Integrated Thermostatic Mixing Valve for Safe Hot Water Delivery
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Solution Overview
Problem
Many plumbing installations lack thermostatic mixing cartridges, which are essential for regulating water temperature to prevent scalding and bacterial growth, often due to installer error or cost considerations, and may not comply with plumbing codes.
Innovation Solution
A hot water valve assembly that integrates a thermostatic mixing cartridge, featuring a dual inlet housing, a concentrically disposed thermostatic mixing cartridge, an inner conduit, and a shell with a mixed water outlet, simplifying installation by eliminating the need for separate conduit routing and ensuring safe water temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate thermostatic mixing cartridge is installed prior to the faucet, then water temperature safety is improved, but installation complexity and cost increase
Solution Approach 1:
The patent combines the thermostatic mixing cartridge and the hot water valve into a single integrated assembly. The mixing cartridge is positioned within the valve housing, with its outlet connected to the valve inlet, eliminating the need for separate installation of two components and their associated conduit routing.
Solution Approach 2:
The integrated assembly performs multiple functions simultaneously: the outer shell and inlet provide valve functionality for water flow control, while the inner mixing cartridge provides temperature regulation. This multi-functional design reduces the number of separate components needed in the plumbing system.
2Reliability
If a separate thermostatic mixing cartridge is installed, then water temperature regulation is improved, but installation time increases
Solution Approach 1:
By merging the mixing cartridge and valve into one pre-assembled unit, the installation process is simplified to installing a single component rather than routing separate conduits and installing two separate devices, significantly reducing installation time.
3Reliability
If hot water is stored at very high temperatures, then bacterial growth prevention is improved, but user safety deteriorates due to scalding risk
Solution Approach 1:
The thermostatic mixing cartridge acts as an intermediary device between the high-temperature hot water supply and the user. It automatically mixes hot water with cold water to deliver tempered water at a safe, constant temperature, thereby eliminating the scalding hazard while preserving the high-temperature storage benefits for bacterial prevention.
4Reliability
If installer error or ignorance occurs, then compliance with plumbing codes worsens, but the need for temperature control remains
Solution Approach 1:
The integrated design eliminates the possibility of installer error in omitting the mixing cartridge, as it is built into the valve assembly. The product itself ensures compliance with plumbing codes that require temperature control, removing reliance on installer knowledge or attention to detail.
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 integrated thermostatic mixing cartridge ensures a constant, safe water temperature and simplifies the installation process by eliminating the need for separate conduit routing, thereby reducing installation errors and compliance with plumbing codes.
Implementation Method 1
A thermostatic mixing cartridge blends hot water with cold water to produce tempered hot water
Data Source
AI summary
A hot water valve assembly is disclosed including a dual inlet housing having a cold water inlet and a hot water inlet, a thermostatic mixing cartridge disposed within the dual inlet housing, an inner conduit disposed adjacent to and in fluid communication with the dual inlet housing and a shell including a mixed water outlet that is connected to and in fluid communication with the inner conduit.