Thermostatic Mixer Valve Control With Intermittent Gearmotor Actuation
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Solution Overview
Problem
Electronic thermoregulating mixer valves for hot and cold water suffer from mechanical wear due to constant gearmotor operation and are unable to perform thermoregulation during power interruptions or gearmotor faults, leading to reliability issues and increased electric consumption.
Innovation Solution
A mixer valve device with a gearmotor that operates only when setting temperature values or during specific operations, utilizing a thermostat to maintain temperature and perform thermoregulation, reducing mechanical wear and allowing continued operation during power interruptions, featuring a reduced electric motor and hydraulic balance to minimize friction and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gearmotor is used to control the ball shutter position for thermoregulation, then temperature control precision is improved, but mechanical wear increases and reliability decreases
Solution Approach 1:
The gearmotor operates periodically rather than continuously - it activates only when temperature adjustment is needed based on comparisons between measured temperature and setpoint, then remains stationary during stable operation. This periodic operation significantly reduces mechanical wear on the gearmotor and ball shutter mechanism while maintaining precise temperature control through targeted adjustments.
Solution Approach 2:
The system uses a thermal probe to automatically detect water temperature and a control unit to compare it with the setpoint, enabling self-regulating operation. The gearmotor only intervenes when correction is needed, allowing the system to maintain temperature stability autonomously without continuous mechanical actuation, thereby improving reliability.
2Measurement precision
If a gearmotor continuously operates to maintain temperature, then thermoregulation accuracy is improved, but electric consumption increases
Solution Approach 1:
The gearmotor executes brief periodic activation cycles rather than continuous operation. The control unit monitors temperature continuously and triggers the gearmotor only when the measured temperature deviates from the setpoint, maintaining accurate thermoregulation while minimizing energy consumption during stable operating conditions.
Solution Approach 2:
The system replaces continuous mechanical actuation with an intelligent control strategy that uses electronic sensing (thermal probe) and conditional logic to determine when mechanical intervention is necessary. This substitution of continuous mechanical operation with selective electronic control significantly reduces electric consumption while preserving thermoregulation accuracy.
3Speed
If the gearmotor is always moving to adjust the shutter, then temperature response speed is improved, but mechanical wear increases
Solution Approach 1:
The gearmotor performs rapid periodic adjustments only when temperature correction is required, as determined by the control unit comparing measured temperature with setpoint. This approach maintains fast temperature response capability while minimizing the duration and frequency of mechanical operation, thereby reducing wear on moving parts.
Solution Approach 2:
The thermal probe continuously provides feedback on water temperature to the control unit, which compares this feedback with the desired setpoint and activates the gearmotor only when correction is needed. This feedback-driven periodic operation ensures rapid temperature response when necessary while avoiding unnecessary mechanical wear during stable conditions.
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 solution reduces mechanical wear and electric consumption while ensuring reliable thermoregulation, even during power outages, through the use of a thermostat to maintain temperature and a compact design with low-power motor operation, ensuring safety and precision in mixing hot and cold fluids.
Implementation Method 1
The temperature of the mixed water is detected by a thermal probe arranged along the outlet path of the mixed water
Implementation Method 2
a thermostat (28) which expands and contracts according to the temperature
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A mixer valve device (10), in particular for mixing hot and cold water, has a movable shutter (29) that adjusts the flow of hot water and of cold water into a mixing chamber (26) so as to have in the outlet mixed hot/cold water at a given preset temperature; the device combines a gearmotor and a thermostat (28); during the step of setting the device the gearmotor moves the shutter to the position substantially corresponding to the required temperature of the mixed water; the thermostat maintains the required temperature within a preset tolerance by moving the shutter correspondingly. A mixer valve device is thus made that has reduced mechanical wear and low electric consumption and is safe and reliable.