| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heating furnace that can equally heat up an object to be heated without complicating the structure and depending on the position in a heat treatment chamber while suppressing a heat loss. <P>SOLUTION: A hot air generating circulation part 20 is connected with a heat treatment chamber 10 via a wind direction switching valve 60 and air supply/exhaust flow passages 30 and 40. The first air supply/exhaust flow passage 30 is connected with one side of the heat treatment chamber 10 and the second air supply/exhaust flow passage 40 is connected with the other side of the heat treatment chamber 10. When the wind direction switching valve 60 is switched to the first status, the air supply hot air PW from the hot air generating circulation part 20 passes toward the second air supply/exhaust flow passage 40 from the first air supply/exhaust flow passage 30 in the heat treatment chamber 10. In addition, when the wind direction switching valve 60 is switched to the second status, the air supply hot air PW from the hot air generating circulation part 20 passes toward the first air supply/exhaust flow passage 30 from the second air supply/exhaust flow passage 40 in the heat treatment chamber 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
