JPH06106953A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To provide an air conditioner for a vehicle wherein complication of manually reoperating a blowing amount of air by an occupant can be suppressed by generating a comfortable blow of air for the occupant in a cabin. CONSTITUTION:Inside and outside air mode use air amount characteristic are respectively stored in inside and outside air mode use air amount characteristic memory means. In the case of introducing the inside air more than the outside air into an air passage 20 by an inside/outside air introducing proportion adjusting means 22a, air blow means 23, 24 are controlled, based on the inside air mode use air amount characteristic. In the case of introducing the outside air more than the inside air into the air passage 20 by the inside/outside air introducing proportion adjusting means 22a, the air blow means 23, 24 are controlled, based on the outside air mode use air amount characteristic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention controls the air volume in each of the inside air circulation mode and the outside air introduction mode.
The present invention relates to a vehicle air conditioner that is comfortable for passengers in a vehicle compartment.

[0002]

2. Description of the Related Art A conventional air-conditioning system for a vehicle air-conditioning system obtains a target blown air temperature into a vehicle compartment from environmental conditions such as an inside air temperature, an outside air temperature, and a vehicle compartment set temperature, and based on the target blown air temperature. The air volume into the passenger compartment is calculated uniformly.

[0003]

In the case of the above prior art,
For example, when performing so-called cooldown control for rapidly cooling the vehicle interior when the vehicle interior is extremely hot, some people prefer this cooldown control, and some people dislike it because noise is too loud. Thus, conventionally,
Even if the air volume was controlled automatically, there was a problem that the passenger manually changed the air volume.

In order to solve the above-mentioned problems, the present invention provides a vehicle air conditioner which makes the ventilation of the passenger compartment comfortable for the occupant, thereby suppressing the trouble of the occupant having to manually operate the air volume. The purpose is to provide.

[0005]

In order to achieve the above object, the present invention provides, in one aspect of the invention, an inside air introducing passage communicating with a vehicle interior and an outside air introducing passage communicating with the outside of the vehicle. An air passage that is provided and has the other end connected to the interior of the vehicle, an air blowing unit that generates an air flow in the air passage, a ratio of the inside air introduced into the air passage from the inside air introduction passage, and the outside air introduction. An inside / outside air introduction ratio adjusting means for adjusting the ratio of the outside air introduced into the air passage from the passage, and the amount of air blown by the air blower into the vehicle interior when the inside air is introduced into the air passage. The inside air mode air volume characteristic storage means for storing the inside air mode air volume characteristic which is the characteristic of the air flow rate characteristic, and the characteristic of the air flow rate to be blown into the vehicle interior by the air blower means when the outside air is introduced into the air passage. And When the outside air mode air volume characteristic storage means stores the outside air mode air volume characteristic and the inside / outside air introduction ratio adjusting means introduces more inside air into the air passage than outside air, the inside air mode air volume characteristic When controlling the blower in consideration of, the inside and outside air introduction ratio adjusting means is introducing more outside air than inside air into the air passage, considering the outside air mode air volume characteristics, the blower means The gist of the present invention is an air conditioner for a vehicle, which is provided with an air volume control means for controlling.

Further, in the invention of claim 2, the air volume is manually controlled by an air occupant in the vehicle from the air blowing means toward the vehicle interior, and the air volume is controlled by the air volume control means. When the manual adjustment is performed by the air volume adjusting means when being performed, the inside air mode air volume characteristics and the outside air mode air volume characteristics are determined according to the inside / outside air introduction ratio when the manual adjustment is performed. A vehicle air conditioner according to claim 1, further comprising learning changing means for changing learning.

[0007]

In the case of the first aspect of the present invention, when the proportion of the inside air introduced into the air passage is larger than that of the outside air, the blower means for controlling the air flow into the vehicle compartment is controlled in consideration of the inside air mode air volume characteristic. Further, when the ratio of the air introduced into the air passage to the outside air is larger than that to the inside air, the air blowing unit to the vehicle interior is controlled in consideration of the air amount characteristics for the outside air mode. By doing so, it is possible to suppress the difference in the noise level between the inside air mode and the outside air mode.

In the second aspect of the present invention, when the occupant in the passenger compartment manually adjusts by the air volume manual adjusting means when the air blowing means is controlled by the air volume characteristic for the inside air mode or the air volume characteristic for the outside air mode, Both of the above characteristics can be learned and changed according to the ratio of the introduced inside / outside air when manual adjustment is performed. This makes it possible to reflect, in consideration of noise, air-conditioning feeling, etc., the proportion in which the passenger in the passenger compartment prefers the inside air mode and the proportion in which the passenger prefers the outside air mode to both of the above characteristics. It can be anything you like.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows a specific configuration of an embodiment of the vehicle air conditioner of the present invention. An inside / outside air switching damper 22a is installed at the most upstream side of the air conditioning unit 20. The inside / outside air switching damper 22a includes an outside air introduction port 41 and an inside air introduction port 4
2 is arranged in a separate portion, and an actuator (not shown) selects the ratio of the inside air and the outside air of the air introduced into the air conditioning unit 20 as the air passage. The ratio of the inside / outside air at that time is detected by the inside / outside air ratio detector 38 in the actuator (not shown). The blower motor 24 and the fan 23 fixed thereto are for sucking air into the air conditioning unit 20 and blowing the air to the air downstream side of the air conditioning unit 20, and the evaporator 25 and the heater core 26 are provided at the air downstream side of the fan 23. It is provided. In addition, in this embodiment, the fan 23 and the blower motor 24 constitute a blower.

The evaporator 25 is a heat exchanger that constitutes a refrigeration cycle together with a compressor or the like (not shown), and dehumidifies and cools the passing air. The heater core 26 is a heat exchanger in which engine cooling water (not shown) circulates, and heats passing air.

An air mix damper 22b is provided on the upstream side of the heater core 26. The opening degree of the air mix damper 22b is adjusted by an actuator (not shown), whereby the ratio of the air passing through the heater core 26 and the air bypassing the heater core 26 is adjusted, and the temperature of the air blown into the vehicle compartment is controlled. .

A defroster outlet 43 for blowing the conditioned air toward the windshield, a face outlet 44 for blowing the conditioned air toward the upper body of the front seat occupant, are provided at the most downstream side of the air conditioning unit 20. And foot outlets 45 for ejecting the conditioned air toward the feet of the front seat occupants, and the defroster outlet damper 22c and the face outlet damper 2 are provided at the respective outlets.
2d and a foot blowout damper 22e are provided. Then, the temperature-controlled air is blown out in each blowing mode by operating each of these dampers by an actuator (not shown).

The amount of air blown into the vehicle compartment is controlled by the drive circuit 30 which drives the blower motor 24 based on the output signal from the microcomputer 31. The microcomputer 31 includes a central processing unit (CPU), R (not shown).
OM, RAM, standby RAM, I / O port, A /
It has a D conversion function and the like, and is known per se.
In this embodiment, the ROM constitutes the air volume characteristic storage means for the inside air mode and the air volume characteristic storage means for the outside air mode.

The standby RAM is an RA for storing (backing up) a value in which an occupant's preference is learned even when the ignition switch (hereinafter referred to as IG.) Is turned off.
M, and IG. From the battery even when is off
G. Power is supplied directly without going through. In addition, the microcomputer 31 is provided with a backup power supply (not shown) so that power is supplied to the microcomputer 31 for a short time even when the power is removed from the battery.

The microcomputer 31 includes an operating section 37.
The output signal from is input. The operation unit 37 is an AUTO switch for setting an automatic control state (not shown), a manual inside / outside air changeover switch, a manual blowout mode changeover switch (defroster, face, foot, bilevel, footdef), and a manual air flow rate changer as an air flow rate manual adjusting means. It is composed of switches.

Further, the microcomputer 31 indicates that the environmental conditions affecting the air conditioning in the passenger compartment are the inside air temperature sensor 3
3, the ambient temperature sensor 34, and the solar radiation sensor 35 are input via the respective level conversion circuits 32, and these are A / D converted by the microcomputer 31 to read the environmental conditions. Further, the temperature preferred by the occupant is input from the temperature setting switch 36, level-converted by the level conversion circuit 32, and input to the microcomputer 31.

Next, basic control by the microcomputer 31 will be described with reference to FIG. The microcomputer 31 uses the IG. When the switch is turned on, control is started in step 100, and the process proceeds to step 110, in which initial values such as various conversions and flags are set.

In the next step 150, the inside air temperature sensor 3
3, environmental conditions are input by sensor signals from the outside air temperature sensor 34 and the solar radiation sensor 35, and the temperature setting switch 3
6 and the state of the operation switch from the operation unit 37,
Go to step 200.

In step 200, the target outlet temperature (TAO) of the air blown into the vehicle compartment is calculated according to the following equation 1 based on the environmental conditions input in step 150.

[0020]

[Number 1] _{TAO = K SET × T SET -K} R × T R -K AM ×
_{T AM -K S × T S +} C However _{K SET, K R, K AM} , K S is a coefficient, C is a constant, T _SET is the set temperature, T _R is the inside air temperature, T _AM is the outside air temperature, T _S Is the amount of solar radiation.

Next, in step 300, the opening of the air mix damper 22b is calculated with respect to TAO, and an actuator (not shown) is driven by the drive circuit 30 so that this opening is obtained.
The air sent from the air outlet is controlled at a desired temperature.

Next, the routine proceeds to step 500, where the inside / outside air switching damper 22a calculates the introduction ratio of inside / outside air. In other words, the ratio of outside air introduction (X (%)) and the ratio of inside air introduction (1
00-X (%)) is calculated. Then, an actuator (not shown) is controlled via the drive circuit 30.

Next, in step 400, the blower voltage applied to the blower motor 24 is calculated, and the fan 23 fixed to the blower motor 24 is rotated through the drive circuit 30 to control the air flow rate. However, the occupant's preferred air volume varies depending on the occupant, and also varies depending on the state of the inside / outside air mode. That is, the noise from the blower is generally louder in the inside air mode than in the outside air mode, and the degree of dislike of this noise varies from person to person. Therefore, in step 400 of this embodiment, when the air volume is changed by a manual operation of the occupant, this change is controlled together with the inside / outside air mode at this time so as to be reflected in the air volume control from the next time. This will be described in detail later.

Next, in step 600, an actuator (not shown) that drives the defroster blow-out damper 22c, the face blow-out damper 22d, and the foot blow-out damper 22e by calculating the state of the blow-out mode is controlled via the drive circuit 30.

Next, in step 700, a compressor (not shown) is controlled. After the process of step 700, the process returns to step 150 to read various signals again, and thereby TAO is calculated in step 200.
And the state of the switch read in step 150, steps 300, 500, 400, 600, 70
When 0, the air conditioning control is repeated.

Next, the details of step 400 are shown in FIG.
This will be described in detail with reference to FIGS. 5, 6 and 7. In step 401 following step 400, it is determined whether or not the air flow rate is manually set (changed) by the operation unit 37. If there is no manual setting here, NO is determined and the process proceeds to step 402. Since the initial value of F1 is set to 0 in step 110, it is determined to be NO in step 402 and the process proceeds to step 406.

When the air flow rate is automatic control, F2 = 0,
When NO is determined in step 406, the process proceeds to step 407, and the blower voltage V _F is determined according to the blower voltage characteristics with respect to the target outlet temperature TAO in each of the inside air mode and the outside air mode shown in FIG. Specifically, V _FRS and V _REC are obtained from the characteristics shown in FIG. 5 and TAO obtained in step 200, and V _FRS and V _REC and step 50 are obtained.
From the outside air introduction ratio (x) obtained by 0, V _F is determined according to the following mathematical formula 2.

[0028]

[Equation 2] By the way, the blower voltage characteristic shown in FIG. 5 is a characteristic that indicates the air volume that is most popular by the person in the inside air mode and the outside air mode.
Remembered in.

Here, the V _FRS , which is the blower voltage characteristic that most general people prefer in the outside air mode, will be described with reference to FIG. TAO in FIG. 6 becomes lower along the left side of the horizontal axis. When TAO≤T1, the maximum cooling state is reached, and the blower voltage becomes _VH . This state means a rapid cooling state in which the inside air temperature is considerably higher than the set temperature.

Until TAO gradually rises above T1 and the inside air temperature reaches T3, which is close to the set temperature, the Ploer voltage V _FRS gradually decreases. When the inside air temperature is close to the set temperature T3 ≦ TAO <T5, the blower voltage V _FRS is L.
It becomes _VL which is _O. When TAO becomes gradually higher than T5, the blower voltage V _FRS gradually increases.

When TAO ≧ T7, V _FRS = V _H. This state means that the inside air temperature is considerably lower than the set temperature and is in the maximum heating state. As for the blower voltage characteristic in this TAO, the TAO is divided into eight by T1 to T7 in the figure, and for example, seven points (T1, V1), (T2, V1) are plotted such as the blower voltage V1 with respect to T1.
2), (T3, V3), (T4, V4), (T5, V
5), (T6, V6), and (T7, V7) are connected to each other, and these seven points are stored in the ROM in advance.

[0032] As for the V _REC is a blower voltage characteristic most common human prefer the inside air mode, as in the case of V _FRS, 7 single point (T1, V1), (T2 , V
2), (T3, V3), (T4, V4), (T5, V
5), (T6, V6), and (T7, V7) are connected to each other, and these 7 points are stored in the ROM in advance.

Next, in step 411 (FIG. 4), the blower voltage V _F calculated in step 407 is applied to the blower motor 24 via the drive 30. Then step 41
2, go through the subroutine of step 400, and
Go to step 600 of. In this embodiment, the air volume control means is constructed in step 411.

Next, when the air flow rate is manually set (changed) by the operation unit 37, it is determined Yes in step 401, and the process proceeds to step 408. In step 408, the learning request flag F1 and the flag F2 indicating the manual setting state of the air volume.
And are set, and the counter CNT1 for indicating the time after the manual setting is cleared. CNT1 is constantly incremented by a timer interrupt (not shown) every predetermined time, for example, every 0.1 seconds.

At step 409, the value of TAO at that time is stored as CTAO, and then the routine proceeds to step 406. In step 406, since F2 = 1 is set in step 408, it is determined to be Yes and step 41
Proceed to 0 and change the blower voltage V _F to the manually set blower voltage V _M. Thereafter, the process proceeds to step 411, the applied voltage of the blower motor 24 is controlled so as to be the manually set blower voltage V _M , the subroutine is exited, and the process proceeds to step 600 of FIG.

Next, if the occupant is manually setting the air volume when the subroutine 400 is called, steps 401, 408, 409, 406, 410 and 41 are executed as described above.
The control is performed in the order of 1 and 412 to exit the subroutine, and the applied voltage of the blower motor 24 is controlled so that the manually set blower voltage is obtained. However, when the manual setting is completed, it is determined No in step 401 and the process proceeds to step 402.

In step 402, since F1 = 1 is set in step 408 as described above, it is determined to be Yes and the process proceeds to step 403. Since CNT1 is cleared to 0 in step 408 and is constantly incremented every 0.1 seconds as described above, CNT1 <C1 (C1 is a constant, here C1 =
Since it is 50), No is determined and step 406
Proceed to. In step 406, since the manual setting flag F2 = 1 is set in step 408, it is determined to be Yes, and thereafter, the control is performed in the order of steps 410, 411, and 412 to exit the subroutine, and the manually set blower voltage is set. The voltage applied to the blower motor 24 is controlled. Within 5 seconds after completion of manual setting, step 40 described above
0,401,402,403,406,410,41
The respective controls of 1 and 412 are repeatedly executed.

Then, after the manual setting is completed, 5 (= 0.1 ×
When 50) seconds or more have elapsed, CNT1 ≧ C1 (= 50) is satisfied and it is determined Yes in step 403, and step 404
Then, the learning request flag F1 is reset. Then, in step 405, the blower voltage calculation map (FIG. 5) for each of the outside air mode and the inside air mode is changed (learned) based on the manually set value and the inside / outside air introduction ratio at that time. This changing method will be described in detail later. Next, control is performed in the order of steps 406, 410, 411, and 412, and then the subroutine is exited. In this embodiment, the learning changing means is constructed in step 405.

As described above, when the occupant manually sets the amount of air blow to his or her own preference, after a predetermined time (5 seconds in this case) has elapsed after the manual setting is completed, the blower voltage characteristic during auto operation (FIG. 5) is The characteristics of the blower voltage in each of the outside air mode and the inside air mode are changed to reflect the passenger's preference. As a result, the occupant's preference for the air volume and the preference of the inside / outside air mode in consideration of the noise level can be reflected.

After that, when the occupant operates the AUTO switch of the operation unit 37, the manual setting flag F2 is reset in step 150 (FIG. 3), and the blower voltage is automatically controlled by the blower voltage. That is, step 406 (FIG. 4)
Is determined as No., the blower voltage V _F is calculated from the blower voltage characteristic after learning in step 407, and the applied voltage of the blower motor 24 is controlled so that the blower voltage becomes the V _F.

Therefore, each time the occupant changes the air flow rate according to his or her preference, the preference is learned in step 405, and during the automatic operation, the blower voltage V _F is calculated from the blower voltage characteristic after learning and incorporating the preference. Then, the applied voltage of the blower motor 24 is controlled so that the blower voltage becomes the V _F.

Here, the reason why the learning is performed in step 405 only when a predetermined time has elapsed after the manual setting of the air flow rate is that the occupant learns when the manual setting is made, or when the erroneous manual setting is made by mistake. This is to avoid learning and learning in the case where the occupant likes the fluctuation of the air flow rate for a short time.

Next, the learning method in step 405 will be described in detail with reference to FIGS. 6 and 7. Here, a learning method of the blower voltage characteristic ( _VFRS ) in the outside air mode will be described.

As described above, the most common person is the outside air mode.
The blower voltage characteristic that is sometimes preferred is shown by the solid line in FIG.
7 are indicated by broken lines respectively, and the 7 points (T₁，
V₁), (T₂, V₂), (T₃, V₃), (T_Four, V
_Four), (T_Five, V_Five), (T ₆, V₆), (T₇，
V₇) Is stored in the ROM. Where TAO is T
₁~ T₇It is divided into 8 parts, but immediately after the manual setting is completed.
TAO is stored as CTAO in step 409.
Therefore, the value of this CTAO is CTAO ≦ T₁Place
If T₁<CTAO <T₇, And CTAO ≧ T₇
Each of the cases will be described.

If CTAO≤T ₁ , for example, when CTAO is point A in FIG. 7 and the occupant manually sets the air flow rate of the blower voltage V _A , the blower voltage V stored in the ROM
₁ is learned and changed to V ₁ N according to Equation 3 below.

[0046]

Equation 3] is _{V 1 N = V 1 + α} (V A -V 1) X / 100 where alpha is a constant, the passenger's preference, for example, alpha = 0.3 and the one changed as shown Take in about 30%, and gradually change to blower voltage characteristics that reflect passenger preferences. Further, X / 100 is the outside air introduction ratio at the time of the manual change, and if, for example, X = 80, about 80% of the fact that the occupant prefers the outside air mode considering the loudness of the sound is taken in. . As for the remaining 20%, as will be described later, the occupant prefers the inside air mode after considering the loudness of the sound. Change (V _REC ).

When T ₁ <CTAO <T ₇ , for example, C
When TAO is T ₄ ≦ CTAO <T ₅ and point B in FIG. 7, when the occupant sets the air flow rate of the blower voltage V _B as a means setting,
V ₄ and V ₅ are learned and changed to V ₄ N and V ₅ N according to Equations 4 and 5 below.

[0048]

[Equation 4]

[0049]

[Equation 5] That is, the section between C ₁ and T ₇ is searched, and the CTAO at that time is T _n ≤CTAO <T
When n + 1 (n = 1 to 6), the two blower voltages Vn and Vn + 1 corresponding to the section are learned according to the following formulas 6 and 7.

[0050]

[Equation 6]

[0051]

[Equation 7] When CTAO ≧ T ₇ , for example, when the occupant manually sets the air flow rate of the blower voltage V _C when CTAO is point C in FIG. 7, V ₇ is learned and V ₇ N is changed according to the following formula 8.

[0052]

## EQU8 ## V ₇ N = V ₇ + α (V _C −V ₇ ) X / 100 As described above, when the outside air introduction ratio is X (%),
Every time the occupant manually sets the air volume that he or she prefers in consideration of the loudness of the sound, the contents learned in the standby RAM V ₁ N, V ₂ N, V ₃ N, V ₄ N, V ₅ N, V ₆ N and V ₇ N are fetched, and these values are updated to values reflecting the occupant's preference and stored. By repeating this cycle, the blower voltage characteristic (V _FRS ) in the outside air mode, which is updated, matches the occupant's individuality.

Blower voltage characteristics ( _VFRC ) in the inside air mode
Also, the blower voltage characteristic (V _FRS ) in the outside air mode
It is learned in the same manner as in. In this case, (100-X) / 100 may be substituted for X / 100 in the above formulas 3 to 8. From this equation, the internal air introduction ratio is (10
When the 0-X)%, the air volume which he prefers in consideration of the magnitude of the sound each time the passenger set manually, the blower voltage characteristic of the inside air mode (V _{RE C)} is conform to the occupant's personality It will be what you did.

As described above, in the above-described embodiment, the air volume characteristics are comfortable for the occupant in the inside air mode and the outside air mode. Etc. can be suppressed.

Further, in the above-described embodiment, since the inside air mode air volume characteristic and the outside air mode air volume characteristic can be learned and changed in accordance with the occupant's manual operation amount, both of the above characteristics are more comfortable for the occupant. can do.

In the above embodiment, CTAO is Tn ≦ C.
When TAO <Tn + 1, only VnN and Vn + 1N are learned and the value is updated, but Vn-1N and Vn + 2N, or a wider value may be updated and learned.

In the above-mentioned embodiment, the learned contents are changed to IG. I used a standby RAM to store it even when it was off,
A non-volatile memory may be used without using the standby RAM. Also in this case, IG. When it is off, the learned contents are saved even when the power supply from the battery is stopped.

In the above embodiment, the target outlet temperature is divided into eight at seven points, but it may be divided more finely (for example, 200 divisions) or roughly divided (for example, four divisions).
You may.

Further, in the above embodiment, TAO is divided in the entire temperature range, and the blower voltage characteristics are changed by learning in all the blower voltages corresponding to the respective TAO, but the learning is performed only in a part of the temperature range. Is also good.

In the above embodiment, the inside air mode air flow rate characteristic and the outside air mode air flow rate characteristic shown in FIG. 5 are respectively set to an outside air introduction rate of 1 when the inside air introduction rate is 100%.
Although it was set as when it was 00%, it was not always 10
The introduction ratio does not need to be 0%, and may be set to about 90%, for example.

[0061]

As described above, in the present invention, the air volume characteristic for the inside air mode and the air volume characteristic for the outside air mode are provided, and both of these characteristics are controlled according to the ratio of the inside and outside air introduced at that time. It is possible to perform the ventilation control suitable for the inside / outside air mode at that time, and to perform the ventilation control comfortable for the passenger in the vehicle compartment. Further, since both of the above characteristics can be learned and changed in accordance with the occupant's manual adjustment, both of the above characteristics can be made to suit the occupant's preference, and thereby more comfortable air blowing control can be performed.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to a claim of the present invention.

FIG. 2 is an overall view showing a ventilation system and a control system of an embodiment of the present invention.

FIG. 3 is a flowchart showing a flow of control performed by the microcomputer of the above embodiment.

FIG. 4 is a flowchart showing in detail a control process in step 400 of FIG.

FIG. 5 is a characteristic diagram showing the air volume characteristic for the inside air mode and the air volume characteristic for the outside air mode in the above embodiment.

FIG. 6 is a characteristic diagram showing the air flow rate characteristic for the outside air mode.

FIG. 7 is a characteristic diagram after learning and changing the characteristic diagram shown in FIG. 6;

[Explanation of symbols]

20 Air-conditioning unit as air passage 22a Inside / outside air switching damper as inside / outside air introduction ratio adjusting means 23 Fan as blowing means 24 Blower motor as blowing means Step 405 Learning changing means Step 411 Air volume control means

Claims (2)

[Claims] 1. An inside air introducing passage communicating with the vehicle interior and an outside air introducing passage communicating with the outside of the vehicle are provided on one end side, and an air passage communicated with the vehicle interior on the other end side, and an air flow in the air passage. A blower for generating the inside air and the outside air introduction ratio adjustment for adjusting the ratio of the inside air introduced into the air passage from the inside air introduction passage and the proportion of the outside air introduced into the air passage from the outside air introduction passage. An internal air mode air volume characteristic storage means for storing an internal air mode air volume characteristic which is a characteristic of an air volume to be blown out into the vehicle compartment by the air blower when the internal air is introduced into the air passage. An outside air mode air volume characteristic storage unit that stores an outside air mode air volume characteristic, which is a characteristic of the amount of air blown by the air blower into the vehicle compartment when the outside air is introduced into the air passage. When the inside / outside air introduction ratio adjusting means introduces more inside air into the air passage than outside air, the inside / outside air introduction ratio adjusting means controls the air blowing means in consideration of the inside air mode air volume characteristics. An air conditioner for a vehicle, comprising: an air quantity control means for controlling the air blowing means in consideration of the outside air mode air quantity characteristic when more outside air is introduced into the air passage than inside air. 2. An air volume manual adjusting means for manually adjusting an air volume blown from the air blowing means toward the passenger compartment to an occupant in the vehicle compartment, and the air volume when the air volume control means is controlling the air volume. When the manual adjustment is performed by the means adjusting means, the learning change means for learning and changing the inside air mode air volume characteristic and the outside air mode air volume characteristic according to the inside / outside air introduction ratio when the manual adjustment is performed. The vehicle air conditioner according to claim 1, wherein: