KR101575546B1 - Control method of air conditioner for vehicle - Google Patents

Control method of air conditioner for vehicle Download PDF

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Publication number
KR101575546B1
KR101575546B1 KR1020140173484A KR20140173484A KR101575546B1 KR 101575546 B1 KR101575546 B1 KR 101575546B1 KR 1020140173484 A KR1020140173484 A KR 1020140173484A KR 20140173484 A KR20140173484 A KR 20140173484A KR 101575546 B1 KR101575546 B1 KR 101575546B1
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KR
South Korea
Prior art keywords
door
outside air
sub
air
outside
Prior art date
Application number
KR1020140173484A
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Korean (ko)
Inventor
허재원
최재식
강수연
최호식
김태은
정해석
유상준
Original Assignee
현대자동차주식회사
기아자동차주식회사
한온시스템 주식회사
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Priority to KR1020140173484A priority Critical patent/KR101575546B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00664—Construction or arrangement of damper doors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00835—Damper doors, e.g. position control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
    • B60H1/08—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator
    • B60H1/10—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator the other radiator being situated in a duct capable of being connected to atmosphere outside vehicle
    • B60H1/12—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator the other radiator being situated in a duct capable of being connected to atmosphere outside vehicle using an air blower

Abstract

The present invention relates to a control method of an air conditioner for a vehicle. The objective of the present invention is to provide the control method of the air conditioner for the vehicle, which can minimize a problem on traveling distance reduction and fuel efficiency degradation of the vehicle due to excessive ventilation loss, and can solve a problem on the displeasure of a passenger caused by an increase in CO_2 inside the vehicle on only an inside air mode and a problem on excessive moisture generation on a glass surface in the case of an increase in air inflow rate inside the vehicle. In order to achieve the objective, disclosed is the control method of the air conditioner for the vehicle, including the steps of: a) collecting information on a vehicle speed, an air blower operation step, and CO_2 density and humidity inside the vehicle; b) determining a position of a main dome door and a sub outside air door according to the CO_2 density and humidity inside the vehicle; c) judging whether the determined position of the main dome door and the sub outside air door is in an outside air back flow condition where outside air flowing in by an air blower is discharged to the inside of the vehicle through an inside air inlet at the current vehicle speed and in the air blower operation step; and d) partially mixing outside air through a sub outside air inlet by controlling the position of the main dome door and the sub outside air door according to the determined position, in case it is judged that the determined position is not in the outside air back flow condition.

Description

TECHNICAL FIELD [0001] The present invention relates to a control method for an air conditioner for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a control method for a vehicle air conditioner, and more particularly, to a control method for a vehicle air conditioner capable of minimizing a driving distance reduction and a fuel economy deterioration due to excessive ventilation loss during heating.

As is well known, automobiles are equipped with HVAC (Heating, Ventilation, and Air Conditioning) to control room temperature and create a more comfortable indoor environment.

In recent years, FATC (Full Automatic Temperature Control) system, which maintains a pleasant environment by automatically adjusting the room temperature according to the temperature set by the driver or the passenger, is applied to most vehicles.

In this FATC system, when the user sets the temperature, a sensor signal for detecting a solar radiation amount, an outside temperature sensor for detecting the outside temperature, and an indoor temperature sensor for detecting the inside temperature of the vehicle, The controller calculates the thermal load of the room based on the detected values of the sensors, and determines the discharge mode, the discharge temperature, the discharge direction, and the discharge air flow in consideration of the air-conditioning load corresponding thereto.

In addition, the air conditioning controller may include a discharge temperature sensor for detecting the discharge temperature, an electric heater (e.g., a PTC heater) (auxiliary heater in the case of an internal combustion engine vehicle, or main heater in the case of an electric vehicle) A heater temperature sensor for detecting the temperature of the evaporator, an evaporator temperature sensor for detecting the evaporator temperature, and the like. The intake door actuator, the intake door actuator, and the intake door actuator are controlled such that supply of air for air conditioning is controlled by the determined discharge mode, Temperature control door actuators, mode door actuators, air conditioning blowers, compressors, electric heaters, and the like.

On the other hand, the air conditioner of the vehicle includes an outside air inlet for introducing outside air (outside air), an inside air inlet for introducing inside air (inside air), and an intake door for selectively opening or blocking the outside air inlet and the inside air inlet Intake Door).

In general, as a conventional intake door for selectively introducing the inside air and the outside air, a configuration in which one dome door 1 is rotated using one actuator 1 as shown in Fig. 1 is applied, A configuration is employed in which the two doors 1a and 1b are rotationally operated by using one actuator 2 as shown in Fig.

When the intake door shown in Fig. 2 is applied, it operates only with the inside / outside air on / off concept such as a 100% stall state completely blocking the outside air inlet, or a 100% outside air state completely blocking the stall inlet Can be achieved.

On the other hand, when the intake door shown in Fig. 1, that is, the dome door 1 is applied, not only the operation of the on / off concept of 100% fresh air or 100% external air, but also the internal / external mixing operation partially introducing the inside air and the outside air It is possible.

That is, the dome door provided as one intake door selectively controls the on / off control of the introduction of outdoor air and the introduction of indoor air, It is possible to control so that they can be simultaneously introduced.

However, when the intake door is in the middle position and the vehicle speed increases due to the intrusion of the internal and external air mixture control when the conventional intake door is applied, as shown in Fig. 3, (Cold air that has not been heated) that has been introduced through the air intake port 3 can not flow into the air filter 5 and the air conditioning blower (reference numeral 6 in FIG. 1) So that a phenomenon of entering the room may occur.

In this case, the heating performance and comfort of the passenger seat to which the air inflow port 4 is connected may be deteriorated.

In addition, when the intake door shown in Fig. 2 is applied, the drawback of the inflow inflow control is that the visibility failure due to the indoor fog may occur under the condition of the infecting mode (inflow inflow of 100%), A technique capable of suppressing fog generation is required.

In recent years, the mileage of eco-friendly vehicles such as fuel economy, electric vehicles and fuel cell automobiles has become a major issue in the internal combustion engine vehicles. One of the items that consume a large amount of energy in terms of power consumption for air conditioning is ventilation loss .

In order to achieve indoor ventilation, it is necessary to introduce outside air. In order to reduce the ventilation loss, a ventilation enlargement control technique that appropriately increases the inflow amount is applied.

However, with expanding In figure flows to the prior figure of zoom control being applied to the vehicle, so subjected to control to incorporate a certain amount of outside air to solve the problem that an increase in the amount of indoor CO 2 actually small, the amount of indoor CO 2 There is a problem in that ventilation loss occurs largely by incorporating outside air even under the conditions.

Conventional Enlargement Enlargement Control Technology for indoor ventilation is a control logic for introducing a part (about 20 to 30%) of the inside air only in a specific condition (low speed, high air amount).

Also, it is the vehicle for applying the bet-up control without considering the amount of indoor CO 2 control enlarge the bet to the reduction in the ventilation loss, or maintain the bet user's bet is selected inlet, which amount of indoor CO 2 And thus causes complaints of the passenger.

In addition, a vehicle equipped with an auto defog sensor (ADS) is switched to the outside air only when the humidity is high to secure the visibility of the windshield glass.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in an effort to solve the above problems, and it is an object of the present invention to provide an air conditioner that minimizes problems of reduction in mileage and fuel consumption of a vehicle due to excessive ventilation loss during heating, It is possible to overcome the problem of heating performance and rapid heating, and it is possible to overcome the problem of causing the occupant's discomfort due to the increase of indoor CO 2 when operating only in the stall mode and the problem of excessive moisture on the glass surface when increasing the inflow rate And a control method of the air conditioner for a vehicle.

In order to achieve the above object, according to the present invention, there is provided an air conditioner comprising: an air inflow inlet through which air flows into the air conditioning blower; a main outside air inflow inlet through which the outside air flows; and a sub outside air inlet through which the outside air flows separately from the main outside air inflow opening. A main dome door for selectively opening and closing the air inlet and the main outdoor air inlet; and a sub outdoor door which is positionally controlled to fully open or close the sub outdoor air inlet or regulate the amount of opening thereof, a) collecting the vehicle speed and air conditioning blower operation stage, indoor CO 2 concentration and indoor humidity information; b) determining a position of the main dome door and the sub outside door according to the indoor CO 2 concentration and indoor humidity; c) determining whether the position of the main dome door and the sub-outer door determined as described above is a condition in which outside air introduced by the air conditioning blower at the current vehicle speed and the number of air conditioning blower operation stages is allowed to flow backward to the vehicle interior through the inflow inlet step; And d) controlling the position of the main dome door and the sub-outer door according to the determined position, when it is judged that the outside air backflow is not possible, to thereby allow partial outside air mixing through the sub outside air inlet A method of controlling an air conditioner is provided.

Thus, in the control method for a vehicle air conditioner according to the present invention using a vehicle cabin CO 2 concentration and the indoor humidity information indoor CO 2 and an auto depot that by being performed best bet zoom control in consideration of the (dehumidifying performance), ventilation heating It is possible to improve the reduction of mileage of the vehicle due to excessive loss and the problem of lowering the fuel consumption.

In addition, it is possible to overcome the heating performance and rapid heating in the heating due to the small inflow rate according to the air flow rate by the vehicle speed in the heating condition through the optimum inflow inflow control, the problem of causing uncomfortable occupants due to the increase of indoor CO 2 , It is possible to simultaneously improve the problem of excessive moisture generation.

1 and 2 are views showing a conventional intake door.
3 is a view for explaining the phenomenon that the outside air flows into the room through the inflow inlet.
4 is a cross-sectional view showing the construction of an intake door apparatus applied to the control process of the present invention.
5 is a view showing a position control state of a main dome door and a sub outside door in the control process of the present invention.
6 is a view showing an outside-air backflow path.
FIG. 7 is a view showing an example of setting the allowable and non-permitted intervals of the outside air flow according to the vehicle speed and the number of air blowers in the present invention.
8 is a diagram showing an example in which the control position of the sub outside door is set according to the indoor CO 2 concentration and the room humidity in the present invention.
9 is a flowchart showing a control process according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling an air conditioner for a vehicle, and has a main feature in that an interior widening control technique using two intake doors is applied.

Only indoors CO 2 and increased fogging (fog) can increase the risk of occurrence, bet in the trade-off expansion and indoor CO 2 and fog occurs when applying a bet-up control logic of increasing the bet inflow only reduce the ventilation loss The optimal control logic is required.

That is, there is a need for an optimum venting expansion control technique considering indoor CO 2 and auto depot (dehumidification performance).

4 is a cross-sectional view showing the construction of an intake door apparatus applied to the control process of the present invention. Reference numeral 11 denotes a ventilation air blower for blowing outside air sucked into the air duct 10 at the time of operation of the air- And an air filter provided at the front end of the air conditioning blower 12.

As shown in the figure, a sub outside air inlet 15 is provided which is branched from the main outside air inlet 14 so that the outside air can be separately introduced into the air filter 11 side.

The intake door includes a main dome door 21 which is rotated by an actuator and selectively opens and closes the inflow inlet 13 and the main outside air inflow inlet 14 and a main dome door 21 installed at the sub outside air inflow inlet 15 and rotated by the actuator And a sub outside door 22 for opening / closing the sub outside air inlet 15 or adjusting the opening amount of the sub outside air inlet 15 in a stepwise manner.

The sub exterior door 22 is a door used for interrupting the inflow of outside air through the sub outside air inlet and controlling the inflow amount of the outside air. The door is controlled by an actuator driven and controlled in accordance with a control signal of the controller, .

The plurality of control positions may include a first end position for completely closing the sub air opening 15 and a second end position for setting the opening amount of the sub air opening 15 to be gradually increased, And a fifth-stage position.

In the 100% stall mode, the main dome door 21 completely closes the main outside air inlet 14 when the first end position for completely closing the sub outside air inlet 15 is a position when the 100% When the sub air door 22 is controlled to fully open the air inlet 13, the sub outdoor door 22 is controlled to the first end position.

The main dome door 21 is rotatably operated to fully open one of the inflow inlet 13 and the main outside air inlet 14 and completely close the other one. The drive is controlled by the control signal of the control unit.

That is, the actuator is driven and controlled by the control signal outputted from the control unit to rotate the main dome door 21 and the sub-outer door 22 to the target position.

The fifth stage position is a maximum opening position for opening the sub openings 15 as much as possible so that when the main dome door 21 completely closes the inflow opening 13 and completely opens the main outside air inlet 14, The door 22 can be controlled to the fifth-stage position.

In this case, the vent is completely cut off and the 100% outdoor mode where only the outside air is introduced is obtained.

When the main dome door 21 opens the inflow inlet 13 and closes the main outside air inlet 14, the sub outside door 22 may be controlled to the fifth end position because the inside air and the outside air are mixed The partial air mixture state in which the inflow amount of the outside air becomes the maximum during the partial outside air mixing mode becomes the mixed state of the outside air.

As described above, according to the present invention, the position of the sub outdoor unit door 22 is set to be the preset outside air space, rather than the linear control method of linearly increasing the outside air inflow amount through the sub outside air inlet 15 and the opening amount of the sub outside air inlet 15. [ A step control method of stepwise controlling the inflow amount and opening amount position is applied.

Since the sub outside door 22 is not stably maintained and may cause system instability when the linear control method of outside air inflow is applied, the sub outside air inlet 15 is divided into four equal parts And a step control system for stepwise controlling the position of the sub outside door 22 at the position of each end is applied, thereby improving the stability of the system operation.

5 is a view showing a position control state of the main dome door 21 and the sub open / close door 22, wherein a) shows a state in which the position of the main dome door 21 opens the inflow and outflow opening 13, To the first end position in which the sub-outer door 22 completely closes the sub-outer air inlet 15 in a state in which the sub-outer door 22 is closed so as to close the sub-outer air inlet 15.

C) allows the sub outside door 22 to open the sub outside air inlet 15 as much as possible while the position of the main dome door 21 is controlled to close the main air inlet 13 and open the main outside air inlet 14 Indicates the 100% ambient mode state controlled by the fifth stage position.

B) is a state in which the sub outside air door 22 is moved from the sub outside air inlet 15 to the sub outside air inlet 15 in a state where the main outside door 21 is in a state of being controlled so as to open the inflow inlet 13 and close the main outside air inlet 14. [ The second stage, the third stage, the fourth stage, and the fifth stage are controlled so as to open the second stage, the second stage, the fourth stage, and the fifth stage.

At this time, the amount of opening of the sub-outside air inlet and the amount of outside air inflow (opening amount of the sub outside air inlet) according to the position of the sub outside air door 22 become the second end, the third end, the fourth end and the fifth end.

Meanwhile, the following description will be made of an indoor expansion control method considering the indoor CO 2 and the auto depot in a state in which the hardware configuration as described above is applied.

In carrying out a bet-up control of the air conditioner, CO 2 concentration in the vehicle cabin is measured by the CO 2 sensor (ppm) (in this case the sensor value, or there can be a prediction value), a windshield glass installed like the inner surface The control unit receives information on the humidity of the vehicle (%) measured by the auto-deploy sensor from the air conditioning controller.

In this case, the control unit is a control element provided separately from the air conditioning controller, but may be configured such that the air conditioning controller replaces the function of the control unit without providing a separate control unit.

When the concentration of the indoor CO 2 increases, the control unit reduces the amount of indoor CO 2 by partially entering the outdoor air, and when the room humidity is high and there is a high risk of fogging, the outdoor air flows into the vehicle glass including the windshield glass Thereby lowering the moisture content.

The sub outside door 22 is controlled in such a manner that the position of the main dome door 21 is controlled so as to open the main air inlet 13 and close the main outside air inlet 14 as described above, Is controlled to the position of the second stage, the third stage, the fourth stage, and the fifth stage.

In addition, the control unit controls the current vehicle speed and the air conditioning blower 12 in the partial outdoor air mixing mode (the second, third, fourth, and fifth stage positions of the sub outdoor unit) The main outside dome door 21 is positioned to open the main outside air inlet 14 at the time of opening the main outside dome door 21, Make it 100% ambient mode.

The air conditioning blower 12 is controlled so as to be driven by the air-conditioning controller in a single selected number for controlling the air-conditioning airflow amount to cope with the air-conditioning load in an ordinary automotive air conditioning system. When the number of revolutions is determined for each step, The operating voltage applied to the air conditioning blower 12 is controlled to drive the air conditioning blower 12 at a rotational speed corresponding to the number of steps.

Since the number of revolutions of the air conditioning blower 12 is set to be higher as the number of stages of the air conditioning blower 12 is higher, the inflow amount (blower intake amount) of the indoor air and the outside air increases.

When the outside air flows backward at the air inlet port 13 and is discharged to the knees of passengers aboard the passenger seat in accordance with the control position of the sub outside door 22 controlling the outside air mixing and the vehicle speed and the number of operating steps of the air conditioning blower 12 (Outside air reverse flow), the outdoor air discharge amount due to the reverse flow increases as the vehicle speed is higher and the number of steps of the air conditioning blower 12 is lower.

FIG. 6 is a view showing the outside air reverse flow path. In the passenger seat, a suction port for sucking air from the vehicle interior is located, and outside air introduced through the auxiliary air inlet 15 includes the air filter 11 and the air conditioning blower 12 The air can flow back through the air inlet 13 and be discharged to the passenger compartment through the intake port of the passenger seat.

The present inventor has applied the two door system as shown in FIG. 4 to the actual vehicle to construct the control logic, and evaluated the outside air backflow according to each position of the sub outside door 22. According to the evaluation result, (See FIG. 4A), the main outside air inlet 14 is opened and the sub outside door 22 is controlled to the first end position (sub outside air inlet full stop position) (See (c) of FIG. 4) in which the outside air door 22 is controlled to the fifth-stage position (sub air opening maximum open position), and the air inlet opening 13 is opened, It is possible to confirm that the above-described outside air backflow phenomenon does not occur in the partial ambient air mixed mode controlled by the second stage position.

As shown in FIG. 7, the vehicle outside air introduction modes of the second, third, fourth, and fifth stages of the sub outdoor vehicle door 22, And the possibility of the backflow of the outside air was checked and selected based on the number of stages in the control logic.

Referring to FIG. 7, it can be seen that the outside air reverse flow enabling and disabling intervals are set according to the vehicle speed and the number of stages of the air blower. In each position of the air blower, Section is set.

As shown in FIG. 7, a 100% air condition mode in which the sub-outdoor door 22 is in the first-stage position, and the sub-outdoor door 22 is in the second- There is no vehicle speed range in which outside air can flow backward and the number of air conditioning blower stages in the outside air mixing mode.

In the case of applying the logic for determining the outside air backflow enabling / disabling condition according to the vehicle speed and the air conditioning blower stage to the actual air conditioning control from the setting information shown in Fig. 7 stored in advance in the control unit and stored in advance, the hysteresis (For example, 20 km / h based on the vehicle speed).

Further, in consideration of the air flow rate required according to the vehicle interior CO 2 concentration and the indoor humidity is carried out inside and outside group control of the air conditioner, and Fig. 8 is a control position of the sub-air door 22 in accordance with the indoor CO 2 concentration and ambient humidity A set example is shown.

The control air flow rate required by the indoor CO 2 concentration, and a humidity sensor with auto depot indoor CO 2 concentration and room humidity by using the data as shown in FIG. 8 based on the indoor humidity detected by the sensor is detected by the CO 2 sensor The position of the sub exterior door 22 corresponding to the sub exterior door 22 can be determined.

In FIG. 8, the 100% outside air mode means that the position of the main dome door 21 is the main outdoor air inlet opening position and the position of the sub outdoor door 22 is the fifth stage position.

8, the positions of the first, second, third, fourth, and fifth stages are basically the positions of the sub-outer door 22 and the positions of the first to fifth stages The position of the main dome door 21 is determined to be the inside air inlet opening position and the second to fifth stages in FIG. 8 correspond to the partial outside air mixing mode in which the outside air inflow amount is controlled according to the position of the sub outside air door .

However, since the first end position is the sub-outside air inlet full shutoff position (opening amount is 0%), it means 100% ventilation mode.

It is preferable to apply hysteresis (for example, a CO 2 concentration of 100 ppm and a humidity of 3%) in positioning the sub-outdoor door 22 according to the indoor CO 2 concentration and the indoor humidity.

In the case of a vehicle without a CO 2 sensor, in order to maintain the indoor CO 2 concentration below a predetermined level, the 100% air-conditioning mode control for the second set time is performed every time the 100% .

Also, in the vehicle without the CO 2 sensor, the condition in which the sub outside door 22 is in the second stage, the third stage, the fourth stage, or the fifth stage is a partial ambient air mixed mode and the air conditioning blower 12) is maintained for the third set time, the 100% ambient air mode control for the fourth set time is performed.

9 is a flowchart showing the control process according to the present invention. After the start-on, the control unit determines the vehicle speed information detected by the vehicle speed sensor, the operation number of the air conditioning blower 12 (or the operating voltage applied to the blower) The indoor humidity of the vehicle detected by the depo sensor, and the in-vehicle indoor CO 2 concentration information detected by the CO 2 sensor from the air conditioning controller (S 11).

In addition, the air conditioner controller allows the user to check whether the vent or outside air is manually selected by operating the inside / outside air button, manually selecting the inside / outside air Mode selection) (step S12).

Accordingly, when the user manually selects the outside air mode, the control unit determines the position of the primary intake door set at the time of selecting the manual outside air (S13, S14). In the sub outside air door second- The position of the door 21 (inflow inlet opening opening) and the position of the sub outside / outside door 22 (the second end, minimum outside air inflow amount minimum position, minimum outside air inflow port minimum opening amount position) are determined.

Next, a second intake door position corresponding to the indoor humidity of the vehicle detected by the auto-deploy sensor and the indoor CO 2 concentration detected by the CO 2 sensor is determined (S 16).

First, the position of the main dome door 21, the position of the sub outside door 22, and the position of the main dome door 21 according to the indoor CO 2 concentration, The position of the outside door 22 is determined using the setting information illustrated in Fig.

At this time, the position of the secondary intake door is determined by the position of the intake door (the main dome door and the sub outdoor door) determined from the indoor CO 2 concentration and the position at the intake door position determined from the indoor humidity Position).

After the position of the second intake door is determined in step S16, the outside air inflow amount at the first intake door position and the outside air inflow amount at the second intake door position are compared (S17).

 At this time, if the outdoor air inflow amount at the second intake door position is larger, it is determined from the vehicle speed and the air-conditioning blower number information whether the second intake door position is the outside air backflow enabling condition using the setting information illustrated in FIG. 7 (S18) .

On the other hand, if the outside air inflow amount at the first intake door position is equal to or greater than the outside air inflow amount at the second intake door position, the control unit controls the position of the main dome door 21 and the sub- That is, to the position of the outside air mixing mode at the second stage of the sub outside door (S19c).

If it is determined in step S18 that the secondary intake door position is the outside air backflow enabling condition, that is, if the position of the sub outside door 22 is the third, fourth, or fifth position, The sub outside door 22 is positioned at the fifth stage position to the outside air inlet opening position and the sub outside door 22 is controlled to the 100% outside air mode in which the outside air reverse flow does not occur (S19a) .

If it is determined that the outside air backflow enabling condition is not satisfied, the position of the main dome door 21 and the position of the sub outdoor door 22 are controlled to the secondary intake door position determined in step S16 (S19b).

On the other hand, if the user selects the inside / outside air automatic selection (air conditioning 'Auto' mode selection) in step S12, or if the manual bet mode is selected in step S13, the control unit sets the primary intake door position S15 The position of the main dome door 21 is determined such that the position of the sub air door 22 is shifted from the first air door position to the first air door position (S15).

The second intake door position is determined in the same manner as when the outside air mode is selected (S16 '). Then, the outside air inlet amount at the first intake door position and the second intake door position And compares the inflow amount of the outside air at the position (S17 ').

 At this time, if the inflow amount of the outside air at the second intake door position is larger, it is determined from the vehicle speed and air-conditioning blower number information whether the second intake door position is the outside air backflow enabling condition using the setting information illustrated in FIG. 7 (S18 ' ).

On the other hand, if the outside air inflow amount at the first intake door position is equal to or greater than the outside air inflow amount at the second intake door position, the control unit sets the position of the main dome door 21 and the sub outside door 22 to 1 The control is controlled to the car intake door position, that is, the 100% stall position (S19c ').

It is also checked if the secondary intake door position corresponds to the outside air backflow condition according to the vehicle speed and the air conditioning blower stage. If the secondary intake door position is not the outside air backflow occurrence condition, the main dome door 21 and the sub exterior door 22 (S19b '). In the case of the outside air backflow occurrence condition, the position of the main dome door 21 and the position of the sub outside door 22 are controlled to 100% outside air mode as in step S19a (S19a' ).

Further, in order to manage the in-vehicle CO 2 concentration to a certain level or lower after the 100% stall mode is entered in step S 19 c ', the 100% stall mode is maintained for the first stall time, Control can be set.

Here, the 100% outside air mode means that the position of the subdomain door is controlled to the fifth open position, that is, the opening of the main dome door, the opening of the inlet opening and the opening of the outside air inlet.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the scope of the present invention is not limited to the disclosed exemplary embodiments. Forms are also included within the scope of the present invention.

10: Air duct 11: Air filter
12: Air conditioner blower 13:
14: Main outside air inlet 15: Sub outside air inlet
21: Main dome door 22: Sub outside door

Claims (9)

A main outside air inlet opening through which air flows in by the air conditioning blower, a main outside air inlet opening through which the outside air flows, and a sub outside air inlet opening through which the outside air flows separately from the main outside air inlet, A control method for an automotive air conditioner having a door and a sub outside door which is positionally controlled so as to fully open or close a sub outside air inlet or to gradually adjust the opening amount,
a) collecting the vehicle speed and air conditioning blower operation stage, indoor CO 2 concentration and indoor humidity information;
b) determining a position of the main dome door and the sub outside door according to the indoor CO 2 concentration and indoor humidity;
c) determining whether or not the positions of the main dome door and the sub outside door are determined to be the outside air backflow capable of being discharged to the vehicle interior through the air inlet port by the air conditioning blower at the current vehicle speed and the air conditioning blower operation number step; And
and d) controlling the position of the main dome door and the sub-outer door according to the determined position so as to allow partial outside air mixing through the sub outside air inlet when it is determined that the outside air backflow is not possible, A method of controlling a device.
The method according to claim 1,
Wherein the position of the main dome door determined in steps b), c) and d) is a position for opening the air inlet and closing the main outdoor air inlet.
The method according to claim 1,
The position of the sub outside door determined in the steps b), c) and d) may be determined by the position of the sub outside door determined according to the indoor CO 2 concentration and the position of the sub outside door determined according to the room humidity And the opening amount of the inlet is large.
The method according to claim 1,
If it is determined in step c) that the outside air backflow is possible, the main dome door is moved to the main outdoor air inlet opening and indoor air inlet shutoff position, and the sub outdoor air door is set to the maximum opening position of the sub outdoor air inlet, And a control unit for controlling the air conditioner.
The method according to claim 1 or 4,
If the user selects the outside air mode manually,
The position of the primary intake door is determined such that the position of the main outside door is blocked to the main outside air inlet opening and the inside air inlet opening position and the sub outside air door is set to the set minimum opening position of the sub outside air inlet,
The position of the main dome door and the sub outside door determined in the step b) is set as the position of the secondary intake door,
Wherein the step (c) and the step (d) are carried out when the inflow amount of the outside air at the second intake door position is larger than the inflow amount of the outside air at the first intake door position.
The method of claim 5,
Wherein the position of the main dome door and the position of the sub outside door are controlled to the position of the primary intake door when the outside air inflow amount at the primary intake door position is equal to or greater than the outside air inflow amount at the secondary intake door position, A method of controlling a device.
The method according to claim 1 or 4,
When the user manually selects the bet mode or the inside / outside air automatic control mode,
The position of the main dome door is determined as the position of the primary intake door to the main outdoor air inlet opening and the indoor air inlet opening position and the position of the sub outdoor air door to the sub outdoor air inlet blocking position,
The position of the main dome door and the sub outside door determined in the step b) is set as the position of the secondary intake door,
Wherein the step (c) and the step (d) are carried out when the inflow amount of the outside air at the second intake door position is larger than the inflow amount of the outside air at the first intake door position.
The method of claim 7,
If the outside air inflow amount at the primary intake door position is equal to or greater than the outside air inflow amount at the secondary intake door position, the position of the main dome door and the position of the sub outside door are controlled to the primary intake door position, And a control unit for controlling the air conditioner.
The method of claim 8,
When the 100% stoating mode is maintained for the first set time, the position of the main dome door is changed to the closing inlet inlet opening and the outside air inlet opening position for the second set time, and the position of the sub outside door to the maximum opening position Wherein the control of the air conditioner is performed in a manner that the air conditioner is controlled to be in a closed state.




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Publication number Priority date Publication date Assignee Title
KR20170012821A (en) * 2015-07-24 2017-02-03 한온시스템 주식회사 Air conditioning system for automotive vehicles

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JPH09142133A (en) * 1995-11-24 1997-06-03 Denso Corp Air-conditioning device for vehicle
JP2006193116A (en) * 2005-01-17 2006-07-27 Denso Corp Inside/outside air switching device
JP2010221760A (en) * 2009-03-19 2010-10-07 Mitsubishi Motors Corp Ventilator
KR20140095626A (en) * 2013-01-24 2014-08-04 한라비스테온공조 주식회사 Blower unit of air conditioner for vehicle

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JPH09142133A (en) * 1995-11-24 1997-06-03 Denso Corp Air-conditioning device for vehicle
JP2006193116A (en) * 2005-01-17 2006-07-27 Denso Corp Inside/outside air switching device
JP2010221760A (en) * 2009-03-19 2010-10-07 Mitsubishi Motors Corp Ventilator
KR20140095626A (en) * 2013-01-24 2014-08-04 한라비스테온공조 주식회사 Blower unit of air conditioner for vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170012821A (en) * 2015-07-24 2017-02-03 한온시스템 주식회사 Air conditioning system for automotive vehicles
KR102346524B1 (en) * 2015-07-24 2022-01-05 한온시스템 주식회사 Air conditioning system for automotive vehicles

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