Robotic Vacuum Dust Bin With Vacuum-Sealed Filters and Fullness Detection
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Solution Overview
Problem
Robotic vacuum dust bins face challenges in maximizing volume, detecting fullness, and preventing large debris entry, while existing solutions are costly and inefficient due to the need for multiple sensors and air filter maintenance.
Innovation Solution
A dust bin design with increased volume, bin-full sensors integrated into the robotic vacuum chassis, and air filters with a vacuum-assisted seal and easy access for cleaning, along with a directional locking assembly to secure the dust bin during handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If multiple sensors are added to detect both large objects and bin full status, then detection capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a universal detection system where a single optical sensor assembly mounted on the chassis can detect both large objects and bin full status by analyzing different characteristics of the reflected light. The sensor determines large objects by detecting complete blockage of the light path and determines bin full status by detecting partial reflection patterns, eliminating the need for separate sensors for each detection function.
2Object-generated harmful factors
If air filter is placed inside the dust bin, then filtration is improved, but filter maintenance becomes difficult
Solution Approach 1:
The patent segments the air filter assembly from the dust bin by providing a separate filter housing that can be independently removed. The filter assembly includes a filter element housed in a separate compartment with its own access mechanism, allowing users to remove and clean the filter without emptying or disassembling the dust bin, thus maintaining filtration quality while enabling easy maintenance.
3Ease of operation
If dust bin release handle is located on the outer perimeter, then ease of operation is improved, but reliability deteriorates due to inadvertent unlatching
Solution Approach 1:
The patent employs a composite locking mechanism that combines a release handle on the outer perimeter for ease of access with an internal detent and cam mechanism that provides positive locking. The handle operates a cam that engages with a detent on the robot body, creating a mechanical interlock that requires deliberate two-handed operation to disengage, thus maintaining ease of operation while preventing inadvertent unlatching during normal handling.
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
Enhances the robotic vacuum's cleaning capacity, provides reliable fullness detection, prevents large debris entry, and simplifies air filter maintenance, ensuring efficient operation and user convenience.
Implementation Method 1
a central impeller disposed adjacent to or under the filter frame to draw air from outside of the dust bin into the dust bin
Implementation Method 2
each filter having an overhang around a perimeter thereof that includes a sealing face to form a vacuum-assisted seal with the filter frame when air is drawn into the dust bin
Data Source
AI summary
A dust bin for a robotic vacuum comprises a dust bin frame having a cavity defined therein to receive debris, a filter frame disposed within the dust bin frame and defining two filter openings at opposite sides thereof, and a central impeller disposed adjacent to or under the filter frame to draw air from outside of the dust bin into the dust bin. The dust bin also comprises two air filters, one air filter being located on each side of the central impeller, each air filter being inserted into one of the filter openings, each filter having an overhang around a perimeter thereof that includes a sealing face to form a vacuum-assisted seal with the filter frame when air is drawn into the dust bin.