Air cleaning device and method for manufacturing a water-absorbing conductor thereof

Abstract

The present application provides an air cleaning device and a method for manufacturing a water-absorbing conductor thereof, wherein the air cleaning device comprises a negative electrode and a plurality of water-absorbing conductors. The water-absorbing conductors are arranged on the negative electrode, and each of the water-absorbing conductors comprises ceramic fibers coated with a graphene coating. The water-absorbing conductors can disperse water on a large number of small areas to facilitate discharge, and water at any position on the ceramic fibers can be discharged by the graphene coating.

Description

Technical Field

[0001] This invention relates to an air purification device, and more particularly to a discharge-type air purification device and a method for manufacturing the water-absorbing conductor thereof. Background Technology

[0002] Electrostatic atomization is a technique that uses an electric field to disperse water. A pair of electrodes are positioned spaced apart and a high voltage is applied, generating an electric field between them. When a trace amount of water is placed in this electric field at the negative electrode, the water molecules are decomposed into hydroxyl radicals (also known as hydroxyl radicals, chemical formula ˙OH). Hydroxyl radicals are strong oxides containing one unpaired valence electron and carrying a charge. They can destroy microorganisms and decompose chemicals in the air, and can also cause airborne particles to agglomerate and fall off.

[0003] Modern electrostatic atomizing devices mostly use copper needle-shaped negative electrodes. Copper negative electrodes cannot hold water, so atomized water must be sprayed onto them to decompose the trace amounts of water at the needle, releasing hydroxyl radicals. However, this design easily leads to condensation on the surface of the negative electrode. Excessive condensation can cause unstable discharge at the electrode tip. Commonly absorbent materials are non-conductive, so while they can be used with water, they do not improve discharge efficiency.

[0004] In view of this, the inventor has devoted himself to researching and applying theoretical principles to address the aforementioned problems in the prior art, which is the target of the inventor's improvement. Summary of the Invention

[0005] This invention provides a discharge-type air purification device and a method for manufacturing the water-absorbing conductor thereof.

[0006] This invention provides an air purification device, which includes a negative electrode and several water-absorbing conductors. The water-absorbing conductors are disposed on the negative electrode, and each water-absorbing conductor contains at least one ceramic fiber, which is coated with a graphene layer.

[0007] In one embodiment of the present invention, the negative electrode comprises a copper body and a nickel plating layer covering the copper body.

[0008] In one embodiment of the present invention, the copper body is in the form of a long strip.

[0009] In one embodiment of the present invention, the graphene coating comprises several graphene microsheets, the average diameter of the several graphene microsheets being between 50 and 80 mesh, the several graphene microsheets being stacked in 2 to 5 layers, and the thickness of the graphene coating being between 0.3 nm and 1 nm.

[0010] In one embodiment of the present invention, the water-absorbing conductor is columnar.

[0011] In one embodiment of the present invention, one end of the water-absorbing conductor is tapered and the other end is fixed to the negative electrode.

[0012] In one embodiment of the present invention, the ceramic fiber comprises at least one of zirconium oxide, alumina, and silicon carbide.

[0013] In one embodiment of the present invention, the air purifying device further includes a positive electrode, which is arranged alternately with the negative electrode.

[0014] In one embodiment of the present invention, the air purification device further includes a high-voltage module, which includes a positive terminal and a negative terminal, wherein the positive terminal is connected to a positive electrode and the negative terminal is connected to a negative electrode.

[0015] In one embodiment of the present invention, the air purification device further includes a fan, the fan's airflow direction passing across the negative electrode and through the plurality of water-absorbing conductors.

[0016] The present invention provides a method for manufacturing a water-absorbing conductor for an air purification device, comprising the steps described below: providing at least one ceramic fiber, one graphene powder and one binder and mixing them into a mixed raw material; drying the mixed raw material and then curing it into shape.

[0017] In one embodiment of the present invention, before drying the mixed raw materials, a further step is included: providing a mold to shape the mixed raw materials.

[0018] In one embodiment of the present invention, the method further includes: coating the surface of ceramic fibers with graphene powder from the mixed raw materials.

[0019] In one embodiment of the present invention, the ceramic fiber is a fiber made by firing at least one of silicon carbide, alumina, and zirconium oxide.

[0020] The water-absorbing conductors of the air purifying device of the present invention all comprise ceramic fibers, and the surface of the ceramic fibers is coated with a graphene layer. The ceramic fibers themselves have pores, forming a porous structure, thus the water-absorbing conductor has excellent water absorption. By containing water in the ceramic fibers, moisture can be dispersed over a large number of tiny areas, facilitating discharge, and water can discharge at any location on the ceramic fibers through the graphene coating. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an air purification device according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the negative electrode and the water-absorbing conductor in an air purification device according to an embodiment of the present invention.

[0023] Figure 3This is a schematic diagram of the ceramic fibers in the water-absorbing conductor of an air purification device according to an embodiment of the present invention.

[0024] Figure 4 This is a partial cross-sectional view of the ceramic fibers in an air purification device according to an embodiment of the present invention.

[0025] Figure 5 This is another schematic diagram of the negative electrode and the water-absorbing conductor in an air purification device according to an embodiment of the present invention.

[0026] Figure 6 This is another schematic diagram of the negative electrode and the water-absorbing conductor in an air purification device according to an embodiment of the present invention.

[0027] Figure 7 This is a flowchart illustrating the steps of a method for manufacturing a water-absorbing conductor according to an embodiment of the present invention.

[0028] Explanation of symbols in the attached diagram: 110: Negative electrode; 120: Positive electrode; 200: Water-absorbing conductor; 210: Ceramic fiber; 211: Pores; 220: Graphene coating; 221: Graphene microplates; 300: High voltage module; 410: Fan. Detailed Implementation

[0029] In the description of this invention, it should be understood that the terms front, rear, left, right, front end, rear end, end, longitudinal, transverse, vertical, top, bottom, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting conditions of this invention.

[0030] Unless otherwise defined, terms such as "substantially" and "approximately" are used to describe and narrate small changes. When used in connection with an event or situation, the term may include the exact moment the event or situation occurred, or the point in time from which the event or situation occurred. For example, when used in connection with a numerical value, the term may include a range of variation less than or equal to ±10% of the value, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%.

[0031] The detailed description and technical content of the present invention will be explained in conjunction with the accompanying drawings. However, the accompanying drawings are for illustrative purposes only and are not intended to limit the present invention.

[0032] Figure 1 This is a schematic diagram of an air purification device according to an embodiment of the present invention. (See attached diagram.) Figure 1 An embodiment of the present invention provides an air purification device, which includes at least a negative electrode 110 and several water-absorbing conductors 200. Furthermore, the air purification device of the present invention also includes a high-voltage module 300 and a positive electrode 120. The high-voltage module 300 has a positive terminal and a negative terminal, with the negative terminal connected to the negative electrode 110 and the positive terminal connected to the positive electrode 120. The positive electrode 120 is elongated and sheet-like, corresponding to the negative electrode 110, and the positive electrode 120 and the negative electrode 110 are arranged parallel and spaced apart. When the high-voltage module 300 discharges, an electric field is formed between the positive electrode 120 and the negative electrode 110. The air purification device of the present invention also includes a fan 410, whose airflow direction is perpendicular to the negative electrode 110, enabling it to deliver air through each water-absorbing conductor 200 and carry hydroxyl radicals into the ambient air. Hydroxyl radicals are strong oxides containing one unpaired valence electron and carrying a charge. They can destroy microorganisms in the air and decompose toxic chemicals, and can cause airborne particulate matter (such as PM2.5 particles) to agglomerate (e.g., agglomerate into PM10 particles) and fall off.

[0033] In this embodiment, the negative electrode 110 comprises a copper body in the form of a sheet, and the surface of the copper body is covered with a nickel plating layer, wherein the nickel plating layer is trivalent nickel. In this embodiment, the negative electrode 110 is in the form of a long strip sheet, but the present invention is not limited thereto.

[0034] Figure 2 This is a schematic diagram of the negative electrode and the water-absorbing conductor in an air purification device according to an embodiment of the present invention. (See attached diagram) Figure 2 The absorbent conductor 200 is disposed on the negative electrode 110, specifically arranged along the elongated sheet-like negative electrode 110. In this embodiment, the absorbent conductor 200 is a column, with one end being a cone and the other end connected to the negative electrode 110. Figure 3 This is a schematic diagram of the ceramic fibers in the water-absorbing conductor of an air purification device according to an embodiment of the present invention. (See also...) Figure 3Each water-absorbing conductor 200 comprises ceramic fibers 210, and the surface of the ceramic fibers 210 is coated with a graphene coating 220. The ceramic fibers 210 can be selected from zirconium oxide, alumina, silicon carbide, or a combination thereof. The ceramic fibers 210 in the water-absorbing conductor 200 themselves have pores 211, forming a porous structure, thus the water-absorbing conductor 200 has excellent water absorption. The water contained in the ceramic fibers 210 can disperse moisture over a large number of tiny areas, facilitating discharge, and moisture can discharge at any position on the ceramic fibers 210 via the graphene coating 220. This significantly increases the discharge area compared to known tip discharge.

[0035] Figure 4 This is a partial cross-sectional view of the ceramic fibers in an air purification device according to an embodiment of the present invention. (See also...) Figure 4 The graphene coating 220 comprises several graphene microflakes 221. Specifically, the graphene microflakes 221 are scale-like, and their diameter (or width) is between 50 and 80 mesh. The graphene microflakes 221 in the graphene coating 220 are stacked in 2 to 5 layers, and the thickness of the graphene coating 220 is between 0.3 nm and 1 nm. In this embodiment, the graphene microflakes 221 are stacked in 2 layers, and the thickness of the graphene coating 220 is approximately 0.34 nm. The graphene coating 220 covering the ceramic fiber 210 provides good electrical conductivity.

[0036] Figure 5 This is another schematic diagram of the negative electrode and water-absorbing conductor of an air purification device according to an embodiment of the present invention. Figure 6 This is another schematic diagram of the negative electrode and the water-absorbing conductor of an air purification device according to an embodiment of the present invention. However, the present invention does not limit the shape of the water-absorbing conductor 200; for example, the water-absorbing conductor 200 can also be as follows: Figure 5 The cylinder shown or like Figure 6 The sphere shown.

[0037] The water-absorbing conductor 200 can adsorb trace amounts of moisture from the air. When the high-voltage module 300 discharges, the moisture adsorbed in the water-absorbing conductor 200 is excited by the high-voltage negative voltage in the electric field to generate hydroxyl radicals (chemical formula: ˙OH), also known as hydroxyl radicals. The hydroxyl radicals / hydroxyl radicals referred to here are different from the commonly known hydroxyl group (also known as hydroxyl radical, chemical formula -OH). The commonly known hydroxyl radical is a functional group, not the free radical referred to here.

[0038] Figure 7 This is a flowchart illustrating the steps of a method for manufacturing a water-absorbing conductor according to an embodiment of the present invention. (See also...) Figure 7 The aforementioned method for manufacturing the water-absorbing conductor 200 includes the following steps: Several ceramic fibers 210 are added to a graphene powder (5wt%~10wt%) and a binder to form a mixed raw material. The mixing process, such as stirring or soaking, causes the graphene powder in the mixed raw material to coat the surface of the ceramic fibers, thus making the ceramic fibers 210 a carrier of the graphene powder. The ceramic fibers 210 are selected from fibers made of silicon carbide, alumina, zirconium oxide or combinations thereof. Both the ceramic fibers 210 and the graphene powder can withstand high temperatures.

[0039] After the mixed raw materials are shaped and dried, they form a water-absorbing conductor 200. The mixed raw materials can be air-dried naturally or heated and dried until they are cured. There is no limit to the drying time and temperature.

[0040] In this embodiment, a mold can be used to shape the mixed raw materials. The mold is a general mold with a cavity corresponding to a predetermined shape for placing the mixed raw materials for further shaping. Therefore, the mold is not described in detail and is not shown in the figure. In this embodiment, the mold can be used for shaping without pressure. The water-absorbing conductor 200 can be shaped into different shapes according to usage requirements. For example, the water-absorbing conductor 200 can be shaped into... Figure 2 The pyramidal structure shown Figure 5 The cylindrical structure shown or Figure 6 The spherical structure shown.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Other equivalent variations that utilize the patent spirit of the present invention should all fall within the patent scope of the present invention.

Claims

1. An air purification device, characterized in that, include: One negative electrode; and Several water-absorbing conductors are disposed on the negative electrode. Each water-absorbing conductor contains at least one ceramic fiber and the ceramic fiber is coated with a graphene layer.

2. The air purification device according to claim 1, characterized in that, The negative electrode comprises a copper body and a nickel plating layer covering the copper body.

3. The air purification device according to claim 2, characterized in that, The copper body is in the shape of a long strip.

4. The air purification device according to claim 1, characterized in that, The graphene coating comprises several graphene microflakes with an average diameter between 50 and 80 mesh. The graphene microflakes are stacked in 2 to 5 layers, and the thickness of the graphene coating is between 0.3 nm and 1 nm.

5. The air purification device according to claim 1, characterized in that, The absorbent conductor is columnar.

6. The air purification device according to claim 5, characterized in that, One end of the absorbent conductor is tapered and the other end is fixed to the negative electrode.

7. The air purification device according to claim 1, characterized in that, The ceramic fiber contains at least one of zirconium oxide, alumina, and silicon carbide.

8. The air purification device according to claim 1, characterized in that, It also includes a positive electrode, which is spaced apart from the negative electrode.

9. The air purification device according to claim 8, characterized in that, It also includes a high-voltage module, which has a positive terminal and a negative terminal, the positive terminal being connected to the positive electrode and the negative terminal being connected to the negative electrode.

10. The air purification device according to claim 1, characterized in that, It also includes a fan that blows air across the negative electrode and through the several water-absorbing conductors.

11. A method for manufacturing a water-absorbing conductor for an air purifier: characterized in that, step include: Provide at least one ceramic fiber, one graphene powder and one binder and mix them into a mixed raw material; and The mixed raw materials are dried and then cured into shape.

12. The method for manufacturing the water-absorbing conductor of the air purifying device according to claim 11, characterized in that, Before drying the mixture, a further step is included: providing a mold to shape the mixture.

13. The method for manufacturing the water-absorbing conductor of the air purification device according to claim 11, characterized in that, It also includes: graphene powder from the mixed raw materials coated on the surface of ceramic fibers.

14. The method for manufacturing the water-absorbing conductor of the air purifying device according to claim 11, characterized in that, The ceramic fiber is a fiber made by firing at least one of silicon carbide, alumina, and zirconium oxide.

Images