Segmented Airflow Cooling for Heating Cooker Inverter Boards
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Solution Overview
Problem
Existing heating cookers, such as the one described in JP 2000-346371 A, do not effectively cool specific portions of the inverter circuit board, leading to inefficient heat management.
Innovation Solution
The proposed heating cooker includes a heating cooking compartment, a housing, a circuit board, an air blower, and a division partition. The air blower has a first blow-out port with a first blast fan that blows air toward the circuit board, and the division partition divides the air flow channel to enhance cooling performance, particularly for the inverter circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a uniform cooling system is used for the inverter circuit board, then both surfaces can be cooled, but specific high-heat portions cannot be effectively cooled
Solution Approach 1:
The patent applies local quality by creating different flow channel structures (first, second, and third flow channels) that direct air flow to specific high-heat generation portions of the inverter circuit board. The division partition creates localized cooling zones with different air flow characteristics, allowing targeted cooling of specific components rather than uniform cooling across the entire board.
Solution Approach 2:
The cooling system is segmented into multiple independent flow channels (first, second, and third flow channels) that can be controlled separately. The division partition divides the cooling space into distinct regions, enabling independent optimization of air flow to different areas of the circuit board based on their specific heat generation characteristics.
2Temperature
If air flow is restricted in the board case, then cooling efficiency is improved, but air flow quantity is reduced
Solution Approach 1:
The flow restricting portion is strategically positioned to restrict air flow only in specific regions where high-heat generation occurs. This localized restriction creates higher air flow velocity and improved cooling efficiency at critical hot spots while maintaining adequate air flow quantity to other areas of the circuit board that do not require intensive cooling.
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 configuration allows for effective cooling of specific portions of the inverter circuit board, improving heat management and extending the lifespan of the circuit board.
Implementation Method 1
The air blower has a first blow-out port accommodating a first blast fan and blowing out air toward the circuit board, and the air blower forms a first blast fan air flow with air blown out from the first blow-out port
Implementation Method 2
The board case includes, on the bottom wall portion, a flow restricting portion restricting a flow quantity of air flowing in the board case
Implementation Method 3
The division partition divides a flow channel through which the first blast fan air flow flows from the first blow-out port toward the circuit board
Data Source
AI summary
A heating cooker includes a heating cooking compartment, a housing, a circuit board, an air blower, and a division partition. The division partition includes a board case configured to accommodate the circuit board. The board case includes a bottom wall portion functioning as a partition between the heating cooking compartment and the circuit board. The circuit board is disposed apart from the bottom wall portion. A first blow-out port is disposed at a position spanning between a surface on one side and a surface on another side of the circuit board. The board case includes, on the bottom wall portion, a flow restricting portion restricting a flow quantity of air flowing in the board case.