Air-conditioning apparatus

An air-conditioning apparatus comprising:

• a communication unit configured to receive a radio signal from a portable terminal;
• a sensor configured to detect detailed information that includes information indicating presence or absence of a person in a detection target region that is a target region for detection of whether a person is present or not;
• and
• a controller configured to
• determine whether the communication unit receives a radio signal having a radio field intensity higher than or equal to a predetermined radio field intensity for triggering sensor operation and whether a detection process by the sensor to detect the detailed information is in a stopped state,
• responsive to determining that the radio signal having the radio field intensity is received and that the detection process is in the stopped state, cause the sensor to start the detection process to detect the detailed information and control an air-conditioning operation based on the detailed information detected by the sensor,
• wherein the radio signal includes an identification code that identifies the portable terminal on a transmission side that transmits the radio signal,
• after causing the sensor to start the detection process, derive a number of persons in the detection target region, from at least one of (i) one or more identification codes included in one or more radio signals received by the communication unit, and (ii) the detailed information detected by the sensor, and
• control the air-conditioning operation based on the number of persons in the detection target region.