Fastener Driver Cooling Layout With Separate Airflow Paths
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Solution Overview
Problem
Powered fastener drivers generate significant heat due to motors and electrical components, which can lead to thermal management issues and potential performance degradation.
Innovation Solution
The implementation of separate airflow paths within the motor housing and battery receptacle portions, utilizing impellers to generate airflow that isolates and dissipates heat from heat-generating components, such as FETs, through distinct airflow channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If motors and electrical components are used to power the fastener driver, then the tool can perform mechanical work to drive fasteners, but significant heat is generated causing thermal management issues and potential performance degradation
Solution Approach 1:
The housing is divided into separate airflow paths: a first airflow path for the motor housing portion and a second airflow path for the battery receptacle portion. This segmentation allows independent cooling of heat-generating components (motor and electrical components) without thermal interference, resolving the contradiction between maintaining high power output and managing heat generation.
Solution Approach 2:
Impellers are used to generate controlled airflow through pneumatic means. The impeller in the motor housing portion generates airflow to cool the motor, while another impeller in the battery receptacle portion generates airflow to cool electrical components. This pneumatic cooling system effectively dissipates heat while maintaining power output.
2Device complexity
If heat-generating electrical components are housed in the same compartment as the motor, then device complexity is reduced, but thermal interference and performance degradation occur
Solution Approach 1:
The housing is segmented into distinct airflow zones with separate cooling paths. The motor housing portion and battery receptacle portion each have dedicated impellers and airflow channels, preventing thermal interference between components while maintaining a relatively simple overall device structure.
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
Effectively isolates and dissipates heat from both the motor and electrical components, maintaining tool performance and preventing thermal damage.
Implementation Method 1
The impeller is configured to generate airflow in a first airflow path within the motor housing portion and airflow in a second airflow path within the battery receptacle portion
Implementation Method 2
utilizing impellers to generate airflow that isolates and dissipates heat from heat-generating components, such as FETs, through distinct airflow channels
Data Source
AI summary
A power tool with a housing, a motor, and a printed circuit board. The housing includes a motor housing portion and a battery receptacle portion separate from the motor housing portion. The motor is coupled to and configured to drive a working element and at least one impeller, the motor positioned at least partially within the motor housing portion, the battery receptacle portion including a receptacle configured to receive a battery pack to provide electrical current to the motor. The printed circuit board includes a heat-generating electrical component, the printed circuit board positioned within the battery receptacle portion. The at least one impeller is configured to generate airflow in a first airflow path within the motor housing portion and airflow in a second airflow path within the battery receptacle portion, the first airflow path and second airflow path being separate from one another.