Communication circuit, communication system, and air conditioning system
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems in air conditioning systems utilize separate RS485 communication buses for master and slave devices, requiring indirect signal transmission through a master device, leading to inefficient resource usage and poor real-time performance.
Innovation Solution
A communication circuit with a master control chip, first and second data bus transceivers, and a switch circuit that allows automatic switching between the buses, enabling direct communication between a central controller and slave devices without intermediation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate RS485 communication buses are used for master and slave devices with indirect signal transmission through master device, then device interconnection is achieved, but communication efficiency is poor and real-time performance is low
Solution Approach 1:
The communication system is segmented into two independent RS485 buses: a first bus for master-device communication and a second bus for slave-device communication. This segmentation allows simultaneous independent communication channels, eliminating the need for indirect signal transmission through the master device and improving real-time performance.
Solution Approach 2:
A switch circuit is introduced as an intermediary component to control the connection between the first and second RS485 buses. The switch circuit enables automatic switching between direct communication mode (through switch circuit) and indirect communication mode (through master device), optimizing communication efficiency for different scenarios.
2Productivity
If indirect signal transmission through master device is used, then device interconnection is achieved, but resource usage efficiency is poor
Solution Approach 1:
The switch circuit provides multi-functionality by supporting both direct connection mode (improving resource efficiency) and indirect connection mode (maintaining system compatibility). This universal component allows the system to adapt to different communication requirements without increasing overall system complexity.
Solution Approach 2:
The first and second RS485 buses are merged through the switch circuit, allowing them to function as interconnected communication channels. This merging enables efficient resource utilization by allowing direct slave-to-slave communication while maintaining the original master-controlled communication path when needed.
3Productivity
If automatic switching between two independent RS485 buses is implemented, then communication efficiency is improved, but circuit complexity increases
Solution Approach 1:
The switch circuit is configured to automatically switch between the first and second RS485 buses based on communication requirements without requiring complex external control logic. This self-service capability simplifies the control mechanism while maintaining high data transmission efficiency through automatic path selection.
Data Source
AI summary
The present invention relates to a communication circuit, a communication system, and an air conditioning system provided with the communication circuit and the communication system. The communication circuit includes a control chip, a first data bus transceiver, a second data bus transceiver, and a switch circuit. The first data bus transceiver has one end connected to the control chip and the other end connected to the first external device; the second data bus transceiver has one end connected to the control chip and the other end connected to the second external device; and the switch circuit is connected to the first data bus transceiver and the second data bus transceiver. The communication circuit realizes automatic switching of two independent RS485 communication buses according to a requirement of communication data, thereby realizing device interconnection and real-time data exchange on the two independent RS485 communication buses. Accordingly, the communication efficiency is improved.