JPH0365422A - Air-conditioning controller for automobile - Google Patents

Abstract

PURPOSE:To constantly improve air-conditioning feeling in the side of a driver's seat in automatic control by calculating wind distribution to right and left according to a control characteristic, where control range of wind distribution according to the direction of solar radiation is defined larger in the side of the driver's seat than in the side of front passenger's seat, so as to control right and left wind distribution doors in accordance with the calculated results. CONSTITUTION:Right and left quantity of solar radiation SR, SL is detected by right and left solar radiation sensors, based on which, direction of solar radiation and the quantity thereof are calculated by calculating means 200 and 300. Based on the quantity of solar radiation and on interior head temperature, whether right and left wind distribution control is performed automatically or manually is determined by a calculating means 400. At the time of manual control, according to a set position by a setting means 100, a right and left wind distribution ratio is calculated by a calculating means 500, whereas at the time of automatic control, a right and left wind distribution ratio in accordance with a control characteristic where a wind distribution range corresponding to the direction of solar radiation is defined larger in the side of a driver's seat than in the side of an front passenger's seat, is calculated by a calculating means 600. In accordance with the wind distribution ratio, right and left wind distribution doors 24 are driven by a driving means.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a vehicle air conditioning control device that automatically and manually controls left and right air distribution balance in a vehicle interior.
In particular, the present invention relates to a vehicle air conditioning control device that performs automatic control with priority given to the driver's seat side.

(Prior Art) Conventionally, it has been proposed to automatically change the amount of air blown from the left and right outlets in accordance with the amount of solar radiation on the left and right sides of a vehicle interior. For example, in Japanese Utility Model Application Publication No. 54-97947, an attempt is made to improve the feeling of air conditioning control by automatically changing the air conditioning balance based on the air volume control of the left and right outlets according to the balance of the left and right solar radiation. It is disclosed that

(Problem to be Solved by the Invention) However, in the conventional example described above, the driver is always present when the vehicle is operated, but there are times when there is a passenger in the passenger seat and there are times when there is no passenger. If left and right air distribution control is performed with automatic control characteristics, a large amount of air will be unnecessarily distributed to the passenger seat side, and I would like to have even more air volume on the driver seat side.

The drawback was that it was difficult to do so even in certain cases.

Therefore, this invention solves the above-mentioned conventional problems, and
An air conditioning control device for a vehicle having control characteristics in which the air distribution control width on the passenger seat side is reduced to a predetermined minimum compared to the air distribution control width on the driver seat side, taking into account that there are often no occupants in the passenger seat. The challenge is to provide the following.

(Means for Solving the Problems) As shown in FIG. A vehicle interior head temperature sensor 29 that detects the temperature in the vehicle interior including the temperature near the heads of occupants in the vehicle, and at least the right and left air outlets 21 and 20 in the vehicle interior 30 on the downstream side of the air conditioning duct. left and right ventilation doors 24 that change the distribution of air volume blown out from a plurality of air outlets, and left and right air outlets 2 in the passenger compartment 30;
an air distribution amount setting means 100 for arbitrarily setting an air amount distribution of 0.21; a solar radiation direction calculation means 200 for calculating the direction of solar radiation based on the amount of solar radiation detected by the solar radiation sensor 25; a solar radiation calculation means 300 for calculating the intensity of solar radiation based on the solar radiation amount and the head temperature; and a manual air distribution system that calculates the left and right air distribution ratio according to the position set by the air distribution amount setting means 100 when the calculation result of the control method calculation means 400 is manual control. Ratio calculation means 500
When the calculation result of the control method calculating means 400 is automatic control, the left and right air distribution ratio is adjusted according to the control characteristic in which the air distribution control width according to the solar radiation direction is larger on the driver's seat side than on the passenger seat side. Auto air distribution ratio calculation means 60 to calculate
0, and the automatic or manual air distribution ratio calculation means 600
Alternatively, the air distribution control means 2340d is provided to control the left and right air distribution doors 24 according to the calculation result of 500.

(Function) Therefore, the left and right solar radiation sensors 25 detect the left and right solar radiation amounts, and based on the detected solar radiation amounts, the solar radiation direction calculation means 200 and the solar radiation amount calculation means 300 calculate the solar radiation direction and the solar radiation amount, respectively. Ru. Furthermore, based on this amount of solar radiation and the head temperature detected by the vehicle interior head temperature sensor 29, the control method calculation means 400 determines whether the left and right air distribution control is automatic or manual. When the calculation result of the control method calculation means 400 is manual control, the manual air distribution ratio calculation means 500 calculates the left and right air distribution ratios (in proportion) according to the position set by the air distribution amount setting means 100. ,
When the calculation result of the control method calculation means 400 is automatic control, the automatic air distribution ratio calculation means 600 adjusts the air distribution control width according to the solar radiation direction to the left and right according to the control characteristic that is larger on the driver's seat side than on the passenger's seat side. The wind ratio is calculated. Furthermore, the left and right ventilation doors 24 are driven by the ventilation drive means 23, 40d according to the calculation result of the automatic ventilation ratio calculation means 600 or the manual ventilation ratio calculation means 500, and the predetermined ventilation control is performed in a distant manner. It is something that will be done.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. In FIG. 2, the vehicle air conditioning control device includes an inside air population 2 and an outside air population 3 provided at the most upstream side of an air conditioning duct 1, and an inside/outside air switching door 5 at the part where the inside air population 2 and outside air population 3 are separated. A desired intake mode can be obtained by operating the inside/outside air switching door 5 using an actuator 6 to select the air to be introduced into the air conditioning duct 1 between inside air and outside air.

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 piping together with a compressor, a condenser, a receiver tank, and an expansion valve (not shown) to form a refrigeration cycle.

A heater core 9 is arranged behind the evaporator 8, and an air mix door 10 is arranged upstream of the heater core 9.
is provided, and by adjusting the opening degree of this air supply store 10 with an actuator 10a, the amount of air passing through the heater core 9 and the amount of air bypassing the heater core 9 can be changed, thereby increasing the amount of blown air. It is temperature controlled.

On the downstream side of the air conditioning duct 1, a defrost outlet 11, a vent outlet 12, and a foot outlet 13 open into the vehicle interior 30, and mode doors 14, 15, and 16 are provided at each outlet. There is. This mode door 1
On the downstream side of 5, there are provided a right side air outlet 21 that opens at the right side in the vehicle compartment 30, a left side air outlet 20 that opens at the left side in the same way, and a center air outlet 19. Left and right ventilation doors 24 are provided in front of the arranged partition plate 22. Said mode door 14.15.
16 is controlled by an actuator 17, and the left and right air distribution doors 24 are controlled by an actuator 23, respectively, so that a desired blowing mode and air volume distribution can be obtained.

The motors of the actuators 6.10a and 1723 and the blower 7 are driven by drive circuits 40a and 40b, respectively.
The drive circuits 40a to 40e are controlled based on output signals from 40c, 40d, and 40e, and are connected to the microcomputer 33.

On the other hand, a solar radiation sensor 25 that detects the left and right solar radiation amount S□+SLI, an outside air temperature sensor 26 that detects the outside air temperature Ta,
Detection from the vehicle interior temperature sensor 27 that detects the vehicle interior temperature Tr, the mode sensor 28 that detects the downstream temperature Te of the evaporator 8, the vehicle interior head temperature sensor 29 that detects the temperature of the occupant's head, etc. The signal is selected by the multiplexer 31 and input to the A/D converter 32, where it is converted into a digital signal and then sent to the microcomputer 3.
3 is input.

The control panel 38 includes an auto switch 38a that switches between auto control and manual control, an off switch 38b that turns off all operation switch groups, an air conditioner switch 38C, a vent switch 38d that is a mode switch, a pie level switch 38e, and a heat switch 38f. and a differential switch 38g, fan switches 38h, 38i, 38j for changing the rotational speed of the blower 7, an up/down switch 38 for setting the set temperature T, 1 in the passenger compartment 30, and a temperature display section 381, etc. These setting operation signals are input to the microcomputer 33.

Furthermore, the left and right air distribution control levers 3 should be installed at or near the control panel 38 yen.
A setting signal from 9 (having a knob 39a) is also manually input to the microcomputer 33.

Next, an example of the air conditioning control operation of the microcomputer 33 will be explained with reference to the flowchart shown in FIG. The process starts from a start step 50, and in step 52, data input processing of detected values of each sensor is performed. That is, the solar radiation sensor 25
, each detection value S R11S Ll+ T from the outside air temperature sensor 26, the vehicle interior temperature sensor 27, the mode sensor 28, etc.
a, Tr, Te, etc. in the microcomputer 33
Enter. In the next step 54, the vehicle interior temperature T set by the up/down switch 38k is
1- data input processing is performed, and the process proceeds to step 56, the solar radiation-next delay processing routine. Although this solar radiation-next delay processing routine will not be described in detail in this embodiment,
The sudden rise in response to the change in +SLI with respect to time is corrected in a manner of gradual increase to, for example, S...SL2, and is intended to smooth out the change in air conditioning accompanying the rise in the amount of solar radiation. In the next step 58, a solar radiation azimuth calculation routine (described later), a solar radiation azimuth is calculated, and the process proceeds to step 60, a solar radiation amount calculation routine (described later). In this step 60 solar radiation calculation routine, the solar radiation amount Ts is calculated, and the process proceeds to step 62. Although this step 62 solar radiation secondary delay processing routine will not be described in detail in this embodiment, it corrects the sudden fall of the solar radiation correction value SR The aim is to smooth out the accompanying changes in air conditioning.

Then, the process proceeds to the next step 64, where the total signal T is calculated. The calculation of this total signal T is performed using, for example, the detection values of the respective sensors as follows: T=Tr + KaTa+KsTs +K
e Te −, t 'rs*t +c (however, K
a −, K s −, K e % (K s e t is a gain constant, C is an arithmetic constant). Next step 6
In step 6, the target opening degree of the air mix door 10 is calculated from the comprehensive signal, and the process proceeds to step 68. In step 68, the actuator 1 is
0a to control the air mix door 10, and proceed to step 70. In step 70, the target air volume of the blower 7 is calculated, and the process proceeds to step 72. In step 72, the blower motor is driven based on the calculation result of the target air volume, and the process proceeds to step 74, which will be described later in a left and right ventilation door control amount calculation routine. This left and right ventilation door system? In the Il amount calculation routine, the control method (auto or manual) of left and right air distribution control is determined based on the solar radiation amount Ts and the vehicle interior head temperature T, h, and the left and right air distribution control method in the determined control method is determined. The control amount of the door 24 is calculated. In the next step 76, the drive circuit 40d drives the left and right ventilation doors 24 via the actuator 23 based on the control amount for the left and right ventilation doors 24 calculated in step 74. Thereafter, the process returns to the start step 50 via the return step 78.

Next, the control of the solar radiation azimuth calculation routine shown in FIG. 4 will be explained. Starting from step 90, in step 92 it is determined whether the right solar radiation sensor SR is malfunctioning (short-circuit failure), and if YES, the process proceeds to step 94 to set the solar radiation direction to the center, and then proceeds to return step 104. The process proceeds to the left and right air distribution control routine. If NO, proceed to step 96. In step 96, it is determined whether the left solar radiation sensor SL is malfunctioning (short-circuit failure),
If YES, the process proceeds to step 94, and if No, the process proceeds to 98, where the detected value S of the right solar radiation sensor and the detected value SLI of the left solar radiation sensor are compared, and S□≧S
If LI, proceed to step 101; if S□<SLI, proceed to step 102. In step 101, the solar radiation direction is calculated in the right direction, that is, if the solar radiation azimuth angle in the right direction is DR, D=, ・(S□−3L,)/S□(
However, after performing the calculation (K2 is a constant), the process proceeds to return step 104. In step 102, the solar radiation direction is calculated in the left direction, that is, if the solar radiation azimuth angle in the left direction is DL, then D
After performing the calculation of .(SLIS□)/SL+ (where K1 is a constant) on L=, the process proceeds to return step 104.

This return step 104 returns to the air distribution control routine.

Next, the control of the solar radiation calculation routine shown in FIG. 5 will be explained. Starting from step 110, step 112
In this case, the right solar radiation sensor SR is malfunctioning (short circuit malfunction).
If YES, step 11
4, and if No, proceed to step 116. In step 114, it is determined whether the left solar radiation sensor SL is malfunctioning (short-circuit failure), and if YES, the process proceeds to step 11B, where the solar radiation it (solar radiation intensity) Ts is set to 0, and then the process proceeds to return step 132. move on. N.

If so, the process proceeds to step 120, where the detected value S of the left solar radiation sensor SL is set to the solar radiation 11Ts, and the process proceeds to the return step 132. In step 116, it is determined whether or not the left solar radiation sensor SL is malfunctioning (short-circuit failure), and if YES, the process advances to step 122;
If so, proceed to step 124. In the step 122, the detected value SRI of the right solar radiation sensor SR is set in the solar radiation iTS, and the process proceeds to the return step 132. In step 124, the detected value S□ of the right solar radiation sensor SR and the detected value SLI of the left solar radiation sensor SL are compared,
If S□≧SLI, proceed to step 126, and S□<S
If it is LI, the process advances to step 128. In step 126, a composite value (S□+St,)/2 ( however,
K2 is a constant), and (S□+5LI)/Kg≧S
If it is RI, proceed to step 130, and (SRI + 5
LI), / Kg< SRI, step 12
Proceed to step 2. On the other hand, in step 128, a composite value of the detection value S of the left solar radiation sensor SL, the detection value 5l11 of the right solar radiation sensor SR, and the detection value SLI of the left solar radiation sensor SL (S□+SL,) /Kg (However, K2 is a constant), and if (S□+5LI)/Kg≧SLI, proceed to step 130, and (SRI +5LI)/
If Kg<SLI, the process proceeds to step 120. In the step 130, the composite value (S□+S+-+)/Kg of the detection value S□ of the right solar radiation sensor SR and the detection value S of the left solar radiation sensor SL is set in the solar radiation ITs, and in the return step 132, Then, the process returns to the main routine described above.

Next, the control of the flowchart of the left and right ventilation door control amount calculation routine shown in FIG. 6 will be explained. Start step 1
40, and in step 142 it is determined whether the set position of the left and right air distribution control lever 39 (hereinafter referred to as the air distribution lever 39) is at the left end (-5), and if YES, the process proceeds to step 144 and the left The air outlet 20 is fixed to be fully open, and the process proceeds to return step 166. If NO, the process proceeds to step 146. In this step 146, it is determined whether the set position of the air distribution lever 39 is at the right end (+5), and if YES, the process proceeds to step 14B, where the right side outlet 21 is fixed at full open, and the process proceeds to return step 166.
If no, the process proceeds to step 150. This step 15
0, it is determined whether or not the blowout mode is the vent mode. If YES, the process proceeds to step 154; if NO, the process proceeds to step 152. In this step 152, the blowout mode is pie level mode (Bl-Ll or Bl-
L2 or BI-L3) and determine whether YE
If S, the process proceeds to step 154, and if No, the process proceeds to step 156, where the left and right ventilation doors 24 are fixed at the center, and the process proceeds to return step 166. Said step 154
In this step, calculations are performed to determine whether left and right air distribution control in the vehicle interior is automatic or manual based on the solar radiation amount Ts and the vehicle interior head temperature Trh. That is, the seventh
As shown in the figure, when the solar radiation 11Ts is relatively high and the vehicle interior head temperature 'rrh is relatively low [region (A)], it is set to auto, and when the solar radiation 'FJTs is relatively low, the vehicle interior head temperature Trh is set to auto. When is relatively high [area (B)], use manual. Note that the region (B) is a region where the air distribution lever 39 is often moved arbitrarily, and the region (C) is a dead zone. After that, the process proceeds to step 158, where the set temperature T in the vehicle interior is set.
Determine whether set is set to the lowest temperature (MAX C00L), and if YES, step 16
If no, the process proceeds to step 162. In this step 162, it is determined whether or not the calculation result of the step 154 is automatic control. If YES, the process proceeds to step 164, and if NO, the process proceeds to the step 160.
Proceed to. In this step 160, the air distribution lever 39
Perform manual settings for left and right air distribution. That is, as shown on the right side of FIG. 8, in the manual setting, the setting position of the air distribution lever 39 and the air volume ratio of the left and right air outlets 20.21 (the opening degrees of the left and right air distribution doors 24) are in a direct proportional relationship. After this step 160, the process proceeds to a return step 166. Furthermore, in step 164, the left and right air distribution control amount is calculated by automatic control. That is, as shown in FIG. 8, the left and right air distribution ratios are determined according to the solar radiation direction calculated based on the left and right solar radiation detection values S□+SL+.

In the same figure, for example, the solar radiation direction is from +40° to +60°.
(when the solar radiation is coming from the right side of the vehicle, i.e., the solar radiation is mainly hitting the driver's seat side), the right air outlet 2
The wind distribution increase rate (8%) in No. 1 is, for example, 30%, and when the solar radiation direction changes from 140° to 160° (solar radiation shines from the left side of the vehicle, that is, solar radiation mainly hits the passenger side). ) is the air distribution increase rate of the left air outlet 20 (b
%) is, for example, 20%, and the relationship a>b holds,
This indicates an automatic control characteristic in which the amount of increase in air distribution on the driver's seat side during solar radiation is greater than the amount of increase in air distribution on the passenger seat side. This control characteristic is such that, as shown by the broken line in the figure, the air distribution lever 39 moves to the left or right on the left and right ventilation door opening axis according to the set position of the ventilation lever 39. This step 1
After 64, the process proceeds to return step 166 and returns to the main routine described above.

In this embodiment, one parameter of the control method calculation means that determines the control method for left and right air distribution control including the setting of the air distribution lever 39 is replaced with the vehicle interior head temperature T, h, and the vehicle head temperature related thereto. The room temperature Tr may also be used.

Further, in the above embodiment, a passenger seat air distribution switch (not shown) is provided on or near the control panel 33, and the air distribution control is performed by reducing the increased air volume on the passenger seat side only when there is no occupant in the passenger seat. It is also possible for the driver to operate the switch at will.

(Effects of the Invention) As explained above, according to the present invention, the left and right air distribution control widths during solar radiation are made different, and the control characteristic in automatic mode is such that the width is increased on the driver's seat side and less on the passenger's seat side. Therefore, while driving, you can always improve the air conditioning feeling on the driver's seat side where the passenger is.Especially when using the vehicle for commuting, etc.
This has the effect of significantly improving the product appeal for users who often do not have a passenger in the passenger seat.

[Brief explanation of drawings]

FIG. 1 is a functional block diagram showing the configuration of the present invention, FIG. 2 is a configuration diagram showing a vehicle air conditioning control device in an embodiment of the invention, and FIG. 3 is a flowchart showing the main routine of the microcomputer used in the above. FIG. 4 is a flowchart showing the solar radiation direction calculation routine, FIG. 5 is a flowchart showing the solar radiation amount calculation routine, FIG. 6 is a flowchart showing the left and right ventilation door control a amount calculation routine, and FIG. 7 is a flowchart showing the solar radiation amount calculation routine. Fig. 8 is a characteristic diagram showing the control amount of the left and right air distribution ratio based on the solar radiation direction and the setting position of the air distribution lever in automatic control. be. 2021... Left and right air outlets, 24... Left and right ventilation doors, 25... Solar radiation sensor, 29... Vehicle interior head temperature sensor, 33... Microcomputer, 39... Left and right ventilation control Lever (air distribution lever), 23°40
d...Air distribution drive means, 100...Air distribution drive means 20
0: Solar radiation direction calculation means, 300: Solar radiation amount calculation means, 400: Control method calculation means, 500: Manual air distribution ratio calculation means, 600: Automatic air distribution ratio calculation means. Figure 4

Claims (1)

[Scope of Claims] At least two solar radiation sensors that detect the amount of solar radiation on the right and left sides of the vehicle interior, and a head portion of the vehicle interior that detects the temperature inside the vehicle interior, including the temperature near the head of an occupant inside the vehicle interior. A temperature sensor, a left and right air distribution door that changes the volume distribution of air blown out from a plurality of air outlets including at least right and left air outlets in the vehicle interior on the downstream side of the air conditioning duct, and left and right air outlets in the vehicle interior. an air distribution amount setting means for arbitrarily setting the airflow distribution at the mouth; a solar radiation direction calculating means for calculating a solar radiation direction based on the solar radiation amount detected by the solar radiation sensor; and a solar radiation intensity calculation means for calculating the solar radiation direction based on the solar radiation amount. a control system that performs a calculation to determine whether left and right air distribution control in the vehicle interior should be automatic control or manual control based on the solar radiation amount and the vehicle interior head temperature. calculation means; when the calculation result of the control method calculation means is manual control, manual air distribution ratio calculation means for calculating the left and right air distribution ratio according to the position set by the air distribution amount setting means; and the control method calculation means. When the calculation result of the means is automatic control, an automatic air distribution ratio calculation that calculates the left and right air distribution ratio according to a control characteristic in which the air distribution control width according to the solar radiation direction is larger on the driver's seat side than on the passenger seat side. An air conditioning control device for a vehicle, comprising: a means for calculating the air distribution ratio; and an air distribution drive means for driving the left and right air distribution doors according to the calculation result of the automatic or manual air distribution ratio calculation means.