Handheld Power Tool Dual Vent Cooling System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Handheld power tools, such as hammer drills, face challenges in achieving effective cooling for both the electric drive motor and power supply units, particularly when using storage batteries or power supply units, which can lead to reduced performance and efficiency due to inadequate heat dissipation.
Innovation Solution
The design incorporates a dual vent system within the tool housing, where a portion of the cooling fan's airflow is directed through a second vent section within the receiving recess to force-cool the storage battery, and an inner ventilation channel in the fanless power supply unit allows for ambient cooling, eliminating the need for additional cooling fans and enabling a more compact and cost-effective power supply unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a storage battery with closed surface is used in the receiving recess, then the battery can be protected from environmental damage, but the battery cannot be effectively cooled
Solution Approach 1:
A sealing plate with sealing element is introduced as an intermediary component between the battery and the environment. The sealing plate allows controlled airflow through its design while maintaining protection, serving as a mediator that reconciles the conflicting requirements of sealed protection and active cooling.
Solution Approach 2:
The sealing element functions as a flexible component that can accommodate airflow while maintaining the protective barrier. This thin film-like structure allows thermal management through controlled permeability while preserving the protective enclosure.
2Temperature
If an additional cooling fan is installed in the power supply unit, then the power supply unit can be actively cooled, but the device complexity and cost increase
Solution Approach 1:
The cooling function is merged with the existing housing structure by integrating vent sections directly into the housing. This combines the structural enclosure with the thermal management function, eliminating the need for separate cooling components while achieving effective heat dissipation.
Solution Approach 2:
The housing structure is designed to serve multiple functions simultaneously: mechanical protection, structural support, and active cooling through integrated vent sections. This multi-functionality eliminates the need for dedicated cooling components, reducing overall system complexity.
3Ease of operation
If the receiving recess is designed for tool-free replaceable accommodation, then the battery or power supply unit can be easily changed, but the sealing and cooling integration becomes more difficult
Solution Approach 1:
The receiving recess is segmented into functional zones: a replaceable component interface area for easy battery/power supply insertion and removal, and an integrated vent section area for sealing and cooling. This segmentation allows independent optimization of each function while maintaining overall system 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 dual vent system enhances cooling capacity, allowing for improved performance and increased power output while maintaining a compact and cost-effective design for handheld power tools and power supply units.
Implementation Method 1
a volume flow generated by the cooling fan of the handheld power tool can be guided through the first vent section... a volume flow generated by the cooling fan of the handheld power tool can now be guided at least partially through the second vent section into the receiving section and be used there for cooling tasks
Data Source
AI summary
A hand-held power tool, in particular a hammer drill or combination hammer, is disclosed. The power tool includes a tool housing which has a receiving recess designed to replaceably receive a storage battery or a power supply unit. The hand-held power tool further includes an electric drive motor having a cooling fan and a first vent portion which is located on the tool housing outside the receiving recess and through which a volume flow generated by the cooling fan can be guided. The tool housing has a second vent portion which is different from the first vent portion and which is located in the receiving recess and through which the volume flow generated by the cooling fan can be at least partially guided.