JPH01136812A - Air-conditioning device for vehicle - Google Patents

Abstract

PURPOSE:To improve controllability, by a method wherein, in an air-conditioning device to perform control according to a solar radiation state, by using a solar radiation state sensor the collection surface of which is laterally inclined, a solar radiation direction and a solar radiation are detected to decide a control amount of an air distribution door. CONSTITUTION:Collection surface 53L and 53R, laterally inclined at an arbitrary angle, are mounted to a solar radiation state sensor 42, and the solar radiation state sensor is mounted to a vehicle through an oblique bed 55 in a state that the collection surfaces of the collection elements 53L and 53R on both sides are laterally inclined and inclined frontwardly. A control part determines a difference between solar radiation detecting signals IR and IL inputted from the two collection parts 53R and 53L to decide form given computation whether a solar radiation region is right or left and compute a solar radiation direction alpha. According to the solar radiation direction alpha, the position of an air distribution door is set to the right or the lift. This constitution prevents exercising of the influence of the altitude of the sun and enables continuous control of the position of the air distribution door, resulting in the possibility to improve controllability.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle air conditioner that performs air conditioning control according to solar radiation conditions.

(Conventional technology) Conventionally, the air conditioning distribution inside the vehicle has been controlled by detecting the solar radiation conditions in the vehicle interior, such as solar radiation intensity and direction, and adjusting the air according to the solar radiation conditions and controlling the air distribution of the air outlets. There is an air conditioner to try to make it more comfortable.

Such an air conditioner includes a solar radiation detector that has a light receiving element that detects solar radiation from the right side of the vehicle, a light receiving element that detects solar radiation from the left side of the vehicle, and a light shielding plate, and a solar radiation detector that detects solar radiation from the left side of the vehicle. It is equipped with a control device that controls various air conditioning equipment. The detected values IR and IL from the left and right light-receiving elements of this solar radiation detector are obtained as characteristics shown by the broken lines in FIG. 17. The characteristics IR and IL shown in the figure are for the case where the solar altitude is constant (β = 60''), and the incident direction is from the front of the vehicle to the right incident range (0 to 90 degrees), and from the front of the vehicle. It shows the characteristics when taken in the left incident range (0 to -90°) from Generally, various air conditioning equipment such as mix doors and blowers are controlled accordingly.

Conventionally, the processing method for this solar radiation correction calculation is as follows:
■As shown by the solid line in Figure 17, the left and right detected values I□ and I
Among L, the mutually larger values are set as the correction calculation value I0,
■As shown by the solid line in Fig. 18, the left and right detected values IR and
Correct the calculated value to become (Work□+IL)/ using . It was calculated as a corrected solar radiation amount.

(Problem to be solved by the invention) However, although conventional solar radiation detectors can detect solar radiation situations where the sun's altitude is above a predetermined angle, both the left and right light-receiving elements are arranged horizontally in the longitudinal direction of the vehicle body. Because of the installed structure, in areas with low sunlight, especially when sunlight hits from the front, the detected solar radiation value becomes small, making it difficult to obtain appropriate correction calculation values and making highly accurate air conditioning control difficult. There is a problem.

In addition, the above correction calculation method (■) is a correction calculation manipulation. If the relative sensitivity suddenly decreases between the right side and the left side and the vehicle changes course slightly to the left or right, the correction calculation value ■. Since this changes greatly, there is a problem in that the blower air volume, etc. that are controlled based on this changes rapidly, and the comfort of the air conditioning inside the vehicle is impaired.

Furthermore, in the case of (■) above, the solar radiation angle from the left and right (approximately 60
In areas where the temperature is large (over 60°, −60°), the detection value (relative sensitivity) of each light receiving element is low, making it difficult to properly correct the amount of solar radiation, making it difficult to control air conditioning in response to the solar radiation situation. There is.

Therefore, in the present invention, it is possible to continuously control the position of the ventilation door in accordance with the detection value of the sensor, which is not easily affected by the solar altitude, and to obtain a correction calculation value that is greater than a predetermined value. The purpose is to provide a vehicle air conditioner that provides a

(Means for Solving Problems and Effects thereof) In the vehicle air conditioner according to the first invention, the right side light receiving surface is composed of one or more elements each arranged at an angle on the right side and the left side of the vehicle. The solar radiation state sensor has a left side light receiving element and a left side light receiving element, and is installed with both light receiving surfaces tilted toward the front of the vehicle body, and by comparing the detection values of both the right side light receiving element and the left side light receiving element, the direction of sunlight is determined by the direction of the vehicle. In addition to determining whether it is a right side area or a left side area, in each area, a calculated value using the difference value between the detected values of both the right side light receiving element and the left side light receiving element is calculated as the magnitude in the solar radiation direction in both the left and right areas, respectively. It is configured to include a solar radiation direction calculation means for outputting, and a control means for driving and controlling various air conditioning equipment such as a ventilation door based on the output signal from the solar radiation direction calculation means,
Therefore, since both the left and right light receiving elements of the solar radiation state sensor are tilted toward the front of the vehicle body, it is possible to reliably detect the solar radiation state even when the solar altitude is low. In addition, since the magnitude in the solar radiation direction is calculated using the detected values of the left and right light-receiving elements, the control of the door position of the ventilation door and the control of other equipment can be performed based on the magnitude of the detected value of the solar radiation state sensor. This will be done accordingly.

In the vehicle air conditioner according to the second aspect of the invention, the light receiving surface has a right side light receiving element and a left side light receiving element each consisting of one or more elements disposed at an angle on the right side and the left side of the vehicle, respectively. By comparing the detection values of both the right side light receiving element and the left side light receiving element with a solar radiation state sensor installed with both light receiving surfaces tilted toward the front of the vehicle body, it is determined whether the solar radiation direction is on the right side or the left side of the vehicle. , a solar radiation direction calculation means for outputting a calculated value using the difference value between the detection values of both the right side light receiving element and the left side light receiving element as the magnitude of the solar radiation direction in both the left and right areas in each area; Within a predetermined solar radiation direction range extending from to both left and right sides of the vehicle body, a calculated value based on the solar radiation direction from the solar radiation direction calculating means and the detected value of the right or left light receiving element is output as a solar radiation intensity correction calculated value. On the other hand, outside the range of the predetermined solar radiation direction, the solar radiation intensity calculation means outputs the detected value of the right or left light receiving element as a solar radiation intensity correction calculation value, and the ventilation door is opened based on the output signal from the solar radiation direction calculation means. and control means for driving and controlling the door position of the solar radiation intensity calculation means, and driving and controlling various air conditioning equipment based on the solar radiation intensity correction calculation value from the solar radiation intensity calculation means.
In addition to the effect of the first invention, within a predetermined range, a calculated value using the detected value of the solar radiation state sensor is used as the solar radiation intensity correction value, and outside the predetermined range, the detected value of the sensor is used as the solar radiation intensity correction value, The correction value does not partially decrease as in the past, and stable air conditioning control becomes possible.

(Example) An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows a schematic configuration of an automobile air conditioner 10, and the air conditioner 10 consists of various devices provided in a duct 12 and a control unit 11.

On the most upstream side of the duct 12, there is an inside air population 13 and an outside air population 1.
This duct 1 is equipped with an intake door 15 that switches between
2, a blower 16, an evaporator 17, a mix door 18, and a heater core 19 are arranged in order from the upstream side.
At the most downstream side of the duct 12, a vent outlet 20, a defroster outlet 23, and a heat outlet 24 communicating with the vehicle interior are provided. These air outlets 20, 23.24 are opened and closed by being switched by switching doors 25, 25.25 for mode switching.

The vent outlet 20 includes left and right center outlet 21R,
21L and left and right side air outlets 22R and 122L,
Upstream of these left and right air outlets 21R, 22R, 21L, and 22L, a ventilation door 26 that distributes the air volume to the left and right is provided.

The evaporator 17 constitutes a cooler 32 together with a compressor 28 that compresses and circulates refrigerant, a condenser 29, a receiver tank, and an expansion valve 31. The cooler 32 is driven by a pulley 33 to which power from an engine 35 is transmitted via a magnetic clutch 34. The air introduced by the blower 16 passes through the evaporator 17 and is cooled.

Engine cooling water flows through the heater core 19, thereby heating the air that has passed through the evaporator 17.

The ratio of air passing through the heater core 19 is set by the opening degree of the mix door 18. Then, each switching door 25°25.25 for mode switching opens the vent outlet 2.
0, the defroster outlet 23, and the heat outlet 24 are selected, and conditioned air is sent into the vehicle interior.

The control unit 11 also includes a potentiometer 41. which detects the opening degree θ8 of the mix door 18.
A solar radiation state sensor 42 that detects the amount of solar radiation IR, I, etc., an outside temperature sensor 4 that detects the outside temperature t, and a starvation vehicle interior temperature t.
The control circuit 11 is equipped with a vehicle interior temperature sensor 44 for detecting temperature r, and a temperature setting device 45 for setting the vehicle interior to a predetermined temperature. 46 are connected.

The solar radiation state sensor 42 is shown in FIGS. 2(a) and 2(b).
And as shown in FIG. 4, the windshield 47 of the passenger compartment
It is installed on the instrument panel 48 inside. This solar radiation state sensor 42 is shown in the rear view of FIG. 3(a) and in FIG.
As shown in the side view of FIG. 3B and the perspective view of FIG. 5
The right photodiode (
The photodiode (light receiving element) 53R1 and the left side photodiode (light receiving element) 53L installed on the slope 52b, and a dark filter 54 that covers the base 52 and above the photodiodes 53R and 53L are provided. Therefore, the light-receiving surfaces of the right or left photodiodes 53R, 53L are arranged at an angle toward the right or left of the vehicle. Further, the substrate 51 is placed on a tilting table 55.

The inclined base 55 has a slope 55a that slopes upward (at a predetermined angle ψ) toward the rear of the vehicle, and the substrate 51 is installed on the slope 55a. Therefore, both the left and right photodiodes 53R and 53L are installed with their light receiving surfaces tilted to the right or left and tilted forward at an angle ψ. This solar radiation state sensor 42 is connected to the control unit 11, and its equivalent circuit can be shown as shown in FIG. 3(d). As a result, even when the sun altitude β is low and the sun is shining from the front of the vehicle, the solar radiation state sensor 42 can reliably detect the solar radiation state sensor 42, and is not affected by the sun's altitude.

Further, the control unit 11 includes a microcomputer having an I10 board, a CPU, a memory, etc., an A/D converter that converts each input signal into a digital signal, and a drive circuit that drives and controls various air conditioning equipment. has been done. When the air conditioner is automatically driven, the detected values Itt and IL from the solar radiation state sensor 42 are
The solar radiation correction value I. This correction value Io and the input data t1゜t from each of the other sensors 43, 44.45 are calculated.
A comprehensive signal (control signal) T is calculated using r and tD, and each control signal based on this comprehensive signal T switches the intake door 15 using the motor actuator 56, operates the cooler 32 via the magnetic clutch 34,
The motor actuator 57 controls the opening degree of the mix door 18, the motor actuator 58 switches the mode doors 25, 25, 25 to set the blowout mode, and the motor actuator 59 controls the opening of the distribution door 26.
adjustment is made automatically. Further, by turning on the manual switch 46, switching between inside and outside air and blowing mode can be performed manually.

The microcomputer constitutes a solar radiation direction calculation means, a solar radiation intensity correction calculation means, and a control means.

Next, air conditioning control of the air conditioner will be explained based on flowcharts shown in FIGS. 5, 6, and 8. In addition,
FIG. 5 shows a main routine for air conditioning control, FIG. 6 shows a subroutine for eye direction processing, and FIG. 8 shows a subroutine for solar radiation intensity correction processing.

First, when the air conditioner is started, air conditioning control starts according to the main routine. In step P1, initial settings are made for each register of the microcomputer and data in the RAM. In step P2, each sensor 42, 43
．． 44 and each detection signal IR+IL from the temperature setting device 45
+taHtr, tI) is read, and in step P3, the solar radiation direction is calculated using the detection data IR, IL from the solar radiation state sensor 42, and the ventilation door position is determined. is set. Next, in step P4, a correction value I of the amount of solar radiation is determined based on the detection data E□+IL from the solar radiation state sensor 42. calculations are performed. Furthermore, this solar radiation amount correction calculation value IO and other sensors 43, 44 .
Using the detection data ta, tr, and tD from 45, a total signal T for controlling the entire air conditioner is calculated according to the following equation. In addition, in the following formula, K□ is 2. and indicate the coefficients, respectively.

”=Kt t r + K2 t a + I.-3t.

Then, in step P5, the intake door 15, the blower 16, the compressor 28, and the mix door 1 switch between the inside and outside air by each drive circuit based on the overall signal T.
8, mode door 25, 25.25, and ventilation door 26
The following controls are performed.

In the solar radiation direction calculation process, as shown in FIG. 6, it is determined in step P3゜1 that IR-IL≧O, and if IR-IL≧0, the solar radiation area is determined as the right side area of the vehicle. In step P302, KX ((IRIL
) /IR) as the direction α of the sun,
In step P303, the ventilation door 26 is positioned so that the amount of air from the right side air outlets 21R and 22R increases. is set to a value corresponding to the solar radiation direction α obtained by calculation. On the other hand, in step P3゜1 1. - If IL≧0, it is determined that the solar radiation direction is on the left side of the vehicle, and step P
304, -Kx ((IL-It1)/IL
＞ is the solar radiation direction, and step P
At 30fi, the door position D0 of the ventilation door 26 is set to a value according to the solar radiation direction α so that the amount of air from the left air outlets 21L and 22L increases. Note that K indicates a coefficient.

In this solar radiation direction calculation process, the calculation characteristic of the solar radiation direction is obtained as a characteristic that increases approximately linearly according to the left and right solar radiation directions, as shown in FIG. Incidentally, FIG. 7 shows the relationship between the solar radiation direction α and the solar radiation direction output SD, and the solar radiation direction output SD is obtained by the calculated value SD'' (IRIL)/IR. The broken lines indicate the sensor output values when the solar altitude β is 15° and 60°, and the above calculated value α is obtained as a characteristic that approximates these actual measured values.In addition, the output for the solar radiation direction shown in Fig. 6 As a characteristic, the actual measured value expands depending on the solar altitude β, but since the solar radiation state sensor is tilted toward the front of the vehicle,
The spread can be narrowed. Note that this subflow is suitable when the solar radiation altitude is high.

The above solar radiation intensity processing is performed in step P as shown in FIG.
In 401, the magnitude (incidence angle) of the solar radiation direction α is determined. That is, steps P3゜2 and P
It is determined whether the absolute value of the solar radiation direction α obtained in step 303 is less than or equal to the absolute value of the predetermined solar radiation direction −α1 and α. The above predetermined solar radiation directions −α1 and α1 are the 10th
As shown in the figure, it is a value that is arbitrarily set within the range of the solar radiation angle -α□ to α, which provides the maximum sensitivity of each of the detection data E and IL.

Then, if 1α1≦1α11, step P
Processes 402 to 4°4 are performed, and if 1α1≦1α and 1 is not satisfied, step P40! Processes i to 407 are performed. In step P4゜2, the detected data IR and the
It is determined that IR-IL≧0. Engineering.

In the case of -IL≧0, it is assumed that the solar radiation within the range of -α to α shown in FIG. 10 is in the right side region, and step P40
3, the calculated value I,X (1+x, (1-α/α1)) is the correction value I.

shall be. On the other hand, if IRIL≧0, −α~α
Assuming that the solar radiation within the range of is in the left region, step P
404, I, x (i +Xo (1-α/α1
)) Corrected the calculated value. shall be. X above. is O<x
. X is set to a value of 1.

The term (1-α/α1) has the characteristics shown in FIG.

On the other hand, if 1α1≦1α1 I, step P
A determination is made that 4osI*It, ≧0. That is, the solar radiation regions in the regions -90' to -α1 and α, excluding the range of 1α to α shown in FIG. 10 above and 90° are determined, respectively. Then, in step P4os, IR
- If IL≧0, it is assumed that the right region is in the range of α1 to 90°, and the right side detection data is corrected in step P40g. shall be. If ■□-It is not ≧0, it is assumed that the left region is in the range of -90° to -α, and processing is performed in which the left side detection data IL is set to the correction value I0 in step P407. These correction calculation values are calculated according to the characteristics shown by the solid line in the figure (β = 0°, 30'
, 45°, 70°, 80°), and flat characteristics are obtained above a predetermined value.

Then, the ventilation door 26 is moved to the door position setting value D by the motor actuator 59 in step P6.
Set to 0. Since the setting of the door position is continuously controlled according to the magnitude of the solar radiation direction (α or -α), fine-grained air distribution control is possible and the sense of comfort inside the vehicle can be improved. In addition, the above correction calculation value I. Based on this, a total signal T is calculated in step P, and based on this total signal T, the air flow rate of the blower 16 and the opening degree θ8 of the mix door 18 are controlled in step P6, and these controls are used for solar radiation intensity correction. Air conditioning control will be performed in accordance with the magnitude of the calculated value I0.

Next, another embodiment of the solar radiation direction calculating means will be described. 11 and 12 show the second embodiment of the solar radiation direction calculation means, FIGS. 13 and 14 show the third embodiment, and FIGS. 15 and 16 show the fourth embodiment. , respectively.

First, in the second embodiment, as shown in the subflow of FIG. 11, by determining whether IRIL≧O in step P3□, it is determined whether the solar radiation direction is the right side area or the left side area, and the right side area is In this case, in step P32□, the calculated value KX ((I□-IL)/(IR+IL)) is set as the solar radiation direction α, and in step P3□3, the door position D0 is set to increase the air volume of the right air outlets 21R and 22R. It is set to the left according to the magnitude of the solar radiation direction α so that Further, if IFtIt is not ≧0 in step P321, it is determined that the solar radiation direction is the left side area, and step P3□4
As above, KX ((IR-IL)/(IFI+I)
L)) is set as the solar radiation direction α, and step P3□5
The left air outlets 21L and 22L are set on the right side according to the magnitude of the solar radiation direction so that the air volume of the left air outlets 21L and 22L increases. therefore,
The output signal of the solar radiation direction α is obtained as a solid line in FIG. 12, and this example is also suitable for detecting the solar radiation direction in a region where the solar radiation altitude β is high to some extent. Note that the broken lines in the figure indicate actual measured values.

Next, in the third embodiment, step P33 in FIG.
1, it is determined that IRIL≧0, and when the solar radiation direction is in the right region, it is determined that (IR-IL)/IR≦SDQ. The output characteristics in this case are as shown by the right broken line in FIG. 14, where the solar radiation direction output SD in the right region at each altitude β gradually increases linearly as the solar radiation direction increases, and the solar radiation direction is approximately α2. Since the solar radiation direction output SD becomes constant near -α2, this -constant value is set as the reference value SDo. At step P332 (I
RIL)/engine□□≦SD0, the solar radiation direction output SD
As the linear range of step P33! Kx (
IFI IL ) / IR calculated value as solar radiation direction α
On the other hand, if (E - IL)/IR≦SDo is not satisfied, KXSDo is set to be the solar radiation direction α in step P333, assuming that the solar radiation direction output SD is constant. Then, when the solar radiation direction output SD is within the linear range, the door position of the ventilation door 26 is adjusted in step P334 so that the air volume from the right side air outlets 21R and 22R increases. The solar radiation direction α
On the other hand, in the range where the solar radiation direction output SD is constant, the right side air volume is set to be maximum.
Set left to Full.

Further, if the solar radiation direction is the left side region in step P33□, (IL IR)/1. ≦
A determination called SD is performed. The output characteristics in this case are the 14th
It is as shown by the broken line on the left side of the figure, and has a linear range and a constant range like the right side area. Then, in step P337, if (IL IR)/IL≦SD0, -Kx (IL IR) is determined in step P338.
/IL is set as the solar radiation direction α, and step P339
So, corresponding to this solar radiation direction α, the left air outlet 21L, 22L
The ventilation door is positioned so that the amount of air from the air increases. is set. On the other hand, if (It, -IR)/IL≦SDo does not hold, it is assumed that the solar radiation direction output SD is within a constant range, and -KxSD is obtained at step P34°.

is the solar radiation direction α, and in step P341, the door position Do is set to the right full position so that the left side air volume is maximized.

Note that this embodiment is suitable not only when the solar altitude is high but also over a wide range.

Further, a fourth embodiment will be described. In this embodiment, almost the same processing as in the third embodiment is performed, but in steps P3 and 2 of the right side area, the reference value is set to SDo, and in step P1117 of the left side area, the reference value is set to -SDo. , the characteristics of the solar radiation direction α are as shown in FIG. In addition, in this example, the denominator is IR+IL (IFI-IL)/
Each process (step P3
S2 + P3S3 + P317 * P, +sa
) is being carried out. Therefore, the door position of the ventilation door 26.

Furthermore, the control accuracy of various devices such as the mix door 18 and the blower 16 can be improved.

(Effects of the Invention) As explained above, according to the present invention, since the solar radiation state sensor is installed tilted toward the front of the vehicle body, the solar radiation state sensor such as the solar radiation direction and solar radiation intensity can be reliably detected without being affected by the solar altitude. can be detected.

In addition, since the magnitude in the solar radiation direction is determined by calculation using the detected values of the left and right light receiving elements of the solar radiation condition sensor, the position control of the ventilation door is continuously performed in accordance with the magnitude of the detected value of the solar radiation condition sensor. Air distribution control becomes possible. Furthermore, within a predetermined range of the solar radiation direction, by calculating the solar radiation intensity correction value using the detection value of the solar radiation state sensor, the correction calculation value becomes a flat characteristic with a predetermined value or more, and the calculation value is low as in the past. It becomes possible to eliminate parts and low areas. As a result, sudden changes in temperature control such as the blower air volume can be prevented, appropriate solar radiation correction can be performed over a wide area, and air conditioning control can be made more comfortable.

[Brief explanation of the drawing]

1 to 10 relate to the first embodiment of the present invention, in which FIG. 1 is a schematic configuration diagram of an air conditioner, and FIGS. 2(a) and 2(b).
) are a plan view and a side view showing the installation location of the solar radiation state sensor, and FIGS. 3(a), (b), and (C). (d) is a rear view and a left side view showing the solar radiation state sensor, respectively;
A perspective view and its equivalent circuit, Fig. 4 is a left side view showing the installation status of the solar radiation state sensor, Fig. 5 is a flowchart showing the main flow of air conditioning control, Fig. 6 is a flowchart showing solar radiation direction calculation processing, FIG. 7 is a characteristic diagram showing the relationship between the solar radiation direction and its calculated value, FIG. 8 is a flowchart showing the solar radiation intensity correction calculation process, and FIG. 9 is X. (1-α/α,
), FIG. 10 is a characteristic diagram showing the solar radiation intensity correction calculation value, FIGS. 11 and 12 relate to the second embodiment of the solar radiation direction calculation means, and FIG. 11 is a flowchart showing the processing, FIG. 12 is its characteristic diagram, FIGS. 13 and 14 relate to the third embodiment of the solar radiation direction calculation means, FIG. 13 is a flowchart showing its processing, and FIG. 14 is its characteristic diagram,
15 and 16 relate to a fourth embodiment of the solar radiation direction calculation means, and FIG. 15 is a flowchart showing the processing,
FIG. 16 is a characteristic diagram thereof, and FIGS. 17 and 18 are characteristic diagrams showing conventional correction calculation values, respectively. 10... Air conditioner 11... Control unit (sun direction calculation means, solar radiation amount correction calculation means, control means) 42... Solar radiation state sensor 53R... Right side light receiving element 53L... Left side light receiving element IR.・・Right side detection value ・・・・Left side detection value Io
... Solar radiation intensity correction calculation value α ... Solar radiation direction calculation value Patent applicant: Diesel Kiki Co., Ltd. Agent Patent attorney: Sumi Mori Sumi Mori Figure 5 Figure 17 Sit? Ken Hat・) No. 78 illustration included ￥r Shio Ken Hat 0) Procedural amendment 0. Yoshi, Director General of the Patent Office, October 24, 1988 1) Tsuyoshi Moon 1 Indication of the case 1988 Patent Application No. 294599 2 Title of the invention Vehicle air conditioner 3 Relationship with the amendment person case Patent applicant 4 Agent 〒16410003) 373-951
0 Address: 2-9-10-6, Honmachi, Nakano-ku, Tokyo Contents of amendment Figures 10, 13, 14, and 17 of the drawings
Figures and Figure 18 Figure 17 @ Enter 3! t or yes (・) Picture 18 included 1! tδ straw hat・)

Claims (1)

[Scope of Claims] 1) A right-side light-receiving element and a left-hand light-receiving element each consisting of one or more elements, each of which has a light-receiving surface disposed at an angle to the right and left sides of the vehicle, and receives light from both of these elements. By comparing the detection values of both the right side light receiving element and the left side light receiving element with a solar radiation state sensor mounted with its surface tilted toward the front of the vehicle body, it is possible to determine whether the solar radiation direction is on the right side or the left side of the vehicle, and to determine whether the solar radiation direction is on the right or left side of the vehicle. a solar radiation direction calculation means for outputting a calculated value using a difference value between detection values of both the right side light receiving element and the left side light receiving element as the magnitude of the solar radiation direction in both left and right regions; and this solar radiation direction calculation means. 1. A vehicle air conditioner comprising: a control means for driving and controlling various air conditioners such as a ventilation door based on an output signal from the vehicle air conditioner. 2) A right-side light-receiving element and a left-hand light-receiving element each consisting of one or more elements are disposed at angles on the right and left sides of the vehicle, and both of these light-receiving surfaces are tilted toward the front of the vehicle. By comparing the detected values of both the right side light receiving element and the left side light receiving element with a solar radiation state sensor installed in solar radiation direction calculating means for outputting calculated values using the difference values between the detected values with the left side light receiving element as the magnitude of the solar radiation direction in both left and right regions; Within the range of the solar radiation direction, a calculated value based on the solar radiation direction from the solar radiation direction calculation means and the detected value of the right or left light receiving element is output as a solar radiation intensity correction calculation value, while within the range of the predetermined solar radiation direction. Outside, a solar radiation intensity calculation means for outputting the detected value of the right or left light receiving element as a solar radiation intensity correction calculation value, and drive control of the door position of the ventilation door based on the output signal from the solar radiation direction calculation means; An air conditioner for a vehicle, comprising: a control means for driving and controlling various air conditioners based on a solar radiation intensity correction calculation value from the solar radiation intensity calculation means.