Inductive Charging Heat Exchanger With Alternating Flow Channels
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Solution Overview
Problem
Existing heat exchangers for induction charging devices in motor vehicles are not adequately efficient or compact for effective cooling, particularly in areas with high electromagnetic losses.
Innovation Solution
A heat exchanger design featuring two interconnected metallic base plates forming a flat housing with alternating channel passages of different cross-sectional areas, combined with a flow guide arrangement to promote turbulent flow and enhance heat transfer, improves cooling efficiency and mechanical rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional heat exchanger designs are used, then the structure is simple, but the heat transfer efficiency is insufficient and the device size is large
Solution Approach 1:
The heat exchanger is segmented into multiple channel passages with alternating narrow and wide sections along the flow path. This segmentation creates different flow velocities in different sections, enhancing heat transfer efficiency while maintaining a compact structure. The narrow channel passages increase flow velocity for better heat transfer, while wide passages reduce pressure loss.
Solution Approach 2:
Different sections of the channel passages are designed with different cross-sectional areas to create local variations in flow characteristics. The narrow sections provide high velocity for improved heat transfer where needed, while wide sections provide low velocity for pressure recovery. This local quality variation optimizes overall heat exchanger performance.
2Productivity
If high heat transfer efficiency is achieved through narrow channel passages, then heat transfer improves, but pressure loss increases
Solution Approach 1:
The channel passages are segmented into alternating narrow and wide sections along the flow direction. The narrow sections enhance heat transfer through high flow velocity, while the wide sections allow pressure recovery and maintain lower pressure loss. This segmented approach balances heat transfer efficiency with acceptable pressure loss.
Solution Approach 2:
The cross-sectional area parameter of the channel passages is changed along the flow path, creating alternating narrow and wide sections. This parameter variation optimizes the balance between heat transfer efficiency (achieved in narrow sections with high velocity) and pressure loss (reduced in wide sections with lower velocity).
3Volume of moving object
If the heat exchanger is made compact, then the device size is reduced, but the cooling efficiency in high loss areas decreases
Solution Approach 1:
The heat exchanger uses a planar, two-dimensional configuration with alternating narrow and wide channel passages within a compact footprint. This dimensional arrangement allows efficient heat transfer in high loss areas without increasing the overall device volume, as the alternating channel design maximizes heat transfer surface area within the available planar space.
Solution Approach 2:
The channel passages are designed with different cross-sectional areas at different locations to optimize cooling in specific high heat loss areas. The narrow sections are positioned where enhanced cooling is needed, providing high heat transfer coefficients in compact dimensions, while maintaining overall device compactness.
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 design achieves improved heat transfer and reduced pressure loss, allowing for effective cooling of induction charging devices, particularly in areas with high electromagnetic losses, while maintaining a compact and adaptable structure.
Implementation Method 1
a flow channel through which a flow path for a heat exchanger fluid extends... through which the heat exchanger fluid can flow
Implementation Method 2
heat transfer between the heat exchanger fluid and the base plates... heat flow that can be transferred between a heat source and the heat transfer fluid
Implementation Method 3
the heat exchanger has a flow guide arrangement for guiding the heat exchanger fluid... to provide a favorable flow pattern within the flow channel, for example, a turbulent flow
Data Source
Figure 1
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AI summary
The invention relates to a heat exchanger (1) for an inductive charging device (24) of a motor vehicle, comprising two bases (2, 3) that form a heat exchanger housing (4) and a flow channel (5), through which a flow path (6) for a heat exchanger fluid extends. The flow channel (5) has channel passages (8, 9) along the flow path (6), each channel passage having a flow cross-section (13, 14) oriented transversely to the flow path (6), wherein flow cross-sections (13) of first channel passages (8) of the channel passages (8, 9) are designed to be flatter than flow cross-sections (14) of second channel passages (9) of the channel passages (8, 9). The heat exchanger also comprises a flow conducting assembly (15), which is inserted into the flow channel (5), for conducting the heat exchanger fluid. The invention also relates to an inductive charging device (24) comprising a cooling element (36).