Concentric Fluid Valve with Independent Temperature and Volume Control
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Solution Overview
Problem
Current concentric valve assemblies for fluid control suffer from interdependent temperature and volume control mechanisms, requiring sequential adjustment of both controls each time the valve is operated, which can lead to inefficiencies and potential damage from water hammer effects.
Innovation Solution
A concentric cartridge design featuring independent rotation of volume and temperature control components, allowing simultaneous adjustment of fluid temperature and volumetric flow rate without affecting each other, utilizing a pressure balance unit, volume control plate, temperature control plate, and mixing plate with irregularly shaped openings to achieve precise temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If concentric controls are made interdependent to simplify structure, then device complexity is reduced, but ease of operation deteriorates as users must sequentially adjust temperature and flow rate
Solution Approach 1:
The valve assembly is segmented into independent concentric control mechanisms: an inner control for temperature and an outer control for flow rate. Each control operates independently through separate rotational axes, allowing users to adjust temperature and flow rate simultaneously without sequential dependency, thereby improving ease of operation while maintaining structural simplicity
2Device complexity
If sequential adjustment of temperature and flow rate is required, then device complexity is reduced, but loss of time increases as users must readjust controls multiple times
Solution Approach 1:
The control mechanism is divided into independent concentric segments where the inner temperature control and outer flow rate control can be adjusted simultaneously. This segmentation eliminates the need for sequential adjustment, reducing the time users spend readjusting controls while keeping the overall mechanism relatively simple
3Ease of operation
If concentric controls are made independent, then ease of operation is improved allowing simultaneous adjustment, but device complexity increases with additional rotational mechanisms
Solution Approach 1:
The valve assembly employs a nested concentric configuration where the inner temperature control mechanism is positioned within the outer flow rate control mechanism. Both controls rotate about shared concentric axes, allowing independent operation while utilizing the same central space, thus improving ease of operation without proportionally increasing device complexity
4Device complexity
If interdependent controls are used, then device complexity is reduced, but reliability deteriorates due to potential water hammer effects from improper mixing
Solution Approach 1:
The control system is segmented into independent temperature and flow rate controls that operate simultaneously. This independence ensures proper balancing of hot and cold water flows, preventing pressure imbalances that could cause water hammer effects, thereby improving reliability while maintaining relatively simple device structure
Solution Approach 2:
The pressure balance unit incorporates a feedback mechanism that responds to pressure differential changes between hot and cold water supplies. When pressure imbalance occurs, the feedback system automatically adjusts the mixing ratio to maintain equilibrium, preventing water hammer effects and improving system reliability
Data Source
AI summary
A concentric cartridge for fluid mixing valve includes an inlet adapter configured to receive a first fluid and a second fluid, a pressure balance unit, a volume control plate rotatably coupled to the pressure balance unit and positioned between the inlet adapter and the pressure balance unit, a temperature control plate, and a mixing plate positioned between the pressure balance unit and the temperature control plate. The pressure balance unit and the volume control plate are rotatable relative to the inlet adapter and the temperature control plate is rotatable relative to the mixing plate. The mixing plate has an irregularly shaped opening configured to mix fluids with different temperatures such that the temperature of the mixed fluid increases linearly as a function of angular rotation of a temperature control handle.