CN116671648A - Plasma activated water sterilization system and method - Google Patents

Abstract

The invention provides a plasma activated water sterilization system and a method, wherein the system comprises the following steps: the plasma cleaning device comprises a gas drainage device, a plasma generating device, a water tank and a cleaning device, wherein the gas drainage device, the plasma generating device, the water tank and the cleaning device are sequentially communicated, the plasma generating device is used for ionizing air into plasma, the gas drainage device is used for sucking air and blowing the plasma into the water tank, the water tank is used for introducing the plasma to enable the plasma to react with water to generate plasma activated water, the plasma activated water is conveyed to the cleaning device, and the cleaning device is used for cleaning objects by adopting the plasma activated water. The sterilizing agent is used for solving the defect that the traditional sterilizing mode in the prior art has problems, effectively killing pathogenic bacteria and harmful microorganisms carried by foods such as fruits and vegetables or other articles, and does not bring serious loss to the sense and nutrition quality of the fruits and vegetables.

Description

Plasma activated water sterilization system and method

technical field

The invention relates to the technical field of fruit and vegetable preservation, in particular to a plasma-activated water sterilization system and method.

Background technique

With people's longing for a healthy lifestyle in recent years, consumers are more willing to choose healthy and green high-quality fruits and vegetables in terms of diet. In order to improve the safety and reliability of fruits and vegetables, fruits and vegetables will be cleaned before entering the market. Preservation is a very important step in the process of cleaning vegetables. Good fresh-keeping technology can prolong the shelf life of fruits and vegetables and reduce the loss of sensory and nutritional quality of fruits and vegetables .

In recent years, the food industry has also been looking for a new technology that can improve product safety, extend shelf life and effectively maintain food quality. Heat treatment is a commonly used and relatively economical technique, but it may destroy the flavor, color, texture and nutritional content of heat-sensitive foods. In recent years, non-thermal technology has been more and more widely used in the food industry because of its low processing temperature and can avoid the damage caused by heat treatment technology to products. At present, the common non-thermal sterilization technologies mainly include chemical reagent sterilization, ultraviolet sterilization, ozone sterilization, and ultra-high pressure sterilization technology. These sterilization techniques have their own advantages and disadvantages. The above traditional sterilization techniques all have various problems, which will have a certain impact on the sensory and nutritional quality of food. Therefore, in recent years, people have been working hard to find a greener and more efficient sterilization technique. Low-temperature plasma technology is a safe and green fresh-keeping technology developed in recent years. Low-temperature plasmas are usually generated from air or inert gases under vacuum or atmospheric pressure. Different from ordinary neutral gases, it contains a large number of charged particles, which is affected by external electric and magnetic fields, and has unique physical properties such as light, electricity, and heat. Its production process is accompanied by a variety of physical and chemical reactions. Low-temperature plasma technology is to inhibit the growth and reproduction of spoilage bacteria and harmful microorganisms on the surface of food through the synergistic effect of high-energy electron radiation, ultraviolet photolysis, ozone oxidation, and active substances. Compared with the traditional sterilization technology, the main advantage lies in its high working efficiency, green and pollution-free, simple and convenient operation, which can effectively kill pathogenic bacteria and harmful microorganisms on food, and will not affect the sensory and nutritional quality of food. Serious losses, the current application in the food industry has become more and more extensive.

Therefore, how to sterilize and preserve food such as fruits and vegetables through plasma technology has become an urgent technical problem to be solved.

Contents of the invention

The invention provides a plasma-activated water sterilization system, which is used to solve the problems and defects of the traditional sterilization methods in the prior art, and realize the effective killing of pathogenic bacteria and harmful microorganisms carried by foods such as fruits and vegetables or other items without harming Severe loss of sensory and nutritional quality of fruits and vegetables.

The invention provides a plasma-activated water sterilization system, comprising: a gas drainage device, a plasma generating device, a water tank and a cleaning device connected in sequence, the plasma generating device is used to ionize air into plasma, and the gas drainage device The device is used to suck air and blow the plasma into the water tank, and the water tank is used to introduce the plasma to react with water to generate plasma-activated water, and deliver the plasma-activated water to the cleaning device, and the cleaning device is used to adopt Plasma-activated water cleans items.

According to a plasma-activated water sterilization system provided by the present invention, the plasma generating device includes a high-voltage electrode unit and a low-voltage electrode unit, and the high-voltage electrode unit includes a uniformly bonded high-voltage electrode and a first dielectric layer. The electrode unit includes a uniformly attached low-voltage electrode and a second dielectric layer, and the first dielectric layer and the second dielectric layer are parallel to each other.

According to a plasma-activated water sterilization system provided by the present invention, the distance between the first medium layer and the second medium layer is 5-10 mm.

According to a plasma-activated water sterilization system provided by the present invention, the water tank is provided with a water tank inlet, a water tank outlet, and a water tank inlet, the water tank inlet is connected with a plasma generating device, and the water tank outlet In communication with the cleaning device, the water tank is provided with a first water pump, the first water pump introduces an external water source into the water tank through the water inlet of the water tank, and delivers the plasma-activated water to the cleaning device through the water outlet of the water tank.

According to a plasma activated water sterilization system provided by the present invention, the cleaning device includes: a box body, a water leakage tray, a spray unit and a second water pump, the box body is provided with a cleaning water inlet and a cleaning water outlet, and the cleaning The water inlet is communicated with the water tank, the leaking tray is set in the box, the spray unit includes a column and an upper spray head, the column is hollow, and a water hole is provided at the bottom of the column, the column is arranged in the box, the The upper nozzle communicates with the column and is arranged above the leaky tray. The upper nozzle faces the leaky tray. The second water pump is used to draw plasma-activated water to the column through the water hole and spray it out through the upper nozzle.

According to a plasma-activated water sterilization system provided by the present invention, the spray unit further includes a lower spray head, the lower spray head communicates with the column, and is arranged below the leaking tray, and the lower spray head faces the leaking tray.

According to a plasma-activated water sterilization system provided by the present invention, the spray unit further includes a rotating motor for driving the column to rotate around the axis.

According to a plasma-activated water sterilization system provided by the present invention, a water level sensor is provided in the box, a pressure sensor is provided in the leaking tray, and the cleaning device also includes a control unit, which is used to Calculate the amount of plasma activated water and the preset cleaning time based on the data of the pressure sensor, control the opening and closing of the cleaning water inlet according to the data of the plasma activated water and the water level sensor, and control the running time of the second water pump and the rotating motor according to the preset cleaning time.

According to a plasma-activated water sterilization system provided by the present invention, the plasma generator and the water tank are communicated through a gas distribution device, and the gas distribution device includes an air inlet pipe, an air box and an air outlet pipe connected in sequence, and the The air inlet pipe communicates with the plasma generating device through a rubber pipe, and the air outlet pipes are several, and are respectively connected to the water tank through rubber pipes. Both the air inlet pipe and the air outlet pipe are provided with anti-skid parts, and the inside of the air box is hollow.

The present invention also provides a plasma-activated water sterilization method, which is applied to any of the plasma-activated water sterilization systems described above, including:

Put the fruits and vegetables to be sterilized into the cleaning device, and cut off the communication between the water tank and the cleaning device;

Calculate the amount of plasma activated water and preset cleaning time according to the type and quality of fruits and vegetables;

Start the gas drainage device and the plasma generating device, and introduce an external water source into the water tank;

After the plasma reaction in the water tank reaches the preset reaction time, the communication between the water tank and the cleaning device is restored, and after the plasma activated water enters the cleaning device to reach the amount of plasma activated water, the communication between the water tank and the cleaning device is cut off;

Start the cleaning device and turn off the cleaning device after the preset cleaning time.

A plasma-activated water sterilization system provided by the present invention is provided with a gas drainage device, a plasma generation device, a water tank and a cleaning device connected in sequence, and the gas drainage device sucks external air into the plasma generation device to ionize it into plasma , and blow the ionized plasma into the water tank. After the plasma is introduced into the water tank, it reacts with the introduced external water source to generate plasma-activated water, and the generated plasma-activated water is delivered to the cleaning device. Finally, the cleaning device uses the plasma-activated water to clean the articles to achieve the effect of sterilization and preservation. Through the system of the present invention, the plasma can be directly ionized from the air, and it can be fully reacted in water to generate plasma activated water, and the plasma activated water is used to clean the articles. In addition to the conventional cleaning function, it also fully utilizes the The excellent sterilizing function of plasma can sterilize fruits and vegetables and other items, so that the washed fruits and vegetables can also have a long-term freshness preservation effect. It effectively kills pathogenic bacteria and harmful microorganisms on fruits and vegetables without causing serious loss to the sensory and nutritional quality of fruits and vegetables, and overcomes the problems existing in traditional sterilization methods. The invention is suitable for the sterilization treatment of fruits and vegetables by means of plasma activated water cleaning.

Description of drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description are the present invention. For some embodiments of the invention, those skilled in the art can also obtain other drawings based on these drawings without creative effort.

Fig. 1 is the structural representation of the gas drainage device, the plasma generating device and the gas splitting device of the plasma activated water sterilization system provided by the present invention;

Fig. 2 is the sectional structure diagram of the plasma generating device of the plasma activated water sterilization system provided by the present invention;

Fig. 3 is the structural representation of the water tank of the plasma activated water sterilization system provided by the present invention;

Fig. 4 is the schematic structural view of the cleaning device of the plasma activated water sterilization system provided by the present invention;

Fig. 5 is the schematic flow chart of the cleaning method of the plasma activated water sterilization system provided by the present invention;

Fig. 6 is the bactericidal effect of different discharge times when applying the present invention to clean broccoli;

Fig. 7 is the bactericidal effect of different cleaning time when applying the present invention to clean broccoli;

Fig. 8 shows the bactericidal effect corresponding to different quality broccoli when the present invention is applied to clean the broccoli.

Reference signs: gas drainage device 1, plasma generator 2, high-voltage electrode 21, low-voltage electrode 22, first medium layer 23, second medium layer 24, gas distribution device 3, air inlet pipe 31, gas box 32, air outlet pipe 33, water tank 4, water tank air inlet 41, water tank water outlet 42, water tank water inlet 43, cleaning device 5, box body 51, cleaning water inlet 52, cleaning water outlet 53, leaking tray 54, column 55, upper nozzle 56, Lower nozzle 57.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The first embodiment of the present invention will be described below with reference to FIGS. 1-4 .

The plasma-activated water sterilization system according to the first embodiment of the present invention includes: a gas drainage device 1, a plasma generating device 2, a water tank 4 and a cleaning device 5 connected in sequence, and the plasma generating device 2 is used to ionize air For plasma, the gas drainage device 1 is used to inhale air and blow the plasma into the water tank 4, and the water tank 4 is used to introduce the plasma to react with water to generate plasma-activated water, and deliver the plasma-activated water To the cleaning device 5, the cleaning device 5 is used to clean the articles with plasma-activated water.

As shown in FIGS. 1-4 , the plasma-activated water sterilization system according to the first embodiment of the present invention includes a gas drainage device 1 , a plasma generation device 2 , a gas distribution device 3 , a water tank 4 and a cleaning device 5 connected in sequence.

The gas guiding device 1 is a fan or an air pump, which is used to suck air into the plasma generator 2 and blow out the plasma generated by the plasma generator 2 .

The plasma generating device 2 is used to change the external power supply into a high-voltage alternating current that can penetrate the air, so as to ionize the inhaled air into plasma.

The plasma generator 2 and the water tank 4 are communicated through a gas distribution device 3 , and the gas distribution device 3 is used to connect the plasma generator 2 and the water tank 4 to provide a stable flow channel for the plasma.

The water tank 4 is used to provide a reaction place for the plasma and water to react with water to generate plasma-activated water, and deliver the plasma-activated water to the cleaning device 5 .

The cleaning device 5 is used to clean the articles with plasma-activated water, so as to realize the effect of sterilization and preservation.

A plasma-activated water sterilization system provided by the present invention is provided with a gas drainage device 1, a plasma generation device 2, a water tank 4 and a cleaning device 5 connected in sequence, and the gas drainage device 1 sucks external air into the plasma generation device 2 It is ionized into plasma, and the ionized plasma is blown into the water tank 4 . After introducing the plasma, the water tank 4 reacts with the introduced external water source to generate plasma-activated water, and transports the generated plasma-activated water to the cleaning device 5 . Finally, the cleaning device 5 uses the plasma-activated water to clean the articles to achieve the effect of sterilization and preservation. Through the system of the present invention, the plasma can be directly ionized from the air, and it can be fully reacted in water to generate plasma activated water, and the plasma activated water is used to clean the articles. In addition to the conventional cleaning function, it also fully utilizes the The excellent sterilizing function of plasma can sterilize fruits and vegetables and other items, so that the washed fruits and vegetables can also have a long-term freshness preservation effect. It effectively kills pathogenic bacteria and harmful microorganisms on fruits and vegetables without causing serious loss to the sensory and nutritional quality of fruits and vegetables, and overcomes the problems existing in traditional sterilization methods. The invention is suitable for the sterilization treatment of fruits and vegetables by means of plasma activated water cleaning.

In this embodiment, the plasma generator 2 includes a high-voltage electrode 21 unit and a low-voltage electrode 22 unit. The high-voltage electrode 21 unit includes a uniformly bonded high-voltage electrode 21 and a first dielectric layer 23. The low-voltage electrode 22 unit It includes a uniformly attached low-voltage electrode 22 and a second dielectric layer 24, and the first dielectric layer 23 and the second dielectric layer 24 are parallel to each other.

As shown in Figure 2, the interior of the plasma generator 2 includes a high-voltage electrode 21 unit and a low-voltage electrode 22 unit. The upper and lower surfaces are closely and evenly bonded. In order to prevent electric shock between the two electrode plates, the size of the dielectric layer is slightly larger than that of the electrode plates. Therefore, the dimensions of the first dielectric layer 23 and the second dielectric layer 24 are set to be 120 mm in length, 30 mm in width, and 3 mm in height. The dimensions of the high-voltage electrode 21 and the low-voltage motor are 100 mm in length, 30 mm in width, and 2 mm in height.

Air is used as the discharge medium, and the electrodes and the dielectric layer are wrapped with cylinder air passages, the first dielectric layer 23 and the second dielectric layer 24 are parallel to each other, and the surface of the motor is kept flat to ensure uniform dielectric barrier discharge between the two electrodes. No spark discharge occurs locally. The plasma sending device boosts the low-voltage DC power supply to high-voltage AC power through the connected power module, and discharges it through the bipolar plates. At the same time, the power module has a built-in feedback circuit to ensure that the discharge circuit does not burn out due to excessive current.

In this embodiment, the distance between the first dielectric layer 23 and the second dielectric layer 24 is 5-10 mm.

The smaller the discharge gap, the higher the electric field strength, but if the discharge gap is too small, the gas flow rate will be reduced and the work efficiency will be affected. In this embodiment, the discharge gap is set, that is, the distance between the first dielectric layer 23 and the second dielectric layer 24 is within the range of 5-10 mm, which can ensure the electric field strength and work efficiency at the same time. In order to ensure the ionization effect, the material of the dielectric layer is made of plastic with better insulation, preferably polytetrafluoroethylene, and the electrode material is made of copper and aluminum with good conductivity.

In this embodiment, the water tank 4 is provided with a water tank inlet 41, a water tank outlet 42 and a water tank inlet 43, the water tank inlet 41 communicates with the plasma generator 2, and the water tank outlet 42 communicates with the cleaning The device 5 is connected, and the water tank 4 is provided with a first water pump. The first water pump introduces an external water source into the water tank 4 through the water tank water inlet 43 , and delivers the plasma-activated water to the cleaning device 5 through the water tank water outlet 42 .

As shown in FIG. 3 , the water tank 4 is a hollow cuboid, and the air inlet 41 of the water tank communicates with the outlet of the plasma generator 2 for introducing plasma. The water inlet is located at the top of the water tank 4 for introducing an external water source. The water outlet 42 of the water tank communicates with the cleaning device 5 and is used for inputting plasma-activated water into the cleaning device 5 . The built-in first water pump introduces the external water source into the water tank 4 through the water tank water inlet 43 , and after the reaction is sufficient, the plasma activated water is delivered to the cleaning device 5 through the water tank water outlet 42 .

In this embodiment, the plasma generator 2 and the water tank 4 are communicated through a gas distribution device 3, and the gas distribution device 3 includes an inlet pipe 31, a gas tank 32 and an outlet pipe 33 connected in sequence, and the inlet pipe 31 communicates with the plasma generator 2 through rubber tubes, and the gas outlet pipes 33 are several, and are respectively connected to the water tank 4 through rubber tubes. The box 32 is hollow inside.

Inlet pipe 31 is communicated with the outlet of plasma generator 2 by rubber tube, and air outlet pipe 33 is several (the present embodiment is 4), and is communicated with water tank 4 by rubber pipe respectively, promptly each air outlet pipe 33 can connect a The water tank 4 can realize simultaneous processing of multiple groups of samples and improve work efficiency. Both the air inlet pipe 31 and the air outlet pipe 33 are provided with anti-slip parts, which can effectively prevent the rubber pipes from falling off and ensure the airtightness of the joints. The air box 32 is a hollow cylinder inside, which can provide a buffer for a large amount of plasma coming out of the inlet pipe 31 , so that it can evenly enter the water tank 4 through the outlet pipe 33 .

In this embodiment, the cleaning device 5 includes: a box body 51, a water leakage tray 54, a spray unit and a second water pump, the box body 51 is provided with a cleaning water inlet 52 and a cleaning water outlet 53, and the cleaning water inlet 52 Connected with the water tank 4, the leaking tray 54 is arranged in the box body 51, the spraying unit includes a column 55 and an upper nozzle 56, the column 55 is hollow, and the bottom of the column 55 is provided with a water hole, the column 55 Set in the box body 51, the upper nozzle 56 communicates with the column 55 and is arranged above the leaking tray 54, the upper nozzle 56 faces the leaking tray 54, and the second water pump is used to pass the plasma activated water through the water The holes are pumped into the column 55 and sprayed out through the upper spray head 56 .

As shown in Figure 4, the casing 51 of the cleaning device 5 is a hollow cube, and the leakage tray 54 is fixed on the middle and upper position in the casing 51 for holding foods such as fruits and vegetables, and the leakage tray 54 is provided with some leakage holes for drainage. The column 55 of the spraying unit is a hollow cylinder, and the bottom thereof is provided with a plurality of water holes, and the water in the box body 51 can enter the interior of the column 55 through the water holes. The column 55 is fixed at the middle position in the box body 51, the upper nozzle 56 communicates with the top of the column 55, and is arranged above the leakage tray 54, the upper nozzle 56 faces the leakage tray 54, and the lower nozzle 57 communicates with the column 55, and is arranged on the leakage tray 54 Below, the lower spray head 5756 faces the leaking tray 54 equally. The second water pump is used to draw the plasma-activated water to the column 55 through the water hole, and spray it out through the upper nozzle 56, and the rotating motor is used to drive the column 55 to rotate around the axis. In the present embodiment, the second water pump and the rotating motor are all arranged on the top of the casing 51, the second water pump communicates with the column 55 through the water pipe, and the rotating motor drives the column 55 to rotate through the belt, and the above design can ensure that the column 55 rotates, Efficient operation of the second water pump.

When the cleaning device 5 is working, the second water pump pumps the plasma-activated water at the bottom of the column 55 to the top of the column 55, and sprays it on the fruits and vegetables through the nozzle to clean and sterilize. Extracted to the top of column 55, the article is cleaned again. Through the above structure, the plasma-activated water can be recycled to repeatedly clean and sterilize fruits and vegetables, effectively improving the utilization rate of the plasma-activated water and ensuring the effect of cleaning and sterilizing.

In this embodiment, the spraying unit further includes a lower spray head 57 , which communicates with the column 55 and is arranged below the leaking tray 54 , and the lower spray head 57 faces the leaking tray 54 .

The fruits and vegetables in the leaking tray 54 are flushed up and down simultaneously by the upper nozzle 56 and the lower nozzle 57, which further improves the cleaning effect.

In this embodiment, the spraying unit further includes a rotating motor for driving the column 55 to rotate around the axis.

The rotating motor drives the column 55 to rotate around the axis, so that the upper spray head 56 and the lower spray head 57 rotate synchronously during the water spraying process, providing an all-round spraying effect for fruits and vegetables without dead ends.

In this embodiment, a water level sensor is provided in the box body 51, a pressure sensor is provided in the leaking tray 54, and the cleaning device 5 also includes a control unit for calculating the plasma level according to the received fruit and vegetable type data and the pressure sensor data. According to the amount of plasma activated water and the preset cleaning time, the opening and closing of the cleaning water inlet 52 is controlled according to the amount of plasma activated water and the data of the water level sensor, and the running time of the second water pump and the rotating motor is controlled according to the preset cleaning time.

Through the intelligent control unit, the parameters of the fruits and vegetables in the cleaning device 5 are automatically set and cleaned, which can further ensure the cleaning and sterilization effect compared with manual control. First, the staff presets the types of fruits and vegetables that need to be sterilized, such as broccoli. The control unit specifies the ratio of plasma-activated water to broccoli according to the preset database to wash 100 grams of broccoli per 1 liter of water, and the preset cleaning time is 20 minute. After the broccoli is put into the leakage tray 54, the pressure sensor measures that the mass of the broccoli is 100 grams, and 1 liter of plasma-activated water is needed. After the water level detector detects that the plasma-activated water entering the cleaning water inlet 52 reaches 1 liter, the cleaning water inlet 52 is closed, and the second water pump and the rotating motor are controlled to run for 20 minutes. Through the above methods, the amount of cleaning water and cleaning time can be more accurately controlled, and energy and water can be saved on the premise of ensuring cleaning and sterilization.

The plasma-activated water sterilization method provided in the second embodiment of the present invention is described below, and the plasma-activated water sterilization method described below and the plasma-activated water sterilization system described above can be referred to in correspondence.

As shown in Figure 5, a kind of plasma-activated water sterilization method of the present embodiment is applied to the above-mentioned plasma-activated water sterilization system, and specifically includes the following steps (the numbering of each step in the present invention is only used to distinguish steps, and is not limited The specific execution order of each step):

Step S1: Put the fruits and vegetables to be sterilized into the cleaning device 5, and cut off the communication between the water tank 4 and the cleaning device 5.

Place the fruits and vegetables to be sterilized in the leaking tray 54 of the cleaning device 5, close the cleaning water inlet 52 and the cleaning water outlet 53, and cut off the communication between the water tank 4 and the cleaning device 5. Open the water tank air inlet 41, the water tank water outlet 42 and the water tank water inlet 43, and keep the communication between the plasma generator 2, the gas distribution device 3 and the water tank 4.

Step S2: Calculate the amount of plasma-activated water and preset cleaning time according to the type and quality of fruits and vegetables.

Taking the sterilization of broccoli as an example, the present invention has done a lot of experiments through the system of the present invention in order to clarify the best discharge time, cleaning time and water ratio of fruits and vegetables under different types and qualities.

As shown in Figure 6, for the bactericidal effect of different discharge times when cleaning broccoli, each curve is the colony of broccoli in the refrigerator after the same quality of broccoli is cleaned and sterilized by plasma-activated water with different reaction times in the water tank 4. (CK is the blank control group), it can be seen that after the plasma and water react in the water tank 4 for 10 minutes, the generated plasma activated water can better take into account the effects of sterilization and energy saving, that is, the plasma Ten minutes after the generating device 2 starts to discharge, the plasma activated water can be introduced into the cleaning device 5 for cleaning and sterilization.

As shown in Figure 7, for the bactericidal effect of different cleaning times when cleaning broccoli, each curve is the colony of broccoli in the refrigerator after an equal amount of plasma-activated water in cleaning device 5 cleans and sterilizes broccoli of the same quality for different times. The recovery process (CK is the blank control group). In the same way, choosing a cleaning time of 20 minutes can better balance the effects of sterilization and energy saving.

As shown in Figure 8, it is the bactericidal effect corresponding to different qualities of broccoli when cleaning broccoli. Each curve is in the cleaning device 5. Under the same time, 1 liter of plasma-activated water cleans and sterilizes broccoli of different qualities for different times. After that, broccoli colony recovery process in the refrigerator (CK is the blank control group). In the same way, washing 100 grams of broccoli per 1 liter of water can better take into account the effect of sterilization and energy saving.

If it is necessary to wash 100 grams of broccoli, the amount of plasma-activated water needed is calculated to be 1 liter, and the preset cleaning time is 20 minutes, and the discharge time (plasma reaction time) is 10 minutes.

Step S3: Start the gas drainage device 1 and the plasma generator 2, and introduce an external water source into the water tank 4.

Start the gas drainage device 1 and the plasma generator 2, and introduce an external water source into the water tank 4.

Step S4: After the plasma reacts in the water tank 4 and reaches the preset reaction time, restore the communication between the water tank 4 and the cleaning device 5, and make the plasma activated water enter the cleaning device 5 to reach the amount of plasma activated water, then cut off the connection between the water tank 4 and the cleaning device 5. Communication between devices 5.

After the gas drainage device 1 runs for 10 minutes, that is, after the plasma reaction in the water tank 4 reaches the preset reaction time of 10 minutes, the cleaning water inlet 52 is opened to restore the communication between the water tank 4 and the cleaning device 5 . The plasma-activated water enters the cleaning device 5 under the action of the first water pump and reaches 1 liter of plasma-activated water. At this time, the cleaning water inlet 52 is closed, and the communication between the water tank 4 and the cleaning device 5 is cut off. If fruit and vegetable needs to be soaked and washed, then the amount of water can be increased to submerge the leakage tray 54 .

Step S5: Start the cleaning device 5, and turn off the cleaning device 5 after a preset cleaning time.

Start the cleaning device 5, and under the action of the second water pump and the rotating motor, the nozzle sprays and cleans the broccoli. After reaching the preset cleaning time of 20 minutes, close the cleaning device 5 to end the cleaning, and open the cleaning device 5. The water outlet 53 discharges water.

In a plasma-activated water sterilization method provided by the present invention, a gas drainage device 1, a plasma generation device 2, a water tank 4 and a cleaning device 5 connected in sequence are provided, and the gas drainage device 1 sucks external air into the plasma generation device 2 It is ionized into plasma, and the ionized plasma is blown into the water tank 4 . After introducing the plasma, the water tank 4 reacts with the introduced external water source to generate plasma-activated water, and transports the generated plasma-activated water to the cleaning device 5 . Finally, the cleaning device 5 uses the plasma-activated water to clean the articles to achieve the effect of sterilization and preservation. Through the system of the present invention, the plasma can be directly ionized from the air, and it can be fully reacted in water to generate plasma activated water, and the plasma activated water is used to clean the articles. In addition to the conventional cleaning function, it also fully utilizes the The excellent sterilizing function of plasma can sterilize fruits and vegetables and other items, so that the washed fruits and vegetables can also have a long-term freshness preservation effect. It effectively kills pathogenic bacteria and harmful microorganisms on fruits and vegetables without causing serious loss to the sensory and nutritional quality of fruits and vegetables, and overcomes the problems existing in traditional sterilization methods. The invention is suitable for the sterilization treatment of fruits and vegetables by means of plasma activated water cleaning.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A plasma-activated water sterilization system is characterized in that, comprising: a gas drainage device, a plasma generator, a water tank and a cleaning device communicated in sequence, and the plasma generator is used to ionize air into plasma, so The gas drainage device is used to inhale air and blow the plasma into the water tank, the water tank is used to introduce the plasma to react with water to generate plasma-activated water, and deliver the plasma-activated water to the cleaning device, the cleaning device For cleaning items with plasma activated water. 2. The plasma-activated water sterilization system according to claim 1, wherein the plasma generating device comprises a high-voltage electrode unit and a low-voltage electrode unit, and the high-voltage electrode unit comprises a high-voltage electrode and a first The dielectric layer, the low-voltage electrode unit includes a uniformly bonded low-voltage electrode and a second dielectric layer, and the first dielectric layer and the second dielectric layer are parallel to each other. 3. The plasma-activated water sterilization system according to claim 2, characterized in that the distance between the first medium layer and the second medium layer is 5-10 mm. 4. The plasma-activated water sterilization system according to claim 1, wherein the water tank is provided with a water tank inlet, a water tank outlet and a water tank inlet, and the water tank inlet is communicated with the plasma generator , the water outlet of the water tank is connected with the cleaning device, the first water pump is arranged in the water tank, the first water pump introduces the external water source into the water tank through the water inlet of the water tank, and delivers the plasma activated water to the cleaning device through the water outlet of the water tank . 5. The plasma-activated water sterilization system according to claim 1, wherein the cleaning device comprises: a casing, a leaking tray, a spray unit and a second water pump, and the casing is provided with a cleaning water inlet and a cleaning The water outlet, the cleaning water inlet is connected with the water tank, the leaking tray is set in the box, the spray unit includes a column and an upper spray head, the column is hollow, and a water hole is provided at the bottom of the column, and the column is provided In the box, the upper nozzle communicates with the column and is arranged above the leaking tray, the upper nozzle faces the leaking tray, and the second water pump is used to pump the plasma-activated water to the column through the water hole, and through the upper Nozzle sprays out. 6. The plasma-activated water sterilization system according to claim 5, wherein the spray unit also includes a lower nozzle, which is connected to the column and is arranged below the leaking tray, and the lower nozzle faces the leakage tray. 7. The plasma-activated water sterilization system according to claim 6, wherein the spraying unit further comprises a rotating motor for driving the column to rotate around the axis. 8. The plasma-activated water sterilization system according to claim 7, wherein a water level sensor is provided in the box, a pressure sensor is provided in the leaking tray, and the cleaning device also includes a control unit for Calculate the amount of plasma activated water and the preset cleaning time according to the received fruit and vegetable type data and pressure sensor data, control the opening and closing of the cleaning water inlet according to the plasma activated water amount and water level sensor data, and control the second water pump and rotating motor according to the preset cleaning time running time. 9. The plasma-activated water sterilization system according to any one of claims 1 to 8, characterized in that, the plasma generator and the water tank are communicated through a gas distribution device, and the gas distribution device includes sequentially connected Air intake pipe, air tank and air outlet pipe, the air inlet pipe communicates with the plasma generating device through a rubber tube, the air outlet pipes are several, and are respectively connected to the water tank through rubber pipes, the air inlet pipe and the air outlet pipe are all provided with There is a non-slip part, and the inside of the air box is hollow. 10. A plasma-activated water sterilization method, applied to the plasma-activated water sterilization system according to any one of claims 1 to 9, characterized in that it comprises: Put the fruits and vegetables to be sterilized into the cleaning device, and cut off the communication between the water tank and the cleaning device; Calculate the amount of plasma activated water and preset cleaning time according to the type and quality of fruits and vegetables; Start the gas drainage device and the plasma generating device, and introduce an external water source into the water tank; After the plasma reaction in the water tank reaches the preset reaction time, the communication between the water tank and the cleaning device is restored, and after the plasma activated water enters the cleaning device to reach the amount of plasma activated water, the communication between the water tank and the cleaning device is cut off; Start the cleaning device and turn off the cleaning device after the preset cleaning time.