Water supply apparatus
First Claim
1. A water supply apparatus in which an apparatus body is disposed in a midst of a flow passage for supplying water to an indoor facility and power generating unit is installed in the apparatus body, the power generating unit comprising;
- a rotating shaft extended in the direction perpendicular to the water flow direction of the flow passage;
an impeller mounted on the rotating shaft and rotated by a water flow;
a holder having a cylindrical portion with an arcuate cross section along the impeller and having a shaft support portion which supports a proximal end portion of the rotary shaft on a distal end portion fo the cylindrical portion;
a magnet rotated interlockingly with the impeller; and
a coil arranged to face the magnet than opposed manner wherein the holder in the power generating unit is mounted on a peripheral surface of an opening portion formed in the apparatus body in a state that the shaft support portion is inserted into the inside of the flow passage from the opening portion, and the impeller forms blades in the outward radial direction and forms clearances allowing water to pass the inside of blades.
1 Assignment
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Accused Products
Abstract
A water supply apparatus includes an apparatus body (6) disposed in a flow passage (14) for sucking water to an indoor facility and a power generation unit (23) installed in the apparatus body. Further, the power generation unit further comprises a rotating shaft (34) extended in a direction perpendicular to the water channel direction of the flow passage, an impeller (27) installed on the rotating shaft and rotated by a water flow, a magnet (43) rotated interlockingly with the impeller, and a coil (29) arranged oppositely to the magnet, wherein the impeller forms blades (38) in the radial outer direction and forms clearances (40) allowing water to pass to the inside of the blades. Since the clearances (40) are formed between the blades (38) and the rotating shaft (34), such a trouble that water flowing into the base ends of the blades obstructs the rotation of the impeller can be eliminated to increase a power generation amount by the power generation unit. In addition, since there is no need to expand the flow passage on the outside of the impeller to reduce the rotational resistance of the impeller, the size of the water supply apparatus can be reduced.
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Citations
10 Claims
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1. A water supply apparatus in which an apparatus body is disposed in a midst of a flow passage for supplying water to an indoor facility and power generating unit is installed in the apparatus body, the power generating unit comprising;
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a rotating shaft extended in the direction perpendicular to the water flow direction of the flow passage;
an impeller mounted on the rotating shaft and rotated by a water flow;
a holder having a cylindrical portion with an arcuate cross section along the impeller and having a shaft support portion which supports a proximal end portion of the rotary shaft on a distal end portion fo the cylindrical portion;
a magnet rotated interlockingly with the impeller; and
a coil arranged to face the magnet than opposed manner wherein the holder in the power generating unit is mounted on a peripheral surface of an opening portion formed in the apparatus body in a state that the shaft support portion is inserted into the inside of the flow passage from the opening portion, and the impeller forms blades in the outward radial direction and forms clearances allowing water to pass the inside of blades. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10)
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8. (canceled)
Specification