Dielectric barrier discharge device and air handling apparatus

Abstract

A dielectric barrier discharge device, comprising: a dielectric barrier discharge assembly, comprising a first electrode (1), a second electrode (2), and a barrier dielectric (3) separating the first electrode (1) from the second electrode (2), wherein the barrier dielectric (3) is cylindrical, the internal space of the barrier dielectric (3) forms a discharge space, and the barrier dielectric (3) is configured to be of a segmented structure comprising a plurality of sub-dielectric segments (31); and a power supply module (4), electrically connected to the first electrode (1) and the second electrode (2) and configured to load a voltage on the first electrode (1) and the second electrode (2), so that the dielectric barrier discharge assembly undergoes dielectric barrier discharge in the discharge space.

Description

Dielectric barrier discharge device and air treatment equipment

[0001] The present application claims priority from the Chinese Patent Application No. 202410448399.3 filed on April 15, 2024 and entitled "Dielectric barrier discharge device and air treatment equipment", the contents of which should be understood as incorporated herein by reference. TECHNICAL FIELD

[0002] The present document relates to, but is not limited to, the field of air purification technology, and in particular to a dielectric barrier discharge device and air treatment equipment. BACKGROUND

[0003] At present, the discharge structure of a coaxial cylindrical dielectric barrier discharge (DBD) device is that an insulating tube is used as a barrier medium, an internal electrode is placed inside the insulating tube, an external electrode is arranged outside the insulating tube, and a gap inside the insulating tube between the internal electrode and the external electrode forms a high-voltage discharge area to generate various active factors, which can purify the air to be purified by removing bacteria and odor.

[0004] For an air treatment area larger application scenario such as a cabinet, in order to obtain a better decontamination effect, the discharge area of the DBD discharge structure is increased, that is, a longer insulating tube is selected, so that the active substances such as bacteria-removing factors generated by ionized air are concentrated in the tube and are difficult to diffuse to the outside of the tube, which is not conducive to improving the decontamination effect.

[0005] SUMMARY

[0006] The following is a summary of the subject matter of the detailed description herein. This summary is not intended to limit the scope of the claims.

[0007] The dielectric barrier discharge device provided by the embodiment of the present disclosure comprises: a dielectric barrier discharge assembly comprising a first electrode, a second electrode, and a barrier medium separating the first electrode and the second electrode, the barrier medium being in a cylindrical shape, an internal space of the barrier medium forming a discharge space, and the barrier medium being arranged in a segmented structure comprising a plurality of sub-medium segments; and a power supply module electrically connected to the first electrode and the second electrode, arranged to load a voltage on the first electrode and the second electrode, so that the dielectric barrier discharge assembly generates dielectric barrier discharge in the discharge space.

[0008] The embodiment of the present disclosure further provides an air treatment equipment comprising the dielectric barrier discharge device as described in the above embodiment.

[0009] Other aspects can become apparent after reading and understanding the drawings and detailed description.

[0010] SUMMARY

[0011] Fig. 1 is a structural schematic diagram of a dielectric barrier discharge device provided by some embodiments of the present disclosure.

[0012] In the drawings, the components represented by the reference numbers are listed as follows:

[0013] 1 first electrode, 2 second electrode, 21 sub-electrode segment, 3 barrier medium, 31 sub-medium segment, 4 power supply module.

[0014] DETAILED DESCRIPTION

[0015] The principles and features of the embodiments of the present disclosure are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present disclosure, and not to limit the scope of the present disclosure.

[0016] As shown in Fig. 1, the embodiments of the present disclosure provide a dielectric barrier discharge device, which comprises a dielectric barrier discharge assembly and a power supply module 4.

[0017] The dielectric barrier discharge assembly comprises a first electrode 1, a second electrode 2, and a barrier medium 3 separating the first electrode 1 and the second electrode 2. The barrier medium 3 is in a cylindrical shape. The internal space of the barrier medium 3 forms a discharge space, and the barrier medium 3 is arranged in a segmented structure comprising a plurality of sub-medium segments 31. The sub-medium segments 31 can be in a cylindrical shape, i.e. a tubular medium.

[0018] The power supply module 4 is electrically connected to the first electrode 1 and the second electrode 2, and is arranged to load a voltage on the first electrode 1 and the second electrode 2, so that the dielectric barrier discharge assembly generates dielectric barrier discharge in the discharge space. The power supply module 4 comprises a high-voltage power supply.

[0019] The dielectric barrier discharge device provided by the embodiments of the present disclosure improves the barrier medium 3 from a whole segment structure to a segmented structure, which can shorten the length of each sub-medium segment 31 while the total length of the barrier medium 3 remains unchanged (i.e. the discharge area remains unchanged), thereby facilitating the outward diffusion of active substances such as sterilization factors in each sub-medium segment 31, facilitating the sufficient contact of the active substances with the air inside and outside the barrier medium 3, and further facilitating the improvement of the decontamination effect.

[0020] In some exemplary embodiments, as shown in FIG. 1, the first electrode 1 is an inner electrode, and the second electrode 2 is an outer electrode. It can be that the blocking medium 3 is sleeved on the outside of the first electrode 1, and the second electrode 2 is sleeved on the outside of the blocking medium 3, i.e., the first electrode 1, the blocking medium 3, and the second electrode 2 are sequentially arranged from inside to outside. Or it can be that the first electrode 1 is embedded inside the blocking medium 3, the second electrode 2 is sleeved on the outside of the blocking medium 3, and the first electrode 1 is separated from the second electrode 2 by the blocking medium 3. Or it can be that the blocking medium 3 is sleeved on the outside of the first electrode 1, and the second electrode 2 is embedded inside the blocking medium 3, and the first electrode 1 is separated from the second electrode 2 by the blocking medium 3.

[0021] In some exemplary embodiments, as shown in FIG. 1, the first electrode 1 is arranged to extend along the central axis of the blocking medium 3. The second electrode 2 is arranged as a spiral electrode, and the spiral electrode is wound on the outer surface of the blocking medium 3. The spiral electrode can be a single spiral electrode, or can be a multi-spiral electrode.

[0022] In this way, the discharge space is uniformly discharged in the circumferential direction, thereby facilitating the improvement of the uniformity of the active factor, and avoiding the sparking phenomenon caused by uneven discharge.

[0023] Of course, the structural form of the first electrode 1 and the second electrode 2 is not limited to the above form, and can be adjusted according to needs. For example, the first electrode 1 can be a tubular electrode, and the tubular electrode is sleeved on the inner wall surface of the blocking medium 3. Or the first electrode 1 can be a spiral electrode, and the spiral electrode is wound on the inner wall surface of the blocking medium 3. The second electrode 2 can be a tubular electrode, and the tubular electrode is sleeved on the outer wall surface of the blocking medium 3.

[0024] In some exemplary embodiments, the blocking medium 3 is an insulating medium, such as quartz glass, etc.

[0025] In some example embodiments, the first electrode 1 is a high-voltage electrode, and the second electrode 2 is a ground electrode or a low-voltage electrode. In this case, the first electrode 1 is electrically connected to the high-voltage end of the power supply module 4, and the second electrode 2 is electrically connected to the ground end or low-voltage end of the power supply module 4. Alternatively, the first electrode 1 is a ground electrode or a low-voltage electrode, and the second electrode 2 is a high-voltage electrode. In this case, the second electrode 2 is electrically connected to the high-voltage end of the power supply module 4, and the first electrode 1 is electrically connected to the ground end or low-voltage end of the power supply module 4. Alternatively, both the first electrode 1 and the second electrode 2 are high-voltage electrodes. In this case, the power supply module 4 can include two high-voltage packs. The first electrode 1 and the second electrode 2 are respectively electrically connected to the high-voltage ends of the two high-voltage packs. However, the output voltages of the two high-voltage packs have a phase difference, so that the loading voltages of the first electrode 1 and the second electrode 2 have a phase difference.

[0026] In some example embodiments, when the dielectric barrier discharge device is in operation, a gas flow passes through the dielectric barrier discharge device. The direction of the gas flow is parallel to the central axis of the dielectric barrier 3, or the direction of the gas flow is not parallel to the central axis of the dielectric barrier 3. For example, the direction of the gas flow is perpendicular to the central axis of the dielectric barrier 3. For another example, the direction of the gas flow forms an angle with the central axis of the dielectric barrier 3.

[0027] In some other example embodiments, when the dielectric barrier discharge device is in operation, no gas flow passes through the dielectric barrier discharge device. The air around the dielectric barrier 3 has no obvious disturbance of the gas flow. The active substances generated by the dielectric barrier discharge device diffuse outward based on the concentration difference.

[0028] In some example embodiments, as shown in FIG. 1, the second electrode 2 is provided in a segmented structure including a plurality of sub-electrode segments 21. Each sub-dielectric segment 31 is provided with at least one sub-electrode segment 21 outside.

[0029] The second electrode 2 is correspondingly provided in a segmented structure, which facilitates the assembly and fixation between the second electrode 2 and the dielectric barrier 3, and is also conducive to avoiding the sparking phenomenon between the second electrode 2 and the first electrode 1 between adjacent sub-dielectric segments 31.

[0030] In some example embodiments, the plurality of sub-electrode segments 21 are connected in parallel, as shown in FIG. 1.

[0031] In this way, the loading voltage between the sub-electrode segments 21 outside the different sub-medium segments 31 and the first electrode 1 is the same. When the lengths of the two adjacent sub-medium segments 31 are different (i.e., the "one long and one short" design), the electric field strength generated by the sub-medium segment 31 with a longer length is larger due to a larger discharge area, and the electric field strength generated by the sub-medium segment 31 with a shorter length is smaller due to a smaller discharge area. Different electric field strengths can achieve a distorted electric field distribution under the same high-voltage power supply, and the overall discharge in space is non-uniform, forming a wave-like pushing electric field, which is beneficial to the diffusion of active factors in the sub-medium segment 31 with a longer length.

[0032] In some exemplary embodiments, the first electrode 1 is in a whole-segment structure, as shown in FIG. 1. In this way, the assembly and fixation between the first electrode 1 and the blocking medium 3 are facilitated, and the line connection between the dielectric barrier discharge assembly and the power supply module 4 is also facilitated.

[0033] In other embodiments, the first electrode 1 can be provided in a segmented structure.

[0034] In other embodiments, the second electrode 2 is provided in a whole-segment structure, and the first electrode 1 is provided in a segmented structure, so that the second electrode 2 and the first electrode 1 cannot be opposite to each other at the gap between the adjacent sub-medium segments 31 (i.e., the second electrode 2 and the first electrode 1 cannot appear together at the gap between the adjacent sub-medium segments 31 and are opposite to each other), so as to avoid the occurrence of sparking.

[0035] In some exemplary embodiments, the spacing between the adjacent sub-medium segments 31 is in the range of 10 mm to 40 mm, such as 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, etc.

[0036] In this way, it is beneficial to avoid that the spacing between the adjacent sub-medium segments 31 is too small to affect the diffusion of active factors, and it is also beneficial to avoid that the spacing between the adjacent sub-medium segments 31 is too large to be not conducive to the generation of a distorted electric field.

[0037] Of course, the spacing between the adjacent sub-medium segments 31 is not limited to the above range and can be adjusted according to requirements.

[0038] In some exemplary embodiments, the inner diameter (inner diameter) of the blocking medium 3 or the sub-medium segment 31 is in the range of 0.3 mm to 3 mm, such as 0.3 mm, 0.5 mm, 0.9 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, etc. In some exemplary embodiments, the diameters of the plurality of sub-medium segments 31 are the same.

[0039] In this way, it is beneficial to install the first electrode 1 into the blocking medium 3, facilitate the diffusion of active substances generated by the first electrode 1 in the blocking medium 3, and also avoid impurities from entering the blocking medium 3.

[0040] Of course, the inner diameter of the blocking medium 3 or the sub-medium segment 31 is not limited to the above range and can be adjusted according to requirements.

[0041] In some exemplary embodiments, the total length of the blocking medium 3 is greater than or equal to 35 mm.

[0042] It is found through experimental research that when the total length of the blocking medium 3 is less than 35 mm, the diffusion effect of active factors is good, and the segmented design of the blocking medium 3 does not bring obvious improvement effect on the removal of pollutants. When the total length of the blocking medium 3 is greater than or equal to 35 mm, the diffusion effect of active factors is poor, and the segmented design of the blocking medium 3 brings more obvious improvement effect on the removal of pollutants.

[0043] Of course, when the total length of the blocking medium 3 is less than 35 mm, the blocking medium 3 can also be designed in a segmented manner.

[0044] In some exemplary embodiments, the number of sub-medium segments 31 is less than or equal to 3. In other words, the blocking medium 3 is designed in a two-segment structure or a three-segment structure, and generally will not be divided into four segments or more segments, because research has found that more than three segments will increase the process assembly difficulty of the medium blocking discharge assembly, but the improvement effect on the removal of pollutants is limited.

[0045] In some exemplary embodiments, 35 mm≤the total length of the blocking medium 3<100 mm, and the blocking medium 3 is designed in a two-segment structure including two sub-medium segments 31.

[0046] It is verified through experiments that when the total length of the blocking medium 3 is within the above range, the blocking medium 3 adopts a two-segment structure, which can achieve good pollutant removal effect and has low process assembly difficulty.

[0047] In some embodiments, the two sub-medium segments 31 are respectively referred to as a first segment and a second segment, the length of the first segment is L1, and the length of the second segment is L2. The positional relationship between the first segment and the second segment has nothing to do with the airflow direction of the discharge space. In other words, the airflow can flow from the first segment to the second segment, or can flow from the second segment to the first segment, and both can promote the outward diffusion of active substances in the relatively long sub-medium segment 31 through the distorted electric field.

[0048] Wherein, L1 / L2≤1, and the ratio of L1 to L2 is positively correlated with the output voltage of the power supply module 4. The output voltage of the power supply module 4 refers to the absolute value of the peak voltage.

[0049] When the output voltage of the power supply module 4 is low, the single-point discharge intensity of the discharge electrode is weak, and the active factor energy generated is low and difficult to diffuse. Therefore, when the output voltage of the power supply module 4 is low, in order to enable the active factor in the long tube to diffuse smoothly, a "long-short" design can be used. The electric field intensity generated in the long tube is large due to the large discharge area, and the electric field intensity generated in the short tube is small due to the small discharge area. The two electric field intensities realize a distorted electric field distribution under the same high-voltage power supply, and the overall discharge in space is non-uniform, forming a wave-like pushing electric field, which is beneficial to the diffusion of the active factor in the long tube.

[0050] When the output voltage of the power supply module 4 is high, the single-point discharge intensity of the discharge electrode is strong, and the active factor energy is high and more easily diffused. At this time, the blocking medium 3 is uniformly segmented, which can fully utilize the length of the blocking medium 3 to diffuse as many active factors as possible, so the strategy of equal proportion segmentation is preferred.

[0051] Therefore, as the output voltage of the power supply module 4 increases, the ratio of L1 to L2 has a trend of increasing (not limited to continuous increase, or can be stepwise increase), that is, it is positively correlated with the output voltage of the power supply module 4.

[0052] In some embodiments, the ratio of L1 to L2 and the output voltage of the power supply module 4 satisfy the following relationship:

[0053] When the output voltage of the power supply module 4 is less than 3kV, L1:L2=1:(1.8 to 2.2, such as 1.8, 1.9, 2.0, 2.1, 2.2, etc.), that is, (1:2.2)≤(L1:L2)≤(1:1.8);

[0054] Alternatively, when the output voltage of the power supply module 4 is greater than 6kV, L1:L2=1:1.

[0055] Alternatively, when the output voltage of the power supply module 4 is greater than 6kV, L1:L2=1:1.

[0056] Through experimental verification, when the ratio of L1 to L2 and the output voltage of the power supply module 4 satisfy the above relationship, a better pollutant removal effect can be achieved, as shown in the following table of Examples 1 to 9 and Comparative Examples 1 to 9.

[0057] Of course, the ratio of L1 to L2 and the output voltage of the power supply module 4 are not limited to the above relationship, and can be adjusted according to requirements.

[0058] In some embodiments, when 35mm≤total length of the blocking medium 3<100mm, the output voltage of the power supply module 4≤10kV, which is conducive to reducing the risk of breakdown of the blocking medium 3 and avoiding excessive power and heat of the power supply module 4.

[0059] In some other exemplary embodiments, the total length of the blocking medium 3≥100mm, and the blocking medium 3 is arranged in a three-segment structure including three sub-medium segments 31.

[0060] In some embodiments, the three sub-medium segments 31 are sequentially referred to as a first segment, a second segment, and a third segment. The length of the first segment is denoted as L1, the length of the second segment is denoted as L2, and the length of the third segment is denoted as L3. The positional relationship between the first segment and the third segment is irrelevant to the flow direction of the airflow in the discharge space. In other words, the airflow can flow from the first segment to the third segment, or can flow from the third segment to the first segment, both of which can promote the outward diffusion of active substances in the relatively long sub-medium segment 31 by the distorted electric field.

[0061] wherein L1 / L2≥1, L2 / L3≤1, the ratio of L1 to L2 is negatively correlated with the output voltage of the power supply module 4, and the ratio of L2 to L3 is positively correlated with the output voltage of the power supply module 4. L1≥L2, and L2≤L3. L1 and L3 can be equal. The output voltage of the power supply module 4 refers to the absolute value of the peak voltage.

[0062] As mentioned above, when the output voltage of the power supply module 4 is low, the single-point discharge intensity of the discharge electrode is weak, and the energy of the active factor generated is low, which is difficult to diffuse. Therefore, when the output voltage of the power supply module 4 is low, in order to enable the active factor in the long tube to diffuse smoothly, the “long-short-long” design can be adopted to form a wave-like pushing electric field, which is conducive to the diffusion of the active factor in the long tube on both sides of the short tube. Moreover, compared with the “short-long-short” design, the “long-short-long” design can avoid the situation that the single sub-medium segment 31 is too long to limit the pushing effect of the distorted electric field and thus make it difficult to ensure the sufficient diffusion of active substances when the total length of the blocking medium 3 is equal.

[0063] When the output voltage of the power supply module 4 is high, the single-point discharge intensity of the discharge electrode is strong, and the energy of the active factor is high, which is more likely to diffuse. At this time, the blocking medium 3 is uniformly segmented, which can make full use of the length of the blocking medium 3 to diffuse as many active factors as possible, so the strategy of equal proportion segmentation is preferred.

[0064] Therefore, as the output voltage of the power supply module 4 increases, the ratio of L1 to L2 has a decreasing trend (not limited to continuous decrease, or can be stepwise decrease), that is, it is negatively correlated with the output voltage of the power supply module 4; and the ratio of L2 to L3 has an increasing trend (not limited to continuous increase, or can be stepwise increase), that is, it is positively correlated with the output voltage of the power supply module 4.

[0065] In some embodiments, the ratio of L1, L2, L3, and the output voltage of the power supply module 4 satisfy the following relationship:

[0066] The output voltage of the power supply module 4 < 4kV, L1:L2:L3 = (1.8 to 2.2, such as 1.8, 1.9, 2.0, 2.1, 2.2, etc.):1:(1.8 to 2.2, such as 1.8, 1.9, 2.0, 2.1, 2.2, etc.), that is, (1.8:1:2.2)≤(L1:L2:L3)≤(2.2:1:1.8); or,

[0067] 4kV≤the output voltage of the power supply module 4≤8kV, L1:L2:L3 = (1.4 to 1.6, such as 1.4, 1.5, 1.6, etc.):1:(1.4 to 1.6, such as 1.4, 1.5, 1.6, etc.), that is, (1.4:1:1.6)≤(L1:L2:L3)≤(1.6:1:1.4); or,

[0068] The output voltage of the power supply module 4 > 8kV, L1:L2:L3 = 1:1:1.

[0069] In some embodiments, when the total length of the blocking medium 3 ≥ 100mm, the output voltage of the power supply module 4 ≤ 12kV, which is conducive to reducing the risk of breakdown of the blocking medium 3, and avoiding excessive power and heat of the power supply module 4.

[0070] It has been verified through experiments that when the ratio of L1, L2, L3, and the output voltage of the power supply module 4 satisfy the above relationship, a better pollutant removal effect can be achieved, which will be described in detail in the following table of Examples 10 to 17 and Comparative Examples 10 to 17.

[0071] Of course, the ratio of L1, L2, L3, and the output voltage of the power supply module 4 are not limited to the above relationship, and can be adjusted according to needs.

[0072] In some exemplary embodiments, the total length of the blocking medium 3 ≤ 200mm. When the total length of the blocking medium 3 is too large, the size of the dielectric barrier discharge device is too large, which affects the air volume and is not convenient to install, affecting the universality of the dielectric barrier discharge device.

[0073] The embodiments of the present disclosure also provide an air treatment device comprising the dielectric barrier discharge device of any one of the above embodiments, thus having all the beneficial effects described above, which will not be described here again.

[0074] In some exemplary embodiments, the air treatment device is provided with an air duct, and an air inlet and an air outlet communicating with the air duct. The dielectric barrier discharge device can be arranged at the air inlet, or can be arranged in the air duct, or can be arranged at the air outlet. The air treatment device can comprise a fan.

[0075] In some exemplary embodiments, the air treatment device can be an air conditioner, an air purifier, a humidifier, a dehumidifier, etc.

[0076] In some exemplary embodiments, the air volume of the air treatment device is 1200m 3 / h.

[0077] The sterilization effects of some embodiments and comparative examples (air volume: 1200m 3 / h) are introduced below.

[0078] As can be seen from the comparison of the sterilization rates of the above embodiments and the comparative examples, after the blocking medium is designed in a segmented manner with a suitable ratio, it is beneficial for the active substance to diffuse outward, thereby improving the 2h sterilization rate. Moreover, the segmented ratio of the blocking medium is related to the total length of the blocking medium and the output voltage of the power supply module. When the segmented ratio of the blocking medium and the total length of the blocking medium and the output voltage of the power supply module satisfy the relationship defined in the foregoing embodiments, the 2h sterilization rate can be significantly improved.

[0079] In the above different embodiments, the spacing between adjacent sub-medium segments 31 is the same (about 20mm), and in different comparative examples and embodiments, the inner diameter of the blocking medium 3 or the sub-medium segment 31 is the same (about 2mm).

[0080] Experimental verification shows that when the spacing between adjacent sub-medium segments 31 changes in the range of 10mm to 40mm, or the inner diameter of the blocking medium 3 (or the sub-medium segment 31) changes in the range of 0.3mm to 3mm, the sterilization rate of the blocking medium 3 without segmentation is different from the above table, but after the blocking medium 3 is segmented according to the ratio adopted in the embodiments, the sterilization rate after segmentation has a similar change rule as the above table. Therefore, the segmented blocking medium design with a suitable ratio adopted by the present disclosure is also applicable to different spacing between adjacent sub-medium segments 31 and different inner diameters of the blocking medium 3 (or the sub-medium segment 31).

[0081] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0082] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and do not imply or suggest relative importance or a number of the technical features indicated. Thus, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly limited.

[0083] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. The above-mentioned terms in the present application can be understood according to the situation by those skilled in the art.

[0084] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0085] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described features, structures, materials or characteristics can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples, without contradiction.

[0086] Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A dielectric barrier discharge device, comprising: a dielectric barrier discharge assembly comprising a first electrode, a second electrode, and a barrier dielectric separating the first electrode and the second electrode, the barrier dielectric being in a cylindrical shape, an inner space of the barrier dielectric forming a discharge space, and the barrier dielectric being arranged in a segmented structure comprising a plurality of sub-dielectric segments; a power supply module electrically connected to the first electrode and the second electrode, and arranged to load the first electrode and the second electrode with a voltage to cause the dielectric barrier discharge assembly to generate a dielectric barrier discharge in the discharge space.

2. The dielectric barrier discharge device of claim 1, wherein, the first electrode is an inner electrode, and the second electrode is an outer electrode, the second electrode being arranged in a segmented structure comprising a plurality of sub-electrode segments; each of the sub-dielectric segments is provided with at least one of the sub-electrode segments on the outside thereof.

3. The dielectric barrier discharge device of claim 2, wherein, the plurality of sub-electrode segments are connected in parallel.

4. The dielectric barrier discharge device of claim 2, wherein, the first electrode is in a whole segmented structure.

5. The dielectric barrier discharge device according to any one of claims 1 to 4, wherein, the number of the sub-dielectric segments is less than or equal to 3.

6. The dielectric barrier discharge device according to any one of claims 1 to 4, wherein the total length of the barrier dielectric is greater than or equal to 35 mm.

7. The dielectric barrier discharge device according to any one of claims 1 to 4, wherein the spacing between adjacent sub-dielectric segments is in a range of 10 mm to 40 mm.

8. The dielectric barrier discharge device according to any one of claims 1 to 4, wherein, 35 mm≤ the total length of the barrier dielectric < 100 mm, and the barrier dielectric is arranged in a two-segment structure comprising two sub-dielectric segments.

9. The dielectric barrier discharge device of claim 8, wherein, the two sub-dielectric segments are respectively denoted as a first segment and a second segment, the length of the first segment is denoted as L1, and the length of the second segment is denoted as L2; L1 / L2≤1, and the ratio of L1 to L2 is positively correlated with the output voltage of the power supply module.

10. The dielectric barrier discharge device of claim 8, wherein, the ratio of L1 to L2 and the output voltage of the power supply module satisfy the following relationship: the output voltage of the power supply module < 3 kV, L1:L2 = 1:(1.8 to 2.2); or, 3 kV≤ the output voltage of the power supply module ≤ 6 kV, L1:L2 = 1:(1.4 to 1.6); or, the output voltage of the power supply module > 6 kV, L1:L2 = 1:

1.

11. The dielectric barrier discharge device according to any one of claims 1 to 4, wherein, the total length of the barrier dielectric ≥ 100 mm, and the barrier dielectric is arranged in a three-segment structure comprising three sub-dielectric segments.

12. The dielectric barrier discharge device of claim 11, wherein, the three sub-dielectric segments are sequentially denoted as a first segment, a second segment, and a third segment, the length of the first segment is denoted as L1, the length of the second segment is denoted as L2, and the length of the third segment is denoted as L3; L1 / L2≥1, L2 / L3≤1, and the ratio of L1 to L2 is negatively correlated with the output voltage of the power supply module; the ratio of L2 to L3 is positively correlated with the output voltage of the power supply module.

13. The dielectric barrier discharge device of claim 11, wherein, the ratio of L1, L2, and L3 and the output voltage of the power supply module satisfy the following relationship: the output voltage of the power supply module < 4 kV, L1:L2:L3 = (1.8 to 2.2):1:(1.8 to 2.2); or, 4 kV≤ the output voltage of the power supply module ≤ 8 kV, L1:L2:L3 = (1.4 to 1.6):1:(1.4 to 1.6); or, the output voltage of the power supply module > 8 kV, L1:L2:L3 = 1:1:

1. the first electrode is arranged to extend along a central axis of the barrier dielectric.

14. The dielectric barrier discharge device according to any one of claims 1 to 4, wherein, ​ 15. The dielectric barrier discharge device according to any one of claims 1 to 4, wherein, The second electrode is arranged as a spiral electrode which is wound around the outer surface of the barrier medium.

16. An air treatment device comprising a dielectric barrier discharge device according to any one of claims 1 to 15.

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