JPH07172142A - Blasting amount controller of vehicular air conditioner - Google Patents

Abstract

PURPOSE:To automatically supply the wind capacity matching the taste of a passenger by learning the automatically controlling blasting amount to which the calculated increase wind capacity is added by a blast amount manually setting means in the DEF mode of a vehicular air conditioner every time the preset DEF wind capacity is changed. CONSTITUTION:A blasting amount controller is composed of a control signal calculating means 100 for calculating a control signal according to the environmental condition, a DEF mode setting means 110, a blasting amount manually setting means 120, an automatic wind capacity calculating means 130 for calculating the automatic controlling wind capacity, a increased wind capacity calculating means 140, and a rotational driving control means 150 of blower Moreover it is provided with a changed wind capacity calculating means 160 for calculating the changed blasting amount when the set wind capacity is changed by the blasting amount manually setting means 120, an environmental condition recognizing means 170, an increased wind capacity learning means 180 for changing the increased wind capacity characteristic of the increased wind capacity calculating means 140 on the basis of the changed wind capacity calculated by the changed wind capacity calculating means 160 in relation to the environmental condition learned by the environmental condition recognizing means 170.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air flow rate control for supplying air to a passenger compartment, and more particularly to a control device for adjusting the air flow rate when a blowing mode is a defrost mode.

[0002]

2. Description of the Related Art As a device for controlling the air flow rate, for example, a device disclosed in Japanese Patent Application Laid-Open No. 60-4409 is known. This is to set the blowing air volume to the minimum level when the temperature difference between the vehicle interior temperature and the set temperature is equal to or less than a predetermined value, and particularly when the blowing mode is the defrost mode, the blowing air volume at the minimum level is set to a predetermined value. I tried to raise it. As a result, the ability to clear the cloud in the defrost mode can be enhanced.

[0003]

However, in the above-mentioned technique, since the air volume increasing in the defrost mode (DEF mode) is a predetermined uniform value, the increased DEF air volume is at all levels. It was not always satisfactory to the crew. In other words, some people want to increase the air volume in order to speed up the cloudiness, or want to reduce the air volume in order to reduce the blower operating noise even if the clouding ability is slow, so the DEF that suits the occupant's taste is desired. It was not always possible to supply the air volume.

Therefore, in the present invention, the optimum air volume in the defrost mode is learned so that the air volume suitable for the occupant's taste is automatically supplied, and the trouble of changing the air volume in the defrost mode is eliminated. An object is to provide an air flow rate control device for a vehicle air conditioner.

[0005]

SUMMARY OF THE INVENTION Therefore, the gist of the present invention is, as shown in FIG. 1, a control signal calculation means 100 for calculating a control signal of an air conditioner according to environmental conditions, The defrost mode setting means 110 for setting the blowout mode to the defrost mode, the airflow rate manual setting means 120 for manually setting the airflow rate blown into the vehicle interior, and the automatic airflow rate for calculating the airflow rate for automatic control based on the control signal. The calculating means 130, the increasing air quantity calculating means 140 for calculating the increasing air quantity in the defrost mode, and the automatic air quantity calculating means 1 when the blowout mode is set to the defrost mode by the defrost mode setting means.
Drive control means 1 for driving and controlling the rotation of the blower so as to obtain an air flow rate obtained by adding the increased air flow rate calculated by the increased air flow rate calculation means 140 to the automatic control air flow rate calculated by 30
50, a change air volume calculation means 160 for calculating the changed air volume when the air volume is manually set by the air volume manual setting means 120, and a set air volume is changed by the air volume manual setting means 120. With respect to the environmental condition recognition means 170 for recognizing the environmental condition and the environmental condition learned by the environmental condition recognition means 170, the increased air volume calculation means 140 based on the changed air volume calculated by the changed air volume calculation means 160.
And an increasing air flow rate learning unit 180 for changing the increasing air flow rate characteristic.

[0006]

Therefore, in the defrost mode, the air flow rate is the sum of the automatic control air flow rate calculated by the automatic air flow rate calculation means 130 and the increased air volume calculated by the increased air volume calculation means 140. When the set air volume is changed by 120, the changed air volume calculation means 16
Since the air volume characteristic to be increased in the defrost mode is changed based on the changed air volume calculated at 0 and the environmental condition at that time, if the occupant does not like the current DEF air volume and changes the air flow volume manual setting means 120, The environmental conditions at that time are recognized and the air volume can be changed to match the setting change,
After that, the changed DEF air volume is supplied under the environmental condition. That is, each time the setting of the DEF air volume is changed, the learning is performed and the characteristics are changed according to the taste of each person. Therefore, the above-mentioned problem can be achieved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 2, the vehicle air conditioner is provided with an intake door switching device 2 on the most upstream side of the air conditioning duct 1, and the intake door switching device 2 is divided into an inside air inlet 3 and an outside air inlet 4. An inside / outside air switching door 5 is arranged in the portion, and the inside / outside air switching door 5 is operated by an actuator 6 to select the air to be introduced into the air conditioning duct 1 between the inside air and the outside air, so that a desired intake mode can be obtained. You can get it.

The blower 7 sucks air into the air conditioning duct 1 and blows the air downstream, and an evaporator 8 is arranged behind the blower 7. The evaporator 8 is connected to a compressor, a condenser, a receiver tank, and an expansion valve by piping to constitute a refrigeration cycle.

A heater core 9 is arranged behind the evaporator 8, and an air mix door 10 is provided on the upstream side of the heater core 9, and the air mix door 1 is provided.
By adjusting the opening degree of 0 by the actuator 11, the ratio of the air passing through the heater core 9 and the air bypassing the heater core 9 can be changed.

The most downstream side of the air conditioning duct 1 is
The defrost outlet 12, the vent outlet 13, and the foot outlet 14 open to the vehicle interior, and each of the outlets 12
Mode doors 15a provided in separate parts of
The blowing mode can be changed by controlling the opening and closing of 15b by actuators 16 and 17.

The various doors 5, 10, 15a,
15b, the motor 7a of the blower 7 is controlled based on a signal from the control unit 39. The control unit 39 includes drive circuits 40a to 40d that drive and control the blower, a microcomputer 41 that controls the drive circuits 40a to 40d, an A / D converter 42 that inputs a signal to the microcomputer 41, and a multiplexer ( MPX) 43, etc., which is a well-known one having an input circuit, etc.
Includes a central processing unit (CPU), ROM, RAM and the like. In the input circuit of the control unit 39, in addition to the signal from the vehicle interior temperature detection sensor 42 that detects the vehicle interior temperature Tr, a signal from the outside air temperature detection sensor 43 that detects the outside air temperature Tam and the amount of solar radiation Qs are detected. Solar sensor 44
From the temperature setter 45 for adjusting the set temperature Tset in the vehicle compartment.
Further, a signal is input to the microcomputer 41 from an operation panel 46 having an air volume operation unit 47 for manually setting the air flow rate and a blowout mode operation unit 48 for setting the blowout mode.

In FIG. 3, an example of air conditioning control by the control unit 39 is shown as a flow chart,
The control unit 3 will be described below.
In step 50, various signals such as the vehicle interior temperature Tr, the outside air temperature Tam, the amount of solar radiation Qs, and the set temperature Tset and signals from the operation panel 46 are input in step 50, and in the next step 52, the following mathematical expression (1) is input. Based on, the total signal T is calculated as a reference signal for controlling each air conditioner.

[0014]

## EQU1 ## T = (Tr-25) + Kam (Tam-25) +
Ks * Qs-Kset (Tset-25) + C

Here, Kam, Ks, and Kset are gains added to the term of outside temperature, the term of insolation, and the term of set temperature, respectively, and C is a correction term.

In step 54, the automatic control air flow rate (automatic air flow rate: VB _AUTO ) supplied to the blower 7 is obtained based on the comprehensive signal T in the form of a drive voltage so as to obtain the characteristics shown in FIG. This characteristic itself is well known, and the amount of air blown is small in the intermediate region of T, and the amount of air blow becomes large as T deviates from the intermediate region. In addition, when T becomes extremely high, for example, in the summer, the air flow rate is in the MAX-HI state, which is larger than the HI.

In the next step 56, the air volume to be increased (increase air volume: ΔV1) in the defrost mode (DEF mode) is calculated for the air volume characteristic shown in FIG. In the initial stage of air conditioning, the initial value of ΔV1 = 0 is set from the increased air volume map shown in FIG. 6 (a) regardless of the outside temperature, but after the learning processing of the increased air volume map described later is performed, ΔV1 is calculated based on the learned map.

When the above calculation is completed, it is determined in step 58 whether the air conditioning mode is the automatic mode. If it is determined not to be in the auto mode (NO), it means that the blower drive voltage (VB) is in the manual mode state in which the blower volume is manually set. Is set to a voltage (VBmanual) (step 60), and the drive voltage (VB) is output to the motor 7a of the blower 7 (step 62).

If it is determined in step 58 that the mode is the auto mode (YES), the flow advances to step 64 to operate the blow mode operating portion 48 on the operation panel 46 to determine whether the blow mode is the DEF mode. Determine whether or not. When it is determined in step 64 that the blowout mode is not the DEF mode, the process proceeds to step 66, and the automatic air volume (VB _AUTO ) calculated in step 54 is directly set to the blower drive voltage (VB). , Go to step 62.

If it is determined in step 64 that the mode is the DEF mode, the process proceeds to step 68,
In step 68, it is determined whether the air volume setting has been changed by operating the air volume operation unit 47.
When the air volume operation unit 47 is operated to change the air volume setting, the process proceeds to step 70 to learn and change the increased air volume map, and in the next step 72, the increased air volume (ΔV1) is calculated from the learned increased air volume characteristic. The calculated value is added to the automatic air flow rate (VB _AUTO ) calculated in step 56 to obtain the blower drive voltage (VB). If the air volume setting has not been changed, the step 70 is bypassed to calculate the increased air volume (ΔV1) from the increased air volume characteristics up to now,
This ΔV1 is calculated by the automatic air volume (V
B _AUTO ) and blower drive voltage (VB).

FIG. 4 shows an example of a specific processing routine relating to the learning process of the increased air flow rate characteristic of the step 70. In step 80, the microcomputer 41 determines the air flow rate before the air flow rate is changed by the manual operation of the air flow rate operation unit 47. On the other hand, it calculates how much the air flow has changed. In step 82, the outside air temperature at the time when the air volume setting is changed by the operation of the air volume operation unit 47 is detected.

Then, in step 84, it is determined whether the air volume change amount calculated in step 80 is in the increasing direction or the decreasing direction. If it is a change in the increasing direction, the process proceeds to step 86, where the change amount of the previous increase air amount map with respect to the outside air temperature detected in step 82 is used as the learning amount α in the air amount change amount calculated in step 80.
It is calculated as a positive value multiplied by (0 <α ≦ 1). Also,
If the air volume changing direction is the decreasing direction, the process proceeds to step 88, and the amount of change of the previous increasing air volume map with respect to the outside air temperature detected in step 82 is added to the air volume changing amount calculated in step 80 as a learning coefficient. It is calculated as a negative value by multiplying by β (0 <β ≦ 1).

Then, in step 90, the change amount calculated in step 86 or 88 is added to the previous increased air flow amount map and changed to obtain an increased air flow amount map to be used in the subsequent processing.

Here, the learning coefficients α and β are different from the original occupant's taste depending on the occupant's health condition, mood, operation mistake, etc. when the air volume change amount by the occupant's operation is used as it is. This is for weighting the air volume change amount and gradually approaching the occupant's favorite increased air volume characteristics. In the control process, the desired characteristics are brought close to each other by gradually changing the characteristics. However, when the same setting change is performed several times under the same condition, the desired characteristics may be changed at once. .

According to the above-mentioned processing, however, if the blowing state in the DEF mode is changed, the increased air volume map is changed according to the changed amount, so that the characteristic of ΔV1 is as shown in FIG. Even if it is shown, for example, as shown in FIG. 6B, the characteristic is changed to obtain an optimal air flow feeling unique to the occupant. That is, the amount of increase in the air volume in the DEF mode is learned every time the air volume setting is manually changed, so that the occupants do not have to change the air volume in the same environment again. It is possible to obtain the DEF air volume that reflects the unique taste.

[0026]

As described above, according to the present invention,
The air volume that should be changed in the defrost mode, which varies from person to person, is changed every time the air flow rate in the defrost mode is changed, and the optimum DEF air volume is learned, so that the DEF air volume desired by the occupant can be automatically obtained. Therefore, the trouble of changing the air volume in the defrost mode is eliminated.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the present invention.

FIG. 2 is a diagram showing a schematic configuration of a vehicle air conditioner.

FIG. 3 is a flowchart showing an example of air flow rate control by a control unit.

FIG. 4 is a flowchart showing an example of a routine for changing the characteristic of the increased air volume (ΔV1) shown in step 70 of FIG.

FIG. 5 is a characteristic diagram showing the relationship between the total signal T and the air flow rate.

FIG. 6 is a diagram showing the characteristics of the increased air volume (ΔV1), FIG. 6 (a) is a map example showing the initial value of the increased air volume, and FIG. It is an example of a map showing the subsequent increase in air flow.

[Explanation of symbols]

 7 Blower 100 Control Signal Calculation Means 110 Defrost Mode Setting Means 120 Blower Volume Manual Setting Means 130 Automatic Air Volume Calculation Means 140 Increased Air Volume Calculation Means 150 Drive Control Means 160 Change Air Volume Calculation Means 170 Environmental Condition Recognition Means 180 Increased Air Volume Learning Means

Claims (1)

[Claims] 1. A control signal calculating means for calculating a control signal of an air conditioner according to environmental conditions, a defrost mode setting means for setting a blowout mode to a defrost mode, and a manual setting of a blowing amount blown into a vehicle compartment. Air flow rate manual setting means, automatic air volume calculation means for calculating the air volume for automatic control based on the control signal, increased air volume calculation means for calculating the increased air volume in the defrost mode, and the defrost mode setting means When the blowout mode is set to the defrost mode, the rotation of the blower is obtained so as to obtain the air flow rate obtained by adding the increased air flow rate calculated by the increased air flow rate calculation means to the automatic control air flow rate calculated by the automatic air flow rate calculation means. Drive control means for driving and controlling the air flow rate, and a changer for calculating the changed air flow rate when the set air volume is changed by the air flow rate manual setting means. Ventilation amount calculation means, environmental condition recognition means for recognizing the environmental conditions when the set air volume is changed by the blown air volume manual setting means, and for the environmental conditions learned by the environmental condition recognition means,
An increased air flow rate learning device for changing the increased air flow rate characteristic of the increased air flow rate calculation means based on the changed air flow rate calculated by the changed air flow rate calculation means.