Steam Cooker Timing Control for Chamber Steam Retention

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Solution Overview

Problem

Steam supplied into the cooking chamber of steam cookers often leaks out, leading to inefficient cooking and potential damage to the cooker components.

Innovation Solution

A method for controlling a cooker that generates radiant heat and convection heat, with a steam generator operating independently of the heating source, ensuring steam is supplied effectively and safely into the cooking chamber by preset timing controls.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the steam generator operates independently with preset timing control, then steam is supplied effectively into the cooking chamber, but the control system complexity increases

Engineering Contradiction:
Improvecooking efficiencyVSAvoidcontrol system complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The steam generator operates independently with preset timing control, generating and supplying steam into the cooking chamber before the heating source starts heating. This preliminary action ensures that steam is already present in the cooking chamber when heating begins, improving cooking efficiency and food quality without requiring complex real-time coordination between steam generation and heating operations

Inventive Principle:
Principle #10Preliminary action

2Productivity

If steam is supplied into the cooking chamber, then cooking effectiveness is improved, but steam leaks out causing energy loss

Engineering Contradiction:
Improvecooking effectivenessVSAvoidsteam energy loss
Core Design Contradiction:
ProductivityVSLoss of energy

Solution Approach 1:

The patent acknowledges that steam may leak out of the cooking chamber but converts this potential harm into a benefit by continuously generating steam independently of the heating cycle. The independent preset timing control ensures that steam is replenished at optimal moments, transforming the energy loss from leaking steam into an opportunity to maintain steam presence in the chamber more effectively

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

3Loss of time

If the steam generator starts before the heating source, then steam is established in the chamber earlier, but the operational timing control becomes more complex

Engineering Contradiction:
Improvesteam establishment timeVSAvoidtiming control complexity
Core Design Contradiction:
Loss of timeVSDevice complexity

Solution Approach 1:

The steam generator is configured to start at preset time points before the heating source begins operation. This preliminary action establishes steam in the cooking chamber earlier, reducing the time needed for steam cooking to become effective. The preset timing control simplifies the coordination by using predetermined schedules rather than complex real-time adjustments

Inventive Principle:
Principle #10Preliminary 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 method enhances food cooking efficiency and safety by maintaining steam within the chamber, reducing energy transfer leaks and improving operational reliability.

Implementation Method 1

generating radiant heat and convection heat supplied into a cooking chamber by a heating source

Methodology Applied
Scientific EffectRadiant heat: Thermal Radiation

Implementation Method 2

generating radiant heat and convection heat supplied into a cooking chamber by a heating source

Methodology Applied
Scientific EffectConvection heat: Convection

Implementation Method 3

operating a steam generator to generate steam supplied into the cooking chamber

Methodology Applied
Scientific EffectSteam generation: Evaporation

Data Source

PatentEP2417884B1Cooking appliance control method
Publication Date: 2015.03.25 LG ELECTRONICS INC
  • EP2417884B1 patent drawingFigure 1
  • EP2417884B1 patent drawingFigure 2
  • EP2417884B1 patent drawingFigure 3

AI summary

A method for controlling a cooker is provided. The method for controlling the cooker includes generating radiant heat and convection heat supplied into a cooking chamber by a heating source and operating a steam generator to generate steam supplied into the cooking chamber. When a signal for starting an operation of the steam generator is input before an operation of the heating source starts, the operation of the steam generator starts at a preset time point regardless of a time point at which the operation of the heating source starts. Also, when a signal for starting an operation of the steam generator is input after an operation of the heating source starts, the operation of the steam generator starts at a time point at which the signal is input. Thus, the food may be effectively and safely cooked using the steam.