Nested Flush Water Tank Structure for Low-Profile Flushing
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Solution Overview
Problem
Existing flush water tank designs with multiple tanks face challenges in achieving a low profile due to the need for a large space above the partition plate to accommodate electrical components, making it difficult to design a flush water tank with a low profile.
Innovation Solution
A flush water tank device with an inner tank made of resin and an outer tank, where flush water supplied into the inner tank overflows from multiple sides to flow into the outer tank, allowing for a longer edge and lower water level, and the inner tank's cross-sectional area varies to store more water with high head pressure, suppressing rippling and enabling a low profile design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If flush water tanks are divided into multiple tanks with discharge valves, then water saving and flushing performance are improved, but the tank height increases due to the need for electrical components above the water surface
Solution Approach 1:
The patent applies nesting by placing the inner tank inside the outer tank, with the inner tank's overflow edge positioned below the electrical components. This nested configuration allows multiple tanks to coexist in a compact vertical arrangement, enabling the electrical components to be positioned above the overflow level while maintaining a reduced overall tank height compared to traditional side-by-side or stacked configurations.
2Reliability
If electrical components are arranged above the water surface, then component reliability is improved, but the tank height increases to accommodate the space above the partition plate
Solution Approach 1:
The patent transitions from a horizontal partition arrangement to a vertical nested arrangement, changing the spatial dimension of component placement. The inner tank is positioned within the outer tank such that its overflow edge creates a vertical separation, allowing electrical components to be arranged in the vertical dimension above the overflow level while maintaining a compact overall height.
3Productivity
If the inner tank has a larger cross-sectional area at the upper part, then more water can be stored with high head pressure for instantaneous flow, but the manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by varying the cross-sectional area of the inner tank along its height, with the upper part having a larger area than the lower part. This geometric parameter variation creates a bulbous or inverted frustum shape that increases water storage capacity at the upper portion, thereby increasing head pressure and instantaneous flow rate while maintaining manufacturability through standard molding techniques.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design allows for a flush water tank device with a low profile while maintaining a high instantaneous flow rate and effective flushing performance, reducing the risk of equipment being covered by water and optimizing space utilization.
Implementation Method 1
flush water supplied into the inner tank overflows from two or more sides of the inner tank to flow into the outer tank
Implementation Method 2
the inner tank's cross-sectional area varies to store more water with high head pressure
Data Source
AI summary
The present invention provides a flush water tank device including an outer tank, an inner tank disposed inside the outer tank, a water supply valve, a first water discharge/stop switching mechanism disposed inside the outer tank and outside the inner tank to switch supply and stop of flush water stored in the outer tank to the flush toilet main body, and a second water discharge/stop switching mechanism disposed inside the inner tank to switch supply and stop of flush water stored in the inner tank to the flush toilet main body, the water supply valve is configured to supply flush water into the inner tank, and the flush water supplied into the inner tank overflows from two or more sides of the inner tank to flow into the outer tank.