JPH0739969B2 - Solar radiation amount detection device used for automobile air-conditioning control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to determination of the amount of insolation of sunlight that is inserted into a vehicle compartment, particularly the amount of insolation during uneven solar radiation.

(Prior Art) Conventionally, a plurality of solar radiation sensors should be provided at a portion of a vehicle that is subject to air-conditioning control, for example, at the front and rear of the vehicle, and the air conditioning before and after the vehicle should be appropriately controlled according to the detection values of these sensors. Is proposed. However, multiple (many)
If the solar radiation sensors are installed at various places in the vehicle, many electric wirings are required and the signal processing system becomes complicated. Therefore, it is possible to provide a solar radiation state detection device having a plurality of solar radiation sensors at one location of the vehicle to simplify the structure, for example, Japanese Patent Laid-Open No. 62-7310.
No. 8 publication. This solar radiation state detection device is attached to one location of the vehicle, and has at least three solar radiation intensity detection elements that detect unique solar radiation intensity and intensity azimuth detection means that detects the solar radiation intensity and the solar radiation azimuth from the detection intensity of each element. And a solar radiation state calculation device that calculates the solar radiation state at an arbitrary position of the vehicle based on the intensity and direction of the solar radiation detected by the device. It is intended to detect an insolation state.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional example, partial solar radiation (for example, the solar azimuth α is 60 ° <α <+ 180 ° and −60 ° <α <
When it is in the range of -180 °, it is considered as insolation. ), The amount of insolation detected by the insolation sensor is significantly reduced due to the influence of the windshield or the rear glass, although the amount of insolation is the same as when there is insolation from the front of the vehicle. The amount of solar radiation detected by the solar radiation sensor and the amount of solar radiation detected by the solar radiation sensor are different), and cannot be detected from the rear, so if the amount of solar radiation is corrected according to the detected amount of solar radiation, the amount of solar radiation that should be added to the actual amount of solar radiation will be corrected. There is a drawback that the correction amount is insufficient compared to the amount.

Then, this invention makes it a subject to provide the solar radiation amount detection apparatus which can detect the solar radiation amount of the solar radiation inserted in a vehicle interior regardless of all the solar radiation directions.

(Means for Solving the Problems) Therefore, the gist of the present invention is that, as shown in FIG. 1, firstly, as shown in FIG. The solar radiation amount detecting means 100 composed of a photoelectric conversion element, the solar radiation direction signal calculating means 200 for calculating the solar radiation direction signal from the detection value of the solar radiation amount detecting means 100, and the solar radiation direction signal of the solar radiation direction signal calculating means 200 is a predetermined value or more. When it is, the insolation determining means 300 that determines that it is insolation, and by the determination by this insolation determining means 300, when it is not insolation, it is determined from the total insolation amount characteristics of the left and right insolation from the insolation amount detecting means 100. In the case of partial solar radiation, the solar radiation amount calculating means 400 is provided for determining from the solar radiation amount characteristic that adds the correction amount in the case of partial solar radiation to the total solar radiation amount of the left and right separate solar radiation amounts from the solar radiation amount detecting means 100. Especially.

Secondly, as shown in FIG. 2, a front solar radiation amount is provided in or near the windshield inside the vehicle compartment, and is composed of two photoelectric conversion elements for detecting the solar radiation amounts for the front left and right sides to be inserted into the vehicle interior. Detecting means 100 ', solar azimuth signal calculating means 200' for calculating a solar azimuth direction signal from the detection value of the forward solar radiation amount detecting means 100 ', and this solar azimuth direction signal calculating means 200'
When the solar azimuth signal is greater than or equal to a predetermined value, the insolation determining means 300 'is determined to be the insolation, and the determination by this insolation determining means 300' indicates that when the insolation is not the front left and right from the front insolation detecting means 100 '. Judging from the total solar radiation characteristics of different solar radiation, in the case of partial solar radiation, the correction amount in the case of partial solar radiation is added to the total solar radiation amount of the front and left separate solar radiation from the front solar radiation amount detecting means 100 '. Rear insolation composed of a front solar radiation amount calculating means 400 'which is determined from the solar radiation amount characteristic and a photoelectric conversion element for detecting the rear solar radiation amount which is provided in or near the rear window glass in the vehicle compartment and is inserted into the vehicle compartment. Amount detecting means 500 and this rear solar radiation amount detecting means 5
The rear solar radiation amount from 00 and the front solar radiation amount detecting means 400 ′.
Compare the total amount of solar radiation from the front and left,
It is to be provided with the solar radiation amount determining means 600 which determines the larger solar radiation amount as the solar radiation amount of the vehicle.

(Operation) Therefore, in claim 1, when the solar radiation to be inserted into the vehicle compartment is an insolation having a predetermined solar radiation direction or more, the correction amount is corrected with respect to the total solar radiation amount of the left and right solar radiation amounts from the solar radiation amount detecting means. The amount of solar radiation is obtained as a value with consideration.

In the second aspect, when the solar radiation to be inserted into the vehicle compartment is an insolation having a predetermined solar radiation direction or more, the correction amount is added to the total solar radiation amount of the left and right solar radiation amounts from the front solar radiation amount detecting means. The obtained front solar radiation amount is compared with the rear solar radiation amount obtained by the rear solar radiation amount detection means, and the larger one is used as the vehicle interior control solar radiation amount.

(Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

In FIG. 3, the vehicle air-conditioning control device includes an air-conditioning duct 12
An inside air inlet 14 and an outside air inlet 13 are provided on the most upstream side of the inside air, and an inside and outside air switching door 15 is arranged at a portion where the inside air inlet 14 and the outside air inlet 13 are separated, and the inside and outside air switching door 15 is operated by the actuator 5. Then, the desired intake mode can be obtained by selecting the air introduced into the air conditioning duct 12 between the inside air and the outside air.

The blower 16 sucks air into the air conditioning duct 12 and blows the air to the downstream side, and an evaporator 17 is arranged behind the blower 16. The evaporator 17, together with a compressor, a condenser, a receiver tank, and an expansion valve (not shown), is pipe-connected to form a refrigeration cycle. A heater core 19 is arranged behind the evaporator 17, and an air mix door 18 is provided on the upstream side of the heater core 19.
By adjusting the opening degree of 18 by the actuator 6, the amount of the air passing through the heater core 19 and the air bypassing the heater core 19 is changed, whereby the temperature of the blown air is controlled.

The downstream side of the air conditioning duct 12 is a defrost outlet.
23, a vent outlet 27, and a foot outlet 24 are opened in the vehicle compartment 47, and mode doors 25a, 25b, 25c are provided at the respective outlets. At the opening of the vent outlet 27, a passenger compartment 47
Right outlet 22R that opens at the right position inside, left outlet 22L that also opens at the left position, and central outlets 21R, 2
Partition plate 28 that is provided with 1L and is placed in the divided part
Left and right air distribution doors 26 are provided in front of. The mode doors 25a, 25b, 25c are controlled by the actuator 7, and the left and right air distribution doors 24 are controlled by the actuator 8, respectively, so that a desired blowout mode and left and right air volume distribution can be obtained.

The actuators 5, 6, 7, 8 and the motor of the blower 16 are controlled based on output signals from drive circuits (not shown), and these drive circuits are microcomputers (not shown). It is connected to the. The drive circuit and the microcomputer constitute a control unit 11 together with an A / D converter and a multiplexer (not shown).

On the other hand, a potentiometer 41 for detecting the opening degree of the air mix door 18, a solar radiation sensor 42 for detecting the amount of insolation on the left and right inserted into the vehicle compartment, an outside air temperature sensor 43 for detecting the temperature of the outside air,
Vehicle interior temperature sensor 44 for detecting the temperature of the vehicle interior, the output signal from the vehicle interior temperature setting device 45 or the like for setting the temperature of the vehicle interior is selected by the multiplexer and input to the A / D converter, After being converted into a digital signal by the A / D converter, it is input to the control unit 11.

The solar radiation sensor 42 has a right-side light receiving element 46R and a left-side light receiving element 46L fixed to two slopes of a roof-shaped sensor base 47, as shown in FIGS. 4 to 6, for example. In addition to the basic structure, a transparent cover 49 is attached so that each of the light receiving elements 46R and 46L faces the left and right sides of the vehicle, and the sensor base 47 is attached to the instrument panel near the windshield 50. It is installed so that it makes an angle of β with respect to the plane of 48.

Next, an example of control operation of the microcomputer constituting the control unit 11 will be described with reference to FIG. 7 as a flowchart of the solar radiation amount calculation routine according to claim 1. Control from the start step 25 is started, signal input output I _R of the solar radiation sensor 42 of the left and right step 52, the I _L in the microcomputer. In the next step 54, it is determined which output of the left and right solar radiation sensors 42 is larger. That is, if I _R −I _L ≧ 0, the output of the right solar radiation sensor I _R
Is greater than or equal to (the amount of solar radiation on the right side of the passenger compartment 47 is greater than or equal to that on the left side), go to step 56, where I _R −
If I _L <0, the output I _L of the left solar radiation sensor is larger (the amount of solar radiation on the left side of the passenger compartment 47 is larger than that on the right side), and the routine proceeds to step 58. In the step 56, the solar azimuth is calculated,
This calculation of the solar azimuth is to obtain the solar azimuth signal SD,
That is, the calculation of SD = (I _R −I _L ) / I _R is performed. Similarly, in step 58, the calculation of the solar radiation direction is performed from SD = (I _L −I _R ) / I _L, and the process proceeds to step 60. In step 60, the solar radiation direction signal SD is a predetermined value SD
Determine if it is less than ₁ . The predetermined value SD ₁ is the 9th
As shown in the figure, I _R +
This is the point where the I _L characteristic line starts to fall sharply, and this value is set appropriately.

That is, in step 60, if the solar radiation direction signal SD is within SD ₁ , the process proceeds to step 62, and the amount of solar radiation may be determined from the I _R + I _L characteristic line. When the solar radiation direction signal SD is larger than SD _{1, the} process proceeds to step 64, and the correction amount 1 is added to the I _R + I _L characteristic line.
Judgment is made based on the characteristic line that is the value obtained by adding + SD, which prevents the conventional decrease in the amount of solar radiation I _O even during uneven solar radiation. This gives a value close to the actual insolation.
Then, the routine returns to the Meihan routine through step 66.

Next, a second embodiment of the present invention will be described.

In this embodiment, in addition to the first embodiment, as shown in FIG. 4, a rear solar radiation sensor 60 is provided near the rear window glass. By providing this rear solar radiation sensor 60, how to determine the solar radiation amount used for air conditioning control is determined from the relationship with the front solar radiation sensor 42.

First, with reference to FIG. 10, a flow chart of the solar radiation amount calculation routine of the second embodiment will be described.

The control is started from step 80, but up to step 94, the forward solar radiation amount I _O is calculated by the same flowchart as in the above embodiment. In step 96, the rear solar radiation sensor
The calculation I _O ′ = K _B · I _B is performed in which the value obtained by multiplying the detected value I _B of S _B by the constant K _B is used as the backward solar radiation amount I _O ′, and the process proceeds to step 98. In step 98, the forward solar radiation amount I _O calculated in step 92 or step 94 is compared with the backward solar radiation amount I _O ′ calculated in the immediately preceding step 96. That is, if I _O ≧ I _O ′, the front solar radiation amount I _O is used as it is, and the process proceeds to step 100 to make the front seat cooling capacity larger than the rear seat cooling capacity,
The process proceeds to the solar radiation direction calculation routine of step 102. I _O <I _O ′
If 'larger in the rear solar radiation I _O as solar radiation amount I _O proceeds to step 104' rear solar radiation I _O after setting the value of the proceeds to step 106. In this step 106, after the rear seat cooling capacity is made larger than the front seat cooling capacity, step 108 is executed.
Stops the front seat air distribution control, and proceeds to return step 112. In the solar azimuth azimuth calculation routine (to be described later) in the front step 102, the solar azimuth azimuth α unique to the front seat portion is calculated based on the output values I _R and I _L of the left and right solar radiant sensors 42. After that, the routine proceeds to step 110, where left and right air flow control near the front seat (described below) is performed according to the incident angle α of the solar radiation calculated at step 102. After that, the process proceeds to the return step 112 and returns to the main routine.

Next, with reference to FIG. 12, a flow chart of the solar radiation direction calculation routine adopted in the second embodiment will be described.

Control is started from step 130, and in step 132, the output values of the left and right solar radiation sensors 42 are compared to determine which side of the vehicle interior the solar radiation amount is on. That is, if I _R −I _L ≧ 0, the output I _R of the right side solar radiation sensor is greater or equal (the amount of solar radiation on the right side in the vehicle compartment is greater than or equal to the left side) and proceeds to step 134, where I _R If −I _L <0, the output I _L of the left solar radiation sensor is larger (the amount of solar radiation on the left side in the vehicle compartment is larger than that on the right side), and the routine proceeds to step 136. Step 134
Then, the above-mentioned insolation azimuth reference value SD and deviant insolation reference value SD ₂ (insolation irradiance reference value when it becomes insolation, for example, SD ₂ = 60 °)
Is compared with and it is determined whether or not the solar radiation from the right side is polarized solar radiation. That is, if (I _R −I _L ) / I _R ≦ SD ₂ , it is determined that it is not insolation and the process proceeds to step 138, where (I _R −I _L ) / I
_{If R} > SD ₂ , it is determined that there is partial solar radiation and the routine proceeds to step 140. At step 138, the solar azimuth reference value the value K _O was constant multiple of the _{SD (I R -I L) /} I R ( where, K _O is K _O ≒ 100 constant) is set as the solar azimuth angle alpha, Return step 1
Proceed to 46. In step 140, the solar azimuth angle α
As a value based on the above-mentioned polarized solar radiation reference value SD ₂ K _O SD ₂ (however, K _O SD ₂
Is a constant and sets K _O ≈100, that is, K _O SD ₂ = 60), and proceeds to return step 146. As a result, the solar azimuth angle α for right-sided insolation is always 60 °. Meanwhile, the step
In 136, similarly to step 134, it is determined whether or not the solar radiation from the left side is the partial solar radiation. That is (I _R −I _L ) / I _L ≦ SD
If it is ₁ , it is determined that it is not insolation and the process proceeds to step 142. If (I _R −I _L ) / I _L > SD ₁ , it is determined that it is insolation and the process proceeds to step 144. In step 142, a value obtained by multiplying the solar azimuth reference value SD by a constant as the solar azimuth angle α-K _O
Set (I _R −I _L ) / I _L (where K _O is a constant and K _O ≈100), and proceed to return step 146. In addition, the above step 1
At 44, a value −K _O SD ₂ (where K _O SD ₂ ≈60) based on the above-mentioned deviation solar radiation reference value SD ₂ is set as the solar azimuth angle α, and the process proceeds to the return step 146. As a result, the solar azimuth angle α at the time of left-sided insolation is always −60 °.

(Effect of the invention) As described above, according to the invention of claim 1, when the solar radiation inserted into the vehicle compartment is biased beyond a predetermined solar radiation direction,
Since the solar radiation amount can be obtained as a value obtained by adding the correction amount to the total solar radiation amount of the left and right solar radiation amounts from the solar radiation amount detection means, the solar radiation correction does not become insufficient during uneven solar radiation as in the past. . In addition, the amount of solar radiation correction does not fluctuate as the direction of solar radiation inserted into the passenger compartment changes from the front of the vehicle to the left and right, and stable air conditioning control is possible regardless of the solar radiation direction, which is comfortable. It is possible to obtain a comfortable air conditioning feeling.

Further, according to the invention of claim 2, one photoelectric conversion element is provided in the rear portion of the vehicle compartment, the solar radiation amounts of the front seat portion and the rear seat portion are respectively detected, and one having a larger solar radiation amount is used for control. The air-conditioning control is performed by adopting it as the amount of solar radiation, and the air-conditioning feeling can be improved.

[Brief description of drawings]

1 is a functional block diagram of claim 1 of the present invention, FIG. 2 is a functional block diagram of claim 2 of the present invention, FIG. 3 is a configuration diagram of the present invention, and FIG. 4 is a state in which a solar radiation sensor is attached. FIG. 5 is a plan view of the vehicle, FIG. 5 is a side view of the solar radiation sensor in a mounted state, FIG. 6 is a perspective view of the same as above, FIG. 7 is a flowchart for calculating the first amount of solar radiation, and FIG. Characteristic diagram of α and solar azimuth signal SD, FIG. 9 shows the first of the present invention.
FIG. 10 is a flow chart for calculating the second amount of solar radiation, FIG. 11 is a second characteristic line diagram of the amount of solar radiation of the present invention, and FIG. 12 is a flow chart for calculating the solar radiation direction. 42 …… solar radiation sensor, 46R …… right side light receiving element, 46L …… left side light receiving element, 100 …… solar radiation amount detection means, 200 …… solar radiation direction signal calculation means, 300 …… deviation solar radiation determination means, 400 …… solar radiation amount Calculation means 500 ... Rearward solar radiation amount detection means, 600 ... Solar radiation amount determination means, 100 '... Front solar radiation amount detection means, 200' ... Front solar radiation direction signal calculation means, 300 '... Front solar radiation determination means , 400 '... Forward solar radiation amount calculation means.

Claims (2)

[Claims] 1. A solar radiation amount detecting device comprising two photoelectric conversion elements for detecting right and left solar radiation amounts to be inserted into a vehicle compartment, and a solar radiation direction calculating a solar radiation direction signal from a detection value of the solar radiation amount detecting means. A signal calculating means, an insolation determining means for determining insolation when the insolation azimuth signal of the insolation azimuth signal calculating means is more than a predetermined value, and a determination by the insolation determining means for the insolation Judgment from the total solar radiation characteristics of the left and right separate solar radiation from, the solar radiation that adds the correction amount in the case of partial solar radiation to the total solar radiation amount of the left and right solar radiation from the solar radiation amount detection means in the case of partial solar radiation A solar radiation amount detecting device for use in an air conditioning controller for an automobile, comprising: a solar radiation amount calculating means for judging from a radiation amount characteristic. 2. A front-left and right-side solar radiation amount detecting means, which is provided in or near the windshield inside the vehicle compartment, and comprises two photoelectric conversion elements for detecting the front-side and left-side solar radiation amounts to be inserted into the vehicle interior, A solar azimuth signal calculating means for calculating a solar azimuth direction signal from the detected value of the forward solar radiation amount detecting means; According to the determination by the insolation determining means, when the insolation is not an insolation, it is determined from the total insolation characteristic of the insolation amount of the front left and right from the front insolation detecting means, and when the insolation is the left and right from the front insolation detecting means. Forward solar radiation amount calculation means that determines from the solar radiation amount characteristic that adds the correction amount in the case of partial solar radiation to the total solar radiation amount of another solar radiation amount, and the rear window glass in the passenger compartment or its vicinity A rear solar radiation amount detecting means provided with one photoelectric conversion element for detecting the rear solar radiation amount to be inserted into the vehicle compartment, a rear solar radiation amount from the rear solar radiation amount detecting means, and the front solar radiation amount detecting means. In comparison with the total amount of solar radiation for each of the front and left sides of the vehicle, a vehicle air-conditioning control device is provided with a solar radiation amount determining means for determining which is the larger amount of solar radiation. Insolation detector used.