Toilet Ventilation Device with Dynamic Shutter and Radial Windows
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Solution Overview
Problem
Existing ventilation systems for toilet and bathroom spaces face inefficiencies, including unnecessary air and water extraction, reverse air circulation, and water leakage, particularly when the fan is not operational.
Innovation Solution
A ventilation device mounted between the water tank and drain pipe or inserted on the drain pipe, featuring a cylindrical main body with a movable shutter, radial windows for air extraction, a counterweight to prevent water drainage, and a reversing flap to prevent backflow, ensuring efficient foul air removal without altering the drain assembly dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fan is installed in the ventilation system to extract foul air, then ventilation efficiency is improved, but reverse air circulation occurs when the fan is not operated
Solution Approach 1:
The patent employs a dynamic shutter mechanism that automatically opens during fan operation to allow exhaust air flow and closes when the fan stops to prevent reverse circulation. This dynamic response resolves the contradiction by adapting the system state based on operational conditions, ensuring both high ventilation efficiency during operation and reliable prevention of reverse flow during idle periods.
Solution Approach 2:
The shutter acts as an intermediary element between the fan-driven exhaust path and the water tank cavity. It mediates the air flow control by being actuated by the fan's operation state, allowing the system to achieve both efficient ventilation when needed and reliable sealing when the fan is off, without direct mechanical connection between the fan and sealing mechanism.
2Device complexity
If the ventilation system is integrated with the water drain assembly, then space is saved, but water leakage may occur
Solution Approach 1:
The patent segments the ventilation system into functionally independent components: the water tank cavity, the ventilation passages, the shutter mechanism, and the fan assembly. This segmentation allows each component to perform its specific function without interfering with others, particularly protecting the water seal from ventilation operations while maintaining compact integration.
Solution Approach 2:
The shutter serves as an intermediary that separates the water-filled cavity from the air extraction path. It ensures that water remains contained in the tank while allowing controlled air flow through the ventilation system, thus maintaining water seal integrity while enabling effective ventilation in an integrated design.
3Productivity
If radial windows are made in the main body for air extraction, then ventilation effectiveness is improved, but the movable shutter may be displaced by water pressure
Solution Approach 1:
The patent employs a counterweight mechanism that balances the water pressure acting on the movable shutter. The counterweight compensates for the force exerted by water through the radial windows, preventing shutter displacement while allowing it to move freely for air extraction when properly actuated, thus maintaining both ventilation effectiveness and positional stability.
Solution Approach 2:
The shutter is designed with differentiated local properties: it remains stationary under normal water pressure conditions but is capable of controlled movement when actuated by the fan operation. This local quality differentiation allows the shutter to maintain stability against water pressure while enabling effective ventilation when needed.
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 effectively ventilates the toilet cavity and bathroom spaces by preventing water leakage and ensuring one-way air flow, maintaining system integrity and efficiency even when the fan is not operating.
Implementation Method 1
A ventilation system, including a fan 23, mounted inside the water tank R, in order to create a negative pressure in order to extract the foul air from the inside of the bathrooms
Implementation Method 2
with a lane flap fitted that prevents the air from flowing in reverse when the fan is not operated
Implementation Method 3
the drainage of all water from the tank being prevented by a counterweight
Data Source
AI summary
The invention refers to the ventilation system of the WC toilet cavity that can be used to ventilate the areas designed for individual toilets and bathrooms. According to the invention, the ventilation system consists of a foul air exhaustion tubing (22) using a fan (23) and a ventilation device (D) of the WC cavity, installed between the water tank (R) and the water drainage pipe or inserted into the water drainage pipe and which is made up of a cylindrical shaped main body (1) concentrically placed in a secondary body (2) inside the main body (1). A cylindrical, fixed guard (4) is mounted at its upper side under which there is a mobile shutter slide (3) connected by a threaded rod (6) and some nuts to a stopper (5) placed at the upper end of a floater (9). The median area of the main body (1), at its upper side, is provided with some radial windows (a) through which the foul air from the toilet is exhausted outside by the secondary body (2), while at the upper side of the air circuit a T-pipe (20) with an access cover (21) is provided for the periodical cleaning of the foul air circuit on the air evacuation circuit in the reverse direction when the fan (23) is operated.