| 摘要 |
For determining the exhaustion of a filter cartridge (8) according to the time elapsed since its activation, by means of a timer (15) and a control unit (16) associated therewith an operating time (TO) of useful life of the cartridge is calculated starting from its activation, and the calculating of a pause time (TP) is activated according to each pause in use of the cartridge (8) during the operating time (TO) in order to incorporate the calculating of the operating time with a recovery time determined according to the pause time (TP) calculated.
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