Water Heater Leak Detection Using Soluble-Material Mechanical Shutoff
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Solution Overview
Problem
Current water leak detection and shutoff systems for water heaters require electricity, making them costly and impractical for widespread implementation, especially in gas water heaters without accessible electrical connections, and are not cost-effective for universal application.
Innovation Solution
A mechanical leak detection and shutoff system using water-soluble materials like effervescent tablets that can dissolve quickly when submerged in water, triggering a spring-loaded mechanism to shut off the water supply without the need for external power, allowing for easy installation and reset without modifying electrical infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical control mechanisms are used for leak detection and shutoff, then detection reliability is improved, but system cost and complexity increase
Solution Approach 1:
The patent replaces electrical control mechanisms with a purely mechanical detection and actuation system. The float mechanism mechanically detects water level changes and directly actuates the shutoff valve through mechanical linkages, eliminating the need for electrical sensors, control boards, and actuators while maintaining reliable leak detection and response
Solution Approach 2:
The mechanical system is self-actuating through the float mechanism that automatically responds to water level changes without requiring external power sources or control systems. The system serves itself by using the physical presence of water to trigger the shutoff action through mechanical buoyancy and linkage
2Extent of automation
If electrical control mechanisms are used for leak detection and shutoff, then automated shutoff capability is improved, but ease of installation deteriorates
Solution Approach 1:
The patent eliminates electrical components that require complex installation infrastructure by using a mechanical float-based detection system and mechanical actuation system. This allows installation without electrical connections, making the system easier to manufacture and install while maintaining automated shutoff capability
Solution Approach 2:
The system requires no external power sources or electrical infrastructure for installation. The mechanical components are self-contained and can be installed independently of electrical systems, greatly simplifying the installation process for both new construction and retrofit applications
3Speed
If electrical control mechanisms are used for leak detection and shutoff, then detection speed is improved, but cost increases
Solution Approach 1:
The patent uses a mechanical float system that provides immediate physical response to water level changes, eliminating electronic signal processing delays. The mechanical linkage directly translates float movement into valve actuation, achieving fast response with simple, low-cost mechanical components
Solution Approach 2:
The mechanical components used in the system are simple, inexpensive parts that can be easily replaced if needed. The float, linkage, and valve mechanisms are basic mechanical elements that are far cheaper than electrical sensors and control systems while providing adequate response speed for leak detection
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 low-cost, universal solution for both electric and gas water heaters, effectively preventing water damage by shutting off the water supply quickly and efficiently without requiring electricity, enhancing user safety and reducing installation complexity.
Implementation Method 1
using materials with both good compression strength and fast dissolution rate, e.g., water soluble effervescent tablets
Implementation Method 2
The objective is to have a mechanism that does not require an external power source
Data Source
AI summary
The present disclosure is directed to a mechanical and powerless leak detection and shutoff system that may be used in any commercially available water heater, e.g., both gas and electric. The system includes a spring-loaded shutoff assembly having a valve member operatively coupled to a fluid inlet line of the water heater. A handle of the shutoff assembly is maintained in an open configuration via a latching mechanism until a force is applied to cause the latching mechanism to release the handle and actuate the valve member to shutoff fluid flow through the fluid inlet line. The shutoff assembly is operatively coupled to a leak detection assembly via a cable. The leak detection assembly uses a fluid-soluble material that dissolves when exposed to fluid to thereby pull the cable to apply the force to disengage the latching mechanism.