Robot Debris Bin Flap and Evacuation Station Pressure Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cleaning robots face challenges in efficiently evacuating debris from their bins without causing damage or reducing air flow efficiency, and existing evacuation stations require manual manipulation of bags and may not adaptively control evacuation time effectively.
Innovation Solution
A mobile robot with a debris bin featuring a semi-spherical support structure and a flap door mechanism that opens in response to air pressure, combined with an evacuation station that uses negative air pressure and a MEMS pressure sensor to control the evacuation time based on monitored air pressure, ensuring efficient debris removal and minimizing user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional door mechanism is used on the debris bin, then the structure is simple, but the door may contact external objects causing damage or blocking air flow when open
Solution Approach 1:
The door unit is nested within the exterior surface of the mobile robot, with the flap contained inside a recessed cavity. This nesting arrangement ensures that even when the flap is in the open position, it remains enclosed and cannot contact external objects or block air flow, resolving the contradiction between reliability and complexity.
Solution Approach 2:
The door mechanism transitions from a traditional planar door to a three-dimensional flap system that moves within a vertical cavity. The flap can rotate between closed and open positions while remaining confined within the recessed space, allowing air flow unobstructed while maintaining structural simplicity.
2Extent of automation
If manual bag manipulation is required at the evacuation station, then the device structure is simple, but user intervention increases operation complexity
Solution Approach 1:
The evacuation system is designed to automatically evacuate debris from the robot's debris bin without requiring manual bag manipulation. The motor-driven evacuation mechanism and pressure sensor create negative pressure to automatically suction debris into the bag, making the system self-servicing and reducing user intervention.
Solution Approach 2:
The manual mechanical operation of bag manipulation is replaced by a motor-driven pneumatic system. The motor creates negative air pressure through the conduit system to automatically evacuate debris, substituting mechanical user action with an automated electromechanical system.
3Use of energy by moving object
If fixed evacuation time is used, then the control system is simple, but power efficiency and noise reduction are compromised
Solution Approach 1:
The control system uses a pressure sensor to monitor air pressure during evacuation and provides feedback to the motor controller. Based on this feedback, the system adaptively adjusts the evacuation time and motor operation, stopping when the debris bin is empty or the bag is full, thereby improving power efficiency and reducing noise while maintaining simple control logic.
Solution Approach 2:
The evacuation process dynamically changes operational parameters based on real-time pressure readings. The motor speed and evacuation duration are adjusted according to the monitored air pressure conditions, allowing the system to optimize power consumption and noise levels while adapting to varying debris loads and evacuation progress.
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 allows for efficient debris evacuation without contact damage, improves air flow, reduces user manipulation, and adaptively controls evacuation time to enhance power efficiency and reduce noise.
Implementation Method 1
a flap configured to move, in response to air pressure at the exhaust port, between a closed position to cover the exhaust port and an open position to open a path between the chamber and the exhaust port
Implementation Method 2
a motor that is responsive to commands from the control system to remove air from the canister and thereby generate negative air pressure in the canister to evacuate the debris bin by suctioning the debris from the debris bin
Implementation Method 3
evacuate the debris bin by suctioning the debris from the debris bin
Implementation Method 4
a pressure sensor to monitor the air pressure. The control system is programmed to control an amount of time to evacuate the debris bin based on the air pressure monitored by the pressure sensor
Data Source
AI summary
A mobile robot includes a body configured to traverse a surface and to receive debris from the surface, and a debris bin within the body. The debris bin includes a chamber to hold the debris received by the mobile robot, an exhaust port through which the debris exits the debris bin; and a door unit over the exhaust port. The door unit includes a flap configured to move, in response to air pressure at the exhaust port, between a closed position to cover the exhaust port and an open position to open a path between the chamber and the exhaust port. The door unit, including the flap in the open position and in the closed position, is within an exterior surface of the mobile robot.