Handheld Electric Cutter Airflow Cooling for Compact High-Power Use
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Solution Overview
Problem
Conventional electric working machines face challenges in miniaturization and operability during high-power operation.
Innovation Solution
The design incorporates a working portion, motor, control unit, and a guide portion that forms an air flow path to circulate air for cooling, with a fan and heat sink to manage heat, allowing efficient cooling of the control unit and motor, thereby enabling miniaturization and improved operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the housing is miniaturized, then the size is reduced, but heat dissipation becomes insufficient
Solution Approach 1:
The housing is divided into multiple sections with dedicated air flow paths for different components. The guide portion creates a separate first air flow path for the control unit, while the motor has its own cooling path, allowing independent heat management for each component within the compact housing.
Solution Approach 2:
The air flow paths are nested within the housing structure itself. The guide portion is integrated into the housing to form the first air flow path, and the motor cooling path is arranged within the same housing volume, enabling efficient heat dissipation without increasing overall housing size.
2Power
If high-power operation is enabled, then power output is increased, but heat generation increases
Solution Approach 1:
The air flow paths enable continuous cooling operation during high-power operation. Air continuously circulates through the first air flow path around the control unit and through the motor cooling path, maintaining effective heat removal throughout extended high-power operation without interruption.
Solution Approach 2:
Air acts as an intermediary cooling medium between the heat-generating components (motor and control unit) and the external environment. The guide portion structures this air flow to efficiently transfer heat from the control unit to the surrounding air, enabling sustained high-power operation.
3Temperature
If cooling structures are added, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The cooling structures are merged with the housing itself rather than being separate additions. The guide portion is integrated into the housing to form the first air flow path, and the motor cooling path utilizes the housing structure, combining thermal management functions with the structural housing components.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, contains components, and simultaneously acts as part of the cooling system through the integrated air flow paths. The guide portion both guides air flow for cooling and maintains structural integrity, reducing the need for separate cooling components.
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 achieves miniaturization of the housing and enhances operability during high-power operation by effectively managing heat and ensuring continuous operation under load.
Implementation Method 1
The first air flow path is configured to allow air to circulate therein by rotation of the motor, thereby cooling the control unit
Implementation Method 2
cooling the control unit
Data Source
AI summary
A hand-held electric working machine for cutting a work object is provided. The electric working machine comprises a working portion, a motor, a control unit, and a guide portion. The working portion is configured to cut the work object. The motor is configured to allow rotary power to be generated for allowing the working portion to drive. The control unit is configured to electrically control rotation of the motor. The guide portion is provided on the control unit, thereby forming a first air flow path surrounded by the guide portion and the control unit. The first air flow path is configured to allow air to circulate therein by rotation of the motor, thereby cooling the control unit.