APPLIANCE CONTROL SYSTEM

1 . An appliance control system comprising:

a control device;

a human detection sensor; and

a manual operation switch,

wherein said control device includes:

a controlling unit configured to control an appliance;

a selecting unit configured to select a mode of said controlling unit from an operation mode in which said controlling unit operates the appliance, a limited mode in which said controlling unit limits an operation of the appliance, and a rest mode in which said controlling unit terminates the operation of the appliance;

a manual operation accepting unit configured to select one from an on-signal and an off-signal in accordance with manual operation of said manual operation switch and output selected one to said selecting unit; and

a timer unit, and

said human detection sensor is located in a place where the appliance is installed, said human detection sensor being configured to output a detection signal to said selecting unit in response to human detection, and

said selecting unit includes an identifying module, a changing module, and a judging module, and

said identifying module is configured to identify the current mode of said controlling unit, and

said changing module is configured to, upon receiving the on-signal from said manual operation accepting unit, change said controlling unit to the operation mode and send a judgment start message to said judging module, and

said judging module is configured to start a judgment process in response to receipt of the judgment start message, said judging module being configured to, in the judgment process, control said timer unit in such a manner to count up judgment time, and said judging module being configured to, upon receiving the detection signal from said human detection sensor before the judgment time exceeds waiting time, output a presence signal to said judging module, and to, upon not receiving the detection signal from said human detection sensor before the judgment time exceeds the waiting time, output an absence signal to said judging module, and

said changing module is configured to, upon receiving the absence signal from said judging module while an identification result of said identifying module indicates the operation mode, change said controlling unit to the limited mode and send the judgment start message to said judging module, and

said changing module is configured to, upon receiving the presence signal from said judging module while the identification result of said identifying module indicates the limited mode, change said controlling unit to the operation mode and send the judgment start message to said judging module, and

said changing module is configured to, upon receiving the off-signal from said manual operation accepting unit, change said controlling unit to the rest mode and send a judgment stop message to said judging module, and

said judging module is configured to not perform the judgment process until receiving the judgment start message once receiving the judgment stop message, and

said changing module is configured to, upon receiving the absence signal from said judging module while the identification result of said identifying module indicates the limited mode, change said controlling unit to the rest mode and send the judgment stop message to said judging module.

2 . An appliance control system as set forth in claim 1 , wherein

said limited mode includes a low consumption mode in which said controlling unit operates the appliance at a power consumption lower than that in the operation mode and a waiting mode in which said controlling unit terminates the operation of the appliance, and

said changing module is configured to, upon receiving the absence signal from said judging module while the identification result of said identifying module indicates the operation mode, change said controlling unit to the low consumption mode and send the judgment start message to said judging module, and

said changing module is configured to, upon receiving the presence signal from said judging module while the identification result of said identifying module indicates the low consumption mode, change said controlling unit to the operation mode and send the judgment start message to said judging module, and

said changing module is configured to, upon receiving the absence signal from said judging module while the identification result of said identifying module indicates the low consumption mode, change said controlling unit to the waiting mode and send the judgment start message to said judging module, and

said changing module is configured to, upon receiving the absence signal from said judging module while the identification result of said identifying module indicates the waiting mode, change said controlling unit to the rest mode and send the judgment stop message to said judging module.

3 . An appliance control system as set forth in claim 2 , wherein

said changing module is configured to, upon receiving the presence signal from said judging module while the identification result of said identifying module indicates the waiting mode, change said controlling unit to the low consumption mode and send the judgment start message to said judging module.

4 . An appliance control system as set forth in claim 2 , wherein

said appliance control system further comprises an alarm, and

said changing module is configured to, upon receiving the absence signal from said judging module while the identification result of said identifying module indicates the low consumption mode, send an alarming start message to said alarm before changing said controlling unit to the waiting mode, and

said alarm is configured to, in response to receipt of the alarming start message, announce that the appliance is going to be turned off.