Appliance component fault detection
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Solution Overview
Problem
As kitchen appliances become increasingly sophisticated, there is a growing need for comprehensive component performance diagnostics to effectively monitor and manage their operations.
Innovation Solution
The appliance is equipped with a smart controller and input/output (IO) circuit connected via a local data bus, along with a plurality of sensors, including current and voltage detection sensors. These sensors monitor load current and mains supply voltage to determine fault conditions, enabling real-time processing and fault detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If comprehensive component performance diagnostics are implemented in sophisticated kitchen appliances, then operational efficiency and reliability are improved, but device complexity increases
Solution Approach 1:
An IO circuit board is introduced as an intermediary component between the control board and various appliance components. This IO board consolidates multiple sensor inputs, component control signals, and diagnostic functions into a single interface layer, allowing comprehensive monitoring without proportionally increasing overall system complexity. The IO board acts as a mediator that manages the complexity of connecting numerous sensors and components to the control system.
Solution Approach 2:
The diagnostic system is segmented into modular components: control board for high-level decision making, IO circuit board for signal routing and basic monitoring, and distributed sensors for specific parameter detection. This segmentation allows each module to perform specialized functions independently, making the overall complex diagnostic system more manageable and maintainable while achieving comprehensive component monitoring.
2Measurement precision
If multiple sensors are added to monitor load current and mains supply voltage for fault detection, then fault detection capability is improved, but device complexity increases
Solution Approach 1:
The IO circuit board serves multiple functions: it routes control signals to components, collects data from various sensors including current and voltage sensors, performs basic signal conditioning, and communicates with the control board. By making the IO board multi-functional, the system reduces the need for separate dedicated circuits for each function, thereby improving fault detection capability without proportionally increasing system complexity.
Solution Approach 2:
Multiple sensing functions (current monitoring, voltage detection, component status monitoring) are merged into a unified sensor system that interfaces through the single IO circuit board. This consolidation allows comprehensive fault detection across multiple parameters while managing complexity through a centralized interface rather than distributed separate systems.
Data Source
AI summary
An appliance having a current sensor configured to monitor load current in the appliance associated with operation of one or more components for determining a fault condition thereof. The appliance comprises a smart controller configured to control operations of the appliance and the one or more components each configured to perform an operation of the appliance in response to the smart controller. An input/output (IO) circuit coupled to the smart controller via a local data bus is configured to receive commands from the smart controller and to control the one or more components in response thereto.