Cooktop appliance and temperature switch
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Solution Overview
Problem
Conventional cooktop appliances lack accurate and timely detection of temperature conditions near the heat source, leading to undesirable temperature swings that can result in overcooking or undercooking of food.
Innovation Solution
A cooktop appliance with an electric heating element, an infinite switch, and a temperature switch that alternates between two separate duty cycle paths based on detected temperature, allowing for precise control of heat output to prevent excessive or deficient temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional temperature sensors are used to estimate temperature at the cooking utensil, then the system can provide basic temperature monitoring, but the system is unable to quickly evaluate live conditions near the burner and provides inaccurate temperature detection
Solution Approach 1:
The patent introduces a thermal communication medium (such as a metal bar or conductive structure) that acts as an intermediary between the heating element and the temperature switch. This intermediary rapidly conducts thermal energy from the heating element to the temperature sensor, enabling quick and accurate temperature detection without requiring direct contact between the sensor and the heating element, thus resolving both the accuracy and response time issues
Solution Approach 2:
The patent replaces conventional slow-responding temperature sensors with a bimetallic temperature switch that utilizes thermal expansion and contraction of bimetallic strips. This mechanical system responds much faster to temperature changes and provides more accurate live temperature evaluation near the burner, eliminating the delays and inaccuracies of electronic temperature sensors
2Ease of operation
If the control mechanism cycles the heating source between on and off states to regulate heat output, then the average heat output can be controlled, but undesirable temperature swings occur before detection
Solution Approach 1:
The patent implements a feedback mechanism where the bimetallic temperature switch continuously monitors the actual temperature near the heating element and automatically adjusts the heating cycle accordingly. When the temperature reaches the desired level, the bimetallic strip actuates to turn off the heating element, and when the temperature drops, it resets to turn it back on. This closed-loop feedback system eliminates temperature swings by responding immediately to temperature changes, maintaining stable temperature control
3Reliability
If conventional safety features are used to estimate temperature, then basic safety monitoring is provided, but the system cannot prevent overheating or underheating conditions
Solution Approach 1:
The patent employs a bimetallic temperature switch that is pre-calibrated to activate at specific temperature thresholds. Before dangerous overheating or underheating conditions can develop, the bimetallic strip automatically actuates to adjust or terminate the heating cycle. This preliminary action prevents harmful temperature extremes from occurring, enhancing safety beyond what conventional estimation systems can provide
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
The solution enables accurate and responsive temperature control, reducing temperature swings and preventing overheating or underheating, thus ensuring safer and more consistent cooking results.
Implementation Method 1
a bimetallic temperature switch may include a pole terminal alternately connected to a first throw terminal and a second throw terminal according to a temperature at the bimetallic temperature switch
Implementation Method 2
an electric heating element, an infinite switch, and a temperature switch that alternates between two separate duty cycle paths based on detected temperature
Data Source
AI summary
A cooktop appliance having a temperature switch is generally provided herein. The cooktop appliance may include a panel, an electric heating element, an infinite switch, and the temperature switch. The electric heating element may be positioned at the panel and include a first terminal and a second terminal. The infinite switch may be electrically coupled to the electric heating element to control power thereto. The infinite switch may include a primary voltage path and an auxiliary voltage path independent from the primary voltage path. The temperature switch disposed in thermal communication with the electric heating element, the temperature switch being in alternate communication with the primary voltage path below a predetermined threshold temperature and with the auxiliary voltage path at or above the predetermined threshold temperature.