Double Oven Control Circuit for Low-Cost Self-Cleaning Operation
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Solution Overview
Problem
The high cost of electronic range control devices for double oven cooking appliances makes it uneconomical to regulate both ovens effectively, especially in lower-end models, due to the expense of electronic components and feature sets typically found in higher-end oven models.
Innovation Solution
A control system that uses an electronic range control for the first oven and an electromechanical thermostat assembly for the second oven, with interlock circuitry under electronic range control to prevent certain modes of operation, allowing independent or dependent operation of both ovens based on pre-determined states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single electronic range control device is used to regulate both oven cavities, then temperature control capability is improved, but device cost increases due to expensive electronic components
Solution Approach 1:
The control system is divided into two independent parts: an electronic range control device for the first oven cavity and a separate electromechanical thermostat assembly for the second oven cavity. This segmentation allows each control device to be optimized independently, reducing overall system cost while maintaining temperature control capability for both cavities
Solution Approach 2:
The electronic range control device acts as an intermediary by monitoring the state of the electromechanical thermostat assembly through relay circuitry. This allows the electronic controller to coordinate operations between the two ovens and prevent conflicting modes without requiring direct control of the second oven, reducing component requirements
2Adaptability or versatility
If electronic range control devices with full feature sets are used, then operational versatility is improved, but cost effectiveness deteriorates for lower-end models
Solution Approach 1:
Different feature sets are assigned to different control devices based on their specific functions. The electronic range control device for the first oven cavity includes full operational versatility with multiple cooking modes and electronic controls, while the electromechanical thermostat assembly for the second oven cavity provides basic temperature control functionality, optimizing cost effectiveness for lower-end models
Data Source
AI summary
A control system for an appliance having at least a first oven and a second oven includes an electronic range control device for regulating a temperature of the first oven, an electromechanical thermostat assembly for regulating a temperature of the second oven, and a relay circuit assembly under control of the electronic range control device, the relay circuit assembly being configured to selectively enable operation of the first oven and the electromechanical thermostat.