JPH03213415A - Horizontal air distribution controller of vehicle air conditioner - Google Patents

Abstract

PURPOSE:To provide a device for horizontal air distribution control with well- balanced air conditioning and vertical temperature control by making horizontal air distribution control kept not in an automatic control condition when air by-pass quantity by cold air by-pass is less than a prescribed one. CONSTITUTION:Air blow-off quantity in the horizontal direction in a cabin is regulated by a distributed air quantity regulating means 100. Based on cabin temperature and quantity of solar radiation at least, it is determined whether the driving control of the regulating means 100 is conducted in an automatic condition, by a determination means 110. If it is determined to be automatic control, the driving of the control means 100 is controlled by a driving control means 120 according to the direction of solar radiation at least. Also, the air which has just passed through an evaporator is made to by-pass a main air conditioning duct to be led by a cold air by-pass means 130 and air by-pass quantity is set by the by-pass quantity setting means 140. If the air by-pass quantity is set at less than a prescribed one, the action of the above control means 120 is prohibited by an action prohibition means 150.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle air conditioner, and more particularly to a control device that controls a ventilation door according to solar radiation.

(Prior art) Conventionally, as this type of device, for example,
As shown in Japanese Patent No. 77823, a device is known in which the amount of air blown on the left and right sides is changed depending on the amount of solar radiation on the left and right sides of the vehicle interior.

In addition, in recent years, there has been a trend toward making it possible to adjust the functions of vehicle air conditioners to a certain extent according to the preferences of individual occupants.
"Left and right air distribution control". ), there have also been proposals that allow the air conditioning conditions to be changed vertically within the vehicle interior. As shown in Japanese Unexamined Patent Application Publication No. 1-190522, a so-called cold air bypass passage is installed to direct the air blown from the vent outlet to the occupants. A device that can be adjusted according to preference is known.

(Problem to be Solved by the Invention) However, in a device that is provided with both the left and right air distribution control and the cold air bypass passage as described above and is able to control each independently, the opening degree of the cold air bypass passage is reduced. When set, if there is solar radiation that is biased to the right or left inside the vehicle interior (hereinafter referred to as "unbalanced solar radiation"), the left and right air distribution control will direct air from the vent outlet in the direction where the polarized solar radiation is occurring. As a result of this concentration, the ambient temperature rises more than necessary in that direction, which actually causes a decrease in the air conditioning feeling. This is because, in general, as the opening degree of the cold air bypass passage is reduced, the temperature of the air blown out from the vent outlet becomes relatively higher. This occurs because the air is blown out in a concentrated manner in a certain direction, and together with the rise in ambient temperature due to solar radiation, the ambient temperature further rises.

Therefore, the present invention solves the problems of the conventional example caused by performing left and right air distribution control and cold air bypass control completely independently, and provides a well-balanced left and right air conditioning distribution without impairing the air conditioning feeling. It is an object of the present invention to provide a left and right air distribution control device for a vehicle air conditioner that is capable of controlling wind and controlling temperature up and down.

(Means for Solving the Problems) As shown in FIG. , an air distribution amount adjusting means 100 that adjusts the amount of air blown in the left and right directions in the vehicle interior from an air outlet opening in the upper direction of the vehicle interior, and the air distribution amount adjusting means based on at least the vehicle interior temperature and the amount of solar radiation. control state determining means 11 for determining whether or not to set the drive control of 100 to the automatic state;
0, and when the control state determining means 110 determines that the drive control of the air distribution amount adjusting means 100 is to be in the automatic state, a drive control means 120 that controls the driving of the air distribution amount adjusting means 100 based on at least the solar radiation direction. and cold air bypass means 130 that directs the air immediately after passing through the evaporator disposed in the main air conditioning duct to the front of the outlet by bypassing the main air conditioning duct by an amount corresponding to a control signal input from the outside. Bypass amount setting means 140 for setting the amount of bypass air by the cold air bypass means 130
When the bypass amount setting means 140 sets a bypass amount below a predetermined value, the drive control means 120
The device also includes an operation inhibiting means 150 for prohibiting the operation of the controller.

(Function) Therefore, when the bypass amount setting means sets a bypass amount below a predetermined value, the operation prohibition means prohibits the operation of the drive control means, so that the air distribution control according to the solar radiation is no longer performed. It is something that can accomplish the task.

(Example) 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 an air conditioning duct 1, and this intake door switching device 2 is configured to switch between an inside air population 3 and an outside air intake 4.
An inside/outside air switching door 5 is disposed at the part where the outside and outside air are separated, and by operating this inside/outside air switching door 5 with an actuator 6 to select the air to be introduced into the air conditioning ducts 1 to 1 into inside air or outside air, desired Inhalation mode is now available.

The blower 7 sucks air into the air conditioning duct 1 and blows it downstream, and an evaporator 8 is disposed behind the blower 7. The evaporator 8 is connected to the piping together with a compressor 9, a condenser 10, a receiver tank 11, and an expansion valve 12 to form a refrigeration cycle. The drive is controlled by engaging and engaging the clutch 14.

A heater core 15 is disposed behind the evaporator 8, and an air mix door 16 is provided upstream of the heater core 15. By adjusting the opening degree of the air mink store 16 with an actuator 17, the The ratio of air passing through heater core 15 to air bypassing heater core 15 is changed, thereby controlling the temperature of the blown air.

On the downstream side of the air conditioning duct 1, a defrost outlet 18, a vent outlet 19, and a foot outlet [ ] 20 open into the vehicle interior 32, and each outlet has a mode door 21a,
21b and 21c are provided, and these mode doors 2
By selectively opening and closing 1a, 21b, and 21c using an actuator 22, the blowing mode can be changed.

Further, on the downstream side of the mode door 21b, there are provided a right side air outlet 23 that opens at the right side position in the vehicle compartment 32, a left side air outlet 24 that also opens at the left side position, and a center air outlet 25. The air outlet 25 is further divided into a right central air outlet 25a and a left central air outlet 25b by a partition plate 26. A ventilation door 27 is provided in front of the partition plate 26, that is, on the upstream side of the air conditioning duct 1, and by opening and closing this ventilation door 27 with an actuator 28, the right air outlet 23 and the right center The amount of air blown out from the air outlet 25a and the amount of air blown out from the left side air outlet 24 and the left center air outlet 25b can be expressed in terms.

Further, this device is provided with a cold air bypass passage 29 that bypasses a part of the air conditioning duct 1.

Specifically, the cold air bypass passage 29 has one end connected to the air conditioning duct 1 downstream of the evaporator 8 and upstream of the air mink store 16, and the other end connected to the front of the vent outlet 19. , a part of the air that has passed through the evaporator 8 can be directly supplied to the vent outlet 19. The amount of cold air supplied through this cold air bypass passage 29 can be adjusted by controlling the opening degree of a cold air bypass door 30 provided in this passage 29 using an actuator 31.

Here, the compressor 9 mentioned above is of a variable capacity type, for example of a pull plate type. FIG. 3 shows an example of this wobble plate type, and the configuration will be outlined below with reference to the same figure.
A drive shaft 33 connected to the engine 13 via an electromagnetic clutch 14 is inserted into the compressor body 9a, and a wobble plate 34 is coupled to the drive shaft 33 via a hinge ball 35. This wobble plate 34 is supported in a crank chamber 36 formed in the compressor main body 9a so as to be swingable with respect to a drive shaft 33 with a hinge ball 35 as a fulcrum, and a piston connected to the wobble brake 1-34. 37 to tltJ] Cylinder bore 38 according to the angle
It is designed to move back and forth within the chamber. Further, the compressor 9 is provided with a pressure control valve 39 facing the crank chamber 36, and this pressure control valve 39 is connected to a valve body 4 that adjusts the communication state between the crank chamber 36 and a suction chamber 40 communicating to the suction side.
I, a pressure responsive member 42 that moves the valve body 41 according to the pressure within the suction chamber 40, and an electromagnetic coil 43 that moves the valve body 41.
Amount of electricity supplied to 1301. By controlling the amount of current ISQL to the electromagnetic coil 43 from the outside, blow-high gas leaking into the crank chamber 36 from between the piston 37 and the cylinder pore 38 is directed to the suction side. I try to adjust the amount of return.

Thus, a capacity variable device 45 is configured to change the capacity of the compressor 9 from the pressure control valve 39 and the like, and the electromagnetic coil 43
The amount of current I flowing through. 1 rises and the magnetic force of the solenoid 44 rises, the valve body 41 is connected to the crank chamber 36 and the suction chamber 4.
A force acts in the direction of restricting the communication with 0, and the amount of blow-by gas leaking from the crank chamber 36 to the suction chamber 40 is reduced.

As a result, the pressure inside the crank chamber 36 increases and the force acting on the back surface of the piston 37 increases, so the wobble plate 34 rotates about the hinge ball 35 in a direction that reduces the rocking angle, and the piston 37 stroke, that is, the capacity of the compressor becomes smaller.

Incidentally, the capacity variable device 45 is not limited to one that adjusts the amount of the suction-side heb0 low-high gas mentioned above using a pressure control valve, but also one that changes the number of cylinders used by the compressor, and a belt transmission that connects the compressor 9 and the engine 13. Any method that can substantially change the capacity may be used, such as a device that changes the pulley ratio of the device or a device that changes the number of effective vanes in a Hoehne type compressor.

The actuator 6.172228.3L blower 7 motor, electromagnetic clutch 14 and variable capacity device 4
5 are drive circuits 46a46b, 46c, and 46d, respectively.
, 46e, 46f, 46g and 46h, and these drive circuits 46a to 46h are connected to a microcomputer 47.

On the other hand, a potentiometer 48 detects the opening degree θ of the air mix door 16, a solar radiation sensor 49 detects the amount of solar radiation from the left and right directions of the vehicle, an outside temperature sensor 50 detects the temperature Ta of the outside air, and a temperature Tr inside the vehicle interior. The detection signals from the vehicle interior temperature sensor 51 to detect and the evaporator temperature sensor 52 to detect the temperature of the evaporator 8 and the control signal from the fuel injection control device 53 are selected by the multiplexer 54 and input to the A/D converter 55. , where it is converted into a digital signal and then input to the microcomputer 47.

Here, as shown in FIG. 4, for example, the solar radiation sensor 49 includes a right side photoelectric conversion element 49b using a photodiode or the like on the left and right slopes of a roof-shaped sensor stand 49a.
It has a basic configuration in which a left side photoelectric conversion element 49c and a left side photoelectric conversion element 49c are respectively arranged.

As shown in FIG. 5(b), the solar radiation sensor 49 is located approximately at the center of the top surface 56 of the instrument panel of the vehicle, with the ridgeline of the sensor base 49a pointing in the direction of vehicle travel (arrow F in the diagram). ) is attached so that it is parallel to the
In the same figure, a broken line shown as an extension of the ridgeline of the sensor stand 49a described above is set as a 0° reference line, and the right side of this reference line in the direction of movement is set as a positive azimuth angle, and the opposite side is set as a negative azimuth angle.

Furthermore, the fuel injection control device 53 controls the operating state of the engine 13 according to the running state of the vehicle. Therefore, the operating state of the engine 13 is controlled by adjusting the fuel injection timing of a fuel injection device (not shown). It is something to control. This device 53 determines whether or not the load on the engine 13 should be lightened by setting the discharge amount of the compressor 9 to the minimum capacity based on the operating state of the engine 13, and when it is determined that the load on the engine 13 should be lightened, the compressor The compressor 9 outputs a signal requesting that the discharge capacity of the compressor 9 be minimized, and also outputs a signal requesting that the compressor 9 be stopped in a predetermined case such as during acceleration.

Further, the microcomputer 47 is configured to receive signals from a ti control panel 57, a head temperature setting device 58, and an air distribution setting device 59.

The operation panel 57 includes an A switch 57a for automatically controlling all air conditioners such as blowers, an OFF switch 57b1 for stopping the drive of the air conditioner, and an A/C switch 57c1 for manually starting the cooling cycle. VENT mode, BL-L mode, HE A
Mode switches 576 to 57g to set T mode and DEF mode 2, rotation speed of blower 7 to low speed (FAN 1), medium speed (FAN 2),
Fan switch 57h to switch to high speed (FAN3)
57j, it is equipped with a temperature setting device 60 for adjusting the set temperature Td in the vehicle interior.

Here, the temperature setting device 60 includes an up/down switch 60
a60b and a display section 60c that displays the set temperature, and the set temperature shown on the display section 60c can be changed within a predetermined range by operating the amplifier down switches 60a and 60b.

Further, the head temperature setting device 58 includes, for example, a dial 58a, and by operating the dial 58a, the head temperature set temperature Ths can be changed within a predetermined range set in advance. It is something.

Furthermore, the air distribution setting device 59 is connected to the air distribution door 27 described earlier.
This is for manually setting the position of the adjustment lever 59a.
from the center position to the left (direction marked "L" in the diagram)
Or as it moves to the right (direction marked "R" in the figure), the left air outlet [] 24 and the left center air outlet 25b
, or acts to increase the amount of air emitted from the right air outlet 23 and the right center air outlet 25a.

The microcomputer 47 includes a central processing unit (CPU) (not shown), a read-only memory (ROM), a random access memory (RAM), and an input/output capo 1-(Ilo).
etc., and outputs necessary control signals to the drive circuits 46a to 46h in order to control the drive of the motor actuator 6, etc., described above, based on the various human power signals described above. .

Next, the main control routine of this apparatus by the microcomputer 47 described above will be explained below with reference to main flowchart 1 shown in FIG.

First, the microcomputer 47 starts execution at step 200, proceeds to step 202, performs input processing of detection signals from various sensors, etc., and proceeds to step 204.

In step 204, solar radiation amount calculation is performed based on the output signal of the solar radiation sensor 49 to calculate the solar radiation amount Ts. The details of this solar radiation amount calculation will be omitted, but in general terms, for example, the output signals TSR and TS of the two photoelectric conversion elements 49b49c
Based on L, if these output values are within a predetermined range, the average value of the two output signals is calculated, and if they are outside the predetermined range, the larger value is calculated as the solar radiation amount. Ts
It performs processing such as.

In the next step 300, the solar radiation direction is similarly calculated based on the output signal of the solar radiation sensor 49 (details will be described later), and the process proceeds to step 400.

In step 400, using the signal input in step 202 described above, a total signal T corresponding to the heat load in the vehicle interior is generated.
1 is calculated, for example, according to equation (1) below.

T+=ni+(Tr 25)+Kz(Tad -25)
10 to 3TSCK4 (Td 25) +〇+ 10Cz・
(1) However, K1- is a calculation coefficient of 4, and C2 is a calculation constant of 5. In addition, Tad is obtained by subjecting the outside air temperature Ta detected by the outside air temperature sensor 50 to a predetermined signal delay process (
A detailed explanation thereof will be omitted. ), referred to as "delayed outside temperature" for convenience. Tsc is obtained by subjecting the solar radiation amount Ts calculated in step 204 described above to predetermined signal delay processing (detailed explanation thereof will be omitted), and is referred to as "delayed solar radiation amount" for convenience.

Furthermore, C3 is determined by the following equation (2).

C,=to, (0-Tad)...
・(2) However, this applies only when Tad is 0°C or less; therefore, if Tad is greater than 0°C, C
1=0. Note that here, is a calculation coefficient.

After calculating T1 by the above calculation, step 500
Proceed to.

At step 500, the air mix door 16 is controlled according to the value of the above-mentioned overall signal T, and then the process proceeds to step 600, where the air volume of the blower 7 is similarly controlled according to the value of T1.

7b After the steering knob 600, the process proceeds to step 700, where left and right air distribution control, which is control of the rotational position of the air distribution door 27, is performed (details will be described later).

After the process of step 700, the process returns to step 202 described above via other control steps (not shown), and the processes up to this point are repeated.

Next, the solar radiation azimuth calculation described above will be explained below with reference to the subroutine flowchart shown in FIG.

First, the microcomputer 47 starts execution at step 302, proceeds to step 304, and determines whether or not the right photoelectric conversion element 49b has failed. Specifically, this determination is made based on, for example, whether the right photoelectric conversion element 49b is in a short-circuited state or in an open state. If it is determined that the right photoelectric conversion element 49b is out of order (YES), the process proceeds to step 314, where the solar radiation direction is assumed to be the center, and the process proceeds to step 316.

On the other hand, if it is determined in step 304 that the right photometric/electrical conversion element 8 49b is not in failure (No), the process proceeds to step 306, where a failure determination is performed for the left photometric/electrical conversion element 49c in the same manner as in step 304 described above. . If it is determined that there is a failure (YES), the process proceeds to step 314 described above, and otherwise (No), the process proceeds to step 308.

In step 308, the output signal TsH of the right side photoelectric conversion element 49b is changed to the output signal TsH of the left side photoelectric conversion element 49c, .
If it is determined to be larger (Y
ES), it is assumed that there is solar radiation from the right side with respect to the traveling direction of the vehicle, and the process proceeds to step 310. Otherwise (NO), it is assumed that there is solar radiation from the left side, and the process proceeds to step 312.

First, in step 310, the right direction output DR is calculated based on the calculation formula shown in FIG.

In such an arithmetic expression, Ks is an arithmetic coefficient. With respect to this calculation result DII, the solar radiation direction to the right is determined to have a certain relationship as shown in FIG. 7, and by obtaining this in advance, the solar radiation direction can be determined from the value of DR. Note that by changing the value of the calculation coefficient Ks, the relationship between the solar radiation direction and the DR value can be adjusted, as shown by the dotted line in the figure.

Further, in step 312, the left direction output DL is calculated based on the calculation formula shown in FIG. This operation is basically the same as the above-mentioned operation of l, and D
9. The relationship between the solar radiation direction and the solar radiation direction is expressed by the characteristic line shown on the left side of the central vertical axis in FIG. 7, and is exactly the same as in the case of DR.

Next, in step 316, the solar radiation amount T before performing the delay processing calculated in step 204 of the main routine is
It is determined whether s is smaller than a predetermined value α, and if it is smaller (Y
ES), that is, if the solar radiation is relatively calm, step 3
18, it is assumed that the solar radiation direction is at the center regardless of the solar radiation direction determined in step 310 or 312, and the process returns to the main routine via step 320.

On the other hand, if the determination in step 316 is No,
That is, if the solar radiation is relatively strong, the program skips the step 318 and directly proceeds to step 320, and returns to the main routine via step 312.

Therefore, if step 318 is skipped, the process returns to the main routine with the solar radiation direction determined in either step 310 or 312314 described above.

Next, the contents will be explained below with reference to the left/right air distribution control subroutine shown in FIG.

First, the microcomputer 47 starts execution from step 702, proceeds to step 704, and sets the air distribution setting device 5.
It is determined whether or not the adjustment lever 59a of No. 9 is set to the left end (the position where the letter "L" on the setting device 59 is displayed), and if it is determined that it is set to the left end (YES ), proceed to step 728 and fix it to the left side fully open. That is, in order to fully open the left air outlet 24 and the left center air outlet 25b, and completely close the right air outlet 23 and the right center air outlet 25a, the air distribution door 27 is opened as shown in FIG.
The drive circuit 46d and actuator 2 are operated to rotate to the position.

1 U On the other hand, if it is determined in step 704 that it is not set to the left end (NO), proceed to step 706 and move the adjustment lever 59a to the right end (rR of the air distribution setting device 59).
If it is determined that it is set at the right end (YES)
The process then proceeds to step 730, in which the air distribution door 27 is rotated to the ■ position shown in FIG. 2, contrary to the case of step 728 described above, and the right air outlet 23 and the right center air outlet 25a are fully opened.

On the other hand, if it is determined in step 706 that the right end is not set (NO), the process proceeds to step 708, where it is determined whether or not the blowout mode is in the vent mode.

Then, if it is determined that it is in vent mode (YES
), the process skips the next step 710 and directly proceeds to step 712, and if it is determined that the vent mode is not (NO), the process proceeds to step 710.

In step 710, the blowing mode is set to pie level (
B/L) Determine whether the mode is in any of modes 1 to 3.2 If it is determined that the mode is in one of the high level modes (YES), proceed to step 712; If it is determined that (No)
In each case, the process advances to step 732.

Here, this embodiment is based on the assumption that the high level mode is divided into three stages, and the ratio of the opening degrees of the vent outlet 19 and the foot outlet 20 can be changed in three stages. For example, in high level mode 1, the vent outlet 19 is set to 80% opening, and the foot outlet 20 is set to 20%, and in pie level mode 2, the vent outlet 19 and the foot outlet 20 are set to 20%. Both are set to 50% opening, and in pie level mode 3, the vent outlet 19 is set to 20%.
% opening, and the foot air outlet 20 is set to 80% opening.

In one step 732 selected by the determination in step 710 described above, the ventilation door 27 is returned to the central position as shown in FIG.

Further, in step 712, left and right wind distribution third-upper area calculations are performed. This is a calculation for determining whether the control of the ventilation door 27 is automatic or manual. Specifically, as shown in FIG. A characteristic pattern that determines automatic control or manual control is determined in advance according to the correlation with
Based on this characteristic pattern, the control state is determined from the vehicle interior temperature Tr and the delayed solar radiation 1iTsc at that time.

According to the characteristic pattern shown in FIG. 9, manual control is performed when Tr is below a predetermined value α and Tsc is below a predetermined value β, and when Tr is below a predetermined value α and Tsc is below a predetermined value 1. In each of the above cases, automatic control will be selected. In a region where Tr exceeds a predetermined value α, the TscO value for switching between automatic control and manual control changes with a predetermined slope as shown in the figure, and control is switched accordingly. There is.

Note that the area between the Tsc values β and γ is a so-called hysteresis zone, which is provided to ensure switching stability. In addition, when Tsc is in the 4 hysteresis zone and when the device is started,
Manual control is now the preferred choice.

After the processing in step 712, the process proceeds to step 714, where it is determined whether the set temperature Td by the temperature setting device 60 is set to the minimum value, that is, the maximum cooling state (MAX C00L). If it is determined that the air conditioner is in the maximum cooling state (YES), the process proceeds to step 726, and otherwise (NO), the process proceeds to step 716.

To add a little bit more about the function of the head temperature setting device 58, in this device, the high level mode is divided into three stages, so that the so-called "pan temperature control" can be adjusted to a certain extent according to the passenger's preference. However, a cold air bypass duct 29 is provided to meet the demands of passengers that cannot be met with this three-stage switching, and the head temperature setting device 58
is for adjusting the opening degree of the cold air bypass door 30 disposed within the cold air bypass duct 29.

Therefore, the head temperature setting device 58 is normally set to the WARM side or the COLD side in the bay level mode, and when the dial 58a is set to the WARM side, the cold air bypass door 30 is set in the closing direction. The temperature of the air blown from the vent outlet 19 is adjusted by turning the dial 58a to C0LD.
It will rise compared to when it is set to the side.

Returning to the explanation of the subroutine flowchart of FIG. 8, first, in step 726, the ventilation door 2
7 is placed under manual control. That is, as shown in FIG. 10, the position of the ventilation door 27 is uniquely determined by the position of the adjustment lever 59a. For example, when the adjustment lever 59a is in the center position, the ventilation door 27 is also set in the center position as shown in FIG. The opening degree of the central air outlet 25b is both 50% (
The amount of air blown out from the right side outlet 23 and the right center outlet 25a, and the left side outlet 24 and the left center outlet 25b
The amount of air blown out from the vehicle is half of the total amount of air blown into the vehicle interior). As the adjustment lever 59a is moved from the center position to the right or left, the opening degrees of the right side air outlet 23 and the right side center air outlet 25a, or the left side air outlet 24 and the left side center air outlet 2'5b change to the other side. When the adjustment lever 59a is at the right end, the right air outlet 23 and the right center air outlet 25a are fully opened, and when it is at the left end, the left air outlet 24 is fully opened. And the left central air outlet 25b is fully opened.

On the other hand, in step 716, it is determined whether automatic control has been selected as the left and right air distribution control by the process of step 712 described above, and if it is determined that it is in the automatic control region (YES), the process advances to step 718, The setting of the head temperature setting device 58 (corresponding to the head set temperature Ths) is on the heating side (W
ARM side). And W.A.M.A.R.M.
If it is determined that the air distribution door 27 is on the side (YES), the process proceeds to step 724, where a delay process is performed when driving the ventilation door 27, and the process proceeds to the manual control state of step 726 described above. This delay processing in step 724 is the delay processing in step 724.
The left and right air distribution control is in the automatic control state until a YES determination is made in step 8, and when transitioning to the manual state in step 726, the air distribution state in the automatic control state and the air distribution state in the manual control state are In most cases, there is a gap between the air conditioners, so in order to alleviate the discomfort of the air conditioning feeling during the transition, the ventilation door 27 is gradually rotated at a predetermined speed to a position determined by manual control. It is something.

Further, when the head setting is on the WARM side, the reason why the left and right air distribution control is changed from automatic control to manual control as described above is as follows.

In other words, if the head setting is on the WARM side and the left/right air distribution control is set to automatic, for example, if sunlight is biased towards either the left or right side of the vehicle interior, the system will automatically control the air flow in that direction. The position of the ventilation door 27 is controlled, but because the head setting is on the WARM side, relatively warm air is blown out, which, together with the increase in ambient temperature due to solar radiation, actually increases the air conditioning temperature. This is to avoid a situation where the ring deteriorates.

On the other hand, if the determination in step 718 is NO, the process proceeds to step 720, where it is determined whether the rotational speed B AUTO of the blower 7 in the automatic air conditioning control mode is equal to or higher than the medium speed (MBD), If the speed is higher than the medium speed (NO), proceed to step 722 to perform the automatic left and right air distribution control described later.
Proceed to step 6 to manually control left and right air distribution.

In this way, the reason why the rotational speed of the blower 7 is used as the criterion when the left and right air distribution control shifts from manual control to automatic control is because the air distribution door 27 is automatically controlled when the rotational speed of the blower 7 is relatively high. This is because the so-called wind noise generated by the rotation causes discomfort to the occupants, and the transition from manual to automatic mode is attempted in a rotational state of the blower 7 that does not cause such discomfort. .

Next, the left and right 9 performed in step 722 Automatic air distribution control will be explained.

This control automatically rotates the ventilation door 27 according to the direction of solar radiation entering the vehicle interior, and the relationship between the solar radiation direction and the amount of left and right air distribution is determined in advance as shown in FIG. 11, for example. It is designed to follow a characteristic pattern. To explain this diagram, first, the horizontal axis shows the solar radiation direction, and the right side shows the solar radiation towards the right side of the vehicle interior, and the left side shows the solar radiation towards the left side of the vehicle interior, centered on the center zero point. . The central vertical axis indicates the setting position of the adjustment lever 59a of the air distribution setting device 59, and the area above the zero point at the center of the vertical axis is g! The setting position when the one-bar lever 59a is set to the right from the center position of the setting device 59, and the setting position below the zero point is the adjustment lever 59.
The respective setting positions are shown when a is set to the left, contrary to the above. In addition, the vertical axis at the left end of the figure shows the left and right air distribution volume, and the left and right air volume in the center of 50% is the air distribution door 2.
7 is set at the center position shown by the solid line in FIG. If this increases the left and right air distribution amount, for example 80% means that the air distribution door 27 is moved 30% in the direction ■ in Figure 20, and in this case, the air is blown into the passenger compartment. 80% of total air volume
is blown out from the right side air outlet 23 and the right side center air outlet 25a, and the remaining 20% is blown out from the left side air outlet 24 and the left side center air outlet 25b, respectively.

Therefore, in the automatic left and right air distribution control based on this characteristic pattern, the left and right air distribution amount is determined according to the solar radiation direction, but the determined air distribution amount is determined by the adjustment lever 59a of the air distribution setting device 59.
This takes into consideration the location of For example, when the adjustment lever 59a is in the center position, the solar radiation direction is 30° to the right.
The left and right air distribution is fixed at 50% from , the amount of left and right air distribution is 80% at the solar radiation direction of 70°. On the other hand, the solar radiation direction is from 30° to 70° to the left.
Until then, the amount of air distributed on the left increases as the solar radiation azimuth increases in the left direction, and at the solar radiation azimuth of 70°, the left and right air distribution amount is 30%, that is, the air is discharged from the right air outlet 23 and the right center air outlet 25a. The air volume is 30% of the total air volume blown out, and the remaining 70% is blown out from the left air outlet 24 and the left central air outlet 25b.

When the adjustment lever 59a is moved, for example, two notches to the right, the left and right air distribution amount is fixed at 70% when the solar radiation direction is from 30 degrees to the right to 30 degrees to the left, and when the solar radiation direction is from 30 degrees to the right. Between 70° and 70°, left and right air distribution amount is 9.
The amount of left and right air distribution increases as the solar radiation azimuth increases toward 0%, and the amount of left and right air distribution reaches 90% at the 70° position.

Furthermore, when the solar radiation direction is from 30° to 70° to the left, the left and right airflow volume decreases as the solar radiation azimuth increases toward 50%, and at the 70° position, the left and right airflow volume reaches 50%. Hereinafter, depending on the position of the adjustment lever 59a, the 11th
As shown in the figure, the left and right air distribution amounts are determined based on the solar radiation direction. In addition, the solar radiation direction is 70° on both the left and right sides.
In the region exceeding , the left and right air distribution amounts are fixed to the values at 70°.

Step 722 described above. 726, 728, 730° 2 After performing any of the processes at 732, the process returns to the main routine via step 734.

Therefore, to summarize the operation of this device using left and right air distribution control, first, when the adjustment lever 59a of the air distribution setting device 59 is in a position other than the left and right ends, and the dial 58a of the head temperature setting device 58 is in the center position. Assume that the start switch (not shown) of the device is turned on while the device is set to .

Assuming that the vent mode is selected as the blowout mode in response to the general signal T, the left and right air distribution control is in a manual control state since it is the time of starting, and the air distribution door 27 is set to a position corresponding to the position of the adjustment lever 59a. (See steps 704 to 716 and 726).

In this case, if the solar radiation is greater than the predetermined value γ, automatic control is selected for the left and right air distribution control in the second subroutine process after the apparatus is started. Further, if the dial 58a of the head temperature setting device 58 is not on the WARM side and the rotation speed of the blower 7 is lower than the medium speed, the ventilation door 27 is automatically moved to its position according to the characteristic line 3 shown in FIG. will be controlled (see steps 716-722).

Even if the dial 58a of the head temperature setting device 58 is not on the WARM side, if the blower 7 is rotating at a medium speed or higher, the left and right air distribution control will still be maintained in the manual state ( (See steps 716-720, 726).

Furthermore, even if the conditions for automatic control of the left and right air distribution control are established as described above, the dial 58a of the head temperature setting device 58
If it is set to the WARM side, the left and right air distribution control will still be maintained in the manual control state (see Stenbu 716, 718 and 726).

(Effects of the Invention) As described above, according to the present invention, when the amount of air bypassed by the cold air bypass passage becomes less than a predetermined value,
Since the left and right air distribution control is not automatically controlled,
When the degree of opening of the cold air bypass door is small, that is, when relatively warm air is blown out from the vent outlet, automatic control of left and right air distribution based on solar radiation can be performed to compare to the side with solar radiation. This avoids the problem of conventional devices where warm air is blown out and the feeling of air conditioning is affected.

In addition, as mentioned above, automatic left and right air distribution control is not performed only under specific conditions, and in other cases, so-called upper and lower temperature control are controlled independently, so the balance can be maintained without significantly impairing conventional functions. This has the effect that it is possible to provide a left and right air distribution control device for a vehicle air conditioner, which allows for smooth air conditioning control.

[Brief explanation of drawings]

Fig. 1 is a functional block diagram of left and right air distribution control of a vehicle air conditioner according to the present invention, Fig. 2 is a configuration diagram showing an embodiment of this device, and Fig. 3 is a variable capacity compressor used in this device. FIG. 4(a) is a cross-sectional view showing one embodiment of the present invention, and FIG.
b) is a plan view showing the installation state of the solar radiation sensor same as above;
The figure is a main flowchart showing the main side control routine of this device by the microcomputer used in this device, FIG. 6 is a subroutine flowchart showing the solar radiation direction calculation routine by the microcomputer of this device, and FIG. 7 is the solar radiation direction output. Figure 8 is a subroutine flowchart showing the left and right air distribution control routine by the microcomputer of this device, and Figure 9 shows whether the left and right air distribution control is automatic or manual. A characteristic diagram for determining the control state based on the correlation between the vehicle interior temperature and the amount of solar radiation used for determination, and FIG. 10 is a characteristic diagram showing the relationship between the adjustment lever position of the ventilation setting device and the opening degree of the ventilation door. , FIG. 11 is a characteristic diagram showing the relationship between the solar radiation direction and the left and right air distribution amounts using the adjustment lever position of the air distribution setting device as a parameter. 19...Vent outlet, 23...Right side outlet, 24
...Left air outlet, 25...Center air outlet, 25a...
・Right center outlet, 25b...Left center outlet, 27
...Air distribution door, 29...Cold air bypass duct, 30
...Cold air bypass door, 100...Air distribution amount adjustment means, 110...Control state determining means, 120...Nine day drive control means, 130...Cold air bypass means, 140...Bypass amount setting Means, 150... Means for inhibiting operation. Patent applicant Diesel Equipment Co., Ltd.

Claims (1)

[Scope of Claims] An air distribution amount adjusting means for adjusting the amount of air blown in the left and right directions inside the vehicle interior from an air outlet that is formed at the leeward end of the main air conditioning duct and opens in the upper direction of the vehicle interior. , control state determining means for determining whether to set the drive control of the air distribution amount adjusting means to an automatic state based on at least the vehicle interior temperature and the amount of solar radiation; and driving the air distribution amount adjusting means by the control state determining means. When it is determined that the control is to be in an automatic state, at least a drive control means for controlling the drive of the air distribution amount adjusting means based on the solar radiation direction, and a drive control means for controlling the drive of the air distribution amount adjusting means based on at least the solar radiation direction; cold air bypass means for bypassing the main air conditioning duct and guiding it to the front of the outlet by an amount according to a control signal; a bypass amount setting means for setting the amount of bypass air by the cold air bypass means; and the bypass amount setting means. A left-right air distribution control device for a vehicle air conditioner, comprising an operation prohibiting means for prohibiting operation of the drive control means when a bypass amount less than a predetermined value is set in the means.