A cold plasma fruit and vegetable fresh-keeping and sterilization system

Abstract

A cold plasma fruit and vegetable preservation and sterilization system relates to the field of food preservation technology. A conveyor belt passes beneath a cold plasma cyclone cleaner and then through a cold plasma slicing chamber. The cold plasma slicing chamber's feed and discharge ports are equipped with induction lift doors. A cold plasma slicing blade assembly is installed at the top of the chamber. A gas tank assembly supplies air to the cold plasma slicing chamber through a mixing chamber. The cold plasma cyclone cleaner's outer shell includes an upper cylindrical section and a lower conical section. A cover plate is installed on the top, and a cold plasma activated water generator is installed on the inner wall. The bottom end is configured as a discharge port with an on-off valve. The bottom end of the lower conical section is laterally connected to a circulation pump via a return pipe. The circulation pump is tangentially connected to the upper cylindrical section via a water inlet pipe. After being cleaned by the cold plasma cyclone cleaner, the fruits and vegetables are transported by a conveyor belt to the cold plasma slicing chamber for slicing. During slicing, the cold plasma directly acts on the cut surface of the fruits and vegetables, achieving excellent preservation and sterilization effects.

Description

Technical Field

[0001] The present invention relates to the technical field of food preservation, in particular to a cold plasma fruit and vegetable preservation and sterilization system. Background Art

[0002] Fruits and vegetables are important sources of vitamins and fiber in our daily diets. However, harvesting, transportation, and storage can lead to significant fruit and vegetable loss. The most critical issue affecting fruit and vegetable loss is spoilage. Over time, nutrients in fruits and vegetables gradually disappear. Maintaining the freshness and stability of fruits and vegetables has always been a pain point for the industry. Therefore, extending the shelf life of fruits and vegetables and maintaining their freshness to reduce loss is particularly important.

[0003] At present, cold plasma treatment has been proven to have great potential in food preservation and sterilization technology, and has become a modern trend in fruit and vegetable preservation and sterilization.

[0004] Cold plasma has the advantages of short processing time, high efficiency, safety, non-toxicity, and ease of operation. Cold plasma-activated water has excellent antibacterial activity against a variety of microorganisms. After soaking and rinsing with cold plasma-activated water, microorganisms on the surface of fruits and vegetables can be effectively killed, maintaining their firmness, delaying spoilage, and causing minimal negative impact on their physical and chemical qualities. However, due to the limited penetration of cold plasma into food and the small discharge gap, the popularity of cold plasma treatment in the fruit and vegetable industry is relatively low. To solve this problem, a fruit and vegetable preservation and sterilization system based on cold plasma treatment is urgently needed. By slicing, cold plasma is applied directly to the cut surface of fruits and vegetables to prevent oxidation and deterioration caused by contact with air, thereby ensuring the processing quality of fruits and vegetables. Summary of the Invention

[0005] To address the shortcomings of the background technology, the present invention provides a cold plasma fruit and vegetable preservation and sterilization system. After the fruits and vegetables are cleaned by a cold plasma cyclone cleaner, they are sent to a cold plasma slicing chamber by a conveyor belt for slicing. During slicing, the cold plasma directly acts on the cut surface of the fruits and vegetables, achieving better preservation and sterilization effects and helping to maintain the quality of the fruits and vegetables for a long time.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a cold plasma fruit and vegetable preservation and sterilization system, comprising a cold plasma slicing chamber, a cold plasma cyclone cleaner, a conveyor belt and a gas tank group, wherein the conveyor belt passes through the cold plasma slicing chamber after passing under the cold plasma cyclone cleaner, and the cold plasma slicing chamber comprises a slicing box and a cold plasma slicing knife group, the front and rear side walls of the slicing box are respectively provided with a feed port and a discharge port for the conveyor belt to pass through, and the feed port and the discharge port are respectively provided with an induction lifting door, the cold plasma slicing knife group is installed at the top of the slicing box and is driven and controlled by an up and down reciprocating displacement mechanism, and the cold plasma slicing knife group is composed of a plurality of slicing knives arranged in pairs and arranged in parallel along the front and rear directions. The invention relates to a slicing knife, wherein the slicing knife comprises a cold plasma emission device and a blade installed at the bottom thereof; an air outlet and an air inlet are respectively provided at the top and bottom of the slicing box; the gas tank group is connected to the mixing chamber through a pipeline and then the air is supplied to the slicing box through the air inlet; the cold plasma cyclone cleaner comprises a circulation pump, an outer shell, a water inlet pipe section and a cover plate; the outer shell comprises an upper cylindrical section and a lower conical section; the cover plate is installed on the top of the upper cylindrical section; a cold plasma activated water generator is installed on the inner wall of the lower conical section; the bottom end of the lower conical section is provided with a discharge port with an on-off valve; the water inlet end of the circulation pump is laterally connected to the bottom end of the lower conical section through a return pipe; the lower end of the water inlet pipe section is connected to the water outlet end of the circulation pump; and the upper end of the water inlet pipe section is tangentially connected to the upper cylindrical section.

[0007] Furthermore, a monitoring device is integrated on the slicing box, and the monitoring device displays the internal image of the slicing box in real time through a monitor, and monitors the discharge parameters of the cold plasma through the arrangement of sensors.

[0008] Furthermore, the return pipe of the cold plasma cyclone cleaner is provided with a three-way water distribution pipe, and the three-way water distribution pipe is provided with a solenoid valve and connected to the waste liquid tank.

[0009] Furthermore, a heating jacket is provided on the outside of the return pipe of the cold plasma cyclone cleaner.

[0010] Furthermore, the bottom of the discharge port of the shell with the on-off valve is connected to a wind tube, and the wind tube is connected to an external air drying device.

[0011] Furthermore, the conveyor belt adopts a servo-controlled chain plate conveyor belt, and the center position of each chain plate unit is processed with a groove for burying the blade. When the conveyor belt stops moving, all the blades of the cold plasma slicing knife group are arranged vertically opposite to the grooves of the corresponding chain plate unit.

[0012] Furthermore, the cold plasma emission device uses a dielectric barrier discharge reactor and is powered by an AC high-voltage power supply with a voltage range of 5.5-80kV. The dielectric barrier discharge reactor includes three parts: a ground electrode, a dielectric, and a flat electrode. The dielectric is clamped and fixed on both sides of the flat electrode. The blade is fixedly installed at the bottom of the dielectric and is spaced apart from the flat electrode. The two poles of the AC high-voltage power supply are respectively connected to the flat electrodes in the two paired slicing knives through wires and are also connected to the ground electrode. The waveforms generated by the two adjacent AC high-voltage power supplies in the cold plasma slicing knife group are alternately transformed.

[0013] Furthermore, the dielectric is fixed on both sides of the flat electrode by clamping two glass plates.

[0014] Furthermore, sealing strips are bonded to the bottom and both sides of the induction lifting door.

[0015] Furthermore, the up and down reciprocating displacement mechanism uses a driving motor as a power source, and controls the up and down reciprocating movement of the slicing knife of the cold plasma slicing knife group through a Scotch yoke connecting rod mechanism.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the overall structure of the present invention is simple and reasonable, and the use is convenient. The fruits and vegetables are cleaned by the cold plasma cyclone cleaner. A cold plasma activated water generator is arranged inside the cold plasma cyclone cleaner to generate plasma activated water to perform cyclone cleaning on the fruits and vegetables. The cleaned fruits and vegetables are then sent to the cold plasma slicing chamber for slicing via a conveyor belt. The slicing knife is provided with a cold plasma emission device, which can enable the cold plasma to directly act on the cut surface of the fruits and vegetables during slicing, thereby achieving better preservation and sterilization effects, helping to maintain the quality of fruits and vegetables for a long time, extending the shelf life of fresh fruits and vegetables, and reducing the loss rate of fresh fruits and vegetables during sales and transportation. Cleaning, slicing, and preservation and sterilization are completed at one time, and the processed fruit and vegetable pieces have the advantages of no washing or cutting required and long shelf life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall framework of the system of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the cold plasma slicing chamber in the system of the present invention;

[0019] Figure 3 This is a schematic structural diagram of the cold plasma slicing knife group in the system of the present invention;

[0020] Figure 4 This is a driving principle diagram of the cold plasma slicing knife group in the system of the present invention;

[0021] Figure 5It is a structural schematic diagram of the cold plasma cyclone cleaner in the system of the present invention.

[0022] In the figure: 1-slicing box, 2-air outlet, 3-cold plasma slicing knife group, 4-monitoring device, 5-power box, 6-feeding port, 7-induction lifting door, 8-discharging port, 9-conveyor belt, 10-air inlet, 11-AC high-voltage power supply, 12-ground electrode, 13-dielectric, 14-blade, 15-plate electrode, 16-Scotch yoke connecting rod mechanism, 17-circulating pump, 18-heating jacket, 19-housing, 20-air duct, 21-three-way water distribution pipe, 22-water inlet pipe section, 23-cover plate. DETAILED DESCRIPTION

[0023] The technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, a cold plasma fruit and vegetable preservation and sterilization system includes a cold plasma slicing chamber, a cold plasma cyclone cleaner, a conveyor belt 9, and a gas tank assembly. The conveyor belt 9 passes under the cold plasma cyclone cleaner and then through the cold plasma slicing chamber, transporting fruits and vegetables cleaned by the cold plasma cyclone cleaner to the interior of the cold plasma slicing chamber.

[0025] Combine Figure 2 As shown, the cold plasma slicing chamber includes a slicing box 1 and a cold plasma slicing blade assembly 3. The slicing box 1 has a feed port 6 and a discharge port 8, respectively, for a conveyor belt 9 to pass through. These ports are used to allow cleaned fruits and vegetables to enter and sliced fruits and vegetables to exit. Sensor-activated lift gates 7 are installed at the feed port 6 and discharge port 8, respectively. These lift and lower the fruits and vegetables only during entry and exit, and seal the feed port 6 and discharge port 8 while the fruits and vegetables are being sliced within the slicing box 1. To further ensure airtightness and prevent excessive air leakage from the gas cylinder assembly, sealing strips are bonded to the bottom and sides of the sensor-activated lift gate 7, sealing the gap between the sensor-activated lift gate 7 and the feed port 6 and discharge port 8. The cold plasma slicing blade assembly 3 is mounted at the top of the slicing box 1 and driven by a reciprocating mechanism. The cold plasma slicing blade assembly 3 consists of multiple slicing blades arranged in pairs along the front-to-back direction to slice the fruits and vegetables delivered to the slicing box 1 by the conveyor belt 9.

[0026] Combine Figure 3As shown, the slicing knife includes a cold plasma emission device and a blade 14. The cold plasma emission device utilizes a dielectric barrier discharge reactor and is powered by an AC high-voltage power supply 11 with a voltage range of 5.5-80 kV. The dielectric barrier discharge reactor comprises a ground electrode 12, a dielectric 13, and a flat electrode 15. The dielectric 13 is clamped and fixed on both sides of the flat electrode 15. Two glass plates can be used as the dielectric 13. The blade 14 is fixedly mounted at the bottom of the dielectric 13, separated from the flat electrode 15. A notch can be machined in the bottom of the dielectric 13 to insert the blade 14, facilitating replacement of the blade 14 as needed. The two poles of the AC high-voltage power supply 11 are connected to the flat electrodes 15 of the two paired slicing knives and to the ground electrode 12 via wires. The waveforms generated by the two adjacent AC high-voltage power supplies 11 in the cold plasma slicing knife set 3 alternate, creating a potential difference between the flat electrodes 15 of the two paired slicing knives, generating a microcurrent to treat both sides of the cut surface of the fruit or vegetable.

[0027] Combine Figure 4 As shown, the mechanism for driving and controlling the up and down reciprocating movement of the cold plasma slicing knife group 3 can adopt a Scotch yoke connecting rod mechanism 16. Specifically, a driving motor is used as a power source, and the output shaft of the driving motor is connected to a shaft. A plurality of discs are coaxially fixed on the shaft and are arranged one-to-one with the slicing knives. An eccentric shaft is provided on the edge of the disc, and a T-shaped connecting rod is fixed on the upper end of the slicing knife. The transverse support arm of the T-shaped connecting rod is processed with a slide groove, and the eccentric shaft is inserted into the slide groove. In addition, the inner wall of the slicing box 1 is provided with a vertical slideway for limiting the two sides of the slicing knife. Therefore, when the driving motor controls the rotation of the shaft, the disc rotates accordingly and drives the slicing knife to move back and forth between the corresponding vertical slideways through the eccentric shaft and the T-shaped connecting rod, thereby realizing the slicing operation of fruits and vegetables.

[0028] Combine Figures 1 and 2 As shown, an air outlet 2 and an air inlet 10 are respectively provided at the top and bottom of the slicing box 1. The gas tank group is connected to the mixing chamber through a pipeline, and then the gas is supplied to the slicing box 1 through the air inlet 10. The gas tank group is composed of multiple gas tanks according to demand, each gas tank is equipped with an opening regulating valve, and all the gas tanks are connected to the air inlet end of the mixing chamber through pipelines. The gas tanks are filled with different gases according to demand. The required gases are mixed in proportion inside the mixing chamber according to demand by adjusting the opening regulating valve. The air outlet end of the mixing chamber is connected to the air inlet 10 through a pipeline, and the mixed gas is supplied to the slicing box 1.

[0029] In addition, a monitoring device 4 can be integrated on the slicing box 1 to monitor the entire cold plasma treatment process. The monitoring device 4 displays the internal image of the slicing box 1 in real time through the monitor, and monitors the discharge parameters of the cold plasma through the arrangement of sensors. The discharge parameters include current, charge, discharge voltage, etc. If there is any abnormality, the operator can be alerted by a buzzer sounded by the matching automatic alarm.

[0030] In addition, in order to avoid the disadvantage that the cut surface of fruits and vegetables cannot completely contact the cold plasma emission device due to the presence of the blade 14 after the blade 14 contacts the surface of the conveyor belt 9 during the slicing process, which leads to the disadvantage that the cold plasma effect is not comprehensive, it is advisable to use a servo-controlled chain plate conveyor belt for the conveyor belt 9, and the center position of each chain plate unit is processed with a groove for burying the blade 14. During the period when the conveyor belt 9 stops moving, all the blades 14 of the cold plasma slicing knife group 3 are arranged vertically opposite to the grooves of the corresponding chain plate units. Through such a design, the blade 14 can be buried in the corresponding groove during the falling process of the slicing knife, so that the cut surface of fruits and vegetables can be completely in contact with the dielectric 13.

[0031] Combine Figure 5 As shown, the cold plasma cyclone cleaner includes a circulation pump 17, a housing 19, a water inlet pipe section 22 and a cover plate 23. The housing 19 includes an upper cylindrical section and a lower conical section. The cover plate 23 is installed on the top of the upper cylindrical section. A cold plasma activated water generator is installed on the inner wall of the lower conical section for ionizing and activating the liquid in the housing 19 to generate plasma activated water. The bottom end of the lower conical section is provided with a discharge port with an on-off valve. The water inlet end of the circulation pump 17 is laterally connected to the bottom end of the lower conical section through a return pipe. Since different fruits and vegetables have different temperature requirements for the cleaning liquid, a heating jacket 18 can be attached to the outside of the return pipe to control the temperature of the cleaning liquid. The lower end of the water inlet pipe section 22 is connected to the water outlet end of the circulation pump 17, and the upper end of the water inlet pipe section 22 is tangentially connected to the upper cylindrical section. After the fruits and vegetables are cleaned and discharged from the bottom end of the lower conical section, they can be dried. For example, a wind tube 20 is provided at the bottom of the discharge port with an on-off valve of the housing 19, and the wind tube 20 is connected to an external drying device for air supply, so that the falling fruits and vegetables are dried by the air flow.

[0032] In addition, a three-way water distribution pipe 21 can be set in the return pipe of the cold plasma cyclone cleaner. The three-way water distribution pipe 21 is provided with a solenoid valve and connected to the waste liquid tank. After the cold plasma cyclone cleaner finishes cleaning the fruits and vegetables, the waste liquid is discharged to the waste liquid tank for storage by opening the solenoid valve of the three-way water distribution pipe 21.

[0033] In order to improve the degree of automation of this application, a power box 5 can be configured for the entire system to supply power to the electrical components of the monitoring device 4, conveyor belt 9, cold plasma slicing chamber and cold plasma cyclone cleaner.

[0034] In this application, the gas in the gas cylinder assembly can be selected based on demand, including air, argon, helium, oxygen, nitrogen, and other gases. The ratio of these gases can be adjusted based on actual needs using a regulating valve. Different gas sources influence the plasma's discharge characteristics, emission spectra, and chemical properties, resulting in the production of different types and concentrations of active substances. This, in turn, determines the effectiveness of food sterilization, preservation, and pesticide and toxin degradation, ultimately impacting the shelf life of fruits and vegetables.

[0035] The principle of a cold plasma emission device is that under the influence of a high-voltage electric field, the gas near the electrode is ionized, generating electrons. These electrons gain energy from the electric field and, through collisions with surrounding molecular atoms, transfer energy, causing them to ionize and generate an electron avalanche. Because the dielectric barrier limits the unlimited growth of the discharge current, the gas does not completely break down to form sparks or arcs, but instead forms current filaments that are randomly distributed in space and time. The ionization of the gas in the discharge gap can produce a variety of active species, such as reactive oxygen species, reactive nitrogen species, ultraviolet photons, and charged particles.

[0036] During use, fruits and vegetables to be treated and liquid (such as deionized water, phosphate buffer solution, 0.9% sodium chloride solution, etc.) are placed into the shell 19 of the cold plasma vortex cleaner through the cover plate 23. The activation time is set according to different needs. The cold plasma activated water generator therein starts to operate. After the activation time, the circulating pump 17 starts to work, so that the liquid is sucked from the bottom of the shell 19 to the top and ejected from the water inlet pipe section 22. Under the action of centrifugal force, the activated water inside the shell 19 produces a centrifugal phenomenon and a vortex, achieving the purpose of cleaning the surface of fruits and vegetables. After the cleaning is completed, the circulating pump 17 stops working, and the electromagnetic valve of the three-way water distribution pipe 21 is opened to discharge the waste liquid into the waste liquid tank for storage. The on-off valve of the discharge port at the bottom of the shell 19 is opened. The fruits and vegetables are dried in the air duct 20 during the falling process, and then fall on the conveyor belt 9 and are delivered to the interior of the cold plasma slicing chamber.

[0037] When the fruits and vegetables enter the cold plasma slicing chamber through the conveyor belt 9 and are located below the cold plasma slicing knife group 3, the conveyor belt 9 stops running, the induction lifting door 7 of the feed port 6 and the discharge port 8 is closed, and the gas mixed in the mixing chamber by the gas tank group is sent into the cold plasma slicing chamber from the gas inlet 10 according to demand. After the gas is full, the up and down reset movement mechanism is started to control the cold plasma slicing knife group 3 to move downward to slice the fruits and vegetables. During this period, the cut surface of the fruits and vegetables contacts the cold plasma emission device, and the cold plasma generated by the cold plasma emission device processes the cut surface of the fruits and vegetables. After the treatment is completed, the cold plasma slicing knife group 3 moves up, and the conveyor belt 9 continues to run to send out the processed fruit and vegetable pieces.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other configurations without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations coming within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0039] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A cold plasma fruit and vegetable preservation and sterilization system, characterized by: The invention comprises a cold plasma slicing chamber, a cold plasma cyclone cleaner, a conveyor belt (9) and a gas tank group. The conveyor belt (9) passes through the cold plasma slicing chamber after passing through the bottom of the cold plasma cyclone cleaner. The cold plasma slicing chamber comprises a slicing box (1) and a cold plasma slicing knife group (3). The front and rear side walls of the slicing box (1) are respectively provided with a feed port (6) and a discharge port (8) for the conveyor belt (9) to pass through. The feed port (6) and the discharge port (8) are respectively provided with an induction lifting door (7). The cold plasma slicing knife group (3) is installed at the top of the slicing box (1) and is driven and controlled by an up and down reciprocating displacement mechanism. The plasma slicing knife group (3) is composed of a plurality of slicing knives arranged in parallel in a front-to-back direction and arranged in pairs. The slicing knives include a cold plasma emission device and a blade (14) installed at the bottom thereof. The cold plasma emission device adopts a dielectric barrier discharge reactor and is powered by an AC high-voltage power supply (11) with a voltage value ranging from 5.5 to 80 kV. The dielectric barrier discharge reactor comprises three parts: a ground electrode (12), a dielectric (13) and a flat electrode (15). The dielectric (13) is clamped and fixed on both sides of the flat electrode (15). The blade (14) is fixedly installed at the bottom of the dielectric (13) and is connected to the flat electrode. The electrodes (15) are spaced apart, and the dielectric (13) is fixed on both sides of the flat electrode (15) by two glass plates. The two poles of the AC high-voltage power supply (11) are respectively connected to the flat electrodes (15) in the two slicing knives arranged in pairs through wires and are simultaneously connected to the ground electrode (12). The waveforms generated by the two adjacent AC high-voltage power supplies (11) in the cold plasma slicing knife group (3) are alternately transformed. During the falling process of the slicing knife, the cut surface of the fruit and vegetable is completely in contact with the dielectric (13). The top and bottom of the slicing box (1) are respectively provided with an air outlet (2) and an air inlet (10). The gas tank group is connected to the mixing chamber through a pipeline and then the air inlet is supplied by the gas inlet. The opening (10) supplies air into the slicing box (1). The cold plasma cyclone cleaner comprises a circulation pump (17), a shell (19), a water inlet pipe section (22) and a cover plate (23). The shell (19) comprises an upper cylindrical section and a lower conical section. The cover plate (23) is mounted on the top of the upper cylindrical section. A cold plasma activated water generator is installed on the inner wall of the lower conical section. The bottom end of the lower conical section is provided with a discharge port with an on-off valve. The water inlet end of the circulation pump (17) is laterally connected to the bottom end of the lower conical section through a return pipe. The lower end of the water inlet pipe section (22) is connected to the water outlet end of the circulation pump (17). The upper end of the water inlet pipe section (22) is tangentially connected to the upper cylindrical section.

2. The cold plasma fruit and vegetable preservation and sterilization system according to claim 1, characterized in that: The slicing box (1) is integrated with a monitoring device (4), which displays the internal image of the slicing box (1) in real time through a monitor and monitors the discharge parameters of the cold plasma through the arrangement of sensors.

3. A cold plasma fruit and vegetable preservation and sterilization system according to claim 1 or 2, characterized in that: The return water pipe of the cold plasma cyclone cleaner is provided with a three-way water distribution pipe (21), and the three-way water distribution pipe (21) is provided with a solenoid valve and connected to a waste liquid tank.

4. The cold plasma fruit and vegetable preservation and sterilization system according to claim 1, characterized in that: A heating jacket (18) is provided on the outside of the return pipe of the cold plasma cyclone cleaner.

5. The cold plasma fruit and vegetable preservation and sterilization system according to claim 1, characterized in that: The bottom of the discharge port with the on-off valve of the shell (19) is connected to a wind tube (20), and the wind tube (20) is connected to an external air drying device.

6. The cold plasma fruit and vegetable preservation and sterilization system according to claim 1, characterized in that: The conveyor belt (9) is a servo-controlled chain plate type conveyor belt, and a groove for embedding a blade (14) is processed at the center position of each chain plate unit. When the conveyor belt (9) stops moving, all blades (14) of the cold plasma slicing knife group (3) are arranged vertically opposite to the grooves of the corresponding chain plate units.

7. The cold plasma fruit and vegetable preservation and sterilization system according to claim 1, characterized in that: Sealing strips are fixedly provided at the bottom and both sides of the induction lifting door (7).

8. The cold plasma fruit and vegetable preservation and sterilization system according to claim 1, characterized in that: The up and down reciprocating displacement mechanism uses a driving motor as a power source and controls the up and down reciprocating movement of the slicing knife of the cold plasma slicing knife group (3) through a Scotch yoke connecting rod mechanism (16).

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