An agricultural product intelligent disinfection system and an agricultural product disinfection method

Abstract

The application discloses an agricultural product intelligent disinfecting and killing system and method, which comprises a disinfecting and killing cabin body, agricultural product input and output ports arranged at two ends of the disinfecting and killing cabin body respectively, and a conveying mechanism for moving agricultural products from the input port to the output port. An ozone micro-nano bubble generating device comprises an ozone generator, a gas-liquid mixing unit and a micro-nano bubble releaser. Ozone gas is mixed with water and then converted into ozone bubble water which is sprayed onto the surface of agricultural products. An agricultural product information acquisition unit acquires the variety information and the initial colony information of the surface of the agricultural products. A control unit calls corresponding target ozone concentration and target processing time length from a disinfecting and killing parameter database according to the recognition result, dynamically adjusts the gas production of the ozone generator and the conveying speed of the conveying mechanism according to the feedback signal of an ozone concentration detection unit, and automatically matches the disinfecting and killing parameters according to different agricultural product varieties, so that the ozone utilization efficiency and the disinfecting and killing effect are improved.

Description

Technical Field

[0001] This invention relates to the field of agricultural product storage technology, and in particular to an intelligent disinfection system and method for agricultural products. Background Technology

[0002] Agricultural products carry a large number of microorganisms on their surface after harvesting, including pathogens such as bacteria, fungi, and viruses. These microorganisms multiply rapidly during storage and transportation, causing spoilage and serious economic losses. Currently, commonly used methods for disinfecting agricultural products mainly include chemical disinfectant soaking, ultraviolet irradiation, and high-temperature heat treatment. Chemical disinfectant soaking leaves chemical residues, affecting food safety, and the discharge of disinfectant wastewater causes environmental pollution. Ultraviolet irradiation can only disinfect the directly exposed areas of agricultural products, leaving blind spots and being less effective at sterilizing irregularly shaped agricultural products. High-temperature heat treatment can easily cause heat damage to agricultural products, affecting their freshness and commercial value. Ozone has strong... Ozone, with its oxidizing properties, can destroy the cell structure of microorganisms and leaves no residue after decomposition, making it a relatively safe disinfectant. Existing ozone disinfection equipment often involves directly introducing ozone gas into a closed space to fumigate agricultural products. However, this method results in poor penetration and wetting of ozone gas on the surface of agricultural products, leading to insufficient sterilization. While ozone water can be sprayed onto agricultural products, the resulting bubbles are large with limited surface area, resulting in low ozone dissolution and release efficiency in water and low ozone utilization. Furthermore, using uniform disinfection parameters for different agricultural products lacks targeted adjustment capabilities, easily leading to insufficient or excessive disinfection of some varieties.

[0003] Therefore, it is necessary to provide a new intelligent disinfection system and method for agricultural products to solve the above-mentioned technical problems. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an intelligent disinfection system and method for agricultural products.

[0005] This invention provides an intelligent disinfection system for agricultural products, comprising:

[0006] The disinfection chamber is a box structure. One end of the disinfection chamber is provided with an agricultural product inlet, and the other end of the disinfection chamber away from the agricultural product inlet is provided with an agricultural product outlet. A conveying mechanism is provided between the agricultural product inlet and the agricultural product outlet, and the conveying mechanism is used to carry the agricultural products from the inlet to the outlet.

[0007] An ozone micro-nano bubble generator is installed on the disinfection chamber. The ozone micro-nano bubble generator includes an ozone generator, a gas-liquid mixing unit, and a micro-nano bubble releaser connected in sequence. The ozone generator is used to prepare ozone gas. The gas-liquid mixing unit is used to mix ozone gas with water to form an ozone gas-liquid mixture. The micro-nano bubble releaser is located inside the disinfection chamber and above the conveying mechanism. It is used to convert the ozone gas-liquid mixture into ozone bubble water and spray it onto the surface of agricultural products.

[0008] An ozone concentration detection unit is installed inside the disinfection chamber to detect the ozone gas concentration inside the disinfection chamber and the dissolved ozone concentration in the ozone bubble water in real time, and outputs a detection signal.

[0009] An agricultural product information collection unit is located on one side of the agricultural product input port. It is used to collect the variety information and initial surface colony information of the agricultural product to be disinfected, and output the collection signal.

[0010] The control unit is electrically connected to the ozone micro-nano bubble generator, the ozone concentration detection unit, and the agricultural product information acquisition unit, respectively. The control unit has a built-in storage medium that stores a database of disinfection parameters corresponding to various agricultural product varieties. The control unit identifies the agricultural product variety based on the acquired signals, retrieves the target ozone concentration and target treatment time corresponding to that variety from the disinfection parameter database, and dynamically adjusts the gas production of the ozone generator and the conveying speed of the conveying mechanism based on the detection signal fed back by the ozone concentration detection unit.

[0011] Preferably, the gas-liquid mixing unit is a Venturi jet injector. The air inlet of the Venturi jet injector is connected to the ozone generator. A return pipe is connected between the water inlet of the Venturi jet injector and the disinfection chamber. The output end of the Venturi jet injector is connected to the micro-nano bubble releaser. The Venturi jet injector uses the negative pressure generated by the high-speed flow of water to draw in ozone gas and form an ozone-liquid mixture.

[0012] Preferably, the micro-nano bubble releaser is a porous ceramic microporous aeration plate, the micropore diameter of which is 0.1μm to 10μm. The porous ceramic microporous aeration plate is disposed above the conveying mechanism, and the spraying direction of the porous ceramic microporous aeration plate is towards the agricultural products on the conveying mechanism. There are multiple porous ceramic microporous aeration plates, which are arranged at equal intervals along the movement direction of the conveying mechanism.

[0013] Preferably, the agricultural product information acquisition unit includes an image acquisition module and a spectral acquisition module. The image acquisition module is used to acquire image information of agricultural products to identify agricultural product varieties, and the spectral acquisition module is used to acquire hyperspectral information of the surface of agricultural products to obtain initial colony distribution characteristics.

[0014] Preferably, the top of the disinfection chamber is equipped with an exhaust gas decomposition device, which is connected to the internal space of the disinfection chamber. The exhaust gas decomposition device contains an ozone decomposition catalyst, which is used to decompose the residual ozone gas released after disinfection into oxygen and then release it into the atmosphere.

[0015] Preferably, the conveying mechanism is a mesh conveyor belt, and an inlet pipe is connected to the outer side of the disinfection chamber. A float valve is connected to one end of the inlet pipe extending into the interior of the disinfection chamber. The bottom of the interior of the disinfection chamber is an ozone water storage tank, which is connected to the inlet of the gas-liquid mixing unit through a return pipeline. A filter unit and a return pump are installed on the return pipeline. The filter unit is used to filter and recover impurities in the ozone water, and the return pump is used to pump the filtered ozone water back to the gas-liquid mixing unit.

[0016] Preferably, the disinfection chamber is further equipped with a temperature and humidity control module, which is electrically connected to the control unit. The control unit controls the temperature and humidity control module to adjust the temperature and humidity inside the disinfection chamber according to the temperature and humidity requirements corresponding to the agricultural product variety in the disinfection parameter database.

[0017] Preferably, a first shielding curtain is provided at the agricultural product inlet of the disinfection chamber, and a second shielding curtain is provided at the agricultural product outlet. The first and second shielding curtains are used to reduce the leakage of ozone gas inside the disinfection chamber into the external environment.

[0018] A method for disinfecting agricultural products includes the following steps:

[0019] S1: The agricultural products to be disinfected are sent into the disinfection chamber through the agricultural product input port, and the conveying mechanism carries the agricultural products to move towards the agricultural product output port;

[0020] S2: The agricultural product information collection unit collects the variety information and initial surface colony information of agricultural products and outputs the collection signal to the control unit;

[0021] S3: The control unit receives the collected signal, identifies the agricultural product variety, calls the disinfection parameter database corresponding to the variety in the storage medium, and extracts the target ozone concentration and target treatment time.

[0022] S4: The control unit starts the ozone micro-nano bubble generator according to the target ozone concentration. The ozone generator produces ozone gas. The gas-liquid mixing unit mixes the ozone gas with water to form an ozone gas-liquid mixture. The micro-nano bubble releaser converts the ozone gas-liquid mixture into ozone bubble water and sprays it onto the surface of agricultural products. At the same time, the ozone generator's gas production is adjusted in a closed loop according to the detection signal fed back by the ozone concentration detection unit, so that the ozone gas concentration in the disinfection chamber and the dissolved ozone concentration in the ozone bubble water are maintained within the target ozone concentration range.

[0023] S5: The control unit adjusts the conveying speed of the conveying mechanism according to the target processing time, so that the residence time of agricultural products in the disinfection chamber matches the target processing time.

[0024] S6: After disinfection, agricultural products are sent out of the disinfection chamber through the agricultural product output port, and the residual ozone gas is decomposed by the exhaust gas decomposition device and then discharged into the atmosphere.

[0025] Preferably, in step S3, if the control unit cannot identify the agricultural product variety, it calls the default disinfection parameters, which are the combination of parameters with the highest sterilization intensity among all varieties of disinfection parameters; in step S4, the control unit simultaneously controls the temperature and humidity adjustment module to adjust the temperature and humidity inside the disinfection chamber according to the target temperature value and target humidity value corresponding to the agricultural product variety in the disinfection parameter database.

[0026] Compared with related technologies, the intelligent disinfection system and method for agricultural products provided by this invention have the following beneficial effects:

[0027] This invention provides an intelligent disinfection system and method for agricultural products. Ozone gas is mixed with water using a Venturi jet injector, and then converted into micro-nano bubble water via a micro-nano bubble releaser. The small bubble size and large specific surface area allow for thorough contact with all parts of the agricultural product surface, enhancing the ozone's effectiveness in killing surface microorganisms. Porous ceramic microporous aeration plates are positioned above the conveying mechanism and evenly spaced along the conveying direction, with the spray direction directed towards the agricultural products, ensuring uniform coverage of the ozone bubble water across the entire conveyor belt. An agricultural product information acquisition unit uses an image acquisition module and a spectral acquisition module to acquire information on the variety of the agricultural products and the initial surface microbial distribution, respectively. The control unit retrieves the corresponding target ozone concentration and target treatment time from the disinfection parameter database based on the identification results. It also dynamically adjusts the gas production of the ozone generator and the conveying speed of the conveying mechanism based on the signal fed back by the ozone concentration detection unit, so as to achieve targeted treatment of different agricultural products. The return pipeline, filter unit and return pump circulate the ozone water collected at the bottom of the disinfection chamber to the gas-liquid mixing unit for reuse, thereby improving the utilization rate of water resources. The temperature and humidity control module adjusts the environmental parameters inside the chamber according to the temperature and humidity requirements in the database to provide suitable conditions for ozone disinfection. The exhaust gas decomposition device decomposes the escaped residual ozone into oxygen before emission, thus avoiding environmental pollution. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the intelligent disinfection system for agricultural products provided by the present invention;

[0030] Figure 2 This is an exploded structural diagram of the intelligent disinfection system for agricultural products provided by the present invention;

[0031] Figure 3 This is a schematic diagram of the ozone micro-nano bubble generator provided by the present invention.

[0032] Figure 4 A schematic diagram of the water inlet pipe and float valve provided by the present invention;

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of the micro / nano bubble releaser provided by the present invention;

[0034] Figure 6 This is a schematic diagram of the conveying mechanism provided by the present invention.

[0035] The diagram is labeled as follows: 1. Disinfection chamber; 2. Agricultural product input port; 3. Agricultural product output port; 4. Conveying mechanism; 5. Ozone micro-nano bubble generator; 6. Ozone generator; 7. Gas-liquid mixing unit; 8. Micro-nano bubble releaser; 9. Ozone concentration detection unit; 10. Agricultural product information acquisition unit; 11. Control unit; 12. Return pipeline; 13. Image acquisition module; 14. Spectrum acquisition module; 15. Exhaust gas decomposition device; 16. Water inlet pipe; 17. Float valve; 18. Filtration unit; 19. Return pump; 20. Temperature and humidity control module; 21. First shielding curtain; 22. Second shielding curtain. Detailed Implementation

[0036] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0037] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0038] To make the content of this invention easier to understand, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0039] In the specific implementation process, such as Figures 1-6 As shown, an intelligent disinfection system for agricultural products includes a disinfection chamber 1, an ozone micro-nano bubble generator 5, an ozone concentration detection unit 9, an agricultural product information acquisition unit 10, and a control unit 11.

[0040] The disinfection chamber 1 has a box-like structure. The inner wall of the disinfection chamber 1 is coated with an epoxy resin coating that is resistant to ozone corrosion. The left end of the disinfection chamber 1 has an agricultural product input port 2, and the right end has an agricultural product output port 3. Both the agricultural product input port 2 and the agricultural product output port 3 are rectangular openings. A first shielding curtain 21 is installed at the agricultural product input port 2, and a second shielding curtain 22 is installed at the agricultural product output port 3. The shielding curtains are made of ozone-resistant rubber material, with multiple curtain panels overlapping to reduce the leakage of ozone gas from the chamber to the external environment. The conveying mechanism 4 uses a stainless steel mesh conveyor belt, which facilitates the penetration of ozone-infused water through the belt surface to contact the lower surface of the agricultural products. The conveyor belt is driven by a variable frequency motor, which is electrically connected to a control unit 11. The control unit 11 changes the linear speed of the conveyor belt by adjusting the operating frequency of the variable frequency motor, thereby controlling the residence time of the agricultural products in the chamber. The conveyor belt extends horizontally from the agricultural product input port 2 to the agricultural product output port 3. The upper surface of the conveyor belt is the bearing surface, and the agricultural products are placed on the bearing surface and move with the conveyor belt.

[0041] An ozone micro-nano bubble generator 5 is installed on the disinfection chamber 1, including an ozone generator 6, a gas-liquid mixing unit 7, and a micro-nano bubble releaser 8. The ozone generator 6 is a dielectric barrier discharge ozone generator, using high-purity oxygen as the gas source, and generates ozone gas through high-voltage ionization. The gas production rate is adjusted by an analog signal output from the control unit 11, with an adjustment range of 0–200 g / h. The gas-liquid mixing unit 7 uses a Venturi jet injector. The air inlet of the Venturi jet injector is connected to the air outlet of the ozone generator 6 through an ozone-resistant silicone tube. The water inlet of the Venturi jet injector is connected to the ozone water storage tank at the bottom of the inner side of the disinfection chamber 1 through a return pipe 12. The output end of the Venturi jet injector is connected to the micro-nano bubble releaser 8 through a pressure-resistant pipe. The Venturi jet injector has a collector inside. The system consists of a constriction section, a throat section, and a diffusion section. When high-pressure water flows through the throat, negative pressure is generated, drawing in ozone gas and mixing it violently with the water flow to form an ozone-liquid mixture. The micro-nano bubble releaser 8 is a porous ceramic microporous aeration plate with a micropore diameter of 5 micrometers. The aeration plate has a rectangular plate structure, with a length of 600 mm, a width of 400 mm, and a thickness of 20 mm. There are 4 aeration plates, evenly spaced along the direction of the conveyor belt, with a spacing of 300 mm between adjacent aeration plates. Each aeration plate is horizontally installed 150 mm above the conveyor belt, with the spraying surface of the aeration plate facing downwards towards the agricultural products on the conveyor belt. The ozone-liquid mixture is cut into ozone bubbles with a diameter of micro-nano through the micropores of the aeration plate and sprayed downwards in the form of bubble water, evenly covering the surface of the agricultural products.

[0042] The ozone concentration detection unit 9 is located inside the disinfection chamber 1 and includes a gas phase ozone concentration sensor and a liquid phase dissolved ozone concentration sensor. The gas phase ozone concentration sensor is installed on the inner wall of the chamber near the agricultural product outlet 3 and uses electrochemical principles to detect the ozone concentration in the gas phase space inside the chamber. The liquid phase dissolved ozone concentration sensor is installed in the ozone water storage tank and uses the membrane electrode method to detect the concentration of dissolved ozone in the ozone water in real time. Both sensors output the detection value to the control unit 11 with a current signal of 4 to 20 mA.

[0043] The agricultural product information collection unit 10 is located on one side of the agricultural product input port 2, above the conveyor belt. The agricultural product information collection unit 10 includes an image acquisition module 13 and a spectral acquisition module 14. The image acquisition module 13 uses an industrial color camera with a resolution of 1920×1080 pixels. The camera lens is perpendicular to the agricultural products on the conveyor belt to collect visible light image information of the agricultural products. The spectral acquisition module 14 uses a hyperspectral imager with a spectral range of 400 to 1000 nanometers and a spectral resolution of 5 nanometers to collect hyperspectral reflectance information of the surface of the agricultural products. The image information and spectral information are transmitted together to the control unit 11 for processing.

[0044] The control unit 11 is an industrial computer with a built-in storage medium containing a database of disinfection parameters for various agricultural products. The database is indexed by product name, and each product corresponds to a set of disinfection parameters, including target gaseous ozone concentration, target liquid dissolved ozone concentration, target treatment time, target temperature, and target humidity. For example, for leafy vegetables, the target gaseous ozone concentration is 5–8 mg / m³, the target liquid dissolved ozone concentration is 1.0–1.5 mg / L, the target treatment time is 3–5 minutes, the target temperature is 15–18 degrees Celsius, and the target humidity is 85%–95%; for root vegetables, the target gaseous ozone concentration is 8–12 mg / m³, the target liquid dissolved ozone concentration is 1.0–1.5 mg / L, the target treatment time is 3–5 minutes, the target temperature is 15–18 degrees Celsius, and the target humidity is 85%–95%. The dissolved ozone concentration is 1.5–2.0 mg / L, the target treatment time is 5–8 minutes, the target temperature is 12–15 degrees Celsius, and the target humidity is 80%–90%. The control unit 11 extracts features from the acquired visible light images using an image recognition algorithm and compares them with the variety image feature library in the database to identify the specific variety of the current agricultural product. Then, it retrieves all the disinfection parameters corresponding to that variety from the database. If the control unit 11 cannot identify the variety of agricultural product, it automatically calls the default disinfection parameters. The default disinfection parameters use the combination of parameters with the highest sterilization intensity among all varieties, namely, a gas phase ozone concentration of 12 mg / m³, a liquid phase dissolved ozone concentration of 2.0 mg / L, and a treatment time of 8 minutes.

[0045] The top of the disinfection chamber 1 is equipped with an exhaust gas decomposition device 15. The air inlet of the exhaust gas decomposition device 15 is connected to the top space of the disinfection chamber 1 through a pipe. An axial flow fan is installed at the pipe inlet to draw the residual ozone gas escaping from the chamber into the exhaust gas decomposition device 15. The exhaust gas decomposition device 15 is filled with an ozone decomposition catalyst, which is activated carbon particles loaded with manganese dioxide. When the ozone gas flows through the catalyst bed, it is decomposed into oxygen. The decomposed gas is discharged into the atmosphere from the exhaust port of the exhaust gas decomposition device 15.

[0046] The outer side of the disinfection chamber 1 is connected to a water inlet pipe 16. One end of the water inlet pipe 16 is connected to an external water source, and the other end extends into the chamber and is connected to a float valve 17. The float of the float valve 17 floats on the water surface of the ozone water storage tank. When the water level drops, the float sinks and opens the valve to replenish clean water; when the water level rises to a set height, the float rises and closes the valve to stop replenishing water, thereby maintaining a constant liquid level in the storage tank. The ozone water storage tank is located at the bottom of the chamber and consists of the space below the conveyor belt, used for collecting... After spraying, the ozone water that falls into the water storage tank is connected to the inlet of the Venturi jet injector through the return pipe 12. The return pipe 12 is equipped with a filter unit 18 and a return pump 19 in sequence along the water flow direction. The filter unit 18 adopts a two-stage filtration structure. The first stage is a 100-mesh stainless steel filter screen to intercept large particulate impurities. The second stage is a 5-micron polypropylene melt-blown filter element to intercept fine suspended matter. The return pump 19 is an ozone-resistant magnetic drive pump that boosts the filtered ozone water back to the Venturi jet injector to realize the recycling of ozone water.

[0047] The disinfection chamber 1 is also equipped with a temperature and humidity control module 20. The temperature and humidity control module 20 includes an evaporator, a condenser, a compressor, an expansion valve, and a humidifier, forming a closed heat pump circulation system. The evaporator is installed on the inner wall of the chamber, while the condenser and compressor are installed on the outside of the chamber. The humidifier is an ultrasonic humidifier, installed on the top of the inner wall of the chamber. The temperature and humidity control module 20 is electrically connected to the control unit 11. The control unit 11 adjusts the operating frequency of the compressor and the output power of the humidifier through a PID control algorithm based on the target temperature and target humidity values ​​retrieved from the disinfection parameter database, so that the temperature and humidity inside the chamber are maintained within the target range.

[0048] When using this system to disinfect agricultural products, follow these steps: The operator places the agricultural products to be disinfected evenly on the conveyor belt. The conveyor belt carries the agricultural products into the disinfection chamber 1 through the inlet 2. After entering the chamber, the agricultural products first pass under the agricultural product information collection unit 10. The image acquisition module 13 captures visible light images of the agricultural products, and the spectrum acquisition module 14 collects hyperspectral information of the agricultural product surface. After receiving the image information, the control unit 11 executes the variety recognition algorithm, identifies the current variety as spinach, and then retrieves the corresponding disinfection parameters for spinach from the disinfection parameter database: target gas phase ozone concentration of 6 mg / m³, target liquid phase dissolved ozone concentration of 1.2 mg / L, target treatment time of 4 minutes, target temperature of 16 degrees Celsius, and target humidity of 90%.

[0049] Control unit 11 activates ozone micro-nano bubble generator 5 according to the retrieved parameters. Ozone generator 6 starts preparing ozone gas. Return pump 19 pumps water from the ozone water storage tank into a Venturi jet injector. The Venturi jet injector draws in ozone gas to form an ozone gas-liquid mixture. This mixture is then transported to four porous ceramic microporous aeration plates. The aeration plates convert the ozone gas-liquid mixture into micro-nano ozone bubble water, which is sprayed downwards onto the spinach surface on the conveyor belt. Simultaneously, control unit 11 activates the ozone concentration detection unit... The ozone generator 6 adjusts its output in real time based on the feedback signals of gaseous ozone concentration and liquid dissolved ozone concentration. When the gaseous ozone concentration is detected to be below 6 mg / m³ or the liquid dissolved ozone concentration is below 1.2 mg / L, the output of the ozone generator 6 is increased. When the gaseous ozone concentration is detected to be above 6 mg / m³ or the liquid dissolved ozone concentration is above 1.2 mg / L, the output of the ozone generator 6 is decreased, forming a closed-loop control to maintain the ozone concentration in the chamber within the target range.

[0050] The control unit 11 calculates the operating speed of the conveyor belt based on the target processing time of 4 minutes. The effective travel length of the conveyor belt from the agricultural product input port 2 to the agricultural product output port 3 is 6 meters, and the calculated linear speed of the conveyor belt is 1.5 meters / minute. The control unit 11 outputs frequency commands to the variable frequency motor to make the conveyor belt run at a constant speed of 1.5 meters / minute, ensuring that the spinach stays in the cabin for exactly 4 minutes.

[0051] During the disinfection process, the control unit 11 simultaneously outputs control commands to the temperature and humidity regulation module 20 based on the target temperature of 16 degrees Celsius and the target humidity of 90% corresponding to the spinach. The temperature and humidity regulation module 20 starts the heat pump circulation and ultrasonic humidification to control the temperature inside the chamber within the range of 16±1 degrees Celsius and the humidity within the range of 90%±5%.

[0052] The ozone bubble water sprayed onto the surface of the spinach drips into the ozone water storage tank below the conveyor belt under the action of gravity. After impurities are removed by the filter unit 18 on the return pipe 12, the ozone water in the storage tank is pumped back to the Venturi jet by the return pump 19 for recycling. The float valve 17 automatically replenishes clean water according to the liquid level in the storage tank to compensate for the water loss due to spraying and evaporation. The residual ozone gas that escapes into the space at the top of the tank during the disinfection process enters the exhaust gas decomposition device 15 under the suction action of the axial fan. After being decomposed into oxygen by the manganese dioxide catalyst, it is discharged into the atmosphere.

[0053] After 4 minutes of disinfection, the spinach is conveyed to the agricultural product outlet 3 by the conveyor belt, passes through the second shielding curtain 22 and is sent out of the disinfection chamber 1, completing the entire disinfection process. The operator collects the disinfected spinach at the agricultural product outlet 3 and transfers it to the subsequent packaging or processing steps. When the batch processing is completed, the control unit 11 automatically stops the operation of the ozone generator 6, the return pump 19 and the temperature and humidity control module 20, and the system enters the standby state.

[0054] For different varieties of agricultural products, simply repeat the above steps. The control unit 11 will automatically identify the variety and call up the corresponding disinfection parameters without requiring manual adjustment of any equipment parameters. For agricultural products whose varieties cannot be identified, the control unit 11 will automatically use the default high-intensity disinfection parameters to ensure that the disinfection effect is not lower than the minimum requirements. During the entire disinfection process, all operating parameters, sensor detection values ​​and alarm information are displayed in real time on the touch screen interface of the control unit 11 and automatically recorded in the local storage medium for subsequent traceability and data analysis.

[0055] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An intelligent disinfection system for agricultural products, characterized in that, include: The disinfection chamber (1) is a box structure. One end of the disinfection chamber (1) is provided with an agricultural product input port (2), and the other end of the disinfection chamber (1) away from the agricultural product input port (2) is provided with an agricultural product output port (3). A conveying mechanism (4) is provided between the agricultural product input port (2) and the agricultural product output port (3). An ozone micro-nano bubble generator (5) is disposed outside the disinfection chamber (1). The ozone micro-nano bubble generator (5) includes an ozone generator (6), a gas-liquid mixing unit (7), and a micro-nano bubble releaser (8) connected in sequence. The ozone generator (6) and the gas-liquid mixing unit (7) are disposed at the bottom of the disinfection chamber (1), and the micro-nano bubble releaser (8) is disposed inside the disinfection chamber (1) and above the conveying mechanism (4). An ozone concentration detection unit (9) is installed inside the disinfection chamber (1); An agricultural product information collection unit (10) is located on one side of the agricultural product input port (2); The control unit (11) is electrically connected to the ozone micro-nano bubble generator (5), the ozone concentration detection unit (9) and the agricultural product information collection unit (10), respectively. The control unit (11) has a built-in storage medium, which stores a database of disinfection parameters corresponding to agricultural product varieties.

2. The intelligent disinfection system for agricultural products according to claim 1, characterized in that: The gas-liquid mixing unit (7) is a Venturi jet, the air inlet of the Venturi jet is connected to the ozone generator (6), the water inlet of the Venturi jet is connected to the disinfection chamber (1) by a return pipe (12), and the output end of the Venturi jet is connected to the micro-nano bubble releaser (8).

3. The intelligent disinfection system for agricultural products according to claim 2, characterized in that: The micro-nano bubble releaser (8) is a porous ceramic microporous aeration plate. The micropore diameter of the porous ceramic microporous aeration plate is 0.1μm to 10μm. The porous ceramic microporous aeration plate is set above the conveying mechanism (4). The spraying direction of the porous ceramic microporous aeration plate is towards the agricultural products on the conveying mechanism (4). There are multiple porous ceramic microporous aeration plates, and the multiple porous ceramic microporous aeration plates are arranged at equal intervals along the movement direction of the conveying mechanism (4).

4. The intelligent disinfection system for agricultural products according to claim 1, characterized in that: The agricultural product information collection unit (10) includes an image acquisition module (13) and a spectrum acquisition module (14).

5. The intelligent disinfection system for agricultural products according to claim 1, characterized in that: The top of the disinfection chamber (1) is provided with an exhaust gas decomposition device (15), which is connected to the internal space of the disinfection chamber (1). The exhaust gas decomposition device (15) contains an ozone decomposition catalyst.

6. The intelligent disinfection system for agricultural products according to claim 2, characterized in that: The conveying mechanism (4) is a mesh conveyor belt. The outer side of the disinfection chamber (1) is connected to a water inlet pipe (16). One end of the water inlet pipe (16) extending into the interior of the disinfection chamber (1) is connected to a float valve (17). The bottom of the inner side of the disinfection chamber (1) is an ozone water storage tank. The ozone water storage tank is connected to the inlet of the gas-liquid mixing unit (7) through a return pipe (12). A filter unit (18) and a return pump (19) are installed on the return pipe (12).

7. The intelligent disinfection system for agricultural products according to claim 1, characterized in that: The disinfection chamber (1) is also equipped with a temperature and humidity control module (20), which is electrically connected to the control unit (11).

8. The intelligent disinfection system for agricultural products according to claim 1, characterized in that: The disinfection chamber (1) is equipped with a first shielding curtain (21) at the agricultural product input port (2) and a second shielding curtain (22) at the agricultural product output port (3).

9. A method for disinfecting agricultural products using the intelligent disinfection system for agricultural products according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1: The agricultural products to be disinfected are sent into the disinfection chamber (1) through the agricultural product input port (2), and the conveying mechanism (4) carries the agricultural products to move towards the agricultural product output port (3); S2: Agricultural product information collection unit (10) collects variety information and initial surface colony information of agricultural products and outputs collection signals to control unit (11). S3: The control unit (11) receives the collected signal, identifies the agricultural product variety, calls the disinfection parameter database corresponding to the variety in the storage medium, and extracts the target ozone concentration and target treatment time; S4: The control unit (11) starts the ozone micro-nano bubble generator (5) according to the target ozone concentration. The ozone generator (6) prepares ozone gas. The gas-liquid mixing unit (7) mixes ozone gas with water to form an ozone gas-liquid mixture. The micro-nano bubble releaser (8) converts the ozone gas-liquid mixture into ozone bubble water and sprays it onto the surface of agricultural products. At the same time, the gas production of the ozone generator (6) is adjusted in a closed loop according to the detection signal fed back by the ozone concentration detection unit (9) so that the ozone gas concentration in the disinfection chamber (1) and the dissolved ozone concentration in the ozone bubble water are maintained within the target ozone concentration range. S5: The control unit (11) adjusts the conveying speed of the conveying mechanism (4) according to the target processing time so that the residence time of agricultural products in the disinfection chamber (1) matches the target processing time. S6: After disinfection, the agricultural products are sent out of the disinfection chamber (1) through the agricultural product output port (3), and the residual ozone gas is decomposed by the tail gas decomposition device (15) and discharged into the atmosphere.

10. A method for disinfecting agricultural products according to claim 9, characterized in that: In step S3, if the control unit (11) cannot identify the agricultural product variety, it calls the default disinfection parameters, which are the combination of parameters with the highest sterilization intensity among all varieties of disinfection parameters; in step S4, the control unit (11) simultaneously controls the temperature and humidity adjustment module (20) to adjust the temperature and humidity inside the disinfection chamber (1) according to the target temperature value and target humidity value corresponding to the agricultural product variety in the disinfection parameter database.

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