Automatic Faucet Sensor Water Discharge Control
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Solution Overview
Problem
Automatic water faucet devices often result in unnecessary water discharge when no one is present and fail to discharge water when someone is nearby, leading to dirt sticking to the basin and being difficult to remove.
Innovation Solution
An automatic water faucet device with a sensor that initiates a first water discharge when an object is detected and a second water discharge when the object is no longer detected, with the second discharge stopping after the first discharge has stopped, to prevent dirt from drying and sticking while minimizing unnecessary water use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water is discharged continuously to prevent dirt from sticking, then cleanliness is improved, but unnecessary water discharge increases
Solution Approach 1:
The system performs a preliminary water discharge action when the sensor detects that a person has left the detection range. This preliminary action flushes dirt before it can dry and stick to the basin, preventing the need for continuous water discharge while maintaining cleanliness.
Solution Approach 2:
Instead of continuous water discharge, the system uses periodic discharge actions triggered by sensor detection events. Water is discharged at specific intervals when needed (when dirt accumulation is detected), rather than continuously, thereby reducing overall water consumption while maintaining cleaning effectiveness.
2Loss of substance
If water discharge is triggered by sensor detection, then unnecessary water discharge is reduced, but dirt may stick to the basin when no one is present
Solution Approach 1:
The system uses sensor feedback to detect when a person leaves the detection range and triggers water discharge accordingly. This feedback mechanism ensures water is discharged at the appropriate moment to prevent dirt sticking, while avoiding unnecessary discharge when no one is present, thus balancing water consumption with cleanliness maintenance.
3Reliability
If the second water discharge starts immediately when the object is no longer detected, then dirt prevention is improved, but water discharge timing may conflict with user presence
Solution Approach 1:
The second water discharge is triggered as a preliminary action when the sensor detects that the object has left the detection range. This timing ensures dirt is flushed before it can accumulate, while the sensor-based triggering prevents conflict with user presence by only activating when the area is truly unoccupied.
Data Source
AI summary
An automatic water faucet device 1 for automatically discharging water when an object to be detected is detected has: a sensor 14 that detects the object; a first water discharge part 12 that performs foamy water discharge; a second water discharge part 13 that performs spray water discharge; and a controller 40 that performs control for switching between the foamy water discharge from the first water discharge part 12 and the spray water discharge from the second water discharge part 13, wherein the controller 40 performs the foamy water discharge from the first water discharge part 12 while the sensor14 detects the object, and when the sensor 14 no longer detects the object, the controller 40 stops this foamy water discharge, and thereafter performs spray water discharge from the second water discharge part 13 for a predetermined period.