Hot water unit fluid supply control system and method
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Solution Overview
Problem
Existing systems for controlling fluid supply to hot water units often fail to ensure safe and reliable hot water provision, as they do not effectively manage the transition between rainwater and potable water sources, particularly concerning water quality and temperature standards.
Innovation Solution
A hot water unit fluid supply control system that includes a switching device and a control unit, which selectively switches between rainwater and potable water sources based on sensor-determined fluid characteristics and UV treatment effectiveness, ensuring safe and reliable hot water supply by maintaining appropriate temperature and quality standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If rainwater is used as a water source for the hot water unit, then water conservation is improved, but water quality safety deteriorates due to risk of using untreated rainwater
Solution Approach 1:
A switching device is introduced as an intermediary component between the rainwater tank and the hot water unit. This switching device selectively controls fluid supply based on sensor feedback, acting as a mediator that ensures only treated or suitable rainwater reaches the hot water unit, thereby maintaining water quality safety while enabling rainwater conservation
Solution Approach 2:
Sensors are implemented to detect fluid characteristics (such as temperature, quality parameters) and provide feedback to the control system. This feedback mechanism allows the system to monitor rainwater quality in real-time and adjust the switching device accordingly, ensuring that only water meeting safety standards is supplied to the hot water unit
2Reliability
If switching between rainwater and potable water sources is implemented, then water supply reliability is improved, but system complexity increases due to switching device and control mechanisms
Solution Approach 1:
The switching device is designed with multi-functionality, serving both as a selection mechanism for water sources and as a control element that responds to sensor feedback. This universal component handles both rainwater and potable water supply routes, reducing the need for separate complex control systems for each water source
3Reliability
If sensor-based control is used to monitor fluid characteristics, then water quality safety is improved, but energy consumption increases due to continuous monitoring and pumping
Solution Approach 1:
Instead of continuous monitoring, the system employs periodic sensing and intermittent pumping operations. The control system activates sensors and pumps only when needed based on predetermined conditions or time intervals, reducing energy consumption while maintaining adequate water quality monitoring through strategically placed sensors
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 system provides a reliable and safe hot water supply by ensuring that the water meets the required standards, mitigating the risk of using untreated rainwater and maintaining efficient operation of the hot water unit.
Implementation Method 1
a UV treatment unit in fluid communication with the rainwater tank and the hot water unit
Implementation Method 2
a pump coupled to the rainwater tank and configured to convey fluid from the rainwater tank to the switching device
Data Source
Figure 1
Figure 2A
Figure 2B~3
AI summary
A hot water unit fluid supply control system comprises a switching device coupled to a hot water unit, a rainwater tank and a potable water source. The switching device is configured to selectively switch between a first state, which allows fluid communication between the hot water unit and the rainwater tank, and a second state, which allows fluid communication between the hot water unit and the potable water source. The hot water unit fluid supply control system comprises a control unit configured to: receive fluid characteristic information associated with fluid in the hot water unit from one or more sensors; activate or deactivate a pump of the rainwater tank based on a comparison of a fluid characteristic parameter of the fluid characteristic information with requirements of the hot water unit to thereby cause the switching device to assume the first or second state.