Cooking Chamber Airflow Sensing for Empty Heating Detection
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Solution Overview
Problem
Existing cooking devices face challenges in accurately detecting the internal temperature of a heating chamber and immediately identifying the 'empty heating' state during microwave heating, which can lead to damage to the microwave generator.
Innovation Solution
A cooking device equipped with an internal temperature sensor positioned in the circulation path of the heating chamber, operated by a circulation fan, which detects temperature changes with high accuracy and responsiveness, including the ability to identify 'empty heating' by sensing rapid temperature rises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature detector is placed inside the heating chamber to detect internal temperature, then temperature detection accuracy is improved, but the device complexity increases and the detector may interfere with microwave heating
Solution Approach 1:
The patent introduces a circulation fan as an intermediary medium to transport air from the heating chamber to the temperature detector. The fan creates a circulation path that allows the detector to measure heating chamber temperature indirectly through circulated air, eliminating the need to place the detector directly inside the microwave field while maintaining measurement accuracy.
2Speed
If the circulation fan operates at high speed to improve temperature detection responsiveness, then detection speed is improved, but energy consumption increases
Solution Approach 1:
The patent implements dynamic control of the circulation fan by adjusting its rotational speed based on operational conditions. During microwave heating, the fan operates at higher speeds to ensure rapid temperature detection and empty heating detection. During non-heating periods or when temperature stability is achieved, the fan speed is reduced, optimizing energy consumption while maintaining detection responsiveness when needed.
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 precise temperature control and immediate detection of 'empty heating' states, preventing microwave generator damage and ensuring safe and efficient cooking operations.
Implementation Method 1
a circulation fan configured to suck air in the heating chamber and blow the sucked air into the heating chamber
Implementation Method 2
an internal temperature sensor disposed in a circulation path of the air, the circulation path being formed by the heating chamber internal flow path forming unit inside the heating chamber
Implementation Method 3
When microwave heating is performed in the cooking device
Data Source
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AI summary
A cooking device according to the present disclosure comprises: a heating chamber configured to accommodate an object-to-be-heated; a circulation fan configured to suck air in the heating chamber and blow the sucked air into the heating chamber; a heating chamber internal flow path forming unit disposed inside the heating chamber and configured to define the flow rate and the blowing direction of the air blown into the heating chamber by the circulation fan; and an internal temperature sensor disposed in a circulation path of the air and provided in a predetermined region distant from the heating chamber internal flow path forming unit, the circulation path being formed inside the heating chamber by the heating chamber internal flow path forming unit.