Dielectric barrier discharge device and air treatment equipment

Abstract

The utility model provides a dielectric barrier discharge device and air treatment equipment. The dielectric barrier discharge device comprises a dielectric barrier discharge assembly which comprises a first electrode, a second electrode and a barrier medium which separates the first electrode from the second electrode, the barrier medium is cylindrical, and the internal space of the barrier medium forms a discharge space; the first electrode is an internal electrode, the second electrode is an external electrode, at least one of the first electrode and the second electrode comprises a carbon fiber bundle, and the carbon fiber bundle comprises a plurality of carbon fibers; and the power supply module is electrically connected with the first electrode and the second electrode and is arranged to load voltage to the first electrode and the second electrode, so that the dielectric barrier discharge component generates dielectric barrier discharge in the discharge space. According to the scheme, the ion concentration in the product can be improved to remove particulate matters, meanwhile, the discharge capacity can be effectively improved, the removal effect on bacteria and gaseous pollutants is enhanced, and the dielectric barrier discharge device has the functions of removing the bacteria, the gaseous pollutants and the particulate matters.

Description

Technical Field

[0001] This application relates to, but is not limited to, the field of air purification technology, and specifically refers to a dielectric barrier discharge device and an air treatment equipment. Background Art

[0002] In related technologies, the discharge structure of a coaxial cylindrical dielectric barrier discharge (DBD) device is as follows: an insulating tube (i.e., a dielectric tube) serves as a barrier medium, an internal electrode (electrode wire) is placed inside the insulating tube, an external electrode is arranged outside the insulating tube, and the internal space of the insulating tube between the internal electrode and the external electrode forms a high-voltage discharge region, generating various active factors, which can be used for purification treatment such as sterilization and odor removal of the air to be purified. In order to obtain a better sterilization and odor removal effect, the two ends of the insulating tube are usually not sealed, and the active factors generated inside the insulating tube can be released outside the insulating tube. When the air to be purified passes through the inside or outside of the insulating tube, it is purified by reacting with the active factors. The active factors generated by DBD discharge have strong oxidizing properties and can destroy the cell structure of bacteria and the molecular structure of gaseous pollutants, so they have a removal effect on these pollutants, but have no removal effect on PM2.5 particulate matter and cannot be used to remove particulate matter, which limits the use of DBD technology. Summary of the Utility Model

[0003] The technical problem to be solved by this application is to provide a dielectric barrier discharge device and an air treatment equipment, which can improve the ion concentration in the product and can be used to remove particulate matter by improving the electrodes.

[0004] An embodiment of this application provides a dielectric barrier discharge device, including: a dielectric barrier discharge assembly, including 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, and the internal space of the barrier medium forming a discharge space; the first electrode is an internal electrode, the second electrode is an external electrode, and at least one of the first electrode and the second electrode includes a carbon fiber bundle, and the carbon fiber bundle includes a plurality of carbon fiber filaments; and a power supply module, electrically connected to the first electrode and the second electrode, and configured to apply a voltage to the first electrode and the second electrode so that the dielectric barrier discharge assembly generates dielectric barrier discharge in the discharge space.

[0005] Compared with ordinary metal wires, the electric field intensity generated by the single filaments (i.e., single carbon fiber filaments) of the carbon fiber bundle and the barrier medium is relatively large, and microdischarge is likely to form between the single filaments. Therefore, when carbon fiber is used as an electrode, the initial discharge voltage will be lower, that is, it is easier to be excited to discharge. Moreover, carbon fiber belongs to a semiconductor material, and its conductivity is much lower than that of metal, and the electron emission ability on the surface is weak, which can reduce the amount of secondary electron release, making the discharge electron avalanche process not too strong, thereby forming a stable discharge plasma, improving the discharge effect, and further increasing the removal effect on bacteria and gaseous pollutants.

[0006] In addition, carbon fiber has a unique structure in which a bundle of fibers is composed of hundreds, even thousands of filaments, and a unique tip discharge phenomenon can be formed at the end of each filament, enabling monopolar discharge of air to form a large number of ions, thereby increasing the ion concentration in the product. The ions can agglomerate and settle the particulate matter in the air, thus achieving the removal of particulate matter.

[0007] Therefore, the dielectric barrier discharge device provided by the embodiments of the present application can increase the ion concentration in the product through the improvement of the electrodes, be used to remove particulate matter, effectively improve the discharge ability at the same time, enhance the removal effect on bacteria and gaseous pollutants, and enable the dielectric barrier discharge device to have the functions of removing bacteria, gaseous pollutants and particulate matter.

[0008] Based on the above technical solutions, the present application can also be improved as follows.

[0009] In an exemplary embodiment, the first electrode is arranged as the carbon fiber bundle.

[0010] In an exemplary embodiment, the first electrode is arranged as a linear electrode.

[0011] In an exemplary embodiment, the first electrode includes an electrode body and the carbon fiber bundle connected to one end of the electrode body.

[0012] In an exemplary embodiment, the carbon fiber bundle is connected to the electrode body by ultrasonic bonding; alternatively, the carbon fiber bundle is connected to the electrode body by glue bonding.

[0013] In an exemplary embodiment, the electrode body is arranged to extend along the central axis of the barrier medium.

[0014] In an exemplary embodiment, the second electrode is arranged as the carbon fiber bundle.

[0015] In an exemplary embodiment, the carbon fiber bundle includes n carbon fiber filaments, where 1000 ≤ n ≤ 12000.

[0016] In an exemplary embodiment, the first electrode is arranged in the central region of the barrier medium; and / or, the second electrode is arranged as a spiral electrode, and the spiral electrode is wound around the outer surface of the barrier medium.

[0017] In an exemplary embodiment, the first electrode is connected to the high-voltage end of the power supply module, and the second electrode is connected to the ground end or the low-voltage end of the power supply module.

[0018] An embodiment of the present application further provides an air treatment device, including the dielectric barrier discharge device described in any one of the above embodiments. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of a dielectric barrier discharge device provided by some embodiments of the present application;

[0020] Figure 2 It is a schematic structural diagram of a dielectric barrier discharge device provided by some embodiments of the present application;

[0021] Figure 3 It is a schematic structural diagram of a dielectric barrier discharge device provided by some embodiments of the present application;

[0022] Figure 4 It is a schematic structural diagram of a dielectric barrier discharge device provided by some embodiments of the present application.

[0023] In the drawings, the list of components represented by each reference numeral is as follows:

[0024] 1 First electrode, 11 Electrode body, 2 Second electrode, 3 Barrier medium, 4 Power supply module, 5 Carbon fiber bundle. Detailed Embodiments

[0025] The principles and features of the present application will be described below with reference to the drawings. The examples given are only used to explain the present application and are not intended to limit the scope of the present application.

[0026] As Figures 1 to 4 shown, an embodiment of the present application provides a dielectric barrier discharge device, including: a dielectric barrier discharge assembly and a power supply module 4.

[0027] As Figures 1 to 4 shown, the dielectric barrier discharge assembly includes a first electrode 1, a second electrode 2, and a barrier medium 3 that separates the first electrode 1 from the second electrode 2. The barrier medium 3 is cylindrical, and a discharge space is provided inside the barrier medium 3. The barrier medium 3 can be a cylindrical medium with both ends open, that is, a tubular medium.

[0028] The power supply module 4 is electrically connected to the first electrode 1 and the second electrode 2, and is configured to apply a voltage to 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 includes a high-voltage power supply.

[0029] Among them, at least one of the first electrode 1 and the second electrode 2 includes a carbon fiber bundle 5, and the carbon fiber bundle 5 includes a plurality of carbon fiber filaments.

[0030] Compared with ordinary metal wires, the electric field intensity generated by the single filaments (i.e., single carbon fiber filaments) of the carbon fiber bundle 5 and the blocking medium 3 is relatively large, and microdischarge is likely to form between the single filaments. Therefore, when carbon fiber is used as an electrode, the initial discharge voltage will be lower, that is, it is easier to be excited to discharge. Moreover, carbon fiber belongs to semiconductor material, with a conductivity much lower than that of metal and a weak electron emission ability on the surface, which can reduce the amount of secondary electron release, making the discharge electron avalanche process not too intense, thus forming a stable discharge plasma, improving the discharge effect, and further increasing the removal effect on bacteria and gaseous pollutants.

[0031] In addition, carbon fiber has a unique structure in which a bundle of fibers consists of hundreds, thousands, or even tens of thousands of single filaments, and a unique tip discharge phenomenon can be formed at the end of each single filament, enabling monopolar discharge of air to form a large number of ions such as negative ions, thereby increasing the ion concentration in the product, and the ions can agglomerate and settle the particulate matter in the air, thus achieving the removal of particulate matter.

[0032] Therefore, the dielectric barrier discharge device provided by the embodiments of the present application can increase the ion concentration in the product to remove particulate matter by improving the electrode, and at the same time can effectively improve the discharge ability and enhance the removal effect on bacteria and gaseous pollutants, enabling the dielectric barrier discharge device to have the functions of removing bacteria, gaseous pollutants, and particulate matter.

[0033] In some exemplary embodiments, the blocking medium 3 is an insulating medium, such as quartz, glass, etc.

[0034] In some exemplary embodiments, the first electrode 1 is a high-voltage electrode, and the second electrode 2 is a grounded electrode or a low-voltage electrode. Then, the first electrode 1 is connected to the high-voltage end of the power supply module 4, and the second electrode 2 is connected to the grounded end or the low-voltage end of the power supply module 4. The high-voltage end of the power supply module 4 can output, for example, a negative high voltage. With the above power connection method, the high-voltage electrode is located inside the blocking medium 3, and the electrical safety is relatively high. Or, the first electrode 1 is a grounded electrode or a low-voltage electrode, and the second electrode 2 is a high-voltage electrode. Then, the second electrode 2 is connected to the high-voltage end of the power supply module 4, and the first electrode 1 is connected to the grounded end or the low-voltage end of the power supply module 4. Or, both the first electrode 1 and the second electrode 2 are high-voltage electrodes. Then, the power supply module 4 can include two high-voltage packages, and the first electrode 1 and the second electrode 2 are respectively connected to the high-voltage ends of the two high-voltage packages, but there is a phase difference in the output voltages of the two high-voltage packages, so that there is a phase difference in the applied voltages between the first electrode 1 and the second electrode 2.

[0035] In some exemplary embodiments, when the dielectric barrier discharge device operates, there is an air flow passing through the dielectric barrier discharge device. The direction of the air flow is parallel to the central axis of the barrier medium 3, or the direction of the air flow is not parallel to the central axis of the barrier medium 3. For example, the wind direction of the air flow is perpendicular to the central axis of the barrier medium 3, or for another example, the air flow forms a certain angle with the central axis of the barrier medium 3. In some other exemplary embodiments, when the dielectric barrier discharge device operates, there is no air flow passing through the dielectric barrier discharge device, and there is no obvious air flow disturbance around the barrier medium 3. The active substances generated by the dielectric barrier discharge device diffuse outward based on the concentration difference.

[0036] In some exemplary embodiments, as Figure 1 shown, the first electrode 1 is an internal electrode, and the second electrode 2 is an external electrode. It can be that the barrier medium 3 is sleeved outside the first electrode 1, and the second electrode 2 is sleeved outside the barrier medium 3, that is: the first electrode 1, the barrier medium 3, and the second electrode 2 are arranged in sequence from the inside to the outside. It can also be that the barrier medium 3 is sleeved outside the first electrode 1, and the second electrode 2 is embedded inside the barrier medium 3 and separated from the first electrode 1 by the barrier medium 3.

[0037] In some embodiments, the first electrode 1 is arranged as a carbon fiber bundle 5, as Figure 1 and Figure 4 shown. In other words, the first electrode 1 is integrally arranged as a carbon fiber bundle 5. The structural form of the second electrode 2 is not limited, and it can be a metal electrode or at least partially a carbon fiber bundle 5 (as Figure 4 shown).

[0038] Among them, the first electrode 1 can be arranged as a linear electrode, and the linear electrode includes multiple linear carbon fiber filaments, as Figure 1 and Figure 4 shown.

[0039] In some embodiments, the first electrode 1 includes an electrode body 11 and a carbon fiber bundle 5 connected to one end of the electrode body 11, as Figure 2 shown. In other words, the first electrode 1 is not integrally arranged as a carbon fiber bundle 5, but partially arranged as a carbon fiber bundle 5. The electrode body 11 part can be made of conductive metal, such as copper, stainless steel, aluminum, etc. The structural form of the second electrode 2 is not limited, and it can be a metal electrode or at least partially a carbon fiber bundle 5.

[0040] The electrode body 11 can be arranged to extend along the central axis of the barrier medium 3. In other words, the electrode body 11 can be arranged in a linear shape. The carbon fiber bundle 5 can be arranged in a linear shape. Or, one end of the carbon fiber bundle 5 far from the electrode body 11 can diverge within a certain angle range.

[0041] As for the connection manner between the electrode body 11 and the carbon fiber bundle 5, there is no limitation. In some examples, the carbon fiber bundle 5 is connected to the electrode body 11 by ultrasonic bonding. In other examples, the carbon fiber bundle 5 is connected to the electrode body 11 by glue bonding, such as by bonding with high-temperature and oxidation-resistant silicone water.

[0042] In some exemplary embodiments, the second electrode 2 is arranged as a carbon fiber bundle 5, as Figure 3 and Figure 4 shown. In other words, the second electrode 2 is integrally arranged as a carbon fiber bundle 5. The structural form of the first electrode 1 is not limited, and it can be a metal electrode or at least partially a carbon fiber bundle 5.

[0043] In some exemplary embodiments, as Figures 1 to 4 shown, the first electrode 1 is arranged in the central region of the barrier medium 3. The second electrode 2 is arranged as a spiral electrode, and the spiral electrode is wound around the outer surface of the barrier medium 3. The spiral electrode can be a single-spiral electrode or a multi-spiral electrode.

[0044] This is beneficial to uniform discharge in the circumferential direction of the discharge space, thereby being beneficial to improving the uniformity of active factors and avoiding the phenomenon of sparking caused by uneven discharge.

[0045] Of course, the structural form of the second electrode 2 is not limited to the above form and can be adjusted as needed. For example: The second electrode 2 can also be a tubular electrode, and the tubular electrode is sleeved on the outer wall surface of the barrier medium 3.

[0046] In some exemplary embodiments, the carbon fiber bundle 5 includes n carbon fiber filaments, where 1000 ≤ n ≤ 12000, such as 1000, 1500, 5000, 8000, 10000, 12000, etc.

[0047] It has been found through research that if the number of single filaments in the carbon fiber bundle 5 is too small (i.e., n is too small), the number of micro-discharges between single filaments will be weakened and it is not easy to be excited to discharge; if the number of single filaments in the carbon fiber bundle 5 is too large (i.e., n is too large), the discharge will be diluted, that is, the discharge ability of single filaments will decrease and it is not easy to be excited to discharge. Setting n within the above range is beneficial to avoiding the above problems and is beneficial to exciting the carbon fiber bundle 5 to discharge.

[0048] Of course, the value range of n is not limited to the above range and can be adjusted according to requirements.

[0049] The embodiment of the present application also provides an air treatment device, including the dielectric barrier discharge device according to any one of the above embodiments, and thus has all the above beneficial effects, which will not be elaborated here.

[0050] 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, can be arranged in the air duct, or can be arranged at the air outlet. A blower can be arranged in the air duct, and the blower can drive the air to flow.

[0051] In some exemplary embodiments, the air treatment device can be an air conditioner, an air purifier, a humidifier, a dehumidifier or other devices with air treatment functions.

[0052] The following introduces the particulate matter removal effect, sterilization effect and gaseous pollutant removal results of some embodiments and comparative examples (the air treatment device is a certain commercially available model air conditioner, 100% air supply).

[0053] solution negative ion concentration particle CADR bacteria removal rate after 2 hours removal rate of gaseous pollutants (ammonia) after 1 hour comparative example 20,000 <![CDATA[11m 3 / h]]> 94％ 40％ Example 1 4,000,000 <![CDATA[90m 3 / h]]> 97％ 45％ Example 2 4,600,000 <![CDATA[93m 3 / h]]> 97％ 47％ Example 3 5,500,000 <![CDATA[95m 3 / h]]> 98％ 48％ Example 4 6,000,000 <![CDATA[100m 3 / h]]> 98％ 48％

[0054] Among them, the solution of Comparative Example 1 is: the first electrode 1 adopts a metal linear electrode, and the second electrode 2 adopts a metal spiral electrode.

[0055] The solution of Embodiment 1 is: the first electrode 1 adopts a carbon fiber bundle 5 linear electrode, and the second electrode 2 adopts a metal spiral electrode, as Figure 1 shown.

[0056] The solution of Embodiment 2 is: the first electrode 1 adopts an electrode body 11 + a carbon fiber bundle 5, and the electrode body 11 adopts a metal linear conductor; the second electrode 2 adopts a metal spiral electrode, as Figure 2 shown.

[0057] The solution of Embodiment 3 is: the first electrode 1 adopts a metal linear electrode, and the second electrode 2 adopts a carbon fiber bundle 5 spiral electrode, as Figure 3 shown.

[0058] The solution of Embodiment 4 is: the first electrode 1 adopts a carbon fiber bundle 5 linear electrode, and the second electrode 2 adopts a carbon fiber bundle 5 spiral electrode, as Figure 4 shown.

[0059] In the above-mentioned embodiments and comparative examples, except for the different electrode forms, the sizes and arrangement modes of the first electrode 1, the second electrode 2 and the barrier medium 3 are basically the same, and the power connection modes of the first electrode 1 and the second electrode 2 are the same.

[0060] From the comparison of the experimental results of Examples 1 to 4 and the comparative examples, it can be seen that: 1) At least one of the first electrode 1 and the second electrode 2 includes a carbon fiber bundle 5, and the negative ion concentration in the product increases significantly, and the particulate matter CADR (Clean Air Delivery Rate) also increases significantly. The particulate matter CADR reflects the ability of the whole machine to remove particulate matter, and the stronger the ability, the higher the CADR value. It can be seen that at least one of the first electrode 1 and the second electrode 2 includes a carbon fiber bundle 5, enabling the dielectric barrier discharge device to have the function of removing particulate matter. 2) At least one of the first electrode 1 and the second electrode 2 includes a carbon fiber bundle 5, and the 2h sterilization rate and the 1h gaseous pollutant (ammonia) removal rate of the dielectric barrier discharge device also increase to varying degrees. It can be seen that at least one of the first electrode 1 and the second electrode 2 includes a carbon fiber bundle 5, and the sterilization effect and the effect of removing gaseous pollutants of the dielectric barrier discharge device are also improved.

[0061] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0062] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0063] In the present application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0064] In this application, unless otherwise clearly stipulated and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0065] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0066] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations to this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A dielectric barrier discharge device, characterized in that: include: A dielectric barrier discharge assembly, comprising a first electrode, a second electrode, and a barrier medium separating the first electrode from the second electrode, wherein the barrier medium is cylindrical, and an inner space of the barrier medium forms a discharge space; The first electrode is an internal electrode, the second electrode is an external electrode, at least one of the first electrode and the second electrode comprises a carbon fiber bundle, the carbon fiber bundle comprises n carbon fiber filaments, 1000≤n≤12000, so that the dielectric barrier discharge device has the function of removing bacteria, gaseous pollutants and particulate matter; and The power supply module is electrically connected to the first electrode and the second electrode, and is configured to apply voltage to the first electrode and the second electrode so that the dielectric barrier discharge component generates dielectric barrier discharge in the discharge space.

2. The dielectric barrier discharge device according to claim 1, characterized in that: The first electrode is arranged as the carbon fiber bundle.

3. The dielectric barrier discharge device according to claim 2, characterized in that: The first electrode is configured as a linear electrode.

4. The dielectric barrier discharge device according to claim 1, characterized in that: The first electrode includes an electrode body and the carbon fiber bundle connected to one end of the electrode body.

5. The dielectric barrier discharge device according to claim 4, characterized in that: The carbon fiber bundle is connected to the electrode body by ultrasonic bonding; or, the carbon fiber bundle is connected to the electrode body by glue bonding.

6. The dielectric barrier discharge device according to claim 4, characterized in that: The electrode body is arranged to extend along a central axis of the blocking medium.

7. The dielectric barrier discharge device according to any one of claims 1 to 6, characterized in that: The second electrode is arranged as the carbon fiber bundle.

8. The dielectric barrier discharge device according to any one of claims 1 to 6, characterized in that: The first electrode is arranged in the central area of ​​the blocking medium; and / or the second electrode is arranged as a spiral electrode, and the spiral electrode is coiled around the outer surface of the blocking medium.

9. The dielectric barrier discharge device according to any one of claims 1 to 6, characterized in that: The first electrode is connected to the high voltage end of the power supply module, and the second electrode is connected to the ground end or the low voltage end of the power supply module.

10. An air treatment device, characterized in that: The invention comprises a dielectric barrier discharge device as claimed in any one of claims 1 to 9.

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