Abstract: A ventilation device to be installed outdoors, includes: an air supply fan; an exhaust fan; a heat exchanger; and a casing having an accommodation space that accommodates the air supply fan, the exhaust fan, and the heat exchanger. The casing includes: a partition defining a lower end of the accommodation space and including a first outside air intake port and a first exhaust port each passing through the partition in an up-and-down direction; a bottom plate; an outside air intake chamber defined between the bottom plate and the partition disposed above the bottom plate and that communicates with the first outside air intake port; an exhaust chamber defined between the bottom plate and the partition and that communicates with the first exhaust port; and side plates.

Abstract: An indoor unit in an air conditioner configured to condition air in an indoor space includes: a casing that includes an intake port opened downward toward the indoor space; a fan configured to suck air in the indoor space into the casing via the intake port; a collector configured to collect dust contained in the air sucked via the intake port; a light source configured to irradiate an upstream side of the collector in an air flow direction with ultraviolet rays; a shield configured to block the ultraviolet rays from the light source toward the intake port; and a protecting member having a mesh shape and covering the intake port at a position upstream of the collector in the air flow direction.

Abstract: A ventilation device to be installed outdoors, includes: an air supply fan; an exhaust fan; a heat exchanger; and a casing having an accommodation space that accommodates the air supply fan, the exhaust fan, and the heat exchanger. The casing includes: a partition defining a lower end of the accommodation space and including a first outside air intake port and a first exhaust port each passing through the partition in an up-and-down direction; a bottom plate; an outside air intake chamber defined between the bottom plate and the partition disposed above the bottom plate and that communicates with the first outside air intake port; an exhaust chamber defined between the bottom plate and the partition and that communicates with the first exhaust port; and side plates.