Handle Cooling Duct Layout for Compact Handheld Blower Electronics
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Solution Overview
Problem
Handheld blowers and vacuums face challenges in achieving a compact design while maintaining efficient operation, particularly in cooling and housing space utilization for electronic components.
Innovation Solution
The blower and/or vacuum design relocates electronic components, such as control units, to the handle, incorporating a cooling air duct that channels cooling air flow to efficiently cool these components, allowing for a more compact housing base body and improved airflow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If electronic components are housed in the housing base body, then the device structure is simple, but the housing base body becomes bulky and airflow efficiency decreases
Solution Approach 1:
The device is segmented into two functional zones: the housing base body for the blower unit and the handle for electronic components. This spatial segmentation allows the housing base body to maintain a compact, airflow-optimized design while the handle accommodates electronic components that would otherwise bulk up the main housing.
Solution Approach 2:
Electronic components are relocated from the horizontal plane of the housing base body to the vertical handle structure. This dimensional transition allows components to be positioned in an otherwise underutilized space without affecting the housing base body's compactness or airflow characteristics.
2Volume of moving object
If electronic components are relocated to the handle, then the housing base body becomes more compact, but the handle structure becomes more complex
Solution Approach 1:
The handle is designed as a multi-functional element: it serves as the carrying handle, houses electronic components (control unit, circuit board), provides structural support, and acts as an air duct for cooling. This consolidation of multiple functions into a single structural element avoids increasing overall device complexity.
Solution Approach 2:
The cooling air duct is merged with the handle structure itself rather than being a separate component. The handle walls form the duct boundaries, integrating the cooling function into the existing handle geometry without adding separate ducting systems.
3Device complexity
If the handle is used only as a carrying handle, then the structure is simple, but no space is available for electronic components and cooling
Solution Approach 1:
The handle is transformed from a single-function carrying element into a multi-functional component that simultaneously provides structural support, houses electronic components, and serves as a cooling air duct. This increases space utilization without proportionally increasing complexity.
Solution Approach 2:
Electronic components are nested within the hollow interior of the handle structure. The control unit and circuit board are positioned inside the handle's internal volume, utilizing the space that would otherwise be empty while maintaining the handle's external dimensions and carrying function.
4Device complexity
If electronic components are cooled by ambient air, then the cooling system is simple, but prolonged operation causes overheating
Solution Approach 1:
The cooling system uses the device's own operational resources (the blower unit's air output) to cool the electronic components. The blower unit generates pressurized air that is redirected through the handle to cool electronics, eliminating the need for separate cooling fans or external cooling systems.
Solution Approach 2:
Instead of discarding the pressurized air from the blower unit as waste, the system recovers and redirects this air flow through the handle to cool electronic components. This repurposes an otherwise wasted resource for the beneficial purpose of thermal management.
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 design enables efficient cooling of electronic components, facilitating a more compact and user-friendly handheld device with enhanced operational efficiency and ease of handling.
Implementation Method 1
a cooling air flow flows from the inlet opening of the handle to the outlet opening of the cooling air duct... this electronic structural unit is cooled by the cooling air flow
Data Source
AI summary
A handheld blower and/or vacuum has a housing base body with a main flow duct in which a fan is arranged and through which main air flow flows when the blower is in operation. The housing has a handle having a cooling air duct that extends from an inlet opening on the main flow duct via a holding section of the handle up to an outlet opening. The inlet opening is assigned to a first end of the handle. When the blower is in operation, cooling air flow flows from the inlet opening of the handle to the outlet opening of the cooling air duct. An electronic structural unit is arranged in the handle in such a way that this electronic structural unit is cooled by the cooling air flow when the blower is in operation.