Method for controlling vehicle air- conditioning system and a compressor to which the method is applied
Disclosed is a method for controlling a vehicle air-conditioning system and a compressor to which the method for controlling a vehicle air-conditioning system is applied. The embodiments of the present disclosure may precisely sense changes in the refrigerant amount of a mechanical or an electrical compressor, thereby making it possible to stably operate the compressor.
1 . A method for controlling a vehicle air-conditioning system, the method comprising:
a first step of sensing one or more temperatures or pressures to determine a refrigerant amount state of a compressor provided in an air-conditioning system after a vehicle is turned on;
a second step for switching to a refrigerant amount determination mode after the first step;
a third step for waiting for 1 hour after the second step;
a fourth step for determining whether an evaporator provided in the air-conditioning system meets a target evaporator temperature Evap T after the third step; and
a fifth step for determining whether a predetermined target deviation temperature of an outside air temperature is met after the fourth step, wherein whether the refrigerant amount state of the compressor is normal is determined through the fourth step or the fifth step,
wherein the second step comprises:
an on-state maintaining step for maintaining the air-conditioning system in an on state while maintaining the vehicle in an idle state;
an outside air mode operating step for operating the air-conditioning system in an outside air mode;
a lowest temperature operating step for operating the air-conditioning system at a lowest temperature; and
a blower fan operating step for operating a blower fan provided in the air-conditioning system to generate a maximum amount of air flow.
2 . The method of claim 1 , wherein the first step further comprises:
an outside air temperature sensing step for sensing a temperature state of an outside air of the vehicle;
an evaporator temperature sensing step for sensing a temperature state of the evaporator; and
a duct inside temperature sensing step for sensing a temperature state of an inside of a duct positioned at an outlet side of the evaporator.
3 . The method of claim 2 , wherein the first step further comprises:
a discharge pressure sensing step for sensing a discharge pressure of the compressor.
4 . The method of claim 1 , wherein the 1 hour of the third step corresponds to a time taken for stabilizing operation of the compressor to have a refrigerant amount in a normal state.
5 . The method of claim 1 , wherein when the target evaporator temperature Evap T is lower than the outside air temperature, it is determined that a refrigerant amount is normal.
6 . The method of claim 1 , wherein in the fifth step, when a temperature value obtained by deducting the target evaporator temperature Evap T from an inside temperature of a duct Duct T positioned at an outlet side of the evaporator is maintained in a range of the target deviation temperature of the outside air temperature, it is determined that a refrigerant amount is normal.
7 . The method of claim 1 , further comprising:
determining whether a discharge pressure meets a value in a range of the discharge pressure per the outside air temperature after the fifth step.
8 . The method of claim 7 , wherein in the determining whether the discharge pressure meets the value in the range of the discharge pressure per the outside air temperature, when the discharge pressure is maintained in a range of a first target discharge pressure to a second target discharge pressure, it is determined that a refrigerant amount is normal.
9 . The method of claim 1 , wherein when the fourth to the fifth steps are both met, it is determined that a current refrigerant amount of the compressor is normal.