Flush Toilet Overflow Portion Flow Rate Control
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Solution Overview
Problem
Conventional flush toilet apparatuses with jet pump units experience variability in water flow rate due to utility water pressure, leading to inconsistent flushing performance and potential overflow, as the constant flow rate valve's variability affects the volume of water supplied to the toilet bowl.
Innovation Solution
A flush toilet apparatus with a jet pump unit and an overflow portion that allows excess water to overflow back into the reservoir tank when the flow rate exceeds a predetermined level, reducing the flow rate to the bowl portion and maintaining consistent flushing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the flow rate of water supplied to the jet nozzle is increased to improve flushing performance, then the flushing performance is improved, but water overflows from the bowl surface
Solution Approach 1:
The patent introduces a flow rate adjustment mechanism as an intermediary component between the constant flow rate valve and the jet nozzle. This mechanism actively regulates the water flow rate supplied to the jet nozzle, preventing both overflow (by limiting maximum flow) and poor flushing (by maintaining adequate flow). The intermediary device decouples the direct relationship between utility water pressure and jet nozzle flow rate, allowing independent control of flushing performance and overflow prevention.
2Object-generated harmful factors
If the flow rate of water supplied to the jet nozzle is reduced to prevent overflow, then water overflow is prevented, but flushing performance deteriorates
Solution Approach 1:
The patent implements a dynamic flow rate adjustment mechanism that can adaptively control the water flow rate supplied to the jet nozzle. Rather than using a fixed reduced flow rate, the dynamic mechanism responds to varying utility water pressure conditions, maintaining optimal flow rates within a safe range. This dynamic adjustment ensures flushing performance is maximized while preventing overflow, resolving the contradiction between the two opposing requirements.
3Device complexity
If a constant flow rate valve is used to supply water to the jet nozzle, then the flow rate is predetermined, but variability in utility water pressure causes flow rate fluctuations
Solution Approach 1:
The patent incorporates a feedback mechanism in the flow rate adjustment device that monitors the actual flow rate supplied to the jet nozzle and adjusts it accordingly. The feedback loop detects variations caused by utility water pressure changes and compensates by adjusting the flow rate through the adjustment mechanism. This closed-loop control ensures consistent flow rate delivery despite external pressure variations, improving reliability while maintaining manageable device complexity.
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 solution prevents splashing and overflow while maintaining effective flushing performance by adjusting the water flow rate based on variability in utility water pressure, ensuring reliable operation.
Implementation Method 1
a jet nozzle configured to jet the flush water into the throat pipe and suction the flush water in the reservoir tank into the throat pipe through the suction port of the throat pipe by the jet pump action
Data Source
AI summary
A flush toilet apparatus for discharging waste by a jet pump action is disclosed. The flush toilet apparatus has an overflow portion configured to overflow a portion of flush water flowing from a throat pipe into a water conduit into a reservoir tank so that when the flow rate of water flowing inside the throat pipe exceeds a predetermined specified flow rate, the flow rate of water supplied from the water conduit to a bowl portion is reduced to less than a predetermined specified flow rate.