Air conditioning system, control system, and control method for air conditioning system expansion valve

A control system for an air conditioning system, comprising an air conditioning controller and an electronic control part configured to control an electronic expansion valve to move, the air conditioning controller is a control center of the air conditioning system and is configured to receive and parse a control signal and/or input information of a vehicle system or a control panel, and send a control signal generated from parsing to the electronic expansion valve, and the electronic expansion valve is configured to be controlled by the control signal;

• the air conditioning controller comprises a memory cell or the electronic control part comprises a memory cell, wherein the memory cell is configured to at least store detected valve opening position information of the electronic expansion valve;
• and
• the control system is configured to control a target position of the electronic expansion valve to be converted into a calibrated target position according to the valve opening position information provided by the memory cell and a current pressure differential;
• wherein
• the valve opening position information is embodied as valve opening position values of the electronic expansion valve corresponding to different set pressure differential values, and the valve opening position values and the corresponding pressure differential values are stored in the memory cell;
• the valve opening position values are detected by a position detector, and the pressure differential values are detected by a pressure detector;
• and wherein
• each of the valve opening position values is a corresponding number of steps taken by a stepping motor operating from a fully closed position until the electronic expansion valve starts to allow fluid to pass through.

A control method for an air conditioning system, comprising a control method for controlling an electronic expansion valve of the air conditioning system, wherein the control method for controlling the electronic expansion valve comprises a stage of the electronic expansion valve acquiring its own valve opening position and a stage of calibrating the valve opening position of the electronic expansion valve;

• in the stage of the electronic expansion valve acquiring its own valve opening position, the air conditioning system detects valve opening position values of the electronic expansion valve corresponding to different set pressure differential values by arranging a position detector, and detects the pressure differential values by arranging a pressure detector, and stores the valve opening position values and the corresponding pressure differential values in a memory cell;
• and
• in the stage of calibrating the valve opening position of the electronic expansion valve, the control method comprises controlling the electronic expansion valve to perform position adjustment according to valve opening position information and a current pressure differential, to adjust a target position value to a calibrated target position value;
• and wherein
• the valve opening position information is embodied as the valve opening position values of the electronic expansion valve corresponding to the pressure differential values;
• and
• each of the valve opening position values is a corresponding number of steps taken by a stepping motor operating from a fully closed position until the electronic expansion valve starts to allow fluid to pass through.