Air Flow Pipe Venting for Control Circuit Cooling
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Solution Overview
Problem
Existing power-operated air propelling work apparatuses, such as blower and dust collector devices, often face heat generation issues with the control circuit unit due to lack of effective cooling mechanisms, especially in larger devices where simple cooling configurations are not adequately implemented.
Innovation Solution
The apparatus incorporates an air flow pipe with an electric air propelling fan that generates pressure differences to create airflow through air passage holes, allowing air to circulate around the control circuit unit within the housing space, effectively dissipating heat without a complex cooling structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a separate cooling structure is added for the control circuit unit, then cooling effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent merges the cooling function with the existing air flow pipe structure by forming air passage holes directly in the pipe wall. The air flow pipe serves dual purposes: transporting air from inlet to outlet while simultaneously providing cooling passages for the control circuit unit through the integrated holes in its wall structure.
Solution Approach 2:
The air flow pipe is designed with multi-functionality, serving both as the main air transport conduit and as a cooling structure for the control circuit unit. The air passage holes enable the pipe to perform the additional function of directing cooling air around the control circuit unit, eliminating the need for separate cooling components.
2Temperature
If air passage holes are formed in the air flow pipe, then cooling of control circuit unit is achieved, but structural integrity may be compromised
Solution Approach 1:
The air passage holes are strategically positioned at specific locations on the air flow pipe - one hole formed upstream of the fan and another downstream, allowing cooling air to enter and exit the housing space. This localized placement provides effective cooling while maintaining the overall structural integrity of the pipe.
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 solution provides a simple and effective cooling mechanism for the control circuit unit by utilizing air pressure differences generated by the air propelling fan, ensuring efficient heat dissipation and applicability to various sizes of power-operated air propelling work apparatuses.
Implementation Method 1
causing an air flow through the air passage hole due to air pressure differences between the air flow passageway and the housing space
Implementation Method 2
air in the housing space is urged to flow around the control circuit unit
Data Source
AI summary
A power-operated air propelling work apparatus includes: an air flow pipe including an air inlet opening, an air outlet opening and a pipe wall formed between the air inlet opening and the air outlet opening to define an air flow passageway inside the pipe wall; an electric air propelling fan disposed within the air flow passageway for sucking in air from the air inlet opening and blowing out air from the air outlet opening; an apparatus housing surrounding and supporting the air flow pipe and forming a housing space between the apparatus housing and the air flow pipe; and a control circuit unit disposed within the housing space for controlling an operation of the electric air propelling fan, wherein the pipe wall is formed with an air passage hole by which the air flow passageway and the housing space communicate with each other.