Application of Inverter Compressor Controller in Air Conditioning System

Release Time:

2022-06-24 10:41

Since the development and production of variable frequency air conditioners, we have continuously independently developed and improved the efficient controllers of variable frequency air conditioners, and have obtained high benefits in the fierce market competition. So let's learn about the application of variable frequency compressor controllers in air conditioning systems!

One. Introduction of Inverter Compressor Controller

The inverter compressor controller is mainly composed of three parts: remote controller; indoor controller; outdoor inverter compressor controller, the control circuit adopts a highly integrated computer chip, collects input signals such as remote control signal reception, emergency switch and temperature sensor, and compares and processes them with the currently set working mode, temperature, time and other parameters. Based on the results, the compressor runs at an appropriate frequency, fan

II. Features of inverter compressor controller

The air conditioning system is a nonlinear system with many interferences, strong coupling of parameters, many changes in working conditions and large inertia. On the one hand, it is difficult for the control system to determine the room temperature model, on the other hand, the control object varies from room to room. The fuzzy control strategy, which varies with seasons, human actions and other factors, can just avoid this drawback, and it does not depend on the accurate model of the system, it is especially suitable for complex systems (or processes) and fuzzy objects where accurate mathematical models are difficult to obtain or cannot be found at all.

The quality of China's power grid is poor, and the voltage fluctuation is about 15%. The accuracy of the detection result of the voltage detection circuit is related to the operation performance of the compressor. Therefore, the requirements for the voltage detection circuit are very high. The inverter controller adopts an isolation amplifier HCPL-7820 and an operational amplifier LM358. The inverter controller is equipped with a unique diamond switch. Constant frequency heating, constant frequency cooling and DEMO demonstration can be carried out through the switch combination.

Profile of the finger switch

By turning the dial to the appropriate position, the frequency adjustment operation and function demonstration of the air conditioner can be carried out; when there is no remote control, the operation can be shut down; when a fault occurs, the system can perform fault self-diagnosis for easy maintenance; through software adjustment, you can freely Set the required fixed frequency. The setting of the diamond switch can easily realize the above functions, which is convenient, fast and accurate. Through the diamond switch setting and remote control receiving panel indicator light, the air conditioner self-check function is activated, which is convenient for users and maintenance personnel to find out the location and cause of the fault in time and accurately, and eliminate the fault in time.

The indicator light of the remote control receiving panel can display 14 error states according to different combinations, including 9 fatal errors and 5 non-fatal errors. The inverter controller has complete protection measures and complete protection items. In particular, the power module adopts Mitsubishi devices, which are characterized by over-current and over-heat protection. When a fault occurs, the power device will be shut down immediately. At the same time, information will be released to the main chip to realize double protection. The system can take different protection measures according to the cause of the fault. During the shutdown, sound and light alarms will be carried out at the same time. Three. Block diagram of variable frequency speed regulation system

A method of forming a non-uniform width PWM waveform by comparing the magnitude of a voltage waveform (modulation wave) of a triangular wave (carrier wave) and a sine wave. A small deformation of the waveform can be obtained in this way. The amplitude of the output waveform is increased or decreased according to a change in the magnitude of the sine wave control voltage waveform, and the frequency is increased or decreased according to a change in the frequency of the sine wave control voltage waveform. The voltage waveform output by the inverter compressor controller is a pulse waveform (square wave) close to a sine wave on average, but the current becomes close to a continuous sine wave according to the inductance of the motor. In this way, the variable voltage variable frequency power supply can be obtained to control the compressor.

Four. Function Description of Inverter Compressor Controller

This function introduces the parameters of the 2P cabinet air conditioning system. When the air conditioning system changes, it can be adjusted according to the specific system.

The above introduction is the inverter compressor controller in the air conditioning system should, if you need to know more, you can contact us at any time!