Multi-split air conditioning system control method, controller, air conditioning system, and medium

A method for controlling a multi-split air conditioning system comprising:

• in response to a preset condition being met:
• determining a first degree of superheat of a target indoor unit in an air blowing mode of the multi-split air conditioning system according to a temperature characteristic value of an evaporator coil of the target indoor unit, an evaporation outlet temperature value of the target indoor unit, and an air blowing correction coefficient;
• and
• adjusting an opening degree of a throttling element of the target indoor unit according to the first degree of superheat;
• and
• in response to the preset condition being not met:
• determining a second degree of superheat of the target indoor unit according to the temperature characteristic value of the evaporator coil of the target indoor unit and the evaporation outlet temperature value of the target indoor unit;
• and
• adjusting the opening degree of the throttling element of the target indoor unit according to the second degree of superheat;
• wherein:
• the air blowing correction coefficient is related to the air blowing mode of the target indoor unit;
• the evaporation outlet temperature value is measured at a point on an outdoor unit side;
• and
• the preset condition includes that a compressor of the multi-split air conditioning system has continuously operated for longer than a first preset time, the compressor has continuously been in a stable state for longer than a second preset time, and the temperature characteristic value of the target indoor unit is less than a target evaporation temperature of the target indoor unit.

A controller comprising:

• a memory storing a computer program;
• and
• a processor configured to execute the computer program to:
• in response to a preset condition being met:
• determine a first degree of superheat of a target indoor unit in an air blowing mode of the multi-split air conditioning system according to a temperature characteristic value of an evaporator coil of the target indoor unit, an evaporation outlet temperature value of the target indoor unit, and an air blowing correction coefficient;
• and
• adjust an opening degree of a throttling element of the target indoor unit according to the first degree of superheat;
• and
• in response to the preset condition being not met:
• determine a second degree of superheat of the target indoor unit according to the temperature characteristic value of the evaporator coil of the target indoor unit and the evaporation outlet temperature value of the target indoor unit;
• and
• adjust the opening degree of the throttling element of the target indoor unit according to the second degree of superheat;
• wherein:
• the air blowing correction coefficient is related to the air blowing mode of the target indoor unit;
• the evaporation outlet temperature value is measured at a point on an outdoor unit side;
• and
• the preset condition includes that a compressor of the multi-split air conditioning system has continuously operated for longer than a first preset time, the compressor has continuously been in a stable state for longer than a second preset time, and the temperature characteristic value of the target indoor unit is less than a target evaporation temperature of the target indoor unit.

A multi-split air conditioning system comprising:

• a target indoor unit;
• and
• a controller including a memory storing a computer program, and a processor configured to execute the computer program to:
• in response to a preset condition being met:
• determine a first degree of superheat of the target indoor unit in an air blowing mode according to a temperature characteristic value of an evaporator coil of the target indoor unit, an evaporation outlet temperature value of the target indoor unit, and an air blowing correction coefficient;
• and
• adjust an opening degree of a throttling element of the target indoor unit according to the first degree of superheat;
• and
• in response to the preset condition being not met:
• determine a second degree of superheat of the target indoor unit according to the temperature characteristic value of the evaporator coil of the target indoor unit and the evaporation outlet temperature value of the target indoor unit;
• and
• adjust the opening degree of the throttling element of the target indoor unit according to the second degree of superheat;
• wherein:
• the air blowing correction coefficient is related to the air blowing mode of the target indoor unit;
• the evaporation outlet temperature value is measured at a point on an outdoor unit side;
• and
• the preset condition includes that a compressor of the multi-split air conditioning system has continuously operated for longer than a first preset time, the compressor has continuously been in a stable state for longer than a second preset time, and the temperature characteristic value of the target indoor unit is less than a target evaporation temperature of the target indoor unit.