To provide a technique related to a voice interface (I / F) control for operating a thermal appliance by voice.SOLUTION: A control device that controls a voice I / F includes an input I / F that receives an input
signal from the outside, a computing unit that determines, when the input
signal is a voice
signal, whether or not the voice signal represents a prepared operation word, and an output I / F that outputs the
control signal to the outside. The computing unit receives a voice input signal from the input I / F, and outputs, through the output I / F, a
control signal requesting confirmation of execution of the voice command corresponding to a predetermined operation word when the computing unit determines that the signal represents a predetermined operation word. After transmission of the
control signal, a second input signal is received via the input I / F, and when it is determined that the second input signal is an acknowledgment signal confirming the execution of the voice command, the computing unit outputs the control signal to instruct the execution of the voice command through the output I / F.SELECTED DRAWING: Figure 9