Sprayer Nozzle Point Contact Configuration for Uniform Gas Ejection
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Solution Overview
Problem
Existing sprayers for delivering mixed liquids in the medical field face challenges with non-uniform ejection of sterilized gas due to eccentricity of liquid orifices relative to gas orifices, making uniform ejection difficult to achieve.
Innovation Solution
The sprayer design features a nozzle with a gas orifice and liquid orifice configuration where the outer periphery of the liquid orifice and the inner periphery of the gas orifice have point contact at multiple circumferentially spaced points, maintaining a constant size of gaps between them to ensure uniform ejection of gas and prevent radial deviation of the liquid orifice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ribs are provided in the inner peripheral surface of the gas orifice to sustain the liquid orifice, then the liquid orifice can be prevented from becoming eccentric relative to the gas orifice, but the manufacturing precision becomes difficult to achieve due to the microscopic dimension of the clearance
Solution Approach 1:
A support ring is introduced as an intermediary component between the liquid orifice and the gas orifice. The support ring has an outer peripheral surface that contacts the outer peripheral surface of the liquid orifice and an inner peripheral surface that contacts the inner peripheral surface of the gas orifice, thereby mediating the positional relationship and preventing eccentricity without requiring direct rib formation in the microscopic clearance.
Solution Approach 2:
The support function is segmented from the gas orifice structure and embodied as a separate support ring component. This segmentation allows the support function to be achieved while maintaining the microscopic clearance integrity, avoiding the manufacturing difficulties associated with forming ribs directly in the narrow space.
2Reliability
If the clearance between the liquid orifice and gas orifice is made microscopic to enable uniform ejection, then the ejection uniformity is improved, but it becomes difficult to provide ribs without obstructing the ejection
Solution Approach 1:
The support ring serves as a mediator that provides the necessary support function while preserving the microscopic clearance. By introducing this intermediate component, the system achieves uniform ejection without the need to form ribs within the constrained microscopic space, thereby maintaining ease of manufacture.
3Reliability
If ribs are formed to sustain the liquid orifice, then the liquid orifice position is stabilized, but the clearance may be filled up by the ribs
Solution Approach 1:
The support ring acts as an intermediary that stabilizes the liquid orifice position through controlled contact surfaces. The outer peripheral surface of the support ring contacts the liquid orifice while the inner peripheral surface contacts the gas orifice, providing positional stability without obstructing the microscopic clearance.
Solution Approach 2:
Instead of providing ribs around the entire circumference of the gas orifice, the support ring provides localized support at specific contact points. This local quality approach maintains the necessary positional stability while preserving the clearance for gas flow.
Data Source
AI summary
A sprayer includes a nozzle through which gas is to be ejected with positiveness and uniformity. The sprayer is provided with a nozzle having inner tubes through the interior of which liquid is to pass and an outer tube receiving the inner tubes therein and allowing gas to pass through a space defined with the inserted inner tubes. The inner tubes have respective liquid orifices through which liquids are to be ejected. The outer tube is arranged therein with the liquid orifices and a gas orifice for ejecting gas. When the nozzle is viewed from front, the outer peripheries of the liquid orifices each assume a circular form while the inner peripheries of the gas orifices are differently shaped to provide plural point contact between the outer periphery of the liquid orifice and the inner periphery of the gas orifice.