Vehicle HVAC Ventilation Control for Occupancy and Speed Changes
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Solution Overview
Problem
Conventional air conditioning systems for vehicles operate based on preset target temperatures, failing to adapt to varying user needs such as the number of occupants, vehicle speed, and temperature differences between indoors and outdoors, resulting in limited comfort adjustments.
Innovation Solution
An air conditioning control apparatus and method that utilizes sensors to detect vehicle occupants, speed, and temperature, and a controller to adjust ventilation by regulating the intake door, blower motor, and rear fan to optimize air flow based on these conditions, ensuring improved comfort by increasing external air intake and circulation according to specific occupancy and speed thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If air conditioning operates according to preset target temperature, then temperature control is simple and reliable, but various user needs cannot be satisfied
Solution Approach 1:
The air conditioning system dynamically adjusts ventilation amount based on real-time detection of occupancy, vehicle speed, and temperature conditions. The controller modifies operational parameters of the intake door and blower motor continuously rather than using fixed preset modes, enabling adaptation to varying user needs while maintaining manageable system complexity through rule-based control logic
Solution Approach 2:
The system incorporates sensors that continuously detect occupancy, vehicle speed, and temperature differences between indoor and outdoor environments. This feedback information is processed by the controller to automatically adjust ventilation settings, enabling the system to adapt to user needs without requiring complex manual intervention or multiple preset modes
2Quantity of substance
If external air intake is increased for more occupants, then ventilation effectiveness improves, but energy loss increases
Solution Approach 1:
The system changes operational parameters (intake door opening degree, blower motor speed) based on detected conditions such as occupancy and vehicle speed. By dynamically adjusting these parameters rather than maintaining fixed high ventilation settings, the system provides adequate ventilation for the actual number of occupants while minimizing unnecessary energy consumption during low-occupancy or high-speed conditions
3Productivity
If ventilation amount is increased for high vehicle speed, then air circulation effectiveness improves, but air conditioning efficiency decreases
Solution Approach 1:
The system dynamically adjusts ventilation amount based on detected vehicle speed. At high speeds where natural air exchange is already enhanced by vehicle movement, the controller reduces blower motor speed and intake door opening to maintain adequate circulation while improving energy efficiency. At lower speeds, the system increases ventilation to ensure sufficient air exchange
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 enhances vehicle comfort by dynamically adjusting ventilation to match changing occupancy and speed conditions, providing effective temperature management and air circulation, thereby improving passenger comfort and satisfaction.
Implementation Method 1
a blower motor that moves the external air into the vehicle or moves the internal circulation air back into the vehicle
Implementation Method 2
a rear fan that exhausts air inside the vehicle to the outside of the vehicle
Implementation Method 3
an intake door that adjusts a vehicle internal inflow amount of the external air and internal circulation air circulated inside the vehicle
Data Source
AI summary
An air conditioning control apparatus for a vehicle according to the present disclosure includes a sensor that senses a number of vehicle occupants, a vehicle speed, and an indoor temperature and an outdoor temperature of the vehicle, an air conditioner that adjusts an amount of air introduced from an outside or exhausted to the outside, and a controller that controls the air conditioner based on the number of vehicle occupants, the vehicle speed, and the indoor temperature and the outdoor temperature of the vehicle. According to the present embodiment, the comfort inside the vehicle may be improved by adjusting the ventilation amount depending on the number of vehicle occupants, the vehicle speed, and the indoor temperature and the outdoor temperature of the vehicle.