| 摘要 |
PROBLEM TO BE SOLVED: To provide a chemical-spraying device capable of reducing the amount of the waste chemical to avoid the waste by reducing the amount of a remaining diluted chemical remaining in a chemical tank after spraying the chemical on a field. SOLUTION: A single purpose tank 18 for fresh water, storing the fresh water, and the chemical tank 19 storing the chemical are installed, and a first passage 42 for sending out the fresh water force-fed from the single purpose tank 18 for the fresh water by a first pump 20 for force-feeding the fresh water, and a second passage 27b for sending out the chemical force-fed from the chemical tank 18 by a second pump 34 for force-feeding the chemical are also installed. The first passage 42 and the second passage 27b are joined at a mixing part P1 for mixing the fresh water with the chemical, and the mixed product is sent to spray nozzles (45a, 45b and 45c) for spraying the diluted chemical. An excess water passage 40 formed between the first pump 20 and the mixing part P1, and for returning the excess water for the mixing part P1 to the single purpose tank for the fresh water is also installed. COPYRIGHT: (C)2006,JPO&NCIPI
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