| CPC A61L 2/10 (2013.01) [A61L 2/24 (2013.01); A61L 2202/14 (2013.01)] | 13 Claims |
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1. A UV emission device comprising:
an irradiator that irradiates a predetermined irradiation area in a predetermined space with ultraviolet rays in accordance with a stored total exposure amount of an identified target person; and
a processing device that
controls the irradiator based on the stored total exposure amount of the identified target person to ultraviolet rays;
performs a determination process of determining whether or not a target person is present in the irradiation area, the determiner identifying the target person determined to be present in the irradiation area as the identified target person;
outputs an amount of exposure of the identified target person to ultraviolet rays based on a determination result of the determiner and operation information on the irradiator; and
adds the amount of exposure of the ultraviolet rays to the stored total exposure amount of ultraviolet rays in order to provide an updated stored total exposure amount, so as to control the irradiator such that,
in a case where the irradiation area in which the identified target person is present is irradiated with ultraviolet rays, the processing device controls the irradiator so as to limit an irradiation intensity of ultraviolet rays, so as to limit an irradiation time of ultraviolet rays while keeping the irradiation intensity of ultraviolet rays at a same level, or so as to limit both the irradiation intensity of ultraviolet rays and the irradiation time of ultraviolet rays, as compared to a case where the irradiation area in which the identified target person is not present is irradiated with ultraviolet rays, thereby controlling the irradiator so that the updated stored total exposure amount of the identified target person to ultraviolet rays is less than or equal to a predetermined permissible amount.
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