Electronic expansion valve controller for Daikin Midea Haier air conditioning

The universal controller of the electronic expansion valve of the air conditioner has intelligent identification of the cooling and heating modes.Intelligent control of superheat of refrigeration and heating.Automatic judgment of the switch-on status and defrosting status of the air-conditioning unit.The motherboard adopts the optimized design of strong and weak current separation, integrated switching power supply, built-in intelligent electronic expansion valve driver, and four-way real-time temperature detection.

A variety of protection switch outputs (exhaust temperature is too high protection, temperature sensor fault protection) can be connected with the main control of the air conditioner to achieve linkage protection.Specially designed spray cooling control function, overheating and low protection function.Improve the effective working range of the compressor, fully protect the compressor, and extend the service life.

Imported Fujitsu high-speed embedded driver chip is used, with unique automatic half-flow and offline functions, which can protect the expansion valve coil and extend the service life of the electronic expansion valve.The advanced self-positioning technology of the valve body opening degree ensures more accurate control of the electronic expansion valve and avoids the imbalance and over-adjustment failure of the electronic expansion valve of the air conditioner.

The controller can set a variety of working modes: manual mode, automatic control mode, external analog signal control, RS485 remote control.

Manual mode; no need to install a temperature sensor, manual adjustment has a 1-step fine adjustment function, and the opening of the electronic expansion valve can be adjusted arbitrarily. It can be used as a manual valve regulator during air conditioning assembly and maintenance.

Automatic control mode; the electronic expansion valve of the air conditioner can be adjusted independently and automatically.Ensure that the air-conditioning unit is always running in an energy-efficient state.When the drive circuit of the electronic expansion valve of the original controller of the air-conditioning unit fails, the opening of the electronic expansion valve can be adjusted independently, so that the air-conditioning unit can immediately resume normal operation.

External analog signal control; compatible with a variety of signal types 0-5V, 0-10V, 4-20mA.

RS485 remote control; adopts fully open modbus-RTU communication protocol, with fieldbus control function.

The controller can be widely used in various types of air conditioners, low-temperature cold storage, air energy, high-temperature heat pump drying and other hvac equipment.It is a new generation of general control modules for air conditioning assembly, air conditioning maintenance, and electronic expansion valves.

Can control the maximum number of pulse steps from 0-3000, DC12V five-wire and six-wire, various specifications of electronic expansion valves, compatible with fixed-frequency air conditioners, frequency-conversion air conditioners, air energy heat pumps, low-temperature cold storage and other HVAC equipment.

Universal variety of refrigerant types: R12, R22, R134a, R410, R407C, R404A, R600A, R507C

26 key parameters can be set openly.

The advanced self-correcting PID control algorithm based on BP neural network is used to solve the technical problems of large hysteresis and non-linearity in overheating control. Multiple protections, real-time regulation, rapid response, and stable and efficient operation of the unit.

Specially designed to protect from overheating and low temperature, to protect the compressor in all directions.