| 摘要 |
PURPOSE:To eliminate collapse and damage of elctronic parts by a method wherein suction air of a self-cooling fan is utilized to cool the electronic parts to recude the temperature rise of the electronic parts by sucking cool air surely by a simple structure. CONSTITUTION:A heating device is constituted of an oven unit 16, accommodating and heating a substance to be heated, a fan 18, supplying the heat of a burner 17 to the oven unit 16, a motor 22, driving the fan 18, the self-cooling fan 21, cooling the motor 22, an exhaust tube 26 of the oven unit 16, the exhaust tube 20 of the self-cooling fan and an air feeding chamber 24 of the self-cooling fan 21 equipped with the electronic parts 23. When the oven unit 16 is operated, the fan and the self-cooling fan 21 are rotated by the driving of the motor 22. At this time, the suction air of the self-cooling fan 21 is supplied forcibly through the lower hole 29 of the air feeding chamber 24 and cools the electronic parts 23, equipped in the air feeding chamber 24, thereafter, is discharged through the exhaust tube 20 communicated with the air feeding chamber 24 through the self-cooling fan 21. Thus, ventilating air may be obtained surely without being intercepted by the forced exhausting of the oven unit 16 and the elctronic parts unit may be cooled effectively. |
