Control circuit for an electromagnetic valve, gas burning system, method for monitoring a switching state of an electromagnetic valve and method for operating a gas burning system
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Solution Overview
Problem
Existing control circuits for electromagnetic valves require additional sensors to monitor switching states, making them more complex and costly to produce and maintain.
Innovation Solution
A control circuit that includes a current source, a measuring device to monitor voltage and current levels through the magnetic coil, and a monitoring unit to infer the switching state of the valve without additional sensors, using electromotive force and back-EMF for movement detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional sensors are used to monitor the switching state of the electromagnetic valve, then the reliability of switching state detection is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The control circuit uses its own existing measuring device to monitor the magnetic coil's electrical characteristics, allowing the system to self-diagnose the switching state without requiring external sensors. The control circuit serves both its original function and the monitoring function simultaneously.
Solution Approach 2:
The patent uses the electrical characteristics (voltage, current) of the magnetic coil as an intermediary parameter to indirectly determine the switching state of the electromagnetic valve. Instead of directly sensing the valve position, the system measures the electrical properties that change with the valve state.
2Measurement precision
If additional sensors are installed to detect valve element position, then the measurement precision of switching state is improved, but the manufacturing cost and production complexity increase
Solution Approach 1:
The patent extracts the monitoring function from the mechanical/physical domain (valve position sensing) and transfers it to the electrical domain (coil characteristic measurement). This extraction eliminates the need for additional mechanical sensors and simplifies the manufacturing process.
Solution Approach 2:
The patent replaces potential mechanical position sensing mechanisms with electrical measurement of the magnetic coil's characteristics. By substituting mechanical sensing with electrical measurement, the system achieves equivalent or superior measurement precision while simplifying manufacturing.
3Reliability
If external sensors are connected to monitor fluid throughflow, then the reliability of valve state monitoring is improved, but the device complexity and maintenance requirements increase
Solution Approach 1:
The patent merges the monitoring function with the existing control circuit by integrating the measurement and evaluation of magnetic coil characteristics into the same device. This consolidation reduces the number of separate components, simplifying both installation and maintenance while maintaining reliable monitoring.
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
Enables cost-effective and efficient monitoring of electromagnetic valve states, reducing production complexity and improving fault detection without additional components, applicable in gas burning systems.
Implementation Method 1
the magnetic coil, when excited, conveys the movable element in one direction in order to move the valve element from its initial position into its active position
Implementation Method 2
secondly experiences a current induction in the case of a movement of the movable element as a result of an electromotive return force (back-EMF)
Implementation Method 3
a measuring device for measuring a voltage level of the magnetic coil and/or a current level through the magnetic coil
Data Source
AI summary
An electromagnetic valve has a magnetic coil and a movable element coupled to a valve element. The magnetic coil, when excited, conveys the movable element in one direction to move the valve element from its initial position into its active position. A control circuit for the electromagnetic valve has a current source for optionally supplying current to the magnetic coil and a measuring device for measuring a voltage level of the magnetic coil and/or a current level through the magnetic coil. A monitoring unit which is connected to the measuring device establishes a switching state of the electromagnetic valve corresponding to the position of its valve element based on the intended current supply state of the current source and the current and/or voltage characteristic measured by the measuring device and, if appropriate, determines a fault state of the current supply and/or the electromagnetic valve.