Venturi Oven Venting Layout for Fan Heat and Grease Isolation
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Solution Overview
Problem
Current dual-cavity wall oven designs face issues with fan reliability and performance due to exhaust air containing greases and moisture accumulating on fans, heat damage from exhaust air, and increased complexity and expense from multiple fans.
Innovation Solution
A Venturi-based venting system where exhaust air from both oven cavities is drawn into a common airflow channel through ducts, using a single fan to create a Venturi effect, preventing exhaust air from passing through the fans and reducing heat exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If exhaust air passes through the fans to be evacuated, then the venting system can remove exhaust air from the oven cavities, but undesirable substances such as greases and moistures accumulate on the fans, negatively affecting fan reliability and performance
Solution Approach 1:
The patent extracts the harmful exhaust air flow path from the fan system. By introducing a separate exhaust air channel that bypasses the fans entirely, the design removes the interaction between exhaust air and fans, preventing contamination while maintaining evacuation functionality through the common venting channel.
Solution Approach 2:
The venting system is segmented into distinct functional channels: a cooling air channel that passes through the fans, and an exhaust air channel that bypasses the fans. This segmentation allows each component to perform its function without exposure to harmful substances, resolving the reliability issue.
2Productivity
If exhaust air passes through the fans, then the venting system can evacuate exhaust air, but the heat from exhaust air heats up the fans beyond optimal operational temperature, leading to underperformance or failure
Solution Approach 1:
The patent extracts the hot exhaust air flow from the fan cooling air path by creating a separate exhaust channel. This prevents thermal transfer from exhaust air to fans, maintaining fans within optimal temperature ranges while preserving exhaust evacuation capability.
3Adaptability or versatility
If multiple fans are used to cool each oven unit independently, then each oven can be cooled separately, but the reliability decreases and the expense and complexity increase
Solution Approach 1:
The patent merges the cooling air channels from multiple oven cavities into a single common channel that passes through one fan. This consolidation reduces the number of fans required while maintaining independent cooling capability through separate ducts that converge into the common channel, thereby reducing complexity and cost.
Solution Approach 2:
The single fan serves multiple functions by handling cooling air from multiple oven cavities through the common channel, replacing the need for multiple dedicated fans. This multi-functional approach reduces system complexity while preserving independent cooling adaptability.
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 enhances fan reliability by avoiding contamination and heat exposure, simplifies the venting system, and reduces costs by using a single fan, improving overall performance and reducing the risk of fan failure.
Implementation Method 1
When energized, the fan generates an airflow in the common channel to create a Venturi effect in the diverging section so that exhaust air in the first and second cavities is drawn into the common channel
Data Source
AI summary
An appliance with a Venturi based venting system is disclosed. The appliance includes a housing defining an airflow channel in flow communication with outside of the appliance, the airflow channel having a common channel with a diverging section; first and second heating units disposed in the housing; a first duct through which a first cavity of the first unit is in flow communication with the common channel, the first duct having a first outlet end disposed at least partially in the diverging section; a second duct through which a second cavity of the second unit is in flow communication with the common channel, the second duct having a second outlet end disposed in the diverging section; and a fan in flow communication with the common channel.