Vehicle Thermal Conditioning With Reversible Airflow Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermal conditioning systems in electric vehicles face challenges in efficiently managing heat dissipation without compromising aerodynamics, leading to increased drag and complexity due to the need for large radiators and complex duct systems.
Innovation Solution
A thermal conditioning system with a fan, first heat exchanger, outside and cabin air ducts, and a control unit that switches between modes to direct airflow for heating or cooling, utilizing a single airflow path for both functions, reducing complexity and improving heat transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large radiator is used to transfer sufficient heat from electrical components, then heat dissipation capability is improved, but aerodynamic drag increases and device complexity increases
Solution Approach 1:
The HVAC unit's heat exchanger serves dual purposes: it provides heating to the cabin during normal operation and functions as a radiator for cooling electrical components when the fan operates in reverse. This eliminates the need for a separate radiator, reducing aerodynamic drag and device complexity while maintaining adequate heat dissipation capability through the existing heat exchanger surface area
Solution Approach 2:
The fan's rotation direction is inverted to reverse the airflow path. When rotating in reverse, the fan draws air from the cabin through the heat exchanger and expels it to the outside environment, enabling the heat exchanger to function as a radiator for cooling electrical components without requiring additional hardware
2Adaptability or versatility
If a complex duct system with multiple valves is used to direct airflow for both heating and cooling, then airflow control flexibility is improved, but device complexity increases
Solution Approach 1:
A single duct system handles both heating and cooling functions by working with the fan in different rotation directions. The same duct that delivers heated air to the cabin during forward fan rotation becomes the exhaust path for cooled air during reverse fan rotation, eliminating the need for separate ducts and multiple control valves
Solution Approach 2:
The fan's bidirectional rotation capability allows the system to invert the airflow direction through the same duct. Forward rotation delivers air to the cabin for heating, while reverse rotation extracts air from the cabin for cooling, providing airflow control flexibility without additional valves or complex ducting
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 system effectively manages heat dissipation by alternating airflow direction to optimize cabin comfort and external heat transfer, minimizing drag and complexity while maintaining efficient temperature regulation.
Implementation Method 1
a first heat exchanger (104)...arranged to transfer heat to the flow of air (108)
Implementation Method 2
a fan (102)...configured to generate a flow of air (108)
Data Source
AI summary
A thermal conditioning system and a cabin. The thermal conditioning system has a fan, a first heat exchanger, an outside air duct, a cabin air duct, a sensor, and a control unit. The thermal conditioning system is operated in a first mode and a second mode. In the first mode, the fan rotates in a first direction to direct the flow of air along a first flow path. In the second mode, the fan rotates in a second direction opposite to the first direction to direct the flow of air along a second flow path. The sensor provides a signal representative of a temperature of a part of the vehicle. The control unit switches the thermal conditioning system between the first mode and the second mode based on the signal.