Vacuum Toilet Urinal Triggering Mechanism for Noise and Safety
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Solution Overview
Problem
Conventional vacuum toilet systems with urinal functions experience significant noise emission during flushing due to airflow, which is amplified by the toilet bowl's funnel effect, and pose safety risks when a person is seated, as the suction can cause them to become stuck.
Innovation Solution
A vacuum toilet unit with a urinal function that integrates a shared vacuum valve for both toilet and urinal discharges, featuring a lockable triggering device that prevents activation when the toilet is in use, and incorporates a secondary airflow to reduce noise, eliminating the need for a separate bypass line and enhancing safety by detecting the presence of a person through sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If a shared vacuum valve is used for both toilet and urinal discharges, then system size and weight are reduced, but safety risk increases due to potential suction activation when toilet is occupied
Solution Approach 1:
The triggering device is equipped with sensors that detect toilet occupation status in advance. Before the vacuum valve can be activated, the system checks whether the toilet is occupied and prevents activation if someone is present, thus eliminating the safety risk before it can occur
Solution Approach 2:
A control system acts as an intermediary between the triggering device and the vacuum valve. This intermediary layer monitors toilet occupation status through sensors and selectively permits or blocks vacuum valve activation, thereby maintaining safety while enabling shared valve operation
2Reliability
If the triggering device is lockable to prevent activation during toilet use, then safety is improved, but device complexity increases
Solution Approach 1:
The mechanical locking mechanism is replaced with an electronic control system that uses sensors to detect toilet occupation and automatically prevents triggering device activation. This substitution reduces mechanical complexity while maintaining the safety function through intelligent control
Solution Approach 2:
The triggering device automatically monitors its own operational conditions through integrated sensors that detect whether the toilet is occupied. The system self-regulates by preventing activation when inappropriate, eliminating the need for complex external locking mechanisms
3Object-generated harmful factors
If secondary airflow is incorporated to reduce noise, then noise emission is reduced, but system complexity increases due to additional airflow paths
Solution Approach 1:
The secondary airflow system serves multiple functions: it reduces noise emission during flushing and simultaneously improves the overall flushing performance by providing additional air flow. This multi-functionality justifies the added complexity as it delivers dual benefits from a single system addition
Solution Approach 2:
The secondary airflow path is integrated with the existing vacuum toilet system architecture, merging noise reduction functionality with the primary flushing mechanism. By combining these functions into a unified system rather than separate components, the overall complexity is minimized while achieving noise reduction
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
This design reduces noise emission, minimizes system size and weight, and ensures safety by preventing suction activation when the toilet is occupied, allowing for simultaneous use of the toilet and urinal without increasing the risk of suction-related hazards.
Implementation Method 1
the transport process may usually be effected by a pressure differential between the wastewater tank and the space where the vacuum toilet is located
Implementation Method 2
During a flushing procedure, the main airflow is guided by way of the toilet unit, and the secondary airflow is guided by way of the urinal unit. In this way noise emission overall is reduced
Data Source
AI summary
A vacuum toilet unit having a urinal function with reduced noise emission, system design size and system weight, in which vacuum toilet unit a triggering device for triggering the vacuum valve is adapted in such a manner that the triggering unit may not be triggered when a sit-down toilet is in use as intended.