Automatic Balance Valve Control for Hydronic Emitter Flow Regulation
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Solution Overview
Problem
Regulating water flow through hydronic emitters in environmental temperature control systems is tedious and time-consuming due to variations in pipe distances and sizes, requiring manual adjustments of mechanical valves to achieve balance.
Innovation Solution
An automatic self-adjusting balance valve controller with a microprocessor, temperature sensors, and a motorized mechanism that adjusts the water flow valve based on temperature differentials between inlet and outlet, using either radio frequency or wired communication for settings and powered by AC, DC, or battery, with internal energy storage to maintain stable temperature differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual mechanical valves are used to regulate water flow, then flow regulation capability is achieved, but the balancing process becomes tedious and time-consuming
Solution Approach 1:
The balance valve automatically regulates water flow by measuring its own inlet and outlet temperatures and adjusting its position accordingly. The microprocessor controller reads temperature sensor data, calculates the temperature differential, and actuates the motor to adjust the valve position to maintain the desired temperature difference, enabling the valve to self-regulate without manual intervention
Solution Approach 2:
The system uses temperature sensors to continuously monitor inlet and outlet temperatures, feeds this information back to the microprocessor controller, which then adjusts the valve position based on the calculated temperature differential. This closed-loop feedback mechanism ensures automatic maintenance of balanced flow conditions
2Reliability
If multiple iterations of manual adjustment are performed, then balanced flow is achieved, but the complexity of the balancing process increases
Solution Approach 1:
The valve performs its own balancing function by automatically measuring temperature differentials and adjusting its position. The microprocessor controller executes the balancing algorithm, reads sensor data, calculates required adjustments, and actuates the motor accordingly, eliminating the need for external technicians to perform iterative manual adjustments
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated electromechanical system. The motorized actuator substitutes for manual valve operation, and the microprocessor-based control system replaces the iterative manual measurement and adjustment process with automatic temperature-differential-based control
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
Automatically stabilizes water flow to maintain desired temperature differentials, reducing the time and effort required to balance the system by continuously adjusting the valve position based on real-time temperature measurements, ensuring balanced operation of hydronic emitters.
Implementation Method 1
a microprocessor with memory and two analog-to-digital inputs measuring the temperature of emitter inlet and outlet temperatures
Implementation Method 2
a motorized mechanism that can move a shaft to adjust the water flow valve pin length
Implementation Method 3
the measured temperature differential is used to adjust the shaft length to maintain a stable temperature difference between the inlet and outlet to the valve
Data Source
AI summary
A self-adjusting balance valve controller controls water flow through a hydronic emitter in a heating and/or cooling temperature control system. The valve controller obtains a measured temperature differential between an inlet and an outlet of the hydronic emitter and determines a displacement of a coupling pin from the measured temperature differential. The valve controller then instructs a driving mechanism to move, through a coupling mechanism, the coupling pin to adjust a valve that results in a desired water flow through the hydronic emitter. The valve controller may maintain a stable temperature differential at a desired differential value, which may be obtained through a user interface or from a memory device. Moreover, the desired differential value may vary with different times of operation or temperature control situations.