Electric vacuum cleaner and hand dryer
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Solution Overview
Problem
Existing electric vacuum cleaners and hand dryers face reliability issues due to dust and water exposure causing short circuits in the controller and battery, as airflow from the blower can contain debris and moisture, leading to adherence and corrosion.
Innovation Solution
The design separates the battery and controller from the airflow path by housing them in a second chamber, while the electric blower is in a first chamber, with a wall blocking air flow between the two, preventing direct exposure to dust and water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the controller substrate is disposed in the airflow path to downsize the electric vacuum cleaner, then the device size is reduced and cooling efficiency is improved, but dust and water droplets may adhere to the substrate causing short circuits and reliability decrease
Solution Approach 1:
The housing is divided into a first chamber containing the electric blower and a second chamber containing the battery and controller. This segmentation separates the airflow path from the controller substrate, preventing dust and water adhesion while maintaining a compact overall device structure.
Solution Approach 2:
A wall is introduced as an intermediary barrier between the first chamber (airflow path) and the second chamber (controller location). This wall prevents direct contact between contaminants in the airflow and the controller substrate, resolving the reliability issue while allowing the device to remain compact.
2Ease of operation
If the battery and controller are placed in the airflow path for compact design, then portability is enhanced, but exposure to dust and moisture increases the risk of short circuits
Solution Approach 1:
The housing is segmented into two chambers: the first chamber for the electric blower and airflow, and the second chamber for the battery and controller. This segmentation protects the battery and controller from dust and water exposure while maintaining a compact, portable device design.
Solution Approach 2:
The battery and controller are extracted from the airflow path and placed in a separate second chamber. This extraction removes them from the harmful environment of dust and moisture while keeping the overall device compact and portable.
Data Source
AI summary
A reliable electric vacuum cleaner is provided. An electric vacuum cleaner includes a housing, an electric blower, a battery, and a controller. The housing includes a first chamber, a second chamber, and a handle. The battery is held in the second chamber and supplies electric power for driving the electric blower. The controller controls the electric blower. A first distance from the handle to the battery is shorter than a second distance from the handle to the electric blower.