Electric Blower Component Layout for Sequential Airflow Cooling
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Solution Overview
Problem
Existing electric blower configurations face challenges in effectively cooling the motor and electronic boards due to insufficient airflow, leading to potential demagnetization of rare-earth permanent magnets and increased manufacturing costs from heat sink usage.
Innovation Solution
The motor, first board, and second board are arranged in the blowing direction of the fan, allowing for efficient airflow cooling of the switching elements and other heat-generating components, while the microcomputer and other heat-sensitive components are positioned downstream to prevent liquid adhesion and maintain efficient cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the airflow is blocked by the flange to prevent liquid adhesion, then the board can be protected from liquid, but a heat sink is required increasing manufacturing cost
Solution Approach 1:
The patent applies local quality by selectively positioning components along the airflow path. The second board (containing the microcomputer) is placed downstream in the third housing section, where it is naturally protected from liquid adhesion by the airflow direction. Meanwhile, the first board with switching elements is positioned in the second section where it can be cooled efficiently. This spatial differentiation eliminates the need for additional heat sinks or protective flanges, reducing manufacturing costs while maintaining protection.
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 ensures effective cooling of heat-generating components, prevents demagnetization, and reduces manufacturing costs by optimizing airflow paths and component placement, enhancing the reliability and efficiency of electric blowers, vacuum cleaners, and hand dryers.
Implementation Method 1
both the boards are cooled by using airflow by the fan
Implementation Method 2
the motor, first board, and second board are arranged in this order in a blowing direction of the fan
Data Source
AI summary
An electric blower includes a fan, a motor to drive the fan, a first board including at least one switching element, and a second board including a microcomputer. The motor, first board, and second board are arranged in this order in a blowing direction of the fan.