosphere cabin drawer (20) in the process that the controlled atmosphere cabin drawer (20) is switched from the closed state to the open state. And in the process that the controlled atmosphere cabin drawer (20) is switched from the opening state to the closing state, the recycled controlled atmosphere fresh-keeping gas is released into the controlled atmosphere cabin drawer (20).

The invention discloses a preparation method of a high-hydrogen-resistance pure iron nitriding composite diaphragm, which comprises the following steps: putting a matrix into a controllable atmosphere well type nitriding furnace, raising the temperature in the controllable atmosphere well type nitriding furnace to 460-500 DEG C at the temperature raising rate of 5-15 DEG C / min, and carrying out heat preservation for 2-6 hours to nitride the matrix; the base body is placed in a uniform temperature area of a tubular vacuum heat treatment furnace, the tubular vacuum heat treatment furnace is vacuumized, the temperature in the tubular vacuum heat treatment furnace is increased to 480-520 DEG C at the speed of 5-15 DEG C / mi, and heat preservation is conducted for 0.5-2 hours; taking out the matrix after the temperature in the tubular vacuum heat treatment furnace is reduced to room temperature; the hydrogen resistance of the prepared composite diaphragm can reach 13 times that of a pure iron matrix, the performance improvement amplitude is far higher than 3 times that of single gas nitriding treatment, and the composite diaphragm has the characteristics of good mechanical stability and strong deformation resistance.

This invention relates to the field of casting technology, and more particularly to a high-strength drive wheel casting process. The steps include: Step 1, alloy material preparation; Step 2, melting and micro-alloying treatment; Step 3, mold preparation and pouring; Step 4, solidification and cooling staged control; and Step 5, heat treatment process. By optimizing the alloy composition, improving the mold structure, precisely controlling melting and pouring, and adapting the heat treatment process, this invention solves the technical problems of insufficient strength, high defect rate, and poor forming accuracy in existing drive wheels. The invention also improves the structure and adapts the cooling chamber to the process, combining a controlled atmosphere cooling chamber with a staged cooling process. It incorporates partition isolation components, waste heat recovery components, and a temperature control unit, achieving independent partitioned cooling of the casting, precise temperature control, and waste heat reuse. This solves the problems of "airflow interference, uneven cooling, and energy waste" in existing cooling chambers.

The invention discloses an airtight insect killing system and method for a tobacco storehouse, and the system comprises a control device, a nitrogen gas source, a carbon dioxide gas source, a gas inlet pipeline, a gas exhaust pipeline, a gas extraction device and a plurality of micro-differential pressure sensors, and the control device is used for controlling the gas extraction device to extract gas from all airtight tents in the ith group at the same time; when the first air pressure data in each airtight tent in the ith group reach a preset air pressure range, controlling the exhaust equipment and the exhaust valve corresponding to the ith group to be closed, and then performing air tightness detection according to the second air pressure data in each airtight tent in the ith group; the control equipment is further used for executing N preset nitrogen charging and oxygen reducing procedures after the air tightness detection is qualified; and after the oxygen content in the airtight tents of the ith group reaches a first preset content range, controlling the carbon dioxide gas source to fill carbon dioxide into the airtight tents of the ith group or put dry ice into the airtight tents of the ith group. According to the invention, the efficiency of air tightness detection, nitrogen charging and oxygen reduction and controlled atmosphere insect killing can be improved.

The invention belongs to the technical field of hickory nut storage, and discloses a hickory nut anti-oxidation storage pretreatment process and pretreatment equipment, and the process comprises the following steps: S1, sorting freshly picked and cleaned hickory nuts through the pretreatment equipment, and removing empty and shriveled seeds, bad seeds and the like; s2, screening the hickory nuts without empty and shriveled seeds, bad seeds and the like through pretreatment equipment in a unified manner to distinguish small, medium and large hickory nuts, and respectively feeding the hickory nuts into different assembly lines for spraying antioxidant and edible coating liquid; s3, the small, medium and large carya cathayensis fruits sprayed with the coating liquid enter different intelligent controlled atmosphere all-in-one machines to be subjected to controlled atmosphere treatment, and low-temperature storage is combined, so that the storage period of the carya cathayensis fruits with shells is prolonged to 6-8 months, and the storage period of the shelled carya cathayensis kernels is prolonged to 3-4 months; wherein during the controlled atmosphere treatment, the concentration of oxygen is 2-5%, the concentration of carbon dioxide is 3-5%, and the balance is nitrogen. According to the low-oxygen environment, moisture evaporation and nutrient consumption of the nuts are reduced, the freshness of the nuts can be kept, and peculiar smells caused by oxidation are avoided.

System (1) for biofuel storage and having: a tank (2) configured to contain the biofuel; a thermal conditioning unit (3) configured to maintain the biofuel that is inside the tank (2) at a desired temperature; a delivery unit (6) configured to draw biofuel that is inside the tank (2) to supply the biofuel to a tank of an external user device; an atmosphere conditioning unit (4) configured to maintain inside the tank (2) a controlled atmosphere; and an additivation unit (5) configured to add at least one additive to the biofuel that is inside the tank (2).

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 invention relates to the technical field of controlled atmosphere transportation, and particularly discloses a controlled atmosphere transportation storage box which comprises a box body, a sealing door is arranged on the front face of the box body, a containing frame is arranged in the box body, an automatic feeding and discharging mechanism is arranged on the front face of the containing frame, and a plurality of containing plates are arranged in the containing frame. And automatic detection mechanisms are arranged at the inner top of the placement frame and the bottoms of the multiple placement plates. According to the food packaging box, through the arranged automatic feeding and discharging mechanism, food placed in the box body can be rapidly fed, the food in the box body can be rapidly taken out and discharged, fast feeding and fast discharging of the food are achieved, the opening time of a sealing door is shortened to the maximum extent, and the stable air conditioning environment is maintained; when the box body is used on a logistics center or a production line, the time consumption of single operation is reduced, the turnover frequency of a single box body is increased, and therefore the transportation or storage amount in unit time is increased.

The invention relates to a controlled atmosphere container closing device (8), comprising at least one support (9) arranged to hold a container (2) to be closed and at least one controlled atmosphere source (V, G). It is characterized in that it comprises a capping device (26) arranged to carry a stopper (3) and place it on said container (2) to close it, in that said stopper device (26) and said support (9) are arranged to delimit between them a sealed chamber (39) around said container (2) to be closed, and in that said sealed chamber (39) communicates with said at least one controlled atmosphere source (V, G) via at least one conduit (24) to modify and / or control the air contained in said container (2) before the placement of said stopper (3). Figure for the abstract: Fig 6

The utility model relates to the technical field of vegetable fresh-keeping, and discloses a gas circulation assembly of a vegetable gas-adjusting fresh-keeping box, which comprises a main body, a fan is arranged at the top of the main body, one end of the fan is communicated with a gas mixing chamber, the other end of the gas mixing chamber is communicated with a gas inlet pipe, and a transfer chamber is arranged at the bottom of the gas inlet pipe. The outer wall of the transfer chamber communicates with an annular air duct, an air outlet is formed in the bottom of the annular air duct, the outer wall of the fan communicates with an air return pipe, an air return opening is formed in the bottom of the air return pipe, the front side of the inner wall of the gas mixing chamber is fixedly connected with a flow dividing baffle, and the middle of the inner wall of the gas mixing chamber is fixedly connected with a spoiler. According to the utility model, the fan is mounted at the top to realize gas circulation from top to bottom, the gas mixing chamber enables airflow to form turbulent flow, accelerates mixing and ensures gas uniformity, the gas is uniformly distributed to each corner through the air duct, and the air return pipe guides the gas back to the fan to form complete circulation.

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 application discloses a kind of nuclear reactor in-vessel component cylinder free forging and ring rolling method, successively including smelting, forging, ring rolling, solid solution heat treatment, performance test, final machining and nondestructive testing step.Control atmosphere in furnace, carry out secondary refining and vacuum degassing when smelting;Forging adopts 120MN water press and is divided into 5 fire times, by accurately controlling temperature, forging ratio and the like;Ring rolling adopts one fire time forming, strictly controls rolling speed, temperature and the like;Solid solution heat treatment controls furnace temperature, heating rate and the like;To the quality of cylinder forgings, performance test and nondestructive testing are carried out to ensure.The method accurately controls parameters in each link, improves the size accuracy and assembly accuracy of cylinder, reduces the number of welds, improves product quality and safety, improves production efficiency and reduces cost at the same time, accurately controls grain size, meets the stringent requirements of nuclear reactor.

The sterilization and deolefination temperature and humidity dynamic synergistic fruit preservation cold chain transportation equipment comprises an air-conditioned cold store which comprises an outer air-conditioned cold store and an inner air-conditioned cold store, the inner air-conditioned cold store is arranged in the outer air-conditioned cold store, and the top face and the side face of the inner air-conditioned cold store are spaced from each other to form a hollow interlayer; an ozone supply part, a moisture supply part, an ethylene extraction part, a carbon dioxide extraction part, a refrigeration part and a nitrogen supply part which are electrically connected with the controller are mounted on the side surface and the top surface of the inner air-conditioned cold store; an equipment mounting chamber is arranged at one end of the external air-conditioned cold store, and a store door is arranged at the other end; the fruit frame is provided with a plurality of transverse containing spaces in the length direction, each transverse containing space is provided with a plurality of detachable containing brackets at intervals in the height direction, and the bottom face of each containing bracket is of a grid structure. Limiting pieces are arranged on the end face and the side face of the fruit frame. The detection sensor is installed in the inner air-conditioned cold store and used for detecting the temperature and humidity of the inner air-conditioned cold store and the concentration of oxygen, carbon dioxide and ethylene.

The utility model provides a refrigeration appliance. The refrigerating appliance comprises a box body, a refrigerating chamber and a refrigerating chamber, wherein the box body is provided with a fresh-keeping chamber with an opening and a refrigerating cabin provided with a refrigerator; the drawer is movably contained in the fresh-keeping chamber and comprises a box body with an object taking opening and a cover plate for opening and closing the object taking opening; the door plate is connected with the box body, synchronously moves along with the box body and seals the opening of the fresh-keeping chamber; the cold supply channel is communicated with the refrigeration cabin and the fresh-keeping chamber, so that cold air in the refrigeration cabin flows into the fresh-keeping chamber and out of the drawer; the air conditioning unit is arranged outside the fresh-keeping chamber and forms a fresh-keeping atmosphere; and the controlled atmosphere channel is communicated with the controlled atmosphere unit and the interior of the drawer, so that a fresh-keeping atmosphere enters the drawer. Thus, fresh-keeping atmosphere is supplied into the drawer, cold air is supplied to the outside of the drawer, the temperature in the drawer and the fresh-keeping atmosphere are both considered, and the excellent food storage and fresh-keeping effect is achieved.

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.

The invention discloses a carburizing heat treatment method for a 25 # steel workpiece and the workpiece, and relates to the field of heat treatment. The carburizing heat treatment method for the 25 # steel workpiece comprises the following steps: carrying out controlled atmosphere carburizing on the 25 # steel workpiece, wherein the controlled atmosphere carburizing comprises five stages of exhausting and introducing carbon-containing gas to heat up, intensively carburizing, diffusing, cooling and purifying; the workpiece subjected to controlled atmosphere carburizing treatment is preheated at the temperature of 650-700 DEG C; quenching heating is conducted on the workpiece after preheating, the quenching heating temperature ranges from 840 DEG C to 860 DEG C, and after heating is completed, the workpiece is transferred into a solution alkali with the temperature ranging from 160 DEG C to 180 DEG C to be cooled; keeping the temperature of the workpiece below-50 DEG C for 4-5 hours; and finally, the workpiece is subjected to low-temperature tempering at 150-170 DEG C, discharged from the furnace and air-cooled to the room temperature. The carburizing heat treatment method for the 25 # steel workpiece can accurately control carbon potential, reduce heat treatment deformation of the workpiece, inhibit oxidation reaction to obtain a clean surface, and obtain the workpiece with preset carburizing layer depth and hardness.

The invention discloses refrigeration equipment. The refrigeration equipment comprises a compartment; the controlled atmosphere container is contained in the compartment and provided with a selective air and moisture permeable film for oxygen and moisture to pass through, and the controlled atmosphere container is provided with an air inlet; the air guide plate is arranged in the controlled atmosphere container, and the air guide plate is arranged at the air inlet and can rotate relative to the selective air and moisture permeable film; a refrigeration system; the cold air supply path is communicated with the refrigerating system and the air inlet so as to supply cold air into the controlled atmosphere container; the humidity sensor is used for detecting the humidity in the controlled atmosphere container; and the control system is connected with the humidity sensor and the air guide plate and is used for controlling the angle of the air guide plate relative to the selective air and moisture permeable film according to the humidity RH detected by the humidity sensor. According to the air conditioning container, cold supply and oxygen adjustment can be conducted on the air conditioning container, and the humidity in the air conditioning container can be adjusted.

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.

The utility model discloses a kind of air-conditioning storehouse insect-proof line medicine supplementing devices, it is related to grain storage technical field.The utility model includes insect-proof shell, the bottom of the inner chamber of insect-proof shell is provided with sponge board, the top of the sponge board is provided with insect-proof hose, the surface of the insect-proof hose is provided with hole, one end of the insect-proof hose is provided with medicine supplementing assembly, and the medicine supplementing assembly includes fastening screw.The utility model is arranged in the inner chamber of insect-proof shell and is connected with medicine supplementing assembly, the structure that thin film joint is penetrated through insect-proof film, so that staff can directly operate without entering insect-proof film to disassemble integral device, pull out sealing plug, utilize the process simple and easy to operate of syringe through injection tube to push injection medicine, and the setting of airtight valve can avoid medicine leakage, ensure that medicine supplementing process is safe and efficient, and this "plug and play" design reduces cumbersome steps, and greatly improves the work efficiency of granary insecticide supplementing.

A method of automating a pressure decay integrity test of a container configured for refrigeration by a transportation refrigeration unit (TRU) is provided. The method includes connecting a controller programmed with an automated pressure decay integrity test of the container to a compressor of the TRU and a pressure transducer installed in the container and executing the automated pressure decay integrity test by the controller. The executing includes activating the compressor to pressurize the container, receiving readings of the pressure transducer and determining, from the readings, whether the automated pressure decay integrity test is passed.

The invention relates to automatically performing a pressure attenuation integrity test of a controlled atmosphere of a refrigerated container, and particularly provides a method of automatically performing a pressure attenuation integrity test of a container configured to be refrigerated by a transport refrigeration unit (TRU). The method includes connecting a controller programmed with a pressure decay integrity test of the container to a compressor of the TRU and a pressure transducer mounted in the container, and performing the pressure decay integrity test by the controller. The performing includes: starting the compressor to pressurize the container; receiving the reading of the pressure transducer; and determining, from the readings, whether the pressure attenuation integrity test is passed.

The present application relates to the control adjustment technical field, especially a kind of high-altitude region potato's storage method and system, method constructs aerodynamics model by collecting environmental parameter and inverts respiration heat production rate, according to moisture dispersion potential energy and cooling condition, in oscillation ventilation and closed bud inhibition mode between alternative decision-making;Utilize sinusoidal pulsating airflow to destroy laminar boundary layer, utilize carbon dioxide accumulation to inhibit metabolism;Effectively solve the problem that physical cooling and moisture retention are difficult to consider under high-altitude low-pressure environment, realize the dynamic coupling of flow state reconstruction and metabolism inhibition;Not only greatly improve the heat exchange efficiency under low wind speed and reduce dry consumption through unsteady flow, but also can use biological spontaneous controlled atmosphere to block the accumulation of respiratory heat from the source under extreme dry conditions, significantly prolong the shelf life and commodity value of potato.

The invention discloses a granary local targeting air conditioning system and a control method, and the granary local targeting air conditioning system comprises a warehouse which is internally provided with a main gas concentration detection sensor and a plurality of auxiliary gas concentration detection sensors; the first inflating assembly is connected to the warehouse and used for inflating nitrogen and / or chlorine dioxide into the warehouse; the second air inflation assembly is connected to the warehouse and comprises a second air outlet pipe and a plurality of air inflation ports which are communicated with the second air outlet pipe and are arranged in one-to-one correspondence with the auxiliary gas concentration detection sensors, and the second air outlet pipe can independently inflate nitrogen and / or chlorine dioxide into the multiple air inflation ports; when the difference value between the numerical value of the main gas concentration detection sensor and the numerical value of the auxiliary gas concentration detection sensor is larger than a first preset value, the second inflation assembly inflates the corresponding inflation inlet. Targeted inflation and nitrogen and / or chlorine dioxide supplementation are carried out through independent inflation channels, and the problems of insufficient local concentration, non-uniform gas distribution and insect pest high temperature caused by warehouse air leakage are solved.

The invention discloses a moisture-permeable passive controlled atmosphere fresh-keeping bag and a preparation method and application thereof, the moisture-permeable passive controlled atmosphere fresh-keeping bag comprises a three-layer composite film formed through co-extrusion tape casting, and the three-layer composite film comprises an inner layer and an outer layer, the invention discloses an ethylene-modified polypropylene composite material, which is prepared from the following raw materials in parts by weight: 80 to 120 parts of polypropylene, 5 to 20 parts of ethylene adsorption powder, 5 to 10 parts of glycerol monostearate and 0.1 part of polyether modified polydimethylsiloxane. A middle layer comprising polypropylene; the outer layer comprises the following components in parts by weight: 80-120 parts of polypropylene and 5-20 parts of ethylene adsorption powder; wherein the three-layer composite film is provided with a plurality of laser micropores. A three-layer structure ethylene adsorption, antifogging and passive air conditioning technology is adopted for the prepared fresh-keeping bag, so that antifogging and ethylene adsorption can be achieved, oxygen, carbon dioxide and relative humidity in the bag are passively adjusted, and the atmosphere in the bag becomes suitable for fresh keeping and dormancy of fruits and vegetables which are prone to rot under high humidity.