Electronic Faucet Mixing Valve Independent Flow and Temperature Control
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Solution Overview
Problem
Conventional mixing valves in electronic faucets lack the ability to provide precise control over water flow and temperature independently, often requiring users to compromise between flow rate and temperature settings.
Innovation Solution
An electronic faucet system featuring a mixing valve with a rotatable valve member and an actuator controlled by a controller, allowing for separate modes of operation for flow control and temperature control, utilizing a user interface and sensors to adjust the valve position based on user input and temperature feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional mixing valve is used to control both flow rate and temperature, then the valve can deliver water, but the user cannot independently control flow rate and temperature, requiring compromise between the two parameters
Solution Approach 1:
The patent divides the single mixing valve into two separate valves: a flow control valve and a temperature control valve. This segmentation allows independent control of flow rate and temperature, resolving the contradiction by enabling each parameter to be adjusted without compromising the other. The flow control valve manages water flow rate while the temperature control valve manages the mixing ratio of hot and cold water.
Solution Approach 2:
The patent implements dynamic control modes that allow the system to switch between different operational states. The controller can operate in flow control mode, temperature control mode, or both simultaneously, providing adaptability to different user needs. This dynamic capability enhances ease of operation by allowing users to select the appropriate control mode based on their priorities.
2Measurement precision
If a single valve controls both hot and cold water mixing, then the structure remains simple, but the ability to provide precise independent control over flow and temperature is lost
Solution Approach 1:
The patent segments the water control system into distinct flow control and temperature control functions implemented by separate valves. This segmentation achieves precise independent control of flow rate and temperature by dedicating specific valve components to specific control objectives, eliminating the compromise inherent in single-valve designs.
Solution Approach 2:
The patent creates a unified control system where a single controller manages both the flow control valve and temperature control valve. This multi-functional controller integrates multiple control capabilities, providing precise control over both parameters while presenting a simplified user interface. The controller can independently adjust each valve based on user input and sensor feedback.
3Temperature
If the valve disc is rotated to change temperature ratio, then temperature control is achieved, but flow rate control is compromised
Solution Approach 1:
The patent separates temperature control and flow rate control into independent valve mechanisms. The temperature control valve adjusts the mixing ratio of hot and cold water through rotational movement, while the flow control valve independently regulates the total water flow rate. This segmentation ensures that temperature adjustment does not inadvertently change flow rate, and vice versa.
Solution Approach 2:
The patent introduces a controller as an intermediary that coordinates the operation of both valves. The controller receives user input and sensor feedback, then independently actuates the flow control valve and temperature control valve to achieve the desired flow rate and temperature settings simultaneously, preventing the compromise that occurs in direct mechanical coupling systems.
Data Source
AI summary
An electronic faucet assembly includes a mixing valve and a user interface in communication with a controller. Input to the user interface illustratively causes the controller to operate in a flow control mode or a temperature control mode. In the flow control mode the mixing valve provides flow control of water at a constant temperature, while in the temperature control mode the mixing valve provides temperature control of water at a constant flow. A memory device may be secured to a faucet component to store identification data related thereto.