KR20240080190A - Air conditioning system for automotive vehicles - Google Patents

Abstract

The present invention relates to an air conditioning system for a vehicle, which is configured to reflect the actual discharge air temperature inside the vehicle regardless of the detection error of the discharge air temperature sensor that occurs when the air discharge vent is closed. The purpose is to accurately control the temperature inside the vehicle despite the detection error of the discharge air temperature sensor.
In order to achieve this object, the present invention provides a vehicle air conditioning system that variably controls the position of the temp door according to the target discharge temperature calculated in advance and the discharge air temperature in the vehicle interior of the discharge air temperature sensor installed on the air discharge vent side, Determine the detection error of the discharge air temperature inside the vehicle by the discharge air temperature sensor using preset logic; As a result of the judgment, when there is an error in detecting the discharge air temperature inside the vehicle, the upper and lower limits of the operating range of the Temp door are limited from the maximum state to a preset range, preventing the Temp door from being excessively controlled beyond the limited upper and lower limits. A control unit is provided.

Description

Vehicle air conditioning system {AIR CONDITIONING SYSTEM FOR AUTOMOTIVE VEHICLES}

The present invention relates to an air conditioning system for a vehicle, and more specifically, by configuring it to reflect the actual discharge air temperature inside the vehicle, regardless of the detection error of the discharge air temperature sensor that occurs when the air discharge vent is closed, This relates to an air conditioning system for a vehicle that can accurately control the temperature inside the vehicle despite a detection error in the discharge air temperature sensor due to the closing of the air discharge vent.

Recently, air conditioning systems for vehicles have been improved with automatic control methods.

As shown in FIG. 1, the automatic control type air conditioning system (hereinafter abbreviated as “air conditioning system”) detects temperature conditions inside and outside the vehicle through various sensors 1, 3, and 5, and detects the temperature inside and outside the vehicle. The control unit 10 processes the conditions and the user-set temperature input from the temperature control switch 7 to calculate the target discharge temperature.

And according to the calculated target discharge temperature, the air conditioner (12), heater (14), blower (16), intake door (18), and temp door (20) ) and the mode door (22) are automatically controlled.

Therefore, the discharge air temperature and wind volume and direction inside the vehicle are automatically adjusted according to the target discharge temperature. As a result, the temperature inside the vehicle is always maintained comfortably.

Meanwhile, according to changes in the vehicle's driving environment, the temperature of the evaporator 12a and the heater core 14a of the air conditioner 12 suddenly changes, as shown in FIG. 2, and the discharge air inside the vehicle is changed by the control unit 10. When the temperature suddenly changes and deviates from the target discharge temperature, for example, the evaporator 12a and When the temperature of the heater core 14a changes and the discharge air temperature inside the vehicle suddenly changes and deviates from the target discharge temperature, the opening position of the temp door 20 is variably controlled to compensate for this.

In particular, the control unit 10 compares the discharge air temperature inside the vehicle interior and the target discharge temperature input from the discharge air temperature sensor 24 and continuously checks whether the actual discharge air temperature inside the vehicle interior is controlled in accordance with the target discharge temperature. At this time, if the air discharge temperature inside the vehicle of the discharge air temperature sensor 24 is not controlled in accordance with the target discharge temperature and a temperature deviation occurs between the two, the opening position of the Temp door 20 is adjusted in response to the generated temperature deviation. Correct.

Therefore, it responds to temperature changes in the evaporator 12a and heater core 14a due to sudden changes in the driving environment and to changes in the discharge air temperature inside the vehicle interior. As a result, despite sudden changes in the driving environment and resulting temperature changes in the evaporator 12a and heater core 14a, the discharge air temperature inside the vehicle interior can be consistently controlled to match the target discharge temperature.

Here, the discharge air temperature sensor 24 is installed on the side of the air discharge vent 30 in the vehicle interior, as shown in FIG. 2. In particular, it is installed on the side of at least one air discharge vent 30 among the air discharge vents 30 in the vehicle interior. At this time, it is installed on a specific vent with the largest air discharge volume among the air discharge vents 30. do. For example, it is usually installed in the center vent in the center of the vehicle interior and the floor vent in the floor portion of the vehicle interior, respectively.

In the case of an individual air conditioning device that independently cools and heats each air conditioning zone in the vehicle interior, the discharge air temperature sensor 24 is installed for each air conditioning zone. For example, in the case of a dual type air conditioning system that independently cools and heats the driver's seat and passenger seat in the vehicle interior, discharge air temperature sensors 24 are installed for each air conditioning area on the driver's seat and passenger seat.

Therefore, it is configured to detect the temperature of the discharged air inside the vehicle interior discharged to each air conditioning zone.

However, in this conventional air conditioning device, when the grill 32 on the air discharge vent 30 side where the discharge air temperature sensor 24 is installed is closed, the air passing through the evaporator 12a and the heater core 14a is closed. The air does not reach the discharge air temperature sensor 24 and stagnates on the upstream side. Due to this air stagnation phenomenon, the discharge air temperature sensor 24 cannot accurately detect the air discharge temperature inside the vehicle, resulting in a “detection error phenomenon.” There is a downside to this occurring.

Additionally, due to these shortcomings, the air conditioning system has no choice but to be controlled based on inaccurate air discharge temperature data inside the vehicle, and as a result, there is a problem in that the comfort inside the vehicle is significantly reduced.

In particular, under the condition that the air discharge vent 30 is closed, when the temperature of the evaporator 12a and the heater core 14a changes due to a change in the driving environment and the discharge air temperature inside the vehicle interior changes due to the change, the vehicle interior Since changes in discharge air temperature cannot be accurately detected, there is a drawback in that it cannot respond to changes in discharge air temperature inside the vehicle and the resulting deviation between the discharge air temperature inside the vehicle and the target discharge temperature.

As a result, there is a disadvantage in that the discharge air temperature in the vehicle interior cannot be adjusted to the target discharge temperature, and as a result, when the discharge air temperature in the vehicle interior changes, the comfort in the vehicle interior is significantly reduced.

The present invention was devised to solve the above-described conventional problems, and its purpose is to detect the discharge air temperature inside the vehicle interior of the vehicle interior by the discharge air temperature sensor that occurs when the air discharge vent is closed. The aim is to provide a vehicle air conditioning device that can reflect the discharge air temperature.

Another object of the present invention is to configure the air discharge vent to reflect the actual discharge air temperature inside the vehicle, regardless of the error in detecting the discharge air temperature inside the vehicle interior of the discharge air temperature sensor that occurs when the air discharge vent is closed. The purpose is to provide an air conditioning device for a vehicle that can accurately control the temperature inside the vehicle despite a detection error in the discharge air temperature inside the vehicle due to the discharge air temperature sensor closing.

Another object of the present invention is to configure the air discharge vent to reflect the actual discharge air temperature inside the vehicle, regardless of the error in detecting the discharge air temperature in the vehicle interior by the discharge air temperature sensor due to the closing of the air discharge vent. The object of the present invention is to provide an air conditioning device for a vehicle that can precisely control the temperature inside the vehicle to the target discharge temperature, regardless of frequent changes in vehicle interior discharge air temperature under closed conditions.

In order to achieve this purpose, the vehicle air conditioning system according to the present invention variably controls the position of the temp door according to the target discharge temperature calculated in advance and the discharge air temperature in the vehicle interior of the discharge air temperature sensor installed on the air discharge vent side. In the vehicle air conditioning system, a detection error in the discharge air temperature inside the vehicle interior of the discharge air temperature sensor is determined through a preset logic; As a result of the judgment, when there is a detection error in the discharge air temperature inside the vehicle, the upper and lower limits of the operating range of the Temp door are limited from the maximum state to a small preset range, preventing the Temp door from being excessively controlled beyond the limited upper and lower limits. It is characterized by including a control unit that prevents.

In addition, when there is a detection error in the discharge air temperature inside the vehicle, the control unit calculates the upper and lower limits of the operating range of the TEMP door using preset logic and limits the operating range of the TEMP door based on the calculated upper and lower limits. It is characterized by

In addition, when there is an error in detecting the discharge air temperature in the vehicle interior, the control unit calculates the upper and lower limit values of the TEMP door in both directions from the current position by a preset angle, and limits the operating range of the TEMP door based on this. It is characterized by

And the control unit is characterized in that it determines a detection error in the discharge air temperature in the vehicle interior of the discharge air temperature sensor that occurs when the air discharge vent is closed.

And the control unit calculates a temperature deviation between the predicted temperature of the vehicle interior discharge air obtained through a preset logic and the vehicle interior discharge air temperature input from the discharge air temperature sensor, and determines that the temperature deviation is greater than or equal to a preset reference temperature deviation value. In this case, it is determined that the air discharge temperature in the vehicle interior of the discharge air temperature sensor has detected an error because the air discharge vent on which the discharge air temperature sensor is installed is closed, and if the temperature deviation is less than the reference temperature deviation value, the discharge air temperature sensor It is characterized in that it is determined that the discharge air temperature sensor normally detects the air discharge temperature in the vehicle interior because the air discharge vent installed is open.

According to the vehicle air conditioning system according to the present invention, when an error occurs in detecting the discharge air temperature in the vehicle interior by the discharge air temperature sensor due to the closing of the air discharge vent, the previously predicted discharge air temperature in the vehicle interior is changed to the actual discharge air temperature in the vehicle interior. Because it has a recognition structure, it has the effect of being able to reflect the actual discharge air temperature inside the vehicle cabin, regardless of the error in detecting the discharge air temperature inside the vehicle interior that occurs when the air discharge vent is closed.

In addition, regardless of the detection error in the discharge air temperature in the vehicle interior that occurs when the air discharge vent is closed, the actual discharge air temperature in the vehicle interior can be reflected, so even in the detection error in the discharge air temperature in the vehicle interior due to the closure of the air discharge vent. Nevertheless, it has the effect of accurately controlling the temperature inside the car.

In addition, regardless of the error in detecting the discharge air temperature in the vehicle interior due to the closing of the air discharge vent, the actual discharge air temperature in the vehicle interior can be reflected, so when the discharge air temperature in the vehicle interior frequently changes under the condition of closing the air discharge vent, frequent Despite changes in the discharge air temperature inside the vehicle, it has the effect of accurately reflecting the actual discharge air temperature inside the vehicle.

In addition, despite frequent changes in vehicle interior discharge air temperature, the actual vehicle interior discharge air temperature can be accurately reflected, so the temperature in the vehicle interior is precisely controlled to the target discharge temperature regardless of frequent changes in vehicle interior discharge air temperature. This can be done, and through this, there is an effect of improving the comfort inside the car.

In addition, regardless of the error in detecting the discharge air temperature in the vehicle interior due to the closing of the air discharge vent, the actual discharge air temperature in the vehicle interior can be reflected, so when the discharge air temperature in the vehicle interior frequently changes under the condition of closing the air discharge vent, frequent Regardless of changes in the discharge air temperature inside the vehicle, the temperature inside the vehicle can be precisely controlled to the target discharge temperature. Through this, the vehicle interior can always be comfortably controlled regardless of frequent changes in discharge air temperature inside the vehicle. There is.

In addition, when a specific discharge air temperature sensor among multiple discharge air temperature sensors causes a detection error due to the closing of the air discharge vent, the detection data from the discharge air temperature sensor on the air discharge vent side that is not closed is actually discharged into the vehicle interior. Since the structure recognizes the air temperature and reflects it, it is possible to prevent detection errors in a specific discharge air temperature sensor due to the closing of a specific air discharge vent and operation errors in the air conditioning system.

In addition, it is possible to prevent detection errors in a specific discharge air temperature sensor due to the closing of a specific air discharge vent and operational errors in the air conditioning system resulting from this, preventing a decrease in air quality inside the vehicle interior due to a detection error in a specific discharge air temperature sensor. There is a preventable effect.

In addition, when an error occurs in the discharge air temperature sensor's detection of the discharge air temperature in the vehicle interior due to the closing of the air discharge vent, the upper and lower limits of the opening amount of the Temp door are limited, so the discharge air in the vehicle interior due to the closing of the air discharge vent When a temperature detection error occurs, it has the effect of preventing a sudden change in the opening amount of the Temp door.

In addition, in the event of a detection error in the discharge air temperature in the vehicle interior due to the closing of the air discharge vent, a sudden change in the opening amount of the Temp door can be prevented, so that in the event of a detection error in the discharge air temperature in the vehicle interior due to the closing of the air discharge vent, , it is possible to prevent rapid temperature changes in the air discharged into the vehicle interior, and this has the effect of improving the comfort inside the vehicle interior.

1 is a block diagram showing a conventional vehicle air conditioning system;
Figure 2 is a cross-sectional view showing the installation position of the discharge air temperature sensor that constitutes a conventional vehicle air conditioning system;
3 is a block diagram showing a first embodiment of a vehicle air conditioning system according to the present invention;
4 is a flow chart showing an operation example of the vehicle air conditioning system of the first embodiment;
5 is a block diagram showing a second embodiment of a vehicle air conditioning system according to the present invention;
6 is a flow chart showing an operation example of the vehicle air conditioning system of the second embodiment;
7 is a block diagram showing a third embodiment of a vehicle air conditioning system according to the present invention;
8 is a flow chart showing an operation example of the vehicle air conditioning system of the third embodiment;
9 is a block diagram showing a fourth embodiment of a vehicle air conditioning system according to the present invention;
10 is a flowchart showing an operation example of the vehicle air conditioning system of the fourth embodiment;
Figure 11 is a graph showing an operation example of the vehicle air conditioning system of the fourth embodiment. When a detection error occurs in the discharge air temperature sensor due to the closing of the air discharge vent, the control of the temp door and the resulting change in discharge air temperature in the vehicle interior are compared to the conventional method. This is a drawing comparing technology.

Hereinafter, preferred embodiments of a vehicle air conditioning system according to the present invention will be described in detail based on the attached drawings (the same components as those of the prior art will be described using the same symbols).

[First Example]

First, before looking at the features of the vehicle air conditioning system according to the present invention, the automatic control type air conditioning system will be briefly described with reference to FIG. 3.

The automatic control type air conditioning system detects temperature conditions inside and outside the vehicle through various sensors (1, 3, 5), and sends the detected temperature conditions inside and outside the vehicle and the user-set temperature input from the temperature control switch (7) to the control unit. (10) is processed to calculate the target discharge temperature.

And the air conditioner (12), heater (14), blower (16), intake door (18), temp door (20), and mode door (22) are automatically controlled according to the calculated target discharge temperature. Therefore, the discharge air temperature and wind volume and direction inside the vehicle are automatically adjusted according to the target discharge temperature.

Meanwhile, the control unit 10 determines that the temperatures of the evaporator 12a (see FIG. 2) and the heater core 14a (see FIG. 2) of the air conditioner suddenly change according to changes in the driving environment of the vehicle, so that the discharge air temperature inside the vehicle increases. If the temperature suddenly changes and deviates from the target discharge temperature, the opening position of the temp door 20 is variably controlled to compensate for this.

In particular, the vehicle interior discharge air temperature input from the discharge air temperature sensor 24 is compared with the target discharge temperature to continuously check whether the actual discharge air temperature inside the vehicle interior is controlled in accordance with the target discharge temperature. At this time, the discharge air If the interior air discharge temperature of the on sensor 24 is not controlled according to the target discharge temperature and a temperature deviation occurs between the two, the opening position of the temp door 20 is corrected in response to the generated temperature deviation.

Therefore, it responds to temperature changes in the evaporator 12a and heater core 14a due to sudden changes in the driving environment and to changes in the discharge air temperature inside the vehicle interior.

The discharge air temperature sensor 24 is installed on the side of the air discharge vent 30 in the vehicle interior (see Fig. 2). In particular, it is installed on the side of at least one air discharge vent 30 among the air discharge vents 30 in the vehicle interior. At this time, it is installed on a specific vent with the largest air discharge volume among the air discharge vents 30. do.

In the case of an individual air conditioning device that independently cools and heats each air conditioning zone in the vehicle interior, the discharge air temperature sensor 24 is installed for each air conditioning zone.

Next, the features of the vehicle air conditioning system according to the present invention will be examined in detail with reference to FIGS. 3 and 4.

First, referring to FIG. 3, the air conditioning device of the present invention is equipped with a vehicle interior discharge air temperature prediction unit 40.

The vehicle interior discharge air temperature prediction unit 40 is a type of operation logic that includes factors that cause changes in vehicle interior discharge air temperature, such as engine speed (RPM), engine coolant temperature, internal and external air mode status, and vehicle speed. It is configured to predict the vehicle interior discharge air temperature by processing factors such as pre-built logic (hereinafter, the vehicle interior discharge air temperature predicted by the vehicle interior discharge air temperature prediction unit 40 is referred to as the vehicle interior discharge air temperature). (referred to as “predicted temperature”).

The cabin discharge air temperature prediction logic, which predicts the cabin discharge air temperature through factors such as engine speed, engine coolant temperature, internal and external air mode status, and vehicle speed, is a known technology, so a detailed description thereof will be omitted. do.

And the air conditioning device of the present invention includes a control unit (10).

The control unit 10 serves as a “discharge air temperature sensor detection error determination unit” that determines the detection error of the discharge air temperature sensor 24 together with the vehicle interior discharge air temperature prediction unit 40. Occurs when the air discharge vent 30 is closed by comparing the predicted temperature of the discharge air inside the vehicle input from the discharge air temperature prediction unit 40 with the discharge air temperature inside the vehicle input from the discharge air temperature sensor 24. Determine the detection error of the discharge air temperature sensor (24).

In addition, the control unit 10 determines the difference between the predicted temperature of the discharge air inside the vehicle interior of the vehicle interior discharge air temperature prediction unit 40 and the discharge air temperature sensor 24, depending on whether the discharge air temperature sensor 24 has a detection error. It is configured to selectively use any one of the indoor discharge air temperatures.

To explain this in more detail, as shown in FIG. 4, the control unit 10 receives the input from the vehicle interior discharge air temperature prediction unit 40 when the air conditioning device is turned on (S101). The predicted temperature of the vehicle interior discharge air is compared with the vehicle interior discharge air temperature input from the discharge air temperature sensor 24, and a temperature deviation between the two is calculated (S103).

And when the temperature deviation between the predicted temperature of the discharged air inside the vehicle interior and the discharged air temperature inside the vehicle interior is calculated, the control unit 10 determines whether the calculated temperature deviation is greater than or equal to the preset reference temperature deviation value (S105).

As a result of the determination, if it is greater than the reference temperature deviation value, it is determined that an error has occurred in the vehicle interior discharge air temperature data currently input from the discharge air temperature sensor 24.

In particular, since the grill 32 on the air discharge vent 30 side is closed, the discharge air temperature sensor 24 cannot accurately detect the air discharge temperature in the vehicle interior, and as a result, the discharge air temperature sensor 24 It is determined that an error occurred in the vehicle interior discharge air temperature data entered in ).

When this determination is made, the control unit 10 excludes the vehicle interior air discharge temperature data input from the discharge air temperature sensor 24 and uses the vehicle interior discharge air temperature input from the vehicle interior discharge air temperature prediction unit 40. The predicted temperature is recognized as the actual vehicle interior discharge air temperature (S107).

Accordingly, the air conditioning device is controlled based on the predicted temperature of the vehicle interior discharge air of the vehicle interior discharge air temperature prediction unit 40.

Meanwhile, as a result of the determination in step (S105), if it is not greater than the reference temperature deviation value (S105-1), that is, if it is less than the standard temperature deviation value, the control unit 10 determines that the discharge air temperature sensor 24 is It is judged that the discharge temperature is detected normally.

When this determination is made, the control unit 10 excludes the cabin air discharge predicted temperature input from the cabin discharge air temperature prediction unit 40 and replaces the cabin discharge air temperature input from the cabin discharge air temperature sensor 24. is recognized as the actual vehicle interior discharge air temperature (S109).

Therefore, the air conditioning system is controlled based on the discharge air temperature inside the vehicle interior of the discharge air temperature sensor 24.

[Second Embodiment]

Next, Figures 5 and 6 show drawings showing a second embodiment of a vehicle air conditioning system according to the present invention.

The air conditioning device of the second embodiment further includes an air discharge vent opening/closing detection unit 50 for detecting whether each air discharge vent 30 on which the discharge air temperature sensor 24 is installed is open or closed.

The air discharge vent opening/closing detection unit 50 is composed of a detection sensor that detects the rotation angle of the blade 32a of the grill 32 (see FIG. 2) of each air discharge vent 30.

This air discharge vent opening/closing detection unit 50 detects the opening/closing of each air discharge vent 30 by detecting the rotation angle of the blade 32a of the grill 32.

Meanwhile, the sensing data of the air discharge vent opening/closing detection unit 50 is input to the control unit 10. At this time, the control unit 10 detects each air discharge vent input from the air discharge vent opening/closing detection unit 50 ( Depending on whether the air discharge vent (30) is opened or closed, the detection error of the discharge air temperature sensor (24) that occurs when the air discharge vent (30) is closed is determined.

In addition, the control unit 10 determines whether the discharge air temperature sensor 24 has a detection error, and calculates the predicted temperature of the discharge air inside the vehicle interior, input from the interior discharge air temperature prediction unit 40, and the discharge air temperature sensor 24. ) is configured to selectively use one of the vehicle interior discharge air temperatures entered in ).

To explain this in more detail, as shown in FIG. 6, the control unit 10 detects the input from the air discharge vent opening/closing detection unit 50 when the air conditioning device is turned on (S201). Through the data, it is determined whether each air discharge vent 30 where the discharge air temperature sensor 24 is installed is open (S203).

As a result of the determination, if all of the air discharge vents 30 are open, the control unit 10 determines that each discharge air temperature sensor 24 is operating normally, and according to this judgment, each discharge air temperature sensor 24 The vehicle interior discharge air temperature data entered in is recognized as the actual vehicle interior discharge air temperature (S205).

Therefore, the air conditioning system is controlled based on the vehicle interior discharge air temperature data from the discharge air temperature sensor 24.

Meanwhile, as a result of the determination in step (S203), if all of the air discharge vents 30 are not open (S203-1), the control unit 10 operates each air discharge vent ( 30), determine again whether all are closed (S205).

As a result of the determination, if all air discharge vents 30 are closed, the control unit 10 determines that an error has occurred in all of the vehicle interior discharge air temperature data input from each discharge air temperature sensor 24.

In particular, since the grills 32 of the corresponding air discharge vents 30 are all closed, the discharge air temperature sensors 24 cannot accurately detect the air discharge temperature inside the vehicle, and as a result, the discharge air temperature sensor 24 ), it is determined that an error occurred in the vehicle interior discharge air temperature data entered.

And when this determination is made, the control unit 10 excludes the vehicle interior air discharge temperature data input from each discharge air temperature sensor 24 and the interior discharge air temperature data input from the vehicle interior discharge air temperature prediction unit 40. The predicted air temperature is recognized as the actual vehicle interior discharge air temperature (S207).

Accordingly, the air conditioning device is controlled based on the predicted temperature of the vehicle interior discharge air of the vehicle interior discharge air temperature prediction unit 40.

Meanwhile, as a result of the determination in step (S205), if all of the air discharge vents 30 are not closed (S205-1), that is, if any one of the air discharge vents 30 is open, the control unit 10 recognizes the vehicle interior discharge air temperature data input from the discharge air temperature sensor 24 on the open air discharge vent 30 among the air discharge vents 30 as the actual vehicle interior discharge air temperature ( S209).

Therefore, the air conditioning system is controlled based on the discharge air temperature data in the vehicle interior from the discharge air temperature sensor 24 on the open air discharge vent 30 side.

[Third Embodiment]

Next, Figures 7 and 8 show drawings showing a third embodiment of a vehicle air conditioning system according to the present invention.

As shown in FIG. 7, the air conditioning device of the third embodiment is for a dual-type structure that independently cools and heats the driver's seat and passenger's seat in the vehicle interior, and includes a driver's seat and passenger seat set temperature detection unit 60. do.

The driver's seat and passenger seat set temperature detection unit 60 includes driver's seat and passenger seat temperature control switches (not shown).

When the user sets the temperature of the driver's seat and the passenger seat through the driver's seat and passenger seat temperature control switches, the driver's seat and passenger seat set temperature detection unit 60 inputs the set temperature of the driver's seat and passenger seat to the control unit 10.

The driver's seat and passenger seat set temperature detection unit 60 may include a sync switch (not shown) that can set the set temperature of the driver's seat and the passenger seat to be the same.

Meanwhile, the control unit 10 determines the driver's seat and passenger seat set temperatures input from the driver's seat and passenger seat set temperature detection unit 60 and the open/close status of each air discharge vent 30 input from the air discharge vent opening/closing detection unit 50. Accordingly, it is configured to selectively use either the predicted vehicle interior discharge air temperature input from the vehicle interior discharge air temperature prediction unit 40 and the vehicle interior discharge air temperature input from the discharge air temperature sensor 24. do.

To explain this in more detail, as shown in FIG. 8, the control unit 10 detects the input from the air discharge vent opening/closing detection unit 50 when the air conditioning device is turned on (S301). Through the data, it is determined whether each air discharge vent 30 where the discharge air temperature sensor 24 is installed is open (S303).

As a result of the determination, if all air discharge vents 30 are open, the control unit 10 determines that each discharge air temperature sensor 24 is operating normally, and according to this judgment, each discharge air temperature sensor 24 The input vehicle interior discharge air temperature data is recognized as the actual vehicle interior discharge air temperature (S305).

Therefore, the air conditioning system is controlled based on the vehicle interior discharge air temperature data from the discharge air temperature sensor 24.

Meanwhile, as a result of the determination in step (S303), if all of the air discharge vents 30 are not open (S303-1), the control unit 10 operates each air discharge vent ( 30), determine again whether all are closed (S305).

As a result of the determination, if all air discharge vents 30 are closed, the control unit 10 determines that an error has occurred in all of the vehicle interior discharge air temperature data input from each discharge air temperature sensor 24.

In particular, since the grills 32 of the corresponding air discharge vents 30 are all closed, the discharge air temperature sensors 24 cannot accurately detect the air discharge temperature inside the vehicle, and as a result, the discharge air temperature sensor 24 ), it is determined that an error occurred in the vehicle interior discharge air temperature data entered.

And when this determination is made, the control unit 10 excludes the vehicle interior air discharge temperature data input from each discharge air temperature sensor 24 and the interior discharge air temperature data input from the vehicle interior discharge air temperature prediction unit 40. The predicted air temperature is recognized as the actual vehicle interior discharge air temperature (S307).

Accordingly, the air conditioning system is controlled based on the predicted temperature of the vehicle interior discharge air of the vehicle interior discharge air temperature prediction unit 40.

Meanwhile, as a result of the determination in step (S305), if each air discharge vent 30 is not closed (S305-1), the control unit 10 detects the data input from the driver's seat and passenger seat set temperature detection unit 60. Through the data, it is determined whether the set temperature of the driver's seat and the passenger seat are the same (S309).

As a result of the determination, if the set temperatures of the driver's seat and the passenger seat are the same, the control unit 10 determines the temperature difference input from the discharge air temperature sensor 24 on the open air discharge vent 30 among the air discharge vents 30. The indoor discharge air temperature data is recognized as the actual interior discharge air temperature (S311).

Accordingly, the temp door 20 in the relevant air conditioning area is controlled based on the discharge air temperature data inside the vehicle interior from the discharge air temperature sensor 24 on the open air discharge vent 30 side.

Meanwhile, as a result of the determination in step (S309), if the set temperatures of the driver's seat and the passenger seat are not the same (S309-1), that is, if the set temperatures of the driver's seat and the passenger seat are different, the control unit 10 controls each discharge air temperature sensor. The vehicle interior air discharge temperature data input at (24) is excluded, and the vehicle interior discharge air temperature predicted temperature input from the vehicle interior discharge air temperature prediction unit 40 is recognized as the actual vehicle interior discharge air temperature (S313).

Accordingly, the air conditioning system is controlled based on the predicted temperature of the vehicle interior discharge air of the vehicle interior discharge air temperature prediction unit 40.

According to the air conditioning device of the third embodiment having this structure, even in the individual structure that independently cools and heats each air conditioning area (driver's seat, passenger's seat), there is a detection error in the discharge air temperature in the vehicle interior due to the closing of the air discharge vent 30. Regardless, the actual vehicle interior discharge air temperature can be reflected.

Therefore, regardless of the individual cooling and heating structure, it is possible to prevent a detection error in the discharge air temperature in the vehicle interior due to the closing of the air discharge vent 30 and an operation error in the air conditioning system resulting therefrom.

[Embodiment 4]

Next, Figures 9 and 10 show drawings showing a fourth embodiment of a vehicle air conditioning system according to the present invention.

The air conditioning device of the fourth embodiment includes a control unit 10, where the control unit 10, like the first embodiment, predicts the vehicle interior discharge air temperature predicted from the vehicle interior discharge air temperature prediction unit 40. By comparing the vehicle interior discharge air temperature input from the discharge air temperature sensor 24, a detection error of the discharge air temperature sensor 24 that occurs when the air discharge vent 30 is closed is determined.

And, if it is determined that there is a detection error in the discharge air temperature sensor 24, the control unit 10 limits the upper and lower limits of the operating range of the Temp door 20 through the pre-built Temp door upper and lower limit calculation logic 70. It is configured to do so.

In particular, the upper and lower limits of the operating range of the Temp Door (20) are calculated through the Temp Door upper and lower limit calculation logic 70, and the upper and lower limits of the operating range of the Temp Door (20) are calculated based on the calculated upper and lower limits. limit. This prevents the temp door 20 from being excessively controlled beyond preset upper and lower limits.

To explain this in more detail, as shown in FIG. 10, the control unit 10 receives the input from the vehicle interior discharge air temperature prediction unit 40 when the air conditioning device is turned on (S401). The predicted temperature of the vehicle interior discharge air is compared with the vehicle interior discharge air temperature input from the discharge air temperature sensor 24, and a temperature deviation between the two is calculated (S403).

And when the temperature deviation between the predicted temperature of the discharged air inside the vehicle interior and the discharged air temperature inside the vehicle interior is calculated, the control unit 10 determines whether the calculated temperature deviation is greater than or equal to the preset reference temperature deviation value (S405).

As a result of the determination, if it is greater than the reference temperature deviation value, it is determined that an error has occurred in the vehicle interior discharge air temperature detection data currently input from the discharge air temperature sensor 24 (S407).

In particular, since the grill 32 on the air discharge vent 30 side is closed, the discharge air temperature sensor 24 cannot accurately detect the air discharge temperature in the vehicle interior, and as a result, the discharge air temperature sensor 24 It is determined that an error occurred in the vehicle interior discharge air temperature detection data entered in ).

When this determination is made, the control unit 10 enters the Tempdoor upper and lower limit limit mode (S409) and operates the Tempdoor 20 through the pre-built Tempdoor upper and lower limit calculation logic 70. Calculate the upper and lower limits of the range (S411).

Here, the temp door upper and lower limit calculation logic 70 calculates the vehicle's status and driving conditions, for example, factors such as engine speed (RPM), engine coolant temperature, internal and external air mode status, vehicle speed, user-set temperature, etc. It is configured to calculate the upper and lower limits of the operating range of the Temp door 20 by processing them.

In some cases, the Tempdoor upper and lower limit calculation logic 70 may calculate upper and lower limits of a size that limits the Tempdoor 20 by a preset angle in both directions from the current position.

Meanwhile, when the calculation of the upper and lower limits of the operating range of the TEMP door 20 is completed, the control unit 10 determines the operating range of the TEMP door 20 based on the calculated upper and lower limits of the operating range of the TEMP door 20. Limit the upper and lower limits (S411).

Then, as shown in FIG. 11, despite the interior discharge air temperature detection error (A) of the discharge air temperature sensor 24 that occurs when the air discharge vent 30 is closed, the Temp door 20 The opening amount (B) is not controlled in an excessive range (C) as in the prior art, but is controlled in a range (D) within limited upper and lower limits.

In particular, in the case of the prior art, since the upper and lower limit ranges (C) of the opening amount of the temp door (20) are at their maximum, a detection error (A) in the discharge air temperature in the vehicle interior occurs due to the closing of the air discharge vent (30). In this case, the opening amount of the temp door 20 cannot help but be excessively controlled within the maximum upper and lower limit range (C).

And because of this control structure, the prior art is such that when an error in detecting the discharge air temperature in the vehicle interior (A) occurs due to the closing of the air discharge vent 30, the actual discharge air temperature in the vehicle interior (E) may change rapidly. There is no choice but to do this, and as a result, the comfort inside the car is significantly reduced.

However, in the present invention, when a detection error (A) of the discharge air temperature in the vehicle interior occurs due to the closing of the air discharge vent (30), a small amount is detected within the upper and lower limit values (D), which are small limited to a preset range in the maximum state. Therefore, despite the detection error (A) of the discharge air temperature inside the vehicle, the actual discharge air temperature (E) inside the vehicle maintains a relatively constant temperature.

Therefore, despite the detection error (A) of the discharge air temperature inside the vehicle interior due to the closing of the air discharge vent 30, the discharge air temperature (E) inside the vehicle interior is prevented from sudden temperature change, and as a result, the temperature inside the vehicle interior decreases. maintains comfortable conditions.

According to the present invention configured as described above, when a detection error occurs in the discharge air temperature in the vehicle interior of the discharge air temperature sensor 24 due to the closing of the air discharge vent 30, the previously predicted discharge air temperature in the vehicle interior is changed to the actual difference. Since the structure recognizes the indoor discharge air temperature, the actual vehicle interior discharge air temperature can be reflected regardless of the interior discharge air temperature detection error that occurs when the air discharge vent 30 is closed.

In addition, regardless of the error in detecting the discharge air temperature in the vehicle interior that occurs when the air discharge vent (30) is closed, the actual discharge air temperature in the vehicle interior can be reflected, so the temperature in the vehicle interior due to the closure of the air discharge vent (30) can be reflected. Despite discharge air temperature detection errors, the temperature inside the vehicle can be accurately controlled.

In addition, regardless of the error in detecting the discharge air temperature in the vehicle interior due to the closing of the air discharge vent 30, the actual discharge air temperature in the vehicle interior can be reflected, so frequent discharge in the vehicle interior under the closed condition of the air discharge vent 30 When the air temperature changes, the actual discharge air temperature inside the vehicle can be accurately reflected despite frequent changes in the discharge air temperature inside the vehicle.

In addition, despite frequent changes in vehicle interior discharge air temperature, the actual vehicle interior discharge air temperature can be accurately reflected, so the temperature in the vehicle interior is precisely controlled to the target discharge temperature regardless of frequent changes in vehicle interior discharge air temperature. This can be done, and through this, the comfort inside the car can be improved.

In addition, among the plurality of discharge air temperature sensors 24, when a specific discharge air temperature sensor 24 causes a detection error due to the closing of the air discharge vent 30, the discharge from the non-closed air discharge vent 30 is discharged. Since the detection data of the air temperature sensor 24 is recognized as the actual vehicle interior discharge air temperature and is reflected, it is possible to prevent detection errors of the specific discharge air temperature sensor 24 due to the closing of the specific air discharge vent 30 and , it is possible to prevent operational errors in the air conditioning system.

In addition, it is possible to prevent detection errors in the specific discharge air temperature sensor 24 due to the closing of the specific air discharge vent 30 and operation errors in the air conditioning system resulting from the detection errors in the specific discharge air temperature sensor 24. This can prevent the deterioration of the fit inside the car interior.

In addition, when an error occurs in detecting the discharge air temperature in the vehicle interior by the discharge air temperature sensor 24 due to the closing of the air discharge vent 30, the structure limits the upper and lower limits of the opening amount of the temp door 20, so the air discharge When an error occurs in detecting the discharge air temperature in the vehicle interior due to the closing of the vent 30, a sudden change in the opening amount of the temp door 20 can be prevented.

In addition, when a detection error occurs in the discharge air temperature inside the vehicle due to the closing of the air discharge vent 30, a sudden change in the opening amount of the temp door 20 can be prevented, so the difference in temperature due to the closing of the air discharge vent 30 can be prevented. When an indoor discharge air temperature detection error occurs, rapid temperature changes in the air discharged into the vehicle interior can be prevented, and through this, the comfort inside the vehicle interior can be improved.

In the above, preferred embodiments of the present invention have been described by way of example, but the scope of the present invention is not limited to these specific embodiments, and may be appropriately modified within the scope stated in the claims.

1: Outdoor sensor 3: In-car sensor
5: Solar radiation sensor 7: Temperature control switch (Switch)
10: Control unit 12: Air conditioner
14: Heater 16: Blower
18: Intake Door 20: Temp. Door
22: Mode Door 24: Discharge air temperature sensor (Sensor)
30: Air discharge vent (Vent) 32: Grill (Grill)
32a: Blade 40: Vehicle interior discharge air temperature prediction unit
50: Air discharge vent opening/closing detection unit 60: Driver's seat, passenger seat set temperature detection unit
70: Tempdoor upper and lower limit calculation logic (Logic)

Claims (5)

In the vehicle air conditioning system that variably controls the position of the temp door according to the target discharge temperature calculated in advance and the discharge air temperature in the vehicle interior of the discharge air temperature sensor installed on the air discharge vent side,
Determining a detection error in the discharge air temperature inside the vehicle by the discharge air temperature sensor using preset logic;
As a result of the judgment, when there is a detection error in the discharge air temperature inside the vehicle, the upper and lower limits of the operating range of the Temp door are limited from the maximum state to a small preset range, preventing the Temp door from being excessively controlled beyond the limited upper and lower limits. An air conditioning device for a vehicle, characterized in that it includes a control unit that prevents. According to clause 1,
The control unit,
In case of a detection error in the discharge air temperature inside the vehicle, the upper and lower limits of the operating range of the TEMP door are calculated using preset logic, and the operating range of the TEMP door is limited based on the calculated upper and lower limits. Device. According to clause 1,
The control unit,
When there is a detection error in the discharge air temperature inside the vehicle, the upper and lower limits of the TEMP door are calculated in both directions from the current position, and the operating range of the TEMP door is limited based on this. Air conditioning equipment. According to any one of claims 1 to 3,
The control unit,
An air conditioning system for a vehicle, characterized in that it determines a detection error in the discharge air temperature in the vehicle interior of the discharge air temperature sensor that occurs when the air discharge vent is closed. According to clause 4,
The control unit,
Calculate the temperature difference between the predicted temperature of the vehicle interior discharge air obtained through preset logic and the vehicle interior discharge air temperature input from the discharge air temperature sensor,
If the temperature deviation is more than a preset reference temperature deviation value, it is determined that the air discharge vent in which the discharge air temperature sensor is installed is closed and the air discharge temperature in the vehicle interior of the discharge air temperature sensor has a detection error,
If the temperature deviation is less than the reference temperature deviation value, the air discharge vent on which the discharge air temperature sensor is installed is opened, and it is determined that the discharge air temperature sensor normally detects the air discharge temperature in the vehicle interior.

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