Nested Cannula Spray Nozzle for Uniform Inner-Surface Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing devices for spraying media in confined spaces, such as medical containers, face challenges with uneven distribution, difficulty in achieving uniform media distribution, and adjusting spray patterns, particularly due to the limitations of conventional two-fluid nozzles that are too large for these spaces and cause turbulent airflow, leading to detachment of applied droplets.
Innovation Solution
A device with a two-component nozzle consisting of nested cannulas with a predefined annular gap, allowing for precise and adjustable media application by minimizing airflow velocity and ensuring secure fixation and centering, enabling uniform distribution and rapid exchange of media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a medical product is sterilized in a sterilization bag, then sterilization can be performed, but the inner sides of the medical product cannot be adequately sprayed with sterilizing media
Solution Approach 1:
The sterilization process is segmented into two distinct phases: (1) spraying the sterilizing media onto the inner sides of the medical product while it is accessible, and (2) sealing the product with the sprayed surfaces facing inward within the sterilization bag. This segmentation allows adequate spray application while maintaining sterilization effectiveness.
Solution Approach 2:
The inner sides of the medical product are sprayed with sterilizing media before being placed in the sterilization bag. This preliminary action ensures that the surfaces requiring sterilization are adequately treated prior to sealing, eliminating the need to spray through the bag.
2Reliability
If the medical product is sprayed while in the sterilization bag, then sterilization can be performed, but the spray cannot reach the inner sides of the product
Solution Approach 1:
The medical product is sprayed with sterilizing media before being sealed in the sterilization bag. This preliminary action ensures uniform spray distribution on all accessible surfaces, including inner sides, without the obstruction of the bag material.
Solution Approach 2:
Instead of spraying through the bag from the outside in, the product is sprayed from the inside out while accessible, then repositioned with sprayed surfaces facing inward. This inversion of the spray sequence eliminates the barrier problem.
3Ease of operation
If the medical product is removed from the sterilization bag for spraying, then spray applicability is improved, but the sterilization process becomes more complex and time-consuming
Solution Approach 1:
The process is segmented into spray preparation phase and sterilization phase, where spraying occurs during product loading before bag sealing. This eliminates the need for removal and repositioning operations, reducing process complexity while maintaining spray accessibility.
Solution Approach 2:
Spraying is performed as a preliminary action during the product loading phase, before the bag is sealed. This integrates the spraying operation into the existing loading workflow without requiring additional removal or repositioning steps.
4Reliability
If the medical product is sprayed before sterilization, then inner sides can be adequately treated, but the product must be handled multiple times
Solution Approach 1:
The spraying operation is merged with the product loading operation. The medical product is sprayed with sterilizing media while being positioned in the sterilization bag, combining two operations into one continuous workflow without additional handling steps.
Solution Approach 2:
Spraying is performed as a preliminary action during the loading phase, utilizing the time when the product is already being positioned in the bag. This eliminates the need for separate handling operations to access inner surfaces.
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 device achieves precise and uniform media distribution with adjustable spray patterns, suitable for narrow medical products, allowing for deep penetration and easy cleaning, while preventing droplet detachment and ensuring reliable sealing.
Implementation Method 1
a spray nozzle (30) for spraying a liquid or gaseous sterilizing media onto the inner sides of the medical product
Data Source
Figure 1~2
Figure 3~4E
Figure 5~6
AI summary
The invention relates to a device (10) for spraying or applying a medium using an auxiliary gas in the form of compressed air or a pressurized inert gas, more particularly to the inner sides of medical products or vessels, said device having a binary nozzle (1) formed from at least two cannulae (2, 3) which are inserted into each other and have a substantially constant diameter over the longitudinal extent thereof, having a nozzle body (4) which is designed as a holder for the binary nozzle (1) and has at least one inlet (11, 12) each for the medium and for compressed air or an inert gas, wherein clamping inserts (5, 6) adapted to receptacles (7, 8) are arranged on the nozzle body (4) to sealingly hold and fix an internal cannula (2) and an external cannula (3), wherein the clamping inserts (5, 6) are provided for securing the cannulae (2, 3) inserted into each other with the formation of a predefined gap (14) between the inner cannula (2) and the outer cannula (3).