Water consuming appliance and a method for operating the same
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Solution Overview
Problem
Water heater appliances often experience fault conditions such as malfunctioning water inlet valves and drain pumps, leading to excessive water accumulation and potential flooding in water consuming appliances, which existing systems fail to effectively prevent.
Innovation Solution
A water supply system with a safety shutoff valve on the supply conduit that communicates with water consuming appliances to stop the flow of heated water when a fault condition is detected, preventing excessive water accumulation and flooding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water inlet valves and drain pumps are used in water consuming appliances, then water flow control and drainage functions are improved, but fault conditions occur more frequently leading to excessive water accumulation
Solution Approach 1:
The safety shutoff valve is positioned upstream in the water supply system to preemptively stop water flow before fault conditions can lead to excessive accumulation. The valve receives fault indications from the water consuming appliance and shuts off water supply in advance, preventing the harmful effect of water overflow before it occurs.
Solution Approach 2:
The safety shutoff valve acts as an intermediary component between the water heater and the water consuming appliance. It mediates the water flow by receiving control signals from the appliance's communication module and adjusting the valve position accordingly, thereby protecting the appliance from fault-induced water accumulation without requiring direct modification of the appliance's internal components.
2Reliability
If safety shutoff valve is added to stop water flow during fault conditions, then water accumulation prevention is improved, but device complexity increases
Solution Approach 1:
The safety shutoff valve integrates multiple functions: it serves as both a normal water flow control valve and a safety protection device. The valve's actuator can receive control signals from the water consuming appliance's communication module to shut off water flow during fault conditions, while also being controllable from the water heater system. This multi-functionality reduces the need for separate dedicated safety devices.
Solution Approach 2:
The system implements feedback control where the water consuming appliance's communication module monitors its own operational status and sends fault condition signals back to the safety shutoff valve. This feedback loop enables the valve to automatically respond to appliance conditions and adjust water flow accordingly, creating a self-regulating safety mechanism that reduces overall system complexity.
Data Source
AI summary
A system and method of operating a water supply system with one or more water consuming appliances is provided. The water supply system includes a hot water heater for supplying a flow of heated water through a supply conduit to at least one water consuming appliance. The water consuming appliance receives the flow of heated water and provides an indication of a fault condition if excessive water accumulates in the appliance, which might indicate a malfunction with a drain pump or a water supply valve. A safety shutoff valve is positioned on the supply conduit and is in operative communication with the water consuming appliance. The safety shutoff valve is configured for stopping the flow of heated water when it receives the indication of the fault condition.