JPS63284014A - Airconditioner for vehicle - Google Patents

Abstract

PURPOSE:To sense the temp. in a cabin precisely and secure fine airconditioning effect by correcting the sensed temp. by a temperature sensing means in the cabin by and by with the portion of temperature rise which is due to illumination lighted with turning-on of the light switch. CONSTITUTION:This arrangement includes a means 101 to make setting of the temp. in the cabin and a means 102 to make sensing of the same. Further is installed a means 103 which makes control so that the temperature in the cabin sensed by this means 102 will be in correspondence with the temperature in the cabin set by the means 101. Another means 104 corrects by and by that portion of temp. rise at the installation place of the sensing means 102 which is due to cabin illumination lighted with turning-on of the light switch of the vehicle. This will compensate the sensing error of the sensing means 102 which is eventually installed in the place where temperature is raised by the illumination to serve securement of fine airconditioning effect based on precise cabin temperature.

Description

[Detailed description of the invention] [Industrial Application Field J The present invention relates to an air conditioner for a vehicle.

[Prior Art] As a conventional vehicle air conditioner, for example,
The one described in Japanese Patent No. 8812 is known.

In this type of vehicle air conditioner, the vehicle interior temperature detected by a room temperature sensor is controlled so as to match a set temperature while taking various conditions such as outside temperature and solar radiation into consideration.

When detecting room temperature, it is necessary to avoid the influence of external disturbances such as the occupant's seating posture, seating position, airflow volume, airflow mode, outside air temperature, and amount of solar radiation. For this reason, the room temperature sensor is generally installed in the heater control panel of the cluster center, which is less affected by these disturbances.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional vehicle air conditioner, the east room temperature sensor was provided in the heater control panel, and therefore there were the following problems.

That is, when the light switch is turned on when driving at night, the lights of various instruments on the instrument panel, the audio device, the air conditioning unit, etc. are turned on. Therefore, the temperature around the panel increases due to the lighting. Therefore, the room temperature sensor provided in the heater control panel section detects the temperature including the temperature increase caused by the lighting as the room temperature. the result,
As shown in FIG. 8, there was an inconvenience that the temperature in the v section was controlled to be lower than the set temperature.

In addition, in order to eliminate the above problem, it is possible to install the room temperature sensor in a position where it will not be affected by illumination, but the influence from other disturbance elements as mentioned above is much greater, and other disturbance elements There is a problem in that it is difficult to perform temperature correction for

(Object of the Invention) The present invention has been made in view of the above-mentioned problems.The purpose of the present invention is to correct the temperature rise at the room temperature sensor mounting position caused by illumination lighting, and to maintain the vehicle interior temperature at the set temperature. An object of the present invention is to provide a vehicle air conditioner that can prevent the following from occurring.

[Summary of the Invention] In order to achieve the above object, the present invention provides a vehicle interior temperature setting means 101 for setting the temperature in the vehicle interior, as shown in FIG.
and vehicle interior temperature detection means 102 for detecting the temperature inside the vehicle interior.
and i, IJ1!1 means 103 for controlling the detected vehicle interior temperature to match the set vehicle interior temperature;
It is provided with a correction means 104 that gradually corrects the temperature rise at the installation location of the vehicle interior temperature detection means caused by the illumination inside the conductor that is turned on in conjunction with the lighting operation of the light switch of the vehicle.

[Example 1 An embodiment of the present invention will be described below based on the drawings.

FIG. 2 is a block diagram showing the configuration of an embodiment of the apparatus according to the present invention, and FIG. 3 is a mechanical explanatory diagram of the air conditioner in this embodiment.

As shown in FIG. 3, the mechanism of the air conditioner of this embodiment includes an intake door 2 provided at the air intake side n port of the duct 1 to switch between outside air introduction and inside air circulation, and a door 2 that takes in outside air or inside air and opens the duct. A proa fan 3 that sends the air to the downstream side, an evaporator 4 that cools the air that is sent, a heater core 5 that heats the air that is sent, and a differential door 6, a vent door 7, and a vent door 7 that are provided at the defroster opening, ventilator opening, and foot opening, respectively. It is equipped with a foot door 8.

Further, an air mix door 9 is provided immediately before the heater core 5 on the upstream side. This air mix door 9 adjusts the amount of air heated through the heater core 5 and the amount of air sent directly downstream without going through the heater core 5 by adjusting the door opening degree, and blows air at a desired temperature into the vehicle interior. The purpose is to ensure that

The opening degree of the air mix door 9 is controlled by a power servo actuator 11 controlled by a solenoid valve 10.
It is carried out by

Further, this power servo actuator 11 is provided with an air mix door opening sensor 12. The air mix door opening sensor 12 is configured, for example, by a potentio balance register (PBR) that outputs a resistance value that changes in conjunction with stroke changes of the power servo actuator 11 as a door distance detection signal.

On the other hand, as shown in FIG. 2, the control system in this embodiment includes a room temperature setting device 13 that presets a target temperature inside the vehicle;
It includes a room temperature sensor 14 that measures the temperature inside the vehicle, an outside air temperature sensor 15 that measures the outside air temperature, and a solar radiation sensor 16 that measures solar seedlings.

In addition, especially in this embodiment, a headlight sensor 17 is provided to detect whether the headlight switch is on or off, and as will be described later, the temperature rise due to the illumination lighting that is turned on when the headlight is turned on is detected. Used when making corrections.

As shown in FIG. 4, the room temperature sensor 14 is located at a cluster center 19 in the instrument panel 18, which is less affected by disturbances such as the seating posture or position of the occupant, the airflow volume, the airflow mode, the outside temperature, and the presence or absence of solar radiation. It is provided in the heater control panel section 20. This cluster sensor 19 incorporates the switch section of the air conditioner main body and the audio set 21 of this embodiment. These heater control panel section 20 and audio set 21
etc., each illumination light is turned on in conjunction with the ON operation of the light switch 22.

The set temperature signal S1 of the room temperature setting device 13, the room temperature detection signals 82. of the various sensors 14, 15, 16 and 17.
Outside temperature detection signal 83. The solar radiation amount detection signal S4 and the light-on signal S5 are taken into the control JJPA calculating section 24 via the AD converter 23.

The control section 24 receives the room temperature setting signal S1. Room temperature detection signal 82. A target outlet temperature calculation section 25 takes in the outside temperature detection signal S3 and the solar radiation m detection signal $4 and calculates the target outlet temperature TO, and an air mix door is used to obtain the target outlet temperature TO calculated by the operation section 25. The target air mix door opening calculating section 26 calculates the opening of 9.

The target outlet temperature calculating section 25 calculates the target outlet temperature To based on the following equation (1).

To =A-Tp-B-TA-C-Ts+D・(Tp
-Tt) ... (1) However, TP is the set temperature and TA is the detected outside air temperature.

TS is solar radiation detection m, TI is vehicle interior detection temperature, and
AD is a constant determined by the vehicle and the like.

The target air mix door opening degree calculating section 26 calculates the target opening degree XO of the air mix door 9 from the target blowing temperature To calculated by the target blowing temperature calculating section 25 as Xo = f (T
o ) is calculated using the functional formula.

In addition, in this embodiment, the correction mE is used to correct the temperature rise of the room temperature sensor 14 caused by the illumination lamp that is turned on in conjunction with the ON operation of the headlight switch 22.
A correction section 27 is provided in which fΔl''dt is stored in advance.

When the light-on signal S5 from the headlight sensor 17 is input via the A/D converter 23, the correction fltE△Tdt stored in the correction section 27 is taken into the target air temperature calculation section 25. Then, the target blowout temperature Toff1n is determined by the following equation (2).

To =A-Tp-B-TA-C-Ts+D・(TP
-TI') +E-f△T-dt...
(2) The target air mix door opening degree Xo determined by the control calculation section 24 is supplied to the comparator 28. The comparator 28 is supplied with a door opening detection signal S6 from the air mix door opening sensor 12 via an A/D converter 29 as a detected opening X1. And this comparator 2
8 compares the target opening Xo and the detected opening X+ and supplies an operation IPV corresponding to the deviation to the air mix door drive circuit 31 via the D/A converter 30.

The air mix door drive circuit 31 drives the air mix door drive section 31 which is composed of the solenoid valve 10 and the power servo actuator 9 described above, and if the target opening degree Xo > the detected opening degree X1, one of the solenoids 10 is activated. Open to the atmosphere and operate the air mix door 9 to the pot side (open side) using the actuator 11 to reach the target opening X.
Control is performed so that o=detected opening degree X1. In addition, if the target opening degree XO<detected opening degree
Control is performed so that the opening degree is o-detected opening X1.

Next, the operation will be explained with reference to the flowchart shown in FIG.

When the air conditioner switch is turned on, the set temperature of - from the temperature setting device 13 and the room temperature sensor 14. Outside temperature sensor 15
and each detection signal from the solar radiation sensor 16 is sent to the A/D converter 2.
1 to the control calculation unit 24, and the detection signal $6 from the air mix opening sensor 12 is input to the comparator 28 as the detected opening X1 via the A/D converter 29 (step 601-603).

When the light switch 22 is not turned on, such as during daytime driving (step 604, negative), the target air outlet temperature To is calculated by the target air outlet temperature calculation unit 25 as shown in equation (1) above ( Step 605).

Then, the target air mix door opening degree calculation unit 26 calculates the target air mix door opening degree Xo so as to obtain the calculated target blowout temperature To (step 606), and the air mix door 9 is set to the target opening degree XO=detected open. It is controlled so that the degree is X1.

When the light switch 22 is turned on when driving at night, the detection signal S5 from the light switch sensor 17 is output to the calculation control section 24, and the correction faE in the correction section 27 is output.
fTdt is transferred to the target outlet temperature calculation section 25. Then, the target blowing temperature To with the correction taken into account is set to the (second)
) (step 608).

Then, a target air mix door opening degree Xo is calculated based on this target blowout temperature TO (step 606),
The opening degree of the air mix door 9 is controlled (step 6).
07).

FIG. 6 shows the change in room temperature over time in this example.

When the light switch 22 is turned on, the illumination light is turned on in conjunction with this, and the ambient temperature at the setting location of the room temperature sensor 13 gradually rises. In this embodiment, this rise is corrected and the headlights are turned on. You can see that the room temperature remains the same as before.

Therefore, according to this embodiment, the room temperature can be kept constant without causing an overshoot as in the case where there is no integral term when the correction plane is cast all at once as shown in FIG.

In this embodiment, an integral term of the temperature set in advance is used as the correction amount, but it is also possible to use a differential term.

[Effects of the Invention] As explained above, according to the present invention, since the temperature increase in the vehicle interior 234 detection means due to the illumination lighting that is turned on in conjunction with the lighting of the light switch is gradually corrected, the room temperature is actually The room temperature is controlled above the target temperature so that the room temperature does not drop and a comfortable temperature space can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of the present invention, FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 3 is a configuration diagram of a mechanical part of a vehicle air conditioner in the same embodiment, and FIG. 4 5 is a flowchart showing the processing procedure of the same example, FIG. 6 is a characteristic diagram showing the temperature characteristics of the same example, and FIG. 7 is a diagram showing no integral term. FIG. 8 is a characteristic diagram showing the temperature characteristics of the conventional example. 9... Air mix door 13... Room temperature setting device 14
...Room temperature sensor 15...Outside temperature sensor 16...
Solar radiation sensor 17... Headlight sensor 24...
Arithmetic control unit 27...Correction unit 28...Comparator agent Patent attorney Tamotsu Miyoshi Male female S 3 Figure 4 Figure 5 Oti work Figure 6

Claims (1)

[Claims] Vehicle interior temperature setting means for setting the temperature in the vehicle interior, vehicle interior temperature detection means for detecting the temperature in the vehicle interior, and the detected vehicle interior temperature matching the set vehicle interior temperature. and a correction means that gradually corrects a temperature increase at the installation location of the vehicle interior temperature detection means caused by the vehicle interior illumination lighting that is turned on in conjunction with the lighting operation of a light switch of the vehicle; A vehicle air conditioning system comprising: