Bubble-Mixed Wash Water Control for Stable Sanitary Streams
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Solution Overview
Problem
Sanitary washing apparatuses face challenges in maintaining a high feeling of massiveness and stimulation while preventing water streams from bursting when air is mixed into discharged water under high-pressure conditions, as increased pulsation amplitude can cause the water stream to break before reaching the user.
Innovation Solution
A sanitary washing apparatus with a pressure variation unit that intermittently raises pressure, a bubble mixed water generation unit using negative pressure to introduce air into the wash water, and a stored water generating mode that reduces the amount of wash water stored to prevent bursting, allowing for a larger mass of water to be formed without using an air pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the pulsation amplitude of the wash water pressure is increased to improve the feeling of stimulation, then the feeling of stimulation is improved, but the discharged water portion breaks through the preceding discharged water portion and the catch-up and coalescence phenomenon does not occur
Solution Approach 1:
The patent applies preliminary action by pre-mixing bubbles into the wash water before pressure pulsation occurs. The bubble mixture is prepared in advance in the bubble mixture section, so when pressure pulsation later causes water portions to catch up and coalesce, the bubbles are already present to prevent stream breaking and maintain water stream integrity throughout the process.
2Force
If air is mixed into the discharged water by an ejector effect in a high-pressure band to improve the feeling of massiveness, then the feeling of massiveness is improved, but the bubbles coalesce and grow into larger bubbles, causing the water stream to burst before reaching the user
Solution Approach 1:
The patent applies preliminary action by pre-mixing bubbles into the wash water before pressure pulsation occurs. The bubble mixture is prepared in advance in the bubble mixture section, so when pressure pulsation later causes water portions to catch up and coalesce, the bubbles are already present to prevent stream breaking and maintain water stream integrity throughout the process.
Solution Approach 2:
The patent applies continuity of useful action by ensuring bubbles are continuously mixed into the wash water throughout the discharge process. The bubble mixture section continuously mixes air into the wash water, and the pressure pulsation continuously generates catch-up phenomena, maintaining continuous bubble presence to prevent stream breaking throughout the entire water discharge process.
3Stability of the object's composition
If the amount of wash water temporarily stored in the bubble mixture section is decreased to prevent water stream bursting, then the water stream stability is improved, but it becomes difficult for the wash water to accumulate
Solution Approach 1:
The patent applies parameter changes by controlling the pressure variation parameters (amplitude and duration) to optimize the balance between water accumulation and stream stability. The pressure pulsation parameters are specifically tuned to generate sufficient catch-up phenomena for massiveness while preventing excessive bubble coalescence that would cause stream breaking.
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 apparatus effectively prevents water stream bursting while maintaining a high feeling of massiveness and stimulation by controlling the pressure variation and air mixture, ensuring the water stream reaches the user intact.
Implementation Method 1
a pressure variation unit that gives pressure variation to the wash water to be supplied to the water discharge port
Implementation Method 2
an air introduction port that is provided between the squirting port and the water discharge port to introduce air by use of a negative pressure generated by the wash water squirted from the squirting port
Implementation Method 3
a bubble mixture section that is provided between the air introduction port and the water discharge port to temporarily store the wash water squirted from the squirting port and mix the air introduced from the air introduction port into the stored wash water in a form of a plurality of bubbles
Implementation Method 4
when bubbles are mixed into the discharged water under a certain condition, surface energy of the water stream is increased, and thus, even when the pulsation amplitude of the wash water pressure is increased, the water stream does not burst
Data Source
AI summary
When a water discharge start operation section is operated, a control unit executes, before executing a main washing mode in which wash water is discharged at a set flow rate selected in a water force selection operation section, a stored water generating mode in which required wash water is stored in a bubble mixture section by discharging wash water at a set flow rate smaller than the flow rate selected in the water force selection operation section.