JPH05402Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to an air conditioner for automobiles, and in particular, the invention relates to an air conditioner for automobiles, and in particular, the invention relates to an air conditioner for automobiles, and in particular, the invention relates to an air conditioner for automobiles, and in particular, the invention relates to an air conditioner for automobiles, and in particular, the invention relates to an air conditioner for automobiles. The present invention relates to an air conditioner for an automobile that detects solar radiation and performs comfortable air conditioning based on the amount of solar radiation.

(Conventional technology) Generally, in a car, the temperature of the air inside the vehicle is
An air conditioner is installed to control the temperature required by the passengers, but even if the temperature inside and outside the vehicle is the same,
Because the air conditioning feeling felt by the occupants differs depending on the degree of solar radiation, for example,
As disclosed in the publication, the amount of solar radiation is detected by a solar radiation sensor, and the air conditioning state within the vehicle interior is changed according to the detected amount of solar radiation.

This solar radiation sensor 5 is normally provided on the instrument panel 2 on the front of the vehicle 1, as shown in FIG. 5, and receives direct light incident through the windshield 3 and side glass 4, The conditioning device inputs the amount of received light as the amount of solar radiation, and controls the vehicle interior to maintain an optimal air conditioning condition regardless of the degree of solar radiation.

(Problems to be solved by the invention) By the way, in the case of the solar radiation sensor 5 disposed at the above-mentioned position, even if the solar radiation is the same, for example, the direction of travel of the vehicle 1, the altitude of the sun, etc. As a result, the sunlight sensor 5 is often unable to receive direct light, and in such a case, there is a problem that it becomes impossible to maintain an optimal air conditioning condition in the vehicle interior.

That is, the data regarding the solar radiation correction of the air conditioner is the data when the solar radiation sensor 5 is receiving direct light, so when the solar radiation sensor 5 is not receiving direct light, an error occurs in the solar radiation correction. Since the correction amount is only smaller than the original correction amount, the optimal air conditioning condition in the vehicle interior cannot be obtained.

Additionally, in order to solve this problem, a solar radiation sensor is installed inside the aspirator duct 20, which constantly sucks in the air inside the vehicle interior and is normally equipped with an inside air sensor that detects the temperature of the air inside the vehicle interior. However, a technology is being developed that attempts to detect the amount of solar radiation based on the reflected light from outside and outside the vehicle interior that enters the aspirator duct 20. As shown in FIG.
As shown in the graph of the figure, there is a problem in that unbalanced detection is performed on the left and right sides, resulting in detection errors in the left and right directions.

The present invention has been developed in view of these problems, and is made by making the detection characteristics of the light incident on the solar radiation sensor uniform regardless of the direction of travel of the vehicle 1, the altitude of the sun, etc. The purpose is to always be able to accurately detect the amount of solar radiation.

[Structure of the invention] (Means for solving the problem) In order to achieve the above-mentioned object, the present invention provides a system that uses sunlight to generate air in the vehicle inside a duct that is provided inside the vehicle interior and constantly takes air into the vehicle interior. A solar radiation sensor that detects the amount of reflected light from indoors and outdoors is provided, and a reflecting member that guides the reflected light from a predetermined direction to the solar radiation sensor is provided inside the duct.

(Function) With this configuration, the duct 2
Since the reflected light that enters the solar radiation sensor installed inside the vehicle is compensated by the reflective member, the solar radiation sensor can always accurately detect the amount of solar radiation regardless of the direction of travel of the vehicle and the altitude of the sun. Become.

(Example) Examples of the present invention will be described in detail below based on the drawings.

FIG. 4 shows a schematic overall configuration diagram of an air conditioner for an automobile.

As shown in the figure, the intake unit 6 that takes air into the vehicle interior includes an intake door 7 that switches the air taken into the vehicle interior between inside and outside air, and a fan 8 that blows the taken air into the vehicle interior. The fan 8 is driven by a motor 9. A cooler unit 10 having an evaporator 11 is connected to the intake unit 6, and the air sent out from the intake unit 6 is cooled by the cooler unit 10. Furthermore, a heater unit 12 is connected to the cooler unit 10 and includes a heater core 13, a mixer door 14, and a door for opening and closing a passage communicating with each air outlet in the vehicle interior (not shown). Cooler unit 1
The air sent out from 0 is adjusted to the temperature required by the occupants and then blown into the passenger compartment. The intake door 7, the motor 9, the mixer door 14, and a door (not shown) are connected to a control panel 15 for setting the vehicle interior temperature required by the occupants, a solar radiation sensor 16 for detecting the amount of solar radiation, and an outside air sensor for detecting the outside temperature. Sensor group 18 composed of sensors 17, etc.
The controller 19 operates based on signals output from the controller 19.

The control device 19 corrects the opening degree of the mixer door 14 according to the amount of solar radiation detected by the solar radiation sensor 16. For example, when the amount of solar radiation is large, the controller 19 moves the mixer door 14 to the B side in the figure. Mix door 1 is moved to a predetermined opening degree to blow out slightly cold air into the passenger compartment.
4 by a predetermined opening degree to the A side in the figure to blow out slightly warmer air into the vehicle interior, thereby making it possible to respond to changes in the required amount of adjusted heat in the vehicle interior due to the amount of solar radiation. Therefore, the solar radiation detection accuracy of the solar radiation sensor 16 has a great influence on the air conditioning characteristics in the vehicle interior.

A first embodiment of the invention is shown in FIGS. 1-2.

As shown in FIG. 1, the solar radiation sensor 16 is disposed in an aspirator duct 20 provided in the front of the instrument panel 2 in the vehicle interior, and a fan (not shown) is connected to the aspirator duct 20. Intake port 2 that draws air into the vehicle interior
1 is provided. Further, a reflective tape 22 as a reflective member that guides reflected light incident from the inlet 21 to the solar radiation sensor 16 is attached to the inner wall surface of the right side of the aspirator duct 20 and the upper right side of the aspirator duct 20 . In addition, the solar radiation sensor 16 columns,
It is installed parallel to the air intake surface of the suction port 21.

FIG. 2 shows an AA sectional view of the aspirator duct 20 shown in FIG. 1.

As shown in the figure, the solar radiation sensor 16 is installed inside the aspirator duct 20 by a mounting member 23 at an internal position separated from the suction port 21 by a predetermined distance.
There is an inlet 21 on the right side wall and the upper right wall of 0.
A reflective tape 22 is attached to efficiently guide reflected light incident from the solar radiation sensor 16 to the solar radiation sensor 16. The required area of this reflective tape 22 is
This is determined through experiments and the like, taking into consideration various factors related to reflected light specific to the vehicle model in which the 6 is installed.

With this configuration, as shown in the figure, the amount of reflected light from inside and outside the vehicle interior that is reflected from the intake port 21, once reflected on the inner wall of the aspirator duct 20, and then incident on the light-receiving surface 16a of the solar radiation sensor 16 is as follows. Since the amount of reflected light from the wall surface having the reflective tape 22 is smaller than that of the wall surface having the reflective tape 22, it is possible to compensate for the amount of reflected light incident from the left side of the vehicle 1, as shown in straight line A, as shown in FIG. In this way, the detection characteristics of the left side of the vehicle 1 can be brought closer to the detection characteristics of the right side of the vehicle 1.

Thereby, the solar radiation sensor 16 can uniformly detect reflected light from the left and right directions.

In this embodiment, a reflective tape is used as the reflective member, but the present invention is not limited to this, and it goes without saying that any material that can reflect light may be used.

Further, the reflective member may be provided only on the right wall surface in the aspirator duct 20, or only on the upper right wall surface, as long as desired characteristics can be obtained.

. [Effects of the invention] As is clear from the above explanation, according to the invention, the solar radiation sensor can be given the same characteristics for reflected light incident from the left and right directions of the vehicle. Regardless of the direction of travel of the vehicle or the altitude of the sun, the amount of solar radiation can always be accurately detected, thereby maintaining the optimal air conditioning condition in the vehicle interior.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the arrangement of a solar radiation sensor according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a detection characteristic line of the solar radiation sensor according to the present invention. Figure 4 is a schematic configuration diagram of a typical automotive air conditioner, Figure 5 is an explanatory diagram of the installation position of a conventional solar radiation sensor, and Figure 6 is a diagram showing the installation position of a conventional solar radiation sensor. FIG. 1...Vehicle, 2...Instrument panel,
3... Windshield, 4... Side glass, 5
...Solar radiation sensor, 6...Intake unit, 7
... Intake door, 8 ... Fan, 9 ... Motor, 10 ... Cooler unit, 11 ... Evaporator, 12 ... Heater unit, 13 ... Heater core, 14 ... Mixture door, 16a ... Light receiving surface, 20 ... ...Aspirator duct, 21...Intake port, 22...Reflective tape (reflective member), 23...
Mounting parts.

Claims (1)

[Scope of utility model registration request] A solar radiation sensor 16 that detects the amount of reflected light from outside and outside the vehicle interior based on sunlight is provided in a duct 20 that is provided inside the vehicle interior and constantly takes air into the vehicle interior. An air conditioner for an automobile, comprising a reflective light member 22 that guides the reflected light from the solar radiation sensor 16 to the solar radiation sensor 16.