Electrostatic dust filter

Patent metadata

Field	Value
Publication number	US-11958059-B2
Application number	US-202117399362-A
Country	US
Kind code	B2
Filing date	Aug 11, 2021
Priority date	Aug 14, 2020
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

Provided is an electrostatic dust filter including a frame that is opened back and forth and forms a space through which air passes, a chemical absorbent that is accommodated in the space and absorbs harmful substance in the air, a mesh member that covers the front of the frame and has a plurality of pores through which the air passes, a ground electrode that covers the rear of the frame and has the plurality of pores through which the air passes, and is grounded, and a voltage electrode that is disposed to opposite to the ground electrode with respect to the mesh member and applied with a high voltage.

First claim

What is claimed is:

1. An electrostatic dust filter, comprising:
a frame that is opened back and forth and forms a space through which air passes;
a chemical absorbent that is accommodated in the space and absorbs a harmful substance in the air;
a mesh member that covers a front of the frame and has a plurality of pores through which the air passes;
a ground electrode that covers a rear of the frame, has a plurality of pores through which the air passes, and is grounded; and
a voltage electrode that is disposed opposite to the ground electrode with respect to the mesh member and is applied with a high voltage,
wherein:
the frame is formed in a cylindrical shape, and the space is arranged in a circumferential direction,
the voltage electrode has a ring shape extending in the circumferential direction along a circumference of the frame,

the ground electrode covers an inner circumferential surface of the frame, and
the mesh member covers an outer circumferential surface of the frame.

2. The electrostatic dust filter of claim 1 , wherein the frame includes:
an outer frame that forms a border of the frame; and
an inner frame that partitions the space provided inside the outer frame into a plurality of pieces.

3. The electrostatic dust filter of claim 2 , further comprising:
a filter casing that forms an inlet communicating with the space, and is recessed in a shape corresponding to the outer frame so that the outer frame is inserted, into the filter casing,
wherein the voltage electrode is disposed at the inlet and fixed to the filter casing.

4. The electrostatic dust filter of claim 3 , wherein the voltage electrode is elongated and provided in plurality, and the plurality of voltage electrodes are arranged parallel to each other and disposed parallel to the ground electrode.

5. The electrostatic dust filter of claim 2 , wherein the voltage electrode is provided in plurality, and the plurality of voltage electrodes are arranged parallel to each other.

6. The electrostatic dust filter of claim 1 , further comprising:
a filter casing that is arranged in a circumferential direction to form a plurality of inlets communicating with the space, wherein the filter casing is fixed to the voltage electrode.

7. The electrostatic dust filter of claim 6 , wherein the filter casing includes a plurality of casing inner frames extending in an axial direction between the plurality of inlets and arranged in the circumferential direction, and
the voltage electrode is fixed to the plurality of casing inner frames.

8. The electrostatic dust filter of claim 1 , wherein the ground electrode and the mesh member have a mesh shape in which the plurality of pores of the ground electrode and the mesh member are formed smaller than a size of the chemical absorbent.

Assignees

• Lg Electronics Inc

Inventors

• Park Minjae
• Park Chulwoo
• Son Ilna

Classifications

• B03C3/155 Primary

  Filtration · CPC title

• B03C3/08 Primary

  characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream · CPC title

• B03C3/12

  characterised by separation of ionising and collecting stations · CPC title

• B03C3/41

  Ionising-electrodes · CPC title

• B03C2201/14

  the gas being moved electro-kinetically · CPC title