Toilet Shower System Pump Control via Hydraulic Measurement
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Solution Overview
Problem
Existing toilet shower systems face challenges in maintaining consistent water pressure and flow rate due to changes in water pumps and pipe systems over time, leading to deviations from desired specifications, which can affect cleaning efficacy.
Innovation Solution
The system records hydraulic measurement variables during use, comparing them to reference values and adjusting the water pump's performance accordingly, with adjustments made during subsequent shower processes to maintain optimal settings, ensuring accurate and reliable water pressure and flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the water pump output is adjusted frequently to maintain desired water pressure and flow rate, then the shower intensity can be optimized, but the system complexity and response time management become more difficult
Solution Approach 1:
The system performs measurements and adjustments in advance during shower processes, preparing the water pump output before the next shower begins. This preliminary action approach allows the system to maintain reliability without requiring complex real-time control, as adjustments are made proactively rather than reactively during operation.
Solution Approach 2:
The control system operates periodically by conducting measurements and adjustments at specific intervals (during shower processes) rather than continuously. This periodic action simplifies the control logic while maintaining water pressure consistency, as the system checks and adjusts parameters at discrete moments rather than requiring constant monitoring and adjustment.
2Measurement precision
If multiple measurements are averaged to improve accuracy, then the measurement precision increases, but the time required for measurement and adjustment increases
Solution Approach 1:
The system performs multiple measurements and averaging during shower processes before adjustments are needed for the next shower. This preliminary computation of average values from multiple measurements allows the system to achieve high measurement precision without adding significant time delay, as the computational work is done in advance during the shower operation itself.
Solution Approach 2:
The system uses the shower process itself to perform measurements and computations, leveraging the existing operational time. The measurement and averaging processes occur during the shower rather than requiring separate dedicated time, allowing the system to serve its own measurement needs without external time investment.
3Speed
If the water pump output is adjusted immediately upon detecting a deviation, then the response speed increases, but unwanted oscillations may occur
Solution Approach 1:
The system prepares adjustments in advance during shower processes, setting the water pump output for the next shower before the current one ends. This preliminary adjustment approach allows the system to respond to deviations without immediate oscillatory reactions, as the adjustment is planned and executed in a controlled manner during the subsequent shower rather than instantly during the current operation.
Solution Approach 2:
The system uses periodic shower processes as natural boundaries for adjustments, separating adjustment cycles from operation cycles. This periodic structure prevents continuous feedback loops that could cause oscillations, as adjustments are made at discrete intervals between showers rather than continuously during operation.
Data Source
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AI summary
The invention relates to a toilet shower system in which a hydraulic measurement variable V' of the shower water transported by a water pump (38) is recorded and compared with a reference value in order to adjust the performance of the water pump (38) depending on the comparison.