CN210411151U - Corona discharge device and air purifier - Google Patents
Corona discharge device and air purifier Download PDFInfo
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- CN210411151U CN210411151U CN201920927679.7U CN201920927679U CN210411151U CN 210411151 U CN210411151 U CN 210411151U CN 201920927679 U CN201920927679 U CN 201920927679U CN 210411151 U CN210411151 U CN 210411151U
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Abstract
The application relates to the technical field of air purification devices, in particular to a corona discharge device and an air purifier comprising the same. The corona discharge device comprises a fixed electrode, a rotating body, a needle electrode and an alternating current power supply, wherein the outer surface of the fixed electrode is a first cylindrical surface, and the fixed electrode is grounded; the inner surface of the rotating body is a second cylindrical surface, and the second cylindrical surface is sleeved outside the first cylindrical surface; a plurality of needle electrodes are arranged on the inner surface of the rotating body, and the tips of the needle electrodes face the second cylindrical surface; an alternating current power supply is electrically connected with the needle electrode. The corona discharge device that this application technical scheme provided produces low temperature plasma through the corona discharge form, produces a large amount of active particles, and needle electrode's point discharge produces the corona district to the earthing pole, drives needle electrode rotation through the rotator for corona district increases, and purifying effect strengthens.
Description
Technical Field
The application relates to the technical field of air purification devices, in particular to a corona discharge device and an air purifier comprising the same.
Background
Corona discharge has been used for a long time and is a relatively common discharge mode that can be accomplished at atmospheric pressure. In the vicinity of an electrode having a relatively small radius of curvature, a voltage is applied, and a gas in the vicinity of the electrode is broken down to generate an uneven discharge, that is, a corona discharge. There is a higher electric field strength near the electrode at the tip, making the gas more easily ionized at this location, the gas ionizes with light emission and silky sound, and produces reactive particles such as radicals, here a corona region, while at a distance from the tip the electric field strength is weaker so that the gas remains unionized, here a non-corona region. Corona discharge has a simple structure, a stable system and high energy utilization rate, but has the defects of low energy injection, and the discharge, luminescence and ionization basically exist only in the vicinity of the electrode and are not uniform, so when the voltage is further enhanced, the corona is caused to develop towards spark breakdown.
Corona discharge plasma technique wide application is in the air purification field at present, through the entrapment effect of electric field to the particulate matter, collects the particulate matter in the air, and the electric field is stronger, and corona district is big more, collects the particulate matter ability and is stronger more, and the collection effect is better, and current corona plasma structure is lower to particulate matter disposable treatment effect, consequently urgently needs a novel plasma structure to handle the particulate matter.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem or at least partially solve the above technical problem, the present application provides a corona discharge device and an air purifier.
In order to achieve the above object, according to one aspect of the present invention, there is provided a corona discharge device.
The corona discharge device according to the embodiment of the application comprises:
the outer surface of the fixed electrode is a first cylindrical surface, and the fixed electrode is grounded;
the inner surface of the rotating body is a second cylindrical surface, and the second cylindrical surface is sleeved outside the first cylindrical surface;
a plurality of needle electrodes are arranged on the inner surface of the rotating body, and the tips of the needle electrodes face the second cylindrical surface;
and the alternating current power supply is electrically connected with the needle electrode.
Further, the first cylindrical surface and the second cylindrical surface are coaxially arranged.
Further, the tips of the needle electrodes point to the axis of the first cylindrical surface.
Furthermore, the needle electrodes are distributed on the first cylindrical surface along the axial direction in multiple layers, and the needle electrodes in each layer are uniformly distributed.
Further, the rotation angular velocity ω of the rotating body around the axis of the second cylindrical surface satisfies:
omega is more than or equal to 2 pi f/n, wherein,
omega is the rotating angular speed of the rotating body around the axis of the second cylindrical surface, and the unit is rad/s,
f is the frequency of the alternating current power supply in hertz,
n is the number of needle electrodes in each layer.
Further, the fixed electrode is in a circular ring column shape.
Further, the corona discharge device further comprises a driving device for driving the rotating body to rotate around the axis of the second cylindrical surface.
Furthermore, the rotating body and the fixed electrode are both made of 304 stainless steel.
Further, the working voltage of the alternating current power supply is 5kv-10kv, and the frequency is 50 Hz.
In order to achieve the above object, according to a second aspect of the present invention, there is also provided an air cleaner.
An air purifier according to the embodiment of the application comprises the corona discharge device.
The corona discharge device that this application technical scheme provided produces low temperature plasma through the corona discharge form, produces a large amount of active particles, and needle electrode's point discharge produces the corona district to the earthing pole, drives needle electrode rotation through the rotator for corona district increases, and purifying effect strengthens.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic diagram of a corona discharge device according to an embodiment of the present disclosure;
fig. 2 schematically shows a cross-sectional view of a partial structure of a corona discharge device provided in an embodiment of the present application.
In the figure:
1. a fixed electrode; 2. a rotating body; 3. a needle electrode; 4. an alternating current power supply; 5. and a ground line.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail with reference to the accompanying drawings 1 and 2 in conjunction with an embodiment. FIG. 1 is a block diagram of a corona discharge device according to an embodiment of the present disclosure; fig. 2 is a cross-sectional view of a partial structure of a corona discharge device according to an embodiment of the present application.
As shown in fig. 1 and 2, the corona discharge device includes a fixed electrode 1, a rotating body 2, a needle electrode 3, and an alternating current power source 4. The outer surface of the fixed electrode 1 is a first cylindrical surface, and the fixed electrode 1 is grounded through a grounding wire 5; the inner surface of the rotating body 2 is a second cylindrical surface which is sleeved outside the first cylindrical surface; a plurality of needle electrodes 3 are arranged on the inner surface of the rotating body 2, and the tips of the needle electrodes 3 face the second cylindrical surface; the alternating current power supply 4 is electrically connected with the needle electrode 3 and is used for providing a high-voltage power supply for the needle electrode.
When the alternating current power source 4 of the corona discharge device applies voltage to the needle electrode 3, the high electric field intensity exists near the tip of the needle electrode, so that the gas is easier to be ionized at the position, the gas is ionized and accompanied by light emission and silk noise, and active particles such as free radicals are generated. The corona discharge device that this embodiment provided can produce low temperature plasma through the corona discharge form, produces a large amount of active particles, and needle electrode 3's point discharge produces the corona district to grounded fixed electrode 1, drives needle electrode 3 through rotator 2 and rotates, can be so that corona district area increase, purifying effect reinforcing. In the process of rotating the needle electrode 3, the needle electrode can generate corona discharge to the air on the moving path of the needle electrode, the area of a corona area is enlarged, the output voltage of the alternating current power supply 4 does not need to be increased, and the generation amount of ozone is reduced.
In the corona discharge device provided by the embodiment of the application, the first cylindrical surface and the second cylindrical surface are preferably coaxially arranged, so that the direct distances between the first cylindrical surface and the second cylindrical surface are uniformly distributed, the tips of the needle-shaped electrodes 3 can be controlled to be arranged at equal intervals with the surface of the grounded fixed electrode 1, and the discharge stability is realized. Preferably, the tips of the needle electrodes 3 are all directed to the axis of the first cylindrical surface, and when the specifications of each needle electrode 3 are the same, it is further ensured that the tips of the respective needle electrodes 3 are disposed at equal distances from the surface of the grounded fixed electrode 1.
In the corona discharge device provided by the embodiment of the application, as shown in fig. 1, the needle-shaped electrodes 3 can be distributed with multiple layers on the first cylindrical surface along the axial direction, so that a large number of needle-shaped electrodes 3 can be arranged, the area of corona discharge can be enlarged in the space, the distance between the layers can be set according to specific requirements, and in the discharge process, the adjacent two layers of needle-shaped electrodes 3 can not interfere. As shown in fig. 2, the plurality of needle electrodes 3 in each layer are uniformly distributed, i.e., are distributed in a circular array about the axis, so that the corona generated by the needle electrodes is uniformly distributed in each layer.
In the corona discharge device provided in the embodiment of the present application, in order to obtain a larger corona discharge area under the condition that the plurality of needle electrodes 3 in each layer are uniformly distributed, the rotation angular velocity ω of the rotating body 2 around the second cylindrical surface axis satisfies the following conditions:
omega is more than or equal to 2 pi f/n, wherein,
omega is the rotating angular speed of the rotating body around the axis of the second cylindrical surface, and the unit is rad/s,
f is the frequency of the alternating current power supply and is in hertz,
n is the number of needle electrodes in each layer.
The period of corona discharge is controlled by the output frequency of the ac power supply 4, and when ω is 2 pi f/n, each needle electrode 3 rotates to the position of the next needle electrode 3 in the same layer immediately adjacent to the needle electrode 3 after the end of one discharge period, that is, all the electrodes in the same layer rotate by one turn in one discharge period, and the maximum discharge area is covered.
It should be noted that, the specific shapes of the fixed electrode 1 and the rotating body 2 in the above embodiment are not specifically limited, and it is only required to ensure that the outer surface of the fixed electrode 1 is a first cylindrical surface and the inner surface of the rotating body 2 is a second cylindrical surface. Preferably, in the corona discharge device shown in fig. 1 and 2, the fixed electrode 1 and the rotating body 2 are both in a circular cylindrical shape.
In the corona discharge device provided by the embodiment of the present application, a driving device for driving the rotating body 2 to rotate around the axis of the second cylindrical surface is further provided, and specific driving manners of the driving device include, but are not limited to, gear set driving, rack and pinion driving, high-speed motor direct driving, and belt driving.
In the above embodiment, the material of the rotating body 2 and the fixed electrode 1 is 304 stainless steel, and the rotating body and the fixed electrode 1 have preferable conductivity and heat resistance under the premise of having certain strength, the working voltage of the alternating current power supply 4 is preferably 5kv-10kv, the frequency is 50 hz, the distance between the fixed electrode 1 and the tip of the needle electrode 3 is preferably 15-30mm, and the distance can be specifically adjusted by combining the discharge voltage.
This embodiment still provides an air purifier, and its structure includes the corona discharge device that provides in the above embodiment of this application.
Because the air purifier comprises the corona discharge device disclosed in the above embodiments, the air purifier with the corona discharge device also has all the technical effects, and the details are not repeated herein. The air purifier according to the above embodiment may further include other necessary components or structures such as an air duct, a fan, a control circuit, etc., and the corresponding arrangement position and connection relationship may refer to the air purifier in the prior art, and the connection relationship, operation and working principle of each un-mentioned structure are known to those skilled in the art and will not be described in detail herein.
Some embodiments in this specification are described in a progressive or parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
The foregoing is merely a detailed description of the invention that enables those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A corona discharge device, comprising:
the outer surface of the fixed electrode (1) is a first cylindrical surface, and the fixed electrode (1) is grounded;
the inner surface of the rotating body (2) is a second cylindrical surface, and the second cylindrical surface is sleeved outside the first cylindrical surface;
a plurality of needle electrodes (3) are arranged on the inner surface of the rotating body (2), and the tips of the needle electrodes (3) face the second cylindrical surface;
and an alternating current power supply (4) electrically connected to the needle electrode (3).
2. The corona discharge device of claim 1 wherein said first cylindrical surface and said second cylindrical surface are coaxially disposed.
3. Corona discharge device as claimed in claim 2, characterized in that the tips of the needle electrodes (3) are each directed towards the axis of the first cylindrical surface.
4. Corona discharge device as claimed in claim 3 wherein the needle electrodes (3) are distributed axially in a plurality of layers on the first cylindrical surface, the plurality of needle electrodes (3) in each layer being evenly distributed.
5. Corona discharge device as claimed in claim 4, wherein the rotational angular velocity ω of the rotary body (2) about the second cylindrical axis is such that:
omega is more than or equal to 2 pi f/n, wherein,
omega is the rotating angular speed of the rotating body around the axis of the second cylindrical surface, and the unit is rad/s,
f is the frequency of the alternating current power supply in hertz,
n is the number of needle electrodes in each layer.
6. Corona discharge device as claimed in claim 1, characterized in that the stationary electrode (1) is of circular cylindrical shape.
7. Corona discharge device as claimed in claim 1, further comprising drive means for driving the rotation body (2) in rotation about the axis of the second cylindrical surface.
8. Corona discharge device as claimed in claim 1, characterized in that the rotary body (2) and the fixed electrode (1) are both 304 stainless steel.
9. Corona discharge device as claimed in claim 1, characterized in that the operating voltage of the alternating current source (4) is 5kv-10kv and the frequency is 50 Hz.
10. An air purifier comprising a corona discharge device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920927679.7U CN210411151U (en) | 2019-06-18 | 2019-06-18 | Corona discharge device and air purifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920927679.7U CN210411151U (en) | 2019-06-18 | 2019-06-18 | Corona discharge device and air purifier |
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| CN210411151U true CN210411151U (en) | 2020-04-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191727A (en) * | 2020-09-22 | 2021-01-08 | 长沙高新开发区锦德电子科技有限公司 | Stamping die of needle electrode, plasma needle electrode and preparation method thereof |
| CN112570149A (en) * | 2020-11-25 | 2021-03-30 | 燕山大学 | Low-voltage corona dust removal pipeline |
-
2019
- 2019-06-18 CN CN201920927679.7U patent/CN210411151U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191727A (en) * | 2020-09-22 | 2021-01-08 | 长沙高新开发区锦德电子科技有限公司 | Stamping die of needle electrode, plasma needle electrode and preparation method thereof |
| CN112570149A (en) * | 2020-11-25 | 2021-03-30 | 燕山大学 | Low-voltage corona dust removal pipeline |
| CN112570149B (en) * | 2020-11-25 | 2021-08-27 | 燕山大学 | Low-voltage corona dust removal pipeline |
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