Water discharge valve device and flush water tank device with same

Abstract

A water discharge valve device includes: a water discharge valve unit which has a valve element for opening and closing a discharge port and a control casing for controlling an up-down movement of the valve element; a casing module which includes a peripheral wall extending upwardly from a bottom wall of a water storage tank while surrounding peripheries of the discharge port and the control casing of the water discharge valve unit, to define an upwardly open space therebetween, an opening formed to penetrate through the peripheral wall, and a switching valve attached to the peripheral wall and adapted to open and close the opening; and a communication port formed in a peripheral plane extending from the control casing of the water discharge valve unit to the discharge port, to provide fluid communication between the casing module and the discharge port.

Description

technical field [0001] The present invention relates to a drain valve device and a cleansing water tank device provided with the same, and more particularly to a drain valve device of a cleansing water tank for storing cleansing water for cleaning toilets and a cleansing water tank device provided with the device. Background technique [0002] Conventionally, the following devices are known as a drain valve device of a flush water tank for storing flush water for flushing toilets and a flush water tank device equipped with the device. A cylinder body is provided in the way of the drain port and the drain valve for opening and closing the drain port, an opening is formed on the side of the cylinder body, and a valve body for opening and closing the opening of the cylinder body is provided at the same time. [0003] In the drain valve device of such a conventional cleansing water tank and the cleansing water tank device equipped with the device, when performing a large cleansi...

AI Technical Summary

Problems solved by technology

[0006] Therefore, when the valve body of the drain valve is opened by such washing water, the valve body of the drain valve acts on the downward pressure, so the drain valve closes early with the flow of the washing water, and there is a problem that remains in the washing water tank after the drain valve closes the drain port. The water level (dead water level) of the cleaning water inside is uneven

[0007] In addition, in order to suppress such premature closing of the drain valve, for example, it is necessary to take measures such as enlarging the buoy of the drain valve so that a large buoyancy acts on the drain valve, but there is also a problem that the overall size of the drain valve device tends to increase.

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