Cooking Appliance Airflow Partition for Machine Room Cooling
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Solution Overview
Problem
Cooking appliances face challenges in efficiently cooling electric components and maintaining an improved design with enhanced stiffness and air flow management to prevent heat transfer from the cooking chamber to the machine room.
Innovation Solution
The cooking appliance incorporates a blower device with a centrifugal fan that circulates external air through an intermediate flow path between the machine room and cooking chamber, utilizing a partition plate with asymmetrical opening portions to manage air flow and cool electric components, while a discharge cover with through holes and a discharge guide enhances air flow efficiency and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a partition plate with opening portions is used to separate the machine room from the cooking chamber, then heat transfer from the cooking chamber to the machine room is prevented, but air flow management becomes more complex
Solution Approach 1:
An intermediate flow path is introduced between the machine room and cooking chamber, acting as a mediator that allows controlled air flow while preventing direct heat transfer. The partition plate with strategically positioned opening portions (first and second opening portions at different distances from the fan) manages this intermediate flow path to balance thermal isolation and air circulation requirements.
Solution Approach 2:
The partition plate is segmented with multiple opening portions at different locations and sizes. The first opening portion is positioned closer to the fan with a smaller area, while the second opening portion is positioned farther from the fan with a larger area. This segmentation allows differentiated air flow control at different positions to optimize both cooling efficiency and heat prevention.
2Productivity
If multiple opening portions of different areas are used in the partition plate, then air flow balance is improved, but manufacturing precision requirements increase
Solution Approach 1:
The partition plate features asymmetrical opening portions with different areas and positions. The first opening portion has a smaller area and is positioned closer to the fan, while the second opening portion has a larger area and is positioned farther from the fan. This asymmetrical design naturally balances air flow distribution without requiring extremely precise manufacturing tolerances, as the geometric differences compensate for minor positioning variations.
3Stability of the object's composition
If the fan is positioned in a region with constant flow area, then air flow stability is improved, but the available space for component arrangement is reduced
Solution Approach 1:
The intermediate flow path is divided into different regions along the air flow direction. The fan is positioned in a first region where the flow area is substantially constant, providing stable air flow. The opening portions are distributed in both this first region and a second region where the flow area varies, allowing component arrangement flexibility while maintaining air flow stability in the fan region.
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 effectively cools electric components, balances air flow, and improves the appliance's design by preventing heat transfer and enhancing air flow efficiency, thus maintaining optimal performance and aesthetics.
Implementation Method 1
a blower device with a centrifugal fan that circulates external air through an intermediate flow path between the machine room and cooking chamber
Data Source
AI summary
A cooking appliance includes a main body forming a machine room; a cooking chamber arranged below the machine room; an intermediate flow path including a first suction port and formed between the machine room and the cooking chamber; and a fan configured to suction air into the intermediate flow path, wherein the machine room includes a second suction port through which air is suctioned, and an opening portion connected to the intermediate flow path, the opening portion includes a first opening portion and a second opening portion arranged at a farther distance from the fan than the first opening portion, and the second opening portion has an area larger than an area of the first opening portion.