# US 9,433,227 B2 · Filtration system

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- Number: US 9,433,227 B2
- Document ID: US9433227B2
- Status: Granted
- Kind: B2
- Application number: 14/863,728
- Filed: 2015-09-24
- Published: 2016-03-17
- Granted: 2016-09-06
- Earliest claimed: 2012-08-03
- Assignees: Pace International, LLC
- Applicants: Pace International, LLC
- Inventors: Robert Scott Fassel; Scott Aaron Christie
- Web page: https://patentgrep.com/patent/US9433227B2

## CPC

- A23B 7/152: in a controlled atmosphere comprising other gases in addition to CO2, N2, O2 or H2O {; Elimination of such other gases}
- A01N 43/54: 1,3-Diazines; Hydrogenated 1,3-diazines
- A23B 2/00: Preservation of foods or foodstuffs, in general
- A23B 2/721: in a controlled atmosphere comprising other gases in addition to CO2, N2, O2 or H2O
- A23B 7/00: Preservation of fruit or vegetables; Chemical ripening of fruit or vegetables
- A23B 7/153: in the form of liquids or solids
- B01D 46/00: Filters or filtering processes specially modified for separating dispersed particles from gases or vapours (filtering elements B01D24/00-B01D35/00; filtering material B01D39/00; their regeneration outside the filters B01D41/00)
- B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D 46/521: {using folded, pleated material}
- B01D 46/58: connected in parallel
- B01D 46/62: connected in series
- B01D 50/00: Combinations of methods or devices for separating particles from gases or vapours
- A23V 2002/00: Food compositions, function of food ingredients or processes for food or foodstuffs
- B01D 2267/30: Same type of filters
- B01D 2279/35: for venting arrangements
- A23B: PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- 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)
- A23V: INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION

## Abstract

A filtration system is arranged to safely vent a storage room into which a fog mixture is introduced. Venting the storage room reduces and/or prevents a substantial increase in the internal pressure of the storage room. To control the pressure differential between the storage room and the ambient air pressure, a venting manifold with an in-line duct fan is used, for example, to exhaust storage room air into the atmosphere. The exhausted storage room air is filtered to reduce the exfiltration of chemicals and/or other contaminants from the environmentally sealed storage room.

## Claims

### Claim 1

A method for filtration, comprising:
arranging fruits in a substantially closed room having a volume of air;
introducing pyrimethanil, and optionally, additional treatment substances, into an airstream with a thermofogger gun to generate air-borne treatment substances at a rate of up to 40 cubic feet per minute;
introducing the airstream and the air-borne treatment substances into the volume of air of the substantially closed room to generate the dispersed air-borne substances;
creating with a fan a pressure between −0.15 and 0 inches water column upon a bank of six high particle-rated pleated fiber filters; and
inducing an exhaust air current that flows from the substantially closed room into an exhaust port of the substantially closed room, wherein the exhaust air current includes the air-borne substances from the exhaust port and the filter bank captures around 95 percent of the air-borne treatment substances.

### Claim 2 (depends on 1)

The method of claim 1, wherein ambient air is used as input to the thermofogger gun.

### Claim 3

A method for filtration, comprising:
arranging vegetables in a substantially closed room having a volume of air;
introducing pyrimethanil, and optionally, additional treatment substances, into an airstream with a thermofogger gun to generate air-borne treatment substances at a rate of up to 40 cubic feet per minute;
introducing the airstream and the air-borne treatment substances into the volume of air of the substantially closed room to generate the dispersed air-borne substances;
creating with a fan a pressure between −0.15 and 0 inches water column upon a bank of six high particle-rated pleated fiber filters; and
inducing an exhaust air current that flows from the substantially closed room into an exhaust port of the substantially closed room, wherein the exhaust air current includes the air-borne substances from the exhaust port and the filter bank captures around 95 percent of the air-borne treatment substances.

### Claim 4 (depends on 3)

The method of claim 3, wherein ambient air is used as input to the thermofogger gun.