| 摘要 |
PURPOSE:To unify air supply to a suction port, by constituting the titled hot water supply machine by arranging an area variable damper having a variable opening part on a concentric circle with the suction port and constituted so as to narrow down toward the center on the suction port of a blower, in the household miniature hot water supply machine fed with petroleum. CONSTITUTION:As an area variable damper 3 having an opening 4 whose opening area is reducing concentrically in order is arranged on a suction port 2 of a blower 1 and the opening 4 confronting with the suction port 2 is changed through turning of the damper 3, the opening area of the suction port 2 is made to vary concentrically toward the center. With this constitution, air to be supplied to the suction port 2 of the blower is supplied uniformly without being biased. It is, therefore, possible to improve blowing properties and to make a noise of the titled machine low.
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