Patent ID: 11898776
Assignee: OTIS ELEVATOR COMPANY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC B  F | IPC F

Claim 0:
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.