Fluid Vessel Heating Control with Low-Level Sensor Protection
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Solution Overview
Problem
Existing heating control systems for fluid vessels are complex, prone to overheating, and lack visual fluid level monitoring, which can damage heating elements and fluids.
Innovation Solution
A simplified heating control system with a low fluid level sensor, indicators for fluid levels, and a control circuit that includes relays and a temperature sensor to manage heating power, preventing overheating and protecting both the fluid and heating elements, suitable for mobile applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a temperature sensor with periodic on/off duty cycle is used for heating control, then heating control is provided, but the control circuitry becomes complex and the fluid temperature varies significantly in different parts
Solution Approach 1:
The patent extracts the temperature sensing function from the control circuitry by using a floating temperature sensor that directly interacts with the fluid. This separates the sensing function (performed by the floating sensor) from the control function (performed by the simple on/off switch), thereby simplifying the overall control circuitry while maintaining effective heating control.
Solution Approach 2:
The floating temperature sensor automatically positions itself in the fluid and provides temperature feedback without requiring complex control electronics. The sensor's buoyancy-driven movement and direct fluid contact enable it to self-regulate the heating process by simply completing or breaking the electrical circuit based on temperature, eliminating the need for sophisticated control circuitry.
2Temperature
If heating is applied to fluid in a fluid vessel, then the fluid is heated, but the fluid can be overheated and damage the heating elements when fluid level is low
Solution Approach 1:
The patent implements preliminary protection by using a floating temperature sensor that anticipates overheating conditions. When the fluid level drops or the fluid approaches dangerous temperatures, the sensor rises out of the fluid or triggers the control circuitry to disconnect power before damage can occur. This preliminary action prevents overheating and protects heating elements from damage.
Solution Approach 2:
The floating temperature sensor provides continuous feedback about the fluid's temperature and level conditions. When the sensor detects unsafe conditions (low fluid level or excessive temperature), it automatically signals the control circuitry to stop heating. This feedback mechanism ensures reliable protection against overheating and heating element damage.
3Loss of information
If visual monitoring of fluid level is added to the heating control system, then fluid level can be monitored, but the device complexity increases
Solution Approach 1:
The floating temperature sensor serves multiple functions: it monitors both temperature and fluid level simultaneously. The same sensor that detects temperature also provides visual indication of fluid level through its position in the fluid. This multi-functionality eliminates the need for separate level monitoring devices, thereby reducing overall system complexity while providing comprehensive monitoring.
Solution Approach 2:
The patent employs visual indicators (such as colored lights or displays) that change state based on fluid level and temperature conditions. These visual cues provide immediate, intuitive information to the user about the fluid's status without requiring complex monitoring electronics. The visual feedback system uses simple color or light state changes to convey critical information.
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 system effectively prevents overheating, protects heating elements, and allows visual monitoring of fluid levels, providing a user-friendly and efficient heating control solution for fluid vessels in various applications.
Implementation Method 1
a temperature sensor with a periodic on/off duty cycle determined by the deviation of the sensed temperature from a predetermined set point
Implementation Method 2
The control circuitry in previous heating control systems of the type, is typically complex. In addition, the temperature in different parts of the fluid vessel varies significantly
Data Source
AI summary
A heating control system for controlling heating of a fluid contained in a fluid vessel using a fluid level sensor as a heating control element. The system includes a control circuit coupled with an electrical power system of a heating unit. The control circuit includes switching elements that are selectively activated or deactivated responsive to a low fluid level in a corresponding fluid vessel such that heating of the fluid is terminated as the level of fluid becomes less than a predetermined value.