Abstract: An object of the present invention is to provide an air conditioner for a rail vehicle that is excellent in cleanliness and comfort by cleaning the air conditioner at an appropriate timing without causing discomfort to passengers. An air conditioner for a rail vehicle including a vehicle control system includes: a refrigeration cycle device 3 that can execute a cleaning operation; and an air conditioning control device 4 that controls the refrigeration cycle device, and the air conditioning control device 4 can communicate with the vehicle control system 2 and causes the refrigeration cycle device 3 to execute a cleaning operation on the basis of status information obtained from the vehicle control system 2.

Abstract: Provided is an air conditioning system for a railway vehicle that is of a roof installation type. The air conditioning system includes a heat exchanger through which at least air inside the railway vehicle passes, and an ultraviolet-ray irradiation device. The heat exchanger and the ultraviolet-ray irradiation device are arranged between an upper cover curved in an upwardly protruding shape and a bottom plate. The heat exchanger has an air suction surface arranged so as to be irradiated with ultraviolet rays generated by the ultraviolet-ray irradiation device. A member that does not transmit the ultraviolet rays is arranged on a straight line interconnecting the ultraviolet-ray irradiation device and an interior space of the railway vehicle.