Device for heating a heat-transfer liquid circulating within a circuit equipping an electric or hybrid vehicle
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Solution Overview
Problem
Existing heating devices for electric or hybrid vehicles are bulky and inefficient due to the spiral arrangement of the heating resistor, which increases the overall volume and reduces the heating efficiency of the heat-transfer liquid.
Innovation Solution
The heating device features a heating resistor that extends between two blocks secured to the casing, with the resistor primarily inscribed within a plane intersecting the axes of the blocks, reducing bulk and optimizing heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the heating resistor is arranged in a spiral within the circulation channel, then the heating device can provide sufficient heating power, but the overall volume of the heating device becomes significant and bulky
Solution Approach 1:
The heating resistor is changed from a spiral three-dimensional arrangement to a planar two-dimensional arrangement. The resistor extends between a first block and a second block within a plane, reducing the volume occupied by the heating device while maintaining the necessary heating path length for sufficient heating power.
2Device complexity
If the heating resistor is arranged in a spiral, then the device structure is simplified, but the heat-transfer liquid flows at a distance from the heating resistor, reducing heating efficiency
Solution Approach 1:
The heating resistor is positioned to ensure that the heat-transfer liquid flows in close proximity to it along the entire length of the resistor. The circulation channel is configured so that the liquid flows alongside the resistor within the plane, minimizing distance and maximizing heat transfer efficiency locally throughout the system.
3Volume of stationary object
If the heating resistor extends along an axis perpendicular to the circulation channel, then the device can be compact in one direction, but the heat-transfer liquid is likely to be at a distance from the heating resistor
Solution Approach 1:
The heating resistor is arranged within a plane that intersects the axes of both the first and second blocks, rather than extending perpendicular to the circulation channel. This planar configuration ensures the resistor remains compact while maintaining close proximity to the flowing heat-transfer liquid throughout its length.
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 results in a more compact heating device with improved heating efficiency, as the heat-transfer liquid is more effectively heated due to the reduced distance from the resistor and the optimized resistor configuration.
Implementation Method 1
When an electrical current flows through the latter, there is an increase in the temperature of the heating resistor as a result of Joule heating, which causes the heat-transfer liquid to heat up upon contact
Data Source
AI summary
A heating device includes a heat-transfer liquid that circulates within a heat-transfer liquid circuit. The heating device includes a casing that houses a circulation channel. The channel contains a heating resistor extending between a first and second block secured to the casing. The first block extends along a first axis and the second block extends along a second axis. The heating resistor extends at least partially within a plane that intersects at least one of the first axis or second axis.