Apparatus for controlling fan motor of vehicle cooling fan and method thereof
View Patent ↗An apparatus including an air conditioner device including a condenser, an expansion valve, an evaporator, and a compressor, a cooling fan configured to cool the condenser, wherein the cooling fan includes a fan motor and a blade, a sensing unit, and a controller configured to determine whether an operating condition of the cooling fan and a flooding condition of a vehicle are satisfied based on driving information of the vehicle detected by the sensing unit and to control an operation of the fan motor of the cooling fan according to whether the vehicle is flooded.
1. An apparatus comprising:
an air conditioner device comprising a condenser, an expansion valve, an evaporator, and a compressor;
a cooling fan configured to cool the condenser, wherein the cooling fan comprises a fan motor and a blade;
a sensing unit; and
a controller configured to determine whether an operating condition of the cooling fan and a flooding condition of a vehicle are satisfied based on driving information of the vehicle detected by the sensing unit and to control an operation of the fan motor of the cooling fan according to whether the vehicle is flooded.
2. The apparatus of claim 1 , wherein the sensing unit comprises:
an air conditioner operation sensor configured to receive an input of whether the air conditioner device is operated;
a pressure sensor configured to detect a refrigerant pressure inside the condenser;
a relay sensor configured to detect whether a relay for starting the compressor is operated;
a temperature sensor configured to detect a temperature of a coolant of the vehicle; and
a speed sensor configured to detect a speed of the vehicle.
3. The apparatus of claim 2 , wherein, in response to the air conditioner operation sensor being turned on, the refrigerant pressure detected by the pressure sensor being equal to or greater than a reference pressure, the relay sensor being turned on, the temperature of the coolant detected by the temperature sensor being equal to or greater than a reference temperature, and the speed of the vehicle detected by the speed sensor being equal to or greater than a reference speed, the controller is configured to determine that the operating condition of the cooling fan is satisfied.
4. The apparatus of claim 3 , wherein the controller is configured to determine whether the vehicle is flooded based on a refrigerant pressure change rate inside the condenser detected by the pressure sensor.
5. The apparatus of claim 4 , wherein the controller is configured to:
determine that the vehicle is flooded when the refrigerant pressure change rate is less than a first reference change rate; and
determine that the vehicle is not flooded when the refrigerant pressure change rate exceeds a second reference change rate.
6. The apparatus of claim 5 , wherein, in response to the cooling fan being operated and a determination that the vehicle is flooded, the controller is configured to stop the operation of the fan motor.
7. The apparatus of claim 5 , wherein, in response to the cooling fan being operated and a determination that the vehicle is not flooded, the controller is configured to maintain the operation of the fan motor.
8. A method of controlling a fan motor of a vehicle cooling fan, the method comprising:
determining whether an operating condition of a cooling fan for cooling a condenser of an air conditioner device is satisfied based on driving information of a vehicle detected by a sensing unit;
determining whether a flooding condition of the vehicle is satisfied based on the driving information; and
controlling an operation of a fan motor of the cooling fan based on whether the cooling fan operates and whether the vehicle is flooded.
9. The method of claim 8 , further comprising determining that the cooling fan is operated based on an operation sensor of the air conditioner device being turned on, a refrigerant pressure inside the condenser being equal to or greater than a reference pressure, a relay for activating a compressor of the air conditioner device being turned on, a coolant temperature of the vehicle being equal to or greater than a reference temperature, and a speed of the vehicle being equal to or greater than a reference speed.
10. The method of claim 9 , further comprising determining whether the vehicle is flooded based on a refrigerant pressure change rate inside the condenser.
11. The method of claim 10 , further comprising:
determining that the vehicle is flooded based on the refrigerant pressure change rate exceeding a first reference change rate; and
determining that the vehicle is not flooded based on the refrigerant pressure change rate being less than a second reference change rate.
12. The method of claim 11 , further comprising, when the cooling fan is operated and it is determined that the vehicle is flooded, stopping the operation of the fan motor.
13. The method of claim 11 , further comprising, when the cooling fan is operated and it is determined that the vehicle is not flooded, maintaining the operation of the fan motor.
14. A vehicle comprising:
a cooling system comprising an engine, a radiator, a water pump, and a cooling fan, wherein the engine, the radiator, and the water pump are disposed on a cooling line;
an air conditioner device integrated in the cooling system, wherein the air conditioner device comprises a compressor, a condenser, an expansion valve, and an evaporator disposed on a refrigerant line;
a sensing unit; and
a controller configured to determine whether an operating condition of the cooling fan and a flooding condition of the vehicle are satisfied based on driving information of the vehicle detected by the sensing unit and to control an operation of a fan motor of the cooling fan based on whether the vehicle is flooded.
15. The vehicle of claim 14 , wherein the sensing unit comprises:
an air conditioner operation sensor configured to receive an input of whether the air conditioner device is operated;
a pressure sensor configured to detect a refrigerant pressure inside the condenser;
a relay sensor configured to detect whether a relay for starting the compressor is operated;
a temperature sensor configured to detect a temperature of a coolant of the vehicle; and
a speed sensor configured to detect a speed of the vehicle.
16. The vehicle of claim 15 , wherein, in response to the air conditioner operation sensor being turned on, the refrigerant pressure detected by the pressure sensor being equal to or greater than a reference pressure, the relay sensor being turned on, the temperature of the coolant detected by the temperature sensor being equal to or greater than a reference temperature, and the speed of the vehicle detected by the speed sensor being equal to or greater than a reference speed, the controller is configured to determine that the operating condition of the cooling fan is satisfied.
17. The vehicle of claim 16 , wherein the controller is configured to determine whether the vehicle is flooded based on a refrigerant pressure change rate inside the condenser detected by the pressure sensor.
18. The vehicle of claim 17 , wherein the controller is configured to:
determine that the vehicle is flooded when the refrigerant pressure change rate is less than a first reference change rate; and
determine that the vehicle is not flooded when the refrigerant pressure change rate exceeds a second reference change rate.
19. The vehicle of claim 18 , wherein, in response to the cooling fan being operated and a determination that the vehicle is flooded, the controller is configured to stop the operation of the fan motor.
20. The vehicle of claim 18 , wherein, in response to the cooling fan being operated and a determination that the vehicle is not flooded, the controller is configured to maintain the operation of the fan motor.