Communication Bus Level Switching for Separate Power and Data

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Solution Overview

Problem

The existing air-conditioning communication systems using Home Bus and PLC buses face challenges in separating power supply and data transmission, leading to increased volume, reduced communication distance, and interference issues due to the need for inductance to block DC power during data interaction.

Innovation Solution

A control method and apparatus that periodically output first and second level signals on the communication bus to establish separate data and power supply connections, eliminating the need for inductance and allowing simultaneous power supply and data transmission without interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If inductors are used to block AC signals during data interaction, then DC power supply can be separated from data transmission, but the volume of the controller increases and driving ability decreases

Engineering Contradiction:

Improvepower supply separationVSAvoidcontroller volume

Core Design Contradiction:

ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent extracts the inductor component from the communication circuit by implementing complete electrical isolation between power and data lines. Power supply and data transmission occur through separate physical paths without requiring inductors, thereby eliminating the volume increase while maintaining reliable power separation.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The communication bus is designed to handle both power supply and data transmission functions simultaneously through different signal lines. The system achieves multi-functionality where the same bus infrastructure supports both power delivery and communication without requiring additional blocking components like inductors.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If inductors are used to block AC signals, then power and data can be transmitted separately, but the communication distance and anti-interference ability are reduced

Engineering Contradiction:

Improvepower data separationVSAvoidcommunication distance

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The patent segments the communication bus into separate functional channels: dedicated power supply lines and dedicated data transmission lines. This segmentation eliminates signal interference between power and data, allowing for extended communication distance without the need for inductors, thereby improving both reliability and communication range.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If capacitors are used to block DC power during data interaction, then data transmission is enabled, but the overall system volume increases

Engineering Contradiction:

Improvedata transmissionVSAvoidsystem volume

Core Design Contradiction:

Ease of operationVSVolume of stationary object

Solution Approach 1:

The patent removes the capacitor blocking component by implementing complete electrical isolation between power and data lines. Data transmission is enabled through the isolated data line without requiring capacitors to block DC power, thereby enabling data transmission while eliminating the volume increase associated with blocking components.

Inventive Principle:

Principle #2Taking out (Extraction)

4Adaptability or versatility

If inductors and capacitors are used for signal blocking, then power supply and data transmission can coexist on the same bus, but the manufacturing cost and device complexity increase

Engineering Contradiction:

Improvebus multi-functionalityVSAvoidcircuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the bus into separate power and data channels that are electrically isolated from each other. This segmentation enables the bus to handle both power supply and data transmission simultaneously without requiring complex blocking circuits, thereby maintaining adaptability while reducing device complexity and manufacturing cost.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The communication bus is designed with universal multi-functionality where separate lines handle different functions. Power supply lines carry electrical power while data lines carry communication signals, allowing the bus system to perform multiple functions without requiring additional blocking components, thus reducing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12088421B2Control method and control apparatus for communication device, and communication system and storage medium

Publication Date: 2024.09.10 GD MIDEA HEATING & VENTILATING EQUIP CO LTD

AI summary

The present disclosure provides a control method and a control apparatus for a communication device, a communication system, and a storage medium. The control method for a communication device includes periodically outputting, a first level signal and a second level signal to the communication bus, and the second communication device establishes a data connection with the first communication device based on that the level signal on the communication bus is the first level signal, and the second communication device establishes a power supply connection with the first communication device based on that the level signal on the communication bus is the second level signal. Since the data connection and the power supply connection do not appear at the same time, the communication bus using the above-mentioned control method does not need to set an inductance compared to the traditional Home Bus.