Air-cleaning device

An air-cleaning device mounted with a person detection sensor that detects motion of a person and an illuminance sensor that detects brightness in a room, the air-cleaning device comprising:

• a first determination unit that determines, from a detection signal from the person detection sensor, whether a state of an air-cleaning target room is at least any of a state where a person is absent in the air-cleaning target room, a state where a person is present in the air-cleaning target room and a motion amount is small, and a state where a person is present in the air-cleaning target room and the motion amount is large;
• a second determination unit that determines, from a detection signal from the illuminance sensor, whether the state of the air-cleaning target room is at least any of a state where it is bright inside the air-cleaning target room and a state where it is dark inside the air-cleaning target room;
• an operation control unit that controls an operation of an air-cleaning function by using determination results of the first determination unit and the second determination unit;
• a sound output unit that produces a speech content associated with a device state indicating a state of the air-cleaning device;
• a device state detection unit that detects the device state;
• a speech content extraction unit that extracts the speech content associated with the device state detected by the device state detection unit;
• and
• a speech control unit that causes the sound output unit to output, as sound, the speech content extracted by the speech content extraction unit, wherein
• the person detection sensor detects motion of a person in a predetermined range of the air-cleaning device,
• the illuminance sensor detects illuminance around the air-cleaning device,
• the speech control unit performs control about whether or not to cause the sound output unit to output the sound in accordance with detection results of the person detection sensor and the illuminance sensor, and
• when brightness equal to or more than predetermined brightness is detected by the illuminance sensor after predetermined time has lapsed in a state where darkness equal to or more than predetermined darkness is detected by the illuminance sensor and motion of a person is detected by the person detection sensor, the speech control unit causes the sound output unit to output the sound.