# US 10,478,767 B2 · Air purification methodology and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,478,767 B2 - Document ID: US10478767B2 - Status: Granted - Kind: B2 - Application number: 15/436,744 - Filed: 2017-02-17 - Published: 2018-08-09 - Granted: 2019-11-19 - Earliest claimed: 2016-01-27 - Assignees: Yi Fang - Applicants: Yi Fang - Inventors: Yi Fang - Web page: https://patentgrep.com/patent/US10478767B2 ## CPC - B01D 47/021: {by bubbling the gas through a liquid bath} - B01D 2247/08: Means for controlling the separation process - B01D 2247/12: Fan arrangements for providing forced draft - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract A method of air purification and apparatus uses thorough air-bath to trap airborne debris and gaseous molecules in the liquid. Incoming air are reduced repeatedly and thoroughly at various stages into tiny air bubbles in contact with liquid in the apparatus where airborne materials and gaseous molecules are trapped in the liquid. This cleaning system can effectively remove small or large airborne debris and gaseous molecules, in contrast to cleaning effectiveness limited by the filter pore sizes in traditional filter system. The liquid can be water, water mixed with any designed substances or other type of liquid phase of materials. In exemplary case, water is used as a part of filtration medium, the apparatus thus can be served as both air purifier and humidifier. A relatively high humidity in the air would help to trap more airborne debris, which makes the air purification apparatus more efficient. ## Claims ### Claim 1 An air purification apparatus, comprising: a water tank to hold water; a first stage air bubble size reduction module integrated with a bottom of the water tank and designed to reduce air bubble sizes of air entering to the water held in the water tank; an electrical blower coupled to the first stage air bubble size reduction module and configured to inject the air into the water tank starting with reduced air bubble sizes; and a second stage air bubble size reduction module disposed in said water tank to further reduce the air bubble sizes of the air in the water inside of the water tank. ### Claim 2 (depends on 1) The air purification apparatus of claim 1, further comprising a third stage air bubble size reduction module disposed within said water tank located between the second air bubble size reduction module and the first stage air bubble size reduction module wherein said third stage air bubble size reduction module crushes and reduces the air bubble sizes of the air contained in said water tank. ### Claim 3 (depends on 1) The air purification apparatus of claim 1, wherein the first stage air bubble size reduction module includes a hollow chamber having a top plate; and the top plate comprising a plurality of openings for introducing air from said electrical blower to form air bubbles. ### Claim 4 (depends on 3) The air purification apparatus of claim 3, wherein the hollow chamber is connected to the electrical blower through a pipe configured inside the water tank. ### Claim 5 (depends on 3) The air purification apparatus of claim 3, wherein the hollow chamber includes a bottom plate as a common bottom plate of the water tank. ### Claim 6 (depends on 3) The air purification apparatus of claim 3, wherein the openings in the top plate comprising different sized openings. ### Claim 7 (depends on 1) The air purification apparatus of claim 1, wherein said first stage air bubble size reduction module comprising a spiral pipe structure with multiple spiral-curved pipes, wherein each pipes comprising a plurality of openings with same or different sized openings. ### Claim 8 (depends on 1) The air purification apparatus of claim 1, wherein said first stage air bubble size reduction module includes a linking pipe array comprising multiple pipes where each of said pipes include a plurality of the same size or varied sized openings on the surface of said pipes. ### Claim 9 (depends on 1) The air purification apparatus of claim 1, further comprising a meshed plate integrated on top of the water tank, located above the water level surface, wherein said meshed plate comprises openings for the air to escape from said water tank and for catching water droplets splashed from said water tank. ### Claim 10 (depends on 9) The air purification apparatus of claim 9, wherein the water tank further includes a water inlet located lower than said integrated plate. ### Claim 11 (depends on 1) The air purification apparatus of claim 1, wherein said second stage air bubble size reduction module comprises a horizontally disposed plate comprising a plurality of the same size or different sized openings. ### Claim 12 An air purification apparatus, comprising: a water tank to hold water; a first stage air bubble size reduction module integrated with a bottom of the water tank and designed to reduce air bubble sizes of air entering to the water held in the water tank; an electrical blower coupled to the first stage air bubble size reduction module and configured to inject the air into the water tank starting with reduced air bubble sizes; and a second stage air bubble size reduction module submerged within said water tank to reduce the air bubble sizes of the air; and wherein the first stage air bubble size reduction module includes a crushing structure selected from the group consisting of a hollow chamber with a top plate, a spiral pipe structure including a plurality of spiral pipes and a linking pipe array including a plurality of linking pipes; wherein said crushing structure comprise a plurality of openings. ### Claim 13 (depends on 12) The air purification apparatus of claim 12, further comprising a third stage air bubble size reduction module disposed within said water tank located between the second air bubble size reduction module and first stage air bubble size reduction module wherein said third stage air bubble size reduction module further reduces the air bubble sizes of the air contained in said water tank. ### Claim 14 (depends on 12) The air purification apparatus of claim 12, wherein the openings are varied sized or the same size. ### Claim 15 (depends on 12) The air purification apparatus of claim 12, further comprising a mesh plate integrated with the top of the water tank at a slight angle to permit air to escape from said water tank and to capture water drops from said water tank. ### Claim 16 (depends on 12) The air purification apparatus of claim 12, further comprising an air outlet located above said meshed plate and further comprising a solid plate cover said water tank. ### Claim 17 (depends on 12) The air purification apparatus of claim 12, wherein said water tank further comprises a water inlet configured within said water tank below said meshed plate. ### Claim 18 A method for air purification, comprising the steps of: (a) filling a tank with water through a water inlet; (b) driving air, by an electrical air blower, into a first stage air bubble size reduction module integrated at a bottom of said tank; (c) injecting the air into the water through a plurality of openings of the first stage air bubble size reduction module, thereby generating small air bubbles injecting into the water to increase water-air contact surface to capture contaminants in the air while being passed through the water tank; (d) reducing and crushing the air bubbles sizes further of the air contained in said water tank by a second stage of air bubble size reduction module submerged within said water tank to capture remaining contaminants in the air while being passed through said water tank; (e) reducing and crushing the air bubbles sizes of the air contained in said water tank by a third stage of air bubble size reduction module disposed within said water tank located between the second air bubble size reduction module and the first stage air bubble size reduction module to increase water-air contact surface to capture contaminants in the air while being passed through said water tank.