| 摘要 |
<p>A liquid pump (5) and an air compressor (9) supply liquid and air to spraying nozzles (1). Pressure sensors (4, 8) supply signals representing the liquid and air pressures to a control circuit (12), which also receives a signal from a sensor (13, 14) representing sprayer speed. The control circuit (12) controls valves (7, 11) so as to control the pressures of the liquid and air so as to spray a selectable constant amount of liquid per unit area irrespective of sprayer speed with a selectable constant spray quality irrespective of speed.</p> |
