A device for preparing plasma-activated water

Abstract

The application relates to a plasma-activated water preparation device, which comprises a water tank with a containing cavity, an electrode assembly arranged in the containing cavity and close to the bottom of the water tank, the electrode assembly comprising a sleeve with a discharge cavity and a discharge electrode at least partially extending into the discharge cavity, the sleeve and the discharge electrode being arranged below the liquid level of the liquid in the containing cavity, and a gas feeding assembly communicating with the sleeve and used for feeding gas into the discharge cavity, the gas being mixed with the liquid in the water tank after flowing through the electrode assembly and generating discharge. In the application, the electrode assembly is arranged at the bottom of the water tank, the sleeve and the discharge electrode are arranged below the liquid level of the liquid in the containing cavity, and the sleeve is immersed in the liquid without being exposed to air, so that the suspended potential at the position where the sleeve, the water tank and the discharge electrode are connected can be avoided due to high temperature and high humidity, the creeping arc phenomenon can be avoided, and the safety performance of the whole device can be improved.

Description

Technical Field

[0001] This invention relates to the field of activated water preparation technology, and particularly to a plasma activated water preparation apparatus. Background Technology

[0002] The substances generated by discharge in a gas have a bactericidal effect. Furthermore, treating plasma under atmospheric pressure yields activated water with a low pH and high redox potential. Plasma-activated water possesses strong sterilization and preservation capabilities, and is therefore widely used in cleaning, sterilization, wastewater treatment, and fruit and vegetable preservation.

[0003] Chinese patent (publication number: CN 216878791U) discloses a plasma-activated water preparation device. Because the upper end of the electrode assembly is exposed above the water level in the tank, the connection between the tank cover and the discharge is prone to aging under high temperature and high humidity conditions for a long time. This can lead to floating potential at the tank cover, causing creepage, arcing and sparking, which poses a safety hazard. Summary of the Invention

[0004] This invention provides a plasma-activated water preparation device to solve the problem of electric creep and sparking that occurs during long-term operation of existing equipment.

[0005] This invention provides a plasma-activated water preparation apparatus, which includes:

[0006] Water tank, with a containing cavity;

[0007] An electrode assembly is located within the accommodating cavity and near the bottom of the water tank. The electrode assembly includes a sleeve with a discharge chamber and a discharge electrode that extends at least partially into the discharge chamber. Both the sleeve and the discharge electrode are located below the liquid level of the liquid-bearing area within the accommodating cavity.

[0008] The gas supply assembly, connected to the sleeve, is used to supply gas into the discharge chamber. After the gas flows through the electrode assembly and generates a discharge, it can mix with the liquid in the water tank.

[0009] Optionally, the plasma-activated water preparation apparatus further includes:

[0010] The ground electrode is placed in the liquid inside the water tank, and both the discharge electrode and the ground electrode are electrically connected to a high-voltage power supply.

[0011] Optionally, the sleeve is spiral-shaped; the discharge electrode extends along the centerline of the spiral sleeve.

[0012] Preferably, the spiral sleeve, which is spiral in shape from bottom to top, has an arc radius that gradually increases.

[0013] Preferably, the sleeve has an air inlet and an air outlet communicating with the discharge cavity, and the air supply assembly is communicating with the air inlet of the sleeve;

[0014] The air outlet of the sleeve is higher than the air inlet of the sleeve and lower than the liquid level in the water tank.

[0015] Optionally, the electrode assembly is configured as a plurality of electrodes, which are arranged at intervals on the inner bottom wall of the water tank;

[0016] The sleeves of each electrode assembly are connected to the gas supply assembly.

[0017] Optionally, the plasma-activated water preparation apparatus further includes:

[0018] An airflow distribution assembly is installed on the bottom plate of the water tank. The airflow distribution assembly has an airflow channel that communicates with the air supply assembly and the sleeves. The air supply assembly is connected to multiple sleeves through the airflow channel. The airflow channel is adapted to distribute the gas from the air supply assembly to each sleeve and then inflate it.

[0019] Furthermore, the plasma-activated water preparation device also includes:

[0020] The electrode connection bar, the high-voltage power supply, and multiple discharge electrodes are all electrically connected to the electrode connection bar, and each discharge electrode is electrically connected to the high-voltage power supply through the electrode connection bar.

[0021] Optionally, the air delivery assembly includes:

[0022] An air supply pipe, wherein the air inlet end of the air supply pipe is connected to the top of the water tank, and the air outlet end of the air supply pipe is connected to the airflow channel within the airflow distribution assembly;

[0023] An air pump, installed on the air supply pipe, is used to drive the gas in the water tank to enter from the air inlet end of the air supply pipe and flow out from the air outlet end after passing through the air supply pipe.

[0024] Optionally, the air supply assembly further includes:

[0025] A valve is installed on the gas supply pipe.

[0026] Compared with the prior art, the advantages of the present invention are as follows:

[0027] 1. In this embodiment of the invention, the electrode assembly is installed at the bottom of the water tank, with the sleeve and discharge electrode located below the liquid surface in the containment cavity. The sleeve is immersed in the liquid and not exposed to the air. Based on the principle that plasma is generated by discharge in a gas, the installation method of the electrode assembly in this embodiment can avoid the formation of a floating potential at the connection point of the sleeve, water tank and discharge electrode due to high temperature and humidity, thus avoiding creepage and arcing. This can improve the overall safety performance of the device and extend its service life.

[0028] 2. In this embodiment of the invention, one end of the high-voltage power supply is electrically connected to the discharge electrode, and the other end is electrically connected to the ground electrode. The ground electrode extends into the liquid in the water tank and is in direct contact with the liquid, so that the water potential is zero. When the plasma activated water preparation device has a discharge leakage abnormality, the high potential can be conducted away through the ground electrode, which plays a protective role and can further improve the overall safety performance of the device.

[0029] 3. Compared with traditional straight tube electrodes, the discharge electrode and sleeve in this embodiment of the invention adopt a spiral structure design. On the one hand, the spiral structure of the discharge electrode can effectively increase the discharge path and discharge area, thereby improving the discharge capability of the discharge electrode. On the other hand, the spiral structure of the sleeve can reduce its vertical height under the same discharge area, so that the air outlet of the sleeve is closer to the bottom of the water tank, so that the plasma can stay in the gas-liquid mixing area for a longer time after flowing out of the air outlet of the sleeve. Therefore, it can improve the gas-liquid mixing efficiency, improve the plasma-water mixing efficiency, and thus improve the disinfectant preparation efficiency.

[0030] By changing the pitch of the sleeve and the discharge electrode, the gas-liquid mixing efficiency can be improved, thereby increasing the preparation efficiency.

[0031] 4. In this embodiment of the invention, the air outlet of the sleeve is a micro-hole formed on the sleeve, and multiple micro-holes are arranged at intervals along the circumference of the sleeve. By reducing the aperture of the air outlet of the sleeve, under the same pressure conditions of the air supply assembly, the gas in the discharge chamber can be injected into the liquid from the air outlet at a greater pressure, that is, the gas flow rate can be increased, thereby improving the gas-liquid mixing efficiency and thus improving the disinfectant preparation efficiency. On the other hand, it can prevent the liquid in the water tank from entering the discharge chamber from the air outlet of the sleeve.

[0032] 5. The working principle of the plasma-activated water preparation device in this embodiment of the invention is as follows: First, the air pump is started, which transports the gas from the top of the water tank to the airflow channel in the airflow distribution assembly. After passing through the airflow channel, the uniform air enters the sleeves of each electrode assembly. The high-voltage power supply is then turned on, and the discharge electrode generates a large amount of plasma and air mixed gas after being energized. This mixed gas exits from the outlet on the sleeve and mixes with the aqueous solution in the gas-liquid mixing area, producing a series of chemical reactions that generate active particles such as hydrogen peroxide, nitrate, and peroxynitrite. These particles are the main factors that damage bacterial cell membranes. The incompletely mixed plasma gas re-enters the air pump for the next cycle. Multiple cycles can increase the efficiency of plasma generation, thereby improving the efficiency of activated water preparation. Attached Figure Description

[0033] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0034] Figure 1 This is a schematic diagram of a plasma-activated water preparation device;

[0035] Figure 2 yes Figure 1 Axonometric view of the plasma-activated water preparation device after removing the top cover and gas supply assembly;

[0036] Figure 3 yes Figure 2 Top view;

[0037] Figure 4 yes Figure 1 A partial enlarged view of point A in the plasma-activated water preparation device;

[0038] Figure 5 This is a top view of the electrode assembly;

[0039] Figure 6 yes Figure 5 Cross-sectional view of the middle electrode assembly along the BB direction;

[0040] Figure 7 yes Figure 5 A magnified view of the middle electrode assembly at point C;

[0041] Figure 8 This is a structural schematic diagram of the first plate.

[0042] Figure 9 This is a schematic diagram of the electrode fixing plate;

[0043] Figure 10 This is a schematic diagram of the electrode connection bar.

[0044] Figure label:

[0045] 100. Gas-liquid mixing region;

[0046] 1. Water tank; 11. Top cover; 12. Base plate;

[0047] 2. Electrode assembly; 21. Sleeve; 211. Air inlet; 212. Air outlet micropore; 22. Discharge electrode;

[0048] 3. Air supply assembly; 31. Air supply pipe; 32. Air pump; 33. Valve;

[0049] 4. Ground electrode; 5. High-voltage power supply;

[0050] 6. Airflow distribution components;

[0051] 601. Airflow channel; 61. First plate; 611. First groove; 62. Second plate;

[0052] 7. Electrode connection bar;

[0053] 8. Electrode fixing plate; 81. Mounting slot;

[0054] 9. Sensors. Detailed Implementation

[0055] The invention will now be further described with reference to the accompanying drawings.

[0056] like Figures 1 to 10 As shown, it should be noted that Figure 1 The direction indicated by the middle arrow is the direction of gas flow.

[0057] The present invention provides a plasma-activated water preparation device, which includes a water tank 1, an electrode assembly 2 and an air supply assembly 3.

[0058] Specifically, such as Figures 1 to 4 As shown, the water tank 1 has a accommodating cavity that can hold liquid and gas. Optionally, the tank body of the water tank 1 includes a top cover 11, peripheral side walls, and a bottom plate 12, and the accommodating cavity of the water tank 1 is jointly defined by the top cover 11, peripheral side walls, and bottom plate 12. The water tank 1 can be rectangular, cubic, cylindrical, etc., and the shape of the water tank 1 is not limited in this embodiment. Figure 1 As shown, when liquid is injected into water tank 1, the liquid is located below the containment cavity of water tank 1, and the gas is above the containment cavity.

[0059] Electrode assembly 2 is disposed within the accommodating cavity and near the bottom of water tank 1. Electrode assembly 2 includes a sleeve 21 with a discharge cavity and a discharge electrode 22 that extends at least partially into the discharge cavity. Both sleeve 21 and discharge electrode 22 are located below the liquid surface within the accommodating cavity. Discharge electrode 22 is made of a metallic conductor and is connected to a high-voltage power supply 5 for generating plasma through high-voltage discharge. The plasma mixes and reacts with water in water tank 1 to generate substances such as peroxynitrite, hydrogen peroxide, nitric acid, and nitrite, which have anti-cancer and bactericidal functions, thus preparing plasma activation. Sleeve 21 is made of an insulating material, such as glass or resin.

[0060] In this embodiment of the invention, the electrode assembly 2 is installed at the bottom of the water tank 1. The sleeve 21 and the discharge electrode 22 are located below the liquid surface in the containment cavity. The sleeve 21 is immersed in the liquid and not exposed to the air. Based on the principle that plasma is generated by discharge in a gas, the installation method of the electrode assembly 2 in this embodiment can avoid the formation of a floating potential at the connection point of the sleeve 21, the water tank 1 and the discharge electrode 22 due to high temperature and humidity, avoid the phenomenon of creepage and arcing, improve the overall safety performance of the device, and extend the service life of the device.

[0061] The gas supply assembly 3 is connected to the discharge chamber of the sleeve 21. The gas supply assembly 3 is used to supply gas into the discharge chamber. The gas enters the discharge chamber of the sleeve 21 through the gas inlet 211 and discharges, generating a large amount of plasma. The mixed gas with air can flow out from the gas outlet of the sleeve 21. Under the high pressure of the gas supply assembly 3, the gas can blow away the liquid located at the gas outlet of the sleeve 21 to discharge the liquid in the discharge chamber and prevent water from entering the discharge chamber. When the gas flows through the discharge electrode 22 located in the discharge chamber, the discharge electrode 22 discharges after being energized with high voltage to generate a large amount of plasma and air mixed gas. After the mixed gas comes out from the gas outlet on the sleeve 21, it mixes with the aqueous solution located in the gas-liquid mixing region 100 and produces a series of chemical reactions to generate active particles such as hydrogen peroxide, nitrate, and peroxynitrite, thereby preparing plasma-activated water.

[0062] In this embodiment, the plasma-activated water preparation device is in a sealed state during operation. Both the water tank 1 and the sleeve 21 are connected to the gas supply component 3. Driven by the gas supply component 3, the gas in the water tank 1 can circulate back and forth between the water tank 1 and the gas supply component 3, preventing the ozone generated during the discharge process from being directly discharged to the outside world and causing pollution, thereby reducing ozone emissions.

[0063] like Figure 1 As shown, the plasma-activated water preparation device in this embodiment also includes a ground electrode 4.

[0064] The ground electrode 4 is immersed in the liquid in the water tank 1. Both the discharge electrode 22 and the ground electrode 4 are electrically connected to the high-voltage power supply 5. In this embodiment of the invention, one end of the high-voltage power supply 5 is electrically connected to the discharge electrode 22, and the other end is electrically connected to the ground electrode 4. The ground electrode 4 extends into the liquid in the water tank 1 and is in direct contact with the liquid, making the water potential zero. When the plasma-activated water preparation device experiences a discharge leakage abnormality, the high potential can be conducted away through the ground electrode 4, playing a protective role and further improving the overall safety performance of the device.

[0065] In this embodiment, the sleeve 21 is spiral-shaped; the discharge electrode 22 extends along the centerline of the spiral sleeve 21 and is disposed within the discharge cavity of the sleeve 21. Compared to traditional straight tube electrodes, both the discharge electrode 22 and the sleeve 21 in this embodiment of the invention adopt a spiral structure design, which has the following advantages:

[0066] On the one hand, the spiral structure of the discharge electrode 22 can effectively increase the discharge path and discharge area, thereby improving the discharge capacity of the discharge electrode 22. On the other hand, since the gas-liquid mixing efficiency is one of the main factors affecting the disinfectant preparation efficiency, and the mixing efficiency is related to the number of micropores, gas flow rate, and the length of contact time with water, the spiral structure of the sleeve 21 in this embodiment can reduce its longitudinal height under the same discharge area. This allows the outlet of the sleeve 21 to be closer to the bottom of the water tank 1, so that the plasma can stay in the gas-liquid mixing area 100 for a longer time after flowing out of the outlet of the sleeve 21. Therefore, the gas-liquid mixing efficiency can be improved, that is, the plasma-water mixing efficiency can be improved, thereby improving the disinfectant preparation efficiency. In addition, the gas-liquid mixing efficiency can be improved by reducing the pitch of the sleeve 21 and the discharge electrode 22, thereby improving the preparation efficiency.

[0067] As one implementation method, such as Figure 1 , Figure 2 , Figures 5 to 7 As shown, the radius of the spiral sleeve 21 gradually increases from bottom to top. In another embodiment, the radius of the spiral sleeve 21 may increase or decrease from bottom to top, as not shown in the figure. Of course, the radius of the spiral sleeve 21 can also be a fixed value; this embodiment does not limit it.

[0068] Of course, the sleeve and the discharge electrode set inside the sleeve can also be U-shaped, V-shaped, or wave-shaped, or a combination thereof, as not shown in the figure. Those skilled in the art can make adjustments according to actual needs, as long as the discharge path of the discharge electrode can be increased by changing the shape of the electrode at the same longitudinal height.

[0069] like Figure 1 , Figure 6 , Figure 7As shown, the sleeve 21 has an air inlet 211 and an air outlet that are connected to the discharge chamber, and the air supply component 3 is connected to the air inlet 211 of the sleeve 21; the air outlet of the sleeve 21 is higher than the air inlet 211 of the sleeve 21 and lower than the liquid level in the water tank 1.

[0070] Optionally, the air outlet of the sleeve 21 is an air outlet micro-hole 212 formed on the sleeve 21. Multiple air outlet micro-holes 212 are arranged at intervals along the circumference of the sleeve 21. By reducing the aperture of the air outlet of the sleeve 21, on the one hand, under the same pressure conditions of the air supply assembly 3, the gas in the discharge chamber can be injected into the liquid from the air outlet at a higher pressure, i.e., the gas flow rate can be increased, thereby improving the gas-liquid mixing efficiency and thus improving the disinfectant preparation efficiency. On the other hand, it can prevent the liquid in the water tank 1 from entering the discharge chamber through the air outlet micro-hole 212.

[0071] Preferably, the air inlet 211 of the sleeve 21 is located at one end of the sleeve 21; the air outlet of the sleeve 21 is located near the other end of the sleeve 21.

[0072] Optionally, such as Figures 1 to 3 As shown, multiple electrode assemblies 2 are configured, and these multiple electrode assemblies 2 are arranged at intervals on the inner bottom wall of the water tank 1; the sleeves 21 of each electrode assembly 2 are all connected to the air supply assembly 3. By setting multiple electrode assemblies 2, multiple electrode assemblies 2 can work simultaneously, which can improve the efficiency of the device in preparing plasma-activated water.

[0073] Optionally, such as Figure 1 , Figure 2 and Figure 4 As shown, the plasma-activated water preparation device also includes an airflow distribution assembly 6 installed on the base plate 12 of the water tank 1.

[0074] The airflow distribution assembly 6 has an airflow channel 601 that communicates with both the gas supply assembly 3 and the sleeves 21. The airflow channel 601 is used to distribute the gas from the gas supply assembly 3 to inflate each sleeve 21. The gas supply assembly 3 is connected to the discharge chamber of each sleeve through the airflow channel. The gas from the gas supply assembly is distributed through the airflow channel and then flows into the discharge chamber of each sleeve to inflate each sleeve. By setting the airflow distribution assembly 6, the gas can be distributed so that air enters each sleeve 21 evenly.

[0075] The airflow channel has an airflow inlet and multiple airflow outlets; the airflow inlet is connected to the air outlet end of the air delivery component; and the multiple airflow outlets are connected to multiple sleeves one by one.

[0076] Optionally, such as Figure 3 , Figure 4 , Figures 8 to 10As shown, the airflow distribution assembly 6 includes a first plate 61 and a second plate 62 that are fitted together. The first plate 61 is fixedly installed on the bottom plate 12 of the water tank 1, and the second plate 62 is fitted and fixedly installed on the bottom wall of the first plate 61. The first plate 61 is provided with a first groove 611, and the second plate 62 is provided with a corresponding second groove. When the first plate 61 and the second plate 62 are installed and connected, the first groove 611 and the second groove are interconnected and together define the airflow channel 601. The air inlet end of the sleeve 21 passes through the mounting hole on the bottom plate 12 of the water tank 1, and the air inlet 211 of the sleeve 21 is connected to the airflow channel 601.

[0077] Furthermore, the plasma-activated water preparation device also includes an electrode connection row 7.

[0078] The high-voltage power supply 5 and multiple discharge electrodes 22 are all electrically connected to the electrode connection bus 7, and each discharge electrode 22 is electrically connected to the high-voltage power supply 5 through the electrode connection bus 7. The electrode connection bus 7 can connect multiple discharge electrodes 22 together. One end of the high-voltage power supply 5 is connected to the electrode connection bus 7 to supply power to the discharge electrodes 22, and the other end of the high-voltage power supply 5 is connected to the ground electrode 4. Preferably, the electrode connection bus 7 has a sheet-like structure.

[0079] like Figure 3 , Figure 4 , Figures 8 to 10 As shown, the plasma activated water preparation device in this embodiment also includes an electrode fixing plate 8 for installing and fixing the electrode connection row 7. The electrode fixing plate 8 is attached to the bottom wall of the second plate 62. The electrode fixing plate 8 has an installation groove 81. The electrode connection row 7 is accommodated in the installation groove 81. The installation groove 81 is connected to the airflow channel 601 on the airflow distribution assembly 6. The electrical terminal of the discharge electrode 22 near the air inlet of the sleeve 21 passes through the installation hole on the bottom plate 12 of the water tank 1 and the airflow channel 601 in sequence, and then connects to the electrode connection row 7 in the installation groove 81.

[0080] As one implementation method, such as Figure 3 , Figure 4 , Figures 8 to 10 As shown, the electrode connection row 7 has an "X" shaped structure, with two strips on the "X" shaped electrode connection extending along the two diagonals of the bottom plate 12 of the water tank 1. Five sets of electrode assemblies 2 are provided, with one set located at the center of the bottom plate 12, two sets located along one diagonal of the bottom plate 12, and the remaining two sets located along the other diagonal. Preferably, the first groove 611 and the second groove are also correspondingly configured as an "X" shaped structure.

[0081] In other embodiments, the electrode assembly 2 is configured as two, three, or more groups, with the multiple groups of electrode assemblies 2 symmetrically distributed along the center line of symmetry of the water tank bottom plate (not shown in the figure). The shape of the electrode connecting strip used to connect the multiple groups of electrode assemblies is adapted to the distribution of the multiple groups of electrode assemblies, such that the projection of the multiple groups of electrode assemblies on the water tank bottom plate is located on the projection of the electrode connecting strip on the water tank bottom plate. Correspondingly, the shapes of the first groove on the first plate and the second groove on the second plate are adapted to the shape of the electrode connecting strip. Those skilled in the art can make adjustments according to specific actual needs. This embodiment does not limit the specific number of electrode assemblies, the specific arrangement, or the shape of the electrode connecting strip.

[0082] Optionally, such as Figure 1 As shown, the air supply assembly 3 includes an air supply pipe 31 and an air pump 32 connected to the air supply pipe 31. The air inlet end of the air supply pipe 31 is connected to the top of the water tank 1, and the air outlet end of the air supply pipe 31 is connected to the airflow channel 601 in the airflow distribution assembly 6. The air pump 32 is used to drive the gas in the water tank 1 to enter from the air inlet end of the air supply pipe 31 and flow out from the air outlet end after passing through the air supply pipe 31.

[0083] Optionally, the air supply assembly 3 also includes a valve 33 disposed on the air supply pipe 31. It is worth noting that when the air pump 32 is off, water in the water tank 1 can easily flow back into the air pipe from the airflow channel 601 at the bottom of the water tank 1. Therefore, adding an anti-backflow valve 33 to the air supply pipe 31 can effectively prevent water backflow from the water tank 1. The valve 33 is synchronized with the on / off state of the air pump 32; that is, the backflow valve opens when the air pump 32 is on, and closes when it is off.

[0084] Optionally, the plasma-activated water preparation apparatus also includes an automatic monitoring and control system, which includes an electrically connected data acquisition unit, processor, and control module.

[0085] The monitoring and control principle of the automatic monitoring and control system is as follows:

[0086] The data acquisition unit monitors parameters such as pH value, oxidation-reduction potential (ORP), and temperature of the activated water in real time and transmits these parameters to the processor. Preferably, the data acquisition unit is a sensor 9 installed on the air supply pipe 31.

[0087] The processor compares and analyzes the data received from the data acquisition unit with the expected targets to determine whether the current state has achieved the desired effect. For example, the expected sterilization efficiency may be set to 99%, the expected pH value to be 2.5, and the expected ORP to be 500. Of course, different parameters can be customized according to different needs to reduce energy loss and improve preparation efficiency. When it is detected that the current state cannot meet the expected effect, the processor feeds back to the control module.

[0088] After receiving feedback from the processor, the control module issues relevant instructions to each execution terminal, including a high-voltage power supply 5 and an air pump 32, thereby adjusting the discharge voltage and air flow rate. Optionally, the control module is a controller.

[0089] In this embodiment, the automatic monitoring and control system is in a real-time detection state to ensure that the current state is consistent with the expected value, which can effectively reduce the preparation cycle and improve the preparation efficiency.

[0090] The working principle of the plasma-activated water preparation device in this embodiment of the invention is as follows:

[0091] First, the air pump 32 is started. The air pump 32 transports the gas from the upper part of the water tank 1 to the airflow channel 601 in the airflow distribution component 6. After passing through the airflow channel 601, the air enters the sleeves 21 of each electrode component 2 evenly. When the discharge chamber of the sleeve 21 is filled with gas, the high-voltage power supply 5 is turned on. After the discharge electrode 22 is energized, it generates a large amount of plasma and air mixed gas. The mixed gas comes out from the gas outlet on the sleeve 21 and mixes with the aqueous solution in the gas-liquid mixing region 100, producing a series of chemical reactions to generate active particles such as hydrogen peroxide, nitrate, and peroxynitrite, thereby preparing plasma-activated water. The plasma gas that is not completely mixed re-enters the air pump 32 for the next cycle. Multiple cycles can increase the efficiency of plasma generation and thus improve the efficiency of activated water preparation.

[0092] Meanwhile, the automatic monitoring and control system is in real-time detection mode: the sensor 9 on the air supply pipe 31 detects various real-time parameters of the activated water and transmits the parameter data to the processor; the processor compares and analyzes the received data with the expected target to determine whether the current state has achieved the expected effect; when it is detected that the current state cannot meet the expected effect, the processor feeds back to the controller, which controls the high-voltage power supply 5 to adjust the voltage and controls the pressure value of the air pump 32, thereby adjusting the discharge voltage and air flow.

[0093] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A plasma-activated water preparation device, characterized in that, include: Water tank, with a containing cavity; An electrode assembly is located within the accommodating cavity and near the bottom of the water tank. The electrode assembly includes a sleeve with a discharge chamber and a discharge electrode that extends at least partially into the discharge chamber. Both the sleeve and the discharge electrode are located below the liquid level of the liquid-bearing area within the accommodating cavity. An air supply assembly, connected to the sleeve, is used to supply air into the discharge chamber of the sleeve. After the gas flows through the electrode assembly and generates a discharge, it can mix with the liquid in the water tank. The sleeve is a spiral tube, and the electrode segment on the discharge electrode located in the discharge cavity is spiral-shaped and extends along the central spiral line of the sleeve.

2. The plasma-activated water preparation apparatus according to claim 1, characterized in that, Also includes: The ground electrode is placed in the liquid inside the water tank, and both the discharge electrode and the ground electrode are electrically connected to a high-voltage power supply.

3. The plasma-activated water preparation apparatus according to claim 1, characterized in that, Along the spiral direction from bottom to top, the arc radius of the sleeve gradually increases.

4. The plasma-activated water preparation apparatus according to claim 1, characterized in that, The sleeve has an air inlet and an air outlet communicating with the discharge cavity, and the air supply assembly is communicating with the air inlet of the sleeve. The air outlet of the sleeve is higher than the air inlet of the sleeve and lower than the liquid level in the water tank.

5. The plasma-activated water preparation apparatus according to claim 1, characterized in that, The air delivery assembly includes: An air supply pipe, wherein the air inlet end of the air supply pipe is connected to the top of the water tank, and the air outlet end of the air supply pipe is connected to the discharge chamber of the sleeve. An air pump is installed on the air supply pipe to drive the gas in the water tank to enter from the air inlet end of the air supply pipe and then flow out from the air outlet end of the air supply pipe.

6. The plasma-activated water preparation apparatus according to claim 5, characterized in that, The gas delivery assembly also includes a valve disposed on the gas delivery pipe.

7. The plasma-activated water preparation apparatus according to any one of claims 1-6, characterized in that, The electrode assembly is configured as a plurality of electrodes, which are arranged at intervals on the inner bottom wall of the water tank; The sleeves of each electrode assembly are connected to the gas supply assembly.

8. The plasma-activated water preparation apparatus according to claim 7, characterized in that, Also includes: An airflow distribution assembly is installed on the bottom plate of the water tank, and the airflow distribution assembly has an airflow channel; the air supply assembly is connected to the discharge chamber of each sleeve through the airflow channel, and the gas from the air supply assembly is distributed through the airflow channel and then flows into the discharge chamber of each sleeve to inflate each sleeve.

9. The plasma-activated water preparation apparatus according to claim 8, characterized in that, The airflow channel has an airflow inlet and multiple airflow outlets; wherein... The airflow inlet is connected to the air outlet of the air delivery component; multiple airflow outlets are connected to multiple sleeves in a one-to-one correspondence.

10. The plasma-activated water preparation apparatus according to claim 7, characterized in that, Also includes: The electrode connection bar, the high-voltage power supply, and multiple discharge electrodes are all electrically connected to the electrode connection bar, and each discharge electrode is electrically connected to the high-voltage power supply through the electrode connection bar.

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