KR20050058661A - Air conditioner system of vehicle and control method thereof - Google Patents

Abstract

In the automatic mode of the vehicle air conditioning system, by automatically controlling the operation of each actuator, blower motor and compressor according to the set temperature and the input of each sensor, to maintain the optimal interior of the vehicle,

If the air conditioner system is selected as the automatic mode of the air conditioner system, when the outside temperature is above the set reference temperature, the compressor is operated at all times to control the humidity in the room, and the automatic mode is selected immediately after the winter start, and the air is discharged in the floor direction. When the coolant and the outside temperature are kept below the set reference temperature, the air volume is prevented from being discharged, and the air volume of the blower is gradually increased and adjusted as the temperature of the coolant increases, and the air conditioner is operated during the summer operation. Opening the temperature door to the maximum cooling side when the set temperature is set below the reference temperature when stopping the operation; If the operation of the air conditioning system is selected as the automatic mode immediately after the start of the summer season, if the temperature of the evaporator is above a predetermined temperature, the air volume of the blower is adjusted to low, and the step of controlling the rising step by step as the temperature of the evaporator falls.

Description

Vehicle air conditioning system and its control method {AIR CONDITIONER SYSTEM OF VEHICLE AND CONTROL METHOD THEREOF}

The present invention relates to a vehicle air conditioning system, and more particularly, to automatically control the operation of each actuator, blower motor and compressor in accordance with the set temperature and the input of each sensor in the automatic mode to maintain the optimal interior of the vehicle. It relates to a vehicle air conditioning system and a control method thereof.

In general, in order to provide a comfortable driving environment for a driver and a passenger in a vehicle, an air conditioning system including an air conditioning system that provides cooling for summer driving and a heater system for providing heating for winter driving is provided.

Such an air conditioning system is set to operate the air conditioning system only in the cooling operation condition when the operation of the air conditioning system is selected in the automatic mode.

That is, when the operation of the air conditioner system is selected as the automatic mode, the air conditioner system is not operated at the reference temperature set to the operating comfort temperature of the vehicle, for example, 23 to 25 ° C. Since it is not possible, a comfortable indoor atmosphere is not created.

In addition, there is a disadvantage in that moisture is not formed in the glass as the function of the moisture removal is not performed, thereby ensuring a stable watch for the driver and passengers.

In addition, when the predetermined reference temperature or more is reached, there is a disadvantage in that the comfort is not accompanied by a stable operation control by the temperature difference between the operation of the air conditioning system and the non-operation.

In addition, since the function of controlling the air volume and the discharge door according to the cooling water temperature is not applied, the cold wind is discharged in a state in which the cooling water temperature is not sufficiently heated in the winter operation, thereby degrading the comfort.

In addition, when operating the air conditioner system during summer operation and suspending the operation of the air conditioner system in consideration of the load and other conditions during the operation, the discharge door is fixed to the current position, causing hot wind to be discharged into the room, causing discomfort. There are disadvantages.

In addition, there is a problem that hot wind is discharged to the driver's face strongly at the beginning of the start-up in the summer driving, causing discomfort in the driving.

In addition, since the function of compensating the real-time outdoor air temperature by recognizing the driving and stopping states of the vehicle is not applied, reliability of the air conditioning system is reduced.

The present invention has been invented to solve the above problems, the first object is to always operate the air conditioning system in the automatic mode to maintain a comfortable indoor environment through the removal of indoor moisture.

The second purpose is to maintain the comfort of the room so that the air volume is not discharged before the cooling water is sufficiently heated during the winter operation.

The third purpose is to prevent the inflow of hot wind into the room by moving the temperature door to the cooling side when the air conditioning system is stopped while the air conditioning system is in operation during the summer season.

The fourth purpose is to detect the temperature of the evaporator during summer operation and to maintain the temperature higher than the set temperature to delay the start of the air volume to prevent the hot wind is discharged immediately after the start.

The present invention for realizing the above object comprises: information detecting means for detecting the indoor and outdoor environmental conditions of the vehicle and the condition conditions of the vehicle; Control means for automatically controlling the operation of the air conditioning system according to the detected indoor and outdoor environmental conditions of the vehicle and the condition of the vehicle; Driving means for adjusting a discharge direction of air in accordance with a control signal of the control means; A blower motor for adjusting the air volume of the discharged air in accordance with the control signal of the control means; According to the control signal of the control means provides a vehicle air conditioning system comprising a compressor for compressing the refrigerant circulated in the operation of the air conditioning system.

The method may further include reading the operation selection mode of the air conditioning system to determine whether the automatic mode is selected; If the automatic mode is selected, the air conditioner is operated by automatically determining the operation of the compressor, the speed of the blower motor, the position of the temperature door, and the position of the air discharge door by reading the information of the outside temperature, the evaporator temperature, the water temperature, and the vehicle speed. It provides a control method of a vehicle air conditioning system comprising a.

In addition, determining whether the operation of the air conditioning system is selected as the air conditioning system automatic mode; If the air conditioner system is in the automatic mode, detecting the outside temperature to determine whether the set temperature is higher than the reference temperature; When the outside air temperature is less than the set reference temperature provides a control method of the vehicle air conditioning system comprising the step of removing the moisture in the cabin at all times by operating the compressor.

In addition, the process of determining whether the mode of the air conditioning system is automatically selected immediately after the winter start, and the discharge direction of the air is selected as the floor; Determining whether the temperature of the coolant is lower than or equal to the set temperature and the ambient temperature is lower than or equal to the set temperature when it is determined that the automatic mode is selected and discharge in the floor direction is performed; When the coolant and the outside temperature are below the set temperature, the discharge of the air is blocked, and the air volume of the blower is adjusted step by step as the temperature of the coolant rises as time passes, thereby preventing cold wind from being discharged to the floor direction immediately after the winter start. It provides a control method of a vehicle air conditioning system comprising a process.

In addition, determining whether the operation of the air conditioning system is selected during the operation of the air conditioning system during the summer operation; If it is determined that the air conditioning system is stopped during operation, determining whether the air temperature is lower than the reference temperature by detecting the set temperature; When the set temperature is determined to be less than the reference temperature to open the temperature door to the maximum cooling side, to provide a control method for a vehicle air conditioning system comprising the step of blocking the indoor inflow of hot air due to the operation of the air conditioning system stopped. do.

In addition, the step of determining whether the operation of the air conditioning system is selected to the automatic mode immediately after the start of the summer operation; If the operation of the air conditioner system is selected as the automatic mode, reading the temperature of the evaporator to determine whether the set temperature is equal to or higher than the set reference temperature; Maintaining the set time by setting the air flow rate of the blower motor to 'low' to prevent hot air from being discharged when the temperature of the evaporator is equal to or higher than a set reference temperature; It provides a control method of a vehicle air conditioning system comprising the step of operating the blower air flow normally when the set time elapses.

In addition, if the operation selection of the air conditioning system is the selection of the automatic mode of the air conditioning system, the process of controlling the moisture in the room at all times by operating the compressor when the outside temperature is above the set reference temperature; If the automatic mode is selected immediately after the winter start and the air is discharged in the floor direction, the air flow is prevented from being discharged when the coolant and the outside temperature are kept below the set reference temperature. Process; Opening the temperature door to the maximum cooling side when the set temperature is set below the reference temperature when the operation is stopped during the operation of the air conditioning system during the summer operation; If the operation of the air conditioning system is selected as the automatic mode immediately after the start of the summer season, if the temperature of the evaporator is above a predetermined temperature, the air volume of the blower is adjusted to low, and the step of rising control in accordance with the temperature drop of the evaporator, characterized in that it comprises A control method of a vehicle air conditioning system is provided.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen in FIG. 1, the vehicle air conditioning system according to the present invention includes a selection signal detector 10, an outside temperature detector 20, a water temperature detector 30, an evaporator temperature detector 40, and a vehicle speed detector 50. , Control unit 60, memory unit 70, blower motor 80, actuator 90, and compressor 100.

The selection signal detector 10 detects a signal for selecting an air conditioning system operation and outputs information about the signal.

That is, selection of temperature control, selection of automatic mode, selection of operation of the air conditioning system, selection of operation for the circulation of air and outdoor air, selection of the air volume, selection of the discharge door, selection of the amount of air flow into the windshield glass Detect.

The outside temperature detector 20 detects an outdoor temperature and outputs information about the outdoor temperature.

The water temperature detector 30 detects the temperature of the cooling water and outputs information about it.

The evaporator temperature detector 40 detects the temperature of the evaporator that absorbs the surrounding latent heat as the refrigerant circulates, and outputs information about the evaporator.

The vehicle speed detection unit 50 detects the current traveling vehicle speed from the rotational speed of the output shaft shaft and outputs information on it.

If it is detected from the selection signal detection unit 10 that the operation of the air conditioning system is selected as the automatic mode, the control unit 60 performs control for creating an optimal indoor environment according to the detected information.

The control unit 60 controls the temperature of the discharged air by controlling the opening angle (0 to 100%) of the temperature door according to the temperature set from the selection signal detecting unit 10 and the information of each sensor, and the temperature not shown. When the temperature is set through the switch, the control is controlled to be up / down at an interval of 0.5 ° C., the position of the temperature door is controlled according to the selection of the cooling mode and the heating mode, and the speed of the blower motor 80 is controlled step by step.

The memory unit 70 stores the general operating modes of the currently selected air conditioning system.

The blower motor 80 adjusts the speed according to the voltage control signal of the controller 60 to discharge the air volume.

The actuator 90 operates the door for determining the temperature door, the discharge door, the circulation of the inside, and the inflow of outside air according to the control signal of the controller 60.

When the operation of the air conditioner system is selected, the compressor 100 performs a function of compressing the refrigerant circulated according to the control signal of the controller 60.

The operation of the present invention with the configuration including the function as described above is executed as follows.

When the manual operation mode is selected in the air conditioning system according to the present invention, since the same or similar operation to that of the conventional air conditioning system is performed, a detailed operation thereof will be omitted and only the selection of the automatic mode will be described.

As can be seen in FIG. 2, in the state where the start of the engine is kept on, the control unit 60 reads the operation selection mode of the air conditioning system (S101), and determines whether the automatic mode is selected (S102).

When it is determined that the automatic mode is selected in the above, all state information of the vehicle such as the outside air temperature, the temperature of the cooling water, the temperature of the evaporator, and the vehicle speed is read (S103).

Subsequently, by determining whether or not the compressor is driven, the speed of the blower motor 80 and the position of the discharge door according to the general state information of the vehicle to be read out (S104), the indoor atmosphere of the vehicle is cooled or heated in a comfortable state. (S105).

If the manual mode is selected in the determination of S102, driving to the selected mode is controlled (S106).

Referring to the above description, the specific operation control according to each condition is as follows.

As can be seen in FIG. 3, in the state where the engine is kept on, the controller 60 determines whether the information read from the selection signal detection unit 10 is the operation mode of the air conditioning system to select the automatic mode. (S201) (S202).

If it is determined that the automatic mode is selected in the above determination, the temperature of the outside air is read from the outside temperature detection unit 20 (S203), and it is determined whether the detected temperature is higher than the set reference temperature, preferably 0 ° C or more (S204).

At this time, if it is determined that the outside temperature is maintained above the set reference temperature by operating the compressor 100 to always drive the air conditioning system to remove the moisture in the room to create a comfortable indoor atmosphere (S205).

In addition, as can be seen in Figure 4, in the state that the engine start is maintained on, the control unit 60 reads the signal of the selection signal detection unit 10 (S301) to select the operation mode of the air conditioning system automatic mode It is determined whether the air discharge door is selected as the blowing mode in the floor direction (S302).

In the automatic operation mode, when it is determined that discharge is selected in the floor direction, the temperature of the coolant is detected through the water temperature detector 30 to determine whether the set reference temperature, preferably 73 ° C. or less, is maintained (S303). .

If it is determined that the temperature of the cooling water is maintained below the set reference temperature, it is determined whether the detected outside temperature is maintained at the set reference temperature, preferably 10 ° C. or less (S304).

When it is determined that the outside air temperature is maintained below the set reference temperature, the blower motor 80 is stopped to prevent cold air from being blown to the passenger's foot during the initial start-up of the winter, and the air volume is prevented from being discharged. At the same time, the air volume of the blower is adjusted step by step according to the rise of the temperature of the cooling water and the change of the outside air temperature.

Speed control of the blower motor 80 is controlled according to the diagram as shown in FIG. 7 according to the condition of the outside air temperature.

For example, air volume discharge is controlled as shown in Table 1 below according to the temperature condition of the outside air.

Ambient temperature (℃) Lo operating time Auto mode Hi operation time -15 ℃ or less 8 minutes 60 seconds (1 minute) -14.5 ~ -10 ℃ 6 minutes -9.5 ~ -5 ℃ 5 minutes -4.5 ~ 5 ℃ 4 minutes 5.5 ~ 10 ℃ 2 minutes

In addition, the outside air temperature is corrected according to the vehicle speed, which is corrected according to the hysteresis curve as shown in FIG. 8.

As can be seen in the drawing, in the section of the high vehicle speed based on the set reference speed, preferably 25Km / h is increased by -1 ℃ at intervals of 1 minute, the fall is corrected by -1 ℃ at intervals of 4 seconds,

Further, in the section of the low vehicle speed on the basis of the set reference speed, preferably 15 km / h, correction is performed at -1 ° C at intervals of 4 seconds.

As shown in the control diagram shown in FIG. 9, the heating start control under the conditions of the initial start-up of the winter is, for example, such that the cooling water is discharged to the windshield glass by automatic low blowing in an area of 45 ° C. or less. In the area of 45 ° C. or higher, the discharge direction is mixed by the windshield glass and the floor direction or the front and floor directions, and discharged. In the area exceeding 50 ° C. or higher, automatic control is performed.

 In addition, as can be seen in Figure 5, in the state of operating and operating the air conditioning system in the summer to read the operation selection of the air conditioning system from the selection signal detector 10 (S401), the drive of the compressor 100 is It is determined whether a switch from on to off is detected (S402).

At this time, when the driving of the compressor 100 is detected to be switched from on to off, the current operating temperature is read (S403) to determine whether the reference temperature is set to 23 ° C. or lower, preferably in the cooling operation condition. (S404).

In the above determination, if it is determined that the set temperature is set to the reference temperature or less, the control unit 60 moves the temperature door to the maximum cooling side through the drive control of the actuator 90 (S405) to control the conditions such as load during the summer operation. In view of this, when the operation of the air conditioning system is temporarily stopped, the hot wind is blocked from being discharged to the indoor source (S406).

In addition, as can be seen in Figure 6, the mode selection of the air conditioning system immediately after the initial start of the engine during the summer operation is read (S501), it is determined whether the automatic mode is selected (S502).

When it is determined in the above that the automatic mode is selected, the temperature of the evaporator is read (S503) to determine whether the set reference temperature, preferably 30 ° C. or more, is maintained (S504).

If it is determined that the temperature of the evaporator is maintained above the set reference temperature, in order to prevent hot air from being discharged into the room at the initial stage of the operation of the air conditioning system, the blower motor 80 is started with low air flow to be set for a predetermined time, preferably. Preferably 9 seconds (S505).

Subsequently, it is determined whether the set predetermined time has elapsed (S506) and when it is determined that the set time has elapsed, the air volume startup of the blower motor 80 is normally operated to discharge the air provided with cooling to the room (S507).

Therefore, by operating the air conditioning system immediately after the initial start-up of the summer engine, it prevents hot air from being discharged.

As described above, the optimum indoor environment is always maintained according to the general conditions in the operation of the air conditioning system for the vehicle, thereby providing comfort in the operation of the vehicle.

1 is a schematic configuration diagram of a vehicle air conditioning system of the present invention.

2 is a flow diagram of one embodiment for control execution in a vehicular air conditioning system of the present invention.

3 is a flow chart of one embodiment of the control execution according to the outside temperature in the vehicle air conditioning system of the present invention.

4 is a flow chart of one embodiment of the control execution according to the water temperature and the outside temperature in the vehicle air conditioning system of the present invention.

5 is a flowchart of an embodiment of the control execution when the air conditioner is off in the vehicle air conditioning system of the present invention.

Figure 6 is a flow diagram of one embodiment of the control execution according to the temperature of the evaporator in the vehicular air conditioning system of the present invention.

7 is a discharge pool amount control diagram according to the outside air temperature in the vehicle air conditioning system according to the present invention.

8 is a vehicle speed hysteresis diagram for the outside air temperature correction in a vehicle air conditioning system according to the present invention.

9 is a control diagram for heating start control during winter start-up in the vehicle air conditioning system according to the present invention.

Claims (13)

A selection signal detector for detecting an air conditioning system operation selection; An outdoor temperature detector detecting an outdoor temperature; A water temperature detector detecting a temperature of the cooling water; An evaporator temperature detector for detecting an evaporator temperature of the air conditioning system; A vehicle speed detector for detecting a current vehicle speed; Control means for automatically controlling the operation of the air conditioning system according to the operation selection of the air conditioning system, the indoor / outdoor environment condition, the evaporator temperature, and the vehicle speed condition; Driving means for adjusting a discharge direction of air in accordance with a control signal of the control means; A blower motor for adjusting the air volume of the discharged air in accordance with the control signal of the control means; And a compressor for compressing a refrigerant circulated in the operation of the air conditioning system according to the control signal of the control means. The method of claim 1, The control means controls the temperature of the discharged air by controlling the opening angle of the temperature door according to the set temperature and the information of each sensor, and controls to be up / down at intervals of 0.5 ℃ when the room temperature is set, the cooling mode and The air conditioning system for a vehicle, characterized in that for controlling the position of the temperature door and the air flow step by step according to the selection of the heating mode. The method of claim 1, The selection signal detecting unit detects temperature selection, automatic mode selection, operation selection of an air conditioning system, operation selection for inflow of air and outdoor air, selection of air volume, selection of a discharge door, and selection of a discharge direction of air. Vehicle air conditioning system, characterized in that. Reading the operation selection mode of the air conditioning system to determine whether the automatic mode is selected; If the automatic mode is selected, the air conditioner is operated by automatically determining the operation of the compressor, the speed of the blower motor, the position of the temperature door, and the position of the air discharge door by reading the information of the outside temperature, the evaporator temperature, the water temperature, and the vehicle speed. Control method of a vehicle air conditioning system, characterized in that it comprises a. Determining whether a mode of the air conditioning system is automatically selected immediately after the winter start, and whether the discharge direction of air is selected as a floor; Determining whether the temperature of the coolant is lower than or equal to the set temperature and the ambient temperature is lower than or equal to the set temperature when it is determined that the automatic mode is selected and discharge in the floor direction is performed; When the coolant and the outside temperature are below the set temperature, the discharge of the air is blocked, and the air volume of the blower is adjusted step by step as the temperature of the coolant rises as time passes, thereby preventing cold wind from being discharged to the floor direction immediately after the winter start. Control method of a vehicle air conditioning system comprising a process. The method of claim 5, The air discharge direction is for a vehicle, characterized in that the windshield glass, the mixer in the floor direction and the windshield glass direction, the mixer in the driver's chest and floor direction and the automatic determination control of the discharge direction is performed according to the temperature condition of the cooling water. Control method of air conditioning system. The method of claim 5, The outside air temperature control method of the vehicle air conditioning system, characterized in that up / down compensation according to the hysteresis diagram on the basis of the speed set according to the vehicle speed. The method of claim 5, The compensation of the outside air temperature is increased by 1 DEG C in 1 minute intervals in the region of high vehicle speed based on the set speed, and lowered by 1 DEG C in 4 second intervals, and lowered by 1 DEG C in the interval of 4 seconds in the low vehicle speed region. A control method for a vehicle air conditioning system. Determining whether the operation of the air conditioner system is selected during the operation of the air conditioner system during summer operation; If it is determined that the air conditioning system is stopped during operation, determining whether the air temperature is lower than the reference temperature by detecting the set temperature; And if the set temperature is determined to be equal to or less than the reference temperature, opening the temperature door to the maximum cooling side to block the inflow of hot air due to the operation of the air conditioning system stopped. The method of claim 9, The reference temperature is a control method of a vehicle air conditioning system, characterized in that 23 ° C. Determining whether the operation of the air conditioning system is selected as the automatic mode immediately after the start of the summer operation; If the operation of the air conditioner system is selected as the automatic mode, reading the temperature of the evaporator to determine whether the set temperature is equal to or higher than the set reference temperature; Maintaining the set time by setting the air flow rate of the blower motor to 'low' to prevent hot air from being discharged when the temperature of the evaporator is equal to or higher than a set reference temperature; And controlling the blower air flow rate normally when the set time has elapsed. The method of claim 11, The reference temperature for the evaporator is a control method of a vehicle air conditioning system, characterized in that set to 30 ℃. If the operation selection of the air conditioning system is the selection of the automatic mode of the air conditioning system, controlling the humidity of the room by operating the compressor at all times when the outside temperature is above the set reference temperature; If the automatic mode is selected immediately after the winter start and the air is discharged in the floor direction, the air flow is prevented from being discharged when the coolant and the outside temperature are kept below the set reference temperature, and the air flow rate of the blower is gradually adjusted as the temperature of the coolant rises. Process; Opening the temperature door to the maximum cooling side when the set temperature is set below the reference temperature when the operation is stopped during the operation of the air conditioning system during the summer operation; If the operation of the air conditioning system is selected as the automatic mode immediately after the start of the summer season, if the temperature of the evaporator is above a predetermined temperature, the air volume of the blower is adjusted to low, and the step of rising control in accordance with the temperature drop of the evaporator, characterized in that it comprises Control method of a vehicle air conditioning system.