Suction head for a vacuum cleaner and method of operation
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Solution Overview
Problem
Battery-powered vacuum cleaners lack the suction power and cleaning efficiency of mains-powered models due to limited motor power and battery capacity, and existing solutions for improving cleaning efficiency, such as flexible cleaning strips, do not effectively address the collection of large debris and fine dust from various surfaces.
Innovation Solution
A suction head design featuring a resilient member that acts as a seal around the recess at the front end to direct airflow close to the surface, and a movable strip with a two-stage lifting mechanism to accommodate large debris and fine dust, enhancing airflow speed and debris collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional suction head design is used, then the structure is simple, but the cleaning efficiency is insufficient for both large debris and fine dust
Solution Approach 1:
The suction head is divided into multiple functional zones: a front recess for large debris entry, side airfoils for generating suction, and a rear section for fine dust collection. This segmentation allows each zone to be optimized for specific cleaning tasks, improving overall cleaning efficiency without requiring a completely complex redesign
Solution Approach 2:
The suction head design integrates multiple functions into a single structure: the front recess handles large debris, the side airfoils generate suction for both large and fine particles, and the overall design works effectively on various surfaces including hard floors and carpets. This multi-functionality improves cleaning efficiency across different scenarios without requiring multiple separate devices
2Power
If the motor power is increased to improve suction, then the suction power increases, but the battery operating cycle is unacceptably shortened
Solution Approach 1:
The side airfoils are designed to dynamically generate suction forces as the suction head moves across the surface. This dynamic mechanism converts kinetic energy from movement into suction power, reducing the reliance on high motor power and thereby extending battery operating cycle while maintaining effective suction
Solution Approach 2:
The design utilizes pneumatic principles where the side airfoils create pressure differentials and suction forces through airflow dynamics. This pneumatic approach generates additional suction power without requiring increased motor power, thus preserving battery life while improving cleaning capability
3Productivity
If air is forced to pass underneath the suction head wall to dislodge dirt, then carpet cleaning is improved, but the impeller efficiency decreases significantly
Solution Approach 1:
Instead of forcing air horizontally underneath the suction head wall (traditional approach), the side airfoils generate suction forces in a vertical dimension that lifts particles into the airflow path. This dimensional change allows effective carpet cleaning while maintaining impeller efficiency by reducing air resistance and improving airflow utilization
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 significantly improves cleaning efficiency by ensuring that dirt and debris are effectively dislodged and collected, particularly from vertical surfaces and crevices, even with limited motor power, and maintains structural integrity and simplicity.
Implementation Method 1
the side airfoils generating suction forces to dislodge and lift dirt and debris into the airflow path
Implementation Method 2
direct airflow close to the surface
Data Source
AI summary
This invention relates to a suction head (10) for a vacuum cleaner and method of operation. The suction head (10) has a bottom surface (26) and one or more floor-engaging parts (36) adjacent to the bottom surface (26), an opening (24) in the bottom surface (26) and a rotatable brush (30) located at the opening (24). The suction head (10) has a front end (16) and a rear end (18), the front end (16) having a recess (22) in communication with the opening (24). A movable strip (42) is located in the recess (22), the movable strip (42) being movable between a first position and a second position, the bottom edge of the movable strip 4(2) being closer to the plane of the floor-engaging parts (36) in its first position than in its second position. At least one first element (54) is connected to the movable strip (42) and is able to project to the plane of the floor-engaging parts (36). At least one second element (56) is also connected to the movable strip (42), the second element(s) (56) being configured differently to the first element(s) (54), the second element(s) (56) being able to project to the plane of the floor-engaging parts (36) and being configured to move the movable strip (42) to a third position in use. The bottom edge of the movable strip (42) is closer to the plane of the floor-engaging parts (36) in its second position than in its third position. According to the method of operation, the movable strip (42) moves to its first position during backwards movement of the suction head (10) and to its third position during forwards movement of the suction head (10), the movable strip (42) moving to its third position in two stages.