Hand Vacuum Cleaner with Openable Rear Airflow Door for Motor Access
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Solution Overview
Problem
Existing surface cleaning apparatuses face limitations in mobility and usability, particularly in smaller or crowded areas, as upright vacuum cleaners are cumbersome and canister vacuum cleaners require separate movement of the canister body, adding an extra step during cleaning.
Innovation Solution
A surface cleaning apparatus comprising a portable cleaning unit with a suction motor operable on DC power, removably mounted on a wheeled base with an AC suction motor, allowing for increased airflow when mounted and reduced weight when portable, along with a removable dirt collection chamber and flexible hose for enhanced maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an AC suction motor is used in the wheeled base to provide higher airflow, then cleanability is improved, but the device becomes less portable when removed from the base
Solution Approach 1:
The vacuum cleaner is divided into two functional parts: a wheeled base containing the AC suction motor for stationary high-power operation, and a portable cleaning unit with a DC motor for mobile low-power operation. This segmentation allows each part to be optimized for its specific use case, resolving the contradiction between high airflow performance and portability.
2Productivity
If a larger suction motor is used to increase airflow, then cleaning performance is improved, but the weight increases making it harder to carry
Solution Approach 1:
Different motor sizes are used in different locations/contexts: a large AC motor is installed in the stationary wheeled base where weight is not an issue, while a small DC motor is installed in the portable cleaning unit where weight directly impacts usability. This local differentiation of quality resolves the contradiction between airflow performance and weight.
3Productivity
If the cleaning unit is designed for high airflow when mounted on the base, then cleaning efficiency is improved, but the velocity of airflow decreases when removed from the base
Solution Approach 1:
The system dynamically adapts its configuration based on operational mode: when mounted on the wheeled base, the airflow path is optimized for high volume/low velocity to maximize cleaning efficiency; when removed and used portably, the airflow path switches to optimize for higher velocity with the smaller DC motor. This dynamic adaptation resolves the contradiction between cleaning efficiency and airflow velocity.
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
The design provides increased maneuverability and usability by allowing the surface cleaning apparatus to be used as both a wheeled and hand-carriable device, with improved airflow and reduced weight, facilitating efficient cleaning in various environments without the need to carry the motor when emptying the dirt collection chamber.
Implementation Method 1
the suction motor in the portable cleaning unit may be operable on DC power... the AC suction motor may be operated, e.g. on AC current, and used to draw air through an airflow path
Data Source
AI summary
A hand vacuum cleaner is provided with an openable door that opens an air flow passage that extends rearwardly from an air treatment member to a suction motor.