Power Tool Cooling via Segmented Air Current Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric drills fail to effectively dissipate heat generated by the battery and switch during continuous use, leading to reduced service life due to overheating.
Innovation Solution
An electric drill design featuring a handle with through holes in the battery enclosure, an air current channel connecting to the environment, and a heat dissipating device near the switch, where the air current can absorb and dissipate heat from both the battery and switch before cooling the motor, utilizing an impeller and air outlets to facilitate cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the conventional cooling system only cools the motor, then the motor cooling is effective, but the battery and switch overheat during continuous use
Solution Approach 1:
The cooling system is segmented into multiple independent cooling paths: one path directs air through the motor for motor cooling, while another path directs air through the battery enclosure and switch for battery and switch cooling. This segmentation allows each component to be cooled independently according to its specific thermal requirements, resolving the contradiction between effective motor cooling and preventing battery/switch overheating.
Solution Approach 2:
Different cooling strategies are applied to different parts of the system. The motor receives direct air flow through dedicated air inlets and outlets, while the battery receives cooling through its enclosure with through-holes, and the switch is cooled by air flow through the handle. This localized cooling approach ensures each component is cooled effectively without compromising the reliability of other components.
2Loss of energy
If air inlets are provided only for motor cooling, then motor cooling is achieved, but heat from battery and switch is not dissipated
Solution Approach 1:
The air current channel serves multiple functions simultaneously: it provides a cooling path for the battery through the handle, cools the switch through the handle, and directs air to the motor for cooling. This multi-functionality allows the system to dissipate heat from multiple components without proportionally increasing structural complexity, as a single integrated air channel performs multiple cooling tasks.
Solution Approach 2:
The cooling paths for the battery, switch, and motor are merged into a single integrated air current system. Air enters through the air current channel in the handle, passes through the battery enclosure and switch, then continues to cool the motor before exiting. This merging of cooling functions into one unified system achieves comprehensive heat dissipation without requiring separate independent cooling systems for each component.
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
The enhanced cooling system effectively prevents battery and switch overheating, extending their service life and maintaining the drill's performance.
Implementation Method 1
The impeller rotates with the motor axle to produce an air current to cool the motor. The air current enters the body through air inlets and discharges through air outlets.
Implementation Method 2
A part of the cooling air current passes through the air current channel to cool the battery before getting to the motor.
Implementation Method 3
a heat dissipating device fixed to the switch absorbing heat produced by the switch; the heat dissipating device is located at least partially within the air current channel, so that the air current can take away the heat absorbed by the heat dissipating device.
Data Source
AI summary
A power tool has a handle and a body. The handle is provided with a battery. A motor is fixed inside a shell of the tool. An impeller is driven by the motor to create an air current to cool the motor and the battery. A plurality of air outlets are formed in the shell at a position corresponding to the impeller. An air current channel is formed inside the handle and the body and connected to the environment via holes in an enclosure of the battery. A part of the air current passes through the air current channel to cool the battery before reaching the motor.