Vehicle Air Conditioning Control Device for Pre-Conditioning
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Solution Overview
Problem
Existing air conditioning control devices for vehicles often fail to achieve the desired interior temperature by the planned departure time due to climate conditions and inefficient charging of electricity storage devices, especially when temperatures are low or high, leading to prolonged charging times and insufficient pre-air conditioning.
Innovation Solution
An air conditioning control device that adjusts the air conditioner's operation start time based on outdoor air temperature, electricity storage device temperature, and climate information to ensure the vehicle interior reaches the target temperature by the planned departure time, while optimizing charging times by regulating the electricity storage device temperature before charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If pre-air conditioning is performed using electric power from external power source, then the vehicle interior temperature becomes appropriate by departure time, but the charging time of electricity storage device increases when temperature is low or high
Solution Approach 1:
The system performs preliminary temperature adjustment of the electricity storage device before charging when outdoor temperature is low or high. This preliminary action prevents temperature-related charging time delays by ensuring the battery is at an optimal temperature range before the charging process begins, thereby resolving the contradiction between achieving appropriate interior temperature and minimizing charging time.
Solution Approach 2:
The air conditioning system serves dual purposes: it conditions the vehicle interior while simultaneously conditioning the electricity storage device temperature. By using the air conditioner to pre-heat or pre-cool the battery as a byproduct of interior temperature control, the system eliminates the need for separate battery temperature management, thereby reducing total time required for both pre-air conditioning and charging operations.
2Ease of operation
If operator determines pre-air conditioning duration manually, then operation simplicity is maintained, but the vehicle interior temperature may not become appropriate by departure time
Solution Approach 1:
The system continuously monitors outdoor temperature, vehicle interior temperature, and departure time to dynamically calculate and adjust the pre-air conditioning start time. This feedback mechanism ensures the vehicle interior reaches the appropriate temperature by departure time while maintaining simple operator interaction, as the system automatically optimizes parameters based on real-time conditions.
Solution Approach 2:
The pre-air conditioning control system dynamically adjusts the operation start time based on varying climate conditions and departure schedules. Rather than using fixed duration settings, the system adapts its control parameters in real-time according to outdoor temperature, required interior temperature, and available time before departure, thereby ensuring optimal performance across different operating scenarios.
Data Source
AI summary
An air conditioning control device for a vehicle has an air conditioner for conditioning air in a vehicle interior, an input receiving unit for receiving inputs of both planned departure time of the vehicle and a target temperature in the vehicle interior, a pre-air-conditioning control unit for starting operation of the air conditioner at an air conditioning start time before the planned departure time so that the temperature in the vehicle interior at the planned departure time becomes the target temperature, and an outdoor air temperature acquisition unit for acquiring outdoor air temperature. The pre-air-conditioning control unit changes the air conditioning operation start time based on the outdoor air temperature acquired by the outdoor air temperature acquisition unit.