Dual-Oven Heating Control on a 120 V Power Supply
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Solution Overview
Problem
Existing cooking appliances require a 240 volt power supply for simultaneous heating of oven cavities and drawers, necessitating costly rewiring of kitchens with 120 volt systems, discouraging consumers from upgrading to electric ovens.
Innovation Solution
A control system with temperature sensors and a controller that alternately energizes heating elements in the oven cavities, allowing energy to be supplied to only one heating element at a time, using a standard 120 volt household power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a 240 volt power supply is used to simultaneously heat both oven cavity and drawer, then heating performance is improved, but installation complexity and cost increase due to required rewiring
Solution Approach 1:
The control system alternates between heating the oven cavity and the drawer in periodic cycles. The controller monitors temperatures in both cavities and sequentially activates heating elements, ensuring both spaces receive adequate heating over time without requiring simultaneous high-power supply.
Solution Approach 2:
The system dynamically adjusts heating allocation based on real-time temperature conditions. When the oven cavity requires more heating, the drawer heating is reduced or paused, and vice versa. This dynamic switching allows the system to adapt to varying thermal demands while operating within 120 volt constraints.
2Productivity
If simultaneous heating of oven cavity and drawer is implemented, then heating efficiency is improved, but energy consumption increases
Solution Approach 1:
The system uses periodic heating cycles where the controller alternates activation between the oven cavity heater and drawer heater. Temperature sensors monitor both cavities and trigger heating sequences that provide adequate warmth to both spaces over time while avoiding the continuous high energy draw of simultaneous operation.
Solution Approach 2:
The control system maintains continuous useful heating action by intelligently switching between cavities. Rather than allowing either space to cool down completely, the controller ensures that heating is continuously applied to whichever cavity needs it most, maintaining overall thermal productivity while managing energy consumption.
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 efficient heating of both oven cavities and drawers using a single 120 volt power supply, reducing installation costs and making electric oven upgrades more feasible without rewiring.
Implementation Method 1
A plurality of known heating elements may be utilized to respectively heat the oven cavity and the drawer
Implementation Method 2
A first temperature sensor configured to detect a temperature within the first oven cavity, a second temperature sensor configured to detect a temperature within the second oven cavity
Data Source
AI summary
A control system for an oven includes a first and a second temperature sensor, and a controller. The oven has a first cavity and a second cavity and includes, a first electrical heating element positioned within the first oven cavity, and a second electrical heating element positioned within the second oven cavity. The first temperature sensor is configured to detect a temperature within the first oven cavity, and the second temperature sensor is configured to detect a temperature within the second oven cavity. The controller is operatively coupled to the temperature sensors and the heating elements. The controller is configured to receive signals from the sensors and energize both the first and second heating elements by allowing energy to be supplied to only one of the first and second heating elements at a given time.