| 摘要 |
PROBLEM TO BE SOLVED: To realize construction of a safe work environment capable of blowing an appropriate quantity of air to entire tunnels and ensuring less powder dust.SOLUTION: A dust collection and ventilation facility 1 of a building 2 partitioned into a plurality of work spaces R, comprises: suction means 4 including a rotary blade collectively drawing in the air containing powder dust in each work space R via dust collection means; operation means to which information in response to a current work phase of each work space R is input; and control means C1 to C6 controlling a rotation speed of the rotary blade of the suction means in response to a necessary suction amount, which is set in advance in response to a work phase in each work space R, necessary in all the work spaces R changing depending on the transition of work phases in the respective work spaces R.SELECTED DRAWING: Figure 1 |
