Wash water tank device and drainage device

Abstract

The disclosed wash water tank device (18) stores wash water for washing a toilet (1), and is provided with: a water storage tank (22) in which wash water is stored and which has a drainage opening in the bottom surface; a drainage valve (72) which opens and closes the drainage opening (22a) and supplies wash water to the flush toilet; a cylinder (76) which, having a side surface (76b) extending upward from the bottom surface of the water storage tank so as to surround the drainage opening, has an open top and has an opening (76c) formed in the side surface; and and a switching valve (90, 92) which opens and closes the opening of the cylinder to enable adjusting the opening cross section of the opening of the cylinder such that the quantity of wash water supplied from the drainage opening of the water storage tank to the flush toilet can be set to multiple levels, including at least large, medium and small levels.

Description

technical field [0001] The present invention relates to a flush water tank device and a drainage device, and more particularly to a flush water tank device for storing flush water for flushing a toilet, and a flush water tank device equipped with a water tank for storing flush water that can be supplied to the toilet by opening and closing a drain port. Drain device for drain valve of wash water. Background technique [0002] Conventionally, as a flush water tank device for storing flush water for flushing a toilet, in Patent Document 1, as a flush water tank device for storing flush water for flushing a toilet, a flush water tank device equipped with the following drainage device is known. Clean water tank device, which forms an opening on the side of the cylinder that surrounds the drain port formed on the bottom of the water storage tank, and at the same time installs a valve core that can open and close the opening. The opening of the cylinder is kept open to increase t...

AI Technical Summary

Problems solved by technology

On the other hand, when the amount of flushing water is reduced in this way, there will be a problem that when the toilet with the flushing water tank device is an old type toilet, poor flushing will occur due to insufficient flushing water, or the sewer piping on the downstream side of the toilet will cause poor cleaning. Dirt, etc. are not easily washed away due to the restriction of the environment, and sometimes the amount of washing water has to be increased.

[0011] Regarding the above-mentioned problem, in the flushing water tank device described in Patent Document 1, the amount of flushing water is constant in the respective flushing modes of large flushing and small flushing, so that the amount of flushing water cannot be changed.

[0012] On the other hand, in the flush water tank device described in Patent Document 2, the amount of flush water can be changed by changing the opening cross-sectional area of ​​the water passage hole formed on the side of the cylinder. The internal washing water directly flows into the float valve that closes the drain, so there is a problem that when the water potential of the inflowing washing water increases, the operation of the float valve that closes the drain becomes unstable, and the desired washing effect cannot be obtained. Net water volume

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