Modified Riser Pipe Openings for Consistent Aerosol Spray Emptying
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Solution Overview
Problem
Aerosol cans experience a decline in spray quality over time due to settling of heavier components, leading to inconsistent spray patterns and incomplete utilization of the can's contents, particularly when the fill level is low, resulting in waste and user dissatisfaction.
Innovation Solution
A pressurized can design featuring a riser pipe with an additional opening on the container side, which enlarges the cross-sectional area independently of the filling volume, ensuring consistent spray application and complete emptying by extending closer to the bottom and incorporating flexible materials to facilitate wider opening during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the fill level in the can decreases, then the can is being utilized more, but the spray pattern quality deteriorates due to droplet and agglomerate formation
Solution Approach 1:
The riser tube is segmented with multiple openings (first opening at the end face and second opening on the outer surface) instead of a single opening, allowing the system to draw from different liquid levels and maintain consistent spray quality throughout can utilization
Solution Approach 2:
The riser tube transitions from a simple vertical structure to a three-dimensional structure with openings at multiple positions and orientations, enabling it to access liquid from both the bottom (first opening) and side (second opening) of the can
2Reliability
If mechanical mixing is increased to maintain homogeneity, then spray pattern quality improves, but the device complexity and user operation requirements increase
Solution Approach 1:
The riser tube design enables the system to self-regulate liquid intake from different levels without requiring external mechanical mixing, automatically maintaining spray consistency through its multi-position opening structure
Solution Approach 2:
The riser tube is pre-configured with openings at specific positions during manufacturing, preparing the system in advance to handle varying fill levels without requiring user intervention or mechanical mixing actions
3Quantity of substance
If the riser tube extends closer to the bottom, then more spray solution can be dispensed, but the risk of drawing settled heavy components increases
Solution Approach 1:
The riser tube opening structure is divided into multiple segments (first opening at end face, second opening on outer surface) that can draw from different liquid levels, allowing the tube to extend downward while maintaining spray quality by selecting from unsettled liquid at the second opening when appropriate
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 design allows for 5-10% more spray solution to be dispensed and maintains a consistent spray pattern across varying fill levels, optimizing emptying and reducing waste by ensuring thorough utilization of the can's contents.
Implementation Method 1
the heavier components, richer in pigment and propellant, sink in the direction of gravity, while the lighter components accumulate above them
Implementation Method 2
incorporating flexible materials to facilitate wider opening during use
Implementation Method 3
the spray agent is transported from the container to the valve via the riser tube
Data Source
Figure 1A~1B
Figure 1C~2
Figure 3~4A
AI summary
The present invention relates to a pressure can (100) for dispensing a spray medium (102) and comprises a container (104) with a container wall (105) and a domed container bottom (103) for receiving the spray medium (102), a valve (101) for dispensing the spray medium when the valve is actuated, and a riser pipe (1) extending from the valve to the container bottom with a shell surface (6), a valve-side riser pipe opening (3) connected to the valve (101) and arranged on a first end face (2), and a container-side riser pipe opening (5) open towards the container and arranged on a second end face (4). The riser pipe (1) is designed to direct the spray medium from the container-side riser pipe opening (5) to the valve-side riser pipe opening, wherein the pipe (1) extends from the valve closer to the container bottom than to a container center point, and wherein the riser pipe (1) has at least one additional opening.To provide a pressure canister that can tolerate a greater variance in its use with regard to mechanical mixing, the at least one additional opening of the riser pipe (1) is designed to enlarge the cross-sectional area of the riser pipe on the container side, independent of the filling volume of the pressure canister (100). The at least one additional opening is formed by a cut (8).