DROPLET DOSING DEVICE AND DROPLET DOSING INSTALLATION EQUIPPED THEREWITH

摘要

The invention relates to a droplet dosing device, with a source (2) of a medium for spraying, a spray nozzle (5), a channel (4) connecting the source to the spray nozzle, pumping means (6) for carrying the medium for spraying from the source to the spray nozzle, and means for damping a pressure pulse generated by the pumping means, which damping means (10) are operably connected to the pumping means. The pumping means can comprise a member displaceable by a drive element and the damping means can be arranged between the drive element and the displaceable member or between the drive element and a fixed part of the pumping means. The droplet dosing device can further be provided with spring means which are operably connected to the pumping means and which can also be arranged between the drive element and the displaceable member or between the drive element and a fixed part of the pumping means. When the pumping means comprises a displaceable member driven by a piezo-element, the device can be provided with means connected to the piezo-element for amplifying the operation thereof. The invention finally also relates to a droplet dosing installation which consists of a number of droplet dosing devices as described above arranged on a carrier in a determined pattern.