| 摘要 |
PROBLEM TO BE SOLVED: To provide an agricultural chemical spray apparatus capable of freely controlling the spray quantity in a wide range while keeping the particle diameter of sprayed particles without changing a spray nozzle. SOLUTION: The agricultural chemical spray apparatus is provided with the spray nozzle 12 capable of spraying an agricultural chemical L intermittently and a control means 30 for controlling the quantity to be sprayed from the spray nozzle 12 by controlling the duty ratio (t/T) of the intermittent spray under a fixed spray pressure. Then, the spray quantity is increased with the increase of a ratio of spraying time (t) to one intermittent spray cycle (T) and is decreased with the decrease of the ratio of the spraying time (t) to one intermittent spray cycle (T). Because the spray pressure is fixed regardless of the change of the spray quantity, problems that the particle diameter of the spray particle S is out of the proper range to be too large or the spray reaching distance becomes extremely short do not occur even if the spray quantity is decreased. COPYRIGHT: (C)2007,JPO&INPIT
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