Oven Gas Burner Chamber Layout for Uniform Flame Distribution
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Solution Overview
Problem
Existing gas burners for ovens and grills suffer from non-homogeneous flame distribution due to pressure gradients within the distribution chamber, leading to inconsistent heat generation and flame shape, as the mixture flow encounters a closed end, causing local pressure differences and incoherent flow.
Innovation Solution
A gas burner design featuring a Venturi tube for mixing fuel gas and primary air, with a longitudinally extended main distribution chamber and at least one outer delivery chamber, connected by through openings with varying cross sections to regulate pressure and load losses, ensuring homogeneous pressure distribution and regular flame distribution along the burner.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a tubular distribution chamber with a closed end is used to distribute fuel mixture, then the chamber structure is simple and compact, but a pressure gradient is generated causing non-homogeneous flame distribution
Solution Approach 1:
The distribution chamber is divided into multiple independent chambers (first distribution chamber and second distribution chamber) separated by a partition wall. Each chamber has its own flame holes, allowing independent pressure equalization and eliminating the pressure gradient that occurs in a single closed-end chamber. This segmentation enables homogeneous flame distribution while maintaining structural simplicity.
2Length of moving object
If the mixture flow stops suddenly at the closed end of the distribution chamber, then the chamber length is maximized for compact design, but the flow becomes incoherent and pressure gradient increases
Solution Approach 1:
By dividing the distribution chamber into two segments with a partition wall, the flow path is reorganized so that mixture enters both chambers simultaneously through the Venturi tube. This prevents sudden flow termination at a closed end, maintaining flow coherence throughout the chamber while achieving compact longitudinal design.
Solution Approach 2:
The partition wall acts as an intermediary structure that redirects and balances the flow between two chambers. It prevents direct impingement of the flow against a closed end, distributing the kinetic energy uniformly and maintaining flow stability while enabling a compact chamber configuration.
3Productivity
If pressure gradient is present in the distribution chamber, then the chamber can handle high flow rates, but flame distribution becomes heterogeneous and heat generation is inconsistent
Solution Approach 1:
The distribution chamber is segmented into two independent chambers that simultaneously receive fuel mixture from the Venturi tube. This configuration allows high total flow rates to be distributed evenly across both chambers, each with its own flame holes, ensuring uniform flame distribution and consistent heat generation across the burner surface.
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
The solution achieves a homogeneous pressure distribution in the outer delivery chamber, resulting in regular and uniform flame distribution across the entire burner, addressing the issue of inconsistent heat and flame generation.
Implementation Method 1
a Venturi tube for mixing fuel gas and primary air
Implementation Method 2
a non - null pressure gradient is generated, whereby the pressure is locally greater at the closed end of the distribution chamber and is locally smaller at the outlet section of the mixing tube
Data Source
AI summary
Gas burner (1 ) for oven, or grill, of the type comprising a Venturi tube (2) for mixing fuel gas and primary air, a main distribution chamber (3), longitudinally extended in the flow forwarding direction of the mixture, and located downstream to such a Venturi tube (2), as well as at least one delivery chamber (22a, 22b) placed outside the afore said main chamber (3), and provided with flame holes (4; 4a, 4b, 4c, 4d) for the gas - primary air mixture outflow, such a main chamber (3) and such an outer chamber (22a, 22b) being reciprocally fluidically connected, for at least one longitudinal length of the same main chamber (3), by at least one through opening (16a, 16b, 17a, 17b). -Advantageously, the afore said through opening (16a, 16b, 17a, 17b) has, relative to the forwarding longitudinal direction of the mixture flow, a greater cross section in the upstream portion and smaller cross section in the downstream portion of the afore said longitudinal length of the main chamber (3).