US 11,788,749 B2
Multi-unit air conditioning system
Maki Sugiyama, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/289,052
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Jan. 31, 2019, PCT No. PCT/JP2019/003398
§ 371(c)(1), (2) Date Apr. 27, 2021,
PCT Pub. No. WO2020/157920, PCT Pub. Date Aug. 6, 2020.
Prior Publication US 2021/0404684 A1, Dec. 30, 2021
Int. Cl. F24F 11/52 (2018.01); F24F 11/32 (2018.01); F24F 11/79 (2018.01); G05B 19/042 (2006.01)
CPC F24F 11/32 (2018.01) [F24F 11/52 (2018.01); F24F 11/79 (2018.01); G05B 19/042 (2013.01); G05B 2219/2614 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A multi-unit air conditioning system, comprising:
an outdoor unit disposed in a first space;
a plurality of indoor units to send an air to at least one second space different from the first space, the plurality of indoor units and the outdoor unit forming a refrigeration cycle; and
a control device to control the plurality of indoor units, wherein
each indoor unit among the plurality of indoor units includes a notification unit, and causes the notification unit of the indoor unit to operate in response to a notification signal from the control device, and transmits to the control device a response signal which includes identification information of the indoor unit, and an operational status of the notification unit of the indoor unit,
an operation of the notification unit can be checked by a user who is in the at least one second space,
when at least one indoor unit included in the plurality of indoor units is malfunctioning, the at least one indoor unit each transmits to the control device a malfunction occurred signal which includes identification information of the indoor unit, and
when the control device cannot check the operation of the notification unit included in each of the at least one indoor unit by a response signal corresponding to the transmitted notification signal, the control device transmits a notification signal to an indoor unit to which a notification signal has not been transmitted among the plurality of indoor units.