JP2826892B2 - Air distribution control device for automotive air conditioner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air distribution control device of an air conditioner for an automobile, which adjusts a ratio of an amount of air supplied to the left and right sides of a vehicle compartment according to a direction of sunlight.

(Prior Art) As this type of air conditioner for a vehicle, for example, Japanese Patent Publication No. 62-1987
The prior art disclosed in Japanese Patent No. 5085 has a solar radiation sensor disposed in a vehicle interior, and a wind distribution door driven in accordance with an output signal of the solar radiation sensor. Is changed to prevent temperature deviation in the vehicle interior due to solar radiation.

(Problems to be Solved by the Invention) However, in a one-box car or the like, when a curtain is installed on a side glass, if the solar radiation sensor is attached to an instrument panel or the like facing the windshield, the curtain is closed. Even though the sunlight has not entered the passenger compartment, the amount of air distribution on the side where the insolation is unbalanced has increased, and there has been an inconvenience in that excessive wind is supplied to the occupants to cause discomfort.

Therefore, in the present invention, the above disadvantages are solved,
An object of the present invention is to provide an air distribution control device for an air conditioner for a vehicle, which can appropriately compensate for a disturbance in a temperature control balance in a room that changes according to opening and closing of a curtain.

(Means for Solving the Problems) The gist of the present invention is, as shown in FIG. 1, an air distribution ratio variable means 100 for varying the air distribution ratio on the left and right sides of a vehicle, and a solar radiation amount. A solar radiation sensor 200 for detecting, an incident direction calculating means 300 for calculating an incident direction of sunlight with respect to a vehicle traveling direction based on an output of the solar radiation sensor 200, and a curtain for detecting opening and closing of a curtain provided on left and right side glasses of the vehicle Open / close detection means 400, curtain open / close determination means 500 for determining whether the left and right curtains of the vehicle are open or closed based on the output of curtain open / close detection means 400, and curtain open / close determination means 500 If it is determined that the left and right curtains are open,
Set a predetermined air distribution pattern to increase the air distribution amount on the side where the solar radiation is biased, and if it is determined that the right curtain is in the closed state, the air distribution pattern that regulates the increase in the air distribution amount on the right side of the vehicle compartment, When it is determined that the left curtain is in the closed state, the air distribution pattern setting means 600 and the air distribution pattern setting means 600 each set an air distribution pattern for restricting an increase in the air distribution amount on the left side of the vehicle cabin. Left and right air distribution ratio calculating means 700 for calculating a left and right air distribution ratio from the incident azimuth based on the air distribution pattern, and the air distribution ratio calculated by the left and right air distribution ratio calculating means 700. And a drive control means 800 for controlling the driving of the variable means 100.

(Operation) Therefore, when the curtain of the side glass is in the open state by the air distribution pattern setting means, an air distribution pattern is set such that the amount of air on the side into which the solar radiation is inserted is increased in the case of uneven solar radiation, but the curtain is in the closed state. If this is the case, the air distribution pattern that suppresses the air volume that should originally increase during sunshine is set, so even though the curtain is closed, the airflow increase due to sunshine exceeds the comfortable state and is excessively performed It is possible to prevent the above problem, and therefore, the above-mentioned problem can be achieved.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 2, for example, a one-box car is shown as a vehicle on which the air conditioning unit 1 for the rear seat is mounted, and the air conditioning unit 1 for the rear seat is housed in a housing space 2 provided under the floor behind the driver's seat, for example. ing.

A specific configuration example of the rear seat air conditioning unit 1 is shown in FIG. 3. The rear seat air conditioning unit 1 is provided with an inside air inlet 4 at the most upstream side of the air conditioning duct 3. The vehicle interior air sucked through the inlet 4 is sent to the downstream side.

An evaporator 6 is provided on the downstream side of the blower 5, and the evaporator 6 constitutes a cooling cycle together with a compressor (not shown) and the like, and cools air passing through the evaporator 6.

Further, a heater core 7 is disposed downstream of the evaporator 6, and an air mix door 8 is provided in front of the heater core 7. By adjusting the opening degree of the air mix door 8 by the actuator 9, the ratio of the air passing through the heater core 7 and the air bypassing the heater core 7 is changed. As a result, the air mixed behind the heater core 7 Is controlled.

Then, the mixed air is split into a vent outlet 10 and a heat outlet 11 and is blown out to a rear seat space 12 of a vehicle compartment,
The blowing mode is switched by mode doors 14a and 14b driven by the motor actuator 13.

The vent outlet 10 is divided into a right vent outlet 10a which opens on the right side of the rear seat space 12 and a left vent outlet 10b which opens on the left side. The air distribution door 16 provided in front of the partition 15 is driven and controlled by a motor actuator 17 so that the ratio of the amount of air supplied to the right occupant 18 and the left occupant 19 sitting in the rear seat (air distribution ratio ) Is adjusted.

20 is a solar radiation sensor that detects the amount of solar radiation, 21 is a curtain opening / closing detection sensor that detects the opening / closing of a curtain 24a provided inside the right side glass 23a of the vehicle, 22 is an opening / closing curtain 24b provided inside the left side glass 23b. Is a curtain open / closed detection sensor for detecting the curtain open / closed state.

The solar radiation sensor 20 used here is provided, for example, in the upper central part of the instrument panel 25 of the automobile shown in FIG. 2, and as shown in FIG. 4, the entire sensor is used to efficiently catch light from the sun. It is installed on a wedge-shaped base 27 so as to face the windshield 26. Furthermore, this solar radiation sensor 20 has two left and right light receiving elements 20a, 20b,
As shown in FIG. 6, these two light receiving elements 20a and 20b are juxtaposed with their boundaries in the vehicle traveling direction (the direction of the arrow), and the portions that are in contact with each other are higher than the left and right ends. Has become.

In this embodiment, the curtains 24a and 24b are
As shown in FIG. 3 and FIG.
Attached to curtain rails 30a, 30b provided above and below the side glass on the inner wall along a, 23b, one end thereof is fixed to the rear end of the curtain rails 30a, 30b. Thus, if the other ends of the curtains 24a and 24b are slid to the front ends of the curtain rails 30a and 30b, the side glasses 23a and 23b are closed by the curtains 24a and 24b,
When the other ends of the curtains 24a, 24b are moved toward the rear end of the curtain rails 30a, 30b, the curtains 24a, 24b are opened.

Further, the curtain opening / closing detection sensors 21 and 22 are provided, for example, near the front end of the lower curtain rail 30b, and include switches that are turned on when the curtains 24a and 24b touch.

Output signals from the solar radiation sensor 20 and the curtain opening / closing detection sensors 21 and 22 are input to an A / D converter 32 via a multiplexer (MPX) 31 for performing signal selection, where they are converted into digital signals. The data is input to the microcomputer 33.

The microcomputer 33 has a central processing unit (CPU), a read-only memory (ROM), a random access memory (RAM), an input / output port (I / O), and the like (not shown). , A control signal is output to the actuators 9, 13, 17 and the motor of the blower 5 via drive circuits 35a to 35d, respectively.
Drive control of a, 14b, 16 and rotation control of the blower 5 are performed. Here, a motor actuator 17 that drives the air distribution door 16
And a drive circuit 35 for driving the motor actuator 17
The air distribution door drive control means is constituted by c.

Next, referring to FIG.
Among the controls, an example of the control operation of the air distribution door 16 is shown as a flowchart, and the following description will be made based on this flowchart.

In FIG. 6, the microcomputer 33 starts the execution of this program from a start step 50. In a step 52, the microcomputer 33 performs a process of inputting signals from the solar radiation sensor 20 and the curtain opening / closing detection sensors 21 and 22, and calculates the incident azimuth calculating means. In the next step 54, the deviation α of the incident light with respect to the traveling direction of the vehicle (hereinafter referred to as the incident azimuth) is calculated.

The specific calculation method of the incident direction α is shown in FIG.
In step 80, compares the values of the output I _R output I _L and right of the light receiving element 20b of the left light-receiving elements 20a, the incident azimuth detection signal SD proceeds to step 82, if I _R ≧ I _L (1 If I _R <I _L in the formula, the process proceeds to step 84, where SD is obtained by the formula (2).

Then, using this SD, in steps 86 and 88, I
If _R ≧ I _L the bias of solar radiation to the driver side with respect to the vehicle traveling direction with a (3), the deviation of solar radiation to the assist side with respect to the vehicle traveling direction, if I _R <I _L (4) with formula Each of them is calculated to determine the incident direction α.

α = K · SD formula (3) α = −K · SD formula (4) where K is such that α calculated using formulas (3) and (4) matches the actual incident direction. This is a calculation constant obtained in advance by an experiment or the like. In addition, the incident azimuth α indicates that the deviation of the solar radiation toward the driver side is a positive value, and the deviation of the solar radiation toward the assist side is a negative value.

After the incident azimuth α is calculated in the previous step 54, the process proceeds to step 56, where it is determined whether or not there is a condition for performing the balance control of the left and right air distribution in the rear seat space. Although this determination criterion is not described in detail, preferably, in a transient state in which the temperature control state in the vehicle compartment approaches the target temperature control state, the left and right air distribution control is not performed, and the vehicle reaches the target temperature control state. It is preferable to select a criterion for starting the left and right air distribution control when the indoor temperature control is stabilized.

If it is determined in this step 56 that the conditions for performing the left and right air distribution control are not satisfied, the process proceeds to step 58, where the air distribution door 16 is driven to be fixed at the center (a position where the left and right air distribution ratios become equal). A control signal is output to the motor actuator 17 via the circuit 35c.

If it is determined in step 56 that the right and left air distribution control is performed, the right curtain 24a is closed (CLOSE) in step 60 based on the signal from the right curtain opening / closing detection sensor 21. It is determined whether or not the left curtain 24b is in the closed state (CLOSE) based on the output signal from the left curtain opening / closing detection sensor 22 in steps 62 and 64, respectively.

These judgment steps 62 and 64 constitute a curtain opening / closing judgment means. When both the left and right curtains are in the open state, the process proceeds to step 66, and the control pattern based on the solar radiation direction of the air distribution door 16 is changed as shown in FIG. A predetermined characteristic pattern shown by a solid line is set. Here, this characteristic pattern indicates the opening degree of the air distribution door (when the air distribution door 16 is located at the position in FIG. 3 where air can be obtained only from the left vent outlet 10b, the opening degree is 0).
%, The third that air can be obtained only from the right vent outlet 10a
The opening when the air distribution door 16 is located at the position shown in FIG. ) Is 50% in the range of -30 ° to 30 ° of the solar azimuth α, and the opening decreases as α becomes smaller than -30 °, and becomes −80.
と な り In the vicinity, it becomes 10%, so that the opening degree does not become smaller. Also, as α becomes larger than 30 °, the opening becomes larger, and becomes 90% near 80 °, so that the opening does not become larger.

If it is determined in the determination steps 60 and 62 that the right curtain 24a is in the closed state, the process proceeds to step 68, in which the control pattern based on the solar radiation direction of the air distribution door 16 is indicated by a dashed line in FIG. The pattern is set such that the increase in the amount of right-side blown air is restricted as shown in FIG. That is, the opening degree of the air distribution door 16 is 50% in the range of -30 ° to 90 ° of the incident azimuth α, and the opening degree of the air distribution door 16 is proportional to α when α is in the range of -30 ° to -80 °. 50
From 10% to 10%.
Should not be less than 10%.

On the other hand, when it is determined in the determination steps 60 and 64 that the left curtain 24b is in the closed state, the process proceeds to step 70, and the control pattern based on the solar radiation azimuth of the air distribution door 16 is changed as shown in FIG. It is set to a pattern that restricts the increase in the amount of left-hand blown air as indicated by the dashed line. That is, the opening degree of the air distribution door 16 is 50% in the range of -90 ° to 30 ° of the incident azimuth α, and the opening degree of the air distribution door 16 is 50 in proportion to α when α is in the vicinity of 30 ° to 80 °.
From 90% to 90%.
Do not exceed 90%.

Further, if it is determined in the determination steps 60 and 62 that both the right curtain and the left curtain are in the closed state, the process proceeds to step 72, and a pattern is set to restrict the increase in the left and right blowout air volumes. In this embodiment, the opening of the air distribution door 16 is set to 50% (not shown in FIG. 8) from -90 ° to 90 °.

In steps 66 to 72 described above, an air distribution pattern setting unit that sets the air distribution ratio in the rear seat space is configured.

After the air distribution pattern is set in any of steps 66 to 72, the process proceeds to step 74 corresponding to the left and right air distribution ratio calculation means, and the air distribution set based on the solar radiation azimuth calculated in step 54 above. The left and right air distribution ratio of the rear seat space is calculated from the wind pattern, and a control signal is output to the motor actuator 17 via the drive circuit 35c to drive the air distribution door 16 to a position where the calculated air distribution ratio is obtained. .

Because of this, the side glass curtain is open,
In the case where the incident direction is deviated and the sunlight is incident from the side glass, the amount of air distribution to the side where the sunlight shines is increased as in the past, and the disturbance of the temperature control balance due to the sunlight is corrected. When it is in the closed state, the increase in air distribution on the closed side of the curtain is suppressed,
Even if the sunlight is not blocked by the curtains and does not significantly affect the temperature control balance of the rear seat space, it prevents the air distribution ratio from being changed excessively, and the distribution is adjusted to the environmental condition of the rear seat space. Wind control can be performed.

In this embodiment, the regulation of the air distribution amount is such that the opening of the air distribution door is 50%. However, in the regulation of the increase in the right air volume, the opening degree of the air distribution door is 90% and 50%. %, Or in the regulation of the increase of the left air volume, the opening of the air distribution door may be set between 10% and 50%.

(Effects of the Invention) As described above, according to the present invention, when the curtain provided on the side glass is open, the amount of air distribution on the side where the sunlight is scattered and the sun is inserted increases, and the temperature control by the solar radiation increases. Imbalance in balance is compensated, and when the curtain is closed, the amount of air distribution is increased even if the sun is biased to the side where the curtain is closed. It is possible to appropriately compensate for the disturbance of the temperature control balance.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing the present invention, FIG. 2 is an explanatory view showing a one-box car, FIG. 3 is a schematic configuration diagram showing an automotive air conditioner according to the present invention, and FIGS. 6 is a side view and a perspective view showing an installation state of a sensor, and FIG.
Fig. 7 is a flowchart showing an example of a control operation of the air distribution door by the microcomputer of the automotive air conditioner. Fig. 7 is a flowchart showing a subroutine example of the incident azimuth calculation. Fig. 8 is a diagram showing characteristics of the air distribution door opening degree. It is. 23a, 23b …… Side glass, 24a, 24b …… Curtain, 100
……………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………… Waitable curtain detection means
Curtain opening / closing determination means, 600: air distribution pattern setting means, 700: left / right air distribution ratio calculation means, 800: drive control means.

Claims (1)

(57) [Claims] 1. An air distribution ratio varying means for varying an air distribution ratio on the left and right sides of a vehicle, a solar radiation sensor for detecting an amount of solar radiation, and an incident direction of sunlight with respect to a vehicle traveling direction is calculated based on an output of the solar radiation sensor. Incident azimuth calculating means, curtain opening / closing detecting means for detecting the opening / closing of a curtain provided on the left and right side glass of the vehicle, and the left and right curtains of the vehicle are open or closed based on the output of the curtain opening / closing detecting means. Curtain opening / closing determining means for determining whether the curtain opening / closing determining means determines that the left and right curtains are in an open state, and a predetermined air distribution pattern for increasing the amount of air distribution on the side where sunlight is biased. If the right curtain is determined to be closed, the air distribution pattern that regulates an increase in the air distribution on the right side of the cabin is determined to be the closed curtain. In the case of, the air distribution pattern setting means for respectively setting the air distribution pattern that regulates the increase in the air distribution amount on the left side of the vehicle compartment, and the left and right sides of the vehicle compartment from the incident direction based on the air distribution pattern set by the air distribution pattern setting means Left and right air distribution ratio calculation means for calculating an air distribution ratio; and drive control means for driving and controlling the air distribution ratio variable means to achieve the air distribution ratio calculated by the left and right air distribution ratio calculation means. An air distribution control device for an automotive air conditioner, characterized by: