Blower Housing Airflow Layout for Integrated Component Cooling
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Solution Overview
Problem
Outdoor power equipment, particularly handheld devices, face challenges in cooling components like batteries and electric motors due to heat generation, which can lead to device malfunction, and existing solutions often increase size, cost, and complexity with additional cooling structures.
Innovation Solution
The implementation of a structure that utilizes underpressure and overpressure regions created by the blower's operation to divert and draw air through the device, effectively cooling components such as batteries, control circuitry, and motors without the need for extra fans or cooling structures, by incorporating inlet and outlet apertures in the housing to facilitate airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If additional fans or cooling structures are added to cool components, then cooling effectiveness is improved, but device size, cost, and complexity increase
Solution Approach 1:
The blower is designed to perform dual functions: generating airflow for the blower tube and providing cooling airflow for internal components (motor, battery, control circuitry) through integrated airflow pathways and apertures in the housing, eliminating the need for separate cooling fans
Solution Approach 2:
The cooling system is merged with the blower system by using the same motor-driven fan assembly to generate airflow that is directed through housing apertures to cool internal components, combining two functions into one integrated system
2Temperature
If additional fans or cooling structures are added to cool components, then cooling effectiveness is improved, but device size increases
Solution Approach 1:
The blower performs dual functions as both the primary airflow generator and the cooling system, using the same motor and fan assembly to serve both purposes, thereby avoiding the volume increase that would result from adding separate cooling components
Solution Approach 2:
The cooling airflow pathways are nested within the existing blower housing structure, with apertures and channels integrated into the housing to guide cooling air through component areas without requiring external cooling structures
3Temperature
If additional cooling structures are added to cool components, then cooling effectiveness is improved, but manufacturing cost increases
Solution Approach 1:
The blower motor serves dual purposes as both the drive motor and the cooling fan motor, eliminating the need to manufacture and assemble separate cooling fans, thereby reducing manufacturing cost
Solution Approach 2:
The cooling system is merged with the blower housing and existing components, using integrated airflow pathways and apertures in the housing rather than separate cooling assemblies, reducing the number of parts and assembly steps
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 approach enhances the reliability of outdoor power equipment by maintaining component temperatures within safe limits without increasing size, cost, or complexity, thereby ensuring continuous operation and improved performance.
Implementation Method 1
The rotation of the fan assembly may create an underpressure region in an inlet portion and an overpressure region at a main channel of the fan assembly
Implementation Method 2
drawing air into the inlet portion through a control unit housing portion of a housing of the blower to cool a control unit of the blower
Data Source
AI summary
A method of cooling blower components may include rotating a fan assembly (160) responsive to operation of a motor (120). The rotation of the fan assembly may create an underpressure region in an inlet portion (154) and an overpressure region at a main channel (340) of the fan assembly (160). The method may further include drawing air into the inlet portion (154) through a control unit housing portion (132) of a housing (110) of the blower (100) to cool a control unit (130) of the blower (100), drawing air into the inlet portion (154) through a battery compartment (142) to cool a battery (140) of the blower (100), and pushing air from the main channel (340) through a motor housing (320) to cool the motor (120).