Air Conditioner Outdoor Unit Independent Compressor Frequency Control
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Solution Overview
Problem
Conventional variable-frequency air conditioning systems require complex and costly communication between indoor and outdoor apparatuses to control the compressor, leading to increased complexity and costs.
Innovation Solution
An air conditioning system where the outdoor apparatus includes a variable-frequency compressor and a controller that performs frequency control independently of the indoor apparatus, without specific communication, using operation parameters such as working time, stop-start number, and pressure sensors to adjust refrigerant saturation temperature for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If dedicated installation and specific communication mode are used to control the compressor in conventional variable-frequency air conditioners, then the compressor can be controlled to operate with certain frequency, but the structure becomes complex and the cost increases
Solution Approach 1:
The outdoor unit's controller independently controls the compressor frequency based on its own detected operation parameters (current, temperature, pressure) without requiring complex communication with the indoor unit. The outdoor unit serves itself by making control decisions autonomously, eliminating the need for dedicated communication protocols and reducing system complexity.
Solution Approach 2:
The control function is segmented and localized to the outdoor unit's controller, which independently handles compressor frequency control based on locally detected parameters. This segmentation separates the control logic from the indoor unit, allowing the indoor unit to focus solely on temperature control while the outdoor unit manages compressor operation autonomously.
2Ease of operation
If the indoor apparatus sends corresponding signals to the outdoor apparatus to control each element, then the air conditioning system can operate, but the structure becomes complex and the cost increases
Solution Approach 1:
The outdoor unit's controller independently detects operation parameters (current, temperature, pressure) and autonomously adjusts compressor frequency without requiring signals from the indoor unit. This self-service approach eliminates complex communication structures while maintaining ease of operation through autonomous decision-making based on real-time parameters.
Solution Approach 2:
The outdoor unit's controller uses feedback from locally detected operation parameters (current, temperature, pressure) to continuously adjust compressor frequency. This closed-loop feedback system enables autonomous control without complex communication, as the outdoor unit responds to its own operational state in real-time.
Data Source
AI summary
An air conditioning system, an outdoor apparatus of an air conditioning system and a method for controlling an air conditioning system are provided. The air conditioning system includes: an indoor apparatus and an outdoor apparatus. The outdoor apparatus includes a variable-frequency compressor and a controller configured to perform a variable-frequency control on the variable-frequency compressor according to operation parameters of the variable-frequency compressor and independent from the indoor apparatus.