Vehicle Air Conditioning Power Control Across AC, DC, and Solar
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Solution Overview
Problem
Current air conditioning systems in recreational vehicles and marine craft face limitations in efficiency due to high current demand, lack of intelligence in power management, and inability to utilize multiple power sources, including solar panels, leading to inefficient power usage and limited control over operation.
Innovation Solution
An air conditioning system with a variable speed motor and controller capable of selecting between AC and DC power sources, auto-tuning based on available power, and coordinating multiple motors for efficient operation, incorporating features like inverters, expansion valves, and heat exchangers to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional air conditioning systems are used with fixed speed motors, then the system structure is simple, but the power consumption is high and efficiency is limited
Solution Approach 1:
The patent applies dynamics by replacing fixed-speed motors with variable-speed motors that can adjust their operating speed based on cooling demands and available power. The controller dynamically modulates motor speed to optimize energy consumption, allowing the system to operate efficiently across different power sources (solar, grid, battery) and cooling loads, thereby reducing overall power consumption while maintaining adequate cooling performance.
Solution Approach 2:
The patent implements parameter changes by enabling the air conditioning system to operate with different power sources (AC voltage from grid, DC voltage from battery or solar) and by varying operational parameters such as motor speed, compressor capacity, and fan rotation. The controller adjusts these parameters based on available power and cooling needs, optimizing energy usage without requiring a complete redesign of the system architecture.
2Adaptability or versatility
If air conditioning systems are designed to work with multiple power sources, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing a controller that can universally accept multiple power sources (AC voltage from grid, DC voltage from battery, and DC voltage from solar panels). The controller incorporates voltage detection and automatic selection capabilities, allowing it to adapt to different power sources without requiring separate control systems for each source, thereby achieving multi-functionality while managing complexity through integrated design.
Solution Approach 2:
The patent implements self-service through automatic power source selection and system configuration. The controller automatically detects the available power source, configures the appropriate operating mode, and adjusts system parameters without user intervention. This self-configuration capability reduces the burden on users and simplifies operation, offsetting the increased hardware complexity with automated intelligence.
3Ease of operation
If air conditioners provide only basic fan speed settings, then the ease of operation is maintained, but the power management intelligence is limited
Solution Approach 1:
The patent applies feedback by implementing a controller that continuously monitors power source availability, power consumption levels, and cooling performance. Based on this feedback, the controller automatically adjusts motor speeds, compressor operation, and fan rotation to optimize energy efficiency. This closed-loop control provides intelligent power management while maintaining simple user interaction, as users only need to set basic temperature preferences without managing complex power parameters.
Solution Approach 2:
The patent implements self-service through automated power management where the controller independently makes decisions about power source selection, motor speed adjustment, and system operation based on real-time conditions. The system self-optimizes its performance without requiring users to understand or configure power management parameters, thereby providing high intelligence in power management while keeping the user interface simple and easy to operate.
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
Enhances efficiency by allowing operation from various power sources, including solar panels, and optimizing power usage through intelligent control, thereby improving performance and reducing power consumption.
Implementation Method 1
a variable speed motor operably connected to the compressor, the variable speed motor driving rotation of the compressor
Implementation Method 2
The condenser heat exchanger may be an open water heat exchanger. The condenser heat exchanger may be an open air heat exchanger.
Implementation Method 3
an evaporator in fluid communication with the compressor and in air communication with the blower
Data Source
AI summary
Present embodiments relate to an air conditioning system for a vehicle. More specifically, but without limitation, present embodiments relate to a vehicle air conditioning system which comprises a variable speed motor and a controller which is capable of auto selecting an input current and which auto tunes according to the AC or DC voltage presented at the input. A controller is also provided which is capable of controlling two or more motors for an air conditioning system.