Fruit and vegetable treatment device based on synergistic sterilization of short-wave ultraviolet rays and low-temperature plasmas

Abstract

The invention relates to the technical field of fruit and vegetable preservation and sterilization, in particular to a fruit and vegetable treatment device based on short-wave ultraviolet and low-temperature plasma synergistic sterilization, and the fruit and vegetable treatment device comprises a conveying device arranged on a rack, and the conveying device comprises a conveying belt arranged in the longitudinal direction of the rack; a hood which is integrally designed into a rectangular box body structure and is provided with an opening in the lower end is mounted on the rack; the two ends of the conveying belt extend to the outer sides of the two ends of the hood from the openings in the two ends of the hood respectively and form an input end and an output end respectively; a sterilizing space is formed between the conveying belt and the hood; an upper disinfecting and killing assembly is arranged above the conveying belt on the rack and corresponds to the disinfecting and killing space; a lower disinfecting and killing assembly is arranged below the conveying belt on the rack and corresponds to the disinfecting and killing space; the device has the characteristics that collaborative operation can be realized, the disinfection effect and quality are improved, and the device is suitable for industrial continuous treatment.

Description

Technical Field

[0001] This invention relates to the field of fruit and vegetable preservation and sterilization technology, and in particular to a fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma. Background Technology

[0002] Fruits and vegetables are an indispensable part of people's daily diet, and their freshness and safety are directly related to people's health. However, after harvesting, fruits and vegetables are very susceptible to spoilage due to contamination by external microorganisms (such as bacteria, fungi, and viruses), resulting in significant economic losses and resource waste.

[0003] To extend the shelf life of fruits and vegetables, postharvest sterilization technology has become a research hotspot. Traditional sterilization methods (such as chemical disinfectants and heat treatment) suffer from problems such as residual toxicity, nutrient loss, or high energy consumption. In recent years, ultraviolet light sterilization and low-temperature plasma sterilization have received widespread attention due to their advantages such as high efficiency, no residue, and environmental friendliness. However, single technologies still have significant limitations in practical applications, and innovative synergistic sterilization solutions are urgently needed. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma. This device combines the sterilization characteristics of short-wave ultraviolet light and low-temperature plasma, working synergistically to achieve efficient, automated sterilization, suitable for continuous industrial processing.

[0005] To achieve the above objectives, the present invention provides a fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma, comprising a conveyor device mounted on a frame, the conveyor device including a conveyor belt arranged longitudinally along the frame; a cover with an overall rectangular box structure and an open bottom is mounted on the frame; and the two ends of the conveyor belt extend from the openings at both ends of the cover to the outer sides of the cover, each forming an input end and an output end; characterized in that a sterilization space is formed between the conveyor belt and the cover; an upper sterilization component is provided above the conveyor belt on the frame and corresponding to the sterilization space; a lower sterilization component is provided below the conveyor belt on the frame and corresponding to the sterilization space; the upper sterilization component includes a first short-wave ultraviolet light generating unit and a first low-temperature plasma generating unit; the lower sterilization component includes a second short-wave ultraviolet light generating unit and a second low-temperature plasma generating unit.

[0006] In this way, the above-mentioned equipment uses a conveyor belt to transport fruits and vegetables. After being transported to the sterilization space, the first short-wave ultraviolet light generating unit and the first low-temperature plasma generating unit of the upper sterilization component, as well as the second short-wave ultraviolet light generating unit and the second low-temperature plasma generating unit of the lower sterilization component, respectively sterilize the upper and lower surfaces of the fruits and vegetables. The combined effect of short-wave ultraviolet light (UVC, 222nm) and low-temperature plasma improves sterilization efficiency and extends the shelf life of fruits and vegetables. Furthermore, the front and rear ends of the conveyor belt can be connected to external conveyor lines, thereby realizing the automatic feeding of fruits and vegetables to be sterilized from the previous process and the automatic output of sterilized fruits and vegetables to the next process.

[0007] Furthermore, casters are installed at the four corners under the frame. These casters are swivel casters with locking mechanisms, which facilitate the movement and fixation of the equipment.

[0008] Furthermore, both the first and second short-wave ultraviolet (UV) light generating units utilize UV ​​lamps with a wavelength of 222nm. This wavelength ensures effective sterilization while being relatively gentle on the human body. The power and quantity of the first UV light generating unit, the first low-temperature plasma generating unit, the second UV light generating unit, and the second low-temperature plasma generating unit can be configured according to the size of the sterilization space and sterilization requirements, and their operation, shutdown, and power adjustment can be controlled by a control system.

[0009] As an optimization, the first short-wave ultraviolet generating unit and the first low-temperature plasma generating unit are multiple units arranged side by side along the longitudinal direction of the frame, and the first short-wave ultraviolet generating unit and the first low-temperature plasma generating unit are arranged alternately.

[0010] The second shortwave ultraviolet generation unit and the second low-temperature plasma generation unit are multiple units arranged side by side along the longitudinal direction of the frame, and the second shortwave ultraviolet generation unit and the second low-temperature plasma generation unit are arranged alternately.

[0011] In this way, the first short-wave ultraviolet generation unit and the first low-temperature plasma generation unit are arranged alternately, and the second short-wave ultraviolet generation unit and the second low-temperature plasma generation unit are arranged alternately, which can better achieve time-coupling disinfection of the upper and lower surfaces of fruits and vegetables, and improve disinfection efficiency and quality.

[0012] As an optimization, the first short-wave ultraviolet generating unit and the second low-temperature plasma generating unit are arranged in a one-to-one correspondence in the vertical direction; the first low-temperature plasma generating unit and the second short-wave ultraviolet generating unit are arranged in a one-to-one correspondence in the vertical direction.

[0013] This arrangement is more reasonable and can achieve coordinated disinfection from top to bottom, thus improving the disinfection effect.

[0014] As an optimization, the first low-temperature plasma generating unit includes a first constant-flow fan and a first low-temperature plasma generator, with the first constant-flow fan positioned above the first low-temperature plasma generator; and each of the first constant-flow fans is arranged facing the second short-wave ultraviolet generating unit; the second low-temperature plasma generating unit includes a second constant-flow fan and a second low-temperature plasma generator, with the second constant-flow fan positioned below the second low-temperature plasma generator; and each of the second constant-flow fans is arranged facing the first short-wave ultraviolet generating unit.

[0015] In this way, the air generated by the first constant-flow fan combines with the plasma generated by the first low-temperature plasma generator to form plasma wind, which is then directed onto the surface of the fruits and vegetables to be disinfected, ensuring full contact and improving the disinfection effect. Simultaneously, the first constant-flow fan cools the second short-wave ultraviolet light generating unit, extending its service life. Similarly, the air generated by the second constant-flow fan combines with the plasma generated by the second low-temperature plasma generator to form plasma wind, which, after passing through the conveyor belt, is directed onto the surface of the fruits and vegetables to be disinfected, ensuring full contact and improving the disinfection effect. Furthermore, the second constant-flow fan also cools the first short-wave ultraviolet light generating unit, extending its service life.

[0016] As an optimization, the conveyor belt is designed with a mesh structure.

[0017] This allows light and air to pass through, facilitating full contact between short-wave ultraviolet rays and low-temperature plasma and fruits and vegetables.

[0018] As an optimization, a lifting column is installed on the frame, and an installation frame is installed on the upper end of the lifting column. The aforementioned disinfection components are installed on the installation frame.

[0019] In this way, the upper disinfection component is installed on the lifting column, which can move up and down with the lifting column to adjust the height position from the conveyor belt to adapt to different sizes of fruits and vegetables.

[0020] As an optimization, the conveying device includes a drive roller and a driven roller mounted on a frame, with the conveyor belt wound around the drive roller and the driven roller; and two tension rollers are arranged in pairs below the inner side of the drive roller and the driven roller on the frame, such that the two tension rollers, the drive roller and the driven roller are arranged in an isosceles trapezoidal shape; and the lower side of the conveyor belt is wound around the two tension rollers; and the lower disinfection component is installed inside the isosceles trapezoid formed by the conveyor belt.

[0021] This simplifies the design of the conveyor system, and the designed tension rollers can tension the conveyor belt, improving the reliability of the conveyor. Secondly, the layout of the two tension rollers, the drive roller, and the driven roller allows for better space to be created between the upper and lower sides of the conveyor belt for arranging the disinfection components.

[0022] Furthermore, a drive motor is installed on the frame, a drive sprocket is installed on the motor shaft of the drive motor, a driven sprocket is installed on the drive roller, and a chain is wound between the drive sprocket and the driven sprocket.

[0023] Furthermore, the tension roller, the driving roller, and the driven roller each have bearings at both ends, and each is mounted on a bearing seat on the frame.

[0024] As an optimization, an installation shaft is installed on the outer side of one of the inclined sections of the conveyor belt, and a cleaning roller brush with an integral cylindrical shape is installed on the installation shaft, such that the bristles of the cleaning roller brush are in contact with the outer side of the inclined section of the conveyor belt.

[0025] Furthermore, the bristles of the cleaning roller are made of a soft material.

[0026] In this way, the bristles of the cleaning roller brush remain in contact with the conveyor belt. When the conveyor belt moves, the friction causes the cleaning roller brush to rotate. The cleaning roller brush completes the cleaning of the conveyor belt during the rotational contact process with the conveyor belt.

[0027] Furthermore, the two ends of the mounting shaft used to install the cleaning roller brush are installed in bearing housings, which are fixed to the mounting plate on the frame by bolts and nuts. The mounting holes of the bearing housings on the mounting plate are designed as elongated elliptical holes. When the cleaning roller brush is freshly painted or worn, the degree of contact between the cleaning roller brush and the conveyor belt can be adjusted by adjusting the installation position of the bearing housings in the elongated elliptical holes on the mounting plate.

[0028] As an optimization, a bottom cover assembly is provided on the outer periphery of the frame. The bottom cover assembly includes a bottom cover housing and a pair of bottom cover access doors arranged on one side of the bottom cover housing.

[0029] In this way, the bottom cover inspection door can be opened and closed manually, which facilitates the maintenance and repair of the lower disinfection components and other equipment.

[0030] As an optimization, the hood includes a front hood assembly, a middle hood assembly, and a rear hood assembly.

[0031] Furthermore, the front cover assembly includes a front cover housing, a front height adjustment plate is provided at the front end of the front cover housing, and an ozone sensor, a first axial flow fan, a first ozone filter assembly, a touch screen, a status indicator light and a start / stop button are also provided on the front cover housing.

[0032] In this way, the height adjustment plate is fixed to the front cover housing by hand-tightening screws, and forms a relatively closed disinfection space with the middle cover assembly; the height adjustment plate is designed with elongated oval holes. After loosening the hand-tightening screws, the height adjustment plate can move up and down along the hand-tightening screws through the elongated oval holes to adapt to different fruit and vegetable sizes.

[0033] Furthermore, an axial flow fan and ozone filter assembly are installed on the top of the front housing. The axial flow fan can be set to be normally on or controlled automatically via ozone sensor feedback. When the ozone sensor detects that the ozone concentration exceeds the standard, the control system sends a control signal, the axial flow fan starts, and the overflowing ozone is drawn upwards, decomposed by the ozone filter assembly, and then discharged into the air. This reduces the impact of excessive ozone concentration on operators. After powering on, the touch screen automatically enters the disinfection mode selection interface, where users can choose to use the built-in disinfection scheme or a custom disinfection scheme. Status indicator lights indicate the current operating status of the equipment; the start / stop button physically starts and stops the equipment to ensure safe use.

[0034] Furthermore, the middle cover assembly includes a middle cover shell, with an inspection door of an overall L-shaped structure on each side of the middle cover shell; a second axial flow fan and a second ozone filter assembly are also provided on the middle cover shell.

[0035] Furthermore, a second axial flow fan and a second ozone filter assembly are installed on the upper part of the middle housing, and an ozone sensor is configured inside the middle housing.

[0036] Based on sensor feedback, the control system automatically starts and stops the axial flow fan. When the axial flow fan is running, ozone is drawn upwards, decomposed by the ozone filter assembly, and then released into the air. This maintains the ozone concentration within the disinfection space within a certain range, preventing ozone overflow and its potential impact on operators. The access door can be opened and closed manually for easy maintenance and repair of the internal disinfection components.

[0037] Furthermore, temperature sensors, humidity sensors, ozone sensors, and plasma sensors are also installed inside the inner casing.

[0038] In this way, the internal status can be monitored in real time, and the monitored data can be transmitted to the control system in real time. The control system adjusts the operation of each device according to the preset parameter range to ensure the stability and reliability of the sterilization process.

[0039] Furthermore, the tail cover assembly includes a tail cover housing, and a rear height adjustment plate is provided at the rear end of the tail cover housing; an electrical control cabinet access door and a cooling fan are also provided on the tail cover housing.

[0040] Furthermore, the rear height adjustment plate is fixed to the front cover housing with hand-tightened screws, forming a relatively enclosed disinfection space with the middle cover assembly. The height adjustment plate is designed with elongated oval holes. After loosening the hand-tightened screws, the rear height adjustment plate can move up and down along the hand-tightened screws through the elongated oval holes to accommodate different sizes of fruits and vegetables. The rear cover housing houses the equipment's electrical control center, where electrical control system components are centrally installed for centralized management. The electrical control cabinet's inspection door can be manually opened and closed for easy maintenance and repair of internal components. A cooling fan is installed on the side of the rear cover housing. The cooling fan automatically starts and stops based on feedback from a temperature sensor built into the rear cover housing to prevent excessively high temperatures inside the electrical control cabinet from affecting the stability of equipment operation.

[0041] In summary, the aforementioned equipment is primarily used for post-harvest sterilization and preservation of fruits and vegetables. It combines the synergistic effects of short-wave ultraviolet light (UVC, 222nm) and low-temperature plasma to improve sterilization efficiency, extend the shelf life of fruits and vegetables, and is suitable for continuous industrial processing. Furthermore, through layout and design, the entire system can better improve sterilization effectiveness and quality, as well as extend its service life and applicability. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma in a specific embodiment of the present invention.

[0043] Figure 2 yes Figure 1 A schematic diagram of the structure after rotation by one angle.

[0044] Figure 3 yes Figure 1 A schematic diagram of the structure after rotating it to another angle.

[0045] Figure 4 yes Figure 1 Front view diagram.

[0046] Figure 5 yes Figure 1 A top-down view.

[0047] Figure 6 yes Figure 1 A structural diagram omitting the external covering.

[0048] Figure 7 yes Figure 1 A schematic diagram showing the positions of the upper and middle disinfection components, the conveyor belt, and the lower disinfection component.

[0049] Figure 8 yes Figure 7 A top-down view of the upper and lower disinfection components.

[0050] Figure 9 yes Figure 7 Schematic diagram of the first and second low-temperature plasma generating units.

[0051] Figure 10 yes Figure 1 A structural diagram of the frame section.

[0052] Figure 11 yes Figure 10 A magnified view of a portion of position A in the diagram.

[0053] Figure 12 yes Figure 10 A schematic diagram of the conveyor system.

[0054] Figure 13 yes Figure 1 A schematic diagram of the bottom cover assembly.

[0055] Figure 14 yes Figure 1 A schematic diagram of the front cover assembly.

[0056] Figure 15 yes Figure 1 A schematic diagram of the middle cover component.

[0057] Figure 16 yes Figure 1 A schematic diagram of the tail cover assembly. Detailed Implementation

[0058] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] like Figures 1 to 16As shown, a fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma includes a conveying device mounted on a frame 1, the conveying device including a conveyor belt 2 arranged longitudinally along the frame; a cover 3 with an overall rectangular box structure and an open bottom is installed on the frame; the two ends of the conveyor belt extend from the openings at both ends of the cover to the outside of the cover, forming an input end and an output end respectively; a sterilization space 4 is formed between the conveyor belt and the cover; an upper sterilization component 5 is arranged above the conveyor belt on the frame and corresponding to the sterilization space; a lower sterilization component 6 is arranged below the conveyor belt on the frame and corresponding to the sterilization space; the upper sterilization component includes a first short-wave ultraviolet light generating unit 7 and a first low-temperature plasma generating unit 8; the lower sterilization component includes a second short-wave ultraviolet light generating unit 9 and a second low-temperature plasma generating unit 10.

[0060] In this way, the above-mentioned equipment uses a conveyor belt to transport fruits and vegetables. After being transported to the sterilization space, the first short-wave ultraviolet light generating unit and the first low-temperature plasma generating unit of the upper sterilization component, as well as the second short-wave ultraviolet light generating unit and the second low-temperature plasma generating unit of the lower sterilization component, respectively sterilize the upper and lower surfaces of the fruits and vegetables. The combined effect of short-wave ultraviolet light (UVC, 222nm) and low-temperature plasma improves sterilization efficiency and extends the shelf life of fruits and vegetables. Furthermore, the front and rear ends of the conveyor belt can be connected to external conveyor lines, thereby realizing the automatic feeding of fruits and vegetables to be sterilized from the previous process and the automatic output of sterilized fruits and vegetables to the next process.

[0061] Furthermore, casters 11 are installed at the four corners below the frame. The casters are swivel casters with locking mechanisms to facilitate the movement and fixation of the equipment.

[0062] Furthermore, both the first and second short-wave ultraviolet (UV) light generating units utilize UV ​​lamps with a wavelength of 222nm. This wavelength ensures effective sterilization while being relatively gentle on the human body. The power and quantity of the first UV light generating unit, the first low-temperature plasma generating unit, the second UV light generating unit, and the second low-temperature plasma generating unit can be configured according to the size of the sterilization space and sterilization requirements, and their operation, shutdown, and power adjustment can be controlled by a control system.

[0063] In this specific embodiment, the first short-wave ultraviolet generating unit and the first low-temperature plasma generating unit are both multiple units arranged side by side along the longitudinal direction of the frame, and the first short-wave ultraviolet generating unit and the first low-temperature plasma generating unit are alternately arranged; the second short-wave ultraviolet generating unit and the second low-temperature plasma generating unit are both multiple units arranged side by side along the longitudinal direction of the frame, and the second short-wave ultraviolet generating unit and the second low-temperature plasma generating unit are alternately arranged.

[0064] In this way, the first short-wave ultraviolet generation unit and the first low-temperature plasma generation unit are arranged alternately, and the second short-wave ultraviolet generation unit and the second low-temperature plasma generation unit are arranged alternately, which can better achieve time-coupling disinfection of the upper and lower surfaces of fruits and vegetables, and improve disinfection efficiency and quality.

[0065] In this specific embodiment, the first shortwave ultraviolet generating unit and the second low-temperature plasma generating unit are arranged in a one-to-one correspondence in the vertical direction; the first low-temperature plasma generating unit and the second shortwave ultraviolet generating unit are arranged in a one-to-one correspondence in the vertical direction.

[0066] This arrangement is more reasonable and can achieve coordinated disinfection from top to bottom, thus improving the disinfection effect.

[0067] In this specific embodiment, the first low-temperature plasma generating unit includes a first constant-flow fan 12 and a first low-temperature plasma generator 13, with the first constant-flow fan positioned above the first low-temperature plasma generator; and each of the first constant-flow fans is arranged facing the second short-wave ultraviolet generating unit; the second low-temperature plasma generating unit includes a second constant-flow fan 14 and a second low-temperature plasma generator 15, with the second constant-flow fan positioned below the second low-temperature plasma generator; and each of the second constant-flow fans is arranged facing the first short-wave ultraviolet generating unit.

[0068] In this way, the air generated by the first constant-flow fan combines with the plasma generated by the first low-temperature plasma generator to form plasma wind, which is then directed onto the surface of the fruits and vegetables to be disinfected, ensuring full contact and improving the disinfection effect. Simultaneously, the first constant-flow fan cools the second short-wave ultraviolet light generating unit, extending its service life. Similarly, the air generated by the second constant-flow fan combines with the plasma generated by the second low-temperature plasma generator to form plasma wind, which, after passing through the conveyor belt, is directed onto the surface of the fruits and vegetables to be disinfected, ensuring full contact and improving the disinfection effect. Furthermore, the second constant-flow fan also cools the first short-wave ultraviolet light generating unit, extending its service life.

[0069] In this specific embodiment, the conveyor belt has a mesh structure design.

[0070] This allows light and air to pass through, facilitating full contact between short-wave ultraviolet rays and low-temperature plasma and fruits and vegetables.

[0071] In this specific embodiment, a lifting column 16 is provided on the frame, an installation frame 17 is installed on the upper end of the lifting column, and the above-mentioned disinfection component is installed on the installation frame.

[0072] In this way, the upper disinfection component is installed on the lifting column, which can move up and down with the lifting column to adjust the height position from the conveyor belt to adapt to different sizes of fruits and vegetables.

[0073] In this specific embodiment, the conveying device includes a drive roller 18 and a driven roller 19 mounted on a frame, with the conveyor belt wound around the drive roller and the driven roller; and two tension rollers 20 are arranged in pairs below the inner side of the drive roller and the driven roller on the frame, such that the two tension rollers, the drive roller and the driven roller are arranged in an isosceles trapezoidal shape; and the lower side of the conveyor belt is wound around the two tension rollers; and the lower disinfection component is installed inside the isosceles trapezoid formed by the conveyor belt.

[0074] This simplifies the design of the conveyor system, and the designed tension rollers can tension the conveyor belt, improving the reliability of the conveyor. Secondly, the layout of the two tension rollers, the drive roller, and the driven roller allows for better space to be created between the upper and lower sides of the conveyor belt for arranging the disinfection components.

[0075] Furthermore, a drive motor 21 is installed on the frame, a drive sprocket 22 is installed on the motor shaft of the drive motor, a driven sprocket 23 is installed on the drive roller, and a chain 24 is wound between the drive sprocket and the driven sprocket.

[0076] Furthermore, the tension roller, the driving roller, and the driven roller each have bearings at both ends, and each is mounted on a bearing seat 25 on the frame.

[0077] In this specific embodiment, an installation shaft 26 is installed on the outer side of one of the inclined sections of the conveyor belt, and a cleaning roller brush 27 with an integral cylindrical shape is installed on the installation shaft, such that the bristles of the cleaning roller brush are in contact with the outer side of the inclined section of the conveyor belt.

[0078] Furthermore, the bristles of the cleaning roller are made of a soft material.

[0079] In this way, the bristles of the cleaning roller brush remain in contact with the conveyor belt. When the conveyor belt moves, the friction causes the cleaning roller brush to rotate. The cleaning roller brush completes the cleaning of the conveyor belt during the rotational contact process with the conveyor belt.

[0080] Furthermore, the two ends of the mounting shaft used for installing the cleaning roller brush are installed in bearing seats, which are fixed to the mounting plate 28 on the frame by bolts and nuts; the mounting holes of the bearing seats on the mounting plate are designed as elongated elliptical holes 29; when the cleaning roller brush is freshly painted or worn, the degree of contact between the cleaning roller brush and the conveyor belt can be adjusted by adjusting the installation position of the bearing seats in the elongated elliptical holes on the mounting plate.

[0081] In this specific embodiment, a bottom cover assembly 30 is provided on the outer peripheral surface of the frame. The bottom cover assembly includes a bottom cover housing and a pair of bottom cover inspection doors 31 arranged on one side of the bottom cover housing.

[0082] In this way, the bottom cover inspection door can be opened and closed manually, which facilitates the maintenance and repair of the lower disinfection components and other equipment.

[0083] In this specific embodiment, the hood includes a front hood assembly 32, a middle hood assembly 33, and a rear hood assembly 34.

[0084] Furthermore, the front cover assembly includes a front cover housing 35, a front height adjustment plate 36 is provided at the front end of the front cover housing, and an ozone sensor 37, a first axial flow fan 38, a first ozone filter assembly 39, a touch screen 40, a status indicator light 41, and a start / stop button 42 are also provided on the front cover housing.

[0085] In this way, the height adjustment plate is fixed to the front cover housing by hand-tightening screws, and forms a relatively closed disinfection space with the middle cover assembly; the height adjustment plate is designed with elongated oval holes. After loosening the hand-tightening screws, the height adjustment plate can move up and down along the hand-tightening screws through the elongated oval holes to adapt to different fruit and vegetable sizes.

[0086] Furthermore, an axial flow fan and ozone filter assembly are installed on the top of the front housing. The axial flow fan can be set to be normally on or controlled automatically via ozone sensor feedback. When the ozone sensor detects that the ozone concentration exceeds the standard, the control system sends a control signal, the axial flow fan starts, and the overflowing ozone is drawn upwards, decomposed by the ozone filter assembly, and then discharged into the air. This reduces the impact of excessive ozone concentration on operators. After powering on, the touch screen automatically enters the disinfection mode selection interface, where users can choose to use the built-in disinfection scheme or a custom disinfection scheme. Status indicator lights indicate the current operating status of the equipment; the start / stop button physically starts and stops the equipment to ensure safe use.

[0087] Furthermore, the middle cover assembly includes a middle cover housing 43, with an inspection door 44 of an overall L-shaped structure on each side of the middle cover housing; a second axial flow fan 45 and a second ozone filter assembly 46 are also provided on the middle cover housing.

[0088] Furthermore, a second axial flow fan and a second ozone filter assembly are installed on the upper part of the middle housing, and an ozone sensor is configured inside the middle housing.

[0089] Based on sensor feedback, the control system automatically starts and stops the axial flow fan. When the axial flow fan is running, ozone is drawn upwards, decomposed by the ozone filter assembly, and then released into the air. This maintains the ozone concentration within the disinfection space within a certain range, preventing ozone overflow and its potential impact on operators. The access door can be opened and closed manually for easy maintenance and repair of the internal disinfection components.

[0090] Furthermore, temperature sensors, humidity sensors, ozone sensors, and plasma sensors are also installed inside the inner casing.

[0091] In this way, the internal status can be monitored in real time, and the monitored data can be transmitted to the control system in real time. The control system adjusts the operation of each device according to the preset parameter range to ensure the stability and reliability of the sterilization process.

[0092] Furthermore, the tail cover assembly includes a tail cover housing 47, and a rear height adjustment plate 48 is provided at the rear end of the tail cover housing; an electrical control cabinet access door 49 and a cooling fan 50 are also provided on the tail cover housing.

[0093] Furthermore, the rear height adjustment plate is fixed to the front cover housing with hand-tightened screws, forming a relatively enclosed disinfection space with the middle cover assembly. The height adjustment plate is designed with elongated oval holes. After loosening the hand-tightened screws, the rear height adjustment plate can move up and down along the hand-tightened screws through the elongated oval holes to accommodate different sizes of fruits and vegetables. The rear cover housing houses the equipment's electrical control center, where electrical control system components are centrally installed for centralized management. The electrical control cabinet's inspection door can be manually opened and closed for easy maintenance and repair of internal components. A cooling fan is installed on the side of the rear cover housing. The cooling fan automatically starts and stops based on feedback from a temperature sensor built into the rear cover housing to prevent excessively high temperatures inside the electrical control cabinet from affecting the stability of equipment operation.

[0094] When the equipment is working, press the start / stop button to power on the equipment. After powering on, the touch screen will automatically enter the disinfection mode selection interface, where users can choose between the built-in disinfection scheme or a custom disinfection scheme. After setting the disinfection scheme via the touch screen, the control system controls the conveyor line, upper disinfection component, and lower disinfection component to operate according to the set parameters. Adjust the front and rear height adjustment plates to appropriate heights according to the size of the fruits and vegetables to be disinfected, forming a relatively enclosed disinfection space with the middle cover component. Place the fruits and vegetables to be disinfected at the conveyor belt inlet. The fruits and vegetables will enter the disinfection space with the conveyor belt, be disinfected by the upper and lower disinfection components, and then flow out from the conveyor belt outlet, completing the disinfection process.

[0095] The conveyor line disinfection mode enables continuous sterilization, improving sterilization efficiency.

[0096] The front and rear ends of the conveyor belt can be connected to external conveyor lines, thereby realizing the automatic feeding of fruits and vegetables to be disinfected from the previous process and the automatic output to the next process after disinfection.

[0097] During the disinfection process, the monitoring device built into the disinfection space transmits the monitored data to the control system in real time. The control system can fine-tune the operation of each device according to the preset parameter range to ensure the stability and reliability of the sterilization process.

[0098] In summary, the aforementioned equipment is primarily used for post-harvest sterilization and preservation of fruits and vegetables. It combines the synergistic effects of short-wave ultraviolet light (UVC, 222nm) and low-temperature plasma to improve sterilization efficiency, extend the shelf life of fruits and vegetables, and is suitable for continuous industrial processing. Furthermore, through layout and design, the entire system can better improve sterilization effectiveness and quality, as well as extend its service life and applicability.

[0099] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma, comprising a conveying device mounted on a frame, the conveying device including a conveyor belt arranged longitudinally along the frame; a cover with an overall rectangular box structure and an open bottom installed on the frame; and the conveyor belt extending from openings at both ends of the cover to the outside of both ends of the cover, each forming an input end and an output end; characterized in that... ； A disinfection space is formed between the conveyor belt and the machine cover; an upper disinfection component is provided above the conveyor belt on the frame and corresponding to the disinfection space; a lower disinfection component is provided below the conveyor belt on the frame and corresponding to the disinfection space; the upper disinfection component includes a first short-wave ultraviolet generating unit and a first low-temperature plasma generating unit; the lower disinfection component includes a second short-wave ultraviolet generating unit and a second low-temperature plasma generating unit.

2. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 1, characterized in that; The first short-wave ultraviolet generating unit and the first low-temperature plasma generating unit are multiple units arranged side by side along the longitudinal direction of the frame, and the first short-wave ultraviolet generating unit and the first low-temperature plasma generating unit are arranged alternately. The second shortwave ultraviolet generation unit and the second low-temperature plasma generation unit are multiple units arranged side by side along the longitudinal direction of the frame, and the second shortwave ultraviolet generation unit and the second low-temperature plasma generation unit are arranged alternately.

3. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 2, characterized in that; The first shortwave ultraviolet generating unit and the second low-temperature plasma generating unit are arranged in a one-to-one correspondence in the vertical direction; the first low-temperature plasma generating unit and the second shortwave ultraviolet generating unit are arranged in a one-to-one correspondence in the vertical direction.

4. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 3, characterized in that; The first low-temperature plasma generating unit includes a first constant-flow fan and a first low-temperature plasma generator, with the first constant-flow fan positioned above the first low-temperature plasma generator; and each of the first constant-flow fans is arranged facing the second short-wave ultraviolet generating unit; the second low-temperature plasma generating unit includes a second constant-flow fan and a second low-temperature plasma generator, with the second constant-flow fan positioned below the second low-temperature plasma generator; and each of the second constant-flow fans is arranged facing the first short-wave ultraviolet generating unit.

5. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 1, characterized in that; The conveyor belt has a mesh structure design.

6. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 1, characterized in that; A lifting column is installed on the frame, and an installation frame is installed on the upper end of the lifting column. The above-mentioned disinfection components are installed on the installation frame.

7. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 1, characterized in that; The conveying device includes a drive roller and a driven roller mounted on a frame, with the conveyor belt wound around the drive roller and the driven roller; and two tension rollers are arranged in pairs below the inner side of the drive roller and the driven roller on the frame, such that the two tension rollers, the drive roller and the driven roller are arranged in an isosceles trapezoidal shape; and the lower side of the conveyor belt is wound around the two tension rollers; and the lower disinfection component is installed inside the isosceles trapezoid formed by the conveyor belt.

8. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 7, characterized in that; An installation shaft is installed on the outer side of one of the inclined sections of the conveyor belt, and a cleaning roller brush with an integral cylindrical shape is installed on the installation shaft, such that the bristles of the cleaning roller brush are in contact with the outer side of the inclined section of the conveyor belt.

9. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 1, characterized in that; A bottom cover assembly is provided on the outer periphery of the frame. The bottom cover assembly includes a bottom cover housing and a pair of bottom cover access doors arranged on one side of the bottom cover housing.

10. The fruit and vegetable processing device based on the synergistic sterilization of short-wave ultraviolet light and low-temperature plasma as described in claim 1, characterized in that; The hood includes a front hood assembly, a middle hood assembly, and a rear hood assembly.

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