Toilet Tank Flow Rectifying Portion Suppresses Water Slapping Sound
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Solution Overview
Problem
Conventional tank devices for flush toilets generate an uncomfortable water slapping sound due to the spreading of flush water, which is not adequately addressed by existing solutions that use inclined surfaces to redirect the water, as the water still forms puddles and creates noise upon collision.
Innovation Solution
A tank device with a flow rectifying portion on its inner wall surface, featuring concave and convex parts that guide flush water towards a downstream direction, preventing retention and spreading, thus reducing the water slapping sound. The flow rectifying portion is strategically placed to receive flush water from the spout and direct it smoothly, suppressing areal spreading and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an inclined surface is provided below the spout to redirect flush water along the tank wall, then the water slapping sound is suppressed, but the flush water splashes in all circumferential directions and forms a water puddle on the inclined surface, which still generates water slapping sound
Solution Approach 1:
The flow rectifying portion divides the inclined surface into multiple segments using convex parts and concave parts. This segmentation prevents water from spreading uniformly in all directions and instead channels it through defined pathways, reducing water puddle formation and associated slapping sounds.
Solution Approach 2:
The inclined surface is modified with localized convex and concave structures at specific positions. These local modifications create areas of different flow resistance and direction, guiding water flow in a controlled manner rather than allowing uniform spreading, thereby reducing water slapping sound.
2Productivity
If flush water is spouted toward the inner wall surface, then water supply is efficient, but water collision against the water surface generates uncomfortable water slapping sound
Solution Approach 1:
The flow rectifying portion acts as an intermediary structure between the water supply and the tank water surface. It receives the spouted water, redirects it along the inclined surface, and controls its flow path to prevent direct collision with the water surface, thereby eliminating the slapping sound while maintaining supply efficiency.
Solution Approach 2:
The inclined surface with flow rectifying portions is positioned to intercept water flow before it reaches the water surface. This preliminary redirection action guides water along a controlled path, preventing the harmful collision that generates slapping sounds.
3Object-affected harmful factors
If the flow rectifying portion with concave and convex parts is provided on the inner wall surface, then water spreading is suppressed and flow is guided smoothly downstream, but the structure becomes more complex
Solution Approach 1:
The flow rectifying portion integrates multiple functions into a single structure: the inclined surface provides water redirection, while the convex and concave parts provide flow channeling and spreading prevention. This merging of functions into one component achieves the desired effect without requiring multiple separate parts, thus limiting the increase in structural complexity.
Solution Approach 2:
Rather than making the entire tank structure complex, only specific regions of the inner wall surface are modified with convex and concave parts. This localized approach achieves the flow control objective while minimizing the overall structural complexity of the tank.
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 tank device effectively restrains the spreading of flush water, leading to a significant reduction in the water slapping sound by guiding it efficiently downstream, ensuring smooth flow and minimizing retention, thereby enhancing user comfort.
Implementation Method 1
the flow rectifying portion having a concave part and/or a convex part each formed on the inner wall surface... smoothly guide the flush water toward a downstream side of the flow of flush water through the flow rectifying portion
Data Source
AI summary
Provided is a tank device capable of restraining splashing of flush water during water supply to suppress a water slapping sound. A tank device for supplying flush water stored therein to a flush toilet comprises: a tank main unit for storing flush water in an internal space 24C thereof defined by an inner wall surface which comprises a transverse surface 27B extending in a transverse direction and a standing surface 27A extending in an up-down direction; and a water supply member 26 for supplying flush water from a water supply port 26A to the internal space of the tank main unit, the water supply member 26 being configured to spout flush water toward the inner wall surface defining the internal space 24C, wherein the tank main unit comprises a flow rectifying portion 46 provided in a region of the inner wall surface to which flush water is spouted, the flow rectifying portion 46 having a convex part 46A and a concave part 46B each formed on the inner wall surface.