Performing integrity checks on climate control system components
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Solution Overview
Problem
Current HVAC systems lack effective means to easily identify whether a faulty igniter or a faulty igniter relay is causing a failure in the ignition system, leading to inefficiencies and increased maintenance time.
Innovation Solution
A controller in the climate control system senses current draw and voltage levels across components during operational phases, comparing these values to predetermined levels to distinguish between specific component failures, such as a faulty igniter, relay, or humidifier, and signals the identification of the specific condition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional HVAC systems are used without advanced sensing capabilities, then the system structure remains simple, but the ability to identify component failures is insufficient
Solution Approach 1:
The controller performs integrity checks on components (igniter, relays, humidifier) during specific operational phases before failures occur. By sensing current draw and voltage levels at predetermined times and comparing them to expected values, the system proactively identifies component conditions, enabling accurate failure identification without requiring complex continuous monitoring systems.
2Ease of repair
If component failure detection capabilities are enhanced, then maintenance efficiency improves, but the difficulty of detecting and measuring component states increases
Solution Approach 1:
The controller continuously senses current draw by components and voltage levels across terminals, then compares these measurements against predetermined expected values for each operational phase. This feedback mechanism provides clear indications of component conditions (normal, open, shorted), making it easy to identify failures without requiring complex diagnostic procedures or specialized measurement equipment.
Solution Approach 2:
The system performs self-diagnosis by automatically sensing and comparing component parameters during operation. The controller identifies failures in the igniter, igniter relay, humidifier relay, and humidifier without external intervention, reducing maintenance time and enabling quick identification of problematic components through built-in sensing and comparison capabilities.
3Measurement precision
If multiple component conditions are monitored simultaneously, then diagnostic accuracy improves, but the system complexity increases
Solution Approach 1:
The diagnostic process is segmented into distinct operational phases (igniter warm-up, pre-purge, ignition, etc.), with specific integrity checks performed at each phase. Current sensing is performed during specific phases to detect igniter and igniter relay conditions, while voltage sensing is performed at other phases to detect humidifier relay and humidifier conditions. This temporal segmentation allows accurate monitoring of multiple components without requiring all sensors to operate simultaneously, reducing overall system complexity.
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 accurate differentiation between igniter and relay failures, reducing diagnostic time and improving maintenance efficiency by providing clear indications of component conditions through comparative analysis of current and voltage levels during operational phases.
Implementation Method 1
the controller senses current draw by a first component of the system and senses voltage between terminals of a second component of the system
Implementation Method 2
the controller senses current draw by a first component of the system and senses voltage between terminals of a second component of the system
Data Source
AI summary
Exemplary embodiments are disclosed of a climate control system that includes an igniter and a controller having an igniter relay. The controller senses a current level through the igniter and senses voltage between terminals of a second relay of the controller. In a given one of a plurality of operational phases of the system, the controller is configured to compare the sensed current level and sensed voltage to a current level and voltage associated with a specific condition of the igniter, igniter relay, or second relay in the given phase. Based on a result of the comparing, the controller is configured to distinguish between a failure of one of the relays and a failure of the igniter.