KR20090112836A - Method for controlling of air-conditioner in the vehicle - Google Patents

Abstract

PURPOSE: A method for controlling an air-conditioner in a vehicle is provided to keep the interior temperature obtained through an interior air mode constant by interior temperature compensation. CONSTITUTION: A method for controlling an air-conditioner in a vehicle is as follows. An interior air mode is converted into an exterior air mode(S200). It is determined whether the interior temperature or exterior air temperature corresponds to a compensation condition(S500). The opening degree of a temperature control door is varied for a designated time if the interior temperature or exterior air temperature corresponds to the compensation condition(S600). The air volume of a blower is increased and then returned to the original state.

Description

Method for controlling air conditioner for the vehicle

The present invention relates to a control method of an air conditioner for a vehicle, and more particularly, the outdoor air is maintained in a betting mode for a predetermined time for initial cooling and heating in a state where the vehicle is left for a long time in a high summer outside temperature or a winter outside a low outside temperature. When the air conditioning control is switched to the mode, the control method of the vehicle air conditioner to create a comfortable indoor air conditioning environment by performing the indoor temperature compensation control to maintain the indoor temperature formed under the betting mode more consistently It is about.

In general, the air conditioner of a vehicle calculates various indoor / outdoor information detected by various sensors and inputs it by a control unit for driving when selecting an automatic air conditioning mode. By controlling the driving voltage of the doors of the vents, the air conditioning mode is automatically controlled for inflow / outflow, air volume, temperature, and wind direction.

The control unit includes, for example, an analog signal such as indoor temperature information detected by the in-vehicle temperature sensor, in-vehicle temperature information detected by the in-vehicle temperature sensor, insolation information detected by the insolation sensor, and in-vehicle humidity information detected by the humidity sensor. Is converted into a digital signal by the A / D converter and input, while driving voltages of various doors such as temperature control doors and blower motors are also input.

The control unit performs feedback output control of the air volume control voltage, the internal / external air position voltage, the temperature control position voltage, and the wind direction position voltage according to the input signals so that the doors of the blower motor, the internal / external air switching door, the temperature control door, and the vents are appropriate. By controlling the voltages outputted to these driving units so as to operate properly, the air conditioning mode is automatically performed according to the vehicle indoor / outdoor environment.

On the other hand, in the air conditioner of the vehicle as described above, when the vehicle is run in a state in which the vehicle is left for a long time in an environment where the outside air temperature is high in summer, the control is performed when the air conditioner is set to be automatically controlled by a driver or a passenger The unit controls the actuator which drives the internal / external air switching door for the initial cooling of the startup so that the betting mode is performed so that the cold air in the car can be circulated only indoors.

Then, when the control unit is determined to be sufficiently cooled by the temperature of the vehicle interior gradually detected by the in-vehicle temperature sensor, the actuator to drive the indoor and outdoor air switching door so that fresh air is introduced for ventilation after approximately 20 minutes have elapsed. To control the outside air mode.

However, when the air conditioning control is performed when the vehicle is driven or stopped while the vehicle is left for a long time in an environment where the outside air temperature is high in summer, the temperature is discharged to the room due to the external hot air flowing into the vehicle interior. The line "B" is raised at the time indicated by the circle as shown in Fig. 7, and as a result, the vehicle room temperature (line "A") is raised at the time indicated by the circle at the moment. As a result, a comfortable control time for increasing the indoor air conditioning environment is increased as the vehicle indoor temperature increases.

When the vehicle is left for a long time in an environment where the outside air temperature is low in winter, when the air conditioner is set to be automatically controlled by a driver or a passenger, the control unit switches internal / external air for cooling the initial startup. The actuator that drives the door is controlled to perform the betting mode so that the warmth of the vehicle interior is circulated only indoors.

Then, the control unit, if the temperature inside the vehicle detected by the temperature sensor in the car gradually increases and is determined to be sufficiently heated, by controlling the actuator for driving the outdoor and outdoor air switching door so that fresh air is introduced for ventilation. Allow the mode to be performed.

However, when the vehicle is operated in a state in which the vehicle is left for a long time in a low outside air temperature during winter, when the air conditioning control is performed as described above, the temperature discharged into the room is temporarily lowered due to the external cold air flowing into the vehicle interior. As a result, the indoor temperature of the vehicle drops instantaneously. This causes a problem that the comfort control time for increasing the indoor air conditioning environment is increased as the vehicle indoor temperature decreases.

The present invention has been made to solve the above problems, while the vehicle is left for a long time in the summer or high temperature outside air temperature is low outside temperature in the bet mode for the initial cooling and heating to switch to the outside mode To provide a control method of the air conditioner for the vehicle to implement a room temperature compensation control to maintain a more constant indoor temperature formed under the bet mode when the air conditioning control as possible, to create a comfortable indoor air conditioning environment The purpose.

The present invention for achieving the above object is, for cooling or heating, the internal and external air conversion door to be set to be in the bet mode or the outside air mode; A temperature control door for adjusting an opening amount of a heater core side passage through which an internal or external air passes through an evaporator and a bypass passage bypassing the heater core; In the control method of the vehicle air conditioner for controlling the blower to increase the blowing amount of the air or the outside air, after the switch from the bet mode to the outside air mode, determining the compensation condition to determine whether the room temperature or the outside temperature is the compensation condition Steps; In the case where the indoor temperature or the outdoor temperature is a compensation condition, the step of varying the opening amount of the temperature control door for a predetermined time, and the indoor temperature compensation step of increasing the air flow rate of the blower to return to the original state It features.

According to the control method of the vehicle air conditioner according to the present invention, the vehicle is left in the bet mode for a predetermined time for the initial cooling and heating in a state in which the vehicle is left for a long time in the summer or high winter outside temperature low temperature is switched to the outside air mode When performing the air conditioning control, it is possible to create a comfortable indoor air conditioning environment by performing a room temperature compensation control to maintain the room temperature formed under the betting mode more consistently.

Hereinafter, a preferred embodiment of a control method of a vehicle air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the configuration of a vehicle air conditioner for performing the control method of the present invention, Figure 2 is a block diagram showing an example of an operation unit installed in the instrument panel for performing the control method of the present invention, Figure 3 is a flow chart illustrating a control method in a cooling mode of a vehicle air conditioner according to the present invention, Figure 4 is a graph for controlling the temperature control door and the blower according to the control method in the cooling mode of the present invention, Figure 5 6 is a flowchart illustrating a control method in a heating mode of a vehicle air conditioner according to the present invention, and FIG. 6 is a graph for controlling a temperature control door and a blower according to the control method in a heating mode of the present invention.

The vehicle air conditioner according to the present invention is configured to automatically perform the air conditioning mode of the air conditioner by inputting and processing various internal / external air information from the various sensors inside / outside the vehicle to the control unit 100. The air conditioning mode is also performed by operating various buttons of the operation unit 200 installed in the instrument panel of the vehicle interior.

The air conditioner includes an air conditioner case 500 having a defrost vent 510, a face vent 520, and a foot vent 530 whose openings are adjusted at doors by doors 510 d, 420 d, and 530 d, respectively. ; It is connected to the inlet 550 of the air conditioning case 500, and the air inlet 610 and the air inlet 620, the opening degree of which is controlled by the internal and external air conversion door 630 is installed on the blower motor 650 A blower 600 for blowing inside or outside air into the air conditioning case 500 by the blowing fan 640 rotated by the blowing fan 640; The bypass of the heater core 710 and the heater core 710 through which the inside or outside air passes through the evaporator 700 and the heater core 710 are provided with a temperature control door 540 for adjusting the amount of opening of the bypass barrel.

The evaporator 700 is connected to the compressor 720 in a pipeline, the compressor 720 is connected to the condenser 730, the condenser 730 is connected to the receiver dryer 740, the receiver dryer 740 is an evaporator The cooling cycle is configured by being connected to the expansion valve 750 is connected to (700). In addition, the heater core 710 is connected to the engine 800 is configured a heating cycle.

Therefore, in the cooling mode, the inside or outside air blown by the blower 600 is exchanged with the refrigerant flowing through the evaporator 700 while passing through the evaporator 700, and is discharged to the inside of the vehicle through the open vents, which are changed to cold. As a result, the cooling of the vehicle interior is performed, and the blower air is exchanged with the coolant flowing in the heater core 710 while passing through the evaporator 700 and the heater core 710 to be heated to the car interior through the open vents. By discharging, heating of the vehicle interior may be performed.

The control unit 100 directly outputs the doors 510d, 520d, and 530d of the internal / external air switching door 630, the blower motor 650, the temperature control door 540, and the doors 510d, 520d, and 530 of each vent. By controlling the voltage, the air conditioner mode pattern for internal / external air inflow, air volume, temperature, and wind direction is controlled, and the drive of the compressor 720 is intermittently controlled by intermittently controlling the driving of the electromagnetic clutch 722 of the compressor 720. do.

On the other hand, the operation unit 200 is installed in the instrument panel air conditioning operation button 210, wind direction selection button 220, outside temperature display button 230, automatic temperature control button 240, automatic temperature control stop button 250 , Air volume control button 260, front windshield removal button 270, rear windshield heating button 280, temperature setting button 290, interior / exterior air selection button 300, harmful gas blocking button 310 and The display panel 320 is provided.

The air conditioner operation button 210 functions to operate the air conditioner during the on operation and to stop the air conditioner operation during the off operation. The wind direction selection button 220 is selected by selecting various cooling and heating modes such as a defrost mode in which air is discharged toward the windshield, a foot mode in which air is discharged toward the car floor, and a vent mode in which air is discharged toward the upper half of the vehicle interior. The openings of the vents 510, 520, and 530 are adjusted to correspond to the heating and cooling mode. The outside temperature display button 230 functions to display the temperature of the outside air on the display panel 320.

The thermostat button 240 functions to automatically perform the air conditioning mode by the control unit (100). The automatic temperature control stop button 250 serves to stop the automatic control of the air conditioning mode. The air volume control button 260 functions to control the air volume by adjusting the rotational speed of the blower motor 650.

The windshield window removal button 270 operates the defrost door 510d to open the defrost vent 510 to remove frost caught on the windshield by indoor discharge air. Rear window window heating button 280 functions to remove the frost on the rear window by heating the heating wire installed in the rear window.

The temperature setting button 290 controls the temperature of the indoor discharge air by operating the temperature control door 540 to adjust the opening degree of the ventilation passage toward the heater core 710. The inside / outdoor air selection button 300 operates the switching door 630 to open the inside air inlet 610 or the outside air inlet 620 so as to blow air in the inside air circulation mode or the outside air mode.

Hazardous gas shut-off button 310 is switched doors to automatically bet circulation mode is made when the external harmful air is introduced through the harmful gas detection sensor 460 (see Fig. 1) installed in the front of the vehicle 630 to operate. The display panel 320 displays a current air conditioning mode pattern state.

Next, a control method in the cooling mode of the present invention performed by the vehicle air conditioner configured as described above will be described with reference to FIG. 3.

After starting the vehicle in the summer when the outside temperature is high, as shown in FIG. 2, the driver or the passenger selects the thermostat button 240, and then sets or changes the desired cooling temperature using the temperature setting button 290. When the cooling temperature is set, the control unit 100 performs automatic air conditioning control. (S100)

Subsequently, the control unit 100 drives the actuator for driving the internal / external air switching door 630 to allow the external air intake 620 to be closed and to open the internal air intake 610 to switch to the bet mode. (S200)

Next, the control unit 100 determines whether the switching condition from the bet mode to the outside air mode (S300).

As a switching condition from the bet mode to the outside air mode performed in step (S300) of the present invention, when the room temperature detected by the in-vehicle temperature sensor 410 reaches the set temperature manually set by the user, the in-vehicle temperature sensor When the indoor temperature detected at 410 reaches an arbitrary reference temperature that may create a cooling environment of a comfortable vehicle interior instead of the temperature manually set by the user, the outdoor temperature detected by the vehicle temperature sensor 420. It is a case where at least one of the time when the temperature falls below a certain reference temperature, the time when the amount of insolation detected by the solar radiation sensor falls below the reference value, and the time elapsed for a predetermined time in the bet mode state is satisfied.

As a result of the determination in step S300, if it is determined that the condition is a switching condition from the bet mode to the outside air mode, the control unit 100 drives and controls the actuator for driving the indoor / outdoor air conversion door 630 for indoor ventilation. The inlet 620 is opened, and the air inlet 610 is closed, thereby switching to the external air mode. (S400)

In this case, when the time elapsed from the bet mode to the bet mode is used as the switching condition from the bet mode to the bet mode in step S300, after a certain time has elapsed in the bet mode state, e.g., 20 minutes have elapsed. It is preferable to control the switching to. However, when 20 minutes have elapsed in the bet mode, the vehicle interior can be sufficiently cooled to be in a comfortable state.

When the step (S400) proceeds as described above, the outside hot air is introduced into the room through the outside air inlet 620, the temperature discharged into the room at the moment is increased, and as a result the room temperature rises.

At this time, the control unit 100 determines whether the current room temperature or the outside air temperature is a compensation condition as in step S500.

That is, when the outdoor temperature detected by the vehicle temperature sensor 420 is higher than the room temperature detected by the vehicle temperature sensor 410, for example, the indoor temperature is less than 30 ° C. and the outdoor temperature is 30 ° C. In the above case, the opening degree of the temperature control door 540 is changed while maintaining the outdoor air mode, and the air volume of the blower is increased, and then the indoor temperature compensation step of returning to the original state is performed.

More specifically, by controlling the drive of an actuator such as a motor that drives the temperature control door 540, the temperature control door 540 is the front of the heater core 710 as shown in Figs. The opening amount is controlled to be blocked to the side (or the side where the maximum cooling is possible) so as to become more cooled. That is, the opening degree of the temperature control door 540 which is the conventional control method shown in FIG. 4 (a) is not made constant like the "I" line, but the temperature control door 540 of the temperature control door 540 so as to be an appropriate cooling position. Increase the opening amount.

That is, in the step S600, the present invention variably increases the opening amount of the temperature control door 540 toward an appropriate cooling state, and then, during the L section from the time point of α seconds (for example, 30 seconds), which is a predetermined time. After returning linearly, it is controlled to return to the original state (I line).

Then, the blower motor 650 is driven as in the present invention shown in FIG. 4B without driving control of the blower motor 650 at the same voltage as the "II" line of the conventional control method shown in FIG. Increase the voltage so that the air volume increases.

That is, in the step S600, the present invention linearly returns the voltage for driving the blower during the M section from the time elapsed β seconds (for example, 20 seconds), which is a predetermined time, after increasing the air volume of the blower to a set value. After that, control to return to the original state (line II).

On the other hand, the elapsed time (α seconds) from the increase in the opening amount of the temperature control door 540 according to the present invention before the return is equal to or greater than the elapsed time (β sec) from the increase of the air volume of the blower to the return. Can be set.

By doing so, as shown in the determination at step S500, the indoor temperature is formed under the betting mode when the vehicle is driven in a state in which the outdoor temperature is higher than the current indoor temperature, that is, the vehicle is left for a long time in an environment where the outside air temperature is high in summer. Since the temperature can be maintained for a certain time, the temperature discharged to the room is instantaneously increased due to the external hot air flowing into the vehicle interior as in the prior art, and as a result, the indoor air conditioning environment is made comfortable as the vehicle indoor temperature increases. The control can be controlled so as to increase the comfortable control time.

On the other hand, according to the present invention, when the vehicle is left for a long time in the summer when the outside air temperature is high, not only the control when performing the initial cooling but also the initial heating in the state where the vehicle is left for the long time during the winter season when the outside air temperature is low. The indoor temperature compensation control may be performed to continuously maintain the indoor temperature formed in the bet mode more consistently, thereby creating a pleasant indoor air conditioning environment, which will be described with reference to FIGS. 5 and 6.

After the vehicle is started in the winter when the outside temperature is low, as shown in FIG. 2, the driver or the passenger selects the thermostat button 240 and then sets or uses the temperature setting button 290 to set the desired heating temperature. When the heating temperature is set, the control unit 100 performs automatic air conditioning control. (S100)

Subsequently, the control unit 100 drives the actuator for driving the internal / external air switching door 630 to allow the external air intake 620 to be closed and to open the internal air intake 610 to switch to the bet mode. (S200)

Next, the control unit 100 determines whether the switching condition from the bet mode to the outside air mode (S300).

As a switching condition from the bet mode to the outside air mode performed in step (S300) of the present invention, when the room temperature detected by the in-vehicle temperature sensor 410 reaches the set temperature manually set by the user, the in-vehicle temperature sensor At the time when the indoor temperature detected at 410 reaches an arbitrary reference temperature that can create a comfortable heating environment of the vehicle interior, not the temperature manually set by the user, the outdoor temperature detected by the vehicle temperature sensor 420 It is a case where at least one of the time when the temperature falls below a certain reference temperature, the time when the solar radiation amount detected by the solar radiation sensor falls below the reference value, and the time elapsed for a predetermined time in the bet mode state is satisfied.

As a result of the determination in step S300, if it is determined that the condition is a switching condition from the bet mode to the outside air mode, the control unit 100 drives and controls the actuator for driving the indoor / outdoor air conversion door 630 for indoor ventilation. The inlet 620 is opened, and the air inlet 610 is closed, thereby switching to the external air mode. (S400)

In this case, when the time elapsed from the bet mode to the bet mode is used as the switching condition from the bet mode to the bet mode in step S300, after a certain time has elapsed in the bet mode state, e.g., 20 minutes have elapsed. It is preferable to control to switch to, but when 20 minutes have elapsed normally in the bet mode state, the vehicle interior can be sufficiently heated to be in a comfortable state.

When the step (S400) proceeds as described above, the outside hot air is introduced into the room through the outside air inlet 620, the temperature discharged to the room instantaneously decreases, as a result the room temperature is lowered.

At this time, the control unit 100 determines whether the current room temperature or the outside air temperature is a compensation condition as in step S500.

That is, when the outdoor temperature detected by the vehicle temperature sensor 420 is lower than the room temperature detected by the vehicle temperature sensor 410, the opening degree of the temperature control door 540 is varied while maintaining the outdoor mode. In addition, after increasing the air volume of the blower, and proceeds to the room temperature compensation step to return to the original state (S600).

More specifically, by controlling the drive of an actuator such as a motor for driving the temperature control door 540, the temperature control door 540 bypasses the heater core 710 as shown in Figure 1 and 6 (a). The opening degree is controlled by driving to the bypass passage side (or the side where the maximum heating is possible) which passes, and to become a heating state more. That is, the opening degree of the temperature control door 540 which is the conventional control method shown in FIG. 6 (a) is not made constant like the "I" line, but the temperature control door 540 of the temperature control door 540 so as to be an appropriate heating position as in the present invention. Increase the opening amount.

That is, the present invention, in step S600, after varying the amount of opening of the temperature control door 540 to the appropriate heating state to the appropriate heating state, after a certain period of time γ seconds (for example 30 seconds) from the time point L section After returning linearly, it is controlled to return to the original state (I line).

Then, the blower motor 650 is driven as in the present invention shown in FIG. 6B without driving control of the blower motor 650 at the same voltage as the "II" line, which is the conventional control method shown in FIG. Increase the voltage so that the air volume increases.

That is, in the step (S600), the present invention linearly returns the voltage for driving the blower during the M section from the time elapsed δ seconds (for example, 20 seconds), which is a predetermined time, after increasing the air volume of the blower to a set value. After that, control to return to the original state (line II).

On the other hand, the elapsed time (γ seconds) before returning after varying the opening amount of the temperature control door 540 according to the present invention is equal to or greater than the elapsed time (δ seconds) after increasing the air volume of the blower before returning. Can be set.

By doing so, as shown in the determination at step S500, the indoor temperature formed under the betting mode when the vehicle is driven in a state in which the outdoor temperature is lower than the current indoor temperature, that is, the vehicle is left for a long time in an environment having low outside air temperature in winter. Since it can be maintained for a certain time, the temperature discharged to the room is instantaneously lowered due to the external cold air flowing into the vehicle interior as in the prior art, and as a result, the indoor air conditioning environment is comfortable as the vehicle indoor temperature decreases. The control can be controlled so as to increase the comfortable control time.

1 is a view showing the configuration of a vehicle air conditioner for performing the control method of the present invention.

2 is a configuration diagram showing an example of an operation unit installed in the instrument panel to perform the control method of the present invention.

3 is a flowchart illustrating a control method in a cooling mode of a vehicle air conditioner according to the present invention;

Figure 4 is a graph for controlling the temperature control door and the blower according to the control method in the cooling mode of the present invention.

5 is a flowchart illustrating a control method in heating mode of a vehicle air conditioner according to the present invention;

6 is a graph for controlling the temperature control door and the blower according to the control method in the heating mode of the present invention.

Figure 7 is a graph showing the measurement of the change in the room temperature and discharge temperature when switching from the bet mode to the outside mode in the control method of the prior art.

<Description of the symbols for the main parts of the drawings>

410: In-vehicle temperature sensor 420: In-vehicle temperature sensor

540: temperature control door 630: internal and external air conversion door

650: blower motor 640: blower fan

Claims (8)

Internal and external air switching doors configured to be in a betting mode or an outside air mode for cooling or heating; A temperature control door for adjusting an opening amount of a heater core side passage through which an internal or external air passes through an evaporator and a bypass passage bypassing the heater core; In the control method of the vehicle air conditioner for controlling the blower for increasing the blowing amount of the inside or outside air, A compensation condition determination step of determining whether the indoor temperature or the outside temperature corresponds to the compensation condition after the change from the bet mode to the outside air mode; In the case where the indoor temperature or the outdoor temperature is a compensation condition, the step of varying the opening amount of the temperature control door for a predetermined time, and the indoor temperature compensation step of increasing the air flow rate of the blower to return to the original state Control method of a vehicle air conditioner characterized in that. The method of claim 1, And determining whether the switching condition is from the bet mode to the outside air mode. The method of claim 2, Determining whether the transition mode from the bet mode to the outside air mode, And controlling to switch to the outside air mode after a predetermined time has elapsed in the bet mode state. The method of claim 1, And controlling the opening degree of the temperature control door so that the opening degree of the temperature control door is changed to return to the original state after a predetermined time elapses. The method of claim 4, wherein And controlling the opening degree of the temperature control door to be linearly returned to its original state. Car air conditioner The method according to claim 1 or 4, And controlling the air volume of the blower so that the air volume of the blower is returned to its original state after a predetermined time elapses after increasing the air volume of the blower to a set value. The method of claim 6, And controlling the air volume of the blower to be linearly returned to its original state. The method of claim 6, Control of the air conditioner for a vehicle, characterized in that the elapsed time before the return after the variable increase the opening amount of the temperature control door 540 is set equal to or greater than the elapsed time before the return after increasing the air volume of the blower. Way.

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