Cleaning Robot Bin Filtration Layout for Low Suction Loss
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Solution Overview
Problem
Existing mobile cleaning robots face inefficiencies in debris collection and filtration, with issues such as suction loss due to gaps in the pneumatic airflow path, difficulty in removing and emptying the debris bin, and the need for frequent bin evacuation.
Innovation Solution
A mobile cleaning robot design featuring a bin with a rigid structure, internal barrier, and filter unit, along with a prescreen filter and secure handle system, which allows for precise bin positioning, reduced suction loss, easy filter replacement, and extended operating time before bin evacuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bin is made with a rigid structure and internal barrier to separate volumes, then debris collection efficiency is improved, but device complexity increases
Solution Approach 1:
The bin is divided into a first volume for collecting debris and a second volume for storing the filter unit, separated by an internal barrier. This segmentation allows debris to be collected in the first volume while the filter is housed in the second volume, improving debris collection efficiency by preventing debris from interfering with filter operation.
Solution Approach 2:
The filter unit is disposed within the second volume of the bin, and the entire bin is positioned within the mobile cleaning robot. This nesting arrangement integrates multiple functions (debris collection, filtration, and filter storage) into a compact structure, improving productivity while managing device complexity through space-efficient design.
2Ease of operation
If the filter unit is removably disposed in the airflow path, then ease of filter replacement is improved, but reliability of airflow path sealing worsens
Solution Approach 1:
The filter unit is pre-positioned in the second volume with its airflow path aligned to connect to the first volume. This preliminary arrangement ensures that when the filter is installed, the airflow path is automatically sealed and connected, making filter replacement easy while maintaining reliability through pre-configured sealing interfaces.
3Ease of operation
If the bin is designed for evacuation through the bottom of the robot, then ease of bin emptying is improved, but device complexity increases
Solution Approach 1:
The bin is designed with an evacuation mechanism that extracts debris from the first volume through the bottom of the robot. This extraction approach allows the bin to be emptied without removing the entire bin from the robot, improving ease of operation while the complexity is managed through integration with the robot's existing bottom structure.
4Ease of operation
If the handle is hingedly attached to extend above the bin top, then ease of bin handling is improved, but device complexity increases
Solution Approach 1:
The handle is hingedly attached to the top of the bin, allowing it to dynamically extend above the bin top when needed for lifting or carrying, and fold down when not in use. This dynamic configuration improves ease of bin handling while minimizing device complexity by using a simple hinge mechanism rather than a fixed or complex adjustable structure.
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 solution enhances debris collection efficiency, reduces suction loss, facilitates easy bin emptying, and prolongs operating time by ensuring precise airflow and secure filter operation.
Implementation Method 1
a filter unit supported by the internal barrier and removably disposed in an airflow path between the first volume that includes an intake port in the bin and the second volume that includes an exhaust port in the bin
Implementation Method 2
a blower affixed to the chassis, a bin supported by the chassis and configured to receive airflow from the blower
Implementation Method 3
the movable barrier being configured to open when a suction force is applied to the movable barrier from outside of the bin
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
This document describes a mobile cleaning robot including a chassis having a forward portion and an aft portion; a blower affixed to the chassis; a bin supported by the chassis and configured to receive airflow from the blower, the chassis enabling evacuation of the bin through a bottom of the robot. The bin includes a top, a bottom, a sidewall, and an internal barrier. The bin includes a first volume and a second volume separated by the internal barrier and a filter unit supported by the internal barrier and removably disposed in an airflow path between the first volume that includes an intake port in the bin and the second volume that includes an exhaust port in the bin.