Dielectric barrier discharge device, disinfectant generator and disinfection device

Abstract

The utility model relates to a dielectric barrier discharge device, a disinfectant generator and a disinfection device.The dielectric barrier discharge device comprises a driving power source, parallel electrode plates, a first barrier medium and a second barrier medium, the two ends of the driving power source are connected with different electrode plates of the parallel electrode plates respectively, and the first barrier medium and the second barrier medium are arranged in an attached mode; and the electrode plates are arranged between the parallel electrode plates and are attached to the parallel electrode plates. The driving power supply outputs voltage to the parallel electrode plates, and the first barrier medium and the second barrier medium serve as barrier media between the parallel electrode plates, so that the parallel electrode plates generate different discharge products. By arranging the first barrier medium and the second barrier medium, the generation of different discharge products driven by a single power supply is realized, the plasma with a stronger sterilization effect can be generated by mixing the different discharge products, and the sterilization efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of disinfection technology, and in particular to a dielectric barrier discharge device, a disinfectant generator and a disinfection device. Background Art

[0002] Dielectric Barrier Discharge (DBD) is an effective way to generate plasma by ionizing gas at high voltage under atmospheric pressure. Its notable feature is that an insulating dielectric layer is placed in the discharge space to prevent the discharge from transforming into an arc, and it can only be driven by a changing voltage (such as pulsed DC, high-frequency AC). Compared with the corona discharge method, the dielectric barrier discharge method can generate a relatively large area of ​​low-temperature plasma under atmospheric pressure, which can be dissolved in an aqueous solution to generate plasma activated water (PAW) with sterilization and disinfection effects.

[0003] According to the power density and temperature of the discharge, dielectric barrier discharge usually has three discharge modes: ozone discharge mode, nitrogen oxide discharge mode and transition discharge mode. The product of the ozone discharge mode is mainly ozone, which has low dissolution efficiency in aqueous solution; the product of the nitrogen oxide discharge mode is low-valent nitrogen oxide, which has low sterilization activity; the transition discharge mode is very sensitive to power density and temperature and is difficult to control stably. Therefore, how to improve the sterilization efficiency of dielectric barrier discharge is still a problem to be solved. Utility Model Content

[0004] Based on this, it is necessary to provide a dielectric barrier discharge device, a disinfectant generator and a disinfection device that can increase the sterilization efficiency in response to the above technical problems.

[0005] In a first aspect, the present application provides a dielectric barrier discharge device, comprising a driving power supply, parallel electrode plates, a first blocking medium and a second blocking medium, wherein two ends of the driving power supply are respectively connected to different plates of the parallel electrode plates, and the first blocking medium and the second blocking medium are arranged in close contact with each other and are both arranged between the parallel electrode plates and in close contact with the parallel electrode plates;

[0006] The driving power supply outputs a voltage to the parallel electrode plates, and the first blocking medium and the second blocking medium serve as blocking mediums between the parallel electrode plates, so that the parallel electrode plates generate different discharge products.

[0007] In one embodiment, the first blocking medium and the second blocking medium are blocking mediums made of different materials.

[0008] In one embodiment, the parallel electrode plate includes a power electrode and a discharge electrode, the output end of the driving power supply is connected to the power electrode, the input end of the driving power supply is connected to the discharge electrode, and the first blocking medium and the second blocking medium are both arranged between the power electrode and the discharge electrode, and are arranged in close contact with the power electrode and the discharge electrode.

[0009] In one embodiment, the first barrier medium and the second barrier medium have different thicknesses between the power electrode and the discharge electrode.

[0010] In one embodiment, the discharge electrode includes a first discharge region electrode and a second discharge region electrode, the first discharge region electrode is attached to the first blocking medium, and the second discharge region electrode is attached to the second blocking medium.

[0011] In one of the embodiments, an insulating enclosure is further provided on a side of the discharge electrode away from the power electrode, and the insulating enclosure is used to gather discharge products generated by the discharge electrode.

[0012] In one embodiment, the first blocking medium includes a first material blocking medium and a second material blocking medium, the first material blocking medium is bonded to the second blocking medium, the power electrode and the second material blocking medium, and the second material blocking medium is bonded to the second blocking medium, the discharge electrode and the first material blocking medium.

[0013] In one embodiment, the discharge electrode is a grid structure electrode.

[0014] In one embodiment, the first blocking medium includes a first region blocking medium and a second region blocking medium, the first region blocking medium and the second region blocking medium are both arranged in contact with the parallel electrode plates, and the second blocking medium is arranged between the first region blocking medium and the second region blocking medium.

[0015] In one embodiment, the first blocking medium is provided with a through hole, and the second blocking medium is embedded in the first blocking medium through the through hole.

[0016] In one embodiment, the first blocking medium and the second blocking medium are bonded together by insulating resin.

[0017] In one of the embodiments, the sum of the projection areas of the first blocking medium and the second blocking medium in a parallel direction is greater than the projection area of ​​the parallel electrode plates in the parallel direction; the parallel direction is the extension direction of the parallel electrode plates.

[0018] In a second aspect, the present application also provides a disinfectant generator, which includes a water tank and a dielectric barrier discharge device as described in the above embodiments, wherein the dielectric barrier discharge device is arranged in the water tank; the discharge product generated by the dielectric barrier discharge device is dissolved in the aqueous solution in the water tank to prepare the disinfectant.

[0019] In a third aspect, the present application further provides a disinfection device, which includes a controller and a disinfectant generator as described in the above embodiment, wherein the controller is connected to the disinfectant generator for controlling the disinfectant generator.

[0020] The above-mentioned dielectric barrier discharge device, disinfectant generator and disinfection device include a driving power supply, parallel electrode plates, a first blocking medium and a second blocking medium. The two ends of the driving power supply are respectively connected to different plates of the parallel electrode plates. The first blocking medium and the second blocking medium are arranged in a close relationship and are both arranged between the parallel electrode plates and are arranged in a close relationship with the parallel electrode plates. The driving power supply outputs voltage to the parallel electrode plates. The first blocking medium and the second blocking medium serve as blocking media between the parallel electrode plates, so that the parallel electrode plates generate different discharge products. By setting the first blocking medium and the second blocking medium, the generation of different discharge products driven by a single power supply is realized. The mixing of different discharge products can generate plasma with a stronger sterilization effect, thereby improving the sterilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a structural block diagram of a dielectric barrier discharge device in one embodiment;

[0023] Figure 2 is a structural block diagram of a dielectric barrier discharge device in another embodiment;

[0024] Figure 3 is a schematic structural diagram of a discharge electrode in one embodiment;

[0025] Figure 4 A schematic diagram of the structure of a dielectric barrier discharge device in one embodiment;

[0026] Figure 5 is a schematic structural diagram of a dielectric barrier discharge device in another embodiment;

[0027] Figure 6A schematic structural diagram of a dielectric barrier discharge device in yet another embodiment;

[0028] Figure 7 A schematic diagram of the structure of a dielectric barrier discharge device in another embodiment;

[0029] Figure 8 is a structural diagram of a dielectric barrier discharge device in one embodiment;

[0030] Fig. 9 is a schematic diagram of the structure of a blocking medium in one embodiment;

[0031] Fig.10 is a structural diagram of a dielectric barrier discharge device in another embodiment;

[0032] Fig.11 FIG. 4 is a structural diagram of a dielectric barrier discharge device in yet another embodiment.

[0033] Explanation of the accompanying drawings: driving power supply 200, parallel electrode plate 400, first blocking medium 600, second blocking medium 800, power electrode 420, discharge electrode 440, first discharge area electrode 442, second discharge area electrode 444, insulating enclosure 900, first area blocking medium 620, second area blocking medium 640, insulating resin 608. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0036] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0037] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0039] The discharge mode of dielectric barrier discharge can generate plasma at atmospheric pressure, also known as gaseous active particles. The plasma is dissolved in water and reacted with aqueous solution to generate plasma-activated water with bactericidal and disinfecting effects, which has a large number of applications in environmental protection, sterilization and disinfection, and preservation of fruits and vegetables. Among them, the dielectric barrier discharge mode can be in different discharge modes and produce different discharge products according to the power density injected into the discharge reactor and the temperature of the discharge interval. There are three discharge modes in total: ozone discharge mode, nitrogen oxide discharge mode and transition discharge mode: the first is that when the power density and temperature are low, it is in the ozone discharge mode, and the discharge product is mainly ozone. The second is that when the power density and temperature are high, it is in the nitrogen oxide discharge mode, and the discharge product is mainly low-valent nitrogen oxides, such as NO and NO2. The third is that in the conversion process of the above two discharge modes, there is a transitional mixed discharge mode, called the transition discharge mode, and its discharge product is a high-valent nitrogen oxide generated after the mixed reaction of ozone and low-valent nitrogen oxides, such as NO3 and N2O5.

[0040] Among the products of the above-mentioned discharge modes, the dissolution efficiency of ozone is low, and the sterilization activity of plasma-activated water generated by the dissolution of low-valent nitrogen oxides is low. Therefore, neither the ozone discharge mode nor the nitrogen oxide discharge mode can efficiently prepare plasma-activated water. The transition discharge mode can produce a large amount of high-valent nitrogen oxides that are effective in sterilization and highly soluble, but the transition discharge mode is very sensitive to power density and temperature, and it is difficult to accurately control the dielectric barrier discharge to be in the transition discharge mode for a long time. Therefore, the three discharge modes have their own advantages and disadvantages, but it is difficult to achieve efficient generation of plasma-activated water, and therefore it is difficult to achieve efficient sterilization.

[0041] To this end, the present application provides a dielectric barrier discharge device. In one embodiment, the dielectric barrier discharge device is as follows: Figure 1As shown, it includes a driving power supply 200, a parallel electrode plate 400, a first blocking medium 600 and a second blocking medium 800, the two ends of the driving power supply 200 are respectively connected to different plates of the parallel electrode plate 400, the first blocking medium 600 and the second blocking medium 800 are arranged in affixed manner, and are both arranged between the parallel electrode plates 400, and are arranged in affixed manner with the parallel electrode plates 400. Specifically, the parallel electrode plate 400 has two parallelly arranged plates, and the first blocking medium 600 and the second blocking medium 800 are both used as blocking media and are arranged between different plates of the parallel electrode plate 400. Exemplarily, if the first blocking medium 600 and the second blocking medium 800 are both rectangular parallelepipeds, the side on which the first blocking medium 600 and the second blocking medium 800 are bonded together is marked as the connection side, then the side adjacent to the connection side is connected to the first electrode plate of the parallel electrode plate 400, and the side opposite to the side connected to the first electrode plate is connected to the second electrode plate of the parallel electrode plate 400; the side on which the second blocking medium 800 and the first blocking medium 600 are bonded together is marked as the connection side, then the side adjacent to the connection side is connected to the first electrode plate of the parallel electrode plate 400, and the side opposite to the side connected to the first electrode plate is connected to the second electrode plate of the parallel electrode plate 400.

[0042] The driving power supply 200 outputs a voltage to the parallel electrode plate 400, and the different plates of the parallel electrode plate 400 and the blocking medium between the parallel electrode plates 400 together with the driving power supply 200 form a circuit loop. When the voltage output by the driving power supply 200 is transmitted to the parallel electrode plate 400, the first blocking medium 600 and the second blocking medium 800 act as blocking media between the parallel electrode plates 400, so that the parallel electrode plates 400 generate different discharge products. Specifically, the two plates of the parallel electrode plate 400 discharge through the blocking medium, and the discharge products are generated on the plate close to the negative electrode side of the driving power supply 200. Since the blocking medium includes the first blocking medium 600 and the second blocking medium 800, the blocking mediums are different, resulting in differences in the power density and temperature of the parallel electrode plate 400 during discharge, so the plate area connected to the first blocking medium 600 and the plate area connected to the second blocking medium 800 can be in different discharge modes, thereby generating different discharge products.

[0043] Furthermore, the first blocking medium 600 and the second blocking medium 800 are arranged in a close relationship to form a whole blocking medium. Since the voltage output by the driving power supply 200 in the blocking medium discharge device is usually large, when the spacing between the plates in the parallel electrode plate 400 is small, air breakdown may occur. In order to avoid air breakdown as much as possible, there should be no air gap between the first blocking medium 600 and the second blocking medium 800. Therefore, the blocking medium that is in a close relationship is arranged between the two plates of the parallel electrode plate 400, so as to avoid the voltage of the parallel electrode plate 400 from breaking down or short-circuiting along the air gap.

[0044] Optionally, the shapes of the first blocking medium 600 and the second blocking medium 800 can be a combination of any shapes such as rectangle, circle, square, etc., as long as the contact surfaces of the first blocking medium 600 and the second blocking medium 800 can fit together. The plane that fits between the first blocking medium 600 and the second blocking medium 800 can be an irregular plane, such as an arc surface, an undulating plane that fits each other. Similarly, the overall blocking medium and the parallel electrode plate 400 are also fitted together, that is, one of the plates of the parallel electrode plate 400, the overall blocking medium and the other plate of the parallel electrode plate 400 are closely fitted to avoid air gaps, which is conducive to the blocking medium to generate discharge products more efficiently during the discharge process.

[0045] To control the generated discharge products to be different, the plate area connected to the first blocking medium 600 and the plate area connected to the second blocking medium 800 need to be in different discharge modes. The main influencing parameters of the discharge mode are power density and temperature, which are affected by the material and thickness of the blocking medium. Specifically, when other conditions remain unchanged, the use of blocking media with different relative dielectric constants or blocking media with different thicknesses will lead to changes in the above-mentioned main influencing parameters, and the blocking medium discharge device can be controlled to be in different discharge modes. Therefore, the difference between the first blocking medium 600 and the second blocking medium 800 is that the material is different or the thickness is different.

[0046] In one embodiment, the first blocking dielectric 600 and the second blocking dielectric 800 are blocking dielectrics of different materials. Furthermore, the first blocking dielectric 600 and the second blocking dielectric 800 are blocking dielectrics of different relative dielectric constants. The relative dielectric constant is a physical parameter that characterizes the dielectric properties or polarization properties of a dielectric material, and its value is equal to the ratio of the capacitance of a capacitor of the same size made of a dielectric material as a medium to that of a capacitor of the same size made of a vacuum as a medium, and this value is also a characterization of the material's ability to store electricity. Under the same material thickness, the greater the relative dielectric constant of the dielectric material, the lower the starting voltage required for the dielectric barrier discharge device, and the higher the heat generated during the discharge process, thereby changing the power density and temperature, so that the dielectric barrier discharge device is easier to transition from the ozone discharge mode to the nitrogen oxide discharge mode.

[0047] Exemplarily, the first blocking medium 600 and the second blocking medium 800 may be made of insulating materials with different relative dielectric constants, such as inorganic insulating materials such as quartz glass, alumina ceramics, and zirconia ceramics, or organic insulating materials such as polytetrafluoroethylene (PTFE), silicone rubber, and polyimide (PI).

[0048] The dielectric barrier discharge device comprises a driving power supply 200, parallel electrode plates 400, a first blocking medium 600 and a second blocking medium 800. The two ends of the driving power supply 200 are respectively connected to different plates of the parallel electrode plates 400. The first blocking medium 600 and the second blocking medium 800 are arranged in close contact with each other and are both arranged between the parallel electrode plates 400 and in close contact with the parallel electrode plates 400. The driving power supply 200 outputs voltage to the parallel electrode plates 400. The first blocking medium 600 and the second blocking medium 800 serve as blocking media between the parallel electrode plates 400, so that the parallel electrode plates 400 generate different discharge products. By setting the first blocking medium 600 and the second blocking medium 800, the generation of different discharge products driven by a single power supply is realized. The mixing of different discharge products can generate plasma with a stronger sterilization effect, thereby improving the sterilization efficiency.

[0049] In one embodiment, if Figure 2 As shown, the parallel electrode plate 400 includes a power electrode 420 and a discharge electrode 440, the output end of the driving power supply 200 is connected to the power electrode 420, the input end of the driving power supply 200 is connected to the discharge electrode 440, and the first blocking medium 600 and the second blocking medium 800 are both arranged between the power electrode 420 and the discharge electrode 440, and are arranged in close contact with the power electrode 420 and the discharge electrode 440.

[0050] The arrangement relationship of the first barrier medium 600, the second barrier medium 800, the power electrode 420 and the discharge electrode 440 may be as follows: the first barrier medium 600 and the second barrier medium 800 are arranged in abutment with each other. If the first barrier medium 600 and the second barrier medium 800 are both cuboids, the side where the first barrier medium 600 and the second barrier medium 800 are arranged in abutment with each other is marked as the connection side, then the side adjacent to the connection side is connected to the power electrode 420, and the side opposite to the side connected to the power electrode 420 is connected to the discharge electrode 440; the side where the second barrier medium 800 and the first barrier medium 600 are arranged in abutment with each other is marked as the connection side, then the side adjacent to the connection side is connected to the power electrode 420, and the side opposite to the side connected to the power electrode 420 is connected to the discharge electrode 440.

[0051] Specifically, the output end of the driving power supply 200 is equivalent to the positive electrode of the battery, and the input end of the driving power supply 200 is equivalent to the negative electrode of the battery, then the power electrode 420 is connected to the output end of the driving power supply 200, and the discharge electrode 440 is connected to the input end of the driving power supply 200. When the driving power supply 200 applies a voltage to the parallel electrode plate 400, the discharge electrode 440 of the parallel electrode plate 400 is used to generate a discharge product. The blocking medium between the power electrode 420 and the discharge electrode 440 is a first blocking medium 600 and a second blocking medium 800, and the discharge electrode 440 generates different discharge products according to different blocking media.

[0052] Optionally, the power electrode 420 may be a conductive metal sheet such as stainless steel or copper, and the power electrode 420 and the discharge electrode 440 may be plates of any shape, such as a rectangle, a circle, etc. Further, a layer of conductive metal may be plated on the surface of the power electrode 420 that is in contact with the barrier medium by electroplating or other processes. Optionally, the conductive metal may also be plated on the surface of the barrier medium, including the first barrier medium 600 and the second barrier medium 800.

[0053] In order to improve the discharge product generation efficiency of the discharge electrode 440, the structure of the discharge electrode 440 may be designed. In one embodiment, the discharge electrode 440 is a grid structure electrode.

[0054] Specifically, the grid structure is also called a mesh structure. The top view of the discharge electrode 440 is as follows: Figure 3 As shown, in Figure 1-2 The discharge electrodes 440 are shown in side view or cross-sectional view. Figure 3 As described above, the discharge electrode 440 is composed of a plurality of metal materials arranged in a grid shape, and the metal material can be a corrosion-resistant metal material such as stainless steel and titanium. The mesh size and spacing of the discharge electrode 440 can be designed according to requirements, including but not limited to the cross-sectional shape, cross-sectional size, length, arrangement spacing, etc. of the metal material. The arrangement angle between the metal material arranged horizontally and the metal material arranged vertically can be selected according to the use requirements, such as Figure 3 The arrangement angle shown is 90°, and the formed grid is a regular quadrilateral. If the arrangement angle is adjusted to other angles, the formed grid is a parallelogram. At the same time, the shape of the formed grid can also be adjusted by adjusting the spacing between the metal materials arranged horizontally or the spacing between the metal materials arranged vertically.

[0055] In this embodiment, by setting the discharge electrode 440 to a mesh structure and using the mesh structure electrode for discharge, the contact area between the discharge electrode 440 and the air can be increased, which is beneficial to improving the efficiency of generating discharge products and thus improving the disinfection efficiency.

[0056] For example, taking the first blocking medium 600 and the second blocking medium 800 as blocking mediums of different materials, the structure of the dielectric barrier discharge device can be as follows: Figure 4As shown, the driving power supply 200 is a high-voltage power supply, the power electrode 420 is a metal sheet, the discharge electrode 440 is a metal grid with a grid structure, the first blocking medium 600 is an alumina ceramic material, and the second blocking medium 800 is a zirconia ceramic material. The thickness of the alumina ceramic material and the zirconia ceramic material are both 1mm. When the high-voltage power supply applies a 7kHz AC high voltage through the metal sheet, when the peak-to-peak value of the input voltage reaches 3kV, the air around the metal grid connected below the zirconia ceramic material is first ionized and broken down, and is in an ozone discharge mode. At this time, the metal grid connected below the alumina ceramic material does not discharge. As the voltage continues to increase, the metal grid area connected below the alumina ceramic material begins to discharge. When the peak-to-peak value of the input voltage reaches 5kV, the metal grid area connected below the zirconia ceramic material is in a stable nitrogen oxide discharge mode; the metal grid area connected below the alumina ceramic material is in a stable ozone discharge mode. The discharge products (gaseous active particles) generated by the two different discharge modes can be in situ compounded in the discharge area to generate high-valent nitrogen oxides (such as N2O5, etc.) with stronger bactericidal effects.

[0057] When the material of the barrier medium is the same, the thickness of the barrier medium will also affect the starting discharge voltage of the dielectric barrier discharge device. When the thickness is larger, the discharge is more difficult. Therefore, in one embodiment, if Figure 5 As shown, the thicknesses of the first blocking medium 600 and the second blocking medium 800 are different between the power electrode 420 and the discharge electrode 440 .

[0058] Specifically, by setting the thickness of the first blocking dielectric 600 and the second blocking dielectric 800 to different values, the discharge difference between the discharge area where the first blocking dielectric 600 is located and the discharge area where the second blocking dielectric 800 is located can be increased. By adjusting the thickness values ​​of the first blocking dielectric 600 and the second blocking dielectric 800, the two areas can be controlled to be in different discharge modes, thereby generating different discharge products, thereby achieving different discharge modes in different discharge areas in a dielectric barrier discharge device.

[0059] Optionally, the first blocking medium 600 and the second blocking medium 800 have different thicknesses. In this case, the materials of the first blocking medium 600 and the second blocking medium 800 can be the same or different, which is not limited in this embodiment. The thickness difference between the first blocking medium 600 and the second blocking medium 800 should not exceed 2 mm, and the thickness of the first blocking medium 600 and the second blocking medium 800 should not exceed 3 mm.

[0060] In one embodiment, if Figure 5As shown, the discharge electrode 440 includes a first discharge region electrode 442 and a second discharge region electrode 444 . The first discharge region electrode 442 is attached to the first blocking medium 600 , and the second discharge region electrode 444 is attached to the second blocking medium 800 .

[0061] Specifically, when the thicknesses of the first barrier medium 600 and the second barrier medium 800 are different, since the power electrode 420 and the discharge electrode 440 still need to be arranged in affixed with the first barrier medium 600 and the second barrier medium 800, the discharge electrode 440 is split into a first discharge region electrode 442 and a second discharge region electrode 444, the first discharge region electrode 442 is arranged in affixed with the first barrier medium 600, and the second discharge region electrode 444 is arranged in affixed with the second barrier medium 800. The first discharge region electrode 442 and the second discharge region electrode 444 are connected correspondingly. For example, when the discharge electrode 440 is a grid structure electrode, the grid structure of the first discharge region electrode 442 is connected correspondingly to the grid structure of the second discharge region electrode 444. At the junction of the regions, the grid structure is extended in affixed with the barrier medium to achieve the connection of each discharge region.

[0062] In one embodiment, if Figure 6 As shown, an insulating enclosure 900 is further provided on a side of the discharge electrode 440 away from the power electrode 420 , and the insulating enclosure 900 is used to gather the discharge products generated by the discharge electrode 440 .

[0063] Specifically, the dielectric barrier discharge device further includes an insulating enclosure 900, which is disposed on the side of the discharge electrode 440 away from the power electrode 420, specifically, on the edge region of the plate of the discharge electrode 440. The insulating enclosure 900 is made of an insulating material, and can gather the discharge products generated by the discharge electrode 440 in the enclosure. When the dielectric barrier discharge device works in an open space, the discharge products can be gathered by winding the insulating enclosure 900 around the edge region of the discharge electrode 440, so as to promote the efficient mixing and reaction of the discharge products in the two discharge modes in situ.

[0064] Optionally, the insulating enclosure 900 is not set in a unique manner. For example, the insulating enclosure 900 can be set perpendicular to the extension direction of the discharge electrode 440, or it can be set at a certain inclination angle to the extension direction of the discharge electrode 440. The height of the insulating enclosure 900 during the winding process can be uniform or variable.

[0065] The shape of the insulating enclosure 900 is matched with the shape of the discharge electrode 440 to fully aggregate the discharge products. For example, when the electrode plate of the discharge electrode 440 is circular, the insulating enclosure 900 is wound in a circular shape; when the electrode plate of the discharge electrode 440 is rectangular, the insulating enclosure 900 is wound in a rectangular shape.

[0066] It should be noted that the first blocking medium 600 and the second blocking medium 800 are respectively used to generate different discharge products, and the means of achieving different discharge products is not limited to using blocking mediums of different materials or different thicknesses for the first blocking medium 600 and the second blocking medium 800, and can also be achieved by other means. In one embodiment, the first blocking medium 600 may include blocking mediums of different materials, wherein the first blocking medium 600 includes a first material blocking medium and a second material blocking medium, the first material blocking medium is arranged in affixed with the second blocking medium 800, the power electrode 420, and the second material blocking medium, and the second material blocking medium is arranged in affixed with the second blocking medium 800, the discharge electrode 440, and the first material blocking medium.

[0067] Specifically, the first material barrier medium and the second material barrier medium are barrier mediums of different materials, wherein the material of one of the first material barrier medium and the second material barrier medium may be the same as the material of the second barrier medium 800, or the material of both the first material barrier medium and the second material barrier medium may be different from the material of the second barrier medium 800. The first material barrier medium and the second material barrier medium are stacked and bonded between the parallel electrode plates 400 to form the first barrier medium 600, and are bonded to the two electrodes of the parallel electrode plates 400. The first material barrier medium is bonded to the power electrode 420 of the parallel electrode plate 400, and the second material barrier medium is bonded to the discharge electrode 440 of the parallel electrode plate 400. In practical applications, the material and / or thickness of the first material barrier medium and the second material barrier medium in the first barrier medium 600 can be adjusted to further adjust the relative dielectric constant of the first barrier medium 600, and control the areas of the discharge electrode 440 corresponding to the first barrier medium 600 and the second barrier medium 800 to produce different discharge products.

[0068] Furthermore, the first blocking medium 600 may also include a third material blocking medium. It is understandable that the first blocking medium 600 may include blocking mediums of various materials. The types and numbers of blocking mediums of different materials may be determined according to actual needs. The first blocking medium 600 is stacked and arranged to be in different discharge modes with the second blocking medium 800, generating different discharge products. In this embodiment, there is no restriction on the material, type, number, arrangement order, and shape specifications of the blocking mediums of various materials constituting the first blocking medium 600. Correspondingly, the second blocking medium 800 may also be composed of blocking mediums of various materials, which is similar to the description of the first blocking medium 600 above, and will not be repeated here.

[0069] The connection relationship between the second blocking medium 800 and the first blocking medium 600 can be sequential connection or interlocking connection. Taking the blocking mediums as having the same material but different thicknesses, and the discharge electrode 440 including the first discharge region electrode 442 and the second discharge region electrode 444 as an example, in one embodiment, as Figure 7 As shown, the first blocking medium 600 includes a first region blocking medium 620 and a second region blocking medium 640 , both of which are arranged in contact with the parallel electrode plates 400 , and the second blocking medium 800 is arranged between the first region blocking medium 620 and the second region blocking medium 640 .

[0070] Specifically, the first region blocking medium 620 is connected to the second region blocking medium 640 through the second blocking medium 800, which is equivalent to the first region blocking medium 600 being separated by the second blocking medium 800 and divided into the first region blocking medium 620 and the second region blocking medium 640. The first region blocking medium 620 and the second region blocking medium 640 have the same material and thickness.

[0071] The discharge electrode 440 corresponding to the first region blocking dielectric 620 and the second region blocking dielectric 640 is the first discharge region electrode 442, and the discharge electrode 440 corresponding to the second blocking dielectric 800 is the second discharge region electrode 444. During the discharge process, the discharge products generated in the discharge electrode 440 regions corresponding to the first region blocking dielectric 620 and the second region blocking dielectric 640 are the same.

[0072] In one embodiment, the first blocking medium 600 and the second blocking medium 800 are connected in a chimeric manner. Figure 8 As shown, the first blocking medium 600 is provided with a through hole, and the second blocking medium 800 is embedded in the first blocking medium 600 through the through hole.

[0073] Specifically, the first blocking medium 600 may be roughly rectangular, cylindrical, or irregular in shape. A through hole is provided in the first blocking medium 600, and the through hole is in the direction of the two-electrode plate connecting the parallel electrode plate 400. The second blocking medium 800 is filled in the through hole so that the second blocking medium 800 can connect the two-electrode plate of the parallel electrode plate 400 through the through hole structure, that is, the power electrode 420 can connect the discharge electrode 440 through the second blocking medium 800 to complete the discharge.

[0074] When the first blocking medium 600 and the second blocking medium 800 are made of different materials and have the same thickness, the first blocking medium 600 can also form an integral blocking medium with the second blocking medium 800 by opening a through hole, such as Figure 4 and Figure 6As shown. Optionally, the shape of the through hole is not limited, and can be a round hole, a square hole, or an irregular hole. Correspondingly, the shape of the second blocking medium 800 matches the through hole, so as to achieve a close fit with the first blocking medium 600 and prevent the generation of air gaps.

[0075] Furthermore, in order to ensure the fit between the first blocking medium 600 and the second blocking medium 800 , in one embodiment, the first blocking medium 600 and the second blocking medium 800 are fitted together by an insulating resin 608 .

[0076] The first blocking medium 600 and the second blocking medium 800 constitute an integral blocking medium. Fig. 9 As shown, an insulating resin 608 is disposed on the surface where the first blocking medium 600 and the second blocking medium 800 are bonded, and the first blocking medium 600 is connected to the second blocking medium 800 through the insulating resin 608. Correspondingly, when the first blocking medium 600 includes the first region blocking medium 620 and the second region blocking medium 640, the insulating resin 608 can also be disposed on the bonding surface between the first region blocking medium 620 and the second blocking medium 800, and the bonding surface between the second region blocking medium 640 and the second blocking medium 800.

[0077] Since there must be no air gap at the connection between the first blocking medium 600 and the second blocking medium 800, otherwise the high voltage of the power electrode 420 will be connected to the discharge electrode 440 along the air gap and cause a short circuit, an insulating resin 608 is set on the bonding surface of the first blocking medium 600 and the second blocking medium 800. The setting method is: apply a thin layer of high-voltage resistant epoxy resin to the bonding surface, and then wait for the epoxy to cure at room temperature or high temperature, and use the resin curing to achieve a sealed connection.

[0078] In one embodiment, the sum of the projection areas of the first blocking medium 600 and the second blocking medium 800 in the parallel direction is greater than the projection area of ​​the parallel electrode plate 400 in the parallel direction; the parallel direction is the extension direction of the parallel electrode plate 400 .

[0079] Specifically, the extension direction of the parallel electrode plate 400 refers to the extension direction of the electrode plate, that is, the direction in which the electrode plate is expanded when the area of ​​the electrode plate is expanded. In order to prevent the power electrode 420 and the discharge from being equally spaced through the edge and causing a creepage short circuit, the first blocking medium 600 and the second blocking medium 800 should protrude from the edge of the parallel electrode plate 400, that is, the sum of the projected areas of the first blocking medium 600 and the second blocking medium 800 in the parallel direction should be greater than the sum of the projected areas of the parallel electrode plate 400 in the parallel direction. Exemplarily, the overall blocking medium composed of the first blocking medium 600 and the second blocking medium 800 protrudes from the edge of the parallel electrode plate 400 by more than 5 mm.

[0080] In this embodiment, the entire barrier dielectric protrudes from the edge of the parallel electrode plate 400 to prevent the parallel electrode plate 400 from experiencing a creepage short circuit phenomenon, thereby increasing the reliability of the dielectric barrier discharge device.

[0081] In order to better understand the above solution, a detailed explanation is given below in conjunction with a specific embodiment. In one embodiment, the materials and thicknesses of the first blocking dielectric 600 and the second blocking dielectric 800 in the dielectric barrier discharge device can be different. Fig.10 and Fig.11 As shown, the dielectric barrier discharge device includes a first barrier dielectric 600, a second barrier dielectric 800, a driving power source 200, a power electrode 420, a first discharge region electrode 442, a second discharge region electrode 444, an insulating enclosure 900 and an insulating resin 608 (not shown in the figure), wherein the first barrier dielectric 600 includes a first region barrier dielectric 620 and a second region barrier dielectric 640. The arrangement and connection relationship between the various structures have been described above and will not be repeated here.

[0082] In this embodiment, by using barrier dielectrics of different materials and thicknesses, the upper limit voltage value of the stable ozone mode discharge area is increased, and the lower limit voltage value of the stable nitrogen oxide mode discharge area is reduced, so that the working voltage range of the dielectric barrier discharge device under dual-mode discharge is wider and the tolerance to voltage fluctuations is higher.

[0083] Based on the same technical concept, the present application also provides a disinfectant generator, which includes a water tank and a dielectric barrier discharge device as described in the above embodiments, and the dielectric barrier discharge device is arranged in the water tank. Among them, different discharge products generated by the dielectric barrier discharge device are first mixed, and high-valent nitrogen oxides with stronger bactericidal effect are generated after mixing, and then the high-valent nitrogen oxides are dissolved in the aqueous solution in the water tank to prepare a disinfectant with better bactericidal effect.

[0084] In one embodiment, a dielectric barrier discharge device such as Figure 1As shown, it includes a driving power supply 200, a parallel electrode plate 400, a first blocking medium 600 and a second blocking medium 800, the two ends of the driving power supply 200 are respectively connected to different plates of the parallel electrode plate 400, the first blocking medium 600 and the second blocking medium 800 are arranged in affixed manner, and are both arranged between the parallel electrode plates 400, and are arranged in affixed manner with the parallel electrode plates 400. Specifically, the parallel electrode plate 400 has two parallelly arranged plates, and the first blocking medium 600 and the second blocking medium 800 are both used as blocking media and are arranged between different plates of the parallel electrode plate 400. Exemplarily, if the first blocking medium 600 and the second blocking medium 800 are both rectangular parallelepipeds, the side on which the first blocking medium 600 and the second blocking medium 800 are bonded together is marked as the connection side, then the side adjacent to the connection side is connected to the first electrode plate of the parallel electrode plate 400, and the side opposite to the side connected to the first electrode plate is connected to the second electrode plate of the parallel electrode plate 400; the side on which the second blocking medium 800 and the first blocking medium 600 are bonded together is marked as the connection side, then the side adjacent to the connection side is connected to the first electrode plate of the parallel electrode plate 400, and the side opposite to the side connected to the first electrode plate is connected to the second electrode plate of the parallel electrode plate 400.

[0085] The driving power supply 200 outputs a voltage to the parallel electrode plate 400, and the different plates of the parallel electrode plate 400 and the blocking medium between the parallel electrode plates 400 together with the driving power supply 200 form a circuit loop. When the voltage output by the driving power supply 200 is transmitted to the parallel electrode plate 400, the first blocking medium 600 and the second blocking medium 800 act as blocking media between the parallel electrode plates 400, so that the parallel electrode plates 400 generate different discharge products. Specifically, the two plates of the parallel electrode plate 400 discharge through the blocking medium, and the discharge products are generated on the plate close to the negative electrode side of the driving power supply 200. Since the blocking medium includes the first blocking medium 600 and the second blocking medium 800, the blocking mediums are different, resulting in differences in the power density and temperature of the parallel electrode plate 400 during discharge, so the plate area connected to the first blocking medium 600 and the plate area connected to the second blocking medium 800 can be in different discharge modes, thereby generating different discharge products.

[0086] Furthermore, the first blocking medium 600 and the second blocking medium 800 are arranged in a close relationship to form a whole blocking medium. Since the voltage output by the driving power supply 200 in the blocking medium discharge device is usually large, when the spacing between the plates in the parallel electrode plate 400 is small, air breakdown may occur. In order to avoid air breakdown as much as possible, there should be no air gap between the first blocking medium 600 and the second blocking medium 800. Therefore, the blocking medium that is in a close relationship is arranged between the two plates of the parallel electrode plate 400, so as to avoid the voltage of the parallel electrode plate 400 from breaking down or short-circuiting along the air gap.

[0087] Optionally, the shapes of the first blocking medium 600 and the second blocking medium 800 can be a combination of any shapes such as rectangle, circle, square, etc., as long as the contact surfaces of the first blocking medium 600 and the second blocking medium 800 can fit together. The plane that fits between the first blocking medium 600 and the second blocking medium 800 can be an irregular plane, such as an arc surface, an undulating plane that fits each other. Similarly, the overall blocking medium and the parallel electrode plate 400 are also fitted together, that is, one of the plates of the parallel electrode plate 400, the overall blocking medium and the other plate of the parallel electrode plate 400 are closely fitted to avoid air gaps, which is conducive to the blocking medium to generate discharge products more efficiently during the discharge process.

[0088] To control the generated discharge products to be different, the plate area connected to the first blocking medium 600 and the plate area connected to the second blocking medium 800 need to be in different discharge modes. The main influencing parameters of the discharge mode are power density and temperature, which are affected by the material and thickness of the blocking medium. Specifically, when other conditions remain unchanged, the use of blocking media with different relative dielectric constants or blocking media with different thicknesses will lead to changes in the above-mentioned main influencing parameters, and the blocking medium discharge device can be controlled to be in different discharge modes. Therefore, the difference between the first blocking medium 600 and the second blocking medium 800 is that the material is different or the thickness is different.

[0089] In one embodiment, the first blocking dielectric 600 and the second blocking dielectric 800 are blocking dielectrics of different materials. Furthermore, the first blocking dielectric 600 and the second blocking dielectric 800 are blocking dielectrics of different relative dielectric constants. The relative dielectric constant is a physical parameter that characterizes the dielectric properties or polarization properties of a dielectric material, and its value is equal to the ratio of the capacitance of a capacitor of the same size made of a dielectric material as a medium to that of a capacitor of the same size made of a vacuum as a medium, and this value is also a characterization of the material's ability to store electricity. Under the same material thickness, the greater the relative dielectric constant of the dielectric material, the lower the starting voltage required for the dielectric barrier discharge device, and the higher the heat generated during the discharge process, thereby changing the power density and temperature, so that the dielectric barrier discharge device is easier to transition from the ozone discharge mode to the nitrogen oxide discharge mode.

[0090] Exemplarily, the first blocking medium 600 and the second blocking medium 800 may be made of insulating materials with different relative dielectric constants, such as inorganic insulating materials such as quartz glass, alumina ceramics, and zirconia ceramics, or organic insulating materials such as polytetrafluoroethylene (PTFE), silicone rubber, and polyimide (PI).

[0091] In one embodiment, if Figure 2As shown, the parallel electrode plate 400 includes a power electrode 420 and a discharge electrode 440, the output end of the driving power supply 200 is connected to the power electrode 420, the input end of the driving power supply 200 is connected to the discharge electrode 440, and the first blocking medium 600 and the second blocking medium 800 are both arranged between the power electrode 420 and the discharge electrode 440, and are arranged in close contact with the power electrode 420 and the discharge electrode 440.

[0092] The arrangement relationship of the first barrier medium 600, the second barrier medium 800, the power electrode 420 and the discharge electrode 440 may be as follows: the first barrier medium 600 and the second barrier medium 800 are arranged in abutment with each other. If the first barrier medium 600 and the second barrier medium 800 are both cuboids, the side where the first barrier medium 600 and the second barrier medium 800 are arranged in abutment with each other is marked as the connection side, then the side adjacent to the connection side is connected to the power electrode 420, and the side opposite to the side connected to the power electrode 420 is connected to the discharge electrode 440; the side where the second barrier medium 800 and the first barrier medium 600 are arranged in abutment with each other is marked as the connection side, then the side adjacent to the connection side is connected to the power electrode 420, and the side opposite to the side connected to the power electrode 420 is connected to the discharge electrode 440.

[0093] Specifically, the output end of the driving power supply 200 is equivalent to the positive electrode of the battery, and the input end of the driving power supply 200 is equivalent to the negative electrode of the battery, then the power electrode 420 is connected to the output end of the driving power supply 200, and the discharge electrode 440 is connected to the input end of the driving power supply 200. When the driving power supply 200 applies a voltage to the parallel electrode plate 400, the discharge electrode 440 of the parallel electrode plate 400 is used to generate a discharge product. The blocking medium between the power electrode 420 and the discharge electrode 440 is a first blocking medium 600 and a second blocking medium 800, and the discharge electrode 440 generates different discharge products according to different blocking media.

[0094] Optionally, the power electrode 420 may be a conductive metal sheet such as stainless steel or copper, and the power electrode 420 and the discharge electrode 440 may be plates of any shape, such as a rectangle, a circle, etc. Further, a layer of conductive metal may be plated on the surface of the power electrode 420 that is in contact with the barrier medium by electroplating or other processes. Optionally, the conductive metal may also be plated on the surface of the barrier medium, including the first barrier medium 600 and the second barrier medium 800.

[0095] In order to improve the discharge product generation efficiency of the discharge electrode 440, the structure of the discharge electrode 440 may be designed. In one embodiment, the discharge electrode 440 is a grid structure electrode.

[0096] Specifically, the grid structure is also called a mesh structure. The top view of the discharge electrode 440 is as follows: Figure 3 As shown, in Figure 1-2The discharge electrodes 440 are shown in side view or cross-sectional view. Figure 3 As described above, the discharge electrode 440 is composed of a plurality of metal materials arranged in a grid shape, and the metal material can be a corrosion-resistant metal material such as stainless steel and titanium. The mesh size and spacing of the discharge electrode 440 can be designed according to requirements, including but not limited to the cross-sectional shape, cross-sectional size, length, arrangement spacing, etc. of the metal material. The arrangement angle between the metal material arranged horizontally and the metal material arranged vertically can be selected according to the use requirements, such as Figure 3 The arrangement angle shown is 90°, and the formed grid is a regular quadrilateral. If the arrangement angle is adjusted to other angles, the formed grid is a parallelogram. At the same time, the shape of the formed grid can also be adjusted by adjusting the spacing between the metal materials arranged horizontally or the spacing between the metal materials arranged vertically.

[0097] For example, taking the first blocking medium 600 and the second blocking medium 800 as blocking mediums of different materials, the structure of the dielectric barrier discharge device can be as follows: Figure 4 As shown, the driving power supply 200 is a high-voltage power supply, the power electrode 420 is a metal sheet, the discharge electrode 440 is a metal grid with a grid structure, the first blocking medium 600 is an alumina ceramic material, and the second blocking medium 800 is a zirconia ceramic material. The thickness of the alumina ceramic material and the zirconia ceramic material are both 1 mm. When the high-voltage power supply applies a 7kHz AC high voltage through the metal sheet, when the peak value of the input voltage reaches 3kV, the air around the metal grid connected below the zirconia ceramic material is first ionized and broken down, and is in an ozone discharge mode. At this time, the metal grid connected below the alumina ceramic material does not discharge. As the voltage continues to increase, the metal grid area connected below the alumina ceramic material begins to discharge. When the peak-to-peak value of the input voltage reaches 5kV, the metal grid area connected below the zirconia ceramic material is in a stable nitrogen oxide discharge mode; the metal grid area connected below the alumina ceramic material is in a stable ozone discharge mode. The discharge products (gaseous active particles) generated by the two different discharge modes can be in-situ compounded in the discharge area to generate high-valent nitrogen oxides (such as N2O5, etc.) with stronger bactericidal effects.

[0098] When the material of the barrier medium is the same, the thickness of the barrier medium will also affect the starting discharge voltage of the dielectric barrier discharge device. When the thickness is larger, the discharge is more difficult. Therefore, in one embodiment, if Figure 5 As shown, the thicknesses of the first blocking medium 600 and the second blocking medium 800 are different between the power electrode 420 and the discharge electrode 440 .

[0099] Specifically, by setting the thickness of the first blocking dielectric 600 and the second blocking dielectric 800 to different values, the discharge difference between the discharge area where the first blocking dielectric 600 is located and the discharge area where the second blocking dielectric 800 is located can be increased. By adjusting the thickness values ​​of the first blocking dielectric 600 and the second blocking dielectric 800, the two areas can be controlled to be in different discharge modes, thereby generating different discharge products, thereby achieving different discharge modes in different discharge areas in a dielectric barrier discharge device.

[0100] Optionally, the first blocking medium 600 and the second blocking medium 800 have different thicknesses. In this case, the materials of the first blocking medium 600 and the second blocking medium 800 can be the same or different, which is not limited in this embodiment. The thickness difference between the first blocking medium 600 and the second blocking medium 800 should not exceed 2 mm, and the thickness of the first blocking medium 600 and the second blocking medium 800 should not exceed 3 mm.

[0101] In one embodiment, if Figure 5 As shown, the discharge electrode 440 includes a first discharge region electrode 442 and a second discharge region electrode 444 . The first discharge region electrode 442 is attached to the first blocking medium 600 , and the second discharge region electrode 444 is attached to the second blocking medium 800 .

[0102] Specifically, when the thicknesses of the first barrier medium 600 and the second barrier medium 800 are different, since the power electrode 420 and the discharge electrode 440 still need to be arranged in affixed with the first barrier medium 600 and the second barrier medium 800, the discharge electrode 440 is split into a first discharge region electrode 442 and a second discharge region electrode 444, the first discharge region electrode 442 is arranged in affixed with the first barrier medium 600, and the second discharge region electrode 444 is arranged in affixed with the second barrier medium 800. The first discharge region electrode 442 and the second discharge region electrode 444 are connected correspondingly. For example, when the discharge electrode 440 is a grid structure electrode, the grid structure of the first discharge region electrode 442 is connected correspondingly to the grid structure of the second discharge region electrode 444. At the junction of the regions, the grid structure is extended in affixed with the barrier medium to achieve the connection of each discharge region.

[0103] In one embodiment, if Figure 6 As shown, an insulating enclosure 900 is further provided on a side of the discharge electrode 440 away from the power electrode 420 , and the insulating enclosure 900 is used to gather the discharge products generated by the discharge electrode 440 .

[0104] Specifically, the dielectric barrier discharge device further includes an insulating enclosure 900, which is disposed on the side of the discharge electrode 440 away from the power electrode 420, specifically, on the edge region of the plate of the discharge electrode 440. The insulating enclosure 900 is made of an insulating material, and can gather the discharge products generated by the discharge electrode 440 in the enclosure. When the dielectric barrier discharge device works in an open space, the discharge products can be gathered by winding the insulating enclosure 900 around the edge region of the discharge electrode 440, so as to promote the efficient mixing and reaction of the discharge products in the two discharge modes in situ.

[0105] Optionally, the insulating enclosure 900 is not set in a unique manner. For example, the insulating enclosure 900 can be set perpendicular to the extension direction of the discharge electrode 440, or it can be set at a certain inclination angle to the extension direction of the discharge electrode 440. The height of the insulating enclosure 900 during the winding process can be uniform or variable.

[0106] The shape of the insulating enclosure 900 is matched with the shape of the discharge electrode 440 to fully aggregate the discharge products. For example, when the electrode plate of the discharge electrode 440 is circular, the insulating enclosure 900 is wound in a circular shape; when the electrode plate of the discharge electrode 440 is rectangular, the insulating enclosure 900 is wound in a rectangular shape.

[0107] It should be noted that the first blocking medium 600 and the second blocking medium 800 are respectively used to generate different discharge products, and the means of achieving different discharge products is not limited to using blocking mediums of different materials or different thicknesses for the first blocking medium 600 and the second blocking medium 800, and can also be achieved by other means. In one embodiment, the first blocking medium 600 may include blocking mediums of different materials, wherein the first blocking medium 600 includes a first material blocking medium and a second material blocking medium, the first material blocking medium is arranged in affixed with the second blocking medium 800, the power electrode 420, and the second material blocking medium, and the second material blocking medium is arranged in affixed with the second blocking medium 800, the discharge electrode 440, and the first material blocking medium.

[0108] Specifically, the first material barrier medium and the second material barrier medium are barrier mediums of different materials, wherein the material of one of the first material barrier medium and the second material barrier medium may be the same as the material of the second barrier medium 800, or the material of both the first material barrier medium and the second material barrier medium may be different from the material of the second barrier medium 800. The first material barrier medium and the second material barrier medium are stacked and bonded between the parallel electrode plates 400 to form the first barrier medium 600, and are bonded to the two electrodes of the parallel electrode plates 400. The first material barrier medium is bonded to the power electrode 420 of the parallel electrode plate 400, and the second material barrier medium is bonded to the discharge electrode 440 of the parallel electrode plate 400. In practical applications, the material and / or thickness of the first material barrier medium and the second material barrier medium in the first barrier medium 600 can be adjusted to further adjust the relative dielectric constant of the first barrier medium 600, and control the areas of the discharge electrode 440 corresponding to the first barrier medium 600 and the second barrier medium 800 to produce different discharge products.

[0109] Furthermore, the first blocking medium 600 may also include a third material blocking medium. It is understandable that the first blocking medium 600 may include blocking mediums of various materials. The types and numbers of blocking mediums of different materials may be determined according to actual needs. The first blocking medium 600 is stacked and arranged to be in different discharge modes with the second blocking medium 800, generating different discharge products. In this embodiment, there is no restriction on the material, type, number, arrangement order, and shape specifications of the blocking mediums of various materials constituting the first blocking medium 600. Correspondingly, the second blocking medium 800 may also be composed of blocking mediums of various materials, which is similar to the description of the first blocking medium 600 above, and will not be repeated here.

[0110] The connection relationship between the second blocking medium 800 and the first blocking medium 600 can be sequential connection or interlocking connection. Taking the blocking mediums as having the same material but different thicknesses, and the discharge electrode 440 including the first discharge region electrode 442 and the second discharge region electrode 444 as an example, in one embodiment, as Figure 7 As shown, the first blocking medium 600 includes a first region blocking medium 620 and a second region blocking medium 640 , both of which are arranged in contact with the parallel electrode plates 400 , and the second blocking medium 800 is arranged between the first region blocking medium 620 and the second region blocking medium 640 .

[0111] Specifically, the first region blocking medium 620 is connected to the second region blocking medium 640 through the second blocking medium 800, which is equivalent to the first region blocking medium 600 being separated by the second blocking medium 800 and divided into the first region blocking medium 620 and the second region blocking medium 640. The first region blocking medium 620 and the second region blocking medium 640 have the same material and thickness.

[0112] The discharge electrode 440 corresponding to the first region blocking dielectric 620 and the second region blocking dielectric 640 is the first discharge region electrode 442, and the discharge electrode 440 corresponding to the second blocking dielectric 800 is the second discharge region electrode 444. During the discharge process, the discharge products generated in the discharge electrode 440 regions corresponding to the first region blocking dielectric 620 and the second region blocking dielectric 640 are the same.

[0113] In one embodiment, the first blocking medium 600 and the second blocking medium 800 are connected in a chimeric manner. Figure 8 As shown, the first blocking medium 600 is provided with a through hole, and the second blocking medium 800 is embedded in the first blocking medium 600 through the through hole.

[0114] Specifically, the first blocking medium 600 may be roughly rectangular, cylindrical, or irregular in shape. A through hole is provided in the first blocking medium 600, and the through hole is in the direction of the two-electrode plate connecting the parallel electrode plate 400. The second blocking medium 800 is filled in the through hole so that the second blocking medium 800 can connect the two-electrode plate of the parallel electrode plate 400 through the through hole structure, that is, the power electrode 420 can connect the discharge electrode 440 through the second blocking medium 800 to complete the discharge.

[0115] When the first blocking medium 600 and the second blocking medium 800 are made of different materials and have the same thickness, the first blocking medium 600 can also form an integral blocking medium with the second blocking medium 800 by opening a through hole, such as Figure 4 and Figure 6 As shown. Optionally, the shape of the through hole is not limited, and can be a round hole, a square hole, or an irregular hole. Correspondingly, the shape of the second blocking medium 800 matches the through hole, so as to achieve a close fit with the first blocking medium 600 and prevent the generation of air gaps.

[0116] Furthermore, in order to ensure the fit between the first blocking medium 600 and the second blocking medium 800 , in one embodiment, the first blocking medium 600 and the second blocking medium 800 are fitted together by an insulating resin 608 .

[0117] The first blocking medium 600 and the second blocking medium 800 constitute an integral blocking medium. Fig. 9As shown, an insulating resin 608 is disposed on the surface where the first blocking medium 600 and the second blocking medium 800 are bonded, and the first blocking medium 600 is connected to the second blocking medium 800 through the insulating resin 608. Correspondingly, when the first blocking medium 600 includes the first region blocking medium 620 and the second region blocking medium 640, the insulating resin 608 can also be disposed on the bonding surface between the first region blocking medium 620 and the second blocking medium 800, and the bonding surface between the second region blocking medium 640 and the second blocking medium 800.

[0118] Since there must be no air gap at the connection between the first blocking medium 600 and the second blocking medium 800, otherwise the high voltage of the power electrode 420 will be connected to the discharge electrode 440 along the air gap and cause a short circuit, an insulating resin 608 is set on the bonding surface of the first blocking medium 600 and the second blocking medium 800. The setting method is: apply a thin layer of high-voltage resistant epoxy resin to the bonding surface, and then wait for the epoxy to cure at room temperature or high temperature, and use the resin curing to achieve a sealed connection.

[0119] In one embodiment, the sum of the projection areas of the first blocking medium 600 and the second blocking medium 800 in the parallel direction is greater than the projection area of ​​the parallel electrode plate 400 in the parallel direction; the parallel direction is the extension direction of the parallel electrode plate 400 .

[0120] Specifically, the extension direction of the parallel electrode plate 400 refers to the extension direction of the electrode plate, that is, the direction in which the electrode plate is expanded when the area of ​​the electrode plate is expanded. In order to prevent the power electrode 420 and the discharge from being equally spaced through the edge and causing a creepage short circuit, the first blocking medium 600 and the second blocking medium 800 should protrude from the edge of the parallel electrode plate 400, that is, the sum of the projected areas of the first blocking medium 600 and the second blocking medium 800 in the parallel direction should be greater than the sum of the projected areas of the parallel electrode plate 400 in the parallel direction. Exemplarily, the overall blocking medium composed of the first blocking medium 600 and the second blocking medium 800 protrudes from the edge of the parallel electrode plate 400 by more than 5 mm.

[0121] In one embodiment, the present application further provides a disinfection device, which includes a controller and a disinfectant generator as described in the above embodiments, wherein the controller is connected to the disinfectant generator and is used to control the disinfectant generator. A communication vessel is provided between the water tank of the disinfectant generator and the dielectric barrier discharge device, and when the communication vessel is closed, the dielectric barrier discharge device is isolated from the water tank. The controller is connected to the communication vessel and can control the closing and opening of the communication vessel, thereby realizing the control of the disinfectant generator.

[0122] In one embodiment, the disinfection device may further include a disinfection box, and the disinfectant generator is disposed in the inner cavity of the disinfection box. Furthermore, the water tank in the disinfectant generator may be connected to the atomizer via a water valve, and the opening and closing of the water valve may control whether the atomizer is connected to the water tank. The water valve is also connected to a controller, and the opening and closing of the water valve is controlled by the controller. The controller may not only control the preparation of the disinfectant in the disinfectant generator, but also control whether the disinfectant is sprayed on the inner cavity of the disinfection box, thereby controlling whether the disinfection device performs disinfection.

[0123] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0124] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A dielectric barrier discharge device, characterized in that: It comprises a driving power source, parallel electrode plates, a first blocking medium and a second blocking medium, wherein two ends of the driving power source are respectively connected to different electrode plates of the parallel electrode plates, and the first blocking medium and the second blocking medium are arranged in close contact with each other and are both arranged between the parallel electrode plates and in close contact with the parallel electrode plates; The driving power supply outputs a voltage to the parallel electrode plates, and the first blocking medium and the second blocking medium serve as blocking mediums between the parallel electrode plates, so that the parallel electrode plates generate different discharge products.

2. The dielectric barrier discharge device according to claim 1, characterized in that: The first blocking medium and the second blocking medium are blocking mediums made of different materials.

3. The dielectric barrier discharge device according to claim 1, characterized in that: The parallel electrode plate includes a power electrode and a discharge electrode, the output end of the driving power supply is connected to the power electrode, the input end of the driving power supply is connected to the discharge electrode, and the first blocking medium and the second blocking medium are both arranged between the power electrode and the discharge electrode, and are arranged in close contact with the power electrode and the discharge electrode.

4. The dielectric barrier discharge device according to claim 3, characterized in that: The first barrier medium and the second barrier medium have different thicknesses between the power electrode and the discharge electrode.

5. The dielectric barrier discharge device according to claim 4, characterized in that: The discharge electrode includes a first discharge region electrode and a second discharge region electrode. The first discharge region electrode is attached to the first blocking medium, and the second discharge region electrode is attached to the second blocking medium.

6. The dielectric barrier discharge device according to claim 3, characterized in that: An insulating enclosure is also provided on a side of the discharge electrode away from the power electrode, and the insulating enclosure is used to gather discharge products generated by the discharge electrode.

7. The dielectric barrier discharge device according to claim 3, characterized in that: The first blocking medium includes a first material blocking medium and a second material blocking medium. The first material blocking medium is bonded to the second blocking medium, the power electrode and the second material blocking medium. The second material blocking medium is bonded to the second blocking medium, the discharge electrode and the first material blocking medium.

8. The dielectric barrier discharge device according to any one of claims 3 to 7, characterized in that: The discharge electrode is a grid structure electrode.

9. The dielectric barrier discharge device according to claim 1, characterized in that: The first blocking medium includes a first region blocking medium and a second region blocking medium. Both the first region blocking medium and the second region blocking medium are arranged in contact with the parallel electrode plates. The second blocking medium is arranged between the first region blocking medium and the second region blocking medium.

10. The dielectric barrier discharge device according to claim 1, characterized in that: The first blocking medium is provided with a through hole, and the second blocking medium is embedded in the first blocking medium through the through hole.

11. The dielectric barrier discharge device according to claim 1, characterized in that: The first blocking medium and the second blocking medium are bonded together by insulating resin.

12. The dielectric barrier discharge device according to claim 1, characterized in that: The sum of the projection areas of the first blocking medium and the second blocking medium in a parallel direction is greater than the projection area of ​​the parallel electrode plates in the parallel direction; the parallel direction is an extension direction of the parallel electrode plates.

13. A disinfectant generator, characterized in that: The disinfectant generator comprises a water tank and a dielectric barrier discharge device as described in any one of claims 1 to 12, wherein the dielectric barrier discharge device is arranged in the water tank; the discharge product generated by the dielectric barrier discharge device is dissolved in the aqueous solution in the water tank to prepare the disinfectant.

14. A disinfection device, characterized in that: The disinfection device comprises a controller and the disinfectant generator as claimed in claim 13, wherein the controller is connected to the disinfectant generator and is used to control the disinfectant generator.

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