| 摘要 |
PROBLEM TO BE SOLVED: To provide a fan having high durability capable of maintaining sufficient durability even under a high temperature environment or an acid environment, and a hot water supply device equipped with the same.SOLUTION: A fan of this invention includes: an impeller including a main plate having a first surface, a first blade made up of a plurality of first blade members extended from an inner peripheral side to an outer peripheral side of the first surface of the main plate and formed to protrude from the first surface, and a shroud covering the first blade and integrally formed with the first blade; a fan case storing the impeller in an inside thereof; a driving source attached to the fan case in order to drive the impeller; and a rotating shaft connecting the impeller and the driving source. Regarding a protrusion direction height of the first blade member protruded from the first surface, the first blade member has a straight protrusion region in which the height is linearly increased from the outer peripheral side to the inner peripheral side, and a curve protrusion region in which the height is curvilinearly increased from the outer peripheral side to the inner peripheral side, and the curve protrusion region is positioned in the inner peripheral side of the first surface compared to the straight protrusion region, and the straight protrusion region is welded to the main plate. |
