| 摘要 |
PURPOSE:To enable to make sound soft and eliminate instability of resistance around a suction opening at the same time by installing a cover and a guider in such a manner that an outside of a mainbody is covered with an insulator with covering material and a suck-in opening of a blower is placed at the opposite side of the mainbody and also guider formed by wire netting is placed at the suck-in opening side simultaneously. CONSTITUTION:An outer burning cylinder 4' is covered with an insulator 26 which is composed of a glass wool etc. covered with vinyl sheet etc. and between the outer burning cylinder 4' and a base plate 21 of a blower, a covering material 25, the insulator 26 and the guider 23, and a suck-in opening 20 facing to a mainbody are connected and fixed. Noise generated from the blower is released to the outside of the mainbody and absorbed after collision with a lattice-like silencer layer and absorbed after repeated reflection and noise is made soft. Floating up movement of the covering material and the insulator is prevented by the guider 23 and resistance except a damper is kept constant, owing to a certain length of the guider.
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