KR101474825B1 - Method for controlling of air-conditioner in the vehicle - Google Patents

Abstract

When the air conditioning control is performed so that the vehicle is kept in the outdoor mode for a certain period of time for the initial cooling and heating in a state where the vehicle is left for a long time in a summer season in which the outdoor air temperature is high or in a winter season in which the outdoor air temperature is low, And an object of the present invention is to provide a control method of a vehicle air conditioner that can provide a comfortable indoor air conditioning environment by performing indoor temperature compensation control so as to maintain the indoor temperature more constantly.

In order to accomplish the above object, the present invention provides a refrigerator comprising: an internal / external switching door for setting an indoor mode or an outdoor mode for cooling or heating; A temperature regulating door for regulating the amount of opening of the heater core through which the air passing through the evaporator or the outside air passes and the bypass passage bypassing the heater core; A control method of a vehicle air conditioner for controlling an air blower that increases the air blowing amount of the inside air or outside air, the control method comprising the steps of: determining a compensation condition for determining whether a room temperature or outside air temperature corresponds to a compensation condition ; And a room temperature compensation step of varying the amount of opening of the temperature control door for a predetermined time when the room temperature or the outside air temperature is a compensation condition and returning the air volume of the blower to its original state after increasing the air volume .

Vehicle, air conditioning, control, indoor, temperature, compensation, temperature control door, blower

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for an air conditioner for a vehicle,

More particularly, the present invention relates to a method of controlling an air conditioner for a vehicle, and more particularly, to a method of controlling an air conditioner for a vehicle, in which a vehicle is kept in a summer period in which the outdoor air temperature is high, A control method of the air conditioner for a vehicle is provided in which a comfortable indoor air conditioning environment can be created by performing indoor temperature compensation control so as to constantly maintain the indoor temperature formed under the indoor mode more constantly .

In general, an air conditioner of an automobile calculates various indoor and outdoor information sensed and inputted from various sensors for operation when the automatic air conditioning mode is selected, and controls the inside / outside air switching door of a blower, a blower motor, And controls the driving voltage of the doors of the respective vents so as to automatically control the air conditioning mode for the inflow / outflow of air, the air volume, the temperature and the wind direction.

The control unit includes, for example, an analog signal such as room temperature information sensed by the in-vehicle temperature sensor, out-door temperature information sensed by the out-of-door temperature sensor, insolation amount information sensed by the insolation sensor, Is converted into a digital signal by an A / D converter and inputted, and also a driving voltage of an actuator such as various doors such as a temperature control door and a blower motor is also inputted.

The control unit controls the blower motor, the inside / outside air switching door, the temperature control door, and the vents according to feedback control of the air flow rate control voltage, the inside / outside air position voltage, the temperature control position voltage and the wind direction position voltage according to the input signals The air conditioning mode is automatically performed according to the indoor / outdoor environment of the automobile.

On the other hand, in the case where the automatic air-conditioning apparatus of the above-described automobile is set to perform the automatic control of the air-conditioning apparatus by the operation of the driver or the passenger at the time of driving the vehicle in a state where the vehicle is left for a long time in an environment with high outside temperature The unit controls the actuator for driving the inside / outside air switching door to perform the initial mode so that the cold air in the inside of the car can be circulated only in the room.

Then, when it is determined that the temperature of the vehicle interior detected by the in-vehicle temperature sensor gradually falls to a sufficiently cool state, the control unit controls the actuator for driving the inside / outside switching door so that fresh outside air is introduced for ventilation So that the outside air mode is performed.

However, if the above-described air conditioning control is performed at the time of traveling or stopping the vehicle while the vehicle is left in an environment with a high outside temperature in the summer for a long time, the temperature (The "A" line) is instantaneously raised at a time point indicated by the circles, as shown in Fig. As a result, there is a problem in that a comfortable control time for comforting the indoor air conditioning environment is increased as the vehicle room temperature rises.

If the air conditioner is set to be automatically controlled by a driver or an occupant when the vehicle is driven while the vehicle is left in a low ambient temperature environment in the winter, the control unit switches the inside / outside air An actuator for driving a door is controlled to perform an energizing mode so that the warmth of the inside of the car is circulated only in the room.

Then, when it is determined that the temperature of the interior of the vehicle detected by the in-vehicle temperature sensor gradually increases to be in a sufficiently heated state, the control unit controls the actuator for driving the inside / outside switching door so that fresh outside air flows for ventilation, Mode is performed.

However, if the air conditioning control is performed when the vehicle is left in an environment with a low outside temperature in winter for a long time, the temperature of the room is instantaneously lowered due to the external cold air flowing into the interior of the vehicle , So that the vehicle interior temperature is instantaneously lowered. As a result, as the vehicle room temperature is lowered, there is a problem that the comfortable control time for improving the indoor air conditioning environment is increased.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide an air conditioner in which a vehicle is left for a long period of time in a winter season in which the outdoor air temperature is high or in winter, A control method of a vehicle air conditioner is provided in which a comfortable indoor air conditioning environment can be created by performing indoor temperature compensation control so as to constantly maintain the indoor temperature formed under the indoor mode more constantly when the air conditioning control is performed The purpose.

In order to accomplish the above object, the present invention provides a refrigerator comprising: an internal / external switching door for setting an indoor mode or an outdoor mode for cooling or heating; A temperature regulating door for regulating the amount of opening of the heater core through which the air passing through the evaporator or the outside air passes and the bypass passage bypassing the heater core; A control method of a vehicle air conditioner for controlling an air blower that increases the air blowing amount of the inside air or outside air, the control method comprising the steps of: determining a compensation condition for determining whether a room temperature or outside air temperature corresponds to a compensation condition ; And a room temperature compensation step of varying the amount of opening of the temperature control door for a predetermined time when the room temperature or the outside air temperature is a compensation condition and returning the air volume of the blower to its original state after increasing the air volume .

According to the control method for a vehicle air conditioner according to the present invention, when the vehicle is left for a long time in a summer season where the outdoor air temperature is high or in winter when the outdoor air temperature is low, When performing the air conditioning control, the indoor temperature compensation control is performed so as to maintain the indoor temperature formed under the indoor mode more constantly, thereby creating a pleasant indoor air conditioning environment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a method for controlling an air conditioner for a vehicle according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a view showing a configuration of a vehicle air conditioner for carrying out a control method of the present invention, Fig. 2 is a configuration diagram showing an example of a control part installed on an instrument panel for performing a control method of the present invention, 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, and FIG. 5 is a graph for controlling the air conditioner FIG. 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. FIG. 6 is a graph illustrating a control method of the air conditioner of the present invention.

The air conditioning system for a vehicle according to the present invention is configured to automatically perform the air conditioning mode of the air conditioning apparatus by inputting various indoor / outdoor information from various sensors inside / outside the vehicle into the control unit 100 and processing. The air conditioning mode is also performed by operating various buttons of the operation unit 200 installed in the instrument panel of the automobile interior.

The air conditioner includes an air conditioner case 500 having a de-frost vent 510, a face vent 520 and a foot vent 530, the opening of which is controlled by doors 510d, 420d, and 530d, ; An indoor air inlet 610 and an outdoor air inlet 620 connected to the inlet 550 of the air conditioning case 500 and having an opening degree controlled by the indoor / outdoor switching door 630 are installed on the upper portion, A blower 600 blowing air or outside air to the inside of the air conditioner case 500 by the blowing fan 640 rotated by the blower fan 640; And a temperature control door 540 for controlling the amount of opening of the bypass passage by bypassing the heater core 710 side passage through which the inside air or the outside air passed through the evaporator 700 passes and the heater core 710.

The evaporator 700 is connected to the compressor 720 through a duct and the compressor 720 is connected to the condenser 730. The condenser 730 is connected to the receiver dryer 740. The receiver dryer 740 is connected to the evaporator 700, And an expansion valve 750 connected to the expansion valve 700 to constitute a cooling cycle. The heater core 710 is connected to the engine 800 to constitute a heating cycle.

Accordingly, in the cooling mode, the indoor air or the outside air blown by the blower 600 is exchanged with the refrigerant flowing in the evaporator 700 through the evaporator 700, So that the blowing air is exchanged with the cooling water flowing through the inside of the heater core 710 through the evaporator 700 and the heater core 710, And heating of the vehicle interior can be performed by being discharged.

The control unit 100 includes an internal / external switching door 630, a blower motor 650, a temperature control door 540 and an output for driving the doors 510d, 520d and 530d of the vents 510, 520 and 530 The compressor 720 is intermittently driven and controlled by intermittently controlling the electromagnetic clutch 722 of the compressor 720 while controlling the air conditioning mode pattern for the inflow / outflow of air / do.

On the other hand, the operation unit 200 installed on the instrument panel includes an air conditioner operation button 210, a wind direction selection button 220, an outside temperature display button 230, a thermostatic button 240, a thermostatic stop button 250, An air flow rate control button 260, a windshield defogger button 270, a rear windshield heating button 280, a temperature setting button 290, an inside / outside air selection button 300, a harmful gas automotive end button 310, A display panel 320 is provided.

The air conditioner operation button 210 has a function of activating the air conditioner during the on operation and stopping the operation of the air conditioner 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 of a vehicle, a foot mode in which air is discharged toward the vehicle floor, and a vent mode in which air is discharged toward the upper half of the vehicle And functions to adjust the opening of each of the vents 510, 520, and 530 in response to the cooling / heating mode. The outside temperature display button 230 functions to display the temperature of the outside air on the display panel 320.

The automatic temperature control button 240 functions to automatically perform the air conditioning mode by the control unit 100. The automatic temperature control stop button 250 functions to stop automatic control of the air conditioning mode. The air volume control button 260 controls the blower motor 650 to adjust the blowing amount.

The windshield removal button 270 functions to operate the de-frost door 510d to open the defrost vent 510, and to remove the windshield pressed against the windshield by the room discharge air. Rear Window The hot wire button (280) functions to remove heat from the rear window by heating the hot wire installed in the rear window.

The temperature setting button 290 functions to adjust the temperature of the indoor discharge air by operating the temperature control door 540 to adjust the opening degree of the air passage on the heater core 710 side. The inside / outside air selection button 300 functions to blow air in an air circulation mode or an outside air mode by operating the switching door 630 so that the inside air inlet 610 or the outside air inlet 620 is opened.

When the noxious gas automotive end button 310 is recognized through the noxious gas detection sensor 460 (see Fig. 1) installed in the front portion of the automobile, (630). The display panel 320 functions to display the current air conditioning mode pattern state.

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

After the vehicle is started in the summer when the outdoor temperature is high, the driver or the passenger selects the automatic temperature control button 240 as shown in FIG. 2, and then the temperature setting button 290 is used to set the desired cooling temperature When the cooling air temperature is set, the control unit 100 performs automatic air conditioning control (S100)

Thereafter, the control unit 100 drives and controls the actuator for driving the inside / outside switching door 630 to switch the outside air inlet 620 to be closed and the inside air inlet 610 to open, thereby switching to the inside air mode (S200)

Next, the control unit 100 determines whether it is a switching condition from the admission mode to the outside air mode (S300)

The switching condition from the bet mode to the outside mode performed in step S300 of the present invention includes a time point at which the indoor temperature detected by the in-vehicle temperature sensor 410 reaches the set temperature manually set by the user, When the indoor temperature detected by the outdoor temperature sensor 420 is not a temperature set manually by the user but reaches a certain reference temperature capable of creating a comfortable cooling environment in the vehicle interior, Is at or below an arbitrary reference temperature, a point at which the solar radiation amount detected by the radiation amount sensor becomes equal to or lower than a reference value, and a point at which a certain time has passed in the air condition mode.

If it is determined in step S300 that the condition for switching from the indoor mode to the outdoor mode is satisfied, the control unit 100 drives and controls the actuator for driving the indoor / outdoor switching door 630 for indoor ventilation, So that the inlet port 620 is opened and the indoor air inlet port 610 is closed, thereby switching to the outside air mode (S400)

If a certain period of time has elapsed from the inside air mode to the outside air mode in step S300, the air conditioner is turned on after a predetermined time elapses from the inside air mode to, for example, 20 minutes, It is preferable to control so that the interior of the vehicle can be cooled sufficiently to be in a comfortable state when the lapse of 20 minutes in the normal mode.

As described above, when the step S400 is performed, the outside hot air is introduced into the room through the outside air inlet 620, and the temperature instantly discharged to the room is raised, and as a result, the room temperature is raised.

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

That is, when the outdoor temperature detected by the outdoor temperature sensor 420 is higher than the indoor temperature detected by the indoor temperature sensor 410, for example, when the indoor temperature is less than 30 ° C (degrees) The indoor temperature compensation step for returning to the original state is performed after varying the amount of opening of the temperature control door 540 while increasing the air volume of the blower while maintaining the outside air mode (S600)

More specifically, an actuator such as a motor for driving the temperature control door 540 is driven and controlled such that the temperature control door 540 is moved forward of the heater core 710 as shown in FIGS. 1 and 4 (a) (Or the side where the maximum cooling can be performed) so as to be in the cooling state. That is, the opening amount of the temperature control door 540, which is the conventional control method shown in FIG. 4 (a), is not made constant as shown by the line "I" Increase the opening dose.

That is, in step S600, the present invention increases the amount of opening of the temperature control door 540 toward the proper cooling state, After returning linearly, it is controlled to be the original state (I line).

4 (b), the blower motor 650 is driven as in the present invention shown in Fig. 4 (b) without driving the blower motor 650 with the same voltage as the line "II " Increase the voltage to increase the airflow.

That is, according to the present invention, in step S600, the voltage for driving the blower is increased to a set value, and then linearly returned for a period of time from an elapse of β seconds (for example, 20 seconds) , And then controls it to be the original state (II line).

On the other hand, the elapsed time (alpha seconds) from when the opening amount of the temperature control door 540 according to the present invention is varied to before returning is equal to or larger than the elapsed time (beta seconds) Can be set.

Thus, as in the result of the determination in step S500, when the vehicle is traveling in a state where the outdoor temperature is higher than the current indoor temperature, that is, the vehicle is left for a long time in an environment with a high ambient temperature in the summer, The temperature instantaneously discharged to the room is raised due to the hot outside air flowing into the interior of the vehicle as in the related art. As a result, the indoor air conditioning environment is pleasant It is possible to control so that the comfortable control time is not increased.

On the other hand, when the vehicle is left for a long time in the summer when the outside air temperature is high, it is possible to control not only the initial cooling but also the initial heating in a state where the vehicle is left for a long period of time A comfortable indoor air conditioning environment can be provided by performing indoor temperature compensation control so that the indoor temperature formed in the indoor mode is kept constantly and constantly, and will be described with reference to FIG. 5 and FIG.

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

Thereafter, the control unit 100 drives and controls the actuator for driving the inside / outside switching door 630 to switch the outside air inlet 620 to be closed and the inside air inlet 610 to open, thereby switching to the inside air mode (S200)

Next, the control unit 100 determines whether it is a switching condition from the admission mode to the outside air mode (S300)

The switching condition from the bet mode to the outside mode performed in step S300 of the present invention includes a time point at which the indoor temperature detected by the in-vehicle temperature sensor 410 reaches the set temperature manually set by the user, When the indoor temperature detected by the outdoor temperature sensor 420 is not a temperature set manually by the user but reaches a certain reference temperature capable of creating a comfortable heating environment in the vehicle interior, Is at or below an arbitrary reference temperature, a point at which the solar radiation amount detected by the radiation amount sensor becomes equal to or lower than a reference value, and a point at which a certain time has passed in the air condition mode.

If it is determined in step S300 that the condition for switching from the indoor mode to the outdoor mode is satisfied, the control unit 100 drives and controls the actuator for driving the indoor / outdoor switching door 630 for indoor ventilation, So that the inlet port 620 is opened and the indoor air inlet port 610 is closed, thereby switching to the outside air mode (S400)

If a certain period of time has elapsed from the inside air mode to the outside air mode in step S300, the air conditioner is turned on after a predetermined time elapses from the inside air mode to, for example, 20 minutes, It is preferable to control so that the interior of the vehicle can be sufficiently cooled to a comfortable state when the time passes normally within 20 minutes in the indoor mode.

As described above, when the step S400 is performed, the hot air outside the room is introduced into the room through the outside air inlet 620, and the temperature instantaneously discharged to the room is lowered, and as a result, the room temperature is lowered.

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

That is, when the outdoor temperature detected by the outdoor temperature sensor 420 is lower than the indoor temperature detected by the in-vehicle temperature sensor 410, the opening amount of the temperature control door 540 is changed while maintaining the outdoor mode In addition, after increasing the air volume of the blower, the indoor temperature compensation step for returning to the original state is performed (S600)

More specifically, an actuator such as a motor for driving the temperature control door 540 is driven and controlled so that the temperature control door 540 is rotated in a direction opposite to the direction in which the heater core 710 is biased as shown in FIGS. 1 and 6 (a) And the opening amount is controlled so as to become a heating state by closing the bypass passage side (or the side where maximum heating is possible) to pass. That is, the opening amount of the temperature control door 540, which is the conventional control method shown in FIG. 6 (a), is not made constant as shown by the line "I" Increase the opening dose.

That is, in the above-described step S600, the opening amount of the temperature control door 540 is increased to a proper heating state, and then the temperature of the temperature control door 540 is increased from the time point of the lapse of? After returning linearly, it is controlled to be the original state (I line).

6 (b), the blower motor 650 is driven as in the present invention shown in Fig. 6 (b) without driving the blower motor 650 at the same voltage as the conventional control method shown in Fig. 4 (b) Increase the voltage to increase the airflow.

That is, according to the present invention, in step S600, the voltage for driving the blower is increased linearly to a predetermined value after the lapse of δ seconds (for example, 20 seconds) , And then controls it to be the original state (II line).

On the other hand, the elapsed time (? Seconds) from when the opening amount of the temperature control door 540 according to the present invention is varied to before returning is equal to or larger than the elapsed time? Second from the increase of the air flow rate of the blower to the return Can be set.

Thus, as in the result of the determination in step S500, when the vehicle is left in a state where the outdoor temperature is lower than the current indoor temperature, that is, The temperature instantaneously discharged to the room is lowered due to the external cold air flowing into the interior of the vehicle as in the prior art. As a result, the indoor air temperature is lowered so that the indoor air conditioning environment is pleasant It is possible to control so that the comfortable control time is not increased.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a configuration of a vehicular air conditioning apparatus for carrying out a control method of the present invention. Fig.

2 is a configuration diagram showing an example of an operation unit installed in an instrument panel for performing the control method of the present invention;

3 is a flowchart showing a control method in a cooling mode of a vehicular air-conditioning apparatus according to the present invention.

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 showing a control method in a heating mode of a vehicular air-conditioning apparatus 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.

FIG. 7 is a graph showing the change of the room temperature and the discharge temperature when switching from the bet mode to the outside mode in the conventional control method.

Description of the Related Art

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

540: Temperature control door 630: Internal / external switching door

650: blower motor 640: blower fan

Claims (8)

An indoor / outdoor switching door for setting the indoor mode or the outdoor mode for cooling or heating; A temperature regulating door for regulating the amount of opening of the heater core through which the air passing through the evaporator or the outside air passes and the bypass passage bypassing the heater core; A control method for a vehicular air conditioner for controlling an air blower that increases or decreases the blowing amount of the inside air or outside air, A compensation condition determination step of determining whether a room temperature or an outside temperature temperature corresponds to a compensation condition after switching from the bet mode to the outside air mode; And a room temperature compensation step of varying the amount of opening of the temperature control door for a predetermined time when the room temperature or the outside air temperature is a compensation condition and returning the air volume of the blower to its original state after increasing the air flow rate , The compensation condition is a case where the outdoor temperature is higher than the summer indoor temperature or the outdoor temperature is lower than the winter indoor temperature, The initial state is a state prior to varying the opening amount of the temperature control door and before the air amount of the blower is increased. A time point when the opening degree of the temperature control door is changed after the opening amount of the temperature control door is changed, Is a time point elapsing after a certain amount of time has elapsed after increasing the air flow rate of the air conditioner to a set value. The method according to claim 1, Further comprising the step of determining whether the condition is the switching condition from the bet mode to the outside mode, The switching from the indoor mode to the outdoor mode is performed when the indoor temperature detected by the in-vehicle temperature sensor 410 reaches a set temperature manually set by the user, The time when the outdoor temperature detected by the outdoor temperature sensor 420 becomes lower than the predetermined reference temperature, the time when the outdoor temperature detected by the outdoor temperature sensor 420 becomes lower than the predetermined reference temperature, Wherein the control unit is at least one of a time when the solar radiation amount detected by the irradiation amount sensor is less than a reference value, and a time when a certain time has elapsed in the air condition mode. delete The method according to claim 1, Wherein the opening degree of the temperature control door is controlled so as to return to a normal state after a predetermined time elapses after varying the amount of opening of the temperature control door. 5. The method of claim 4, And controls the opening amount of the temperature control door to be linearly restored to its original state. The method according to claim 1 or 4, Wherein the air flow rate of the blower is controlled so as to return to a normal state after a predetermined time elapses after increasing the air flow rate of the blower to a set value. The method according to claim 6, Wherein the controller controls the air amount of the blower to be linearly restored to its original state. The method according to claim 6, Wherein the control unit sets the elapsed time from when the opening amount of the temperature control door (540) is varied to before returning to be equal to or larger than the elapsed time from the increase of the air flow rate of the blower to the returning of the air flow. Way.

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