Cooktop Temperature Feedback Control with Dual Sensor Sensing

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Solution Overview

Problem

Existing cooktop assemblies lack suitable feedback apparatus to monitor and adjust heating operations based on variables such as vessel size and liquid content, affecting desired cooking temperatures.

Innovation Solution

A cooktop assembly with first and second temperature sensors to measure temperatures between the heating element and the top panel, and the top panel itself, respectively, with a controller to activate and regulate the heating element based on these measurements to maintain optimal cooking temperatures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If no feedback apparatus is used, then the device complexity is low, but the temperature control precision deteriorates

Engineering Contradiction:
Improvetemperature control precisionVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements feedback control by using temperature sensors to continuously monitor the cooking surface temperature and vessel bottom temperature, then using this information to automatically adjust the heating element power output. This closed-loop feedback system resolves the contradiction by improving temperature control precision through real-time monitoring and adjustment, while the complexity increase is minimized by integrating the sensors and controller into the existing cooktop architecture.

Inventive Principle:
Principle #23Feedback

2Measurement precision

If multiple temperature sensors are added, then the temperature control precision is improved, but the device complexity increases

Engineering Contradiction:
Improvetemperature measurement accuracyVSAvoidsensor system complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies local quality by placing temperature sensors at specific critical locations - one sensor between the heating element and cooking surface, and another on the vessel bottom. This targeted sensor placement provides sufficient temperature measurement accuracy for effective control without the need for extensive sensor arrays, thereby improving temperature control precision while minimizing the increase in device complexity.

Inventive Principle:
Principle #3Local quality

3Reliability

If real-time temperature monitoring is implemented, then the cooking performance consistency is improved, but the energy consumption increases

Engineering Contradiction:
Improvecooking performance consistencyVSAvoidenergy consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action by using the temperature feedback system to cycle the heating element on and off, adjusting power delivery in response to real-time temperature measurements. This allows the system to maintain consistent cooking performance by activating heating only when and where needed, rather than continuous operation, thereby improving reliability while managing energy consumption through intelligent duty cycling.

Inventive Principle:
Principle #19Periodic action

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

This solution provides improved temperature control and regulation of the heating element, ensuring consistent cooking performance by adjusting the heating operations based on real-time temperature feedback, thereby addressing the variability in cooking conditions.

Implementation Method 1

a first temperature sensor configured to measure a first temperature between the heating assembly and the top panel

Methodology Applied
Scientific EffectTemperature sensing: Thermistor

Implementation Method 2

a second temperature sensor configured to measure a second temperature of the top panel

Methodology Applied
Scientific EffectTemperature sensing: Thermistor

Implementation Method 3

a heating assembly disposed adjacent the lower surface, the heating assembly comprising a heating element

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS10006638B2Cooktop assemblies and methods for operating same
Publication Date: 2018.06.26 HAIER US APPLIANCE SOLUTIONS INC
  • US10006638B2 patent drawing
  • US10006638B2 patent drawing
  • US10006638B2 patent drawing

AI summary

Cooktop assemblies and methods for operating cooktop assemblies are provided. A cooktop assembly includes a top panel for supporting a cooking vessel, the top panel comprising an upper surface and a lower surface, and a heating assembly disposed adjacent the lower surface, the heating assembly comprising a heating element. The cooktop assembly further includes a first temperature sensor configured to measure a first temperature between the heating assembly and the top panel, and a second temperature sensor configured to measure a second temperature of the top panel.