To provide an expiration date notifying device of filter means in a compressed-air purification system, that is capable of reliably and correctly notifying an operator of arrival of time when the filter means should be exchanged.
An expiration date notifying device of filter means includes: detection means disposed on a downstream side beyond the filter means and outputting a distribution signal every time purified compressed air is distributed; calculation means for successively accumulating duration time of the distribution signal and calculating a total distribution time of the compressed air; determination means for outputting an expiration date arrival signal when the total distribution time of the compressed air reaches a pre-set serviceable time of the filter means; and notifying means for notifying an operator that an expiration date of the filter means has arrived, by using the expiration date arrival signal.
NAKANISHI TAKAYOSHI
KATO TAKAYUKI
Masahiro Nakashima