Mixing Device Regulating Device for Dental Powder Clogging
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Solution Overview
Problem
Existing powder jet devices for dental applications often clog when using small particle size powders due to inadequate inlet designs, leading to excessive bulk flow and dosage issues.
Innovation Solution
A mixing device with a regulating device along the main flow of the mixing chamber, featuring inlet and outlet areas with strategically arranged orifices to control the flow of powder and gas, preventing clogs and allowing for precise regulation of the powder and gas mixture, even with fine powders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inlet area is extended to prevent clogging, then the reliability is improved, but the bulk flow increases excessively
Solution Approach 1:
The patent changes the geometric parameters of the inlet opening and introduces a regulating device that can adjust the effective flow area dynamically. By modifying the parameters of the inlet geometry and adding controllable regulation elements, the system prevents clogging while maintaining control over bulk flow quantity.
Solution Approach 2:
The patent introduces a regulating device with movable components (regulating body, spring, pressure-dependent actuation) that dynamically adjusts the inlet characteristics based on operating conditions. This dynamic adjustment prevents clogging when needed while limiting excessive bulk flow under normal conditions.
2Productivity
If the inlet opening is enlarged to allow better powder flow, then the productivity is improved, but the dosage precision deteriorates
Solution Approach 1:
The regulating device provides dynamic control of the inlet opening area, allowing the system to adapt between high-flow modes for productivity and precision-controlled modes for accurate dosing. The movable regulating body enables continuous adjustment of flow characteristics.
Solution Approach 2:
The system changes the effective flow parameters through the regulating device, which can modify the inlet area, flow velocity, and pressure characteristics. This enables the same inlet structure to serve both high-productivity and precision-dosing requirements by adjusting operational parameters.
3Manufacturing precision
If a regulating device is added to control the main flow, then the dosage precision is improved, but the device complexity increases
Solution Approach 1:
The regulating device is designed to be actuated by the flow dynamics itself (pressure-dependent opening/closing), eliminating the need for external control systems. The spring-loaded regulating body automatically responds to pressure changes, providing self-regulating dosage control without complex external actuation mechanisms.
Solution Approach 2:
The patent uses pneumatic principles where the pressurized gas flow itself actsuates the regulating mechanism. The pressure differential across the regulating body controls its position, leveraging the existing fluid pressure to operate the regulation function without separate mechanical actuation systems.
4Reliability
If the inlet opening is made larger to prevent clogs, then the reliability is improved, but the loss of substance increases
Solution Approach 1:
The regulating device dynamically changes the effective inlet area parameter to match actual processing needs. Instead of a permanently large opening that causes waste, the system adjusts the opening size to the minimum necessary to prevent clogging, thereby reducing powder loss.
Solution Approach 2:
The inlet opening area is made dynamic rather than static, allowing the system to close down when high flow is not needed and open only sufficiently to prevent clogging. This dynamic adaptation minimizes unnecessary powder loss while maintaining reliability.
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 solution effectively prevents clogging and allows for precise control of the powder and gas mixture, enabling the use of a wide range of powder particle sizes and ensuring efficient delivery during dental treatments.
Implementation Method 1
the powder is entrained by a gas flow, and is especially entrained into the mixing chamber by an air flow exiting the nozzle
Data Source
AI summary
The mixing device for mixing a powder with a pressurized gas, comprising a mixing chamber (20) with an inlet area (22), which has at least one inlet opening (24), by way of which powder and/or pressurized gas and/or a mixture thereof may be introduced into the mixing chamber (20),and at least one outlet area (26), which is designed for withdrawing from the mixing chamber (20) a main flow (HR) of a gas or powder or a powder and gas mixture directed along the mixing chamber (20) which essentially extends from the inlet area (22) to the outlet area (26), characterized in that a regulating device (10) is arranged along and/or in continuation of the main flow (HR), regulating the main flow (HR) of the gas or powder or powder and gas mixture.