| 摘要 |
PROBLEM TO BE SOLVED: To provide a sprayer capable of highly accurately and stably spraying a chemical agent liquid over the spraying volume range from a small volume to a large volume. SOLUTION: In this sprayer, a shutter-receiving portion 25 is formed between a chemical agent tank 1 and a blower case 2, and a composite shutter device comprising a rotary shutter portion 47 and a damper shutter portion 48 is disposed in the shutter-receiving portion 25. Therein, a slit 63 is formed. The slit 63 enables an air flow to be generated between a damper shutter 52 and a shutter upper plate 15 on the damper shutter 52, when the damper shutter 48 is opened.
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