Backpack Blower Tube Layout for Compact Space and Impact Protection
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Solution Overview
Problem
Backpack blowers face challenges in compact arrangement and protection of the blower tube components, particularly the backpack-side tube section, which affects their efficiency and durability during use.
Innovation Solution
The backpack blower design features a backpack-side tube section that extends laterally beyond the load-bearing frame with a protective ring element, allowing for a compact and space-saving arrangement while providing impact protection, and an oblique positioning of the fan axis for optimized blowing medium conducting and impact absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the backpack-side tube section is arranged compactly on the load-bearing frame, then space utilization is improved, but protection of the blower tube components deteriorates
Solution Approach 1:
The backpack-side tube section is extended laterally beyond the load-bearing frame in the transverse direction, creating a three-dimensional arrangement that optimizes both space utilization and protection. The tube section projects laterally to a extent that provides natural protection while maintaining compact overall dimensions.
Solution Approach 2:
A protective ring element is installed around the axial blower tube end termination before use, providing pre-established protection against impacts and damage. This protective measure is integrated into the design to prevent harmful effects before they occur.
2Productivity
If the fan axis is positioned obliquely, then blowing medium conducting is improved, but structural complexity increases
Solution Approach 1:
The fan axis is positioned obliquely at an angle between 1° and 30° relative to the vertical backpack transverse plane, creating an asymmetric configuration that optimizes the conducting of blowing medium. This asymmetric positioning improves airflow efficiency and productivity while the patent manages the resulting structural complexity through careful design integration.
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 enables a compact and efficient arrangement of the blower tube on the backpack, enhancing air conducting and providing comprehensive impact protection, ensuring the blower's durability and performance.
Implementation Method 1
an axial fan (6) which is driven by the drive motor (2), has an axial fan axis (6a), and is arranged in the backpack-side tube section (4a) of the blower tube (4)
Implementation Method 2
an oblique positioning of the fan axis for optimized blowing medium conducting and impact absorption
Data Source
AI summary
A backpack blower has a backpack with a load-bearing frame, a blower tube with a backpack-side tube section which is held on a rear side of the load-bearing frame, and a hand-side tube section which extends past a first side region of the load-bearing frame, a drive motor, an energy source for the drive motor, and an axial fan which is driven by the drive motor, has an axial fan axis, and is arranged in the backpack-side tube section of the blower tube. The backpack-side tube section of the blower tube runs with a main direction component in a backpack transverse direction of the load-bearing frame and has an axial blower tube end termination which projects laterally beyond a second side region of the load-bearing frame, which second side region faces away from the first side region, and/or is surrounded at least on a part of its circumference by a protective ring element which is connected to the load-bearing frame. The blower may be an electric leaf blower.