Patent ID: 6948194

Claim:
A toilet cleaning device for controlling the opening/closing of a valve provided in cleaning water pipe which enables cleaning water to be supplied to a toilet main body, characterized in comprising: transmission means for transmitting radio waves toward a space in the vicinity of a bowl portion interior space or an opening portion of the bowl portion of a toilet stool; reception means for receiving reflected waves of the radio waves transmitted by said transmission means; a Doppler sensor provided for generating a differential signal corresponding to the difference between the frequency of a signal received by said reception means and the frequency of a signal transmitted by said transmission means; frequency analysis means for analyzing the frequency of the output of said Doppler sensor; liquid flow condition calculation means for calculating the liquid flow condition in the bowl portion interior space based on the output of said frequency analysis means; and control means which perform control of said valve in accordance with the calculation result of said liquid flow condition calculation means; wherein said liquid flow condition calculation means comprise time measuring means for measuring the time period during which it is determined that a liquid flow is present.