Dual Venturi Air-Gas Mixing for Independent Ratio Control
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Solution Overview
Problem
Existing gas water heater systems lack a mechanism to independently control the ratio of air and gas supplied to the burner, leading to increased manufacturing costs and complexity.
Innovation Solution
A dual venturi design with a synchronous motor and damper part that separates primary and secondary passageways, allowing independent regulation of air and gas ratios, simplifying the structure and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air and gas are simply mixed and supplied to the burner without independent control mechanisms, then the structure is simple, but the ability to control air-gas ratio according to heat quantity is lost
Solution Approach 1:
The venturi is divided into a primary venturi and a secondary venturi, each with separate air inlets and passageways. The primary venturi handles primary air and gas mixing, while the secondary venturi handles secondary air and gas mixing. This segmentation allows independent control of air-gas ratios in each stage, enabling adaptability to different heat quantities while maintaining a relatively simple overall structure.
2Adaptability or versatility
If separate control mechanisms for air and gas are added, then air-gas ratio control is improved, but manufacturing cost increases
Solution Approach 1:
The control mechanism is merged into the venturi structure itself through the damper part that rotates to simultaneously control both primary and secondary air passageways. The synchronous motor and rotational shaft are integrated with the damper part, eliminating the need for separate control mechanisms for each venturi stage. This merging reduces the number of components and simplifies manufacturing while maintaining dual-stage air-gas ratio control capability.
3Adaptability or versatility
If dual venturi with separate passageways is implemented, then air-gas ratio control is enabled, but device complexity increases
Solution Approach 1:
The secondary venturi is nested within or alongside the primary venturi structure, with the secondary air passageway integrated into the overall venturi housing. The partition separates the primary and secondary air passageways within the same structural envelope, allowing dual-stage control without requiring completely separate physical assemblies. This nesting approach reduces overall device complexity while maintaining functional separation.
4Device complexity
If synchronous motor and damper part are integrated, then structure is simplified, but operational reliability must be maintained
Solution Approach 1:
The synchronous motor provides precise rotational control of the damper part, and the limit switches detect the rotational position to provide feedback for controlled operation. This feedback mechanism ensures that the damper part reaches the correct positions for primary and secondary air control, maintaining operational reliability while using an integrated structure with fewer separate components.
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
Enables easy regulation of air and gas ratios, enhancing operational reliability and reducing manufacturing costs through a simplified structure that eliminates the need for additional components.
Implementation Method 1
the driving part comprises a synchronous motor, and the rotational shaft of the driving part is the rotational shaft of the synchronous motor
Implementation Method 2
A dual venturi design with a synchronous motor and damper part that separates primary and secondary passageways, allowing independent regulation of air and gas ratios
Data Source
Figure 1~2b
Figure 3a~3c
Figure 4a~5b
AI summary
A dual venturi comprises: a tubular part having primary and secondary passageways separated by an internal partition therebetween, wherein a primary gas inlet is provided on the side wall of the primary passageway; a body part, located in the interior of the second passageway of the tubular part, for opening/closing the flow of secondary air by rotating in horizontal plane and vertical plane directions, the horizontal plane direction being the cross-sectional direction of the tubular part and the vertical plane direction being perpendicular to the horizontal plane; a damper part having a damper part-side secondary gas outlet; a driving part, connected to the side surface of the damper part by a rotational shaft, for rotationally driving the damper part in the horizontal and vertical planes; and a secondary gas inlet for introducing secondary gas into the secondary passageway of the tubular part via the damper part by means of the secondary gas inlet-side outlet, which openly connects selectively to the damper part-side secondary gas outlet on the basis of the rotational position of the damper part, and for forming the rotational shaft of the damper part along with the rotational shaft of the driving part.