A yam fresh-keeping device with chlorine dioxide sterilization and high-temperature healing compound

Abstract

The application provides a yam fresh-keeping device combining chlorine dioxide sterilization and high-temperature healing, which comprises a chlorine dioxide generating and recycling unit for generating and recycling chlorine dioxide gas, a high-temperature and high-humidity healing treatment unit for providing a high-temperature and high-humidity environment to promote yam healing, a sensor monitoring unit for monitoring environmental parameters in real time, an electrical control unit for controlling the cooperation of the units, a fresh-keeping warehouse provided with a yam stacking area, a warehouse door and a heat preservation layer, and the chlorine dioxide generating and recycling unit, the high-temperature and high-humidity healing treatment unit, the sensor monitoring unit and the electrical control unit are integrated in the fresh-keeping warehouse body. The application combines chlorine dioxide gas sterilization and high-temperature and high-humidity healing treatment, greatly improves the fresh-keeping effect and quality stability of yam, and the high-temperature and high-humidity environment can promote the natural healing of slight damage on the surface of yam, form a protective layer, reduce water loss and rotting, and prolong the storage period of yam.

Description

Technical Field

[0001] This invention relates to the field of yam preservation technology, and in particular to a yam preservation device that combines chlorine dioxide sterilization with high-temperature wound healing. Background Technology

[0002] Yam, also known as Huai yam, white yam, and wild yam, is the rhizome of a perennial vine belonging to the Dioscoreaceae family. In my country, it is mainly distributed in the hilly and low-mountain regions of Northeast, North, Central, Southeast, and Southwest China. Yam is rich in various minerals, 16 essential amino acids, polysaccharides, allantoin, proteins, and other active ingredients, and has effects such as lowering blood sugar, anti-oxidation, and regulating the body's immune function. 'Jiujin Huang' yam, also known as vegetable yam, originated in Jiaozuo, Henan Province. It is sown in early to mid-April and harvested in early to mid-October, characterized by high input, high yield, and high efficiency.

[0003] Yam roots and stems are slender, with crisp flesh and thin skin, making them susceptible to mechanical damage during harvesting and transportation. Their high water content and rich nutrients also make them prone to rotting during storage. Therefore, achieving high-quality, long-term storage of yams is one of the most critical challenges in the yam industry. Furthermore, fresh-cut yams are subject to mechanical damage during processing, making them highly susceptible to browning and quality deterioration, severely impacting their edible value, commercial value, and shelf life. Therefore, research into preservation processes and technologies that address the issues of easy spoilage during long-term storage and the short shelf life, browning, and quality deterioration of fresh-cut yams after post-harvest commercial processing is crucial for overcoming industry bottlenecks and significantly improving the industry's quality and efficiency.

[0004] Chlorine dioxide (ClO2), as a broad-spectrum, highly efficient, and safe disinfectant, can effectively kill microorganisms. The reaction between ClO2 and organic matter during disinfection is primarily an oxidation reaction, producing no harmful substances such as chloroform and causing no secondary pollution. It is a high-performance and highly effective food preservative. Fumigating yams with gaseous ClO2 can prevent water-soluble nutrients such as soluble sugars, organic acids, and amino acids from dissolving in water during soaking, thus avoiding nutrient loss and deterioration of sensory characteristics in processed products. Simultaneously, plant tissues produce complex responses after mechanical damage. Treating yam segments with callus formation under suitable temperature and humidity conditions can enhance the level of reactive oxygen species metabolism in the tissue, increase the metabolic activity of phenolic substances, and stimulate the rapid formation of callus tissue at the cut site, thereby effectively reducing decay and weight loss and maintaining the nutritional value and quality of the yam.

[0005] Therefore, in response to the problems mentioned above, this invention proposes a yam preservation device that combines chlorine dioxide sterilization with high-temperature wound healing. Summary of the Invention

[0006] To overcome the problems of easy spoilage and deterioration of yams during long-term storage and the short shelf life, easy browning, and quality deterioration of fresh-cut yams after post-harvest commercial processing, this invention proposes a yam preservation device combining chlorine dioxide sterilization and high-temperature callus treatment. By utilizing the efficient combined treatment of chlorine dioxide (ClO2) and high-temperature callus treatment, the device achieves integrated and automated chlorine dioxide sterilization and high-temperature callus treatment, effectively solving problems such as low processing efficiency, inconsistent processing degree, and high labor costs. At the same time, this combined treatment process can significantly extend the storage and shelf life of yams, delay the occurrence of browning in fresh-cut products, reduce the spoilage rate, ensure their marketability, and extend the storage and shelf life of yams.

[0007] The technical solution of this invention is: a yam preservation device combining chlorine dioxide sterilization and high-temperature wound healing, comprising:

[0008] The chlorine dioxide generation and recovery unit is used to generate and recover chlorine dioxide gas;

[0009] The high temperature and high humidity healing unit is used to provide a high temperature and high humidity environment to promote the healing of yam.

[0010] The sensor monitoring unit is used to monitor environmental parameters in real time.

[0011] The electrical control unit is used to control the coordinated operation of each unit.

[0012] The cold storage facility has an internal yam stacking area, and is equipped with a door and insulation layer;

[0013] The chlorine dioxide generation and recovery unit, the high-temperature and high-humidity wound healing unit, the sensor monitoring unit, and the electrical control unit are all integrated into the cold storage unit.

[0014] Preferably, after harvesting, the yams are left at room temperature overnight to remove field heat. Loose surface mud and sand are simply shaken off. Both ends of the yams are cut off to create artificial wounds. The cut yams are then placed in a sealed treatment chamber and treated with chlorine dioxide gas at a concentration of 50-200 ppm for 10 minutes. The chlorine dioxide-treated yams are then subjected to high-temperature wound healing treatment at 35°C and 85-95% relative humidity for 7 days. After treatment, the storage temperature is lowered to 4°C, and the wounded yams are cooled until the core temperature reaches 4°C. They can then be stored for long-term storage.

[0015] Preferably, the chlorine dioxide generation and recovery unit includes a chlorine dioxide generator, a chlorine dioxide recovery device, an exhaust fan, and a fresh air fan. The chlorine dioxide generator is used to generate chlorine dioxide gas, the chlorine dioxide recovery device is used to treat and recover waste gas, the exhaust fan is used to discharge the gas in the storage room, and the fresh air fan is used to introduce fresh air to regulate the composition of the gas in the storage room.

[0016] Preferably, the high-temperature and high-humidity wound healing unit includes a temperature-controlled fan, a high-pressure spray humidifier, a differential pressure fan, and a retractable air guide curtain. The temperature-controlled fan is used to heat or lower the air temperature inside the storage room, the high-pressure spray humidifier is used to increase the humidity inside the storage room, the differential pressure fan is used to promote airflow circulation, and the retractable air guide curtain is used to guide the airflow direction.

[0017] Preferably, the sensor monitoring unit includes a temperature sensor, a humidity sensor, a chlorine dioxide concentration sensor, and a pressure sensor, wherein the temperature sensor is used to monitor the temperature inside the storage room, the humidity sensor is used to monitor the humidity inside the storage room, the chlorine dioxide concentration sensor is used to monitor the concentration of chlorine dioxide gas, and the pressure sensor is used to monitor changes in the pressure inside the storage room.

[0018] Preferably, the electrical control unit includes a PLC and an electrical control box. The PLC is used to receive sensor signals and control various actuators. The electrical control box has a built-in PLC and is electrically connected to the temperature control fan, differential pressure fan, chlorine dioxide generator, high-pressure spray humidifier, exhaust fan, fresh air fan and various sensors.

[0019] As a preferred option, the differential pressure fan and the retractable air guide curtain work together to create a negative pressure zone in the yam stacking area, guiding the high-temperature and high-humidity airflow and the airflow containing chlorine dioxide to pass evenly through the yam stacks.

[0020] Preferably, the exhaust fan is connected to the chlorine dioxide recovery device to discharge the chlorine dioxide-containing gas after treatment and to carry out harmless treatment.

[0021] Preferably, the cold storage facility has multiple yam stacking areas, each equipped with an independent airflow structure. Exhaust fans, chlorine dioxide generators, temperature sensors, humidity sensors, air pressure sensors, chlorine dioxide concentration sensors, and differential pressure fans are all located within the cold storage facility. The temperature sensor is electrically connected to the exhaust fan, which regulates the air temperature inside the cold storage facility. The humidity sensor is electrically connected to a high-pressure spray humidifier, which regulates the air humidity inside the cold storage facility. The chlorine dioxide concentration sensor is electrically connected to the chlorine dioxide generator, which provides chlorine dioxide gas to the cold storage facility. The air pressure sensor is electrically connected to a fresh air fan, which replenishes the air inside the cold storage facility.

[0022] The beneficial effects of this invention are:

[0023] 1. This invention significantly improves the preservation effect and quality stability of yam by combining chlorine dioxide gas sterilization with high temperature and humidity healing treatment. Chlorine dioxide, as a highly efficient, broad-spectrum and safe bactericide, can effectively kill microorganisms and pathogens on the surface of yam, with low residue and no harmful substances generated, overcoming the food safety hazards that may be caused by traditional chemical preservatives. At the same time, the high temperature and humidity environment can promote the natural healing of minor damage on the surface of yam, forming a protective layer, reducing moisture loss and rot, and extending the storage period of yam.

[0024] 2. This device integrates a chlorine dioxide generation and recovery unit, a high-temperature and high-humidity wound treatment unit, and a multi-parameter sensor monitoring unit, realizing automatic control of sterilization, wound treatment, ventilation, and recovery. Through PLC intelligent regulation of the coordinated operation of each execution unit, it not only improves processing efficiency and consistency, but also significantly reduces the intensity and error of manual operation. It is particularly suitable for large-scale, continuous post-harvest processing of yam and has good prospects for industrial application. Attached Figure Description

[0025] Figure 1 The diagram shown is a cross-sectional view of the device of the present invention.

[0026] Figure 2 The diagram shows the appearance of yam during storage, according to embodiments and comparative examples of the present invention.

[0027] Figure 3 The diagram shows a comparison of the rot rate of yam during storage between embodiments of the present invention and comparative examples.

[0028] Figure 4 The diagram shows the appearance of fresh-cut yam during its shelf life, according to embodiments and comparative examples of the present invention.

[0029] Figure 5 The diagram illustrates the color difference and browning index of fresh-cut yam during shelf life in embodiments and comparative examples of the present invention.

[0030] Explanation of reference numerals in the attached diagram: 1. Temperature control fan; 2. High-pressure spray humidifier; 3. Differential pressure fan; 4. Retractable air curtain; 5. Exhaust fan; 6. Chlorine dioxide generator; 7. Chlorine dioxide recovery device; 8. Insulation layer; 9. Temperature sensor; 10. Humidity sensor; 11. Chlorine dioxide concentration sensor; 12. Yam stacking area; 13. Warehouse door; 14. PLC; 15. Fresh air storage; 16. Fresh air fan; 17. Air pressure sensor. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1 The present invention provides an embodiment of a yam preservation device that combines chlorine dioxide sterilization and high temperature callus treatment, comprising a preservation warehouse 15, a chlorine dioxide generation and recovery unit, a high temperature and high humidity callus treatment unit, and a sensor monitoring unit.

[0033] The cold storage 15 has a yam stacking area 12 for storing yams;

[0034] The chlorine dioxide generation and recovery unit includes a chlorine dioxide generator 6 and a chlorine dioxide recovery processor 7, which are used to generate chlorine dioxide to preserve the yam and to recover the generated chlorine dioxide at the same time.

[0035] The high-temperature and high-humidity wound healing unit includes a temperature-controlled fan 1, a high-pressure spray humidifier 2, and a differential pressure fan 3, which are used to perform high-temperature wound healing on yam.

[0036] The sensor monitoring unit includes a temperature sensor 9, a temperature sensor 10, a chlorine dioxide concentration sensor 11, and a pressure sensor 17. All sensors are installed inside the cold storage 15 to monitor the internal environment of the cold storage 15 in real time. When the chlorine dioxide concentration in the air inside the cold storage 15 exceeds a set value, the chlorine dioxide concentration sensor 11 will start the exhaust fan 5 to remove the air from the cold storage, reducing the amount of chlorine dioxide in the cold storage 15 to the set value. At the same time as the exhaust fan 5 is working, the fresh air fan 11 will start simultaneously to replenish the air in the cold storage.

[0037] The device also includes an electrical control box, which contains a PLC controller 14. The PLC controller 14 is electrically connected to each module of the device and is used to control the operation of the device.

[0038] The device also includes a retractable air guide curtain 4 installed on the yam stacking area 12. The differential pressure fan 3 works in conjunction with the retractable air guide curtain 4 to guide the airflow direction and maintain a positive pressure environment inside the storage.

[0039] The device also includes a fresh air fan 16 and an exhaust fan 5, which are used to introduce fresh air and exhaust waste gas, respectively.

[0040] The device also includes a cold storage door 13 installed on the cold storage 15. The inner wall of the cold storage 15 is provided with a heat insulation layer 8. The cold storage door 13 is an automatic cold storage door with an airtight structure. The door control system includes a door controller, a motor, etc. The door controller is the core of the entire door control system. It is responsible for receiving signals from the carbon dioxide concentration sensor, controlling the motor to start and stop, and monitoring the position and status of the door. When the carbon dioxide gas concentration does not reach a safe value, the cold storage door 13 cannot be opened.

[0041] The device also includes a fresh air fan 16 and an exhaust fan 5, which are used to introduce fresh air and exhaust waste gas, respectively. The fresh air fan 16 is a precision fresh air fan 16. When the temperature inside the cold storage 15 deviates from the set temperature by +0.5℃, the temperature sensor 9 inputs a signal to the fresh air fan 16. When the temperature inside the cold storage reaches the set temperature, the fresh air fan 16 stops.

[0042] Temperature sensor 9 is connected to temperature-controlled fan 1, controlling the processing temperature at 35℃; humidity sensor 10 is connected to high-pressure spray humidifier 2, controlling the processing humidity at 85%-90%; chlorine dioxide concentration sensor 11 is connected to chlorine dioxide generator 6, controlling the chlorine dioxide concentration at 5 mg·L⁻¹. -1 The yam stacking area 12 is used for stacking yams. Note that the stacking direction is perpendicular to the cross-section of the yam and the airflow direction. The differential pressure fan 3 is used to control the gas circulation in the cold storage. The retractable air guide curtain 4 is used to cover the upper part of the stacking area and control the airflow direction. When the differential pressure fan 3 is turned on, a negative pressure zone is formed between the stacking areas 12, and the airflow outside the stacking area is positive pressure. During the processing, under the action of the pressure difference, the high temperature and high humidity airflow affected by the electric heater 1 and the high pressure spray humidifier 2, and the airflow with chlorine dioxide concentration affected by the chlorine dioxide generator 6 can fully contact the yams in the stacking area 12. At the same time, the retractable air guide curtain 4 prevents the airflow from passing through the upper part of the stacking area, so that the airflow in the cold storage can only pass through the side of the stacking area 12, further ensuring the sufficiency and uniformity of the processing. Fresh air fan 16 is used to introduce fresh air when it is necessary to reduce chlorine dioxide concentration or humidity. Exhaust fan 5 is used to exhaust the air in the warehouse after treatment. Exhaust fan 5 is connected to chlorine dioxide recovery device 7 to treat waste gas. PLC 14 is used for the system control of the entire cold storage. After the artificially damaged parts are cut off at both ends and stacked according to the stacking requirements, the warehouse door 13 is closed, fresh air fan 16 is turned off, exhaust fan 5 is turned off, differential pressure fan 3 is turned on, chlorine dioxide generator 6 is turned on, and chlorine dioxide concentration sensor 11 monitors the chlorine dioxide concentration as 5 mg·L⁻¹. -1At this time, the chlorine dioxide generator 6 stops working, and the process is carried out for 10 minutes under the action of the differential pressure fan 3. After the process is completed, the differential pressure fan 3 stops working, and the exhaust fan 5 and the chlorine dioxide recovery device 6 start working to remove and absorb the chlorine dioxide gas in the cold storage. During the chlorine dioxide removal process, the air in the storage will be reduced, which can be replenished by the fresh air fan 16. When the air pressure sensor 17 detects that the air pressure has dropped to a specified value, the fresh air fan 16 is turned on. After the chlorine dioxide gas is completely removed, the fresh air fan 16 and the exhaust fan 5 are turned off. Then, high-temperature healing is carried out. The differential pressure fan 3, the temperature control fan 1, and the high-pressure spray humidifier 2 are turned on. When the temperature sensor 9 detects that the temperature is 35°C, the electric heater temperature control fan 1 stops working. When the humidity sensor 10 detects that the humidity is 90%-95%, the high-pressure spray humidifier 2 is turned on. During this period, the temperature and humidity are maintained at the above requirements for 7 days to complete the high-temperature healing. After completion, the differential pressure fan 3 is turned off, and the exhaust fan 5 is turned on to discharge the chlorine dioxide gas with a fixed concentration into the chlorine dioxide recovery device 7. When the chlorine dioxide concentration sensor 11 detects that the chlorine dioxide concentration has dropped to a safe value, the temperature control fan 1 is turned on to control the temperature inside the device at 4℃. By lowering the temperature inside the device through the temperature control fan 1, the yam that has undergone chlorine dioxide sterilization-high temperature healing composite treatment can be stored in a constant temperature cold storage with a temperature controlled at 4℃ and a humidity of 85%-90%. This can extend the storage period of the yam to 60 days, maintain the appearance quality of its fresh-cut products, reduce browning, improve marketability, and extend the shelf life of fresh-cut yams to 8 days.

[0043] The specific implementation effects of the technical solution of the present invention will be further explained in conjunction with the embodiments. All the test materials used can be purchased through conventional means.

[0044] Example 1, Example of high-temperature callus treatment with chlorine dioxide:

[0045] Step 1: Select yams that are uniform in size, free from pests, diseases, and mechanical damage. Artificially injure the yams by cutting off both ends. Then place them in a solution of 5 mg·L⁻¹. -1 The yams were fumigated in a chlorine dioxide (ClO2) gas environment for 10 minutes. Then, they underwent high-temperature healing, with the temperature controlled at 35℃ and humidity at 85%-90% for 7 days. After treatment, the temperature was controlled at 4℃ and humidity at 85%-90% to maintain the core temperature of the yams at 4℃ before long-term storage. In this case, the yams were stored for 60 days, with observations every 15 days (0, 15, 30, 45, and 60 days) to determine the rot rate.

[0046] Step 2: Samples are taken every 15 days for fresh-cut processing and observation. Fresh-cut processing method: carried out at 4℃. Wash and peel the yam, then cut it into even segments (about 20 cm), place them in polyethylene (PE) preservation bags, and seal the bags. Store in a constant temperature cold storage at 4℃ for 8 days, observing every 2 days and measuring color difference and browning index.

[0047] Comparative Example 1, Comparative Example Blank Treatment Group:

[0048] Step 1: Select yams that are uniform in size, free from pests, diseases, and mechanical damage. Without any treatment, store them directly in a constant-temperature cold storage at 4℃ and 85%-90% humidity. In this case, the yams were stored for 60 days, and observations were made every 15 days to determine the rate of decay.

[0049] The comparative blank treatment group operates in the same way as the example in step 2.

[0050] Regarding the determination of rot rate in the above embodiments and comparative examples: the assessment of rot is based on the presence of obvious depressions and mycelia on the surface of the yam tuber, and the rot rate (%) = (number of rotten tubers / total number of tubers) × 100.

[0051] Regarding the color difference and browning index in the above embodiments and comparative examples: A CR-400 colorimeter was used to measure three points on the top, middle, and bottom parts of each fresh-cut yam to obtain the L*, a*, and b* values. The browning index (BI) is calculated as follows: BI = [100 × (x - 0.31)] / 0.172), where x = (a* + 1.75 L*) / (5.645 L* + a* - 3.012b*).

[0052] Please see Figure 2 Based on the appearance of the yams in the examples and comparative examples during storage, no rot occurred in the examples. On day 30 of storage, the comparative example showed obvious rot, which was clearly visible on the surface and cut surfaces of the yam tubers. On day 60 of storage, the rot in the comparative example worsened, with multiple areas of rot, and white and blue mycelia adhering to the surface of the rotten areas.

[0053] Please see Figure 3 According to the comparison of the rot rate of the yam in the example and the comparative example during storage, the rot rate of the example was extremely low during storage, only 3.33% on day 60. The rot rate of the comparative example increased significantly from day 30 of storage to 53.33%, reaching 100% on day 60.

[0054] Please see Figure 4The figure shows the appearance of fresh-cut yams in the embodiment and comparative examples of the present invention during their shelf life. The embodiment significantly maintained the appearance quality of the fresh-cut product during each storage period. On day 0 of the storage period, the comparative example's fresh-cut yams had a marketable shelf life of 6 days, and showed obvious browning and lost their marketability on day 8. As the storage time increased, the shelf life of the comparative example's fresh-cut yams shortened, reaching only 4 days on day 60. In contrast, the actual example maintained the appearance quality of the fresh-cut yams well throughout all storage periods, extending the shelf life of the fresh-cut yams to 8 days.

[0055] Please see Figure 5 The figure shows the color difference and browning index of fresh-cut yams from the embodiments and comparative examples of the present invention during their shelf life, consistent with their appearance. The L* value decreases with prolonged shelf life; the L* value of the embodiments is significantly higher than that of the comparative examples, with the difference widening significantly between day 45 and day 60. The a* and b* values ​​increase with prolonged shelf life; the a* and b* values ​​of the embodiments are significantly lower than those of the comparative examples, with the difference widening significantly between day 45 and day 60. The browning index (BI) increases with prolonged shelf life; the browning index of the embodiments is significantly lower than that of the comparative examples, and differences are observed in fresh-cut processed yams throughout the entire storage period. Fresh-cut yams processed on days 15 and 30 of the storage period show significant differences starting from day 6 of the shelf life, while fresh-cut yams processed on days 45 and 60 of the storage period show significant differences starting from day 4 of the shelf life. This indicates that the embodiments can effectively maintain the appearance quality of fresh-cut yam products stored for extended periods and delay browning.

[0056] As can be seen, the embodiments are superior to the comparative examples. The yam preservation device combining high-temperature callus removal and chlorine dioxide sterilization equipment of the present invention significantly reduces the rot rate of yams during storage and extends the storage period; it effectively ensures the appearance quality of subsequent fresh-cut processed products, reduces browning, and maintains marketability. In summary, the device of the present invention greatly improves the quality and storage period of yams.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A yam preservation device combining chlorine dioxide sterilization and high-temperature wound healing, characterized in that, Including: The chlorine dioxide generation and recovery unit is used to generate and recover chlorine dioxide gas; The high temperature and high humidity healing unit is used to provide a high temperature and high humidity environment to promote the healing of yam. The sensor monitoring unit is used to monitor environmental parameters in real time. The electrical control unit is used to control the coordinated operation of each unit. The cold storage (15) has a yam stacking area (12) inside, and is equipped with a door (13) and an insulation layer (8). The chlorine dioxide generation and recovery unit, the high-temperature and high-humidity wound healing unit, the sensor monitoring unit, and the electrical control unit are all integrated into the cold storage unit.

2. The yam preservation device based on chlorine dioxide sterilization and high-temperature wound healing as described in claim 1, characterized in that: The chlorine dioxide generation and recovery unit includes a chlorine dioxide generator (6), a chlorine dioxide recovery device (7), an exhaust fan (5), and a fresh air fan (16). The chlorine dioxide generator (6) is used to generate chlorine dioxide gas, the chlorine dioxide recovery device (7) is used to treat and recover waste gas, the exhaust fan (5) is used to discharge the gas in the storage room, and the fresh air fan (16) is used to introduce fresh air to regulate the composition of the gas in the storage room.

3. The yam preservation device based on chlorine dioxide sterilization and high-temperature wound healing as described in claim 1, characterized in that: The high temperature and high humidity wound healing unit includes a temperature control fan (1), a high pressure spray humidifier (2), a differential pressure fan (3), and a retractable air guide curtain (4). The temperature control fan (1) is used to heat the air inside the storage room, the high pressure spray humidifier (2) is used to increase the humidity inside the storage room, the differential pressure fan (3) is used to promote airflow circulation, and the retractable air guide curtain (4) is used to guide the airflow direction.

4. The yam preservation device based on chlorine dioxide sterilization and high-temperature wound healing as described in claim 1, characterized in that: The sensor monitoring unit includes a temperature sensor (9), a humidity sensor (10), a chlorine dioxide concentration sensor (11), and a pressure sensor (17). The temperature sensor (9) is used to monitor the temperature inside the storage room, the humidity sensor (10) is used to monitor the humidity inside the storage room, the chlorine dioxide concentration sensor (11) is used to monitor the concentration of chlorine dioxide gas, and the pressure sensor (17) is used to monitor the changes in pressure inside the storage room.

5. A yam preservation device based on chlorine dioxide sterilization and high-temperature wound healing according to any one of claims 1-4, characterized in that: The electrical control unit includes a PLC (14) and an electrical control box. The PLC (14) is used to receive sensor signals and control various actuators. The electrical control box has a built-in PLC (14) and is electrically connected to the temperature control fan (1), differential pressure fan (3), chlorine dioxide generator (6), high-pressure spray humidifier (2), exhaust fan (5), fresh air fan (16) and various sensors.

6. The yam preservation device based on chlorine dioxide sterilization and high-temperature wound healing as described in claim 3, characterized in that: The differential pressure fan (3) and the retractable air guide curtain (4) work together to form a negative pressure zone in the yam stacking area (12), guiding the high temperature and high humidity airflow and the airflow containing chlorine dioxide to pass evenly through the yam stack.

7. The yam preservation device based on chlorine dioxide sterilization and high-temperature wound healing as described in claim 2, characterized in that: The exhaust fan (5) is connected to the chlorine dioxide recovery device (7) to discharge the chlorine dioxide-containing gas after the treatment is completed and to carry out harmless treatment.

8. A yam preservation device based on chlorine dioxide sterilization and high-temperature wound healing according to any one of claims 1-7, characterized in that: The cold storage (15) is equipped with multiple yam stacking areas (12), each stacking area is equipped with an independent airflow structure, and the temperature control fan (1), chlorine dioxide generator (6), temperature sensor (9), humidity sensor (10), air pressure sensor (17), chlorine dioxide concentration sensor (11) and differential pressure fan (3) are all installed in the cold storage (15); the temperature sensor (9) is electrically connected to the temperature control fan (1), which is used to regulate the air temperature in the cold storage; the humidity sensor (10) is electrically connected to the high-pressure spray humidifier (2), which is used to regulate the air humidity in the cold storage; the chlorine dioxide concentration sensor (11) is electrically connected to the chlorine dioxide generator (6), which is used to provide chlorine dioxide gas in the cold storage; the air pressure sensor (17) is electrically connected to the fresh air fan (16), which is used to supplement the air in the cold storage.

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