Vacuum cleaner with hand nozzle
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Solution Overview
Problem
Existing stick vacuum cleaners lack the ability to perform above-floor cleaning and suffer from insufficient suction when using a hand nozzle due to split suction between the hand nozzle and floor nozzle, with flexible tubes causing power losses and increased weight.
Innovation Solution
A vacuum cleaner design featuring a hand wand that can be deployed for crevice and above-floor cleaning, with a valve that directs airflow to either the floor nozzle or hand nozzle based on the backbone's position, focusing suction through the hand nozzle when upright and allowing for efficient air flow management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hand nozzle is added to a stick vacuum cleaner for above-floor cleaning, then cleaning versatility is improved, but suction performance deteriorates due to split suction between hand nozzle and floor nozzle
Solution Approach 1:
The vacuum cleaner uses the dynamic position of the backbone (upright vs. tilted) to automatically control airflow distribution. When the backbone is in the upright position, the valve closes the floor nozzle pathway and directs all suction through the hand nozzle, enabling above-floor cleaning with full suction power. When tilted, the valve opens to restore normal floor cleaning operation.
Solution Approach 2:
The system automatically switches between cleaning modes based on the backbone position without user intervention. The valve mechanism responds to the physical state of the vacuum cleaner itself, allowing the device to self-regulate suction distribution between floor nozzle and hand nozzle based on operational context.
2Power
If a valve mechanism is added to direct airflow based on backbone position, then suction performance during hand nozzle operation is improved, but device complexity increases
Solution Approach 1:
The valve mechanism operates automatically in response to backbone position changes without requiring external control systems, sensors, or user intervention. The physical movement of the backbone directly actuates the valve through mechanical linkage, allowing the system to self-regulate airflow distribution based on its own operational state.
Solution Approach 2:
The valve acts as a mechanical intermediary that translates the physical position of the backbone into corresponding airflow path configurations. This simple mechanical mediation avoids the need for complex electronic control systems while achieving automatic suction distribution between cleaning modes.
3Ease of operation
If flexible tubes are used to connect hand nozzle to dustcup, then ease of operation is improved, but weight increases and power losses occur
Solution Approach 1:
The patent removes the flexible tube from the air pathway when the hand nozzle is not in use. The hand nozzle can be stored in the handle without requiring a continuous flexible tube connection, eliminating the weight and power loss associated with the tube while maintaining ease of operation through simple storage and deployment mechanisms.
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
Enables effective above-floor cleaning with all suction directed through the hand nozzle, reducing air flow through the flexible tube when not in use, resulting in improved cleaning performance and reduced weight.
Implementation Method 1
a valve for directing air flow to either the floor nozzle or to the hand nozzle based on the position of the vacuum cleaner's backbone relative to the floor nozzle
Data Source
AI summary
A vacuum cleaner includes a floor nozzle, a handle, a hand nozzle that can be stored at least partially in the handle, and a backbone between the floor nozzle and the handle. The vacuum cleaner further includes a motor and dustcup on the backbone. Air flow conduits define a first air flow path between the dustcup and the floor nozzle and a second air flow path between the hand nozzle and the dustcup. A flow valve is operable between an open position and a closed position based on the position of the backbone relative to the floor nozzle. When the valve is in the open position, the first air flow path is open to the floor nozzle; when the valve is in the closed position, the first air flow path is closed to the floor nozzle, focusing suction to the hand nozzle.