# US 2021/0276020 A1 · A Method and an Apparatus for Cleaning the Air

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- Number: US 2021/0276020 A1
- Document ID: US20210276020A1
- Status: Published application
- Kind: A1
- Application number: 17/275,503
- Filed: 2019-09-12
- Published: 2021-09-09
- Earliest claimed: 2018-09-18
- Assignees: Van Wees Innovations B.V.
- Applicants: Van Wees Innovations B.V.
- Inventors: Peter Willem Van Wees
- Web page: https://patentgrep.com/patent/US20210276020A1

## CPC

- B03C 3/155: Filtration
- B03C 3/361: {by static mechanical means, e.g. deflector}
- B03C 3/363: {located before the filter}
- B03C 3/368: {by other than static mechanical means, e.g. internal ventilator or recycler}
- B03C 3/38: Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
- B03C 3/41: Ionising-electrodes
- B03C 3/0175: {Amassing particles by electric fields, e.g. agglomeration}
- B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B)

## Abstract

The present invention relates to a method and an apparatus for cleaning outside or inside air that is polluted by solid particles. The method comprises a specific sequence of measures for promoting agglomeration and/or coagulation of the particles, including ionization, followed by a series of filtrations. This lead to a surprising removal of ultra-fine particles of 1-100 μm with a great efficiency. The invention includes an apparatus for the application of the method.

## Claims

### Claim 1

A method for the removal of solid particles from air the method comprising:
blowing the air through a channel in which particles in the air are ionized;
slowing down the air speed;
filtering the air with a filter;
blowing the air that was filtered by the filter through an electrically charged filter unit that comprises one or more filters from classes G1, G2 or G3,
wherein the air that was filtered by the electrically charged filter unit is subsequently forced to flow to and through a class U15 filter.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the air blown through the channel comprises outside air.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the particles in the air are ionized by DC ionization.

### Claim 4 (depends on 3)

The method according to claim 3, wherein the electrically charged filter unit is charged with an opposite polarity of a polarity of a charge of the particles in the air that are ionized.

### Claim 5 (depends on 1)

An apparatus for the application of the method for the removal of solid particles from the air according to claim 1, the apparatus comprising an air inlet, a first air channel with an upstream end, a fan located at the upstream end of said first air channel, an ionizer, a diffuser, a second air channel, a filter, an electrically charged filter unit comprising one or more filters from the classes G1, G2 and/or G3, and a class U15 filter downstream of the electrically charged filter unit.

### Claim 6 (depends on 5)

The apparatus according to claim 5, wherein the apparatus further comprises a compression section.

### Claim 7 (depends on 1)

The method according to claim 1, wherein the step of slowing down the air speed comprises slowing down the air speed through a diffuser.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the step of filtering the air is performed with a class F9 filter.

### Claim 9 (depends on 5)

The apparatus of claim 5, wherein the filter comprises a class F9 filter.