A plasma-activated water spray disinfection gate

Abstract

The present invention relates to a plasma-activated water spray disinfection gate, which includes a gate channel, and an activated water generating mechanism and a spray mechanism arranged in the gate channel. Among them, the water inlet end of the activated water generating mechanism is connected to an external water supply component, and the water outlet end is connected to the spray mechanism. Compared with the prior art, in the present invention, a closed airbag is designed in the flowing water pipe, and plasma is generated by discharging in the airbag. The active oxygen in the plasma dissolves in water to become active water. The active oxygen diffuses in water and enters the spray pipe along with the water flow. The active water is atomized into micro-droplets by a spray head and sprinkled into the air. The micro-droplets are sprinkled onto the surface of an object passing through the gate channel under the drive of a fog-dispersing fan to achieve the surface disinfection effect. During the flight of the micro-droplets in the air, the active oxygen volatilizes from the micro-droplets and reacts with bacteria and viruses in the air, causing the bacteria and viruses to become inactivated, achieving the air disinfection effect.

Description

Technical Field

[0001] The invention belongs to the technical field of disinfection treatment and relates to a plasma activated water spray disinfection gate. Background Art

[0002] Plasma sterilization technology is also an efficient disinfection solution. However, air discharge plasma will synthesize a large amount of harmful substances such as ozone and nitrogen oxides, which will cause secondary pollution. It is not suitable for scenarios where people are present, such as vehicles, nor for application scenarios with food.

[0003] Although ultraviolet light / photocatalysis above 200nm does not produce ozone, its disinfection rate is low and requires a long disinfection time. It is not suitable for fast-through flow disinfection operations. In addition, there are many dead corners that cannot be illuminated by ultraviolet light in a straight line, and disinfection is not thorough.

[0004] Chemical disinfectants are often used in logistics and customs clearance vehicle and article disinfection sites. Chemical disinfectants and their reaction products will remain on the surface of vehicles and articles for a long time, corrosive to the vehicles and articles, and chemical disinfectants that evaporate into the air will pollute the air.

[0005] Plasma activated water is rich in reactive oxygen species (ROS), which are strong oxidants and have a strong disinfecting effect on bacteria and viruses. ROS has a short lifespan and is inactivated after reacting with bacteria, viruses or air molecules, turning into stable oxygen molecules, which are one of the main components of air and do not produce secondary pollutants. It is a safe and environmentally friendly disinfectant and can replace chemical disinfectants. Water that has just been activated by plasma has the best sterilization and disinfection effect. After the plasma treatment stops, the disinfecting factor ROS in the activated water will be rapidly inactivated, and the sterilization and disinfection effect will decrease monotonically over time, and it will almost completely fail after about tens of minutes. Therefore, plasma activated water must be produced and used immediately, and activated water production equipment that can be produced and used immediately is required. At present, there is no public activated water production technology and equipment that can achieve immediate production and use. Summary of the invention

[0006] The purpose of the present invention is to provide a plasma activated water spray disinfection gate.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A plasma activated water spray disinfection gate comprises a gate, and an activated water generating mechanism and a spray mechanism arranged in the gate, wherein the water inlet end of the activated water generating mechanism is connected to an external water supply component, and the water outlet end is connected to the spray mechanism.

[0009] Further, the activated water generating mechanism consists of an electric control room and a reaction chamber. Among them, a reaction tube is arranged in the reaction chamber, and a discharge electrode is also arranged in the reaction tube. A high-voltage power supply is arranged in the electric control room, and the high-voltage power supply is also connected to the discharge electrode and supplies power to it.

[0010] Furthermore, the reaction tube consists of a main water inlet pipe and discharge tubes arranged in an array in the water inlet direction. Among them, both ends of the main water inlet pipe are respectively connected to an external water supply component and a spraying mechanism. One end of the discharge tube is open and communicates with the upper end of the main water inlet pipe, and the other end is closed. The discharge electrode passes through the closed end of the discharge tube and extends into its interior.

[0011] More preferably, a glass tube shell is also sleeved on the part of the discharge electrode extending into the discharge tube, and the upper end of the discharge electrode is also exposed outside the discharge tube.

[0012] More preferably, the discharge electrodes on two adjacent discharge tubes are respectively connected to two output electrodes of the high-voltage power supply.

[0013] More preferably, when water flows through the main water inlet pipe, a closed airbag is formed in the area beside the discharge electrode inside any discharge tube.

[0014] More preferably, an inlet solenoid valve and an outlet solenoid valve are respectively arranged at both ends of the main water inlet pipe.

[0015] Furthermore, a cooling fan is also arranged in the electric control room beside the high-voltage power supply.

[0016] Further, the spraying mechanism includes a spraying pipe connected to the water outlet end of the activated water generating mechanism. The spraying pipe is arranged on the inner wall of the gateway, and a number of spray heads are also distributed on the spraying pipe.

[0017] Furthermore, a number of fog-dispersing fans are also arranged on the gateway beside the spray heads.

[0018] Compared with the prior art, the present invention directly disinfects the bacteria and viruses on the surface of an object in a liquid phase by spraying active water mist onto the surface to be disinfected and killed, and the active water is atomized to release gaseous reactive oxygen species (ROS) to kill the bacteria and viruses in the air and on the surface of the object in a gaseous phase. The synergistic effect of gas and liquid phase disinfection and killing achieves the purpose of quickly and efficiently disinfecting and killing the vehicles and articles passing through the disinfection gateway. The active water mist is highly efficient and safe, and is non-toxic, harmless and has no side effects on the personnel and food in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic structural diagram of the activated water generating mechanism;

[0021] Description of the markings in the figure:

[0022] 1 - Reaction tube, 2 - Main water inlet pipe, 3 - Discharge tube, 4 - Discharge electrode, 5 - Water inlet solenoid valve, 6 - Flow meter, 7 - Water outlet solenoid valve, 8 - High - voltage power supply, 9 - Cooling fan, 10 - Spray pipe, 11 - Spray head, 12 - Mist - driving fan. Specific embodiments

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives detailed implementation manners and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0024] The activated water spray disinfection gate of the present invention will be described in detail below.

[0025] As Figure 1 and Figure 2 shown, the present invention provides a plasma - activated water spray disinfection gate, which includes a gate channel, and an activated water generating mechanism and a spray mechanism arranged in the gate channel. Among them, the water inlet end of the activated water generating mechanism is connected to an external water supply component, and the water outlet end is connected to the spray mechanism.

[0026] In some embodiments, the activated water generating mechanism is composed of an electric control room and a reaction chamber. Among them, a reaction tube 1 is provided in the reaction chamber, and a discharge electrode 4 is also provided in the reaction tube 1. A high - voltage power supply 8 is provided in the electric control room, and the high - voltage power supply 8 is also connected to the discharge electrode 4 and supplies power to it. Since the activity of plasma - activated water will rapidly decline over time and cannot be separated from the production site and the use site like chemical disinfectants, plasma - activated water must be produced and used immediately. Therefore, a plasma - activated water generating mechanism that can be used immediately is a key device for applying plasma - activated water to various scenarios. The device of the present invention is connected to an external water supply component (such as a water pipe), the power switch of the device is started, and with one - key start, active water is continuously output immediately.

[0027] Specifically, the reaction tube 1 can be composed of a main water inlet pipe 2 and discharge tubes 3 arranged in an array in the water inlet direction. Among them, both ends of the main water inlet pipe 2 are respectively connected to an external water supply component and the spray mechanism. One end of the discharge tube 3 is open and communicates with the upper end of the main water inlet pipe 2, and the other end is closed. The discharge electrode 4 passes through the closed end of the discharge tube 3 and extends into its interior. Designing a discharge chamber array on the main water inlet pipe 2 is the best solution for an immediately - usable plasma - activated water device, which can minimize the distance from the plasma - activated water production area to the application terminal, greatly reduce the activity decay of active water from production to application, and is a key design for the activity of active water.

[0028] In a more preferred embodiment, a glass tube shell is further sleeved on the part of the discharge electrode 4 extending into the discharge tube 3, and the upper end of the discharge electrode 4 is still exposed outside the discharge tube 3. A dielectric is wrapped at the discharge end of the discharge electrode 4 to prevent thermoelectric arc discharge. The liquid level in the discharge tube 3 will rise and fall due to the change of the temperature in the discharge tube 3 with the discharge time and power, which will lead to unstable discharge until it goes out. The design of the present invention is to extend the discharge electrode 4 with a glass shell into the discharge tube 3. No matter how the liquid level rises and falls during the discharge process, stable discharge can still be achieved, which is the key design for the stability of the discharge plasma.

[0029] In a more preferred embodiment, the discharge electrodes 4 on two adjacent discharge tubes 3 are respectively connected to the two output electrodes of the high-voltage power supply 8. In addition, the discharge electrodes 4 on two spaced-apart discharge tubes 3 are connected to the same output electrode of the high-voltage power supply 8. In this way, any one discharge tube 3 and the adjacent discharge tubes 3 on the left and right form a minimum discharge unit. The discharge path between the discharge electrodes 4 includes the airbag and water between the adjacent discharge tubes 3. Therefore, all the discharge tubes 3 separated by one discharge tube 3 are connected in parallel to the same output end of the high-voltage power supply 8. That is, starting from one end of the reaction tube 1 and numbering all the discharge tubes 3 in sequence to the other end, all the odd-numbered discharge tubes 3 are connected in parallel to one output end of the high-voltage power supply 8, and all the even-numbered discharge tubes 3 are connected in parallel to the other output end of the high-voltage power supply 8. The design of the discharge electrode 4 of the present invention enables the water between the discharge tubes 3 to only serve as the medium in the discharge channel. There is only ionic displacement current in the water medium, no electric potential is generated in the tap water system, and it is not disturbed by the tap water system either, which is the key design for the stability and reliability of the discharge.

[0030] In a more preferred embodiment, when water flows through the main inlet pipe 2, a closed airbag is formed in the area beside the discharge electrode 4 inside any discharge tube 3. Here, it is only necessary to ensure that the discharge tube 3 is located above the main inlet pipe 2, and it is preferably set that the discharge tube 3 is perpendicular to the main inlet pipe 2.

[0031] Since the main gas component in the closed airbag is water vapor, only reactive oxygen species (ROS) are synthesized when plasma is generated by discharging in the closed airbag, avoiding the synthesis of harmful by-products such as reactive nitrogen species (RNS). The closed airbag can generate a higher concentration of reactive oxygen species (ROS) than the traditional open discharge plasma, and the disinfection power of the activated water is doubled.

[0032] In a more preferred embodiment, an inlet solenoid valve 5 and a flow meter 6 are further provided at one end of the main inlet pipe 2, and an outlet solenoid valve 7 is provided at the other end.

[0033] In a more specific embodiment, a cooling fan 9 is further provided in the electric control room beside the high-voltage power supply 8.

[0034] In some embodiments, the spraying mechanism includes a spray pipe 10 connected to the water outlet end of the activated water generating mechanism. The spray pipe 10 is arranged on the inner wall of the gateway, and a number of spray heads 11 are also distributed on the spray pipe 10.

[0035] In a more specific embodiment, a number of fog-driving fans 12 are also arranged on the gateway beside the spray heads 11.

[0036] In some embodiments, the gateway is a rectangular channel that is open at both ends and closed on all sides.

[0037] Specifically, in the present invention, when the high-voltage power supply 8 outputs a high voltage, a high electric field is formed between the discharge electrodes 4 inside the adjacent discharge tubes 3 and the liquid surface under the closed airbag. The high electric field breaks down the gas in the airbag and discharges, generating plasma. The reactive oxygen in the plasma dissolves in water and becomes activated water. The reactive oxygen diffuses in the water and enters the spray pipe 10 along with the water flow. The activated water is atomized into micro-droplets by the spray heads 11 and sprinkled into the air. The micro-droplets are sprinkled onto the surface of the object passing through the gateway under the drive of the fog-driving fan 12 (which can also be not provided according to needs), achieving the surface disinfection effect. During the flight of the micro-droplets in the air, the reactive oxygen volatilizes from the micro-droplets and reacts with the bacteria and viruses in the air, causing the bacteria and viruses to inactivate, achieving the air disinfection effect. The discharge occurs in the closed airbag of the discharge tube 3. The gas and water in the airbag are both discharge media. The discharge occurs on the water surface inside the discharge tube 3, and the airbag becomes plasma. The plasma decomposes water molecules to generate a large amount of reactive oxygen ROS components. This is the key design for highly selective synthesis of reactive oxygen ROS.

[0038] In addition, during the discharge of the discharge tubes 3 arranged in an array, as long as there is water flow through the reaction tube 1, the ionic displacement current in the water between the water flow and the adjacent discharge tubes 3 merges, driving the reactive oxygen ROS into the water flow. The reactive oxygen in the plasma of the discharge tube 3 dissolves into the water and then migrates into the water flow of the main inlet pipe 2. Inside the discharge tube 3, from top to bottom, there is a concentration gradient of reactive oxygen, high at the top and low at the bottom. The concentration gradient causes the reactive oxygen to diffuse into the main pipe water flow. Due to the existence of displacement current in the water medium of the adjacent discharge tubes 3, the turbulence between the water medium in the discharge tubes 3 and the water flow in the main inlet pipe 2 is promoted, strengthening the transport of reactive oxygen into the water flow and reducing the upper and lower gradient difference of the reactive oxygen concentration.

[0039] ROS is a powerful oxidation factor, which is easy to react with viruses or bacteria, destroy the cell membrane and DNA structure or cause bacterial metabolic disorders, resulting in the inactivation of both. The virus and bacteria are inactivated, achieving the purpose of disinfection and sterilization. After the inactivation of ROS, it returns to the stable state oxygen molecule and will not generate toxic and harmful substances to stay for a long time. The inactivated activated water is ordinary water. Therefore, plasma-activated water is a safe disinfectant and can be widely used in scenarios of disinfecting people and food, especially suitable for disinfecting public health places.

[0040] The above embodiments will be described in more detail below in conjunction with specific embodiments.

[0041] Embodiment 1:

[0042] The activated water spray disinfection gate of this embodiment is shown in Figure 1 and Figure 2 and includes a gate, as well as an activated water generating mechanism and a spray mechanism arranged in the gate. The activated water generating mechanism consists of an electric control room and a reaction chamber. Among them, a reaction tube 1 is provided in the reaction chamber, and a discharge electrode 4 is also provided in the reaction tube 1. A high-voltage power supply 8 is provided in the electric control room. The reaction tube 1 is composed of a main water inlet pipe 2 and discharge tubes 3 arranged in an array in the water inlet direction. Among them, both ends of the main water inlet pipe 2 are respectively connected to an external water supply component and the spray mechanism. One end of the discharge tube 3 is open and communicates with the upper end of the main water inlet pipe 2, and the other end is closed. The discharge electrode 4 passes through the closed end of the discharge tube 3 and extends into its interior. A glass tube shell is also sleeved on the part of the discharge electrode 4 extending into the discharge tube 3, and the upper end of the discharge electrode 4 is also exposed outside the discharge tube 3. The discharge electrodes 4 on adjacent two discharge tubes 3 are respectively connected to two output electrodes of the high-voltage power supply 8. A cooling fan 9 is also provided in the electric control room beside the high-voltage power supply 8. The spray mechanism includes a spray pipe 10 connected to the water outlet end of the activated water generating mechanism. The spray pipe 10 is arranged on the inner wall of the gate, and a number of spray heads 11 are also distributed on the spray pipe 10.

[0043] In this embodiment, the inactivation rate test of Staphylococcus aureus on the surface of items is carried out in a micro-gate. The micro-gate is a square channel with a length of 5 meters, a width of 2 meters, and a height of 2 meters. The four sides of the channel are closed, and the two ends are open. 40 spray heads 11 are evenly arranged on the inner walls of the four sides of the channel. Since the cross-section of the gate is small, the fog-dispersing fan 12 is not used. The activated water generating mechanism is installed outside the micro-gate. The discharge power of the activated water generating mechanism is 500W, and the water flow rate is 0.8L / min.

[0044] A Staphylococcus aureus strain sample is pasted in the middle of each of the six faces of a 30×30×30 cm cardboard box, and the cardboard box is placed on a small perforated trolley. One minute after starting the activated water generating mechanism, the rope tied to the trolley is pulled at the other end of the micro-gate. The trolley carries the cardboard box and slowly passes through the micro-gate at an approximately uniform speed. The passing time through the gate is 30 seconds. Five minutes after the trolley comes out of the gate, the Staphylococcus aureus strain samples on the surface of the cardboard box are taken off and put into a cell incubator for culturing for 48 hours. After taking them out and counting and calculating, the average sterilization rate of the Staphylococcus aureus strain is 99.2%.

[0045] Generally speaking, in the present invention, a closed airbag is designed in a flowing water pipe, plasma is generated by discharging electricity in the airbag, the reactive oxygen in the plasma dissolves in water to become active water, the reactive oxygen diffuses in the water and enters the spray pipe 10 along with the water flow, the active water is atomized into micro-droplets by the spray head 11 and sprinkled into the air, and the micro-droplets are then sprinkled onto the surface of an object passing through the gateway, achieving the surface disinfection effect. During the flight of the micro-droplets in the air, the reactive oxygen volatilizes from the micro-droplets and reacts with bacteria and viruses in the air, inactivating the bacteria and viruses, achieving the air disinfection effect.

[0046] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. A plasma-activated water spray disinfection gate, Characterized in that, It includes a gate channel, and an activated water generating mechanism and a spray mechanism arranged in the gate channel. Among them, the water inlet end of the activated water generating mechanism is connected to an external water supply component, and the water outlet end is connected to the spray mechanism; The activated water generating mechanism is composed of an electric control room and a reaction chamber. Among them, a reaction tube is provided in the reaction chamber, and a discharge electrode is also provided in the reaction tube. A high-voltage power supply is provided in the electric control room, and the high-voltage power supply is also connected to the discharge electrode and supplies power to it; The reaction tube is composed of a main water inlet pipe and discharge tubes arranged in an array in the water inlet direction. Among them, both ends of the main water inlet pipe are respectively connected to an external water supply component and a spray mechanism. One end of the discharge tube is open and communicates with the upper end of the main water inlet pipe, and the other end is closed. The discharge electrode passes through the closed end of the discharge tube and extends into its interior; The part of the discharge electrode extending into the discharge tube is also sleeved with a glass tube shell, and the upper end of the discharge electrode is also exposed outside the discharge tube; The discharge electrodes located on adjacent two discharge tubes are also respectively connected to two output electrodes of the high-voltage power supply; When water flows through the main water inlet pipe, a closed airbag is formed in the area beside the discharge electrode inside any discharge tube.

2. The plasma-activated water spray disinfection gate according to claim 1, Characterized in that, An inlet solenoid valve and an outlet solenoid valve are respectively provided at both ends of the main water inlet pipe.

3. The plasma-activated water spray disinfection gate according to claim 1, Characterized in that, A cooling fan is also provided in the electric control room beside the high-voltage power supply.

4. The plasma-activated water spray disinfection gate according to claim 1, Characterized in that, The spray mechanism includes a spray pipe connected to the water outlet end of the activated water generating mechanism. The spray pipe is arranged on the inner wall of the gate channel, and a number of spray heads are also distributed on the spray pipe.

5. The plasma-activated water spray disinfection gate according to claim 4, Characterized in that, A number of fog-driving fans are also arranged on the gate channel beside the spray heads.

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