| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wash water tank device capable of obtaining a predetermined desired wash water quantity at the time of flushing with a small wash water quantity. <P>SOLUTION: In the present invention, the tank device (18) for supplying wash water to a water toilet bowl (1) has at least 2 stages of wash water quantity. The tank device includes: a water storage tank (22) having a drain outlet on the bottom thereof; drain valves (72, 74) for opening/closing a drain outlet (22a); a cylindrical body (76) having a opening portion (76c) in a side surface (76b) extending from the bottom of the water storage tank so as to surround the drain outlet; selector valves (90, 92) for opening/closing the opening portion; and an electric drive means (50) for driving the drain valves and the selector valves. In the case of a small wash water quantity, after receiving a wash start signal, the electric drive means drives selector valves to be close to or in contact with the opening portion of the cylindrical body, and at the same time, drives the drain valves to open the drain outlet, then keeps the states of the selector valves and the drain valves for a predetermined time. <P>COPYRIGHT: (C)2012,JPO&INPIT |
