Hot Surface Igniter Temperature Feedback Control for Longer Life
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Solution Overview
Problem
Conventional hot surface igniters suffer from short service life due to unadjustable temperature and voltage fluctuations, especially in demanding environments, leading to reduced operational reliability.
Innovation Solution
A temperature control system comprising a power source module, driving module, collection module, feedback module, and control module, which utilize thermoelectric signals to precisely regulate the voltage and current to maintain the igniter at a set target temperature, incorporating an H-bridge driving circuit and DC-DC conversion for efficient energy management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a constant-v power supply method is used, then the igniter can reach high temperature for ignition, but the temperature is not adjustable and service life is shortened
Solution Approach 1:
The patent transforms the constant-voltage power supply into a dynamic controllable system by introducing a control module that adjusts voltage output based on real-time temperature feedback. The power supply voltage is no longer fixed but dynamically regulated to maintain optimal operating temperature, resolving the contradiction between achieving high temperature and extending service life.
Solution Approach 2:
The patent implements a feedback control mechanism where the collection module samples thermoelectric signals from the igniter, the control module processes this information, and adjusts the voltage output accordingly. This closed-loop feedback system enables precise temperature control, preventing both overheating (which shortens life) and insufficient heating (which fails ignition).
2Productivity
If the igniter operates continuously in special fields, then ignition function is maintained, but service life is greatly shortened
Solution Approach 1:
The patent enables dynamic voltage regulation that adapts to continuous operation requirements. The control module adjusts power delivery in real-time based on temperature feedback, allowing the igniter to maintain optimal operating conditions during continuous operation in demanding environments, thereby extending service life while maintaining productivity.
Solution Approach 2:
The patent changes the operating parameters by introducing adjustable voltage control. Instead of operating at fixed voltage, the system dynamically adjusts voltage parameters based on temperature conditions, enabling continuous operation without the degradation that would otherwise occur under constant high-stress conditions.
3Adaptability or versatility
If voltage fluctuates between high and low, then the igniter adapts to voltage variations, but the heating element is greatly impacted and service life is reduced
Solution Approach 1:
The patent uses feedback control to compensate for voltage fluctuations. The collection module detects temperature changes caused by voltage variations, and the control module adjusts the power supply output to maintain stable heating conditions, protecting the heating element from the harmful effects of voltage fluctuations while maintaining adaptability.
Solution Approach 2:
The patent implements a protective control mechanism that anticipates and cushions against the harmful effects of voltage fluctuations. By continuously monitoring temperature and adjusting power output in advance, the system prevents extreme temperature spikes or drops that would otherwise damage the heating element, thereby extending service life while maintaining voltage adaptability.
4Device complexity
If output voltage is controlled by sampling without temperature measurement, then control circuit is simple, but temperature control precision is insufficient
Solution Approach 1:
The patent employs a self-service approach where the igniter itself generates the thermoelectric signal used for temperature sensing. By utilizing the inherent thermoelectric properties of the heating element, the system achieves accurate temperature measurement without requiring separate temperature sensors or complex measurement circuits, thus maintaining simplicity while improving precision.
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 precise temperature control and extended service life of the hot surface igniter by adapting to environmental fluctuations, ensuring stable operation and reducing wear on the heating element.
Implementation Method 1
a collection module for sampling a thermoelectric signal of the hot surface igniter
Implementation Method 2
a voltage is applied to the hot surface igniter by a power source, and then a heating element of the hot surface igniter operates for ignition
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Disclosed in the present invention is a temperature control system for a hot surface igniter, said system comprising: a power source module, for providing energy of the system; a driving module, for outputting a voltage to the hot surface igniter; a collection module, for sampling a thermoelectric signal of the hot surface igniter; a feedback module, for receiving the thermoelectric signal, receiving a voltage control quantity calculated according to the thermoelectric signal, and then performing feedback; and a control module, for receiving the voltage control quantity that is fed back and controlling the output of the power source module according to the voltage control quantity. The present invention can enable the hot surface igniter to receive a suitable voltage to ensure that the hot surface igniter operates at a set target temperature, thereby realizing precise control over the operating temperature of the hot surface igniter, and increasing the service life of the hot surface igniter.