Control method, control device and air conditioning system

Abstract

A control method includes determining that refrigerant leakage occurs in an air conditioning system and controlling an actuator to perform a routine protection operation. The control method further includes controlling the actuator to perform a backup protection operation in response to determining that an abnormality occurs in the routine protection operation.

1 . A control method comprising:
 determining that refrigerant leakage occurs in an air conditioning system, and controlling an actuator to perform a routine protection operation; and   controlling the actuator to perform a backup protection operation in response to an abnormality occurring in the routine protection operation.   
     
     
         2 . The control method according to  claim 1 , wherein:
 the actuator includes:
 a refrigerant circulation loop; and 
 a refrigerant discharge flow path configured to be opened and closed, a first end of the refrigerant discharge flow path being communicated with the refrigerant circulation loop and a second end of the refrigerant discharge flow path being communicated with an outdoor environment; and 
   controlling the actuator to perform the backup protection operation includes:
 opening the refrigerant discharge flow path to discharge refrigerant in the refrigerant circulation loop to the outdoor environment. 
   
     
     
         3 . The control method according to  claim 2 , wherein:
 the refrigerant discharge flow path is provided with an electronic control valve configured to control opening and closing of the refrigerant discharge flow path; and   opening the refrigerant discharge flow path includes opening the electronic control valve to open the refrigerant discharge flow path.   
     
     
         4 . The control method according to  claim 2 , wherein:
 the refrigerant discharge flow path is provided with a thermal fuse configured to block the refrigerant discharge flow path; and   opening the refrigerant discharge flow path includes controlling the thermal fuse to be thermally fused and disconnected so as to open the refrigerant discharge flow path.   
     
     
         5 . The control method according to  claim 2 , wherein:
 the actuator further includes a power module; and   controlling the actuator to perform the backup protection operation further includes:
 controlling the power module to be powered off in response to a power-off condition being satisfied after the refrigerant discharge flow path is opened. 
   
     
     
         6 . The control method according to  claim 5 , wherein the power-off condition includes that a pressure of the refrigerant circulation loop is decreased to be within a set range. 
     
     
         7 . The control method according to  claim 2 , wherein:
 the refrigerant circulation loop includes a compressor, a high-pressure side pipeline connected to a discharge port of the compressor, a low-pressure side pipeline connected to an intake port of the compressor, and an electronic control valve disposed in the high-pressure side pipeline;   the refrigerant discharge flow path is connected to the high-pressure side pipeline, and the refrigerant discharge flow path is provided with a normally closed pressure switch; and   opening the refrigerant discharge flow path includes closing the electronic control valve and controlling the compressor to operate so as to increase a pressure of the high-pressure side pipeline to open the pressure switch.   
     
     
         8 . The control method according to  claim 7 , wherein:
 controlling the actuator to perform the backup protection operation further includes:
 determining, before opening the refrigerant discharge flow path, whether the refrigerant circulation loop is operating in a cooling mode; and 
   opening the refrigerant discharge flow path includes:
 in response to the refrigerant circulation loop operating in the cooling mode, opening the refrigerant discharge flow path; and 
 in response to the refrigerant circulation loop not operating in the cooling mode, controlling the refrigerant circulation loop to switch to the cooling mode first, and then opening the refrigerant discharge flow path. 
   
     
     
         9 . The control method according to  claim 7 , wherein:
 the actuator further includes a power module; and   controlling the actuator to perform the backup protection operation further includes:
 controlling the compressor to shut down and controlling the power module to be powered off in response to a power-off condition being satisfied after the refrigerant discharge flow path is opened. 
   
     
     
         10 . The control method according to  claim 9 , wherein the power-off condition includes that a pressure of the refrigerant circulation loop is decreased to be within a set range. 
     
     
         11 . The control method according to  claim 1 , wherein:
 the actuator includes a refrigerant circulation loop including an outdoor-side flow path and an indoor-side flow path connected to each other by pipelines; and   controlling the actuator to perform the backup protection operation includes recycling refrigerant in the indoor-side flow path to the outdoor-side flow path.   
     
     
         12 . The control method according to  claim 11 , wherein:
 the indoor-side flow path includes an indoor heat exchanger;   the outdoor-side flow path includes a compressor, an outdoor heat exchanger, a first electronic control valve, a second electronic control valve, and the compressor;   the outdoor heat exchanger, the first electronic control valve, the indoor heat exchanger, and the second electronic control valve are sequentially connected by pipelines;   recycling refrigerant in the indoor-side flow path to the outdoor-side flow path includes:
 closing the first electronic control valve and controlling the compressor to operate in response to the refrigerant circulation loop operating in a cooling mode; and 
 closing the second electronic control valve and the compressor in response to a set condition being satisfied. 
   
     
     
         13 . The control method according to  claim 12 , wherein controlling the actuator to perform the backup protection operation further includes:
 determining whether the refrigerant circulation loop is operating in the cooling mode before closing the first electronic control valve and controlling the compressor to operate; and   in response to the refrigerant circulation loop not being operating in the cooling mode, controlling the refrigerant circulation loop to switch to the cooling mode first, and then closing the first electronic control valve and controlling the compressor to operate.   
     
     
         14 . The control method according to  claim 12 , wherein the set condition includes that a pressure of the indoor-side flow path is decreased to be within a set range. 
     
     
         15 . The control method according to  claim 12 , wherein:
 the actuator further includes a power module; and   controlling the actuator to perform the backup protection operation further includes:
 controlling the power module to be powered off after the refrigerant in the indoor-side flow path is recycled to the outdoor-side flow path. 
   
     
     
         16 . The control method according to  claim 1 , wherein:
 the actuator includes a compressor and an indoor fan; and   controlling the actuator to perform the routine protection operation includes:
 controlling the compressor to be turned off and controlling the indoor fan to operate. 
   
     
     
         17 . The control method according to  claim 16 , wherein:
 the actuator further includes an electric auxiliary heating device; and   controlling the actuator to perform the routine protection operation further includes controlling the electric auxiliary heating device to be turned off.   
     
     
         18 . The control method according to  claim 16 , wherein:
 the actuator further includes a fuel gas system; and   controlling the actuator to perform the routine protection operation further includes controlling the fuel gas system to be shut down.   
     
     
         19 . A control device comprising:
 a memory storing a computer program; and   a processor configured to execute the computer program to:
 determine that refrigerant leakage occurs in an air conditioning system, and controlling an actuator to perform a routine protection operation; and 
 control the actuator to perform a backup protection operation in response to an abnormality occurring in the routine protection operation. 
   
     
     
         20 . An air conditioning system comprising:
 a control device including:
 a memory storing a computer program; and 
 a processor configured to execute the computer program to:
 determine that refrigerant leakage occurs in an air conditioning system, and controlling an actuator to perform a routine protection operation; and 
 control the actuator to perform a backup protection operation in response to an abnormality occurring in the routine protection operation.