Vehicle Air Conditioning Heat Accumulation Control
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Solution Overview
Problem
Existing air conditioning devices for vehicles waste energy by blowing hot air into the vehicle interior before an occupant is present, causing the heat to diffuse and reducing the effectiveness of heating the driver's seat.
Innovation Solution
An air conditioning device with a bypass passage and air mixing doors that accumulate heat in the air conditioning case before starting the vehicle's air conditioning, preventing heat from leaking out and efficiently delivering heated air only after the occupant enters the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If hot air is blown out only from the driver's-seat foot blowing port before the occupant gets on the vehicle, then the driver's seat can be preferentially heated, but the hot air diffuses from the driver's seat to the entire vehicle interior causing wasteful energy consumption
Solution Approach 1:
The system performs preliminary heating of the driver's seat by blowing hot air through the foot blowing port before the occupant enters the vehicle. The control unit detects when the occupant has entered and then switches to a different blowing mode, allowing the pre-heated seat to retain warmth while avoiding unnecessary heating of the entire vehicle interior.
Solution Approach 2:
The driver's seat utilizes the hot air blown through the foot blowing port to self-heat before the occupant enters. The seat structure itself serves as the heating target, absorbing and retaining thermal energy without requiring continuous active heating once the occupant is present.
2Reliability
If the driver's seat is heated preferentially before the occupant enters, then the heating effect on the driver's seat is enhanced, but the hot air diffuses to the entire vehicle interior reducing the effectiveness of air conditioning
Solution Approach 1:
The system performs preliminary heating of the driver's seat by blowing hot air through the foot blowing port before the occupant enters the vehicle. This ensures the seat is already warm when the occupant arrives, providing immediate comfort without needing to heat the entire vehicle interior first.
Solution Approach 2:
The control unit dynamically switches between different blowing modes based on whether the occupant has entered the vehicle. Before entry, hot air is directed to the foot blowing port for seat heating; after entry, the system transitions to a mode that distributes air conditioning more effectively throughout the vehicle interior, optimizing performance for each operational phase.
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 solution reduces energy wastage by ensuring that heat is efficiently directed to the vehicle interior only after the occupant is present, enhancing the heating of the driver's seat while minimizing energy consumption.
Implementation Method 1
a heater core disposed in the air conditioning case to heat the air flow drawn through the suction port
Data Source
AI summary
An air conditioning device for a vehicle includes a door control unit that controls multiple blowing port doors or an air mix door to prevent a heat generated from a heater core from leaking out of an air conditioning case before air conditioning of a vehicle interior is determined to be started. The air conditioning device includes an air conditioning control unit that performs the air conditioning of the vehicle interior by controlling the multiple blowing port doors to open at least one of multiple blowing ports and blow out a heat in the air conditioning case as hot air to the vehicle interior from the at least one blowing port after the air conditioning in the vehicle interior is determined to be started.