Air conditioner and data transmission method based on power line communication therefor, and storage medium
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
PLC-based communication in air conditioners is prone to interference from household appliances, leading to unreliable data transmission due to electromagnetic noise.
Innovation Solution
The air conditioner adjusts communication intervals and uses multiple sub-carrier signals with different bands to transmit data over power lines, avoiding noise interference and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PLC-based communication uses a single carrier band, then device complexity is low, but communication reliability deteriorates due to electromagnetic interference from household appliances
Solution Approach 1:
The communication system segments the carrier signal into multiple sub-carrier signals with different center frequencies. Each sub-carrier operates in a separate frequency band, allowing the system to avoid interference from specific household appliances by selecting sub-carriers that do not overlap with noise bands. This segmentation transforms a single vulnerable communication channel into multiple diverse channels, improving overall communication reliability without requiring complete system redesign
Solution Approach 2:
The system dynamically changes communication parameters by adjusting the center frequencies of sub-carrier signals based on detected noise bands. When electromagnetic interference is detected from household appliances, the system modifies the frequency parameters of active sub-carriers to avoid noisy bands. This parameter adaptation allows the communication system to maintain reliability in varying electromagnetic environments while using standard PLC hardware
2Productivity
If data transmission frequency is increased, then communication speed improves, but power consumption and interference susceptibility increase
Solution Approach 1:
The communication system implements periodic transmission intervals between data packets rather than continuous transmission. During these periodic intervals, the system can detect noise bands and adjust sub-carrier frequencies before the next transmission. This periodic action allows the system to maintain adequate data transmission speed while reducing overall power consumption and minimizing interference susceptibility by transmitting only when conditions are favorable
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 approach reduces data transmission frequency and enhances anti-noise interference capabilities, ensuring reliable communication by adapting to operation parameter changes and environmental noise.
Implementation Method 1
The indoor unit modulates the communication data into multiple sub-carrier signals, and couples multiple sub-carrier signals to the power line
Implementation Method 2
A sending side modulates user data by using a modulation technology, loads a carrier signal carrying information on the power line, and then transmits the carrier signal on the power line
Implementation Method 3
A receiving side demodulates the user data by using a demodulation technology, and takes it out of the power line
Data Source
AI summary
An air conditioner and a data transmission method based on power line communication therefor, and a storage medium are provided. According to the method, a working parameter is acquired by an indoor unit; if it is determined that the working parameter meets a set condition, a communication interval is adjusted through an outdoor unit from a first communication interval to a second communication interval; and communication data is sent to the outdoor unit on the basis of the second communication interval and by means of a power line. In order to send the communication data to the outdoor unit, the communication data is modulated by the indoor unit into multiple sub-carrier signals and the sub-carrier signals are coupled to the power line. Each sub-carrier signal corresponds to a different frequency band, and the first communication interval is larger than the second communication interval.