Oral Cleaning Nozzle Flow Path for High Pressure, Low Discharge Load
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Solution Overview
Problem
Existing oral cavity cleaning devices do not achieve optimal cleaning efficacy, and there is a need to enhance the cleaning effect further.
Innovation Solution
A nozzle for an oral cavity cleaning device that discharges fluid at a pressure of 1 MPa to 4 MPa with a discharge load of 0.19 N to 0.38 N, and is mounted in an attachable and detachable manner, combined with a pump mechanism that alternates suction and delivery steps to increase the cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the fluid pressure is increased to enhance cleaning effect, then the cleaning efficacy is improved, but the discharge load increases which may cause discomfort or damage
Solution Approach 1:
The patent applies parameter changes by precisely controlling the flow path dimensions (widths W1-W4 and lengths L1-L4) to optimize the relationship between fluid pressure and discharge load. By adjusting geometric parameters of the flow path, the device achieves enhanced cleaning effect through pressure control while maintaining discharge load within comfortable limits (0.03N to 0.38N).
Solution Approach 2:
The patent implements dynamics by creating a flow path with varying cross-sectional areas that dynamically adjusts fluid flow characteristics. The flow path width changes progressively (W1 > W2 > W3 > W4) to create controlled pressure zones, allowing the system to adapt pressure and load conditions during fluid discharge for optimal cleaning performance.
2Speed
If the flow path is narrowed to increase fluid velocity and cleaning effect, then the cleaning efficacy is improved, but the pressure loss increases
Solution Approach 1:
The patent applies segmentation by dividing the flow path into multiple sections with progressively changing dimensions (four distinct width zones W1-W4 and four length zones L1-L4). This segmented approach allows controlled velocity increase in each section while managing overall pressure loss, rather than using a single abrupt narrowing.
Solution Approach 2:
The patent implements periodic action through the alternating pattern of narrowing and widening sections in the flow path. The flow path creates periodic changes in cross-sectional area, which generates rhythmic velocity and pressure variations that enhance cleaning effect while distributing pressure loss across multiple zones rather than concentrating it in one location.
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 nozzle and device improve cleaning efficacy by increasing fluid pressure and reducing discharge load, allowing for more effective removal of dirt and debris in the oral cavity.
Implementation Method 1
a fluid introduced into the flow path from the inflow port and having a pressure of 1 MPa or more and 4 MPa or less is discharged from the discharge port with a discharge load of 0.19 N or more and 0.38 N or less
Implementation Method 2
The fourth flow path is formed with a narrowing part that narrows the flow path, and the downstream side of the narrowing part is formed so as to widen from the narrowing part toward the outflow port side. In this way, cavitation is generated in the cleaning liquid, and the cleaning effect in the oral cavity can be enhanced.
Data Source
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AI summary
The present disclosure provides a nozzle with which an oral cavity cleaning effect can be further improved and which is usable for an oral cavity cleaning device. The present disclosure also includes an oral cavity cleaning device comprising the nozzle. The nozzle (4) according to the present disclose includes a nozzle housing (40) in which a flow path (P1) having an inflow port (P1a) and a discharge port (P1b) is formed. The nozzle (4) is configured such that a fluid introduced into the flow path (P1) from the inflow port (P1a) and having a pressure of 1 MPa or more and 4 MPa or less is discharged from the discharge port (P1b) at a discharge load of 0.19 N or more and 0.38 N or less.