Remote Mixer Valve Temperature Monitoring Against Water Expansion
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Solution Overview
Problem
Digital shower and tap systems face issues due to ambient temperature differences between the mixer valve unit and the ablutionary device, leading to potential water expansion and damage from both freezing and excessive heat.
Innovation Solution
A control system with temperature sensors and a controller that generates an indicator signal when water temperatures exceed safe thresholds, allowing for preventive measures such as altering water flow or blocking device operation to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mixer valve unit is installed in a loft space or similar location, then the user interface can be located remotely from the mixer valve unit providing greater control convenience, but the ambient temperature at the mixer valve unit may be excessively high or low causing water expansion and damage
Solution Approach 1:
The controller proactively monitors water temperature and generates indicator signals before damage occurs. When abnormal temperatures are detected, the system takes preliminary protective action by blocking device operation or altering water flow, preventing the water expansion damage before it can occur.
Solution Approach 2:
The system continuously monitors water temperature and provides feedback to the controller. This feedback loop enables real-time detection of abnormal temperature conditions and triggers appropriate protective responses, maintaining system reliability while allowing remote installation.
2Adaptability or versatility
If the mixer valve unit is installed remotely in a loft space, then the ablutionary device can be supplied from a different location, but water freezing or excessive heat expansion can cause damaging pressure build-up
Solution Approach 1:
The system performs preliminary protection by monitoring water temperature and generating indicator signals before damaging expansion occurs. Protective measures such as blocking device operation or altering water flow are initiated in advance, preventing the harmful effects of water freezing or heat expansion.
Solution Approach 2:
The system converts the potentially harmful temperature conditions into useful information through temperature monitoring. The abnormal temperature readings are transformed into indicator signals that trigger protective actions, turning the harmful thermal environment into a detectable condition that enables preventive measures.
3Reliability
If temperature monitoring is continuously performed, then early detection of abnormal temperatures is achieved, but energy consumption increases
Solution Approach 1:
The controller performs temperature monitoring at periodic intervals rather than continuously. This periodic sampling approach maintains adequate temperature detection capability while significantly reducing energy consumption compared to continuous monitoring, achieving a balance between reliability and energy efficiency.
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
Prevents damage to the control system by allowing water flow to alleviate pressure or limiting device operation when ambient temperatures are outside safe ranges, thereby extending the system's lifespan and ensuring safe operation.
Implementation Method 1
one or more temperature sensors arranged to generate a respective temperature signal indicative of the temperature of any one or more of: the water supply upstream of any one or more of the valve members, and the output water down stream of the one or more valve members
Implementation Method 2
The different ambient temperature may lead to problems with water being frozen in the mixer valve unit causing damaging expansion. A similar problem can occur if temperatures are excessively high at the mixer valve unit, again causing damaging expansion of water.
Data Source
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AI summary
A control system (100) for one or more ablutionary devices (1, 7). The control system (100) comprises: a valve (118) having one or valve members each arranged to receive a respective water supply via one or more supply inlets (134, 136), and an output (138) for suppling output water to the one or more ablutionary devices (1,7) downstream of the valve (118), the one or more valve members being arranged to control the flow of water between the one or more supply inlets (134, 136) and the output (138); one or more temperature sensors (150, 154a, 154b) arranged to generate a respective temperature signal indicative of the temperature of any one or more of: the water supply upstream of any one or more of the valve members, and the output water downstream of the one or more valve members; and a controller (120) in communication with the one or more temperature sensors (150, 154a, 154b). The controller (120) is configured to: obtain one or more temperature signals from the one or more temperature sensors (150, 154a, 154b) when the one or more ablutionary devices (1, 7) are not in use; and generate an indicator signal based on a comparison of the one or more temperature signals to one or more thresholds. A method (300) performed by the control system (100) is also disclosed.