Air conditioning system
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Solution Overview
Problem
The existing air conditioning systems face challenges in increasing communication speed while minimizing noise interference in the communication line, making it difficult to achieve high-speed communication effectively.
Innovation Solution
The air conditioning system employs a signal adjustment mechanism, including noise-cut transformers and coupling capacitors, to adjust the frequency components of communication signals, thereby reducing noise influence and enabling high-speed communication by limiting the frequency band affected by noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the communication speed in the air conditioning communication line is increased to improve controllability, then the communication efficiency is improved, but the influence of noise from the inverter circuit becomes larger
Solution Approach 1:
The communication signal is divided into multiple frequency bands, and noise filtering is applied selectively to specific frequency ranges affected by inverter circuit noise, allowing high-speed communication in clean frequency bands while suppressing noise in affected bands
Solution Approach 2:
The system dynamically adjusts communication parameters including frequency selection and signal level adjustment based on detected noise conditions, enabling high-speed communication when noise is low and switching to noise-resistant modes when inverter noise increases
2Adaptability or versatility
If the communication line is extended to connect more indoor units, then the system coverage is improved, but the noise influence becomes larger
Solution Approach 1:
The communication line is divided into multiple frequency bands, allowing extended network coverage while maintaining signal integrity by routing communication through frequency bands less affected by cumulative noise from multiple inverter units
Solution Approach 2:
Noise filtering mechanisms act as intermediaries between the communication signal and the noisy inverter circuit environment, enabling reliable communication over extended distances by blocking noise frequencies while passing communication frequencies
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 effectively reduces noise interference, allowing for high-quality, high-speed communication between outdoor and indoor units by adjusting the signal levels and frequency components, thus improving controllability and communication efficiency.
Implementation Method 1
the signal adjustment mechanism includes a noise-cut transformer (23, 43) connected with an air conditioning signal line (6)
Implementation Method 2
The air conditioning system employs a signal adjustment mechanism, including noise-cut transformers and coupling capacitors, to adjust the frequency components of communication signals
Data Source
AI summary
An air conditioning system includes an outdoor unit and an indoor unit connected to the outdoor unit through an air conditioning communication line. The outdoor unit includes: a control unit; a compressor; a fan; a compressor inverter; a fan inverter; a heat exchanger; and valves of various types. The control unit of the outdoor unit has a coupling capacitor and a noise-cutting transformer which are between a communication circuit and the air conditioning communication line.