Plasma liquid activation device

Abstract

The present disclosure provides a kind of plasmonic liquid activation device, comprising: liquid cavity, including activation area and impact structure, impact structure is used to form liquid shock wave in activation area;And electric field generator, coupled with liquid cavity, for generating electric field in activation area, the frequency of electric field and the frequency of liquid shock wave resonance.

Description

Technical Field

[0001] This disclosure relates to the field of plasma processing technology, and in particular to a plasma liquid activation device. Background Technology

[0002] Plasma-activated liquids are liquids containing active ingredients produced by activating liquids with plasma. Plasma-activated liquids play a significant role in food safety, medicine, water treatment, agriculture, and healthcare. Traditional plasma-activated liquid generation devices employ static high-voltage needle tip discharge, dielectric barrier discharge, or other high-voltage ionization methods. These methods only partially ionize the gas-liquid interface of the liquid, then diffuse the active substance into the liquid to prepare the plasma-activated liquid. This method is inefficient, costly, and lacks practical applicability. Furthermore, the active substance generated using the gas-liquid interface is greatly affected by device parameters and the gas environment, resulting in poor repeatability and affecting production and experimental results. The water produced is usually not directly drinkable. For example, due to the presence of nitrogen and oxygen in the air, the pH of the plasma water is between 2 and 4, exhibiting weak acidity. Simultaneously, substances such as nitric acid may form in the water, which are detrimental to human health. Summary of the Invention

[0003] This disclosure provides a plasma liquid activation device, characterized in that it includes: a liquid chamber, comprising an activation zone and an impact structure, wherein the impact structure is used to generate a liquid shock wave within the activation zone;

[0004] An electric field generator, coupled to a liquid cavity, is used to generate an electric field in the activation region, the frequency of which resonates with the frequency of the liquid shock wave. Attached Figure Description

[0005] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0006] Figure 1 A schematic diagram of the structure of a plasma liquid activation apparatus according to some embodiments of the present disclosure is shown;

[0007] Figure 2 A schematic diagram of the structure of a plasma liquid activation apparatus according to other embodiments of the present disclosure is shown;

[0008] Figure 3 A schematic diagram of the structure of a plasma liquid activation apparatus according to other embodiments of the present disclosure is shown;

[0009] Figure 4 A schematic diagram of the structure of a plasma liquid activation apparatus according to other embodiments of the present disclosure is shown;

[0010] Figure 5 A schematic diagram of the structure of a plasma liquid activation apparatus according to other embodiments of the present disclosure is shown;

[0011] Figure 6 A schematic diagram showing the modulation frequency of a liquid shock wave according to some embodiments of the present disclosure is provided.

[0012] Figure 7 A schematic diagram illustrating the resonance of a liquid shock wave with an electric field frequency according to some embodiments of the present disclosure is shown.

[0013] Figure 8 This diagram illustrates the resonance of a liquid shock wave with an increased offset of the electric field frequency according to some embodiments of the present disclosure;

[0014] Figure 9 The following are spectral diagrams of the activated regions according to some embodiments of the present disclosure;

[0015] Figure 10 The ultraviolet spectra of the activated regions according to some embodiments of the present disclosure are shown;

[0016] Figure 11 The diagram shows the test results of plasma water sterilization generated by a plasma liquid activation device according to some embodiments of the present disclosure;

[0017] Figure 12 A linear relationship graph is shown between the placement time of plasma water and the sterilization effect according to some embodiments of the present disclosure.

[0018] In the above figures, the reference numerals represent:

[0019] 100, 200, 300, 400, 500 plasma liquid activation devices

[0020] 10, 210, 310, 410, 510 liquid chambers

[0021] Activation zones 11, 211, 311, 411, and 511

[0022] 12, 212, 312, 412, 512 impact structures

[0023] Through holes 121, 2122, 3121, and 4121

[0024] 122, 4122, 5122 tapered structure

[0025] 123, 4123 expansion structure

[0026] 5124 T-shaped structure

[0027] 2121 Rotary Drum

[0028] 2123 Shaft

[0029] 2124 Receiving cavity

[0030] 213, 313 upstream cavity

[0031] 214, 314 downstream cavity

[0032] 20, 220, 420, 520 electric field generators

[0033] 21, 221, 421, 521 First Electrode

[0034] 22, 222, 422, 522 second electrodes

[0035] 23, 223, 323, 423, 523 power supplies

[0036] 30, 230, 330 liquid pumps Detailed Implementation

[0037] Some embodiments of this disclosure will now be described with reference to the accompanying drawings. Obviously, the described embodiments are merely exemplary embodiments of this disclosure, and not all embodiments.

[0038] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this disclosure, it should be noted that unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "coupling" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two elements. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0039] Figure 1 A schematic diagram of the structure of a plasma liquid activation apparatus 100 according to some embodiments of the present disclosure is shown.

[0040] like Figure 1As shown, the plasma liquid activation device 100 may include a liquid chamber 10 and an electric field generator 20. The liquid chamber 10 may include an activation zone 11 and an impact structure 12, which can be used to generate a liquid shock wave within the activation zone 11. For example, when the liquid passes through the impact structure 12 with a certain kinetic energy, a liquid shock wave can be generated within the activation zone 11. The electric field generator 20 is coupled to the liquid chamber 10 and can be used to generate an electric field within the activation zone 11, the frequency of which resonates with the frequency of the liquid shock wave. In some embodiments of this disclosure, the plasma liquid activation device 100 preheats the liquid with shock waves, forming local hot spots inside the liquid. Then, the high-frequency electric field applied by the electric field generator 20 resonates and strengthens with the liquid shock wave to efficiently generate plasma liquid. In this disclosure, the liquid may include various suitable liquid substances, such as tap water, purified water, mineral water, saline solution, domestic sewage, milk, beverages, etc. Those skilled in the art will understand that the active regions (e.g., active regions 11, 211, 311, 411, 511) in the accompanying drawings of this disclosure are merely schematic and not intended to precisely identify the extent of the actual active regions. For example, in the accompanying drawings of this disclosure, for clarity, the active regions (e.g., active regions 11, 211, 311, 411, 511) are marked with a larger extent, exceeding the extent of the liquid cavities (e.g., liquid cavities 10, 210, 310, 410, 510), but in reality, the active regions (e.g., active regions 11, 211, 311, 411, 511) should be formed within the liquid cavities (e.g., liquid cavities 10, 210, 310, 410, 510).

[0041] In this disclosure, plasma is generated through the energy resonance of mechanical energy (hydraulic impact) and electric field energy to raise the temperature of matter (especially electrons). Vacuum plasma is the easiest to generate because electrons have a relatively long free path, and high-energy electrons that absorb energy can transfer energy between gas molecules to maintain the plasma combustion state; as gas density and pressure increase, the excitation and maintenance of plasma become increasingly difficult. In liquids, because the density of liquids is about three orders of magnitude higher than that of gases at normal pressure, the free path of electrons is very short (usually less than 1 nm), and high-energy electrons cannot achieve large-scale energy transfer. Therefore, it is very difficult to directly excite large-scale macroscopic plasmas in liquids. If only an electric field is used for excitation, the electric field strength must reach millions of volts per centimeter. Liquid shock waves are an energy application method that can generate a large number of local hot spots in liquids. Accompanied by the growth, expansion, compression, and bursting of cavitation bubbles, the local high temperatures generated in this process reach 1900-5000 K, producing a large number of local high-energy hot spots. By superimposing liquid shock waves and high-frequency alternating electric fields through resonance, it is more conducive to the collapse of the material structure, thereby generating plasma. When a liquid shock wave resonates with a high-frequency electric field, localized areas within the liquid accelerate and collapse, forming localized hotspots and gaining sufficient energy to generate plasma discharge. Simultaneously, under the induction of the electric field, channels form between plasma particles, creating a macroscopic liquid plasma discharge. The energy applied by the liquid shock wave and the energy of the electric field are both converted into liquid plasma excitation, thereby forming stable liquid plasma combustion. In this disclosure, resonance refers to the frequency or a multiple of the shock wave being equal to or close to the frequency or a multiple of the electric field.

[0042] The plasma liquid activation apparatus in the embodiments of this disclosure, such as plasma liquid activation apparatus 100-500, does not require the generation of gaseous plasma through a gas-liquid interface using external gas, followed by diffusion of the active material into the liquid. Instead, it directly generates plasma within a closed liquid chamber, such as liquid chamber 10, avoiding the influence of the external environment. This allows for the efficient, repeatable, and quantitative generation of plasma-activated liquids with a defined plasma active material. This production method also effectively extends the shelf life of the plasma-activated liquid, reduces storage costs, and facilitates widespread adoption. Furthermore, since the liquid is not directly ionized through a large local electric field on the metal electrodes, the required electric field strength and power density are significantly reduced. Additionally, the metal electrodes can maintain stable combustion without direct contact with the plasma discharge body, and keeping the metal electrodes away from the activation zone avoids electrode corrosion and metal ion pollution of the water.

[0043] In some embodiments of this disclosure, such as Figure 1As shown, the impact structure 12 may include a through hole 121 disposed within the liquid cavity 10. In some embodiments of this disclosure, the impact structure 12 includes a tapering structure 122 disposed before the through hole 121 and an expanding structure 123 disposed after the through hole 121. Figure 1 As shown, the tapered structure 122, the through hole 121, and the expansion structure 123 form an hourglass-shaped structure. Liquid enters from the tapered structure 122, passes through the through hole 121, generates a liquid shock wave, and then exits from the expansion structure 123 into the activation zone 11. Figure 1 As shown, the wall of the liquid cavity 10 can be hourglass-shaped to form the impact structure 12. The cross-section of the liquid cavity 10 can be any suitable shape, such as circular, elliptical, polygonal, etc.

[0044] In some embodiments of this disclosure, the plasma liquid activation device 100 may further include a liquid pump 30. The liquid pump 30 is connected to the liquid chamber 10 and is used to pump liquid into the liquid chamber 10. Furthermore, the liquid pump 30 can also adjust the liquid pressure. By providing pressure to the liquid, the liquid gains kinetic energy, thereby passing through the impact structure 12 and forming a high-frequency shock wave. This shock wave resonates with the high-frequency alternating electric field generated by the electric field generator 20, achieving stable plasma ionization. Additionally, the liquid often generates ultrasonic waves as it passes through the impact structure 12, further enhancing the energy within the activation zone 11 and facilitating the generation of plasma-activated liquid.

[0045] Those skilled in the art will understand that, although Figure 1 The shape of the impact structure 12 is shown in the figure, but this is only an example. The impact structure 12 can also be a Venturi tube, a water flow tube with built-in small holes, a cylindrical cavitation tube, or a disc cavitation tube, etc., which can generate shock waves in the liquid.

[0046] like Figure 1 As shown, in some embodiments of this disclosure, the electric field generator 20 may include a first electrode 21 and a second electrode 22. The first electrode 21 is disposed upstream or downstream of the impact structure 12, and the second electrode 22 is disposed downstream of the impact structure 12. For example, as Figure 1 As shown, the first electrode 21 can be disposed at the upstream end of the liquid cavity 10. Figure 1 The second electrode 22 can be disposed at the downstream end of the liquid cavity 10 (as shown on the left end). Figure 1 (As shown on the right end).

[0047] In some embodiments of this disclosure, the first electrode 21 may be disposed in the upstream space of the liquid cavity 10, upstream of the impact structure 12, and the second electrode 22 may be disposed in the downstream space of the liquid cavity 10, downstream of the impact structure 12.

[0048] In some embodiments of this disclosure, the first electrode 21 may be disposed on the outer wall of the liquid cavity 10, and the second electrode 22 may also be disposed on the outer wall of the liquid cavity 10, spaced apart from the first electrode. The first electrode 21 may be located upstream of the impact structure 12, and the second electrode 22 may be located downstream of the impact structure 12. Alternatively, both the first electrode 21 and the second electrode 22 may be located downstream of the impact structure 12, and within the activation region 11.

[0049] A high-frequency alternating electric field is applied in the activation zone 11 by the first electrode 21 and the second motor 22. Liquid activation is achieved through the energy resonance of liquid shock wave and high-frequency alternating electric field, resulting in plasma liquid.

[0050] Those skilled in the art will understand that, although Figure 1 The positions of the first electrode 21 and the second electrode 22 are shown in the figure, but this is only an example, and those skilled in the art can use other suitable settings.

[0051] like Figure 1 As shown, in some embodiments of this disclosure, the electric field generator 20 may further include a power supply 23 connected to the first electrode 21 and the second electrode 22, capable of generating an electric field. In some embodiments of this disclosure, the power supply 23 may also adjust the frequency of the electric field. Resonance can be achieved by adjusting the frequency of the electric field (e.g., adjusting the frequency of the power supply) or by adjusting the frequency of the liquid shock wave (e.g., adjusting the output pressure of the water pump). In some embodiments of this disclosure, the frequency of the power supply 23 may be 2kHz-200kHz. By adjusting the pressure of the water pump 30, the frequency of the liquid shock wave generated in the activation zone 11 can be modulated to be close to the power supply frequency or a multiple of the power supply frequency. Alternatively, the frequency of the electric field can be modulated to be close to the frequency of the liquid shock wave generated in the activation zone 11 or a multiple of the power supply frequency by adjusting the frequency of the power supply 23.

[0052] The plasma liquid activation device 100 in the embodiments of this disclosure is merely an exemplary structure. For example, Figure 2 A schematic diagram of the structure of a plasma liquid activation apparatus 200 according to other embodiments of the present disclosure is shown. For example... Figure 2 As shown, in some other embodiments of this disclosure, the impact structure 212 includes a rotating cylinder 2121 disposed within the activation zone 211 of the liquid chamber 210. The rotating cylinder 2121 includes a plurality of through holes 2122 disposed on its sidewall. Figure 2 As shown, the impact structure 212 also includes a rotating shaft 2123, which is connected to the rotating cylinder.

[0053] 2121 is fixedly connected to drive the rotating cylinder 2121 to rotate within the liquid chamber 210, thereby causing the liquid passing through the through hole 2122 of the rotating cylinder 2121 to form a shock wave. The plasma liquid activation device 200 may also include a drive device (not shown), such as a motor, for driving the rotating shaft 2123 to rotate.

[0054] like Figure 2 As shown, the impact structure 212 may further include a receiving cavity 2124 for accommodating the rotating cylinder 2121, and the liquid cavity 210 may further include an upstream cavity 213 located upstream of and communicating with the receiving cavity 2124, and a downstream cavity 214 located downstream of and communicating with the receiving cavity 2124. Figure 2 As shown, the cross-sectional dimensions of the upstream cavity 213 and the downstream cavity 214 are smaller than the cross-sectional dimensions of the receiving cavity 2124.

[0055] The plasma liquid activation device 200 also includes a liquid pump 230, which is connected to the liquid chamber 210. Under the pressure of the liquid pump 230, the liquid enters the receiving chamber 2124 through the upstream chamber 213 and generates a liquid shock wave under the action of the high-speed rotating drum 2121.

[0056] like Figure 2 As shown, the electric field generator 220 may include a first electrode 221 and a second electrode 222. The first electrode 221 is disposed upstream or downstream of the impact structure 212, and the second electrode 222 is disposed downstream of the impact structure 212. For example, as Figure 2 As shown, the first electrode 221 is disposed at the upstream end of the upstream cavity 213 (for example, as shown). Figure 2 The second electrode 222 is disposed at the downstream end of the downstream cavity 214 (as shown on the left end), and the second electrode 222 is disposed at the downstream end of the downstream cavity 214 (e.g., as shown on the left end). Figure 2 (As shown on the right end).

[0057] In some embodiments of this disclosure, the first electrode 221 may be disposed in the upstream space of the liquid cavity 210, upstream of the impact structure 212, and the second electrode 222 may be disposed in the downstream space of the liquid cavity 210, downstream of the impact structure 212.

[0058] In some embodiments of this disclosure, the first electrode 221 may be disposed on the outer wall of the liquid cavity 210, and the second electrode 222 may also be disposed on the outer wall of the liquid cavity 210, spaced apart from the first electrode. The first electrode 221 may be located upstream of the impact structure 212, and the second electrode 222 may be located downstream of the impact structure 212. Alternatively, both the first electrode 221 and the second electrode 222 may be located downstream of the impact structure 212, and within the activation region 211.

[0059] In some embodiments of this disclosure, such as Figure 2As shown, the electric field generator 220 may include a power supply 223 connected to the first electrode 221 and the second electrode 222, and is used to generate an electric field. In some embodiments of this disclosure, the power supply 223 can also adjust the frequency of the electric field. Resonance can be achieved by adjusting the frequency of the electric field (e.g., adjusting the frequency of the power supply) or adjusting the frequency of the liquid shock wave (e.g., adjusting the pressure of the water pump). In some embodiments of this disclosure, the frequency of the power supply 223 can be 2kHz-200kHz. By adjusting the pressure of the water pump 230 or the frequency of the power supply 223, the frequency or frequency multiple of the liquid shock wave generated in the activation region 211 can be made close to the frequency or frequency multiple of the electric field, thereby completing the preparation of the plasma liquid.

[0060] Figure 3 A schematic diagram of the structure of a plasma liquid activation apparatus 300 according to other embodiments of the present disclosure is shown. For example... Figure 3 As shown, the liquid cavity 310 can be cylindrical, and the impact structure 312 can include a through hole 3121 disposed in the liquid cavity 310, forming an activation zone 311 downstream of the through hole 3121. The liquid pump 330 is connected to the liquid cavity 310. The diameter of the through hole 3121 is much smaller than the diameter of the liquid cavity 310. When the liquid passes through the through hole 3121, the flow cross-section decreases sharply, and the liquid passes through the through hole 3121 under the pressure of the liquid pump 330, forming a liquid shock wave.

[0061] like Figure 3 As shown, the electric field generator 320 may include a first electrode 321 and a second electrode 322. The first electrode 321 is disposed upstream of the impact structure 312, and the second electrode 322 is disposed downstream of the impact structure 312.

[0062] In some embodiments of this disclosure, the first electrode 321 may be disposed in the upstream space of the liquid cavity 310, upstream of the impact structure 312, and the second electrode 322 may be disposed in the downstream space of the liquid cavity 310, downstream of the impact structure 312.

[0063] In some embodiments of this disclosure, the first electrode 321 may be disposed on the outer wall of the liquid cavity 310, and the second electrode 322 may also be disposed on the outer wall of the liquid cavity 310, spaced apart from the first electrode. The first electrode 321 may be located upstream of the impact structure 312, and the second electrode 322 may be located downstream of the impact structure 312. Alternatively, both the first electrode 321 and the second electrode 322 may be located downstream of the impact structure 312, and within the activation region 311.

[0064] In some embodiments of this disclosure, such as Figure 3As shown, the electric field generator 320 may further include a power supply 323 connected to the first electrode 321 and the second electrode 322, capable of generating an electric field. The power supply 323 can also adjust the frequency of the electric field. Resonance can be achieved by adjusting the frequency of the electric field (e.g., adjusting the frequency of the power supply) or by adjusting the frequency of the liquid shock wave (e.g., adjusting the output pressure of the water pump). In some embodiments of this disclosure, the frequency of the power supply 323 can be 2kHz-200kHz. By adjusting the pressure of the water pump 330, the frequency of the liquid shock wave generated in the activation zone 311 can be modulated to be close to the power supply frequency or a multiple thereof. Alternatively, the frequency of the electric field can be modulated to be close to the frequency of the liquid shock wave generated in the activation zone 311 or a multiple thereof by adjusting the frequency of the power supply 323.

[0065] Figure 4 A schematic diagram of the structure of a plasma liquid activation apparatus 400 according to other embodiments of the present disclosure is shown. For example... Figure 4 As shown, in some other embodiments of this disclosure, the impact structure 412 of the ionic liquid activation device 400 may include a through hole 4121 disposed within the liquid chamber 410. In some embodiments of this disclosure, the impact structure 412 may further include a tapering structure 4122 disposed before the through hole 4121 and an expanding structure 4123 disposed after the through hole 4121. Figure 4 As shown, the tapered structure 4122, the through hole 4121, and the expansion structure 4123 form an hourglass-shaped structure. Under the action of a liquid pump (not shown in the figure), the liquid enters from the tapered structure 4122, passes through the through hole 4121, generates a liquid shock wave, and then exits from the expansion structure 4123 into the activation zone 411.

[0066] like Figure 4 As shown, the electric field generator 420 may include a first electrode 421 and a second electrode 422. The first electrode 421 is disposed downstream of the impact structure 412 (e.g., downstream of the through hole 4121), and the second electrode 422 is also disposed downstream of the impact structure 412 and spaced apart from the first electrode 421. The first electrode 421 and the second electrode 422 are disposed on the outer wall of the liquid cavity 410, thereby generating an electric field within the activation region 411. In this embodiment, by providing pressure to the liquid, the liquid gains kinetic energy and passes through the impact structure 412, forming a high-frequency shock wave, which resonates with the high-frequency alternating electric field generated by the electric field generator 420, achieving stable plasma ionization. In addition, when the liquid passes through the impact structure 412, it is often accompanied by the formation of ultrasonic waves, which helps to enhance the energy within the activation region 411, facilitating the generation of plasma-activated liquid.

[0067] In other embodiments of this disclosure, such as Figure 4As shown, the electric field generator 420 may further include a power supply 423 connected to the first electrode 421 and the second electrode 422, capable of generating an electric field. The power supply 423 can also adjust the frequency of the electric field. Resonance can be achieved by adjusting the frequency of the electric field (e.g., adjusting the frequency of the power supply) or by adjusting the frequency of the liquid shock wave (e.g., adjusting the output pressure of the water pump). In some embodiments of this disclosure, the frequency of the power supply 423 can be 2kHz-200kHz. By adjusting the pressure of the water pump 430, the frequency of the liquid shock wave generated in the activation region 411 can be modulated to be close to the power supply frequency or a multiple thereof. Alternatively, the frequency of the electric field can be modulated to be close to the frequency of the liquid shock wave generated in the activation region 411 or a multiple thereof by adjusting the frequency of the power supply 423, thereby preparing a plasma liquid.

[0068] In some embodiments of this disclosure, for example, Figure 4 In the embodiment shown, the first electrode 421 and the second electrode 422 do not directly contact the water body. The electrodes are far away from the plasma discharge area, which avoids the problems of electrode corrosion and metal ion contamination of the liquid, ensuring the quality of the plasma liquid and thus ensuring the stability of the generated plasma liquid.

[0069] For example, Figure 5 A schematic diagram of the structure of an ionic liquid activation apparatus 500 according to other embodiments of the present disclosure is shown. Figure 5 As shown, in some other embodiments of this disclosure, the impact structure 512 of the ionic liquid activation device 500 includes a tapered structure 5122 and a T-shaped structure 5124 disposed downstream of the tapered structure 5122, with the T-shaped structure 5124 partially disposed within the activation zone 511. Liquid enters the T-shaped structure 5124 from the tapered structure 5122 under the action of a liquid pump (not shown), generating a liquid shock wave within the activation zone 511.

[0070] like Figure 5 As shown, the electric field generator 520 may include a first electrode 521 and a second electrode 522. The first electrode 521 and the second electrode 522 are disposed on the outer wall of the T-shaped structure 5124, facing each other and partially located within the activation region 511, thereby generating an electric field within the activation region 511. In this embodiment, by providing pressure to the liquid, the liquid gains kinetic energy, thereby passing through the impact structure 512 and forming a high-frequency shock wave. This shock wave resonates with the high-frequency alternating electric field generated by the electric field generator 520, achieving stable plasma ionization. Furthermore, the liquid often generates ultrasonic waves as it passes through the impact structure 512, further enhancing the energy within the activation region 511 and facilitating the generation of plasma-activated liquid.

[0071] In some embodiments of this disclosure, the power supply 523 can also adjust the frequency of the electric field. Resonance can be achieved by adjusting the frequency of the electric field (e.g., adjusting the frequency of the power supply) or the frequency of the liquid shock wave (e.g., adjusting the output pressure of the water pump). In some embodiments of this disclosure, the frequency of the power supply 523 can be 2kHz-200kHz. By adjusting the pressure of the water pump 530, the frequency of the liquid shock wave generated in the activation region 411 can be modulated to be close to the power supply frequency or a multiple thereof. Alternatively, the frequency of the electric field can be modulated to be close to the frequency of the liquid shock wave generated in the activation region 511 or a multiple thereof by adjusting the frequency of the power supply 523, thereby preparing the plasma liquid.

[0072] Figure 6 A schematic diagram of the modulation frequency of a liquid shock wave according to some embodiments of the present disclosure is shown. Figure 7 A schematic diagram illustrating the resonance of a liquid shock wave with an electric field frequency according to some embodiments of the present disclosure is shown. Figure 8 A schematic diagram illustrating the resonance of a liquid shock wave with an increase in electric field frequency offset according to some embodiments of the present disclosure is shown.

[0073] like Figures 6-8 As shown, the solid line represents the shock wave curve, and the dashed line represents the resonance wave curve. In some embodiments of this disclosure, when the plasma power supply applies an electric field to the activation region of the shock wave through the first and second electrodes, because the frequencies (or frequency multiples) of the two electrodes are similar, the mechanical energy and electric field energy experienced by the fluid will resonate and superimpose. Local areas in the water body will accelerate and collapse, forming local hot spots, thereby obtaining sufficient energy to form plasma discharge. Channels are formed between countless plasmas, forming a macroscopic liquid plasma discharge body. The energy applied by hydrodynamic drive and the electric field energy are both converted into liquid plasma excitation, forming a stable plasma-activated liquid.

[0074] Figure 9 The visible and near-infrared spectra of the activated regions according to some embodiments of the present disclosure are shown. Figure 10 The ultraviolet spectrum of the activated region according to some embodiments of the present disclosure is shown.

[0075] In some embodiments of this disclosure, the liquid may include purified water, tap water, mineral water, etc. Figure 9 and Figure 10 As shown, after the liquid passes through the impact structures (e.g., impact structure 12, impact structure 212, impact structure 312, impact structure 412, impact structure 512), the activating substance in the liquid cavity (e.g., liquid cavity 10, liquid cavity 210, liquid cavity 310, liquid cavity 410, liquid cavity 510) is hydrogen, a constituent element of water (composed of...). Figure 9 Characteristic peaks at 486 nm and 656 nm (represented by characteristic peaks at 656 nm) and oxygen (from Figure 9Characteristic peaks at 777.5 nm and 884.6 nm are indicated by these peaks, and OH radicals (such as...) are formed. Figure 10 The characteristic peaks at wavelengths of 309 nm and 283 nm indicate that, apart from water, virtually no other substances are activated, ensuring that the plasma water produced by the plasma liquid activation device 100 does not contain substances harmful to the human body (such as nitrates, metal ions, etc.).

[0076] In the embodiments of this disclosure, the liquid is not directly ionized through the localized large electric field of the metal electrode; the metal electrode does not need to directly contact the plasma discharge body to maintain a stable electric field. In conventional techniques, the maximum electric field strength is distributed near the electrode and decreases with the square of the distance from the electrode. However, in some embodiments of this disclosure, the electrodes (e.g., first electrode 21, first electrode 221, first electrode 321, first electrode 421, first electrode 521) and / or the second electrodes (e.g., second electrode 22, second electrode 222, second electrode 322, second electrode 422, second electrode 522) do not need to contact the plasma discharge region. A high-frequency alternating electric field is applied to the liquid shock wave activation region, and liquid plasma is achieved through energy resonance. The electrodes are far from the plasma discharge region, avoiding electrode corrosion and metal ion pollution of the water. Furthermore, the plasma is generated directly within the liquid, without relying on the gas-liquid interface formed by conventional external gases; therefore, the plasma water has no significant impact on the pH value.

[0077] In some embodiments of this disclosure, the first electrode (e.g., first electrode 21, first electrode 221, first electrode 321, first electrode 421, first electrode 521) and / or the second electrode (e.g., second electrode 22, second electrode 222, second electrode 322, second electrode 422, second electrode 522) may comprise a carbon nanofiber cluster electrode. In some embodiments of this disclosure, the carbon nanofiber cluster electrode can improve the electric field distribution and energy transfer efficiency, and also avoid electrolytic corrosion of metal electrodes and liquids, effectively expanding the application range.

[0078] Those skilled in the art will understand that, although in some embodiments of this disclosure the first electrode (e.g., first electrode 21, first electrode 221, first electrode 321, first electrode 421, first electrode 521) and / or the second electrode (e.g., second electrode 22, second electrode 222, second electrode 322, second electrode 422, second electrode 522) may include nanofiber cluster electrodes, this is merely exemplary, and the first electrode and / or the second electrode may also include at least one of graphite electrodes, stainless steel electrodes, copper electrodes, silver electrodes, gold electrodes, and chromium-nickel-iron alloy electrodes.

[0079] Figure 11The diagram shows the sterilization test results of plasma water produced by plasma liquid activation devices (e.g., plasma liquid activation devices 100, 200, 300, 400, 500) according to some embodiments of the present disclosure. For simplicity, the following description uses plasma liquid activation device 100 as an example. A sterilization test control experiment was conducted on the plasma water produced by the plasma liquid activation device 100 in some embodiments of the present disclosure, and the number of bacteria present in the liquid was estimated using the plate count method.

[0080] The bactericidal test includes an experimental group and a control group. The specific test steps are as follows:

[0081] Experimental group: Take 5 ml of bacterial suspension diluted 100 times, add it to 500 ml of water and stir for 1 min to obtain bacterial suspension dilution; connect tap water to ion liquid activation device 100, turn on the power to prepare plasma water; take 200 ml of plasma water, add the above 20 ml of bacterial suspension dilution, place on a magnetic stirrer and stir for 1 min to obtain a mixture; take an appropriate amount of the mixture and spread it on a petri dish, label it as small A0; after the mixture stands for 10 min, take an appropriate amount of the mixture and spread it on a petri dish, label it as small A1; after standing for 30 min, take an appropriate amount of the mixture and spread it on a petri dish, label it as small A2.

[0082] Control group: Take 200ml of tap water, add 20ml of the above diluent, stir on a magnetic stirrer for 1 minute, take an appropriate amount of liquid, spread it onto a petri dish, and label it as A00. After the predetermined time, the number of bacteria in each liquid is shown in Table 1, and the bacterial community status is shown in [Table 1]. Figure 10 .

[0083]

[0084] Table 1 Bacterial Count Record

[0085] As shown in Table 1 and Figure 11 As shown, in some embodiments of this disclosure, the plasma liquid (e.g., plasma water) generated by the plasma liquid activation device 100 has a good sterilization effect, and can achieve almost 100% sterilization after standing for half an hour.

[0086] Figure 12 A linear relationship graph is shown between the standing time of plasma water and its sterilization effect according to some embodiments of this disclosure. For example... Figure 12 As shown, in some embodiments of this disclosure, the plasma liquid (e.g., plasma water) generated by the plasma liquid activation device 100 has a sterilization rate of 100% when it is first produced, and after being placed for 50 days, the sterilization rate is still maintained at about 92%, and after being placed for 80 days, the sterilization rate is still maintained at about 80%. The sterilization rate is high and the stability is good.

[0087] It should be noted that the above are merely exemplary embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A plasma liquid activation device, characterized in that, include: A liquid cavity includes an activation zone and an impact structure, wherein the impact structure is used to generate a liquid shock wave within the activation zone; as well as An electric field generator, coupled to the liquid cavity, is used to generate an electric field within the activation region, the frequency of which resonates with the frequency of the liquid shock wave to generate a plasma liquid.

2. The plasma liquid activation device according to claim 1, characterized in that, The impact structure includes a through hole disposed within the liquid cavity.

3. The plasma liquid activation device according to claim 2, characterized in that, The impact structure includes a tapering structure disposed before the through hole and an expanding structure disposed after the through hole.

4. The plasma liquid activation device according to claim 1, characterized in that, The impact structure includes a rotating cylinder disposed within the activation zone of the liquid cavity, the rotating cylinder including a plurality of through holes disposed on the side wall.

5. The plasma liquid activation device according to claim 1, characterized in that, The impact structure includes a tapered structure and a T-shaped structure disposed downstream of the tapered structure.

6. The plasma liquid activation device according to claim 1, characterized in that, The electric field generator includes: A first electrode is disposed upstream or downstream of the impact structure; and The second electrode is located downstream of the impact structure.

7. The plasma liquid activation device according to claim 6, characterized in that, The first electrode is disposed at the upstream end of the liquid cavity, and the second electrode is disposed at the downstream end of the liquid cavity.

8. The plasma liquid activation device according to claim 1, characterized in that, The electric field generator includes: The first electrode is disposed on the outer wall of the liquid cavity; and The second electrode is disposed on the outer wall of the liquid cavity, spaced apart from the first electrode.

9. The plasma liquid activation device according to claim 6 or 8, characterized in that, The electric field generator also includes: A power source, connected to the first and second electrodes, is used to generate an electric field and adjust the frequency of the electric field.

10. The plasma liquid activation device according to claim 1, characterized in that, Also includes: A liquid pump, connected to the liquid chamber, is used to pump the liquid into the liquid chamber and regulate the liquid pressure.

11. The plasma liquid activation apparatus according to claim 6 or 8, characterized in that, The first electrode and / or the second electrode include at least one of the following: carbon nanofiber cluster electrode, graphite electrode, stainless steel electrode, copper electrode, silver electrode, gold electrode, and chromium-nickel-iron alloy electrode.

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