| 摘要 |
A device adapted to disseminate one of a plurality of volatile liquids into an enclosed atmosphere, the device comprising (i) an enclosure (1) within which is defined a plurality of separate compartments (3,4), each compartment having at least one inlet and at least one outlet port (10, 9), and within the compartment, a source of volatile liquid (5), (ii) a source of forced air current external to the compartments and adapted to blow air through them into the atmosphere; characterised in that the device additionally comprises automatic liquid regulating means in the form of paired port closures (11, 12) for both inlet and outlet ports of each compartment, slidable between a number of inlet and outlet port-closing rest positions equal to the number of compartments, such that, in any rest position, the inlet and outlet ports of only one compartment are open.
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