Vacuum-Aided Toilet Using Venturi Ejector for Water Reduction
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Solution Overview
Problem
Conventional toilets consume excessive water for flushing and fail to effectively eliminate washroom odors, particularly in environments with poor ventilation.
Innovation Solution
A vacuum-aided toilet system that utilizes a ventilating fan to generate negative pressure within the drainage pipeline, combining with flushing water pressure and gravity to reduce water consumption and incorporate a deodorization pipeline to eliminate odors using a ventilating fan and ejector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If gravity or gravity plus siphon flushing is adopted, then the toilet can drain waste, but water consumption is excessive (7-8 liters per flush)
Solution Approach 1:
The patent applies pneumatic principles by introducing a vacuum device that creates negative pressure in the drainage pipeline. This negative pressure assists the gravity-driven flow, enabling effective waste removal with significantly reduced water consumption. The vacuum device generates suction that complements the gravitational force, allowing the system to maintain reliable draining capability while using only 0.5-1.5 liters of water per flush instead of the conventional 7-8 liters.
2Object-affected harmful factors
If natural ventilation is used in high buildings, then the washroom odor can be discharged, but the exhaust port is small and narrow resulting in poor ventilation effect
Solution Approach 1:
The patent utilizes pneumatic principles through the vacuum device and ejector system to actively remove odor from the washroom. The vacuum device creates negative pressure that draws odor away from the toilet bowl, while the ejector uses compressed air to generate a vacuum that enhances the deodorization effect. This active pneumatic system overcomes the limitations of natural ventilation in high-rise buildings with restricted exhaust ports, effectively eliminating odor without requiring complex structural modifications to the building's ventilation infrastructure.
3Reliability
If an ejector with independent compressed air source is used for vacuum generation, then negative pressure can be generated in drainage pipeline, but usage environment and condition are strictly limited
Solution Approach 1:
The patent enhances versatility by integrating multiple functions into a unified system. The vacuum device serves dual purposes: generating negative pressure for assisted draining and supporting the deodorization function. The ejector can operate with compressed air from various sources (independent compressed air sources, building air supply systems, or portable compressors), making the system adaptable to different installation environments. This multi-functional design allows the toilet to be installed in diverse settings including high-rise buildings, locations with limited water supply, and areas with varying compressed air availability.
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 system effectively reduces water consumption and improves indoor air quality by efficiently flushing and deodorizing the toilet bowl, eliminating the need for large water volumes and enhancing ventilation.
Implementation Method 1
uses the air at the ventilation port of the ventilating fan as the working medium of an air ejector, such that certain negative pressure is generated inside a draining pipeline
Implementation Method 2
eliminates odor from the source of the washroom odor by using a ventilating fan
Implementation Method 3
draining under the common action of flushing water pressure, excretion gravity, and aided negative pressure
Data Source
AI summary
A vacuum-aided toilet comprises a toilet bowl, a deodorization pipeline, a flushing pipeline, a sensing switch (4) and a control device. A flushing port of the toilet bowl is communicated with the deodorization pipeline. The deodorization pipeline is communicated to a vacuum device. Inside the toilet bowl are provided a trap I (1.1), a trap II (1.2) and a draining port (1.3). The flushing pipeline being connected to the flushing port of the toilet bowl and the trap II (1.2), respectively. The sensing switch (4) is connected to a control device, which controls the deodorization pipeline and the flushing pipeline. An ejector (2.4) mounted on an air discharge pipeline (2.5) is directly driven by gas from an air outlet of a ventilating fan (2.2), so that vacuum is produced in a draining pipe. Thus the vacuum-aided toilet can save water and get rid of the odor.