KR20130022472A - Air conditioning system for automotive vehicle - Google Patents

Abstract

PURPOSE: A vehicle air conditioner is provided to calculate an air discharge volume to a vehicle indoor space with consideration for factors changing the air discharge volume to the vehicle indoor space, thereby accurately sensing an actual air discharge volume to the vehicle indoor space. CONSTITUTION: A vehicle air conditioner comprises a PTC(Positive Temperature Coefficient) heater, a blower(9), a control unit(50), a sensing member(30), and an air discharge volume calculating unit(40). The PTC heater is installed in a hot air passage(10a) of an air conditioning case(1). The blower inhales indoor air and outdoor air, thereby blowing the same to the hot air passage. The sensing member senses factors influencing to an air discharge volume to a vehicle indoor space. The air discharge volume calculating unit corrects an air discharge volume of the blower by using the factors influencing to the air discharge volume input by the sensing member, thereby calculating an actual air discharge volume to the vehicle indoor space. The control unit controls the heat radiation of the PTC heater based on the air discharge volume calculated by the air discharge volume calculating unit. [Reference numerals] (20) Blower stage detecting unit; (30) Air discharge volume influencing factor detecting unit; (32) Exterior air mode detecting unit; (34) Vehicle speed detecting unit; (36) Air discharge mode detecting unit; (38) Temp door opening degree detecting unit; (40) Air discharge volume calculating unit; (42) First memory unit; (44) Second memory unit; (45) Third memory unit; (47) Fourth memory unit; (48) Detecting unit; (49) Calculating unit; (50) Control unit; (52) Memory unit

Description

Automotive air conditioning unit {AIR CONDITIONING SYSTEM FOR AUTOMOTIVE VEHICLE}

The present invention relates to a vehicle air conditioner, and more particularly, to control the PTC heater in accordance with the amount of air discharged into the vehicle interior, to precisely control the PTC heater in consideration of various factors affecting the amount of air discharged in the vehicle interior The present invention relates to a vehicle air conditioner that can prevent unnecessary operation of the PTC heater and control the temperature inside the vehicle more precisely and comfortably.

Hybrid vehicles or electric vehicles cannot use the engine coolant or obtain the engine coolant for heating because the use of the engine is limited or the engine is not used.

Therefore, the air conditioner of a hybrid vehicle or an electric vehicle (hereinafter referred to as "vehicle") employs a heating apparatus capable of heating the interior of a vehicle without engine coolant. One example is a heating apparatus using a PTC heater (Positive Temperature Coefficient Heater).

This technique includes a PTC heater 5 installed on the inner passage 3 of the air conditioning case 1, and a control unit 7 for controlling the PTC heater 5, as shown in FIG.

The PTC heater 5 is a high voltage PTC, and the amount of heat generated is controlled by the duty ratio control of the pulse width modulation (PWM) signal. This PTC heater 5 heats the air blown into a vehicle interior. Therefore, the vehicle interior is heated.

The control unit 7 controls the duty ratio of the PTC heater 5. In particular, the duty ratio of the PTC heater 5 is controlled in accordance with the "discharge air volume" of the blower 9 discharged into the vehicle interior. Therefore, the temperature of the air discharged into the vehicle compartment is controlled in accordance with the "discharge amount of air" of the blower 9.

Here, the control unit 7 receives the "discharge air volume" data of the blower 9 through the blower stage detection sensor 7a.

The control unit 7 stores the "PTC heater PWM duty ratio" for each "blower stage". Therefore, when the number of blower stages is input from the blower stage sensor 7a, a "PTC heater PWM duty ratio" corresponding thereto is detected, and the calorific value of the PTC heater 5 is controlled according to the detected "PTC heater PWM duty ratio". . This allows the PTC heater 5 to be heated to the "target discharge temperature" set by the electronic controller (not shown).

By the way, such a conventional air conditioner is a structure which senses the "air volume" (henceforth abbreviated as "the discharge air volume in a compartment") of the air discharged into a vehicle only through the stage of the blower 9, and the blower 9 When the "discharge air volume in the vehicle room" is changed due to factors other than the number of stages, there is a disadvantage in that it cannot cope with this properly, and there is a problem in that the calorific value of the PTC heater 5 cannot be precisely controlled.

That is, for example, when the vehicle speed is changed in the outdoor air mode, the air volume of the air introduced into the air conditioning case 1 is also changed, and the " discharge air volume in the cabin "

In addition, when the discharge mode of the air is changed, for example, the vent mode, the bi-level mode, the floor mode, the mix mode, and the def mode. If the air flow path and the flow path resistance thereof are different, the " discharge air volume in the vehicle compartment " is also changed according to the air discharge mode.

In addition, when the opening amount of the temporal door 10 is changed, since the movement path of air and the flow path resistance according to it differ, respectively, "the discharge air volume in a compartment" also changes according to the opening amount of the temporal door 10.

Therefore, the conventional technique of determining the "discharge air volume in the cabin" only by the "single number" of the blower 9, and controlling the amount of heat generated by the PTC heater 5 on the basis of the change in the "discharge air volume in the cabin" The disadvantage is that it does not respond properly.

And there is a problem in that it is not possible to precisely control the amount of heat generated by the PTC heater (5), there is a risk that unnecessary energy is consumed due to this problem, there is a disadvantage that can not accurately control the temperature in the vehicle interior. In particular, since the temperature in the vehicle interior cannot be precisely controlled, there is a problem that comfort in the vehicle interior is inferior.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to accurately detect an actual "in-vehicle discharge wind volume" in consideration of various factors for changing the discharge air volume in a vehicle interior. The present invention provides a vehicle air conditioner capable of precisely controlling the amount of heat generated by the PTC heater based on this.

Another object of the present invention is to provide an air conditioner for a vehicle that can be configured to precisely control the amount of heat generated by the PTC heater, thereby preventing unnecessary energy consumption and precisely controlling the temperature in the vehicle interior.

Another object of the present invention is to provide an air conditioner for a vehicle that can be maintained in an optimal state by configuring the temperature in the interior of the vehicle precisely.

In order to achieve the above object, the vehicle air conditioner of the present invention is a PTC heater installed in a hot air passage of the air conditioning case, a blower that sucks the internal and external air and blows the air to the hot air passage of the air conditioning case, and the interior of the vehicle from the blower. In the vehicle air conditioner comprising a control unit for controlling the amount of heat generated by the PTC heater in accordance with the amount of air discharged to the discharge, the discharge air volume influence factor detection means for detecting the factors affecting the amount of air discharged from the blower into the cabin and; The blower discharge air volume discharged from the blower into the vehicle compartment and the blower air volume influence factors inputted from the discharge air volume influence factor detection means are used to correct the blower discharge air volume to calculate an actual vehicle interior air volume discharged into the vehicle compartment. And an air volume calculator, wherein the controller is configured to control the amount of heat generated by the PTC heater on the basis of the vehicle interior air volume calculated by the discharge air volume calculator.

Preferably, the discharge air volume influence factor detecting means includes: air mode sensing means for detecting an external air mode factor influencing the discharge air volume in the vehicle cabin; Vehicle speed detecting means for detecting a vehicle speed factor influencing the discharge air volume in the vehicle cabin; Air discharge mode detecting means for detecting an air discharge mode factor influencing the discharge air volume in the vehicle cabin; It characterized in that it comprises at least any one or more of the tempo door opening amount detection means for detecting the opening amount factor of the temper door to the warm air passage affecting the discharge air volume in the vehicle interior.

The discharge air flow rate calculation unit may include: a memory unit configured to store a discharge air volume correction coefficient for each vehicle speed in the external air mode, a discharge air volume correction coefficient for each air discharge mode, and a discharge air volume correction coefficient for each temporal opening amount; When the outside air mode state, vehicle speed, air discharge mode and temper door opening amount data are inputted from the outside air mode detecting means, the vehicle speed detecting means, the air discharge mode detecting means, and the temporal opening amount detecting means, respectively, corresponding to each input data A detection unit for detecting discharge air volume correction coefficients in the memory unit; And a calculation unit configured to calculate at least one of the discharge air volume correction coefficients detected by the detection unit by calculating a blower discharge air volume discharged from the blower into the vehicle cabin and a preset calculation formula. .

According to the vehicle air conditioner according to the present invention, since the "in-vehicle discharge air volume" is calculated in consideration of various factors for changing the discharge air volume in the vehicle interior, the actual "in-vehicle discharge wind volume" discharged into the vehicle interior is calculated. There is an effect that can be detected accurately.

In addition, since the actual "in-vehicle discharge air volume" can be accurately sensed, there is an effect of precisely controlling the calorific value of the PTC heater based on this.

In addition, since the calorific value of the PTC heater can be precisely controlled, unnecessary operation of the PTC heater can be prevented. Therefore, there is an effect that can prevent unnecessary energy consumption.

In addition, since the calorific value of the PTC heater can be precisely controlled, the temperature in the vehicle interior can be precisely controlled. Therefore, there is an effect that can comfortably maintain the temperature in the interior of the vehicle in an optimal state.

1 is a view showing a conventional vehicle air conditioner,
2 is a view showing the vehicle air conditioner according to the present invention,
3 is a block diagram showing a vehicle air conditioner control method according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail with reference to the accompanying drawings (the same components as those in the prior art are denoted by the same reference numerals).

First, prior to looking at the features of the vehicle air conditioner according to the present invention, a brief description of the PTC heater with reference to FIG.

The PTC heater 5 is installed on the inner passage 3 of the air conditioning case 1, and heats the air introduced into the inner passage 3 while being operated by the applied electricity. Therefore, the vehicle interior is heated.

This PTC heater 5 is a high voltage PTC supplied with power from a battery (not shown). In addition, the high voltage PTC heater 5 controls the amount of heat generated by the PWM duty ratio control.

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

First, referring to FIG. 2, the vehicle air conditioner of the present invention includes a blower stage detecting means 20.

The blower stage detecting means 20 is composed of a voltage sensor for sensing the applied voltage of the blower (9). This voltage sensor senses the voltage applied to the blower 9, thereby detecting the number of rotation stages of the blower 9 for determining the "discharge air volume in the vehicle interior".

And the vehicle air conditioner of the present invention is provided with a discharge air volume influence factor detection means 30 for detecting the factors affecting the "discharge air volume in the vehicle interior".

The discharge air volume influence factor detecting means 30 includes: an outdoor air mode detecting means 32 for detecting an external air mode state, a vehicle speed detecting means 34 for detecting a vehicle speed, and an air discharge mode detecting means for detecting an air discharge mode. 36 and a temporal opening amount detecting means 38 for sensing the opening amount of the temporal door 10.

The outside air mode detecting means 32 is for detecting the outside air mode factor influencing the discharge air volume in the vehicle interior, and is composed of a sensor for detecting the position of the intake door 32a. This sensor senses the outdoor mode position A of the intake door 32a. Therefore, the air conditioner detects whether the "out of air mode" state.

The vehicle speed detecting means 34 is for detecting a vehicle speed factor influencing the amount of discharge air in the vehicle compartment, and is constituted by a vehicle speed sensor.

The air discharge mode detecting means 36 includes an air discharge mode factor that affects the discharge air volume in the vehicle cabin, for example, a vent mode, a bi-level mode, and a floor mode. ), A mix mode (Mix Mode), a dip mode (Def Mode), etc. are detected, and consists of an electronic controller (not shown).

The electronic control device is a "vent mode signal", "bi-level mode signal", "floor mode signal" according to the temperature or air discharge mode set in the vehicle interior when the temperature inside the vehicle is set or the air discharge mode is set And controlling the air discharge mode by outputting a "mix mode signal" and a "diff mode signal", and displaying the air discharge mode state of the air conditioning apparatus as the respective "signals" are output. Therefore, it is possible to detect the air discharge mode of the air conditioning apparatus through each "signal".

The temporal opening amount detecting means 38 is configured to detect an opening amount factor of the temporal door 10 that affects the amount of discharge air in the vehicle cabin, and is configured as a position sensor that detects the opening position of the temporal door 10. do.

The position sensor detects the open position of the temporal door 10 to detect the open amount of the temporal door. In particular, the opening amount on the side of the warm air passage (10a) is sensed.

Referring back to FIG. 1, the air conditioner of the present invention is characterized in that the number of rotation stages of the blower 9 input from the blower stage detecting means 20 and the "discharge air volume effect input from the discharge wind volume influence factor detecting means 30. And a discharge wind amount calculation unit 40 for calculating the actual "in-vehicle discharge wind amount" discharged into the vehicle interior via the factors ".

The discharge air volume calculation unit 40 includes a first memory unit 42, a second memory unit 44, a third memory unit 45, a fourth memory unit 47, a detection unit 48, and a calculation unit 49. ).

The first memory unit 42 stores the "blower discharge air volume" CMH for each stage of rotation of the blower 9.

The second memory unit 44 stores the "discharge wind amount correction coefficient" for each vehicle speed in the outside air mode.

The "discharge air volume correction coefficient" for each vehicle speed in the outside air mode is for correcting the changed "discharge air volume" to the actual "discharge air volume" when the "discharge air volume in the cabin" is changed according to the speed of the vehicle in the outside air mode. As a coefficient, it has a magnitude proportional to the vehicle speed.

The "discharge air volume correction coefficient" for each vehicle speed in the external air mode is data obtained by considering the correlation between the vehicle speed and the "in-vehicle discharge air volume", and these data are obtained through several test results.

In Table 1 below, "discharge air volume correction coefficient" data for each vehicle speed in the outside air mode is disclosed as an example, and the data in Table 1 are stored in the second memory unit 44. As shown in FIG.

Internal and outdoor mode Vehicle speed (km / h) Discharge air volume correction coefficient by vehicle speed (a) Bet mode All 1.0 Outside mode


0 1.0 80 1.0 160 1.5 240 2.0

Preferably, the discharge air volume correction coefficient (a) for each vehicle speed in the outside air mode has a size proportional to the vehicle speed, but is configured to be set to "1" when the intake door 32a introduces the bet. good.

The third memory unit 45 stores the "discharge wind amount correction coefficient" for each air discharge mode.

The "discharge air volume correction coefficient" for each air discharge mode is a coefficient for correcting the changed "discharge air volume" to the actual "discharge air volume" when the "discharge air volume in a vehicle" changes according to the air discharge mode. Has a size inversely proportional to

For example, for the floor mode with the largest flow path resistance, the "discharge air volume correction coefficient" of the smallest size is stored, and for the deep mode with the smallest flow resistance, the largest " Discharge air volume correction coefficient "is stored.

The "discharge air volume correction coefficient" for each air discharge mode is data obtained by considering the correlation between the air discharge mode and the "in-vehicle discharge air volume", and these data are obtained through several test results.

In Table 2 below, "discharge air volume correction coefficient" data for each air discharge mode is disclosed as an example, and the data in Table 2 are stored in the third memory unit 45.

Air discharge mode Discharge air volume correction coefficient by air discharge mode (b) Vent Mode 100 Bi-Level Mode 110 Floor Mode 70 Mix Mode 80 Def Mode 120

The fourth memory unit 47 stores the "discharge wind amount correction coefficient" for each temporal opening amount.

The "discharge air volume correction coefficient" for each temporal door opening amount is to correct the changed "discharge air volume" to the actual "discharge air volume" when the "discharge air volume in the vehicle room" changes according to the opening amount of the temp door 10. As a coefficient for this, it has a size inversely proportional to the amount of opening of the tampe door 10 with respect to the warm air passage 10a. That is, the larger the opening amount of the temporal door 10 with respect to the warm air passage 10a, the smaller the "discharge wind amount correction coefficient" is stored.

The "discharge air volume correction coefficient" for each temporal door opening amount is obtained by considering the correlation between the opening amount of the temper door 10 and the "indoor discharge air volume", and these data are obtained through a plurality of test results. .

In Table 3 below, "discharge air volume correction coefficient" data for each amount of the door opening amount is disclosed as an example, and the data of Table 3 are stored in the fourth memory unit 47.

Temp Door Opening Amount for Warm Wind Path (%) Discharge air volume correction coefficient for each amount of temp door opening (c) 0 1.0 25 1.0 50 0.9 75 0.8 100 0.7

When the rotational stage of the blower 9 is input from the blower stage detection means 20, the detection unit 48 detects, in the first memory unit 42, the "blower discharge air volume" corresponding to the input blower rotational stage.

And when the factors affecting the "discharge air volume in the cabin" are input from the discharge air volume influence factor detecting means 30, for example, the outside air mode detecting means 32, the vehicle speed detecting means 34 and the air discharge mode detection. When the " outer air mode state ", " vehicle speed ", " air discharge mode " and " tempdoor opening amount " data are input from the means 36 and the temporal opening amount detecting means 38, respectively, corresponding to each input data. The "discharge air volume correction coefficients" (a, b, c) are detected in the second to fourth memory units 44, 45, 47, respectively.

The calculation unit 49 is a kind of calculation program, and multiplies at least one or more of the detected "discharge wind amount correction coefficients" (a, b, c) by the "blower discharge wind amount" detected by the first memory unit 42. The actual "in-vehicle discharge air volume" discharged into the vehicle interior is calculated.

Preferably, the calculation unit 49 multiplies all of the detected "discharge wind amount correction coefficients" (a, b, c) by the "blower discharge wind amount" detected by the first memory unit 42 to discharge the inside of the vehicle cabin. It is preferable to calculate the " in-vehicle discharge air volume "

The calculation method of the "in-vehicle discharge air volume" calculation method is as follows.

[Equation 1]

"In-vehicle discharge air volume" (CMH) = "Blower discharge air volume" (CMH) × vehicle speed discharge air volume correction coefficient (a) × air discharge mode discharge air volume correction coefficient (b) × tempdoor opening amount discharge air volume correction coefficient (c)

Referring again to FIG. 1, the air conditioner of the present invention includes a controller 50.

The control unit 50 includes a microprocessor and includes a memory unit 52.

The memory unit 52 stores "PTC heater PWM duty ratio" for each "in-vehicle discharge air volume".

On the other hand, the controller 50 calculates the "PTC heater PWM duty ratio" corresponding to the calculated "discharge air volume in the vehicle" when the discharge air volume calculator 40 calculates the "discharge air volume in the vehicle interior". 52).

Then, the amount of heat generated by the PTC heater 5 is controlled based on the detected "PTC heater PWM duty ratio". Thus, the PTC heater 5 can be heated to the "target discharge temperature" set by the electronic controller (not shown). This allows the temperature in the vehicle compartment to be precisely controlled.

Next, a control method of the vehicle air conditioner having such a configuration will be described with reference to FIGS. 2 and 3.

First, in the state in which the PTC heater 5 is turned on (S101), " blower number " and " discharge air volume influence factors " are inputted from the blower stage detecting means 20 and the discharge air volume affecting factor detecting means 30. (S103).

Then, the discharge air flow rate calculation unit 40 removes the "blower discharge air volume" corresponding to the "stage of blowers" and the "discharge air volume correction coefficients" (a, b, c) corresponding to the "discharge air volume influence factors". The first to fourth memory units 42, 44, 45 and 47 are detected (S105).

When the detection of the "blower discharge air volume" and "discharge air volume correction coefficient" (a, b, c) is completed, the detected "blower discharge air volume" and "discharge air volume correction coefficient" (a, b, c) are Through "Calculation Formula 1", "the discharge air volume in the vehicle compartment" is calculated (S107).

When the calculation of the "discharge air volume in the vehicle interior" is completed, the controller 50 detects "PTC heater PWM duty ratio" corresponding to the calculated "discharge air volume in the vehicle interior" in the memory unit 52 ( S109), the amount of heat generated by the PTC heater 5 is controlled in accordance with the detected "PTC heater PWM duty ratio" (S111).

Then, the PTC heater 5 is precisely heated to the " target discharge temperature " set by the electronic controller (not shown), and the PTC heater 5 thus heated is optimal for the air blown into the cabin. State control precisely. This keeps the interior of the vehicle comfortable.

According to the present invention having the above-described configuration, since the "in-vehicle discharge air volume" is calculated in consideration of various factors for changing the "discharge air volume in the vehicle interior", the actual "car discharged into the vehicle interior" is calculated. The indoor discharge air volume can be detected accurately.

In addition, since the actual "in-vehicle discharge wind amount" can be detected accurately, the amount of heat generated by the PTC heater 5 can be precisely controlled based on this.

In addition, since the calorific value of the PTC heater 5 can be precisely controlled, unnecessary operation of the PTC heater 5 can be prevented. Therefore, unnecessary energy consumption can be prevented.

In addition, since the calorific value of the PTC heater 5 can be precisely controlled, the temperature in the vehicle interior can be precisely controlled. Therefore, the temperature in the vehicle interior can be maintained in an optimal state.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

1: air conditioning case 3: internal passage
5: PTC Heater 9: Blower
10: Temp Door 10a: Hot Air Path
20: blower stage detection means 30: discharge air flow influence factor detection means
32: outside mode detection means 34: vehicle speed detection means
36: air discharge mode detection means 38: temp door opening amount detection means
40: discharge air flow rate calculation unit 42: first memory unit
44: second memory part 45: third memory part
47: fourth memory unit 48: detection unit
49: calculator 50: controller
52: memory section

Claims (7)

PTC heater (5) installed in the hot air passage (10a) of the air conditioning case (1), blower (9) for sucking the internal and external air and blowing it to the hot air passage (10a) of the air conditioning case (1), and the blower In the vehicle air conditioner comprising a control unit 50 for controlling the amount of heat generated by the PTC heater 5 in accordance with the amount of air discharged from the (9) to the vehicle interior,
Discharge air volume influence factor detecting means (30) for detecting factors influencing the air volume discharged from the blower (9) into the vehicle cabin;
The blower discharge air volume discharged from the blower 9 into the vehicle compartment and the blower air volume influence factors inputted from the discharge air volume influence factor detection means 30 are corrected, and the actual blower discharge air volume is discharged into the vehicle interior. It includes a discharge air flow rate calculation unit 40 for calculating the discharge air flow rate,
The control unit (50) controls the amount of heat generated by the PTC heater (5) on the basis of the in-vehicle discharge air volume calculated by the discharge air volume calculation unit (40). The method of claim 1,
The discharge air volume influence factor detecting means 30,
An outside air mode detecting means 32 for detecting outside air mode factors influencing the discharge air volume in the vehicle cabin;
Vehicle speed detecting means (34) for detecting a vehicle speed factor influencing the discharge air volume in the vehicle interior;
Air discharge mode detecting means (36) for detecting an air discharge mode factor influencing the discharge air volume in the vehicle interior;
It characterized in that it comprises at least one or more of the tempo door opening amount detection means 38 for detecting the opening amount factor of the temper door 10 for the warm air passage (10a) affecting the discharge air volume in the vehicle interior. Vehicle air conditioning system. The method of claim 2,
The discharge air flow rate calculation unit 40,
Memory units 44, 45, which store the discharge air volume correction coefficient (a) for each vehicle speed in the outside air mode, the discharge air volume correction coefficient (b) for each air discharge mode, and the discharge air volume correction coefficient (c) for each temporal opening amount; 47);
From the outside mode detection means 32, vehicle speed detection means 34, air discharge mode detection means 36 and the temp door opening amount detection means 38, the state of the outside air mode, vehicle speed, air discharge mode and temp A detection unit 48 for detecting discharge air volume correction coefficients (a, b, c) corresponding to the inputted data in the memory unit (44, 45, 47), respectively;
At least one or more of the discharge air volume correction coefficients (a, b, c) detected by the detector 48 is calculated by using a blower discharge air volume discharged from the blower 9 into the vehicle interior and a predetermined formula to discharge the vehicle interior. Vehicle air conditioner comprising a calculation unit (49) for calculating the air volume. The method of claim 3, wherein
The calculation unit 49 is represented by the following [formula],
[expression]
In-vehicle discharge air flow rate = blower discharge air flow rate × vehicle speed discharge air volume correction coefficient (a) × air discharge mode discharge air volume correction coefficient (b) × tempdoor opening amount discharge air volume correction coefficient (c)
The vehicle air conditioner, characterized in that for calculating the discharge volume of the vehicle interior. The method according to claim 3 or 4,
The discharge air volume correction coefficient (a) for each vehicle speed in the external air mode has a magnitude proportional to the vehicle speed,
The discharge air volume correction coefficient (b) for each air discharge mode has a size inversely proportional to the flow resistance of air.
And the discharge air volume correction coefficient (c) according to the opening amount of the temporal door has a size inversely proportional to the opening amount of the temporal door 10 with respect to the warm air passage 10a. 6. The method of claim 5,
Vehicle air conditioning apparatus characterized in that the discharge air volume correction coefficient (a) for each vehicle speed in the outside air mode has a size proportional to the vehicle speed, but is set to 1 when the intake door 32a introduces a bet. . The method according to any one of claims 1 to 4,
The control unit 50,
A vehicle air conditioner, characterized in that for controlling the amount of heat generated by the PTC heater (5) by controlling the PWM (Pulse Width Modulation) Duty Ratio (PWM) of the PTC heater (5).

Images