| 摘要 |
<p>PURPOSE: A long distance blastpipe is provided to improve control effect and to save ventilation power of a pest control machine by improving the blowing efficiency with low power, by ejecting liquid chemical to the long distance and at the same time ejecting the liquid chemical to the wide area as increasing the amount of air blowing. CONSTITUTION: A long distance blastpipe includes a first blastpipe (1), a second blastpipe (2) and an outer air inlet hole (3). The first blastpipe is connected to an air blower so that the wind is flowed in, and has a venture tube shape in which the diameter of a wind inlet part is large and becomes smaller as going far from the wind inlet part. The second blastpipe is connected to a wind outlet part of the first blastpipe. The diameter of a wind inlet part connected to the wind outlet part of the first blastpipe is small and becomes larger as going far from the wind inlet part and then becomes smaller. The outer air inlet hole is formed between the first blastpipe and the second blastpipe.</p> |
