Handheld Spray Nozzle External Atomization
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Solution Overview
Problem
Existing hand-held dispensing devices for sprayable media, such as makeup, often suffer from nozzle clogging due to drying out, uneven application, and are not suitable for portable use due to size and design limitations.
Innovation Solution
A hand-held dispensing device with a spray head featuring two nozzles arranged in a specific configuration to create an atomization zone outside the spray head, utilizing the Bernoulli effect for fine atomization and even application, preventing nozzle drying and clogging by positioning them outside the spray head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the nozzle is positioned inside the spray head housing, then the device structure is compact, but the nozzle becomes clogged due to fluid drying out
Solution Approach 1:
The patent extracts the nozzles from the interior of the spray head housing and positions them on the outer surface. This allows the nozzles to be exposed to ambient air, preventing fluid drying and clogging while maintaining a compact overall device structure. The housing volume remains reduced while the critical nozzle function is improved through external positioning.
2Device complexity
If a single nozzle is used, then the device structure is simple, but the application is uneven
Solution Approach 1:
The patent divides the single nozzle into multiple nozzles (first nozzle and second nozzle) with different orientations. The first nozzle directs fluid in a first direction while the second nozzle directs fluid in a second direction, creating overlapping spray patterns that ensure even application coverage. This segmentation improves application uniformity while keeping each individual nozzle simple in structure.
Solution Approach 2:
The patent employs asymmetric nozzle arrangements where the first and second nozzles are oriented at different angles relative to the device axis. This asymmetric configuration creates complementary spray patterns that cover different areas, resulting in more uniform overall application compared to symmetric single-nozzle designs.
3Volume of moving object
If the atomization zone is inside the housing, then the device is compact, but the spray quality is insufficient
Solution Approach 1:
The patent positions the atomization zone at the boundary between the housing interior and exterior, with nozzles oriented to create spray overlap in three-dimensional space. This spatial arrangement allows sufficient atomization distance and air mixing while maintaining a compact housing volume, achieving both good spray quality and device portability.
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
Enables fine and even spraying of fluids or powders, preventing nozzle clogging and allowing for targeted application, with the device being compact enough for portable use.
Implementation Method 1
By aligning the two nozzles in this way with respect to one another, an atomization zone for the fluid or powder to be applied can be formed, which enables fine atomization of the fluid or powder to be sprayed. By aligning the two nozzles with one another, a flow around the second nozzle is achieved, which produces a Bernoulli effect at the outlet opening of the second nozzle.
Data Source
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AI summary
The invention relates to a dispensing device (11) for spraying a sprayable medium, in particular fluid or powder, which is designed as a hand-held apparatus, in which a compressed-air apparatus (86) is provided, said dispensing device comprising a spray head (14) for dispensing the medium, which spray head is connected to the housing (12), a fluid line (44), which leads from a reservoir (41) to the spray head (14), a supply line (36), which leads from the compressed-air apparatus (86) to the spray head (14), a first nozzle (38), which is connected to the supply line (36), and, separate therefrom, a second nozzle (46), which is connected to the fluid line (44) and which protrudes into an air flow exiting the first nozzle (38) such that an atomizing zone (49) is formed outside of the spray head (14), the second nozzle (46) overlapping an inner cross-section of the first nozzle (38) by at least 1% in a plan view of an outlet opening (83) of the first nozzle (38).