| 摘要 |
An electrical device includes a plurality of filters having filter performances different from each other; a filter switching section which switches a filter to be disposed in a channel of a fluid flowing into a main body of the device between the plurality of filters; a switching control section which controls the filter switching section; and a determining section which determines the type of unwanted matter contained in the fluid. In this arrangement, the switching control section controls the filter switching section to dispose the filter corresponding to the type determined by the determining section in the channel. |
