| 摘要 |
<p>The present invention relates to air blast equipment capable of indicating a reaching region of emitted air. The air blast equipment comprises: a ventilation module spraying air to the particular direction; and a region irradiating module of irradiating the valid reaching region of the air which is emitted to the particular direction by radiating ray of light. According to the present invention, the area of the emitted air can be visually easily distinguished. A boundary line can be distinguished accurately although working for the long time. The boundary can be easily controlled and indicated according to the intensity of the air, the concentration, the temperature, and the concentration of ion.</p> |
