Air conditioner current loop communication circuit and air conditioner
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Solution Overview
Problem
Current air conditioner current loop communication circuits face high power consumption and heat generation due to voltage dividing resistors, which complicates PCB layout and is not conducive to efficient communication between indoor and outdoor units.
Innovation Solution
A switching power supply module is introduced to provide DC power to the communication loop, eliminating the need for voltage dividing resistors and using a switching transformer to output DC power, thereby reducing power consumption and simplifying the layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a voltage dividing resistor is used to provide DC power to the current loop communication circuit, then the circuit can operate with simple components, but power consumption increases and heat generation occurs
Solution Approach 1:
The patent changes the power supply mode from resistive voltage division to switching power supply, fundamentally altering the electrical parameters and power efficiency of the circuit
Solution Approach 2:
The patent replaces the passive resistive voltage division mechanism with an active switching power supply system, substituting a inefficient electrical mechanism with a more efficient controlled system
2Device complexity
If a voltage dividing resistor is used to provide DC power, then the circuit can be implemented with simple components, but heat generation becomes severe
Solution Approach 1:
The patent changes the power supply mode from resistive voltage division to switching power supply, fundamentally altering the electrical parameters and power efficiency of the circuit
Solution Approach 2:
The patent converts the harmful heat generation effect into beneficial controlled heating within the switching power supply, where energy conversion is managed efficiently rather than wasted as unwanted heat
3Device complexity
If a voltage dividing resistor is used, then the power supply circuit is simple, but the volume of the resistor is large which complicates PCB layout
Solution Approach 1:
The patent changes the power supply mode from resistive voltage division to switching power supply, fundamentally altering the electrical parameters and power efficiency of the circuit
Solution Approach 2:
The patent uses integrated switching power supply modules that can be implemented as compact printed circuit board traces and components, replacing the need for large physical resistors
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
The solution effectively reduces heat generation and power consumption, simplifies the PCB layout, and ensures reliable communication between indoor and outdoor units of the air conditioner by using a switching power supply module to provide DC power directly, enhancing the operational efficiency of the current loop communication circuit.
Implementation Method 1
using a switching transformer to output DC power
Data Source
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AI summary
The present disclosure provides an air conditioner current loop communication circuit and an air conditioner. The switching power supply module is connected in series to the communication connection S line or the AC power connection line to output the direct current to the current loop communication loop. The DC power output from the switching power supply module is configured to replace the existing resistance voltage divider type DC power supply circuit, and is compatible with the existing current loop communication circuit connecting wires between the indoor unit and outdoor unit of the air conditioner, which solves the problems that the existing current communication loop circuit of the air conditioner may generate serious heat due to the large power consumption during the operation of the voltage divider resistor, and the large volume of the voltage divider resistor is also not conducive to the PCB layout of the current loop communication circuit.