Portable Blower With Flattened Air Flow Profile
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Solution Overview
Problem
Existing portable blowers are limited by concentrated air flow that is only effective in a central area, lacking efficiency in both central and peripheral zones due to focused blowing openings.
Innovation Solution
A portable blower design with a blowing tool that modifies and directs the air flow to produce a wider, flattened, and amplified air flow by incorporating an elongated or flattened profile and secondary air intakes to expand the air flow's range and efficiency across both central and peripheral zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a traditional circular or focused blowing opening is used, then the air flow is concentrated and focused towards a central zone, but the range of action and amplitude of the air flow is limited outside the central area
Solution Approach 1:
The blowing opening is transformed from a traditional circular shape to an elongated shape with a flattened profile, changing the geometric dimensions to expand the air flow coverage from a concentrated central zone to a wider area that includes both central and peripheral zones
Solution Approach 2:
The blowing opening is divided into multiple zones (central zone and peripheral zones) with different functions, where the elongated shape allows the air flow to be distributed across these zones to achieve both concentration and wide coverage
2Area of stationary object
If the blowing opening is made thinner and more oval to define slightly wider air flows, then the central concentration is slightly mitigated, but the amplitude of the air flow remains limited and not very effective outside the central area of action
Solution Approach 1:
The geometric parameters of the blowing opening are optimized by providing an elongated shape with a flattened profile, which modifies the air flow characteristics to achieve both adequate width and maintained effectiveness across the expanded coverage area
3Area of stationary object
If a flattened profile blowing opening is used to widen the air flow, then the coverage area is increased, but the concentration and focus of the air flow in the central zone is reduced
Solution Approach 1:
The blowing opening is designed with an elongated shape that provides different local characteristics: the central zone maintains sufficient air flow concentration for effective pushing action, while the peripheral zones are extended to provide wider coverage, achieving both focus and coverage simultaneously
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 solution achieves a more effective and efficient air flow distribution, ensuring a homogeneous and accelerated air flow that covers a broader area with increased speed and coverage, enhancing cleaning efficiency in outdoor areas.
Implementation Method 1
a blowing portion (9), arranged opposite the engagement portion (8), in fluid communication with the latter to flatten the main air flow (F1) outwards according to flow directions transverse to the main flow direction (F1)
Implementation Method 2
at least one air intake (6) defined between the engagement portion (8) and the blowing portion (9) to suck, inside the blowing tool (7) and in the operating condition of the flow generator device, a secondary air flow (F2) from the outside
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A portable blower comprises: a hollow structure (2) defining a conduit (3) for the transit of an air flow between a suction zone (4) and a blowing opening (10); a flow generator device operatively arranged inside the structure (2) and/or the conduit (3) which is switchable between a non-operating condition, in which no air flow is generated along the conduit (3) of the structure (2) and an operating condition, in which a main air flow (F1) is generated along the conduit (3) of the structure (2) between the suction zone (4) and the blowing opening (10) to be concentrated centrally with respect to the blowing opening (10); a hollow blowing tool (7), removably engaged to the structure (2) of the portable blower (1) to modify and/or direct the main air flow (F1) in transit inside the conduit (3) of the latter. The blowing tool (7) has: an engagement portion (8) which is removably connected to the structure (2) to give continuity to the latter and to the conduit (3), being in fluid communication with the latter; a blowing portion (9), arranged opposite the engagement portion (8) and in fluid communication with the latter, to flatten the main air flow (F1) outwards according to flow directions transverse to the main flow direction (F1), the blowing opening (10) having an elongated shape and/or a flattened profile to transversely thin and/or longitudinally widen the air flow in output; at least one air intake (6) defined between the engagement portion (8) and the blowing portion (9) to suck, inside the blowing tool (7) and in the operating condition of the flow generator device, a secondary air flow (F2) coming from the outside. The blowing tool (7) is configured to direct the secondary air flow (F2) towards a peripheral zone (10a) of the blowing opening (10).