KR102619400B1 - Air conditioning system for automotive vehicles - Google Patents

Abstract

The present invention relates to an air conditioning system for a vehicle. When entering the air discharge mode toward the window glass during cooling mode, the "cool air discharge amount" to the window glass portion is limited, thereby preventing the outside of the vehicle cabin from being exposed to the "cold air discharge" to the window glass portion. The purpose is to prevent "window window fogging phenomenon" in the area, prevent sudden temperature changes inside the vehicle interior, and at the same time efficiently prevent "window window fogging phenomenon" on the outside of the vehicle interior.
In order to achieve this purpose, the present invention provides a Temp. Door that controls the discharge air temperature in the vehicle interior by adjusting the opening amount of the cold air passage and the hot air passage, and a mode door that controls the air discharge mode in the vehicle interior. In a vehicle air conditioning system including (Mode Door), when the mode for discharging air to the window glass part is selected under cooling conditions in the vehicle interior, if the temperature of the evaporator is below the preset reference temperature, the temp for the cold air passage The maximum opening amount of the door is variably controlled, but through preset logic, the probability of fogging on the window glass outside the cabin due to cold air discharge from the window glass is determined, and the temp for the cold air passage is adjusted according to the determined probability of fogging on the window glass outside the cabin. It is equipped with a control unit that actively and variably controls the maximum opening amount of the door.

Description

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

The present invention relates to an air conditioning device for a vehicle, and more specifically, when entering the air discharge mode toward the window glass during cooling mode, the "cool air discharge amount" to the window glass portion is limited, thereby discharging "cold air" to the window glass portion. This relates to a vehicle air conditioning system that prevents "window window fogging phenomenon" on the outside of the vehicle interior due to "window window fogging phenomenon" and prevents sudden temperature changes inside the vehicle interior, while also efficiently preventing "window window fogging phenomenon" on the exterior portion of the vehicle interior.

Cars are equipped with air conditioning systems that cool and heat the interior of the car. As shown in FIG. 1, this air conditioning device is equipped with an air conditioning case 10, which includes a Temp. Door 12 that controls the temperature of the discharged air, and an air discharge unit. Mode doors 20 that control the direction are installed.

The temp door 12 is installed at the branch point of the cold air passage 12a and the warm air passage 12b, and rotates between the cold air passage 12a and the warm air passage 12b to connect the cold air passage 12a and the warm air passage (12b). Adjust the opening amount in 12b). Therefore, the temperature of the air discharged into the vehicle interior is controlled.

The mod doors 20 include a def. door 22, a vent door 24, and a floor door 26, and these mod doors 20 are organically connected to each other. It operates to adjust the discharge mode of air discharged into the vehicle interior.

For example, the air discharge mode is controlled in "Vent Mode" in the direction of the passenger's face, or in "Bi-Level Mode" in the direction of the passenger's face and the floor of the vehicle interior, or Controlled by “Floor Mode” on the interior floor, or “Mix Mode” on the window glass and interior floor, or “Def. Mode” on the window glass. Control with

However, in this conventional air conditioning device, in the “cooling mode”, when the mode doors 20 are switched to a mode that discharges air to the window glass portion, for example, when switched to the “deep mode”, the window glass Low-temperature cold air begins to blow to the side part, but at this time, if the temperature of the air blown to the window glass part is too low, there is a disadvantage in that a "fogging phenomenon" occurs on the corresponding outer window glass part of the cabin.

Also, due to these shortcomings, there is a problem that it interferes with the driver's visibility, and as a result, it is pointed out that safe driving is greatly hindered while driving.

Meanwhile, in consideration of this, technology is being developed to prevent "fogging" of the window glass outside the cabin when entering the "diff mode" during the "cooling mode".

In this technology, in the “cooling mode” state, when the mode doors 20 are switched to the “diff mode” position, the temperature of the evaporator 30 is set to a preset “reference temperature”, for example, “10°C.” If it is below, the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a is limited to a preset value.

For example, if the maximum opening amount of the temp door 12 with respect to the cold air passage 12a before entering the “deep mode” is 100%, the temp door 12 with respect to the cold air passage 12a after entering the “deep mode” is 100%. The maximum opening amount is limited to 70%.

Accordingly, excessive opening of the cold air passage 12a is blocked, thereby preventing excessive discharge of cold air to the window glass side. This prevents “fogging” of the window glass outside the cabin.

However, this conventional technology has the disadvantage of being operated based only on the temperature of the evaporator 30 without taking this into account, even though the time and degree of fogging on the window glass outside the cabin are different depending on the outdoor temperature conditions. there is.

In particular, when the outside temperature is low, even if cold air is discharged to the window glass side, "fogging" does not occur on the corresponding outer window glass part of the cabin, or the degree is slight. Nevertheless, this is not taken into consideration and the evaporator 30 is unconditionally used. It has the disadvantage of operating only based on temperature.

In addition, due to this disadvantage, when entering the "diff mode", the maximum opening amount of the temp door 12 with respect to the cold air passage 12a is excessively limited even though "fogging" does not occur or is only slight on the window glass outside the cabin. There is a problem.

And because of this problem, there is a drawback that the temperature of the air discharged into the vehicle interior changes rapidly.

In particular, in the process of limiting the maximum opening amount of the temp door 12, the maximum opening amount of the temp door 12 is limited from about 100% to 70%, and during this limiting process, the temperature of the air discharged into the vehicle interior changes rapidly. However, it is pointed out that because of this drawback, the comfort inside the car is significantly reduced.

The present invention was devised to solve the above-described conventional problems, and its purpose is to variably control the maximum opening amount of the temp door to the cold air passage in consideration of the outdoor temperature conditions when entering the deep mode during the cooling mode. By doing so, the aim is to provide an air conditioning system for a vehicle that can respond more precisely to the timing and degree of fogging on the outer window glass portion of the vehicle cabin, which varies depending on external temperature conditions.

Another object of the present invention is to provide a more detailed response to the timing and degree of fogging of the window glass outside the cabin, which varies depending on the outdoor temperature conditions, so that the fogging of the window glass outside the cabin that occurs when entering the diff mode during the cooling mode is configured to respond in more detail. The goal is to provide a vehicle air conditioning system that can respond more efficiently to “fogging” of the vehicle.

Another object of the present invention is to variably control the maximum opening amount of the temp door to the cold air passage in consideration of the outdoor temperature conditions when entering the deep mode during the cooling mode, thereby reducing the outside air temperature when entering the deep mode during the cooling mode. The purpose of the present invention is to provide an air conditioning system for a vehicle that can more precisely control the maximum opening amount of the temperature door for the cold air passage in response to the time and degree of fogging on the outer window window of the vehicle cabin, which varies depending on the temperature.

Another object of the present invention is to configure the maximum opening amount of the temp door for the cold air passage to be precisely controlled in response to the time and degree of fogging of the outer window glass portion of the cabin, which varies depending on the outside temperature. As such, the object is to provide an air conditioning device for a vehicle that can prevent the maximum opening amount of the temp door from being excessively limited when entering the deep mode during the cooling mode.

Another object of the present invention is to prevent the maximum opening amount of the TEMP door from being excessively limited when entering the Diff mode during the cooling mode, thereby reducing the discharge air temperature in the vehicle interior due to excessive limitation of the maximum opening amount of the TEMP door. The goal is to provide an air conditioning system for vehicles that can prevent rapid changes and thereby improve comfort inside the vehicle.

In order to achieve this purpose, the vehicle air conditioning device according to the present invention includes a Temp. Door that controls the discharge air temperature in the vehicle interior by adjusting the opening amounts of the cold air passage and the hot air passage, and air discharge in the vehicle interior. In a vehicle air conditioning system including mode doors that control modes, when the mode for discharging air to the window glass is selected under cooling conditions in the vehicle interior, if the temperature of the evaporator is below the preset reference temperature, , variably controls the maximum opening amount of the temp door for the cold air passage, determines the probability of fogging on the window glass outside the cabin due to the discharge of cold air on the window glass through preset logic, and determines the probability of fogging on the window glass on the outside of the cabin. It is characterized in that it includes a control unit that actively and variably controls the maximum opening amount of the temp door with respect to the cold air passage.

Preferably, the control unit calculates the temperature deviation between the outside air temperature and the window glass surface temperature using the [calculation equation] below, and determines the probability of fogging on the window glass portion outside the cabin through the calculated temperature deviation value between the two. Do it as

[Operation formula]

Temperature deviation (℃) = outside temperature (℃) - window glass surface temperature (℃)

And the control unit, if there is no temperature deviation between the outside air temperature and the window glass surface temperature, or if there is a temperature deviation between the outside air temperature and the window glass surface temperature, but the outside air temperature is lower than the window glass surface temperature and the temperature deviation between the two is a negative temperature value (-℃), It is judged that there is no possibility of fogging occurring on the window glass outside the cabin, and if there is a temperature deviation between the outside air temperature and the window glass surface temperature, but the outside air temperature is higher than the window glass surface temperature and the temperature deviation between the two is a positive temperature value (+℃), the window glass outside the cabin is It is characterized by determining that there is a probability of fogging of the area.

The control unit is characterized in that it determines that the temperature deviation between the outside air temperature and the window glass surface temperature is a positive temperature value (+°C), and that the larger the size, the higher the probability of fogging on the window glass portion outside the cabin.

In addition, when the control unit determines that there is no probability of fogging of the window glass outside the cabin, the control unit maintains the maximum opening amount of the temperature door for the cold air passage at the current state; If it is determined that there is a possibility of fogging of the window glass outside the cabin, the maximum opening amount of the temperature door 12 with respect to the cold air passage is variably controlled according to the temperature difference between the outside air temperature and the window glass surface temperature.

According to the vehicle air conditioning system according to the present invention, when entering the deep mode during the cooling mode, the maximum opening amount of the temperature door to the cold air passage is variably controlled in consideration of the outside air temperature and the window glass surface temperature conditions, so that the temperature is adjusted according to the outside temperature condition. It has the effect of being able to respond more precisely to the timing and degree of fogging on the outer window glass, which varies depending on the vehicle interior.

In addition, since it is possible to respond more precisely to the time and degree of fogging on the outer window glass, which varies depending on the external temperature conditions, it is more efficient to prevent "fogging" on the outer window glass of the cabin that occurs when entering the diff mode during cooling mode. There is an effect that can be responded positively.

In addition, when entering deep mode during cooling mode, the maximum opening amount of the temperature door to the cold air passage is variably controlled in consideration of the outside air temperature and window glass surface temperature conditions, so when entering deep mode during cooling mode, the outside air temperature There is an effect of controlling the maximum opening amount of the temp door to the cold air passage in more detail in response to the time and degree of fogging on the outer window glass portion of the cabin, which varies depending on the condition.

In addition, the maximum opening amount of the temperature door for the cold air passage can be controlled in detail in response to the time and degree of fogging on the window glass outside the cabin, which varies depending on the outside temperature, so that, as in the past, during cooling mode, the diff This has the effect of preventing the maximum opening amount of the temp door from being excessively limited when entering the mode.

In addition, it prevents the maximum opening amount of the TEMP door from being excessively limited when entering the Diff mode during cooling mode, thereby preventing a sudden change in the discharge air temperature inside the vehicle cabin due to excessive limitation of the maximum opening amount of the TEMP door. It works.

In addition, it is possible to prevent a sudden change in the discharge air temperature inside the vehicle interior due to an excessive limit on the maximum opening amount of the temp door, thereby improving the comfort inside the vehicle interior.

1 is a diagram showing a conventional vehicle air conditioning system;
2 is a diagram showing the configuration of a vehicle air conditioning system according to the present invention;
Figure 3 is a flow chart showing an operation example of a vehicle air conditioning system according to the present invention.

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

First, before looking at the features of the vehicle air conditioning system according to the present invention, the vehicle air conditioning system will be briefly described with reference to FIG. 2.

The air conditioning system for a vehicle includes an air conditioning case 10, and the air conditioning case 10 is equipped with a temp door 12 that controls the temperature of discharged air and a mode door 20 that controls the discharge direction of air.

The temp door 12 rotates between the cold air passage 12a and the warm air passage 12b to adjust the opening amounts of the cold air passage 12a and the warm air passage 12b. Therefore, the temperature of the air discharged into the vehicle interior is controlled.

The mode doors 20 include a diff door 22, a vent door 24, and a floor door 26, and these mode doors 20 operate organically with each other to select a discharge mode for air discharged into the vehicle interior. Adjust.

For example, the air discharge mode can be controlled in "vent mode" toward the passenger's face, or in "bi-level mode" in the direction of the passenger's face and in the interior of the vehicle, or in "floor mode" in the direction of the interior floor. Control, or control in “mix mode” of the window glass and interior floor, or control in “diff mode” in the direction of the window glass.

Next, the features of the vehicle air conditioning system according to the present invention will be described in detail with reference to FIGS. 2 and 3.

First, referring to FIG. 2, the air conditioning device of the present invention is provided with a window pane fogging occurrence probability determination unit 40 that determines the probability of fogging occurring on the window pane outside the cabin due to cold air discharge from the window pane side.

The window fogging occurrence probability determination unit 40 includes an outside temperature detection unit 42 that detects the outside air temperature outside the vehicle interior, and a window glass surface temperature detection unit 44 that detects the window glass surface temperature.

The outside temperature sensing unit 42 is a temperature sensor installed on the outside of the vehicle, and detects the outside temperature outside the vehicle.

The window glass surface temperature detection unit 44 is a temperature sensor installed on the front window glass of the vehicle and detects the temperature of the surface area of the front window glass.

Here, it is better to use existing air conditioning system temperature sensors installed in the vehicle as the temperature sensors of the outside temperature detection unit 42 and the window glass surface temperature detection unit 44. In particular, it is desirable to use the window glass side temperature sensor of a defogging device (not shown) to automatically remove fogging from the window glass as the temperature sensor of the window surface temperature detection unit 44.

Meanwhile, the window glass fogging probability determination unit 40 further includes a control unit 50.

The control unit 50 is equipped with a microprocessor, and when “outside air temperature” and “window glass surface temperature” data are input from the outside temperature detection unit 42 and the window glass surface temperature detection unit 44, the input “outside air temperature” is received. and "window glass surface temperature" are processed using the equation below to determine the probability of fogging on the window glass outside the cabin.

[Operation formula]

Temperature deviation (℃) = outside temperature (℃) - window glass surface temperature (℃)

In particular, by processing with the above [calculation equation], the temperature deviation between the “outside air temperature” input from the outside temperature detection unit 42 and the “window glass surface temperature” input from the window glass surface temperature detection unit 44 is calculated, The probability of fogging on the window glass outside the cabin is determined according to the calculated temperature difference between the two.

For example, if there is no temperature deviation between the “outside air temperature” of the outside temperature detection unit 42 and the “window glass surface temperature” of the window surface temperature detection unit 44, it is determined that there is no probability of fogging of the window glass outside the cabin. .

Additionally, there is a temperature deviation between the “outside air temperature” of the outside air temperature sensing unit 42 and the “window glass surface temperature” of the window glass surface temperature sensing unit 44, but the “outside air temperature” is lower than the “window glass surface temperature” so the temperature deviation between the two is If is a negative temperature value (-℃), it is determined that there is no possibility of fogging on the window glass outside the cabin.

Additionally, there is a temperature deviation between the “outside air temperature” of the outside air temperature detection unit 42 and the “window glass surface temperature” of the window glass surface temperature detection unit 44, but the “outside air temperature” is higher than the “window glass surface temperature” so that the temperature deviation between the two is If is a positive temperature value (+℃), it is determined that there is a possibility of fogging occurring on the window glass outside the cabin.

In particular, the temperature deviation between the “outside air temperature” and the “window glass surface temperature” is a positive temperature value (+°C), and the larger it is, the higher the probability of fogging on the window glass outside the cabin is judged to be.

Meanwhile, the control unit 50 determines in real time the probability of fogging on the window glass outside the cabin through the temperature difference between the outside air temperature and the window glass surface temperature, determines whether the air conditioner has entered the cooling mode, and determines whether the air discharge mode is in the diff mode. Monitors whether the mode has been switched to in real time.

At this time, when the air conditioner enters the cooling mode and switches to the deep mode, the control unit 50 determines whether the temperature of the evaporator 30 is below the preset “reference temperature”, for example, “10°C”. .

As a result of the determination, if it is below the “reference temperature” of the evaporator 30, the control unit 50 recognizes that the temperature of the air discharged to the window glass side is too low, and there is a risk of fogging on the corresponding outer window glass portion of the vehicle interior.

And based on this recognition, it is determined that it is necessary to limit the maximum opening amount of the temp door 12 with respect to the cold air passage 12a, and the maximum opening amount of the temp door 12 with respect to the cold air passage 12a is limited. .

At this time, the control unit 50 actively varies the maximum opening amount of the temp door 12 with respect to the cold air passage 12a according to the probability of fogging of the window glass portion outside the cabin determined through the window glass fogging occurrence probability determination unit 40. Control.

For example, as shown in [Table 1] below, if it is determined that there is no temperature deviation between the “outside air temperature” and the “window glass surface temperature” and there is no probability of fogging occurring on the window glass outside the cabin, the control unit 50 maintains the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a in its current state.

In addition, if there is a temperature deviation between the "outside air temperature" and the "window glass surface temperature", but the temperature deviation between the two is a negative temperature value (-℃), and it is determined that there is no possibility of fogging on the window glass portion outside the cabin, the control unit (50 ) maintains the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a in its current state.

Also, if there is a temperature deviation between the “outside air temperature” and the “window glass surface temperature” and the temperature deviation between the two is a positive temperature value (+°C), and it is determined that there is a possibility of fogging of the window glass portion outside the cabin, the control unit 50 , the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a is variably controlled according to the probability of fogging, that is, the temperature difference between the “outside air temperature” and the “window glass surface temperature.”

At this time, the control unit 50 operates the temp in a direction in which the maximum opening amount of the temp door 12 with respect to the cold air passage 12a gradually decreases in inverse proportion to the larger the temperature deviation between the “outside air temperature” and the “window glass surface temperature.” Controls the door (12).

This is because, as the temperature deviation between the “outside air temperature” and the “window glass surface temperature” increases, the probability of fogging on the window glass outside the cabin gradually increases. As a result, the larger the temperature deviation between the “outside air temperature” and the “window glass surface temperature”, the colder the wind. The purpose is to gradually reduce the maximum opening amount of the passage 12a and limit the amount of cold air discharged to the window glass side, thereby actively responding to the gradually increasing probability of fogging occurring on the window glass outside the cabin.

Meanwhile, the control unit 50 controls the "probability of occurrence of fogging on the outer window glass part of the cabin" as shown in [Table 1] below, that is, "temperature deviation between the outside air temperature and the window glass surface temperature", and the temp for the cold air passage 12a. The “maximum opening amount control values” of the door 12 are built-in.

Probability of fogging on the window glass outside the cabin (℃)
(Temperature deviation between outside temperature and window glass surface temperature) Maximum opening amount of Temp door for cold air passage (%) note - 20 100 No chance of fogging - 10 100 No chance of fogging 0 100 No chance of fogging 10 90 There is a possibility of fogging. 20 80 There is a possibility of fogging. 30 70 High probability of fogging occurring

Here, the control unit 50 variably controls the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a according to the temperature deviation between the outside air temperature and the window glass surface temperature, and sets the temperature deviation between the outside air temperature and the window glass surface temperature in advance. Calculation is performed at a set time interval, for example, “2 seconds”, and correspondingly, the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a is also variably controlled at 2 second intervals.

The reason for this configuration is that the outside temperature and the window glass surface temperature vary from time to time depending on the driving and driving environment, and the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a can be reflected in real time according to these variable environmental conditions. It is to ensure that

In addition, the control unit 50 variably controls the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a according to the temperature deviation between the outside air temperature and the window glass surface temperature, and controls the cooling mode condition, the diff mode condition, and , if any of the conditions below the “reference temperature” of the temperature of the evaporator 30 is not satisfied, the variable control of the maximum opening amount of the temp door 12 is stopped, and the maximum opening amount of the temp door 12 is returned to its original state. It is configured to return to .

Next, an operational example of the present invention having such a configuration will be described in detail with reference to FIGS. 2 and 3.

First, referring to FIG. 3, when the air conditioner is turned on (S101), it is determined whether the air conditioner is in the cooling mode (S103).

As a result of the determination, if it is in the cooling mode, the control unit 50 determines again whether the air discharge mode has entered the deep mode (S105).

As a result of the determination, if the deep mode has been entered, the control unit 50 determines whether the temperature of the evaporator 30 is below the “reference temperature”, for example, “10°C” (S107).

As a result of the determination, if it is below the “reference temperature”, the control unit 50 detects fogging of the window glass outside the cabin through the temperature difference between the outside air temperature of the outside air temperature detection unit 42 and the window glass surface temperature of the window surface temperature detection unit 44. Determine the probability of occurrence (S109).

And when the determination of the “probability of fogging of the window pane outside the cabin” is completed, the control unit 50 determines the “maximum Detect “measurement control value” (S111).

And when detection of the “maximum opening amount control value” of the temp door 12 for the cold air passage 12a is completed, the control unit 50 operates according to the detected “maximum opening amount control value” of the temp door 12. The maximum opening amount of the temp door 12 is variably controlled (S113).

According to the present invention with this configuration, when entering the deep mode during the cooling mode, the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a is variably controlled in consideration of the outside air temperature and the window glass surface temperature conditions. , it is possible to respond more precisely to the timing and degree of fogging on the window glass outside the cabin, which varies depending on the outdoor temperature conditions.

In addition, since it is possible to more precisely respond to the timing and degree of fogging on the window glass outside the cabin, which varies depending on the outdoor temperature conditions, it is more effective against "fogging" on the window glass outside the cabin that occurs when entering the diff mode during cooling mode. You can respond well.

In addition, when entering the deep mode during the cooling mode, the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a is variably controlled in consideration of the outdoor temperature and the window glass surface temperature conditions, so during the cooling mode, the deep mode At the time of entry, the maximum opening amount of the temp door 12 with respect to the cold air passage 12a can be precisely controlled in response to the time and degree of fogging on the window glass outside the cabin, which varies depending on the outside temperature.

In addition, the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a can be precisely controlled in response to the time and degree of fogging on the window glass outside the cabin, which varies depending on the outside temperature, so that, as in the past, , It is possible to prevent the maximum opening amount of the temp door 12 from being excessively limited when entering the deep mode during the cooling mode.

In addition, it prevents the maximum opening amount of the temp door 12 from being excessively restricted when entering the deep mode during cooling mode, thereby preventing a sudden increase in the discharge air temperature inside the vehicle cabin due to an excessive limit on the maximum opening amount of the temp door 12. Change can be prevented.

In addition, it is possible to prevent a sudden change in the discharge air temperature inside the vehicle interior due to excessive limitation of the maximum opening amount of the temp door 12, thereby improving comfort within the vehicle interior.

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.

10: Air conditioning case (Case) 12: Temp. Door
12a: cold air passage 12b: warm air passage
20: Mode Door 22: Def. Door
22a: Def. Vent 24: Vent Door
30: Evaporator 40: Window glass fogging probability determination unit
42: Outside temperature detection unit 44: Window glass surface temperature detection unit
50: control unit

Claims (8)

A Temp. Door (12) that controls the discharge air temperature in the vehicle interior by adjusting the opening amount of the cold air passage (12a) and the warm air passage (12b), and a mode door (12) that controls the air discharge mode in the vehicle interior ( In the vehicle air conditioning system including Mode Door (20),
When the mode for discharging air to the window glass is selected under cooling conditions in the vehicle interior, if the temperature of the evaporator is below the preset reference temperature, the maximum opening amount of the temp door 12 with respect to the cold air passage 12a is set to Variable control,
Through preset logic, the probability of fogging on the window glass outside the cabin due to cold air discharge from the window glass side is determined, and the maximum temperature of the temp door 12 for the cold air passage 12a is determined according to the determined probability of fogging on the window glass outside the cabin. It includes a control unit 50 that actively and variably controls the opening amount,
The control unit 50,
The temperature deviation between the outside air temperature and the window glass surface temperature is calculated using the [calculation formula] below, and the probability of fogging on the window glass outside the cabin is determined through the calculated temperature deviation value between the two.
[Operation formula]
Temperature deviation (℃) = outside temperature (℃) - window glass surface temperature (℃)
The control unit 50,
If it is determined that there is no possibility of fogging of the window glass outside the cabin, the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a is maintained at the current state;
If it is determined that there is a possibility of fogging of the window glass outside the cabin, the maximum opening amount of the temperature door 12 with respect to the cold air passage 12a is variably controlled according to the temperature difference between the outside air temperature and the window glass surface temperature,
The control unit 50,
For a vehicle, the temp door (12) is controlled in such a way that the maximum opening amount of the temp door (12) with respect to the cold air passage (12a) gradually decreases in inverse proportion to the larger the temperature deviation between the outside air temperature and the window glass surface temperature. Air conditioning equipment. delete According to clause 1,
The control unit 50,
If there is no temperature difference between the outside air temperature and the window glass surface temperature, or there is a temperature difference between the outside air temperature and the window glass surface temperature, but the outside air temperature is lower than the window glass surface temperature and the temperature difference between the two is a negative temperature value (-℃), the outer window glass part of the cabin is It was determined that there was no possibility of fogging occurring,
If there is a temperature deviation between the outside air temperature and the window glass surface temperature, and the outside air temperature is higher than the window glass surface temperature and the temperature deviation between the two is a positive temperature value (+℃), it is characterized in that it is determined that there is a probability of fogging of the window glass portion outside the cabin. Vehicle air conditioning system. According to clause 3,
The control unit 50,
An air conditioning system for a vehicle, characterized in that the temperature deviation between the outside air temperature and the window glass surface temperature is a positive temperature value (+℃), and the larger the size, the higher the probability of fogging on the window glass outside the vehicle interior. delete delete According to clause 1,
The control unit 50,
The temperature deviation between the outside air temperature and the window glass surface temperature is calculated in real time at preset time intervals, and the maximum opening amount of the temperature door 12 for the cold air passage 12a is also variable controlled in real time at preset intervals according to the realtime calculated temperature deviation. So,
An air conditioning device for a vehicle, characterized in that the maximum opening amount of the temperature door (12) for the cold air passage (12a) is variably controlled in real time in response to the temperature difference between the outside temperature and the window glass surface temperature, which varies in real time. According to any one of paragraphs 1, 3, 4, and 7,
The control unit 50,
The maximum opening amount of the temp door 12 with respect to the cold air passage 12a is variably controlled according to the probability of fogging of the window glass portion outside the cabin, while the cooling mode conditions, the deep mode conditions, and the temperature of the evaporator 30 are adjusted. If any of the conditions below the reference temperature is not satisfied, the variable control of the maximum opening amount of the temp door 12 is stopped and the maximum opening amount of the temp door 12 is returned to its original state. Air conditioning equipment.

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