Atomizing Body Sealing Structure for Soft Mist Inhalers
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Solution Overview
Problem
Existing soft mist inhalers suffer from poor sealing performance, leading to inefficient utilization of medicinal liquid due to large droplet sizes not being drawn into the lungs and the need for repriming after prolonged non-use, which wastes medication and complicates usage tracking.
Innovation Solution
An atomizing body assembly with a T-shaped steel member, chip-mounting part, filter cartridge, and O-rings forms a sealed structure, enhancing deformation and clamping performance to improve sealing, ensuring aerosols of 1-5 microns are generated and efficiently delivered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high pressure (5-40 MPa) is applied to generate aerosols of 1-5 microns, then aerosol generation is improved, but sealing performance deteriorates due to the sudden pressure change
Solution Approach 1:
The sealing structure is divided into multiple segments: a first sealing ring between the piston and cylinder wall for low-pressure sealing, and a second sealing ring between the atomizing body assembly and cap for high-pressure sealing. This segmentation allows each sealing ring to be optimized for its specific pressure range, resolving the contradiction between aerosol generation and sealing performance.
Solution Approach 2:
Different sealing rings are positioned at different locations within the atomizing body assembly, each with specific local sealing properties. The first sealing ring is located in the piston-cylinder interface area, while the second sealing ring is located at the atomizing body-cap interface. This local differentiation enables effective sealing under varying pressure conditions throughout the device.
2Duration of action of stationary object
If the soft mist inhaler is not used for 3 days or longer, then storage is achieved, but repriming is required causing waste of medicinal liquid
Solution Approach 1:
The dual sealing ring structure maintains continuous effective sealing between storage and usage phases. The first sealing ring prevents leakage during storage, while the second sealing ring ensures proper pressure buildup during usage. This continuity eliminates the need for repriming after storage, preventing medicinal liquid waste.
3Device complexity
If existing sealing structure is used, then device simplicity is maintained, but sealing performance under sudden pressure change deteriorates
Solution Approach 1:
The sealing system is segmented into two independent sealing rings positioned at different locations. The first sealing ring handles low-pressure conditions during storage and priming, while the second sealing ring handles high-pressure conditions during aerosol generation. This segmentation improves reliability without significantly increasing overall device complexity.
Solution Approach 2:
The atomizing body assembly serves as an intermediary component that houses both sealing rings and coordinates their functions. It includes a receiving cavity that accommodates the piston and first sealing ring, and an interface with the cap for the second sealing ring. This intermediary structure integrates the dual sealing mechanism smoothly into the device.
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 improved sealing structure ensures efficient delivery of aerosols to the lungs, reduces waste by eliminating the need for repriming, and provides accurate usage tracking.
Implementation Method 1
The medium-sized O-ring is disposed between the chip-mounting part and the filter cartridge, and the chip-mounting part, the medium-sized O-ring and the filter cartridge form a sealing structure
Implementation Method 2
generate microdroplets by pushing, under a high pressure, a medicinal liquid through a microfluid channel structure included in an atomizing body assembly
Implementation Method 3
the fluid pressure required to convert the medicinal liquid into aerosols of 1-5 microns is between 5 Mpa to 40 MPa
Implementation Method 4
The large conical surface, the small conical surface, the cylindrical surface, and the top surfaces form the receiving cavity for accommodating the top of the chip-mounting part
Data Source
AI summary
The present application discloses an atomizing body assembly and a soft mist inhalation device with improved sealing performance. The atomizing body assembly includes a T-shaped steel member, a chip-mounting part, a filter cartridge, and a medium-sized O-ring. The chip-mounting part, the medium-sized O ring and the filter cartridge collectively form a sealing structure.