Micro-pressure-reduction antibacterial fresh-keeping container

Abstract

The invention relates to a micro-pressure-reduction antibacterial fresh-keeping container which comprises a container body structure, a heat preservation maintenance layer arranged in an inner cavity of the container body structure, a heat preservation sealing door hinged to the side edge of the container body structure, a refrigeration main machine arranged on the outer side of the container body structure, a low-pressure obtaining system, a fumigation humidification system and a main machine control cabinet. The micro-pressure-reduction antibacterial fumigation box further comprises a fumigation humidification mist spraying head, a temperature and humidity monitoring probe, an illuminating lamp and an intelligent camera which are arranged in an inner cavity of the box body structure, and the micro-pressure-reduction antibacterial fumigation box relates to the technical field of micro-pressure-reduction bacteriostasis. According to the micro-pressure-reduction antibacterial fresh-keeping container, the fresh-keeping quality is improved by reducing the air pressure in the container, reducing the oxygen concentration and the carbon dioxide concentration and the appropriate low temperature and assisting the comprehensive effects of sterilization and bacteriostasis of the green fumigant.

Description

Technical Field

[0001] The invention relates to the technical field of micro-reduced and suppressed bacteria, in particular to a micro-reduced and suppressed bacteria fresh-keeping container. Background Art

[0002] With the improvement of people's living standards and the development and progress of society, the quality requirements for fresh agricultural products are getting higher and higher. Although ordinary cold storage and refrigerated containers have the basic refrigeration and preservation function for preserving and transporting fruits and vegetables and other agricultural products, due to the single function of low temperature, the preservation effect is not ideal. The cold storage and refrigerated transportation of many fruits and vegetables generally only have a shelf life of 7-14 days, and the loss of preservation is relatively large, which is far from meeting the requirements of the domestic and foreign markets for the shelf life and quality of fruits and vegetables; limited by the short refrigeration shelf life, fresh aquatic products and beef and mutton products are generally circulated to the market in the form of frozen products. Most of the frozen products have a lot of nutritional quality and taste after thawing, which reduces the value of fresh products. Relying on the existing refrigeration technology cannot meet the needs of many consumers for fresh non-frozen fresh products.

[0003] At present, cold storage and refrigerated containers have a dominant position in the field of fresh fruit and vegetable preservation due to their low production cost and strong versatility. In recent years, a large number of emerging fresh-keeping materials and packaging materials have appeared on the market, which have some positive effects on extending the shelf life of fresh fruits and vegetables and improving the quality of fresh-keeping. On the basis of ordinary cold storage and refrigerated containers, the shelf life has been extended. However, due to the high cost of use, extremely low reuse rate, limited scope of application, much waste of resources, and disadvantageous to environmental protection, the promotion and application of cold storage and refrigerated containers in the whole society are subject to many restrictions. The domestic and foreign markets are in urgent need of a technical equipment with strong versatility, low manufacturing cost, low use cost, reusability, and better preservation effect than ordinary cold storage and refrigerated containers.

[0004] The invention prolongs the freshness period of fresh agricultural products at a low cost, improves the freshness quality, and reduces the freshness loss. The invention can provide high-quality freshness preservation for fresh fruits and vegetables in remote provinces and regions of China and transport them to coastal areas for sale, and utilizes the technical advantages of lower freshness preservation cost, longer freshness preservation period and better freshness preservation quality. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a micro-reducing and antibacterial fresh-keeping container to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a micro-reduction and decompression sterilization fresh-keeping container, comprising a box structure, a heat preservation maintenance layer arranged in the inner cavity of the box structure, a heat preservation sealing door hinged on the side of the box structure, a refrigeration host arranged outside the box structure, a low-pressure acquisition system, a fumigation and humidification system and a host control cabinet, and also comprising a fumigation and humidification spray spray head arranged in the inner cavity of the box structure, a temperature and humidity monitoring probe, a lighting lamp and an intelligent camera, the refrigeration host comprises a host fixed on the outside of the box structure and a cold air blower built into the inner cavity of the box structure, the fumigation and humidification system comprises a built-in The spray head in the inner cavity of the box structure and the fumigation host arranged on the right side of the box structure, the box structure is built with an air pressure sensor, a temperature sensor, a humidity sensor and an oxygen concentration sensor, the low-pressure acquisition system includes a vacuum pump group fixed on the right side of the box structure and an equipment cabin separated by a partition plate fixed on the inner cavity of the box structure, the inner cavity of the equipment cabin is fixedly connected with a vacuum pump, one side of the partition plate is provided with an inlet and outlet air hopper connected to the box structure, the air outlet of the vacuum pump is connected with an outlet pipe extending to the surface of the box structure, and the air inlet of the vacuum pump is connected with the inlet and outlet air hopper through the air inlet pipe;

[0007] An inner groove is provided in the middle of the upper and lower inner cavity of the box structure, the surface of the inner groove is covered with a mesh plate, and the inner cavity of the inner groove is movably connected to an air guide component; the air guide component includes three air suction boxes connected in the middle by connecting pipes, and the two connecting pipes are controlled by switch valves, the bottom of the air suction box is rotatably connected to a walking wheel that is rollingly connected to the inner cavity of the inner groove by a motor drive, the surface air port of the air suction box is movably connected to a filter plate that abuts the bottom of the mesh plate, the bottom of the filter plate is fixedly connected to a top spring fixedly connected to the inner cavity of the air suction box, the inner cavity of the air suction box is fixedly connected to a limit hook hung at the mesh of the filter plate by a pull rope, and the left side of the air suction box is rotatably connected to a scraper, and one side of the scraper is reset by a reset spring. The spring is fixedly connected to the surface of the vacuum box, the inner cavity of the inner groove is rotatably connected to the take-up disk, the surface of the take-up disk is transmission-connected to a gold wire hose connected to the air inlet of the vacuum pump through an air supply pipeline, and the left end of the gold wire hose is connected to the rightmost vacuum box. When in use, it automatically identifies the category of fruits and vegetables, automatically sets the appropriate pressure, automatically controls the temperature and humidity, automatically selects the appropriate fumigant and starts the operation at a fixed time, monitors the storage quality of fruits and vegetables in real time, automatically identifies the category of fruits and vegetables, sets the appropriate pressure, automatically controls the temperature and humidity, and starts the refrigeration system to circulate refrigeration through the air cooler. Then, the vacuum pump is used to simultaneously evacuate the air through the inlet and outlet hoppers and the vacuum box to reduce the pressure and extract the internal air until it reaches below 0.The negative pressure is 4 standard atmospheres. At this time, chlorine dioxide, nitric oxide, hypochlorous acid, ethanol and ozone can be output through the fumigation and humidification system to kill or inhibit the bacteria that cause fruits, vegetables, aquatic products and meat products to rot and deteriorate under negative pressure, creating a low-pressure, low-oxygen, low-nitrogen dioxide environment suitable for fruit and vegetable storage. In addition, the air pressure sensors at multiple points are used for real-time detection to detect the air pressure values ​​at various locations. When the local air pressure value rises, it is judged that the local seal has failed, resulting in the entry of outside air. If the vacuum is directly drawn through a vacuum pump at this time, when there is a leak When the points are far apart, an air circulation will be formed inside the box structure, causing the outside air to quickly escape inside the box structure, affecting the internal air pressure environment. At this time, the motor drives the walking wheel to move and drive three air extraction boxes connected by connecting pipes to move. The setting of the three air extraction boxes can cover most positions of the box structure, and drive the rack to move while walking, and drive the take-up reel to rotate through the tooth path to release the gold wire hose, and then move to the air inlet point, and adjust the air extraction box closest to the air inlet point by controlling the switch valve on the surface of the connecting pipe to extract. The air entering from the outside is quickly sucked in, and then transported to the vacuum pump through the gold wire hose for output, which can maintain a low-pressure environment inside, and can control the gas changes in the local environment, reserving sufficient reaction time, and when the air is pumped through the vacuum box, the impurities in the air are filtered by the filter plate, and the impurities are adsorbed on the surface of the filter plate. When the vacuum box moves, it is scraped by the mesh plate and falls into the inner groove. When the vacuum box moves to the right, the scraper is lifted by the impurities and moves to the right side of the impurities. When the vacuum box moves to the left, the reset spring pulls the scraper to shovel the impurities and transport them to the left side of the inner groove, and the stroke ends of the three vacuum boxes overlap each other. Through the movement of the three vacuum boxes, all the impurities inside can be shoveled to the leftmost side of the inner groove through the scraper in turn for centralized collection, which is convenient for later cleaning. After the filter plate is worn out after a period of use, the top spring pushes the filter plate upward and continues to abut against the mesh plate to ensure continuous friction effect. Through the setting of the limit hook, a downward pulling force is provided to the filter plate to prevent the top spring from lifting too much, resulting in increased friction and accelerated loss. .

[0008] As a further solution of the present invention: a rack is fixedly connected to the right side of the rightmost vacuum box and is slidably connected to the bottom of the inner groove. The surface of the take-up reel is provided with a tooth path that meshes with the surface of the rack. The transmission ratio of the rack to the tooth path is 1:5.

[0009] As a further solution of the present invention: eight air pressure sensors are provided, and are symmetrically arranged at the eight corners of the inner cavity of the box structure. The air pressure sensors in the eight corners can detect the distribution of air pressure. When there is a local sealing failure and air intake, the approximate point of air intake can be quickly determined and processed.

[0010] As a further solution of the present invention: the inner groove is one tenth of the width of the bottom of the inner cavity of the box structure, and is symmetrically arranged up and down, which can effectively apply negative pressure suction to different parts and effectively prevent external air from entering and causing pressurization.

[0011] As a further solution of the present invention: the surface of the air outlet duct is connected to a return duct, one end of the return duct is connected to the inner cavity of the air inlet and outlet bucket, and through the setting of the return duct, multiple air flow circulations are formed in the inner cavity of the box structure through the return duct and the air extraction box during refrigeration, driving the cold air to flow rapidly in the box structure, and when it is detected that the local temperature difference is too large, the air extraction box is moved to the abnormal temperature area, and the local gas is extracted, so that the gas in the remaining space fills the gap, and the temperature is quickly adjusted.

[0012] As a further solution of the present invention: the mesh plate is made of stainless steel, and the filter plate is made of PVC. When in contact, the filter plate is tightly attached to the surface of the mesh plate to play a filtering function, and is easy to replace after friction loss.

[0013] As a further solution of the present invention: the fumigation gas output by the fumigation and humidification system includes chlorine dioxide, nitric oxide, hypochlorous acid and ozone.

[0014] As a further solution of the present invention: the box structure withstands a negative pressure of 0.4 standard atmospheric pressure, and the air tightness is greater than 2.7 cubic meters per hour.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention improves the preservation quality by reducing the air pressure inside the container, reducing the oxygen concentration and carbon dioxide concentration, and appropriately maintaining a low temperature, and assisting the comprehensive bactericidal and antibacterial effects of the green fumigant.

[0017] 2. The present invention uses air pressure sensors at multiple points to detect in real time, detecting the air pressure values ​​at various locations. When the local air pressure value rises, it is determined that the local seal has failed, resulting in the entry of outside air. If a vacuum is directly drawn through a vacuum pump at this time, when the leakage point is far away, an air flow circulation will be formed inside the box structure, causing the outside air to quickly escape in the box structure, affecting the internal air pressure environment. The vacuum box closest to the air inlet point is adjusted to evacuate the air, quickly draw in the outside air, and then transport it to the vacuum pump through a gold wire hose for output. This can maintain an internal low-pressure environment, control gas changes in the local environment, and reserve sufficient reaction time.

[0018] 3. The present invention, through the setting of the return pipe, forms multiple air circulations in the inner cavity of the box structure through the return pipe and the vacuum box during refrigeration, driving the cold air to flow rapidly in the box structure, and when it is detected that the local temperature difference is too large, the vacuum box is moved to the temperature abnormal area, and the local gas is extracted, so that the gas in the remaining space fills the gap, and the temperature is quickly adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A;

[0021] Figure 3 For the present invention Figure 1 A partial enlarged view of point B in the middle.

[0022] In the figure: 1. Box structure; 2. Partition board; 3. Inlet and outlet air bucket; 4. Vacuum pump; 5. Inlet pipe; 6. Outlet pipe; 7. Return pipe; 8. Air supply pipe; 9. Inner groove; 10. Mesh plate; 11. Air pressure sensor; 12. Take-up reel; 13. Gold wire hose; 14. Tooth path; 15. Rack; 16. Connecting pipe; 17. Switch valve; 18. Vacuum box; 19. Top spring; 20. Filter plate; 21. Scraper; 22. Reset spring; 23. Limit hook; 24. Refrigeration host; 25. Vacuum pump group; 26. Fumigation host; 27. Host control cabinet; 28. Smart camera; 29. ​​Fumigation and humidification spray sprinkler head; 30. Temperature and humidity monitoring probe; 31. Lighting. DETAILED DESCRIPTION

[0023] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0024] See also Figure 1-3The present invention provides a technical solution: a micro-reduction and decompression sterilization fresh-keeping container, comprising a box structure 1, a heat preservation and maintenance layer arranged in the inner cavity of the box structure 1, a heat preservation and sealing door hinged on the side of the box structure 1, a refrigeration host 24 arranged outside the box structure, a low-pressure acquisition system, a fumigation and humidification system and a host control cabinet 27, and also comprising a fumigation and humidification spray spray head 29 arranged in the inner cavity of the box structure 1, a temperature and humidity monitoring probe 30, a lighting lamp 31 and an intelligent camera 28, the refrigeration host 24 comprises a host fixed on the outer side of the box structure and a cold air blower built into the inner cavity of the box structure 1, the fumigation and humidification system comprises a spray head built into the inner cavity of the box structure 1 and a fumigation host arranged on the right side of the box structure. The fumigation host 26 is connected to the fumigation humidification spray nozzle 29 for spraying. The box structure 1 is equipped with an air pressure sensor 11, a temperature sensor, a humidity sensor and an oxygen concentration sensor. The low-pressure acquisition system includes a vacuum pump group 25 fixed on the right side of the box structure 1 and an equipment cabin separated by a partition plate 2 fixed on the inner cavity of the box structure 1. The inside of the box structure 1 is evacuated by the vacuum pump group 25. The inner cavity of the equipment cabin is fixedly connected with a vacuum pump 4. One side of the partition plate 2 is provided with an inlet and outlet air bucket 3 connected with the box structure 1. The air outlet of the vacuum pump 4 is connected with an outlet pipe 6 extending to the surface of the box structure 1. The air inlet of the vacuum pump 4 is connected with the inlet and outlet air bucket 3 through an air inlet pipe 5.

[0025] An inner groove 9 is provided in the middle of the upper and lower inner cavity of the box structure 1, and the surface of the inner groove 9 is covered with a mesh plate 10, and the inner cavity of the inner groove 9 is movably connected to an air guide component; the air guide component includes three air suction boxes 18 connected in the middle by a connecting pipe 16, and the two connecting pipes 16 are controlled by a switch valve 17, the bottom of the air suction box 18 is rotatably connected to a walking wheel connected to the inner cavity of the inner groove 9 by a motor drive, the surface air port of the air suction box 18 is movably connected to a filter plate 20 abutting the bottom of the mesh plate 10, the bottom of the filter plate 20 is fixedly connected to a top spring 19 fixedly connected to the inner cavity of the air suction box 18, the inner cavity of the air suction box 18 is fixedly connected to a limit hook 23 hung on the mesh of the filter plate 20 by a pull rope, the left side of the air suction box 18 is rotatably connected to a scraper 21, and one side of the scraper 21 is connected to the inner cavity of the air suction box 18. The over-reset spring 22 is fixedly connected to the surface of the vacuum box 18, the inner cavity of the inner groove 9 is rotatably connected to the take-up reel 12, the surface of the take-up reel 12 is transmission-connected to the gold wire hose 13 connected to the air inlet of the vacuum pump 4 through the air supply pipe 8, the left end of the gold wire hose 13 is connected to the rightmost vacuum box 18, when in use, it automatically identifies the fruit and vegetable category, automatically sets the appropriate pressure, automatically controls the temperature and humidity, automatically selects the appropriate fumigant and starts the operation at a fixed time, monitors the storage quality of fruits and vegetables in real time, automatically identifies the fruit and vegetable category to set the appropriate pressure, automatically controls the temperature and humidity, and starts the refrigeration system at this time to circulate refrigeration through the air cooler, and then at this time, the vacuum pump 4 is used to simultaneously evacuate the air through the air inlet and outlet bucket 3 and the vacuum box 18 to reduce the pressure and extract the internal air until it reaches below 0.4 standard atmospheric pressures, at this time, chlorine dioxide, nitric oxide, hypochlorous acid, ethanol and ozone can be output through the fumigation and humidification system to kill or inhibit bacteria that cause fruits, vegetables, aquatic products and meat products to rot and deteriorate under negative pressure, creating a low-pressure, low-oxygen, low-nitrogen dioxide environment suitable for fruit and vegetable storage, and through multiple point pressure sensors 11 to detect in real time, detect the air pressure value at various places, when the local air pressure value rises, it is judged that the local seal fails, causing outside air to enter. If the vacuum is directly drawn through the vacuum pump 4 at this time, when the leakage point is far away, it will be in the box structure 1 An airflow cycle is formed inside, causing the outside air to quickly escape inside the box structure 1, affecting the internal air pressure environment. At this time, the motor drives the walking wheel to move and drive three air extraction boxes 18 connected by the connecting pipe 16 to move. The setting of the three air extraction boxes 18 can cover most positions of the box structure 1, and drive the rack 15 to move when walking, and drive the take-up reel 12 to rotate through the tooth path 14 to release the gold wire hose 13, and then move to the air inlet point, and adjust the air extraction box 18 closest to the air inlet point to extract air by controlling the switch valve 17 on the surface of the connecting pipe 16, so as to remove the air entering from the outside. It is quickly sucked in and then transported to the vacuum pump 4 through the gold wire hose 13 for output, which can maintain a low-pressure environment inside and control the gas change in the local environment, leaving sufficient reaction time. When the air is pumped through the vacuum box 18, the impurities in the air are filtered by the filter plate 20. The impurities are adsorbed on the surface of the filter plate 20 and are scraped off by the mesh plate 10 and fall into the inner groove 9 when the vacuum box 18 moves. When the vacuum box 18 moves to the right, the scraper 21 is lifted up by the impurities and moves to the right side of the impurities. When the vacuum box 18 moves to the left, the reset spring 22 pulls the scraper 2 1 so that it can shovel up the impurities and transport them to the left side of the inner groove 9, and the stroke ends of the three vacuum boxes 18 overlap each other. Through the movement of the three vacuum boxes 18, all the impurities inside can be shoveled to the leftmost side of the inner groove 9 through the scraper 21 in turn for centralized collection, which is convenient for later cleaning. After the filter plate 20 is worn out after being used for a period of time, the top spring 19 pushes the filter plate 20 to move upward and continue to abut against the mesh plate 10 to ensure a continuous friction effect. Through the setting of the limit hook 23, a downward pulling force is provided to the filter plate 20 to prevent the top spring 19 from lifting too much, resulting in increased friction and accelerated loss. .

[0026] A rack 15 slidably connected to the bottom of the inner groove 9 is fixedly connected to the right side of the rightmost vacuum box 18, and a tooth path 14 meshing with the surface of the rack 15 is provided on the surface of the take-up reel 12, and the transmission ratio of the rack 15 to the tooth path 14 is 1:5.

[0027] There are eight air pressure sensors 11, and they are symmetrically arranged at the eight corners of the inner cavity of the box structure 1. The air pressure sensors 11 in the eight corners can detect the distribution of air pressure and quickly determine the approximate point of air intake for processing when there is a local sealing failure and air intake.

[0028] The inner groove 9 is one tenth of the width of the bottom of the inner cavity of the box structure 1 and is symmetrically arranged up and down, which can effectively apply negative pressure suction to different parts and effectively prevent the outside air from entering and causing pressurization.

[0029] The surface of the air outlet duct 6 is connected to a return duct 7, and one end of the return duct 7 is connected to the inner cavity of the air inlet and outlet bucket 3. Through the setting of the return duct 7, multiple air flow circulations are formed in the inner cavity of the box structure 1 through the return duct 7 and the air extraction box 18 during refrigeration, driving the cold air to flow rapidly in the box structure 1, and when it is detected that the local temperature difference is too large, the air extraction box 18 is moved to the temperature abnormal area, and the local gas is extracted, so that the gas in the remaining space fills the gap and the temperature is quickly adjusted.

[0030] The mesh plate 10 is made of stainless steel, and the filter plate 20 is made of PVC. When in contact, the filter plate 20 is tightly attached to the surface of the mesh plate 10 to play a filtering function, and is easy to replace after friction loss.

[0031] The fumigation gases output by the fumigation and humidification system include chlorine dioxide, nitric oxide, hypochlorous acid, ethanol and ozone.

[0032] The box structure 1 withstands a negative pressure of 0.4 standard atmospheric pressure, and the air tightness is greater than 2.7 cubic meters per hour.

[0033] Control the stability of the pressure value, and set the corresponding air pressure, temperature, humidity, concentration of green fumigant and action frequency time according to the different properties of fresh agricultural products. The air pressure inside the micro-reduction and suppression bacteria preservation container of the present invention is 60% to 90% of the standard atmospheric pressure. The green fumigant includes a compounded natural plant essential oil and a green fumigant gas without harmful residues. The fumigant gas includes chlorine dioxide, nitric oxide, hypochlorous acid, ozone, etc. The appearance of the micro-reduction and suppression bacteria preservation container is consistent with that of a traditional refrigerated container, and the technical principle and implementation path of preservation are completely different from those of a traditional refrigerated container.

[0034] In order to achieve micro-reduction, suppression, sterilization and preservation, the present invention adopts the following technical scheme: the container body has pressure resistance and sealing performance, can withstand a negative pressure equivalent to 0.4 standard atmospheric pressure at most, and the air tightness is not less than 2.7 cubic meters / hour; the refrigeration unit, vacuum pump, humidification, fumigation pressurization device, and control system are installed on the outside of one end of the container; the container is equipped with a refrigeration fan, fumigation and humidification spray spray head, temperature and humidity monitoring probe, lighting and intelligent camera.

[0035] The present invention has the following advantages by adopting the above technical scheme: 1. It can create a low-pressure, low-oxygen, low-nitrogen dioxide environment suitable for fruit and vegetable storage in the container; 2. A low-temperature storage environment is created by using a refrigeration unit; 3. Green fumigation technology is used to kill or inhibit bacteria that cause fruits, vegetables, aquatic products and meat products to rot and deteriorate under a negative pressure environment; 4. The fumigation gas is automatically selected and the fumigation frequency and time of the fumigation gas are controlled, and humidification is automatically performed; 5. The fumigation device reduces the respiration intensity and respiration heat generation of fresh agricultural products, reduces the load of the refrigeration unit, and has an obvious energy-saving effect; 6. The central control system is adopted to achieve a high degree of intelligence, save labor costs, and the automatic mode can be set, and remote control can also be performed through a mobile phone app.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A micro-reduced pressure sterilization fresh-keeping container, comprising a box structure (1), a heat-insulating maintenance layer arranged in the inner cavity of the box structure (1), a heat-insulating sealing door hinged on the side of the box structure (1), a refrigeration host (24) arranged outside the box structure, a low-pressure obtaining system, a fumigation and humidification system and a host control cabinet (27), and also comprising a fumigation and humidification spray spray head (29) arranged in the inner cavity of the box structure (1), a temperature and humidity monitoring probe (30), a lighting lamp (31) and an intelligent camera (28), the refrigeration host (24) comprising a host fixed on the outer side of the box structure and a cold air blower built into the inner cavity of the box structure (1), the fumigation and humidification system comprising a spray head built into the inner cavity of the box structure (1) and a fumigation host (26) arranged on the right side of the box structure, the box structure (1) having a built-in air pressure sensor (11), a temperature sensor, a humidity sensor and an oxygen concentration sensor, characterized in that: The low-pressure obtaining system comprises a vacuum pump group (25) fixed on the right side of the box structure (1) and an equipment cabin separated by a partition plate (2) fixed on the inner cavity of the box structure (1); the inner cavity of the equipment cabin is fixedly connected to a vacuum pump (4); one side of the partition plate (2) is provided with an air inlet and outlet hopper (3) connected to the box structure (1); the air outlet of the vacuum pump (4) is connected to an air outlet pipeline (6) extending to the surface of the box structure (1); the air inlet of the vacuum pump (4) is connected to the air inlet and outlet hopper (3) through an air inlet pipeline (5); An inner groove (9) is provided in the middle of the upper and lower inner chamber of the box structure (1), the surface of the inner groove (9) is covered with a mesh plate (10), and the inner chamber of the inner groove (9) is movably connected to an air guide component; the air guide component comprises three air extraction boxes (18) connected in the middle by a connecting pipe (16), and the two connecting pipes (16) are controlled by a switch valve (17), the bottom of the air extraction box (18) is rotatably connected to a walking wheel that is rollingly connected to the inner chamber of the inner groove (9) through a motor drive, the surface air port of the air extraction box (18) is movably connected to a filter plate (20) that abuts against the bottom of the mesh plate (10), and the bottom of the filter plate (20) is fixedly connected to a A top spring (19) is fixedly connected to the inner cavity of the vacuum box (18); the inner cavity of the vacuum box (18) is fixedly connected to a limit hook (23) hung on the mesh of the filter plate (20) through a pull rope; the left side of the vacuum box (18) is rotatably connected to a scraper (21); one side of the scraper (21) is fixedly connected to the surface of the vacuum box (18) through a return spring (22); the inner cavity of the inner groove (9) is rotatably connected to a take-up drum (12); the surface of the take-up drum (12) is transmission-connected to a gold wire hose (13) connected to the air inlet of the vacuum pump (4) through an air supply pipe (8); the left end of the gold wire hose (13) is connected to the rightmost vacuum box (18).

2. The micro-reduction and decompression sterilization fresh-keeping container according to claim 1, characterized in that: A rack (15) is fixedly connected to the right side of the rightmost vacuum box (18) and is slidably connected to the bottom of the inner groove (9). The surface of the take-up reel (12) is provided with a tooth path (14) that meshes with the surface of the rack (15). The transmission ratio between the rack (15) and the tooth path (14) is 1:

5.

3. The micro-reduction and decompression sterilization fresh-keeping container according to claim 1, characterized in that: There are eight air pressure sensors (11), which are symmetrically arranged at eight corners of the inner cavity of the box structure (1).

4. The micro-reduction and decompression sterilization fresh-keeping container according to claim 1, characterized in that: The inner groove (9) is one tenth of the width of the bottom of the inner cavity of the box structure (1) and is symmetrically arranged up and down.

5. The micro-reduction and decompression sterilization fresh-keeping container according to claim 1, characterized in that: The surface of the air outlet pipe (6) is connected to a return pipe (7), and one end of the return pipe (7) is connected to the inner cavity of the air inlet and outlet bucket (3).

6. The micro-reduction and decompression sterilization fresh-keeping container according to claim 1, characterized in that: The mesh plate (10) is made of stainless steel, and the filter plate (20) is made of PVC.

7. The micro-reduction and decompression sterilization fresh-keeping container according to claim 1, characterized in that: The fumigation gases output by the fumigation and humidification system include chlorine dioxide, nitric oxide, hypochlorous acid, ethanol and ozone.

8. The micro-reduction and decompression sterilization fresh-keeping container according to claim 1, characterized in that: The box structure (1) withstands a negative pressure of 0.4 standard atmospheric pressure, and has an air tightness greater than 2.7 cubic meters per hour.

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