Portable Blower Variable Section Passage Channel
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing portable blowers suffer from turbulence and recirculation issues in their air flow, leading to inefficient and non-linear blowing air flow, which compromises the quality and effectiveness of the blowing process.
Innovation Solution
The portable blower features a flow generator device with a passage channel that has a variable surface area, specifically designed with reductions in section size along its length to stabilize and linearize the air flow, using a combination of frustoconical and annular shapes to optimize airflow stability and homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If passage channels with constant sections or increased sections are used at the flow generator device, then the structure is simple and easy to manufacture, but turbulence and recirculation occur compromising air flow quality
Solution Approach 1:
The passage channel is designed with locally varying cross-sectional areas, creating different flow conditions in different zones. The channel transitions from constant/increased section configurations to variable section configurations specifically in regions where flow stabilization is needed, allowing localized optimization of air flow quality without complicating the entire structure
Solution Approach 2:
The cross-sectional area parameter of the passage channel is varied along its length to control flow characteristics. By changing the section area from constant to variable configurations, the patent achieves stabilization of air flow and reduction of turbulence while maintaining manufacturing feasibility
2Device complexity
If passage channels with constant sections are used at the flow generator device, then the device complexity is low, but the air flow homogeneity and linearity are compromised
Solution Approach 1:
Rather than making the entire passage channel complex, the invention applies variable section configurations only in specific local zones where flow stabilization is required. This localized approach achieves improved air flow homogeneity while minimizing the overall increase in device complexity
3Device complexity
If conventional passage channel configurations are used, then the structure is simple, but turbulence and recirculation reduce blowing efficiency
Solution Approach 1:
The patent varies the cross-sectional area parameter along the passage channel length to optimize flow characteristics. This parameter variation stabilizes the air flow, reduces turbulence and recirculation, and improves blowing efficiency without requiring fundamentally complex structural changes
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
This configuration results in a highly efficient and linear air flow with reduced turbulence, significantly improving the quality and stability of the blowing air, enhancing the overall performance of the blower.
Implementation Method 1
the passage channel (7) having in section orthogonal to the axis (X) and in the advancement direction of the air in transit towards the blowing opening (10) of the portable blower (1) between the inlet section (S1) and the outlet section (S2), a passage section (S2, S3, S4, S5) for the flow, variable in surface, which is reduced along at least one stretch of the passage channel (7)... capable of stabilizing the air flow downstream of the flow generator device... capable of eliminating or significantly reducing turbulence and recirculation
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A portable blower (1) comprises: a structure (2), at least partially hollow, defining at least one conduit (3) for the transit of an air flow between a suction zone (4) and a blowing end (5), at which a blowing opening (10) of the portable blower (1) is defined; a flow generator device (6) operatively arranged inside the structure (2) 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 an air flow is generated along the conduit (3) of the structure (2) between the suction zone (4) and the blowing opening (10), wherein the flow generator device (6) defines a respective passage channel (7) for the air in transit extending along a longitudinal extension axis (X) of the flow generator device (6), optionally coinciding with a longitudinal axis of the structure (2) and/or of the conduit (3) of the portable blower (1), and is defined between an inlet section and an outlet section, wherein the passage channel (7) has in section orthogonal to the axis (X) and in the advancement direction of the air in transit towards the blowing opening (10) of the portable blower (1) between the inlet section and the outlet section, a passage section for the flow, variable in surface, which is reduced along at least one stretch of the passage channel (7).