JPS62168706A - Air-conditioning provided with solar radiation sensor for vehicle - Google Patents

Abstract

PURPOSE:To aim at optimizing the control of air-condition without being restrained by the characteristic of a solar radiation sensor, by compensating the output characteristic of the solar radiation sensor which is specified only by the incidence angle of sunlight in relation to the actual quantity of solar radiation to the driver. CONSTITUTION:A solar radiation sensor 1 is disposed in the vicinity of the driver's seat in an automobile with the sensing surface of the sensor 1 being laid in the substantially horizontal direction, and a vehicle air-conditioning device 2 is controlled in accordance with the output of the sensor 1. In the above-mentioned arrangement, an output compensating circuit 3 increases the output level of the solar radiation sensor 1 in accordance with a predetermined coefficient value. Further, an output limit means 5 compares the compensating value from the circuit 3 with a predetermined set value from a set value memory means 4, and if the compensating value exceeds the set value, the air-conditioning device 2 is controlled in accordance with the set value by means of a switch means 6. With this arrangement, the output characteristic of the solar radiation sensor 1 which is specified only by the incidence angle of the sunlight is compensated in relation to the actual quantity of solar radiation to the driver.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides an air conditioner with a
This is an air conditioner with an RQ and a window attached to the city of Hakumen which controls the mountain-shaped air conditioner.

(Prior art) In general, automobiles provide a comfortable riding environment for passengers regardless of the climate (especially temperature) and driving conditions, and also ensure the driver's visibility by preventing fogging and frost on the windows. Air conditioning equipment is installed to ensure safe and comfortable driving. By the way, recent air conditioners (hereinafter referred to as air conditioners) have an automatic control function that automatically controls the air conditioning capacity of the air conditioner according to changes in outside temperature and solar radiation. (commonly known as automatic air conditioners) are becoming more common. This type of air conditioner is conventionally described in, for example, Japanese Utility Model Application Publication No. 60-85208.

The conventional technology described in this publication first detects the temperature of the air inside the vehicle (interior temperature) and controls the basic air conditioning capacity of the air conditioner. An infrared sensor is installed, and this infrared sensor detects the amount of solar radiation.By further correcting the basic air conditioning capacity control based only on the temperature described above based on a predetermined relationship, it is possible to monitor not only the actual temperature of the air inside the vehicle but also the amount of solar radiation. It is intended to perform highly accurate temperature, humidity, and airflow control taking into account the actual sensible temperature.

(Problems to be Solved by the Invention) By the way, since the infrared sensor as a solar radiation sensor in the above-mentioned prior art is installed on the roof, it cannot be used to detect the direction in which the vehicle itself is traveling with respect to the sun. However, as long as it is at a certain time of the day, sunlight (its infrared rays) can be received at a more or less constant angle of incidence. Therefore, the output value is also maintained substantially constant depending on the solar radiation m.

However, this has the following problems. In other words, if the sensible temperature is also taken into account as mentioned above, the driver (in principle, in this invention, we will mainly consider the driver) is facing the sun when driving in the morning or at sunset, when the driver is fully exposed to direct sunlight. If the amount of incident light that enters the solar sensor is constant in each case, such as when the vehicle is driving and when the vehicle is traveling in the opposite direction, or when the sun is located almost directly above the vehicle such as at noon, The irradiation m actually irradiated to the driver differs greatly depending on the position of the roof of the automobile. Therefore, if the solar radiation sensor is provided in the roof portion as in the above-mentioned prior art, the original effect cannot be expected much.

Therefore, as shown in FIG. 4, for example, the solar radiation sensor 3 is horizontally installed near the driver's seat, for example, on the dash board (2), especially on the cluster switch cover 2, and the solar radiation sensor 3 is installed horizontally on the driver's seat, for example, on the cluster switch cover 2. It is being considered to detect the amount.

However, in this case as well, in addition to the above-mentioned problems, the following points arise. In other words, the solar radiation sensor 3 described above generally employs a junction type semiconductor photoelectric element such as a photodiode, but the light-receiving surface of such a photoelectric element is usually formed flat, and its characteristics are the same. Even if the light has a radiant intensity (illuminance), its output characteristics (photovoltaic force characteristics) differ depending on the incident angle θ of the light. In other words, the electromotive force (output) is large when the incident angle θ of light to the light receiving surface is large (close to 90°), and the electromotive force is small as the incident angle 0 becomes small (fifth (see figure).

Therefore, in view of the positional relationship between the driver's seat and the vehicle roof, the incident angle θ of sunlight on the solar radiation sensor 3 is the maximum (90°).
At this time, even though the driver itself is hardly irradiated with sunlight, the output of the solar radiation sensor 3 is maximized and the air conditioning capacity is controlled to the maximum increase side, while the incident angle θ is smaller than that. When the solar radiation angle 0 in Figure 5 reaches the range of 20° to 60°, where the driver is fully irradiated with sunlight, the output of the solar radiation sensor 3 decreases, and the air conditioning capacity is controlled to the reduced side. This results in control inconsistent with actual requirements.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the above-mentioned problems, and includes providing a solar radiation sensor near the driver's seat of an automobile with the sensor surface substantially horizontal. In an air conditioner with a solar radiation sensor for a vehicle that controls a vehicle air conditioner according to the output of the solar radiation sensor, an output correction circuit that increases the output level of the solar radiation sensor based on a predetermined coefficient value; and output limiting means for comparing the correction value of the output correction circuit with a predetermined set value and controlling the air conditioner with the set value when the correction value is greater than or equal to the set value. .

(Function) According to the above means, as a result, the output characteristic of the solar radiation sensor, which is originally specified only by the incident angle of sunlight, is corrected in relation to the actual solar radiation to the driver.
Optimal control of air conditioning capacity can be achieved centering on the driver without being restricted by the output characteristics of the solar radiation sensor.

(Example) FIGS. 2 and 3 show an air conditioner with a solar radiation sensor for an automobile according to an example of the present invention.

First, FIG. 2 schematically shows the configuration of the hardware part of an air conditioner equipped with the solar radiation sensor, and the air conditioner consists of compressors 10. Condenser (condenser) IL evaporator (
evaporator) 12, etc., a heating system consisting of a hot water valve 20, a heater core 21, etc. connected to each other by a hot water pipe (connected to an engine cooling water pipe), a blower unit 30, Inside/outside air switching motor 31
, a ventilation system device including a ventilation duct 32, an operation system device 40 including a temperature setting device, operation switches, etc., and an air conditioning control unit 50 formed by a microcomputer. It is composed of a control system device including an outside temperature sensor 51, an inside temperature sensor 52, a water temperature sensor 53, a duct sensor 54, a solar radiation sensor 3, various control motors (mode switching motor 61, air mix damper control motor 62), etc. . and the evaporator 1 of the cooling system device.
2 and the heater core 2I of the heating system device are installed, for example, in each unit case 6.7 provided below the dash panel, and each unit case 6.7 is connected to the unit case 6.7 through the duct part 5. interconnected. A blower duct 32 of the blower unit '1 knee 30 of the blower system is also connected to the unit case 6 side. Further, on the side of the unit case 7, a heat duct 15 for heating and a vent duct 16 for ventilation and cooling are provided. Further, reference numeral 17 denotes an air mix damper rotatably mounted on one end of the heater core 21 and located within the duct portion 5 to open and close the passage.
The opening is controlled by the control motor 62, and the actual opening is detected by the potentiometer 63, and the detected value is input to the air conditioning control unit 50. Further, the symbol E indicates an engine, and the compressor 10 of the cooling system is driven by this engine E.

Next, FIG. 3 shows the air conditioning capacity control operation of the air conditioning control unit 50 shown in FIG. 2 above.

First, in step S1, data signals for general temperature adjustment such as outside temperature and inside temperature, excluding the output of the solar radiation sensor 3, are manually input, and in step S, a comprehensive signal (control signal for each part of the air conditioner) necessary for temperature adjustment is input. ) Calculate TF.

Next, the process proceeds to step S3, where the output Vo of the solar radiation sensor 3 described above is input, and the process further proceeds to step S4, where the output VO of the solar radiation sensor 3 is multiplied by a predetermined coefficient (larger than 0) K, thereby obtaining the solar radiation. Correction is made to increase the output of sensor 3. This correction is performed, for example, by specifically increasing the gain of an amplifier circuit that amplifies the output of the solar radiation sensor. In this case, the above coefficient value is determined for the purpose of correcting the output characteristics of the sensor due to the difference between the actual amount of solar radiation for the driver and the output of the solar radiation sensor 3, as described above. Therefore, the relationship between the characteristic and the incident angle θ of sunlight should be thoroughly measured and studied.

Furthermore, the process proceeds to step S5, and the step S
The correction value (Vo・+<) at 4 is the predetermined setting value VO3
(See FIG. 5). As a result, in the case of YES, the process proceeds to step S7 and the above-mentioned comprehensive signal TF is corrected by the set value Vo, (this value is the maximum value based on the original output characteristics of the solar radiation sensor 3), while on the other hand, in the case of NO In step S6, the correction value Vo-
K modifies the above-mentioned general signal T.

Thereafter, based on the modified general signal TF'', air mix control (air mix damper control: step Sa), wind m control (step SS), compressor control (step S+O), blowout mode control (steps S, . . . ) , inside/outside air introduction control (step 5I2
), etc., are performed in sequence.

By doing the above, for example, as shown in FIG. 5, even though the output of the solar radiation sensor 3 is originally small in the range of solar radiation angle θ of 20° to 60°, the amount of solar radiation to the driver is actually large. Even in this case, the output is corrected to increase based on a predetermined coefficient value within that range, so that the air conditioning capacity is controlled in accordance with the actual amount of solar radiation.

As described above, as a correction means for correcting the output characteristics of the solar radiation sensor itself in accordance with the angle of incidence of sunlight on the solar radiation sensor, the gain of the amplifier circuit is set particularly large as in the above-mentioned embodiment. In addition to means for saturating the output at the level, for example, an input level determination function may be added to the air conditioning control unit itself, and the case where the input level is equal to or higher than a certain level may be determined as a saturation value.

(Effects of the Invention) As explained above, the present invention provides a solar radiation sensor near the driver's seat of an automobile with the sensor surface substantially horizontal, and controls a vehicle air conditioner according to the output of this solar radiation sensor. In an air conditioner equipped with a solar radiation sensor for a car,
An output correction circuit that increases the output level of the solar radiation sensor based on a predetermined coefficient value, and a correction value of this output correction circuit is compared with a predetermined setting value, and if the correction value is greater than or equal to the setting value, the corresponding and output limiting means for controlling the air conditioner with a set value.

Therefore, according to the present invention, the output characteristic of the solar radiation sensor, which is originally specified only by the incident angle of sunlight, is corrected in relation to the actual solar radiation m to the driver.
Optimal control of air conditioning capacity centered on the driver's cab can be achieved without being restricted by the output characteristics of the solar radiation sensor.

[Brief explanation of drawings]

Fig. 1 is a diagram corresponding to claims of the present invention, Fig. 2 is a system configuration diagram of an air conditioner equipped with a solar radiation sensor for an automobile according to an embodiment of the present invention, and Fig. 3 is a control diagram of an air conditioning control unit of the same device. FIG. 4 is a flowchart showing the operation, FIG. 4 is a perspective view showing the installation state of the solar radiation sensor in the device of the same embodiment, and FIG. 5 is a graph showing the output characteristics of the solar radiation sensor. 3 ... Solar radiation sensor 10 ... Compressor II ... Capacitor I2 ... Everbore 21 ... Heater core 30 ... Prower unit 50 -- -・Fist air conditioning control unit as shown in Figure 4 and Figure 5.

Claims (1)

[Claims] 1. In an air conditioner with a solar radiation sensor for an automobile, a solar radiation sensor is provided near the driver's seat of the automobile with a sensor surface substantially horizontal, and the vehicle air conditioner is controlled according to the output of the solar radiation sensor, the solar radiation sensor as described above. an output correction circuit that increases the output level of the output based on a predetermined coefficient value;
It is characterized by being provided with output limiting means for comparing the correction value of the output correction circuit with a predetermined set value, and controlling the air conditioner with the set value when the correction value is greater than or equal to the set value. An air conditioner equipped with a solar radiation sensor for automobiles.