Patent ID: 8249751

Claim:
An air-conditioning system having a plurality of air conditioners: each air conditioner comprising; an indoor unit arranged with a human detection sensor for detecting a human motion in an air-conditioning target space and an inlet temperature sensor for detecting an inlet temperature of the indoor unit; a compressor controlling an efficiency of heat exchange of a heat exchanger installed in the indoor unit; a remote controller for starting and stopping an operation of the air conditioner and setting a preset temperature; and a control unit for driving and controlling the compressor, on the basis of information regarding the starting and stopping of the operation and the preset temperature set by the remote controller and detection information obtained by the inlet temperature sensor and the human detection sensor, wherein the indoor units of the plurality of air conditioners are installed in the same indoor space, and the control units of the air conditioners are connected by wiring or wirelessly, wherein each of the control units of the plurality of air conditioners can grasp the detection information of the human detection sensor, preset temperature information of the remote controller, and inlet temperature information of the inlet temperature sensor of the other air conditioners in the same space, wherein on the basis of the preset temperature information and inlet temperature information, each of the control units calculates an air-conditioning load of each of the air-conditioning target spaces and an air-conditioning load of an entire air-conditioning space that is a sum of the air-conditioning load of each of the air-conditioning target spaces, the entire air-conditioning space being formed from each of the air-conditioning target spaces and wherein, in a case where the calculated air-conditioning loads in both of the entire air-conditioning space and at least part of the plurality of the air-conditioning target spaces have a margin respectively, the control unit of each of the air conditioners controls and drives each compressor to perform a power-saving operation of the entire air-conditioning space by stopping operation of at least one of the air conditioners, making one or more efficient air conditioners having better operation efficiency than the other air conditioners to preferentially operate, or shifting the preset temperature or the inlet temperature of each of the air conditioners to a side where power consumption is made to be smaller than a current value, within the margins of the air-conditioning loads of the air-conditioning target space and the entire air-conditioning space.