Vehicle Cabin Ventilation Using Battery-Powered HVAC Preconditioning
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Solution Overview
Problem
In extreme temperature environments, vehicle cabin temperatures can become unbearable for occupants, even with air-conditioning or heating turned on, as existing systems require manual adjustment and may not effectively maintain a comfortable temperature when the vehicle is turned off.
Innovation Solution
An inside ventilation method that uses a battery-operated fan to control the HVAC system based on the vehicle's interior and battery temperatures, automatically adjusting to maintain a comfortable temperature range of 20-30°C when the vehicle is turned off, by actuating the fan and HVAC components such as heaters or air-conditioners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the air-conditioning or heater is turned on in extreme temperature environments, then the temperature control system can circulate air to adjust cabin temperature, but the system requires manual adjustment and may not effectively maintain comfortable temperature when the vehicle is turned off
Solution Approach 1:
The system performs preliminary temperature adjustment actions before the occupant enters the vehicle. When the vehicle is turned off, the battery-operated fan and HVAC system are automatically activated to pre-condition the cabin temperature based on stored temperature preferences, ensuring comfort is established before occupancy without requiring manual adjustment at the moment of entry.
Solution Approach 2:
The temperature control system operates autonomously using the battery power source to drive the fan and HVAC components. The system self-regulates cabin temperature by monitoring internal conditions and automatically adjusting airflow and temperature without requiring manual intervention from the occupant, making the system self-sufficient during the pre-conditioning phase.
2Ease of operation
If the battery-operated fan and HVAC system are activated to maintain cabin temperature, then occupant comfort is improved, but energy consumption from the battery increases
Solution Approach 1:
The battery-operated fan and HVAC system operate in periodic cycles rather than continuously. The system activates the fan and HVAC components only when temperature deviation is detected, maintains operation until the target temperature range is achieved, then enters a standby or reduced-power state, creating an on-demand periodic operation pattern that reduces overall energy consumption while maintaining comfort.
Solution Approach 2:
The system applies partial action by activating only the necessary components (fan and HVAC) for the duration needed to reach the target temperature, rather than running all vehicle systems continuously. The battery power is selectively applied to the minimum required subsystems for the minimum required time to achieve the comfort goal, avoiding excessive energy consumption from unnecessary system operation.
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 method ensures a comfortable cabin temperature is maintained when entering the vehicle, improving occupant comfort and reducing the need for manual adjustments, while also enhancing battery performance and durability by managing temperature extremes.
Implementation Method 1
a inside temperature judging process of sensing, by one or more temperature sensors an inside temperature of the vehicle when the operating signal is transferred and judging whether the inside temperature is deviated from a required temperature range; a control process of controlling heating, ventilation, and air conditioning system (HVAC system) and operation of a battery operated fan
Implementation Method 2
a inside temperature judging process of sensing, by one or more temperature sensors an inside temperature of the vehicle
Implementation Method 3
when it is determined that the inside temperature is less than 20° C., the heater of the HVAC system and the battery operated fan may be controlled based on the comparison of the inside temperature and the battery temperature
Implementation Method 4
when it is determined that the inside temperature is more than 30° C., the air-conditioner of the HVAC system and the to battery operated fan may be controlled based on the comparison of the inside temperature and the battery temperature
Data Source
AI summary
Disclosed is an inside ventilation system of a vehicle for a driver or an occupant to achieve a more comfortable inside environment in the summer or winter. The inside ventilation system includes a control unit configured to receive an operating signal from a smart key, sense an inside temperature of the vehicle when the operating signal is transferred and judging whether the inside temperature is deviated from a required temperature range; a comparison process of comparing the inside temperature and a battery temperature when the inside temperature is deviated from the required temperature range; and a control process of controlling a heating, ventilation, and air conditioning system (HVAC) and an operation of a battery operated fan by comparing the inside temperature and the battery temperature.