Patent ID: 8850870

Claim:
A pressure guiding tube blockage diagnosing device, comprising: a pressure detector detecting, through a pressure guiding tube, a pressure to be measured, wherein there are fluctuations in the pressure; a fluctuation speed detector detecting a speed of the fluctuations based on a pressure value detected by the pressure detector; and an evaluator evaluating a blocked state of the pressure guiding tube based on the speed of the fluctuations, wherein the fluctuation speed detector is provided with a rising/falling frequency detector segmenting a time series of the pressure values detected by the pressure detector into a plurality of intervals and detecting, for each interval, the rising/falling frequency of the fluctuation, or data corresponding to the rising/falling movement frequency, as information indicating the speed of the fluctuations, and the evaluator is provided with a comparator evaluating the state of blockage of the pressure guiding tubes through comparing, to a specific threshold value, the rising/falling frequency of the fluctuation or data corresponding to the rising/falling frequency.