# US 2021/0276401 A1 · Vehicle cabin filter assembly

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- Number: US 2021/0276401 A1
- Document ID: US20210276401A1
- Status: Published application
- Kind: A1
- Application number: 17/258,007
- Filed: 2019-07-05
- Published: 2021-09-09
- Earliest claimed: 2018-07-06
- Assignees: Dyson Technology Limited
- Applicants: Dyson Technology Limited
- Inventors: Daniela STIEHLER; James Sebastian HARDING; Timothy James GODFREY
- Web page: https://patentgrep.com/patent/US20210276401A1

## CPC

- B60H 3/06: Filtering
- B01D 46/0036: {by adsorption or absorption}
- B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D 46/522: {with specific folds, e.g. having different lengths}
- B01D 46/62: connected in series
- B01D 53/0407: {Constructional details of adsorbing systems}
- B01D 2257/708: Volatile organic compounds V.O.C.'s
- B01D 2259/4566: for use in transportation means
- B01D 2267/40: Different types of filters
- B01D 2279/40: for cleaning of environmental air, e.g. by filters installed on vehicles or on streets
- B60H 3/0641: {near ventilating openings in the vehicle exterior}
- B60H 2003/065: {Details for holding filter elements in position}
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- 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 vehicle cabin filter assembly comprising a filter module and a further filter module positioned downstream of the filter module. Each filter module comprises one or more filter elements. The filter elements of the filter module are pleated at a first pleat pitch and comprise a gas filter element. The filter elements of the further filter module are pleated at a second pleat pitch and comprise a particulate filter element. And the second pleat pitch is smaller than the first pleat pitch.

## Claims

### Claim 1

A vehicle cabin filter assembly comprising:
a filter module; and
a further filter module positioned downstream of the filter module, wherein:
each filter module comprises one or more filter elements,
the filter elements of the filter module are pleated at a first pleat pitch and comprise a gas filter element,
the filter elements of the further filter module are pleated at a second pleat pitch and comprise a particulate filter element, and
the second pleat pitch is smaller than the first pleat pitch.

### Claim 2 (depends on 1)

The filter assembly of claim 1, wherein the first pleat pitch is between 5 and 9 mm, and the second pleat pitch is between 2 and 5 mm.

### Claim 3 (depends on 1)

The filter assembly of claim 1, wherein the filter elements of the filter module comprise a particulate filter element positioned upstream of the gas filter element.

### Claim 4 (depends on 3)

The filter assembly of claim 3, wherein the filter elements of the filter module comprise a further particulate filter element positioned downstream of the gas filter element.

### Claim 5 (depends on 4)

The filter assembly of claim 4, wherein the further particulate filter element has a separation efficiency higher than that of the particulate filter element of the filter module.

### Claim 6 (depends on 1)

The filter assembly of claim 1, wherein the gas filter element comprises granules of an adsorbent.

### Claim 7 (depends on 1)

The filter assembly of claim 1, wherein the filter elements of the filter module comprise a particulate filter element, and the further filter module has a separation efficiency higher than that of the filter module.

### Claim 8 (depends on 1)

The filter assembly of claim 1, wherein the filter assembly comprises an additional filter module positioned upstream of the filter module, the additional filter module comprises one or more filter elements, the filter elements of the additional filter module comprise a particulate filter element, and the additional filter module has a separation efficiency lower than that of the filter module.

### Claim 9 (depends on 8)

The filter assembly of claim 8, wherein the filter elements of the additional filter module comprise a further particulate filter element positioned downstream of the particulate filter element, and the further particulate filter element has a separation efficiency higher than that of the particulate filter element of the additional filter module.

### Claim 10 (depends on 8)

The filter assembly of claim 8, wherein the filter elements of the additional filter module are non-pleated.

### Claim 11 (depends on 1)

The filter assembly of claim 1, wherein the filter elements of the further filter module provide HEPA-grade filtration.

### Claim 12 (depends on 1)

A vehicle comprising a cabin, an air duct assembly through which air is drawn and discharged into the cabin, and the filter assembly of claim 1, wherein the filter assembly is mounted within the air duct assembly and filters the air.