Gas Mixer Segmentation for Combustion Efficiency
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Solution Overview
Problem
Fully premixed gas burners face challenges in evenly mixing airflow and gas due to the limited length of the mixing pipe, which hinders combustion efficiency and makes it difficult to control the mixing effect.
Innovation Solution
A gas mixer design featuring a base with an inlet portion, mixing portion, and outlet pipes, where the air path and gas inlets communicate through a mixing chamber, utilizing a flow splitter and partitions to ensure even mixing by guiding airflow and gas flow, reducing turbulence, and optimizing pressure distribution for efficient combustion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mixing pipe is used to mix air and gas in a fully premixed gas burner, then combustion efficiency is improved, but the mixing effect is difficult to control and the mixing is not even due to the short length of the mixing pipe
Solution Approach 1:
The mixing process is divided into multiple stages: primary mixing in the mixing chamber, secondary mixing in the diffusion section, and final mixing at the burner outlet. This segmentation allows each stage to contribute to the overall mixing quality, ensuring uniform distribution of gas and air while maintaining controllable mixing effects at each stage.
Solution Approach 2:
The invention introduces a diffusion section that extends the mixing path from a simple linear pipe to a multi-dimensional structure with expanded cross-sectional area. This dimensional change allows the gas and air flows to interact more thoroughly, improving mixing uniformity while maintaining a compact overall structure.
2Manufacturing precision
If the mixing pipe length is increased to improve mixing uniformity, then the mixing effect improves, but the device complexity and space requirements increase
Solution Approach 1:
The outlet pipe is nested within the mixing chamber structure, with the outlet pipe's inlet positioned at the closed end of the mixing chamber. This nested arrangement allows the outlet pipe to serve dual functions as both a structural component and a mixing element, improving mixing uniformity without increasing overall device complexity.
Solution Approach 2:
The diffusion section expands the mixing chamber in the radial direction rather than extending the linear length. This dimensional change achieves improved mixing uniformity by increasing the interaction area between gas and air flows without proportionally increasing the overall device length or complexity.
3Ease of operation
If a blower is used to draw air into the burner for premixing, then the mixing process is controlled, but the system complexity increases compared to atmospheric burners
Solution Approach 1:
The outlet pipe is designed to extend into the mixing chamber, creating a self-induced flow pattern where the gas flow from the outlet pipe automatically draws air into the mixing chamber without requiring an external blower. This self-service mechanism achieves controlled mixing while maintaining system simplicity.
Solution Approach 2:
The invention utilizes pneumatic principles where the gas flow from the outlet pipe creates a pressure differential that naturally draws air into the mixing chamber. This pneumatic self-induction mechanism provides controlled mixing without the need for mechanical blowers, reducing system complexity while maintaining ease of operation.
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 gas mixer achieves more even mixing of air and gas, enhancing combustion efficiency and shortening the reaction time for adjusting flame height, thereby improving the overall performance of the burner.
Implementation Method 1
When gas is outputted from the nozzle, a low pressure is created around the nozzle, drawing primary air into the burner to be mixed with gas
Implementation Method 2
utilizing a flow splitter and partitions to ensure even mixing by guiding airflow and gas flow, reducing turbulence, and optimizing pressure distribution
Data Source
AI summary
A gas mixer includes at least one outlet pipe and a base having an inlet portion and a mixing portion. The inlet portion has an air inlet, at least one gas inlet, and an air path. The air path communicates with the air inlet and the at least one gas inlet, and has an exit. The mixing portion has a mixing chamber communicating with the exit. The outlet pipe is engaged with the mixing portion of the base, and extends into the mixing chamber. The exit of the air path corresponds to a body of the outlet pipe. Therefore, air and gas can be effectively premixed and outputted to a burner, whereby to accurately control the air-fuel ratio to enhance the combustion efficiency of the burner.