Electron release device

Abstract

An electron release device is characterized in that the electron release device is provided with a negative voltage generation module and an electron emission head, the negative voltage V-output end of the negative voltage generation module is electrically connected to the electron emission head, and the working end of the electron emission head is provided with a plurality of conductive fibers. The conductive fiber is driven by the negative voltage V-to release electrons to the outside and generate ionic wind based on a needle tip discharge principle; the roots of all the conductive fibers and the free ends of all the conductive fibers form a shape similar to a circular truncated cone, the roots are located at the small end of the circular truncated cone, the free ends are located at the large end of the circular truncated cone, and the included angle a between the generatrix of the circular truncated cone shape and the axis is not smaller than 10 degrees.

Description

Technical Field

[0001] The present invention relates to an electronic release device, and more particularly to a mechanical structure that can significantly improve the working life of the electron emission head of the electronic release device. Background Art

[0002] In social life, electronic release devices are generally used to generate negative oxygen ions in the air, and have functions such as purifying air, deodorizing and sterilizing, and conditioning the heart and blood.

[0003] Existing electronic release devices generally use a large number of parallel bundled conductive fibers as the working end of the electron emission head. Since the diameter of each conductive fiber is generally about 10 μm, only a relatively low negative voltage V- is required to discharge externally to release electrons and generate an ion wind.

[0004] Because there are a large number of dust particles in the air, in actual work, the dust particles will gradually accumulate at the working end of the electron emission head due to the electric field adsorption effect. Among them, some dust particles have a resistivity less than 0.1 Ω / μm, which causes the free ends of adjacent conductive fibers to be electrically connected to each other, thereby greatly increasing the equivalent radius of the conductor in the corresponding area, and resulting in the inability to release electrons externally through the tip discharge effect under the action of the original negative voltage V-; while other dust with a larger resistivity will block the electrons. Therefore, the accumulation of dust at the free end is the main factor causing the failure of the electron emission head.

[0005] According to years of experience, in an ordinary room, the effective life of the working end of the electron emission head is about 4 months; in an ordinary factory, the working end of the electron emission head is about 1 month; in a humid mine shaft or cabin, the working end of the electron emission head is about 0.5 months.

[0006] And the harsher the environment, the more we hope that the working end of the electron emission head can work for a longer time, reducing the frequency of maintenance, repair, and replacement; even in the field of civilian products, it is unacceptable to clean and replace the electron emission head about every 4 months.

[0007] Therefore, it is necessary to design a new working end of the electron emission head that can significantly improve the effective life, especially the effective life in the presence of a large amount of conductive dust, without substantially increasing the cost and volume. Summary of the Invention

[0008] The present invention discloses an electron releasing device, characterized by having a negative voltage generating module and an electron emitting head. The negative voltage V- output terminal of the negative voltage generating module is electrically connected to the electron emitting head. The working end of the electron emitting head has a plurality of conductive fibers. Under the drive of the negative voltage V-, the conductive fibers release electrons to the outside based on the principle of tip discharge and generate an ionic wind. The roots of all the conductive fibers and the free ends of all the conductive fibers form a frustum-like shape. The roots are located at the small end of the frustum, and the free ends are located at the large end of the frustum. The angle a between the generatrix of the frustum and the axis is not less than 12°.

[0009] Since the free ends of the existing parallel bundled conductive fibers are generally made by a cutting process, the overall shape of the parallel bundled conductive fibers is similar to a cylinder, and the gap between the free ends located at the bottom surface of the cylinder is very small. Therefore, when the electron releasing device is working, the air driven by the ionic wind will generate a strong swirling separation bubble rotating towards the bottom surface of the cylinder when passing over the bottom surface of the cylinder. Therefore, most of the dust in this part of the air will come into contact with the free ends, and thus part of it will be adsorbed on the free ends, causing the free ends to fail. Therefore, if the swirling can be reduced and the flowing air can smoothly pass through the free ends, then the contact and accumulation of dust on the free ends can be effectively reduced; or if the dust contacting the free ends can be blocked in advance, the contact and accumulation of dust on the free ends can also be significantly reduced.

[0010] Based on the fact that the lobe spoiler in aerodynamics can more effectively reduce the swirling separation bubble, the inventor of the present invention invented to spread the free ends of the conductive fibers to form a frustum-like shape, and the angle a between the generatrix of the frustum and the axis is not less than 12°. Among them, the side surface of the frustum serves as a spoiler, and because there are obvious gaps between the free ends of adjacent conductive fibers, a large number of lobe-like structures are formed, thus jointly realizing a local structure similar to an annular lobe spoiler.

[0011] According to observations, when the air driven by the ionic wind during the operation of the electron emitting head disclosed in the present invention passes through the local structure of the lobe deflector formed by the free ends of the conductive fibers, a large number of very small and mutually canceling swirling separation bubbles will be formed. Therefore, on the one hand, the chance of dust contacting the free ends can be greatly reduced, and on the other hand, the disordered structure formed by the conductive fibers located at the edge of the frustum can intercept the dust in the air contacting the free ends, reducing the dust concentration in the swirling separation bubbles, and protecting the remaining conductive fibers from dust pollution in a two-pronged manner.

[0012] In actual tests, the inventor observed that on the working end of the working electron emission head, dust would preferentially accumulate in a circular shape on the conductive fibers at the edge of the frustum to form a failure area, causing the conductive fibers at the edge of the frustum to lose their function first, but the conductive fibers inside the circle could still work normally. As time passed, the inner diameter of the circle would gradually shrink, but the rate of increase in the area of the circular failure area on the existing electron emission head was much slower. According to the experimental records, the effective life length of the new electron emission head disclosed in the present invention was increased by 5 to 10 times compared to the effective life of the existing electron emission head using a parallel beam structure.

[0013] For the civilian field, the effective life of the new electron emission head is about 20 to 30 months in the daily environment, which basically meets the needs of daily life. However, for the industrial and mining industries and the water operation field, this is still not enough. It is necessary to work continuously for at least 2 years in the industrial environment to meet the requirements.

[0014] Therefore, in order to further block the dust in the air without affecting the function of releasing electrons, the present invention also has a pre-dust suction module. The pre-dust suction module is a conductor that does not significantly impede the fluid from flowing along the axis of the frustum. The pre-dust suction module is arranged in the upwind area of the ion wind at the free end of the conductive fiber, and the pre-dust suction module is electrically connected to the negative voltage V- output terminal. Therefore, preferably, the shape of the pre-dust suction module is one or a combination of two-dimensional mesh, two-dimensional radiation needle shape, two-dimensional spiral line shape, three-dimensional mesh, three-dimensional test tube brush shape, and three-dimensional solenoid.

[0015] In actual tests, the inventor observed that the pre-dust suction module would first adsorb the dust in the air flowing through the pre-dust suction module through electrostatic adsorption, thereby significantly reducing the dust density flowing into the conductive fiber, and could approximately increase the effective life of the new electron emission head by 3 to 10 times. Therefore, the maximum effective life of the new electron emission head disclosed in the present invention is about 4 years, which can fully meet the needs of the industrial and mining industries and the water operation field.

[0016] Therefore, the beneficial effect of the present invention is that without increasing the cost, by adjusting the shape of the working end of the electron emission head, the effective life can be greatly improved by up to 10 times, or by slightly increasing the cost further, a pre-dust suction module is set, and the effective life is further improved to the maximum effect of 100 times. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a dust flow diagram when the existing electron release device is working.

[0018] Figure 2 is a coordinate diagram of the working duration VS electron release amount of the existing electron release device.

[0019] Figure 3 This is the dust flow diagram when the first embodiment of the novel electron release device disclosed in the present invention is working.

[0020] Figure 4 This is the coordinate diagram of the working duration VS electron release amount of the first embodiment of the novel electron release device disclosed in the present invention.

[0021] Figure 5 This is the dust flow diagram when the second embodiment of the novel electron release device disclosed in the present invention is working.

[0022] Figure 6 This is the coordinate diagram of the working duration VS electron release amount of the second embodiment of the novel electron release device disclosed in the present invention. Detailed implementation manners

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention and do not limit the application scope of the present invention. For those of ordinary skill in the art, without creative efforts, the present invention can be applied to other similar scenarios based on these drawings; as shown in this specification and the claims, unless the context clearly indicates an exceptional situation, words such as "one", "a", "an", and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the term "comprising" or "including" only indicates the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The term "based on" means "at least partially based on".

[0024] In Figure 1 , Figure 3 , Figure 5 , both the existing electron release device and the novel electron release device include a negative voltage generation module 2 and an electron emission head 1. The negative voltage V- output terminal of the negative voltage generation module 2 is electrically connected to the electron emission head 1. The electron emission head 1 further includes a working end 11 formed by a large number of conductive fibers. During operation, the working end 11 releases electrons e- along the electric field direction, thereby generating an ionic wind and driving the air flow shown by the dotted arrow.

[0025] In Figure 2 , Figure 4 , Figure 6 , the horizontal axis of the coordinate system is time, with units of days, months, and years respectively. The vertical axis is the ratio of the electrons released compared to those of a clean electron emission head. The target-shaped multi-layer concentric rings are schematic diagrams of observing the electron emission head along the axial direction. The thin dotted line represents that it has not been contaminated by dust and still has complete or most functions, and the thick dotted line represents that it has been contaminated by dust and lost or significantly reduced its functions.

[0026] In Figure 1 , after the air passes over the bottom surface of the cylinder formed by the parallel bundled conductive fibers, most of the air near the side surface of the cylinder will swirl and contact the free end located on the bottom surface of the cylinder due to the turbulent separation bubble, resulting in rapid dust deposition. As Figure 2 shown, over time, dust will gradually accumulate on the surface of the free end from the outer circle to the center, forming an annular failure area shown by the thick dashed line that can no longer release electrons, and all free ends will accumulate dust and completely fail within only dozens of days.

[0027] In Figure 3 , the air near the side surface of the frustum will pass through the gaps between the free ends near the side surface of the frustum, thus generating a large number of tiny and mutually canceling vortex separation bubbles, leaving the dust in this part of the air on the side surface and free ends of the conductive fibers near the side surface of the frustum, thereby protecting the remaining conductive fibers from dust contamination. As Figure 4 shown, compared with Figure 2 , the electron emission head 11 of the first embodiment of the present invention not only has its effective life increased by several times, but also has a higher electron release efficiency when approaching the end of its life.

[0028] In Figure 5 , a pre-dust collection module 3 made of a three-dimensional metal mesh and electrically connected to the negative voltage V- output terminal of the negative voltage generation module 2 is added. The air near the side surface of the frustum will first pass through the pre-dust collection module 3, so most of the dust in the air will be adsorbed by the electric field of the pre-dust collection module 3, and only a small part of the dust can still contact the conductive fibers near the side surface of the frustum and then be further adsorbed, so that there is almost no dust in the air contacting the remaining conductive fibers. Therefore, in the industrial environment represented by Figure 6 , the effective life of the electron emission head of the first embodiment of the present invention can meet the requirement of more than 2 years.

Claims

1. An electronic release device, characterized in that, It has a negative voltage generation module and an electron emission head, The negative voltage V- output terminal of the negative voltage generation module is electrically connected to the electron emission head, The working end of the electron emission head has a plurality of conductive fibers, and the conductive fibers release electrons to the outside and generate ionic wind based on the tip discharge principle under the drive of the negative voltage V-. The roots of all the conductive fibers and the free ends of all the conductive fibers form a frustum-like shape. The roots are located at the small end of the frustum, the free ends are located at the large end of the frustum, and the angle a between the generatrix of the frustum and the axis is not less than 12°.

2. The electronic release device according to claim 1, wherein It also has a pre-dust suction module. The pre-dust suction module is a conductor that does not significantly impede the flow of fluid along the axis of the frustum. The pre-dust suction module is arranged in the upwind area of the free end of the conductive fiber located in the ionic wind, and the pre-dust suction module is electrically connected to the negative voltage V- output terminal.

3. The electronic release device according to claim 2, characterized in that, The shape of the pre-dust suction module is one or a combination of two-dimensional mesh, two-dimensional radiation needle shape, two-dimensional spiral line shape, three-dimensional mesh, three-dimensional test tube brush shape, and three-dimensional solenoid.

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