Microwave Oven Ventilation Layout for Steam Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Microwave ovens experience steam condensation on cavity walls due to ventilation dead zones, affecting both food visibility and electrical safety.
Innovation Solution
The ventilation system in the oven features air inlet and outlet means arranged closely on the upper wall, extending across the width of the oven, creating an air curtain that isolates steam from walls and ensures complete cavity ventilation with an air flow speed of 0.5-4 m/s, preventing condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air inlet and outlet means are arranged in opposite walls of the cavity, then ventilation coverage is improved, but ventilation dead zones are created favoring condensation
Solution Approach 1:
Instead of arranging air inlet and outlet means in opposite walls as conventionally done, the invention inverts this arrangement by positioning both means in the same portion of the upper wall, close to each other. This inverted configuration creates an air curtain that flows downward along the cavity walls, effectively preventing condensation by isolating the walls from steam sources.
Solution Approach 2:
The invention introduces an air curtain as an intermediary barrier between the steam source (heated food) and the cavity walls. This air curtain, generated by the closely positioned inlet and outlet means in the upper wall, acts as a protective layer that prevents steam from contacting and condensing on the walls.
2Reliability
If air inlet and outlet means are positioned close together, then complete ventilation without dead zones is achieved, but air flow speed must be precisely controlled
Solution Approach 1:
The invention specifies precise parameter ranges for air flow speed (0.5-4 m/s, preferably 1 m/s) to optimize the ventilation performance. By controlling the air flow speed within this range, the system achieves complete cavity ventilation while preventing the air flow from looping directly between inlet and outlet means, thus avoiding dead zones without requiring overly complex control mechanisms.
3Object-affected harmful factors
If ventilation system creates high air flow speed, then steam isolation efficiency is improved, but energy consumption increases
Solution Approach 1:
The invention defines an optimized air flow speed range (0.5-4 m/s, preferably 1 m/s) that balances steam isolation efficiency with energy consumption. This parameter optimization ensures sufficient air flow velocity to create an effective air curtain and prevent steam contact with walls, while avoiding excessively high speeds that would lead to unnecessary energy waste.
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 eliminates ventilation dead zones, ensuring complete steam isolation and preventing condensation on walls, enhancing both aesthetic and safety aspects by maintaining clear visibility and protecting electrical components.
Implementation Method 1
the ventilation system being adapted to create an air flow having a speed at the level of the air inlet means in the cavity of between 0.5 and 4 m/s
Implementation Method 2
This air circulation makes it possible to create an air curtain between the walls of the cavity and the heated food, a source of steam
Implementation Method 3
To overcome this problem, it is known to ventilate the cavity to evacuate the steam and evaporate the condensation formed
Data Source
Figure 1~2
AI summary
The oven has a cavity (10) to receive a food to be heated, and a ventilation system with a double ventilator, where the cavity includes air intake and air outlet units (13, 14) that are disposed in the upper wall of the cavity. The two units extend in the same portion of the wall such that they are positioned in proximity to each other, where the portion includes a lower surface that is one third of a total surface of the wall. The two units are separated at a specified distance, where the air intake units are adjacent to a front door (11) of the oven.