Bidet Nozzle Jet Switching for Wide-Area Comfortable Washing
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Solution Overview
Problem
Existing sanitary washing apparatuses for female private parts during bidet washing often cause discomfort due to uneven water distribution and strong stimuli, particularly when switching between wide and narrow washing ranges, and fail to efficiently clean menstrual blood dirt from a wide area.
Innovation Solution
A sanitary washing apparatus with a nozzle that can switch between first and second jetting modes, where the first jetting provides a narrower range with slower flow velocity and the second jetting provides a wider range with faster flow velocity, and includes an impingement force suppression device to reduce stimuli during range switching, ensuring comfortable and effective cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the nozzle moves to expand the washing range, then the washing area is increased, but the user feels discomfort due to water jetting in a wide range
Solution Approach 1:
The patent transitions from one-dimensional nozzle movement to two-dimensional water distribution control. By maintaining a fixed nozzle position and using multiple jetting ports arranged in different directions and angles, the system expands the washing area through spatial distribution of water jets rather than mechanical movement, thereby avoiding user discomfort from wide-range jetting.
2Area of stationary object
If spiral jetting is used to expand the washing range, then the washing area increases in a two-dimensional shape, but a hollow portion occurs inside the spirally jetted water reducing washing performance
Solution Approach 1:
The patent divides the water jet into multiple segments by providing several jetting ports (first, second, third, and fourth jetting ports) positioned at different locations and angles. This segmentation eliminates the hollow portion problem of spiral jetting by distributing water coverage uniformly across the washing area, ensuring reliable washing performance throughout the entire range without dead zones.
Solution Approach 2:
Each jetting port is designed with specific local characteristics - different positions, orientations, and jetting directions - to optimize coverage in its specific zone. The first and second jetting ports target one area with specific angle and force, while the third and fourth ports cover another area, creating uniform overall coverage without hollow portions.
3Area of stationary object
If the washing range is widened, then the coverage area increases, but the flow velocity decreases causing weaker washing force
Solution Approach 1:
The patent segments the water delivery system into multiple independent jetting ports, each maintaining high flow velocity in its specific direction. By distributing multiple high-velocity jets across different zones rather than one low-velocity wide jet, the system achieves both wide coverage and strong washing force simultaneously.
4Productivity
If strong water force is applied to wash wide range quickly, then washing efficiency improves, but strong stimuli are unnecessarily applied to the woman's delicate area causing discomfort
Solution Approach 1:
The patent applies different water jet characteristics to different anatomical areas. Some jetting ports are positioned and angled to deliver strong, focused water force for efficient washing of broader areas, while other ports provide gentler, more diffused water flow for delicate regions. This localized differentiation of water jet quality achieves high washing efficiency without causing discomfort from excessive stimuli.
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 allows for comfortable bidet washing by adapting the impingement force to the desired washing range, efficiently washing both narrow and wide areas without causing unnecessary strong stimuli, and effectively removes menstrual blood dirt from a wide range.
Implementation Method 1
a nozzle (410) including a jetting port (411) and configured to squirt water from the jetting port (411) and to cause the water to impinge on female private parts
Data Source
AI summary
According to one embodiment, a sanitary washing apparatus includes a nozzle including a jetting port and configured to squirt water from the jetting port and to cause the water to impinge on female private parts. The nozzle is operable to switch between a first jetting and a second jetting. The first jetting squirts the water from the jetting port to cause the water to impinge on a first range of the female private parts, and the second jetting squirts the water from the jetting port more diffusively than the first jetting to cause the water to impinge evenly on a second range wider than the first range without moving the jetting port. The water is squirted so that flow velocity in the first range of the first jetting is slower than flow velocity in the second range of the second jetting.