A water tank drainage device utilizing pressure difference for drainage

Abstract

The invention discloses a drain device for draining water from a water tank by the aid of pressure difference. The drain device comprises a shell, a drain outlet, a floating body, a water storage chamber and a water pumping mechanism. The shell is of a hollow structure, and an opening is formed in the bottom of the hollow structure; the drain outlet is formed in the bottom wall of the water tank; the floating body is movably arranged in the shell and is in seal fit with the drain outlet; the water storage chamber is formed between the inside of the shell and the outside of the floating body and is positioned above the floating body; the water pumping mechanism is communicated with the water storage chamber; water in the water storage chamber can be pumped by the water pumping mechanism, so that up-down pressure difference on the floating body can be changed, the floating body can upwardly float, the drain outlet can be opened, and the water can be drained. The drain device has the advantages that change of the pressure difference on the floating body can be controlled, accordingly, the floating body can float and descend under the control, and the drain device for the water tank can be started and stopped under the control, has low start-stop force values and is simple in structure; the electric control type drain device is easy to design and good in user experience, and electricity can be saved.

Description

technical field [0001] The invention relates to a water tank drainage device utilizing pressure difference to discharge water. Background technique [0002] There are many drainage devices (drainage valves) on the market with various drainage principles and structures. Although most of these drainage devices have relatively reliable functions and stable drainage, they often require a large opening and closing force. For example, the common drain valves open the drain outlet by pulling the water sealing plate in the valve body to realize drainage. Since the water pressure directly acts on the water sealing plate, the force required to lift the water sealing plate is very large, and it is very uncomfortable to use. Convenience, poor user experience, and when the drain valve that requires a large pulling force is designed as an electronic control type, the required motor power is also relatively large, which will shorten the number of times the power supply battery is used, whi...

AI Technical Summary

Problems solved by technology

[0002] There are many drainage devices (drainage valves) on the market with various drainage principles and structures. Although most of these drainage devices have relatively reliable functions and stable drainage, they often require a large opening and closing force. For example, the common drain valve that pulls the water sealing plate in the valve body to open the drain port to realize drainage. Since the water pressure directly acts on the water sealing plate, the force required to lift the water sealing plate is very large, and it is very uncomfortable to use. Convenience, poor user experience, and when the drain valve that requires a large pulling force is designed as an electronic control type, the required motor power is also relatively large, which will shorten the number of times the power supply battery is used, which is not conducive to practical use

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