| 摘要 |
The invention relates first of all to a dispenser (1) for discharging an in particular granular or powdery substance (2) by blow-out, with a blow-out duct, and with a suction line (5) opening into the blow-out duct (4) for sucking the substance (2) into the blow-out duct (4). In order to provide a dispenser of this kind that permits such a use in a reliable way and by simple means, particularly in manual operation, it is proposed that a positive air pressure can be built up in a duct section (7) arranged upstream of the blow-out duct (4) and closed in the direction of the blow-out duct (4) by a valve (6) opening in a pressure-dependent manner, for pressure-controlled formation of a blow-out stream in the blow-out duct (4). The invention also relates to a method for emptying a substance reservoir having a freeze-dried substance. In order to provide a method of this kind that permits such a use in a reliable way and by simple means, it is proposed that the substance is sucked out of the substance reservoir, by means of a suction air stream opening into a blowing stream, and discharged. The invention further relates to a use of a sucking/blowing dispenser for emptying a substance reservoir having a freeze-dried substance. |
