Low Temperature Plasma Air Purifier with High Speed Ion Wind Self-adsorption

Abstract

The present invention discloses a low temperature plasma air purifier with high speed ion wind self-adsorption, which comprises a power module releasing a high-voltage direct current, a housing functioning as a support, an emitter electrode generating a strong ionization field, and a dust collecting electrode adsorbing various particles, wherein the emitter electrode comprises one or more needle-like conductors, circular holes fitted with each of the needle-like conductors are provided on the dust collecting electrode. The present invention has a simple structure and a small size, and realizes a high purification speed without the assistance of fans. The porous metal structure of the dust collecting electrode increases the contact area for air purification so that the dust collecting electrode has a strong adsorbability, which ensures a good air purification effect.

Claims

1. A low temperature plasma air purifier with high speed ion wind self-adsorption, comprising a power module releasing a high-voltage direct current, a housing functioning as a support, an emitter electrode generating a strong ionization field, and a dust collecting electrode adsorbing various particles, wherein the emitter electrode comprises one or more needle-like conductors, circular holes fitted with each of the needle-like conductors are provided on the dust collecting electrode, the one or more needle-like conductors on the emitter electrode are extracted from the power module and directed toward the circular holes on the dust collecting electrode, the power module is detachably secured to the housing or is provided separately from the housing, and a plasma region is formed by enclosure of the emitter electrode and the dust collecting electrode.

2. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 1, wherein the circular hole has an arc-shaped transition section on the inner wall at the opening thereof, and the transition section is provided at a position where the needle-like conductor is inserted.

3. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 2, wherein the arc of the transition section has a chamfer angle from 5° to 170°

4. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 2, wherein the arc of the transition section has a chamfer angle from 15° to 75°.

5. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 2, wherein the conductor of the emitter electrode has a length from 2 nm to 20 nm.

6. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 5, wherein the conductor of the emitter electrode has a length from 5 mm to 15 mm.

7. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 1, wherein the needle-like conductor is composed of a cylindrical body and a pointed tip in an integrated structure, one end of the cylindrical body connected to the high voltage power supply circuit and the other end thereof formed as the pointed tip, and the pointed tip of each needle-like conductor is directed toward the center of the corresponding circular hole on the dust collecting electrode.

8. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 7, wherein the dust collecting electrode and the power module are electrically connected through a wire extracted from the power module, the circular holes on the dust collecting electrode are arranged in a circular array or a rectangle array, and the circular holes have a bore diameter of 5˜50 mm.

9. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 5, further comprising an air guide cone preventing the dust from gathering, which has a curved cone structure and is accommodated within the housing, with a tip part pointed at an air inlet of the housing.

10. The low temperature plasma air purifier with high speed ion wind self-adsorption according to claim 9, further comprising a cover provided at the air inlet of the housing, a plurality of grooves fitted with fixing legs being provided on the housing, and the cover and the housing being detachably fixed together.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is an exploded view of a low temperature plasma air purifier with high speed ion wind self-adsorption of this invention with an internal power supply;

[0020] FIG. 2 is a sectional view of the low temperature plasma air purifier with high speed ion wind self-adsorption of this invention;

[0021] FIG. 3 is an equivalent exploded view of a low temperature plasma air purifier with high speed ion wind self-adsorption of this invention with an external power supply;

[0022] FIG. 4 is an equivalent view of the assembly structure of an emitter electrode and a dust collecting electrode in the low temperature plasma air purifier with high speed ion wind self-adsorption of this invention;

[0023] FIG. 5 is a structural view of the dust collecting electrode in the low temperature plasma air purifier with high speed ion wind self-adsorption of this invention.

REFERENCE NUMERALS

[0024] 10. Power module;

[0025] 11. Housing;

[0026] 12. Emitter electrode;

[0027] 13. Dust collecting electrode;

[0028] 14. Air guide cone;

[0029] 15. Cover;

[0030] 121. Needle-like conductor;

[0031] 131. Circular hole.

DETAILED DESCRIPTION

[0032] Here is a detailed description with reference to the drawings to explain the invention more clearly.

[0033] As shown in FIGS. 1 and 2, in this invention, a low temperature plasma air purifier with high speed ion wind self-adsorption comprises a power module 10 releasing a high-voltage direct current, a housing 11 functioning as a support, an emitter electrode 12 generating a strong ionization field, and a dust collecting electrode 13 adsorbing various particles, wherein the emitter electrode 12 comprises one or more needle-like conductors 121, circular holes 131 fitted with each of the needle-like conductors 121 are provided on the dust collecting electrode 13, the one or more needle-like conductors 121 on the emitter electrode 12 are extracted from the power module 10 and directed toward the circular holes 131 on the dust collecting electrode 13, the power module 10 is detachably secured to the housing 11 or provided separately from the housing 11, and a plasma region is formed by enclosure of the emitter electrode 12 and the dust collecting electrode 13.

[0034] According to one aspect of the invention, the emitter electrode 12 is provided as comprising a plurality of needle-like conductors 121, circular holes 131 fitted with each of the needle-like conductors 121 are provided on the corresponding dust collecting electrode 13, and the circular hole 131 has an arc-shaped transition section on the inner wall at the opening thereof. Such design, especially the design of the transition section, facilitates the air flow through the circular hole and is able to effectively increase the wind speed, so that the characteristic of high speed self-adsorption is achieved to reduce the size of a plasma air purifier and improve the purification efficiency thereof under the same conditions.

[0035] The arc of the transition section has a chamfer angle of generally 5° to 170°, preferably 15° to 75°.

[0036] The conductor 121 of the emitter electrode has a length of 2 nm to 20 nm, preferably 5 mm to 15 mm.

[0037] With reference to FIGS. 3 and 4, compared with the prior art, in the low temperature plasma air purifier with high speed ion wind self-adsorption of this invention, the power module 10 generates a high voltage and is connected to the emitter electrode 12, the strong ionization field region generated by the electric electrode 12 produces high speed electrons directed to the dust collecting electrode 13 and generates a plasma region around the needle tips, and a wind is formed when electrons and charged particles moving at a high speed collide inelastically with and adhere to contaminant molecules and other particles in the air to move together toward the dust collecting electrode 13. The arc-shaped transition section facilitates the air flow through the circular holes so that the wind speed is effectively increased. Dust adheres, by inelastic collision, to electrons moving at a high speed when passing through the plasma region generated by the emitter electrode 12, and under the action of electrostatic forces, negatively charged particles move toward the dust collecting electrode 13 to adhere thereto, thereby accomplishing the purification of particulate matter in the air. TVOC, formaldehyde, and fungus molecules are subjected to oxidative decomposition when passing through the plasma region as their molecules are directly oxidized and destroyed by high-energy electrons and oxidized groups generated in the plasma region, and moreover, high speed high-energy charged particles have penetrating damages to virus and fungus cells and thus are able to kill them.

[0038] The present invention realizes a high purification speed and a good purification effect with a simple structure and a small size, without the assistance of fans. The porous metal structure of the dust collecting electrode increases the contact area for air purification so that the dust collecting electrode has a strong adsorbability. Using the low temperature plasma technique achieves low power consumption and remarkable energy saving and silencing effects.

[0039] As FIG. 3 further shown, the needle-like conductor 121 is composed of a cylindrical body and a pointed tip in an integrated structure, one end of the cylindrical body connected to the high voltage power supply circuit and the other end thereof formed as the pointed tip, and the pointed tip of each needle-like conductor 121 is directed toward the center of the corresponding circular hole 131 on the dust collecting electrode 13. The needle-like conductor 121 is characterized by: [0040] 1. the length of the needle being 2-20 mm; [0041] 2. the voltage of the emitter electrode 12 being +3 KV˜+50 KV; −3 KV˜−50 KV; [0042] 3. the distance from the emitter electrode 12 to the dust collecting electrode 13 being 5˜50 mm.

[0043] With reference to FIG. 5, in the embodiment, the dust collecting electrode 13 and the power module 10 are electrically connected through a metal probe extracted from the power module 10, the circular holes 131 on the dust collecting electrode 13 are arranged in a circular array or a rectangle array, the circular hole 131 has a bore diameter of 5˜50 mm and has a transition section 132 on one end, the emitter electrode 12 enters the circular hole 131 from one side of the circular hole 131, and the transition section is positioned at the side where the emitter electrode 12 enters the circular hole 131. The dust collecting electrode 13 has an annular structure which is characterized by: [0044] 1. the thickness of the ring being 2˜200 mm; [0045] 2. the chamfer angle at one side of the transition section being 5°˜170°; [0046] 3. the pore size of the ring being 5˜50 mm; and [0047] 4. the ring being made of metal materials.

[0048] The cross section of the dust collecting electrode may have a shape of circle, oval, triangle, square or polygon, and in the embodiment shown in FIGS. 1 and 5, it has a circular shape.

[0049] In the embodiment, the air purifier further comprises an air guide cone preventing the dust from gathering, which has a curved cone structure and is accommodated within the housing 11, with a tip part pointed at an air inlet of the housing 11. Such structure functions to guide the inlet air for prevention of dust gathering with an aerodynamic design.

[0050] In the embodiment, the air purifier further comprises a cover 15 provided at the air inlet of the housing 11, a plurality of grooves fitted with fixing legs are provided on the housing 11, and the cover 15 and the housing 11 are detachably fixed together.

[0051] The foregoing is only a description of preferred embodiments of the present invention, and is not intended to limit the invention in any way. Any variation that may be made by those of ordinary skill in the art is covered under the protection scope claimed therein.