Heat exchanger component
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Solution Overview
Problem
Fuel-operated vehicle heaters face challenges in reducing pollutant content, particularly nitrogen oxides, in exhaust gases due to stringent emission standards, and existing heat exchanger designs are not structurally simple or compact enough to efficiently address this issue.
Innovation Solution
A heat exchanger assembly with an integrated exhaust gas treatment unit, where the exhaust gas treatment chamber is positioned adjacent to the heat transfer medium flow space, allowing for efficient use of heat for treatment, and featuring a radially routed exhaust gas duct and a nitrogen oxide catalytic converter for pollutant reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an exhaust gas treatment unit is added to reduce pollutant content, then the pollutant reduction capability is improved, but the device complexity increases
Solution Approach 1:
The exhaust gas treatment chamber is integrated into the outer heat exchanger housing, merging the exhaust gas treatment function with the heat exchanger structure. This combination allows the catalytic converter to be housed within the existing structural framework, adding pollutant reduction capability without proportionally increasing overall device complexity
Solution Approach 2:
The outer heat exchanger housing serves dual purposes: it contains the heat transfer medium flow space for thermal exchange and simultaneously houses the exhaust gas treatment chamber for pollutant reduction. This multi-functionality allows a single structural component to fulfill multiple system functions, reducing the need for separate dedicated structures
2Use of energy by moving object
If the exhaust gas treatment chamber is positioned adjacent to the heat transfer medium flow space, then heat efficiency for treatment is improved, but the structural complexity increases
Solution Approach 1:
The exhaust gas treatment chamber and heat transfer medium flow space are positioned adjacent to each other within the same outer housing structure, merging thermal management and exhaust treatment functions in close proximity. This spatial arrangement enables direct heat transfer from the heat transfer medium to the exhaust gas treatment chamber, improving thermal efficiency without requiring separate distant systems
Solution Approach 2:
The outer heat exchanger housing is designed with differentiated local zones: one region contains the heat transfer medium flow space optimized for thermal exchange, while an adjacent region houses the exhaust gas treatment chamber. This local differentiation allows each zone to be optimized for its specific function while maintaining close spatial relationship for efficient heat transfer
3Volume of moving object
If a compact design is implemented, then the space utilization is improved, but the manufacturing complexity increases
Solution Approach 1:
The heat exchanger assembly is divided into distinct functional modules: the inner heat exchanger housing containing the exhaust gas flow space, and the outer heat exchanger housing containing the heat transfer medium flow space and exhaust gas treatment chamber. This segmentation allows each module to be manufactured and assembled separately, simplifying production while achieving compact overall integration
Solution Approach 2:
The inner heat exchanger housing is positioned within the outer heat exchanger housing, creating a nested configuration where the inner housing contains exhaust gas flow passages and the outer housing contains both heat transfer medium flow space and the exhaust gas treatment chamber. This nesting arrangement maximizes space utilization by placing components in concentric layers, reducing overall assembly volume while maintaining manufacturability of individual 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
The compact design with integrated exhaust gas treatment enables efficient pollutant reduction, minimizing heat loss and utilizing heat from the heat transfer medium for catalytic reactions, thus effectively lowering nitrogen oxide content in exhaust gases.
Implementation Method 1
at least one exhaust gas treatment unit through which exhaust gas can flow is arranged in the exhaust gas treatment chamber
Implementation Method 2
utilizing heat from the heat transfer medium for catalytic reactions
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A heat exchanger assembly for a fuel-operated vehicle heater comprises an inner heat exchanger housing (10) with an inner circumferential wall (16) surrounding a housing axis (A) and an inner bottom wall (18), wherein the inner heat exchanger housing (10) defines an exhaust gas flow space (58), and an outer heat exchanger housing (12) with an outer circumferential wall (22) and an outer bottom wall (24), wherein the outer heat exchanger housing (12) and the inner heat exchanger housing (10) define a heat transfer medium flow space (28), wherein an exhaust gas treatment space (36) is provided on the outer heat exchanger housing (12), and wherein at least one exhaust gas treatment unit (50) through which exhaust gas flows is arranged in the exhaust gas treatment space (36).