EV Air Conditioner Defrosting Control via Speed and Temperature Feedback
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Solution Overview
Problem
Heat pump air conditioners in battery electric vehicles face inefficiencies in defrosting due to high-speed air flow, leading to incomplete defrosting, increased power consumption, and prolonged defrosting cycles, especially at high speeds and low external temperatures, affecting passenger comfort and system reliability.
Innovation Solution
An air conditioner control system that includes environmental temperature sensors, heat exchanger temperature sensors, and speed monitoring systems to determine when to enter a defrosting mode based on preset temperature and speed thresholds, ensuring complete defrosting and shortening the defrosting cycle by integrating actual driving speed and environmental temperature data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air conditioner enters defrosting mode under conventional control, then the defrosting process is initiated, but the high-speed air flow carries away defrosting heat, resulting in incomplete defrosting and extended defrosting cycles
Solution Approach 1:
The patent dynamically adjusts the defrosting control strategy based on real-time vehicle speed and temperature conditions. When vehicle speed exceeds a preset threshold during defrosting mode, the system modifies operational parameters to compensate for increased heat loss, ensuring complete defrosting while adapting to changing conditions rather than using a fixed control approach
Solution Approach 2:
The system continuously monitors vehicle speed and temperature parameters during defrosting operation, using this feedback to determine whether to maintain or adjust defrosting mode. This closed-loop control ensures the defrosting process completes effectively even when high-speed air flow conditions are detected, preventing incomplete defrosting and reducing cycle duration
2Reliability
If the air conditioner enters defrosting mode under conventional control, then the defrosting process is initiated, but significant heat is lost due to high-speed air flow, increasing power consumption
Solution Approach 1:
The system dynamically adjusts defrosting operational parameters based on real-time vehicle speed and temperature conditions. When high-speed air flow conditions are detected during defrosting, the system modifies heat pump operation to compensate for increased heat loss, achieving effective defrosting while optimizing energy consumption rather than operating at fixed high power levels
Solution Approach 2:
The patent changes operational parameters (such as heat pump capacity, fan speed, or temperature setpoints) based on detected vehicle speed and temperature conditions. This parameter adjustment allows the system to maintain defrosting effectiveness under varying air flow conditions while reducing unnecessary energy consumption during high-speed operation
3Ease of operation
If the air conditioner operates in heating mode under high-speed and low-temperature conditions, then heating is provided, but repeated incomplete defrosting occurs and frost accumulates, affecting system reliability
Solution Approach 1:
The system uses feedback from temperature and speed sensors to determine when to initiate or extend defrosting cycles during heating operation. Under high-speed and low-temperature conditions, the feedback mechanism triggers appropriate defrosting interventions to prevent frost accumulation, maintaining both heating functionality and system reliability
Solution Approach 2:
The system performs preliminary defrosting actions before frost accumulation becomes severe by monitoring temperature and speed conditions. When high-speed and low-temperature conditions are detected, the system proactively initiates defrosting cycles to prevent incomplete defrosting and frost buildup, ensuring reliable heating 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
The solution increases defrosting efficiency, reduces heat waste, lowers power consumption, and prevents incomplete defrosting, enhancing passenger comfort and system reliability by optimizing the defrosting process based on real-time environmental and operational conditions.
Implementation Method 1
an environmental temperature sensor configured to detect a first temperature value of an external environment of a target object
Implementation Method 2
a heat exchanger temperature sensor configured to detect a second temperature value of an outside heat exchanger of an air conditioner system
Data Source
AI summary
The present disclosure discloses an air conditioner control method and system, a non-transitory storage medium and a processor. The control system includes an environmental temperature sensor configured to detect a first temperature value of an external environment of a target object; a heat exchanger temperature sensor configured to detect a second temperature value of an outside heat exchanger of an air conditioner system; a speed monitoring system configured to detect a driving speed of the target object; and a control system, connected to the environmental temperature sensor, the heat exchanger temperature sensor and the speed monitoring system, and configured to determine according to the first temperature value, the second temperature value and the driving speed, whether the air conditioner system enters a defrosting mode in a case that the air conditioner system operates in a heating mode.