JP2725204B2 - Air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an air conditioner for a vehicle, and in particular, realizes an optimal air-conditioning environment by changing a target set temperature according to the amount of solar radiation. The present invention relates to an air conditioner.

[Conventional technology]

In air conditioners for vehicles, even if the temperature in the cabin is appropriately maintained on average, when there is solar radiation, the passengers feel heat due to the rise in the occupant's perceived temperature due to the solar radiation. The feeling of comfort is impaired.
Therefore, it is necessary to correct the vehicle interior temperature based on the amount of solar radiation.

FIG. 5 shows a schematic configuration of a conventional vehicle air conditioner in which such an amount of solar radiation is corrected.

In the conventional example shown in FIG. 5, first, the temperature in the vehicle compartment is detected by the temperature detecting means 51, and a temperature detection signal is generated. A desired temperature in the vehicle interior is set by the temperature setting means 52, and a temperature setting signal is generated. Next, the temperature detection signal and the temperature setting signal are input to the deviation determining means 53, and a difference between the temperature detection signal value and the temperature setting signal value is obtained to generate a deviation signal. On the other hand, the solar radiation detecting means 54 detects the amount of solar radiation entering the vehicle interior and generates a solar radiation detection signal. The correction means 55 performs correction so as to increase the value of the deviation signal in accordance with the value of the solar radiation detection signal, and generates a correction signal. The integrating means 56 integrates the correction signal over time to generate an integrated signal. The supplied heat amount control means 57 controls the amount of heat to be given to the airflow supplied into the vehicle interior according to the value of the integration signal.

Therefore, according to the device shown in this conventional example, if the setter (occupant) first sets the target temperature and then there is solar radiation, the temperature of the passenger compartment is reduced by the action of the solar radiation correcting means. Since the control is performed so as to be lower than the target set temperature, it is possible to prevent the sensible temperature from rising.

[Problems to be solved by the invention]

As described above, in the conventional air conditioner, the control of the vehicle interior temperature to be lower than the vehicle interior set temperature when there is no solar radiation when the solar radiation is present prevents the rise in the sensible temperature.

However, in practice, when the perceived temperature becomes higher than the vehicle interior temperature due to solar radiation, the setter tends to set the target set temperature lower as a result of feeling that he wants to be cooler.

Therefore, when the above-described solar radiation correction is performed, the vehicle interior temperature becomes lower than an appropriate value, and the occupant often feels cold.

[Object of the invention]

The present invention is to solve such a problem of the related art.

That is, the present invention corrects the deviation between the vehicle interior temperature and the target set temperature in accordance with the change in the amount of solar radiation, thereby appropriately performing the solar radiation correction and preventing the vehicle interior temperature from excessively lowering. To provide an air conditioner,
That is the purpose.

[Means for solving the problem]

According to the present invention, an air conditioner having a vehicle interior temperature sensor and a solar radiation sensor, and a solar radiation temperature setting means, and adjusting a separately installed vehicle interior air conditioning system to a target temperature based on output signals from these components. In an air conditioner provided with harmony control means, the air conditioning control means determines a deviation value between the set vehicle interior temperature target value and the current vehicle interior temperature measurement value, Means for storing a measured amount of solar radiation and calculating a deviation between the stored measured amount of solar radiation and the current measured value of solar radiation; means for correcting the temperature deviation in accordance with the measured deviation of solar radiation; and And means for adjusting the vehicle interior temperature so that the temperature deviation value approaches zero. This aims to achieve the above-mentioned object.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

The embodiment shown in FIG. 1 has a vehicle interior temperature sensor 1, a solar radiation sensor 2, and a target temperature setting means 3, and is separately equipped based on output signals from these components. Conditioning means for adjusting the temperature to the target temperature
It has fifteen. In this case, actually, as shown in FIG. 2, an outside air temperature sensor 10 and an opening degree sensor 13 are provided side by side, and the signals of these sensors 10 and 13 are also input to the air conditioning control means 15. .

The air-conditioning control means 15 further includes a temperature deviation calculating unit 4 as a means for calculating a deviation value between the set vehicle interior temperature target value and the current vehicle interior temperature set value, and a temperature deviation calculation unit 4 for setting the vehicle interior temperature target value. A solar radiation deviation calculating unit 5 as means for storing a solar radiation measurement value and calculating a deviation value between the stored solar radiation amount and the current solar radiation measurement value; and calculating the temperature deviation value in accordance with the solar radiation deviation value. The apparatus includes a deviation value correction unit 6 as a means for correcting and a control circuit unit 7 as a means for adjusting the vehicle interior temperature so that the corrected temperature deviation value approaches zero.

The vehicle interior temperature sensor 1 detects a current temperature in the vehicle interior and generates a signal of a detected temperature value. The solar radiation sensor 2 detects the amount of solar radiation incident on the vehicle interior, and generates a signal of a detected amount of solar radiation. The target temperature setting means 3 sets a target temperature in the vehicle interior and generates a signal of a temperature set value. The temperature deviation calculation unit 4 calculates a deviation between the detected temperature value and the set temperature value, and generates a signal of the temperature deviation value. Solar radiation deviation calculator 5
Stores a solar radiation detection value at the time of setting the vehicle interior target temperature, calculates a deviation between the stored value and the present solar radiation detection value, and generates a signal of the solar radiation deviation value. Deviation correction unit 6
Performs a correction so as to increase the temperature deviation value in accordance with the solar radiation deviation value, and generates a signal of the corrected temperature deviation value. The control circuit unit 7 performs control so that the corrected temperature deviation value approaches “0”, and generates a control signal. The drive unit 8 operated by this control signal drives an actuator or the like (not shown) according to the transmitted control signal,
It functions to change the amount of heat applied to the airflow supplied to the vehicle interior.

FIG. 2 is a block diagram showing an example of the overall configuration of the vehicle air conditioner.

In FIG. 2, an outside air temperature sensor 10 detects an outside air temperature and generates a signal of an outside air temperature detection value. The opening sensor 13 detects the opening of each damper and generates a signal of an opening detection value. The opening degree sensor 13 is connected to an inside / outside air damper described later.
24, air mix damper 28, defroster outlet damper
31, Foot outlet damper 32, Vent outlet damper
It includes all of the opening degree sensors that detect the respective opening degrees of 33.

The signals from these sensors and the target temperature setting means are applied to an analog / digital (A / D) converter 16 in the control circuit section 15 shown in FIG. The analog-to-digital (A / D) converter 16 converts each signal of an outside air temperature detection value, a vehicle interior temperature detection value, an opening degree detection value, a solar radiation detection value, and a temperature set value from an analog signal to a digital signal.

The microcomputer 17 uses a digitized value of each of these signals, and stores a ROM (and RA) (not shown) in advance.
The computer program stored in M) is executed in accordance with the flowchart of FIG.

The driving unit 8 is actually constituted by driving units 18 to 23. The drive unit 18 drives an open / close control motor of the inside / outside air damper 24. The drive unit 19 drives the blower motor 25. The drive unit 20 is an electromagnetic clutch of a cooler compressor
Drive 26. In FIG. 2, reference numeral 27 denotes a cooler evaporator. The drive unit 21 drives an open / close control motor of the air mix damper 28. The drive unit 22 drives a heater valve 29 that controls the heater 30. The drive unit 23 drives the respective open / close control motors of the defroster outlet damper 31, the foot outlet damper 32, and the vent outlet damper 33.

FIG. 3 is a flowchart for the operation of the air conditioning control means 15.

First, a set temperature, a vehicle interior temperature, and other signal values are input (step S1). Next, the detected value of the amount of solar radiation at the time of input of the set temperature is stored as the initial amount of solar radiation (step S
2). Next, a temperature difference blood is obtained by subtracting the set temperature value from the vehicle interior temperature detection value (step S3). However, in actual control, the vehicle interior temperature detection value may be subtracted from the set temperature value. Next, the initial solar radiation is subtracted from the solar radiation detection value to obtain a solar radiation deviation value (step S
Four). It is determined whether or not the insolation deviation value is "0" (step S5). If not, the temperature deviation value is corrected (step S6). Then, PID control is performed (step S
7) Output a drive signal to each drive unit.

FIG. 4 shows an example of the characteristic of the corrector 6, and shows that the solar radiation amount deviation ΔH and the correction temperature T have a linear relationship. The value obtained from the map shown in FIG. 4 is substituted into the following equation, whereby the corrected temperature deviation value Te 'can be obtained.

Corrected temperature deviation (Te ′) = Temperature deviation (Te) −Corrected temperature (ΔT) [Effects of the Invention] As described above, according to the present invention, even though the temperature in the vehicle compartment is properly maintained. This eliminates the problem that the occupants feel discomfort in the air conditioning environment in the vehicle due to the rise in the perceived temperature caused by the solar radiation, and even if the occupant changes the set temperature according to the perceived temperature, the conventional air conditioning with insolation Unlike the device, it is possible to provide an unprecedented excellent air conditioner capable of preventing the temperature in the vehicle compartment from excessively lowering and realizing an optimal air-conditioning environment according to the amount of solar radiation.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the invention, FIG. 2 is a diagram showing an example of the overall configuration of a vehicle air conditioner, FIG. 3 is an operation flowchart of a control unit, and FIG. FIG. 5 is a diagram showing an example, and FIG. 5 is a diagram showing a schematic configuration of a conventional vehicle air conditioner. 1 ... indoor temperature sensor, 2 ... insolation sensor, 3 ... target temperature setting means, 4 ... temperature deviation calculating unit, 5 ... insolation amount deviation calculating unit, 6 ... deviation value correcting unit, 7 ... Control circuit,
8 ... Driving means.

Claims (1)

(57) [Claims] An air conditioner having a vehicle interior temperature sensor and a solar radiation sensor, and a target temperature setting means for adjusting a separately installed vehicle air conditioning system to a target temperature based on output signals from these components. In the air conditioner provided with a harmony control means, the air conditioning control means calculates a deviation value between a set vehicle interior temperature target value and a current vehicle interior temperature measurement value, and the vehicle interior temperature target value setting Means for storing the solar radiation measurement value at the time and calculating a deviation value between the stored solar radiation amount and the current solar radiation amount measurement value, means for correcting the temperature deviation value according to the solar radiation amount deviation value, Means for adjusting the vehicle interior temperature so that the corrected temperature deviation value approaches zero.