Vehicle Cabin Blower Venting for Off-Key Temperature Reduction
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Solution Overview
Problem
Vehicle air conditioning systems fail to effectively reduce cabin temperature when the vehicle is turned off, leading to increased fuel consumption and reduced efficiency.
Innovation Solution
A method and device that utilize a blower motor powered by the vehicle's battery to discharge hot air from the cabin to the outside when the vehicle is off, using a controller that measures external temperature and operates based on GPS time information and SOC level, entering an air conditioning sleep mode when conditions are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the air conditioning system operates to cool the cabin when the vehicle is off, then the cabin temperature is reduced, but the battery energy is consumed
Solution Approach 1:
The system performs preliminary cooling action before the vehicle is needed by the user. The controller activates the blower motor to discharge hot air from the cabin before the driver arrives or before the vehicle is started, so that when the vehicle is actually used, the cabin is already cooled, reducing or eliminating the need for energy-consuming air conditioning operation during driving.
Solution Approach 2:
The system uses the vehicle's existing battery and blower motor components to perform the cooling function without requiring additional dedicated cooling equipment. The blower motor, already part of the vehicle's air intake system, is repurposed to discharge hot air from the cabin, allowing the system to serve itself using existing resources rather than requiring separate active cooling machinery.
2Productivity
If the blower motor operates continuously to discharge hot air, then the temperature reduction efficiency is improved, but the battery discharge rate increases
Solution Approach 1:
The controller operates the blower motor in periodic cycles rather than continuously. The system activates the blower for specific time intervals to discharge hot air, then pauses operation, creating a periodic on-off cycle. This approach maintains temperature reduction effectiveness while significantly reducing overall battery energy consumption compared to continuous operation.
Solution Approach 2:
The system applies partial action by operating the blower motor at moderate power levels for specific durations rather than at full capacity continuously. The controller manages the blower operation to provide sufficient cooling effect while avoiding excessive energy consumption, achieving an optimal balance between cooling performance and battery preservation.
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
Effectively reduces cabin temperature and improves fuel efficiency by ventilating hot air outside the vehicle, enhancing the vehicle's energy management and reducing fuel consumption.
Implementation Method 1
discharging air inside the vehicle to the outside of the vehicle by using a blower
Data Source
AI summary
A method of reducing a temperature inside a vehicle includes: when a current time is the same as a setting time of a vehicle after the vehicle is turned off, measuring, by a controller, a temperature outside the vehicle based on an output signal of an outside air temperature sensor of the vehicle; and discharging, by the controller, air inside the vehicle to the outside of the vehicle by receiving power from a battery of the vehicle and operating a blower motor, which drives a blower, based on an operation time of the blower motor according to the temperature outside the vehicle.