Flush Water Tank Discharge Valve Piston Return Mechanism
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Solution Overview
Problem
Existing flush water tank apparatuses require a long time to return the piston to its original position after a toilet flush operation, leading to delayed subsequent flush operations and increased complexity with the need for additional electromagnetic valves.
Innovation Solution
A flush water tank apparatus with a discharge/vacuum break valve device that uses water supply pressure to drive a piston in the discharge valve hydraulic drive portion, allowing quick discharge of water and return to the initial position by opening the upstream side to the atmosphere, thereby simplifying the mechanism and reducing the time needed for the next flush operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the gap between the rod portion and the through hole is increased to speed up water discharge, then the water discharge speed is improved, but the pressure in the cylinder is not sufficiently increased, making it difficult to push up the piston during the toilet flush operation
Solution Approach 1:
The invention divides the water discharge path into two separate functions: a narrow gap between the rod portion and through hole for pressure buildup during flush operation, and a discharge pipe with discharge pipe electromagnetic valve for rapid water discharge after piston movement. This segmentation allows each path to be optimized for its specific function without compromise.
Solution Approach 2:
The discharge pipe acts as an intermediary component that provides an alternative rapid discharge path. The discharge pipe electromagnetic valve serves as a mediator to control the timing of water discharge, allowing the system to achieve both sufficient pressure buildup and rapid discharge by coordinating the opening and closing of this intermediate discharge path.
2Speed
If a discharge pipe with discharge pipe electromagnetic valve is added to quickly discharge water in the cylinder, then the water discharge speed is improved, but the structure of the apparatus is complicated and the hydraulic cylinder device is increased in size
Solution Approach 1:
The discharge pipe electromagnetic valve is integrated into the existing water supply control system, serving dual purposes: controlling water supply to the cylinder during flush operation and enabling rapid discharge of cylinder water after piston movement. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity.
Solution Approach 2:
The invention merges the water supply control function and water discharge control function into a single integrated system using the discharge pipe electromagnetic valve. By combining these functions, the system achieves rapid water discharge capability without proportionally increasing the number of separate electromagnetic valves and control components.
3Force
If the gap between the rod portion and the through hole is made narrow to maintain piston pushing pressure, then the piston pushing force is improved, but the time to discharge water in the cylinder is increased, delaying the next flush operation
Solution Approach 1:
The system employs periodic action through the coordinated operation of the discharge pipe electromagnetic valve: the valve closes during the flush operation to maintain pressure and force piston movement, then opens after piston movement to rapidly discharge the cylinder water. This periodic switching between pressure maintenance and rapid discharge modes resolves the contradiction between maintaining force and reducing discharge time.
Solution Approach 2:
The discharge pipe electromagnetic valve is opened in advance after the piston completes its movement, preparing the rapid discharge path before the water needs to be expelled. This preliminary action ensures that when the discharge is required, the path is already ready, minimizing the time loss and allowing the next flush operation to start promptly.
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
Enables rapid return of the piston to its initial position, allowing for quicker subsequent flush operations and simplifies the mechanism by using water supply pressure and atmospheric opening to manage water flow, reducing the complexity and time required for subsequent flushes.
Implementation Method 1
a piston that is slidably disposed in the cylinder, and is configured to be moved by a pressure of the water flowing into the cylinder to move the discharge valve
Implementation Method 2
the discharge/vacuum break valve device includes a valve body that operates, when the supply of the water from the upstream side is stopped, to discharge the water flowing backward from the discharge valve hydraulic drive portion while opening the upstream side to an atmosphere
Data Source
AI summary
A flush water tank apparatus has a reservoir tank, a discharge valve, a discharge valve hydraulic drive portion configured to drive the discharge valve, and a discharge/vacuum break valve device configured to supply the water supplied from the upstream side to the discharge valve hydraulic drive portion on a downstream side. The discharge valve hydraulic drive portion includes a cylinder, and a piston configured to be moved by a pressure of the water flowing into the cylinder to move the discharge valve. The discharge/vacuum break valve device includes a valve body that operates to discharge the water flowing backward from the discharge valve hydraulic drive portion while opening the upstream side to an atmosphere when the supply of the water from the upstream side is stopped.