Flush Tank Feeding Device Air Vent Flooding Chamber
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Solution Overview
Problem
Existing feeding devices for flush tanks suffer from noise issues due to water/air mixture formation during normal operation, and they are not simple, effective, or reliable, especially at low water supply pressures.
Innovation Solution
The air vent is positioned higher than in previous designs, creating a flooding chamber that fills with water to close the air vent, preventing backflow and reducing noise, while maintaining simplicity and reliability across varying pressure levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air outlet opening is provided in the valve assembly to prevent backflow, then backflow prevention is improved, but noise during filling increases due to water/air mixture formation
Solution Approach 1:
The invention extracts the air outlet function from the valve assembly and relocates it to the body through a separate air vent opening. This separation allows the valve assembly to focus on backflow prevention while the body's air vent manages air evacuation, preventing water/air mixture formation in the feeding device and reducing noise during filling.
2Object-affected harmful factors
If the air vent is positioned higher to create a flooding chamber, then noise reduction is improved, but device complexity increases
Solution Approach 1:
The invention merges the flooding chamber function with the existing body structure by positioning the air vent at a higher level than the outlet tube. The body itself serves as the flooding chamber, eliminating the need for separate components and maintaining construction simplicity while achieving noise reduction through proper water/air separation.
3Object-affected harmful factors
If the air vent is located at a higher level, then noise during filling is reduced, but operation at low pressure may be affected
Solution Approach 1:
The invention utilizes the vertical dimension by positioning the air vent at a higher level than the outlet tube, creating a flooding chamber that leverages gravity and pressure differential. This dimensional arrangement ensures that water naturally fills the chamber and closes the air vent during operation, maintaining reliability at low pressures without compromising 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 configuration effectively prevents water backflow, minimizes noise during tank filling, and ensures reliable operation even at low water supply pressures, enhancing the simplicity and effectiveness of the feeding device.
Implementation Method 1
the air vent (24) is formed in the body (2) and communicates with the outside of the body (2) and with the outlet conduit (8)... the flooding chamber (22) fills with water to close the air vent
Implementation Method 2
the diaphragm elastically deforms under the water pressure and puts the conduits into communication with each other, thus allowing the passage of water
Implementation Method 3
When the float, as a result of the discharge of water from the tank, falls, it opens the vent nozzle... When the float rises, it closes the vent nozzle
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A feeding device (1) for a flush tank comprises an internally hollow body (2), a valve assembly (3) housed inside the body (2) and arranged between an inlet conduit (7) and an outlet conduit (8); an air vent (24) formed in the body (2) and communicating with the outside of the body (2) and with the outlet conduit (8); and a flooding chamber (22), positioned in the body (2) and communicating with the air vent (24) and with the outlet conduit (8); the outlet tube (6) has a narrowing (35), positioned at one lower free end (20) of the outlet tube (6) so as to cause the filling of the chamber (22) with water and close the air vent (24) with a water zone.