Vehicle Heater Heat Exchanger Housing for Easier Sealed Assembly
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Solution Overview
Problem
Existing heat exchanger arrangements for vehicle heaters are complex to manufacture due to intricate structures and require precise alignment of housing parts, which complicates the integration of heat transfer medium and exhaust gas flow connections.
Innovation Solution
A pot-shaped heat exchanger housing design with heat transfer medium flow connections on the outer peripheral wall and an exhaust gas flow connection on the inner peripheral wall, allowing for easy assembly and manufacturing, with the heat transfer medium flow space delimited radially outward by the outer peripheral wall, simplifying the production process and avoiding undercut areas on the inner housing part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heat exchanger housing uses a complex structure with multiple housing parts and undercut areas to enable heat transfer medium flow connections, then the heat transfer efficiency and fluid-tight seals are improved, but the manufacturing complexity and production costs increase
Solution Approach 1:
The heat exchanger housing is divided into an outer housing part and an inner housing part that can be separately manufactured and then assembled. The outer housing part contains the heat transfer medium flow connections, while the inner housing part contains the exhaust gas flow connection. This segmentation allows each part to be optimized for its specific function and manufactured using appropriate processes, reducing overall manufacturing complexity while maintaining reliability.
Solution Approach 2:
The inner housing part is nested within the outer housing part, with the inner housing part inserted into the outer housing part to form the complete heat exchanger housing. This nested configuration allows the heat transfer medium flow space to be defined between the two housing parts, enabling fluid-tight seals while simplifying the manufacturing process by avoiding undercut areas on the inner housing part.
2Reliability
If the heat exchanger housing uses a complex structure with precise alignment requirements for housing parts, then the heat transfer efficiency is improved, but the ease of manufacture decreases
Solution Approach 1:
The outer housing part is pre-formed with the heat transfer medium flow connections integrated into its structure, and the inner housing part is pre-formed with the exhaust gas flow connection. This preliminary action eliminates the need for complex post-assembly operations and precise alignment procedures, as the connections are already in their correct positions before assembly. The housing parts are designed to self-align during assembly, further simplifying the manufacturing process.
3Duration of action of stationary object
If the inner housing part is made from durable materials like aluminum to withstand high temperatures, then the thermal durability is improved, but the weight and cost increase
Solution Approach 1:
Different parts of the heat exchanger housing are made from different materials optimized for their specific requirements. The inner housing part, which is exposed to high temperatures from exhaust gases, is made from durable materials like aluminum to withstand thermal stress. The outer housing part, which is not exposed to high temperatures, can be made from lighter and more cost-effective plastics. This local quality differentiation optimizes the overall weight and cost while maintaining thermal durability where needed.
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 simplifies the manufacturing process, reduces production costs, and allows for easy integration with other vehicle components, while maintaining efficient heat transfer and fluid-tight seals, with the inner housing part exposed to high temperatures and made from durable materials like aluminum, and the outer part made from lighter, cost-effective plastics.
Implementation Method 1
the inner heat exchanger housing can absorb heat from the combustion exhaust gases and transfer it to the heat transfer medium flowing in the heat transfer medium flow space
Data Source
Figure 1
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Figure 4
AI summary
A heat exchanger arrangement, in particular for a vehicle heater, comprising a pot-like heat exchanger housing (12) extending in the direction of a housing longitudinal axis (L) and having an outer wall (18, 20) and an inner wall (22, 24), wherein between the outer wall (18, 20) and the inner wall (22, 24) forms a heat transfer medium flow space, with at least one heat transfer medium flow connection piece (50, 52) open to the heat transfer medium flow space being provided on the outer wall (18, 20) and with the heat transfer medium housing (12) having one to one of the inner wall (22, 24) surrounding the interior (26) of the heat exchanger housing (12) open exhaust gas flow connection (30), wherein the heat exchanger housing (12) has an outer housing part (14) with an outer peripheral wall (18) and an outer bottom wall (20) and an inner Housing part (16) with an inner peripheral wall (22) and an inner bottom wall (24), is characterized in that at least one heat transfer medium flow connector (50, 52) is provided on an axial end region (44) of the outer peripheral wall (18) of the outer housing part (14) remote from the outer bottom wall.