Systems and methods for a reverse thermostat
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional plumbing systems waste excessive cold water before hot water reaches plumbing fixtures, as they are designed to allow water above 100° F to flow freely, leading to inefficient hot water access.
Innovation Solution
A reverse thermostat using a heat-sensitive wax expansion element that redirects cold water from a hot water line to cold water fixtures while preventing hot water flow, employing a flow control gate that opens for cold water and closes with hot water, ensuring only cold water is delivered to fixtures that require it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional thermostats allow water above 100°F to flow freely to maintain constant operating temperature, then hot water temperature stability is improved, but excessive cold water is wasted before hot water reaches the fixture
Solution Approach 1:
The patent inverts the conventional thermostat function by creating a reverse thermostat that closes the flow control gate in response to hot water temperature (above 80°F) rather than opening it. This inversion allows the system to block hot water from traveling through cold water lines while still maintaining temperature stability at fixtures, thereby eliminating the waste of cold water that occurs in conventional systems.
2Ease of operation
If conventional thermostats allow free flow of hot water to ensure immediate hot water access, then hot water availability is improved, but cold water is wasted in the plumbing line before hot water arrives
Solution Approach 1:
The patent extracts the flow control function from the temperature mixing function. The reverse thermostat specifically controls hot water flow based on temperature detection, separating this control function from the overall water delivery system. This allows cold water to be delivered directly to fixtures without being preceded by wasted hot water flow, while still ensuring hot water is available when needed through the temperature-sensitive gate control.
3Loss of substance
If a flow control gate is used to restrict hot water flow, then cold water waste is reduced, but the system complexity increases with additional components
Solution Approach 1:
The patent utilizes parameter changes in the wax element's physical state in response to temperature changes. The wax element transitions from solid to liquid state based on water temperature, which automatically actuates the flow control gate without requiring complex electronic controls or multiple moving parts. This simple phase-change mechanism provides effective hot water flow restriction while minimizing system complexity.
4Stability of the object's composition
If conventional thermostats maintain constant temperature throughout the plumbing system, then temperature consistency is improved, but hot water must travel through entire line length wasting cold water in the process
Solution Approach 1:
The reverse thermostat performs preliminary action by controlling hot water flow at the source before it travels through the plumbing lines. By closing the flow control gate in response to hot water temperature detection, the system prevents hot water from unnecessarily traveling through cold water lines. This preliminary control ensures hot water is only delivered when and where needed, eliminating the temperature consistency issue that arises from hot water traveling through the entire line length.
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
This solution reduces water waste by redirecting cold water from hot water lines to appropriate fixtures and maintaining hot water proximity to hot water fixtures, optimizing hot water access and reducing unnecessary cold water usage.
Implementation Method 1
a heat sensitive wax expansion element transforms from a solid state to a liquid state in the presence of hot water above 80° F.
Implementation Method 2
heat sensitive wax expansion element
Data Source
AI summary
Various embodiments of a reverse thermostat for use in restricting hot water in a plumbing system from being delivered to cold water fixtures are disclosed.