| 摘要 |
<p>Disclosed is a preheating apparatus. According to the present invention, preheating apparatus includes: an inner cover, an outer cover, and a suction device. An upper part of the inner cover is open. A plurality of flame holes penetrate a side of the inner cover and are formed. The outer cover is arranged to cover an outer side of the inner cover. A plurality of suction holes are formed on a side of the outer cover. The suction device is joined with the suction holes to form the preheating apparatus. The preheating apparatus is arranged to cover an impregnated nozzle inserted into a vacant part of the inner cover. The flame holes and the suction hole formed in the preheating apparatus are arranged to be placed apart from each other at intervals along each side of the inner and outer cover. The suction device applies suction force by which flame and gas, preheating the impregnated nozzle, forms constant flow from the vacant part of the inner cover towards the suction device. Therefore, the preheating apparatus can uniformly preheat the impregnated nozzle.</p> |
