Convection Oven Air Baffle Layout for Fast Temperature Sensing
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Solution Overview
Problem
Existing hot-air or circulating-air ovens face challenges in achieving rapid temperature control response while avoiding the adverse effect of direct hot air blowing onto food, which can lead to overheating.
Innovation Solution
The air baffle plate is designed with an inclined surface facing the temperature sensor, featuring an air outlet opening for the sensor and adjacent openings that direct air flows away from the sensor, creating a mixed flow that shields the food from direct hot air influence, ensuring rapid temperature regulation without affecting the cooking result.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If an air outlet opening directly faces the temperature sensor to enable rapid temperature control response, then the temperature regulation speed is improved, but the hot air directly blows onto the food causing overheating
Solution Approach 1:
The air outlet opening is divided into two separate openings: one facing the temperature sensor for rapid temperature detection and control, and another directed toward the food for heating. This segmentation allows each opening to perform its specific function without the harmful effect of direct hot air blowing onto the food from the sensor-facing opening.
Solution Approach 2:
A baffle plate is introduced as an intermediary element between the air outlet openings and the food. The baffle plate redirects the hot air flow to achieve uniform heating while preventing direct blowing onto the food, thus mediating between the need for rapid temperature control and the prevention of overheating.
2Measurement precision
If the air outlet opening is positioned to provide rapid temperature regulation, then the control precision is improved, but the cooking uniformity deteriorates due to direct hot air impact on food
Solution Approach 1:
The air outlet is segmented into distinct openings with different orientations: one for temperature sensing and another for food heating. This allows precise temperature control through the sensor-facing opening while maintaining cooking uniformity by directing heated air appropriately through the other opening, avoiding direct impact on the food.
Solution Approach 2:
Different regions of the air outlet system are assigned different functions: the area facing the temperature sensor is optimized for rapid temperature detection and control, while other areas are optimized for uniform heat distribution to the food. This local differentiation of quality ensures both precise control and uniform cooking without compromise.
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 design allows for precise temperature control with reduced turbulence, preventing direct hot air from reaching the food and maintaining a laminar flow, thus preventing overheating and ensuring a consistent cooking outcome.
Implementation Method 1
hot-air or circulating-air fan
Implementation Method 2
hot-air or circulating-air fan
Implementation Method 3
heater arranged in the cooking chamber for heating the air in the cooking chamber
Implementation Method 4
temperature sensor of a temperature controller arranged in the cooking chamber for regulating or controlling the treatment temperature
Data Source
AI summary
The oven has an air conducting plate (8) arranged between a hot air/circulating air fan (9) and a rectangular cooking chamber (1). A central air inlet opening (14) for the fan and air outlet openings (15, 18, 19) for supplying air into the chamber are provided in the plate. The opening (19) is arranged associated to the opening (18) assigned to a temperature sensor (16). The outlet opening (19) effectuates flow mixture, which subsequently gathers direct airflow to the sensor and sweeps into the chamber in a flow direction by air flow (20), where the air flow is directed directly to the sensor.