Elevator cab air purification

Patent metadata

Field	Value
Publication number	US-11898776-B2
Application number	US-202016994884-A
Country	US
Kind code	B2
Filing date	Aug 17, 2020
Priority date	Aug 17, 2020
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

An illustrative example embodiment of an elevator cab air purification device includes a housing having an inlet, an outlet, and at least one air pathway between the inlet and the outlet. A fan module is situated to cause air flow into the housing through the inlet, through the housing, and out of the housing through the outlet. The air flow through the housing includes air flow along the at least one pathway in at least a first direction. An air purifier is situated within the housing and configured to purify air that flows along the at least one pathway before the air exits the housing through the outlet.

First claim

We claim:

1. An elevator cab air purification device, comprising:
a housing including an inlet, an outlet, and a plurality of air pathways between the inlet and the outlet;
a fan module that is situated to cause air flow into the housing through the inlet, through the housing, and out of the housing through the outlet, wherein the air flow through the housing includes air flow along at least one of the plurality of air pathways in a first direction and air flow along at least one other of the plurality of air pathways in a second direction that is opposite the first direction;
an air purifier comprising at least one source of radiation situated within the housing along a substantial length of the plurality of air pathways and configured to purify air that flows along the plurality of air pathways to thereby purify the air before the air exits the housing through the outlet,

wherein
an elevator cab includes a plurality of vertically oriented walls between a floor and a ceiling,
the elevator cab has a plurality of aesthetic raised panels on the plurality of vertically oriented walls and the housing is configured as one of the plurality of aesthetic raised panels, and
the housing is situated parallel to and against at least one of the plurality of vertically oriented walls along a substantial portion of a distance between the floor and the ceiling;
wherein the housing includes a plurality of baffles that define the plurality of air pathways within the housing, and wherein the plurality of baffles are spaced apart from each other in a direction across a width of the at least one of the plurality of vertically oriented walls such that the plurality of air pathways comprise a series of vertical air pathways that each extend along the substantial portion of the distance between the floor and the ceiling;
wherein the fan module comprises a plurality of fans, and wherein the series of vertical air pathways comprise at least five vertical air pathways; and
wherein a first fan of the plurality of fans is located in a first vertical air pathway of the at least five vertical air pathways adjacent to the inlet; and
a second fan of the plurality of fans is located in a transition between a second vertical air pathway and a third vertical air pathway of the at least five vertical air pathways; and
a third fan of the plurality of fans is located in a transition between a fourth vertical air pathway and a fifth vertical air pathway of the at least five vertical air pathways.

2. The device of claim 1 , wherein the at least one source of radiation comprises a strip of lights that emit ultraviolet light, and each strip of lights extends along a substantial length of each air pathway.

3. The device of claim 1 , wherein the first direction corresponds to air flow away from the ceiling and toward the floor, and the second direction corresponds to air flow away from the floor and toward the ceiling.

4. The device of claim 1 , wherein the at least one of the plurality of vertically oriented walls includes a pair of aesthetic raised panels from the plurality of aesthetic raised panels, and wherein the housing comprises at least one aesthetic raised panel from the pair of aesthetic raised panel, and wherein the distance between the floor and the ceiling for the at least one of the plurality of vertically oriented walls comprises a wall height and wherein the at least one of the plurality of vertically oriented walls has the wall width, and wherein the pair of aesthetic raised panels is situated along a substantial portion of the wall width.

5. A method of purifying air in an elevator cab using a housing including an inlet, an outlet, and a plurality of air pathways between the inlet and the outlet, wherein the elevator cab includes a plurality of vertically oriented walls between a floor and a ceiling, the housing is situated parallel to and against at least one of the plurality of vertically oriented walls along a substantial portion of a distance between the floor and the ceiling, the method comprising:
causing air flow into the housing through the inlet, through the housing, and out of the housing through the outlet, wherein the air flow through the housing includes air flow along one of the plurality of air pathways in a first direction and air flow along another one of the plurality of air pathways in a second direction that is opposite the first direction, and wherein causing the air flow comprises using a fan module comprising a plurality of fans; and
purifying air that flows along the plurality of air pathways by irradiating the air along a substantial length of the plurality of air pathways, respectively, before the air exits the housing through the outlet, and wherein air is purified via an air purifier comprising a radiation strip that extends from a first end of one of the air pathways adjacent a fan of the plurality of fans at the inlet and towards a second end of the one of the air pathways adjacent the outlet: and
wherein the elevator cab has a plurality of aesthetic raised panels on the plurality of vertically oriented walls and the housing is configured as one of the plurality of aesthetic raised panels;
wherein the housing includes a plurality of baffles that define the plurality of air pathways within the housing, and wherein the plurality of baffles are spaced apart from each other in a direction across a width of the at least one of the plurality of vertically oriented walls such that the plurality of air pathways comprise a series of vertical air pathways that each extend along the substantial portion of the distance between the floor and the ceiling, and
wherein the series of vertical air pathways comprise at least five vertical air pathways, and wherein:
a first fan of the plurality of fans is located in a first vertical air pathway of the at least five vertical air pathways adjacent to the inlet:
a second fan of the plurality of fans is located in a transition between a second vertical air pathway and a third vertical air pathway of the at least five vertical air pathways;

wherein the fan module comprises the first fan of the plurality of fans that is situated in the first vertical air pathway of the series of vertical air pathways;
the second fan of the plurality of fans is situated in the second vertical air pathway of the series of vertical air pathways: and
a third fan of the plurality of fans is located in a transition between a fourth vertical air pathway and a fifth vertical air pathway of the at least five vertical air pathways.

6. The method of claim 5 , wherein irradiating the air comprises exposing the air to ultraviolet light, and wherein the radiation strip comprises a flexible ribbon made of a silicone material that supports a plurality of LEDs that emit ultraviolet light along a corresponding pathway.

7. The method of claim 5 , wherein the first direction corresponds to air flow away from the ceiling and toward the floor, and the second direction corresponds to air flow away from the floor and toward the ceiling.

8. The method of claim 5 , wherein the at least one of the plurality of vertically oriented walls includes a pair of aesthetic raised panels from the plurality of aesthetic raised panels, and wherein the housing comprises at least one aesthetic raised panel from the pair of aesthetic raised panel, and wherein the distance between the floor and the ceiling for the at least one of the plurality of vertically oriented walls comprises a wall height and wherein the at least one of the plurality of vertically oriented walls has the wall width, and wherein the pair of aesthetic raised panels is situated along a substantial portion of the wall width.

9. An elevator cab, comprising:
a floor;
a ceiling;

Assignees

• Otis Elevator Co

Inventors

• Derwinski Patricia
• Castro Inzunza Cuauhtemoc

Classifications

• F24F8/22 Primary

  using UV light · CPC title

• F24F7/003

  in combination with air cleaning · CPC title

• F24F3/167

  Clean rooms, i.e. enclosed spaces in which a uniform flow of filtered air is distributed (air distribution by perforated walls F24F7/10) · CPC title

• F24F7/007 Primary

  with forced flow (using ducting systems F24F7/06) · CPC title

• F24F8/192

  by electrical means, e.g. by applying electrostatic fields or high voltages · CPC title