JPS5940920A - Control device for vehicle air-conditioning system - Google Patents

Abstract

PURPOSE:To simplify the control of an air-conditioning system by a passenger, by operating an air-conditioning operating device through the control of the passenger upon the fixed setting mode in accordance with a selecting signal of air-conditioning functioning factors, and by operating all operating devices upon the automatic setting mode in accordance with environmental signals. CONSTITUTION:When an automatically setting switch 90 is operated, an inside and outside air switching damper and a blow-off switching damper are controlled in accordance with environmental signals indicative of inside and outside air temperatures and a quantity of solar radiation. Upon this automatic control mode when any one of an inside air switch 86, an outside air switch 87, a vent blow-off switch 91 and a defroster blow-off switch 92 is operated, the associated operating device alone is set to the fixed setting mode, but the other operating device are maintained under the automatic control mode. Thereafter, when the automatically setting switch 90 again operated, all operating devices are automatically set to the operating mode. Thus, even though a certain selected operating device is fixedly set to the desired operating mode the other operating devices are maintained under the automatically setting mode, thereby the control of a passenger may be made simple.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has a plurality of air function elements, and the operating states of these (1) can be fixedly set according to the occupant's wishes or automatically set according to the environmental conditions. The present invention relates to a car air conditioner control device.

Automatically controlled car air conditioners, generally referred to as automatic air conditioners, also have a function that enables fixed settings to activate air conditioning function elements according to the passenger's wishes.

However, in order to perform fixed settings and automatic settings, a large number of operation switches are required, resulting in the problem that the configuration becomes complicated and it takes time for the occupants to get used to the operation. .

In view of this problem, it is an object of the present invention to provide a car air conditioner control device that can easily implement fixed setting operations and automatic setting operations.

Therefore, the car air conditioner control device according to the present invention is the 21st
As shown in the figure, a plurality of air conditioning functional elements A (26, below the numbers in parentheses indicate the codes in the examples), B (36 to 42), (2) each air conditioning functional element A, B independently. Actuating device C (
46), D (50, 52, 54,).

Selection signal generating means E ( 76, 86, 87, 90, 91, 92), environmental signal generating means F (68, 69, 70, 72) that generates an environmental signal corresponding to environmental conditions, and a fixed Setting 86.87
．． 91.92) is selected, the corresponding actuating devices C and D are activated in accordance with the occupant's behavior, and the automatic setting (91.92) is selected.
0) is selected, electric control means G (66) for actuating all the actuating devices C and D in response to an environmental signal from the environmental signal generating means F.

Therefore, the air conditioning functional elements A and B are, for example, the air conditioning duct 1
(3) An inside/outside air switching damper that selects the intake of air into the passenger compartment from the inside of the vehicle or outside the vehicle (3), and a blowout switching damper that selects the direction of air discharge from the air conditioning duct 10 to the passenger compartment. .

To explain with reference to the reference numerals of the embodiments described below, the selection signal generating means E includes an inside air switch 86 that fixes the intake of inside air, and an outside air switch 87 that fixes the intake of outside air.
, a vent blowout switch 91 for fixedly setting the vent blowout;
A defroster blowout switch 92 for fixedly setting the defroster blowout, and an automatic setting switch 90 are provided.

The computer unit 66 as the electric control means G receives environmental signals (inside temperature,
external temperature, etc.) is input.

The electric control means G discriminates the signal from the selection signal generating means E, and controls the operation of the actuating device C1D according to the result of the discrimination. In this case, the fixed setting switch 86.8
7.9 When any one of 91 and 92 is operated, the electric control means G activates the actuating device to realize any of the inside air intake, outside air intake, vent blowout, and heater blowout in response to the operation (4). Activate.

However, when the automatic setting switch 90 is operated, the operating states of both the actuating devices C and D are controlled based on the environmental signal from the environmental signal generating means F. In this automatic control state, when any of the fixed setting switches is operated, only the actuating device corresponding to the operation is set to the fixed state,
Other actuators remain under automatic control. If the automatic setting switch 90 is operated again after that, all actuating devices C
The operating state of 1D is automatically set.

As described above, according to the configuration of the present invention, the operating states of a plurality of actuating devices can be automatically set at once, and only a specific actuating device among them can be fixedly set to a desired operating state. , other actuators can maintain automatic settings, significantly facilitating occupant operation.

The present invention can be applied to setting the operating state of the heat exchange means H in addition to six switching between inside and outside air and switching between air outlets.

(5) An embodiment of the present invention will be described in detail.

Figure 1 shows the arrangement of the main mechanical and electrical functional elements.

Reference numeral 10 indicates an air conditioning duct placed in the front part of the passenger compartment, and an outside air intake 12 and an inside air intake 14 are provided in the upstream part of the ventilation path.
A heater outlet 16, a defroster outlet 18, and a vent outlet 20 are provided in the downstream portion.

The air conditioning duct 1° has an outside air intake 12 and an inside air intake 14.
Internal/external air switching damper (R/F damper) that opens and closes complementary to
, Blow fan 2 days, Cooler core (evaporator) 30 days,
A heater core 32, an air mix damper (A/M damper) 34 that changes the distribution of air passing through the heater core and air passing through its side passages, a heater blow-off damper (H/T damper) 36 that opens and closes the heater blow-off port 16, A differential outlet damper (D/F damper) 38 that opens and closes the differential outlet 18 in conjunction with the T damper 36, a Ghent outlet rod damper (■/T damper) 4o that opens and closes the vent outlet 20 and the differential outlet 18, and (In the downstream part of the air conditioning duct, the air that has passed through the heater core 32 and its side passage is mixed) (6) A process for bypassing the Amisox chamberer 22 to send air that has not passed through the heater core 32 to the vent outlet 20 A pie level blowout damper (B/L damper) 24 is arranged to open and close the bypass duct 24.

The configuration of the air conditioning unit described above is well known.

The blowout mode in this air conditioning unit is as follows.

+1) Vent blowout: H/T damper 36 closes heater blowout port 16 (a small amount of air is blown out from heater blowout port 16 due to a slight gap). V/T damper 22 opens vent blowout port 20. , the B/L damper 42 closes the bypass duct 24, and as a result air is blown out from the vent outlet 20 toward the center of the vehicle interior and to the left and right.

(2) Pie level blowout (automatic control): H/T damper 36
opens the heater outlet 16, the V/T damper 38 opens the vent outlet 20, and the B/L damper 42 closes the bypass duct 24. As a result, air flows from the vent outlet 20 and the heater outlet 16 to the center of the vehicle interior, Air is blown out to the left and right and toward the passenger's feet.

(7) (3) Pie level blowout (manual): H/T damper 36 opens heater outlet 16, V/T damper 38 opens vent outlet 20, and B/L damper 42 opens bypass duct 24.
As a result, vent outlet 20 and heater outlet 1 are opened.
8, air is blown out toward the center of the cabin, left and right, and towards the passenger's feet. In this case, the air blown from the vent outlet 20 may be lower in temperature than the air blown from the heater outlet 18 because the air is not heated by the heater core 32 from the bypass duct 24 .

(4) Heater outlet: H/T damper 36 is the heater outlet 1
6 is opened, the V/T damper 38 closes the vent outlet 20, the B/L damper 42 closes the bypass duct 24, and the H/T damper 42 closes the bypass duct 24.
The D/F damper 3B that works in conjunction with the T damper 36 closes the differential air outlet 18 (however, there is a relatively large gap), and as a result, air is blown out from the heater outlet 16 toward the occupant's feet, and air is blown out from the differential air outlet 18. Also blows out air (approximately 20% of the heater blowout amount) toward the windshield.

(5) Differential air outlet: The H/T damper 36 is connected to the heater air outlet (8
) 16 (there is a slight gap), V/T damper 38
closes the vent outlet 20, the B/L damper 42 closes the bypass duct 24, and the D/L damper 42, which operates in conjunction with the H/T damper 36,
The T-damper 38 opens the differential air outlet 18, and as a result, air is blown from the differential air outlet 18 toward the windshield.

In the air conditioning duct 10, 44 indicates a blower register disposed downstream of the blower fan 28, the details of which will be described later.

46.4B, 50.52.54 are the above-mentioned dampers 26.3
4.36, 40.42, each damper is driven independently in response to the air pressure applied from the solenoid valve unit 62 through the air piping. These actuators pull the output end by negative pressure,
It is configured to be pushed back by a built-in spring. The solenoid valve unit 62 includes five two-path switching type solenoid valves 62a and 62b.
, 62e, 62f, 62g, and two one-path switching type solenoid valves 62c, 62d. Further, this unit 62 is supplied with intake pipe negative pressure of an on-vehicle engine (not shown) through a pipe 63a, negative pressure tank 63, and pipe (9) 63b, and atmospheric pressure is supplied through a pipe 63C. Valve 6
Gives 28-62g of piping.

Two-path switching type solenoid valves 62a, 62b, 62e.

62f and 62g switch the air pressure applied to the negative pressure actuators 52 to 58 between atmospheric pressure and negative pressure according to energization and deenergization by electric energy. Solenoid valve 62c
, 62d separately control the supply and stop of atmospheric pressure and negative pressure, and when the solenoid valve 62C is energized and opened, the air pressure applied to the negative pressure diaphragm 48 is gradually brought closer to atmospheric pressure, and the solenoid valve When the circuit 62d is energized to open, the air pressure applied to the negative pressure diaphragm 48 is gradually brought closer to the engine negative pressure value.

Reference numeral 56 indicates a known refrigerant compression/expansion type refrigeration unit, and is a refrigerant compressor (compressor) 56a.

It includes expansion pulp 57 and cooler core 30. This refrigeration system unit is attached to a compressor 56a, and when the electronic clutch 64 is energized, the compressor 56a is driven by receiving rotational power from the on-vehicle engine, whereby the refrigeration system unit is put into operation and cools the cooler (10) and the core 30. . Although not shown, the refrigeration unit 5
Reference numeral 6 includes a known mechanism for adjusting the amount of refrigerant circulation so that the surface temperature of the cooler core 30 is approximately 0°C.

Reference numeral 58 denotes a diaphragm-operated hot water valve, which has the role of switching between starting and stopping the heating action of the heater core 32 by opening and closing the engine cooling water pipe passing through the heater core 32. This hot water valve is driven by a solenoid valve 62f in the solenoid valve unit 62.

Reference numeral 60 rotates the blower fan 28 using an electric motor (blower motor) to generate forced gout in the air conditioning duct 10.

66 is an electric control device (computer unit) that supplies electric energy to each solenoid valve of the solenoid valve unit 62, the electromagnetic clutch 64 that operates the refrigeration unit 56, and the blower electric motor 60, thereby controlling the vehicle. Control indoor air conditioning. In order to provide control conditions, temperature sensors (interior temperature sensors) 68 are installed at two locations in the vehicle interior (front of the vehicle; in front of the passenger seat, near the instrument panel; rear of the vehicle; near the rear tray).
゜69, a total of 4 temperature sensors (outside temperature sensor) 70 located at the engine cooling air intake, and a temperature sensor (solar radiation sensor) installed on the upper panel of the instrument panel under the windshield
Temperature sensors are prepared, and the detected temperature signals are supplied to the electric control device 66. Further, a servo position detection unit 74 is provided for extracting a signal corresponding to the position of the output shaft of the temperature control diaphragm actuator 48. This unit 74 is a potentiometer (74a; described later) that generates an opening signal proportional to the opening of the A/M damper 34.
and A/M damper 34 maximum cooling position detection switch (74
b; (described later) and a speed change switch (75
; described later).

A front seat operating unit 76 and a rear seat operating unit 76 are used to instruct the operation of the computer unit 66 by the passenger and display the operating status of the air conditioner to the passenger.
7B Connected to the computer UniSoto 66. The front seat operation unit 76 is installed in the center of the vehicle instrument panel, and the rear seat operation unit 78 is installed at the back of the front seat backboard (at a position W visible from the rear seat).

FIG. 2 shows the arrangement of switches on the surface of the front seat operation unit 76. A sliding speed change switch (blower switch) 80 for blowing air is arranged in the center, and its contact mechanism is provided on the back of the panel.

Note that this switch allows the motor 60 to be set to low or medium.

High speed rotation and automatic gear shifting are determined. An up switch 82 and a down switch 83 are provided on the left side of the panel (in a right-hand drive vehicle, a position close to the driver) for generating a command signal to raise or lower the target temperature (set temperature) for control. A total of 3 digits issued number display 85 including 1 digit after the decimal point
a is placed near the up and down switches 82 and 83. This display 85a is used to display the set temperature.

Reference numerals 86 to 94 represent a group of switches for commanding the control mode or operation mode of the air conditioner, and each switch generates a signal indicating the next command when activated.

(13) (11 Inside air switch (REC switch) 86; Open the inside air intake port 14 using the R/F damper 26.

(2) Outside air switch (FRS switch) 87; Open the outside air intake port 12 using the R/F damper 26.

(3) Economy switch (ECONO switch) 88;
Stop the cooling action of the cooler core 30 (operation of the refrigeration unit 56) and adjust the temperature.

(4) Air conditioner switch (A/C switch) 89; activate the cooling action of the cooler core 30 to adjust the temperature.

(5) Auto switch (AUTO switch) 90; Automatically control.

(6) Vent blowout command switch (VENT switch) 9
1; Set to vent blowout mode (described above).

(7) Differential blowout command switch (DEF switch) 92
; Set to differential blow mode (described above).

(8) Pie level blowout command switch (B/L switch)
93; Set to pie level blowout mode (manual above).

(9) Heater blowout command switch (HEAT switch) (
14) 94; Set to heater blowout mode (described above).

The switches 82, 83 and 86 to 94 are of the self-resetting type and are operated by a push button, and a lamp is housed in the back of each switch so that the name plate of the switch can be read when the switch is lit.

A sound hole 77 for emitting sound from a buzzer (described later) stored in the back is provided on the panel surface.

FIG. 3 shows the arrangement of switches on the surface of the rear seat operation unit 78. The up and down switches 96 and 97 have the same configuration and function as the up and down switches 82 and 83 in the front seat operation unit 76.

Figure 4 shows the overall electrical connections.

Reference numeral 98 is an on-vehicle battery, which is a source of electrical energy for the entire device. 100 is an engine key switch, which is an ignition switch (IC switch) for a gasoline engine. To the computer unit 66, a cotton 67
directly by line 67b and via IG switch 100 by line 67b.

A blower relay 102 applies a power supply voltage to one end of the blower motor 60 when activated. The other end of the blower motor 60 is grounded via the blower resistor 44 and the blower switch 80. Further, it is connected from the plow register 44 to the plow switch 44 via the speed change switch 75 in the servo position detection unit 74 . When the movable piece 81 of the blower switch 80 is operated to Hi, Me, Lo, or AUTO, the blower relay 102 is energized and a required voltage is applied to the blower motor 60.

Further, the turning on of the blower switch 80 is notified to the computer unit 66 through the line 66a. Prower switch 80
When the operation position is Hi, the battery voltage is directly applied to the blower motor 60 without passing through the blower register 44, and the blower motor 60 is rotated at high speed.

In Me([, the blower motor 60 is powered through three resistors and rotates at a medium speed. In the LO position, the blower motor 60 is powered through five resistors and rotates at a low speed.

When the blower switch 80 is operated to the AUTO position, the speed change switch 7 corresponds to the position of the A/M damper 34.
5 contact point 758 position changes step by step, A/M damper 3
4 moves from the intermediate position to the fully open and fully open positions, the number of blower registers is reduced, and the air conditioning duct 10
To automatically relate the temperature of air blown out from the air and the air volume.

A starter cut relay 104 is energized when the engine key switch is turned on to a starter contact (not shown), and forcibly de-energizes the blower relay 102. As a result, the blower motor 60 is stopped during cranking.

106 and 108 are warm-up cut relays and warm-up relays that function when the blower switch 80 is operated to the AUTO position, and when the line 662 is energized by the computer unit 66, the water temperature switch 110, 112 is energized and opens its relay contact.The first water temperature sensor 110 closes and warms up when the engine coolant temperature is below 30°C (therefore, the heating capacity of the heater core 32 is completely insufficient). 1
7) Open the up cut relay 106 and close the heater relay 102.
The blower motor 60 is not operated due to the energization of the hyphae. A
To enable this only in the UTO position, a backflow prevention diode 81a is provided. Second water temperature switch 1
12 closes when the engine coolant temperature is lower than 50° C. (therefore, the heating capacity of the heater core 32 is insufficient) to open the warm-up low relay 108, and the gear shift switch 7
The automatic speed change control of the blower motor 60 by No. 5 is prohibited, and the rotation speed is fixed at a low speed. AUTO by diode 81a
This is only possible in certain locations.

The signal indicating opening/closing of the second water temperature switch 1120 is 166
It is input to the combinator unit 66 via b.

In the above electrical connection for the blower motor 60, the blower motor 60 is controlled in relation to the A/M damper 32 only in the AUTO position based on the selection operation of the blower switch 80, and is also influenced by the temperature of the heater core 32.

114 is the compressor relay, 116 is the low pressure (18) switch, and line 6 from the computer unit 66.
The compressor relay 114 is energized by the energization command (0'' level) by 6y, which closes its contacts and energizes the electromagnetic clutch 64, thereby putting the refrigeration system unit 56 into operation.Low pressure cut switch 116
is opened when the pressure in the outlet side piping of the cooler core 30 is below a specified level, and the electromagnetic clutch 64 is deenergized to stop the refrigeration unit 56 regardless of the energization command from the computer unit. Reference numeral 118 denotes an electromagnetic device for increasing idle, which increases the idle speed of the vehicle engine in order to capture the power load during driving of the compressor 56a.

Six of the seven solenoid valves 628 to 62e and 62g in the solenoid valve unit 62 receive an activation command ("
0'' level).The solenoid valve 62f for driving the hot water valve 58 is energized when the maximum cooling position detection switch 74b built in the servo position detection unit 74 is closed (A/M damper 34 is near the maximum cooling position).

Energizing (ON) and deenergizing (O) each solenoid valve 62a to 62f
The relationship between FF) and actuator operation is shown below.

(H/T by 11 solenoid valve 62 a-ON-actuator 50
The damper 36 opens the heater outlet 16.

0FF - H/ by actuator 50 Heater with T damper 36 Close the air outlet 16.

(2) Open the bias duct 24 with the B/L damper 36 by the solenoid valve 62b-oN-actuator 54.

0FF - B/ by actuator 54 By μ with L damper 36 Close the suduct 24.

(3) Move the A/M damper 34 closer to the heater core 32 side (cooling side) using the solenoid valve 62C-ON actuator 48.

0FF-Solenoid valve 62d is ON Actuator 48 unless A/M damper 3 Maintain position 4.

(4) Solenoid valve 62d-ON-The actuator 48 moves the A/M damper 34 away from the heater core 32 (moves it to the heating side).

0FF-Solenoid valve 62C is ON Actuator 48 unless A/M damper 3 Hold position 4.

(5) F/R by solenoid valve 62 e-ON-actuator 46
The damper 26 opens the inner air inlet 14.

0FF - F/ by actuator 46 External air intake with R damper 26 Open entrance 12.

(6) Close the solenoid valve 62 f-ON-hot water valve 58.

(21) OFF - Open hot water valve 58.

(7) Solenoid valve 62g-0N-actuator 52 with differential air outlet 1
Open 8.

0FF - Vent blowing with actuator 52 Open exit 20.

120 is a blower-linked clay, and the blower switch 80 is set to O.
When it is turned on to a position other than the FF position, it is energized and closes the relay contact. Note that this blower interlocking relay 120 responds to the turning on of the blower switch 80, and is similar to the start cut relay 104 and the warm-up cut relay 10 described above.
It has nothing to do with the stopping of the blower motor 60 due to the energization of 6.

The blower interlocking relay 120 has the role of supplying and stopping power to the lamp circuit and sensor motor. The sensor motors 132 and 133 rotate small blower fans, and in response to turning on the blower switch 80, that is, in response to a request for air conditioning by a passenger, the inside temperature sensors 88 and 89 are activated.
Create a ventilation environment around the The use of motor-driven fans, called aspirators, is known.

(22) By energizing the blower interlocking relay 120, the dimming relay 12
Battery voltage is applied to one end of the lamps 86a-94a corresponding to the mode switches through two normally closed relay contacts. The other ends of the lamps 86a to 94a are connected to the computer unit 66, and any lamp is turned on in response to a lighting command (0'' level) from the computer unit 66.

122 is a dimming relay, 124 is a lighting relay,
It is energized when the lighting switch 126 of the vehicle is turned on (at night). When energized, the dimming relay 122 opens the relay contact and inserts the limiting resistor 123 into the lamp circuit. Therefore, the lamps 86a to 94a are connected to the lighting switch 12.
60 The light will be lower than before (daytime). The lighting relay 124 closes the relay contact when energized, and provides lamps 82a, 83a, 96a, and 97a for illuminating each of the front seat up/down switches 82.83 and the rear seat up/down switches 96.97. Light. At the same time, a lighting circuit for the lamps 86a to 94a is formed via the diode OR circuit 128 and the resistor 130, and all of the lamps 86a to 94a are lit slightly darker than when the lighting instruction is given from the computer unit 66. Activating the lighting relay 124, that is, turning on the lighting switch 126 (that is, generally at night),
computer unit 66 as the signal level on line 66c.
is input.

A lamp 80a connected in parallel with the coil of the lighting relay 124 is provided on the back of the front seat operating union door 6, and is connected to the letters drawn on the panel surface (operating positions of the blower switch rOFFJ, rAUTOJ, rLOJ, rMe).
J, used to illuminate rHiJ from inside.

The mode switches 86 to 94 are all connected to ground at one end, and input a 0 level signal generated at the time of a push to the computer unit 66 as an operation signal.

Up/down switch for front and rear seats 82,83°96.9
7, all one end is connected to ground, and the up switch 8
The other ends of the 2.96 and down switches 83.97 are commonly connected, and the 0" level signals generated when the button is pressed in the front or rear seats are collectively sent to the computer unit 66 as an up device or down device signal. I am typing.

In the front seat operation unit 76, a digital display unit 85 including the above-mentioned display 85a is connected to the computer unit 66, and a buzzer 77a is connected to an oscillation circuit 77b.
It is connected to a computer unit 66 via.

The temperature sensors 68, 69, 70, and 72 are negative characteristic heat sensitive resistors (
two inside temperature sensors 68 and 69 are connected in series, and the remaining outside temperature sensor 70
and the solar radiation sensor 72 are individually connected to the computer unit 66.
Enter resistance value information (as voltage value) into . Note that the resistance values and temperature coefficients of both are selected so that the value detected by the front internal temperature sensor 68 is given more importance than that of the rear. Potentiometer 74a included in the servo position detection unit 74
inputs the voltage value of the intermediate tap into the computer unit (25) 66.

Although the computer unit 66 will be described in detail later, the computer unit 66 has an empty WI
A main control circuit 133 (see FIG. 8) that controls the temperature, a display control circuit 135 that manages the set temperature, and a general outline (see FIG. 5) are connected to the main computer 13, respectively.
2. It includes a microcomputer called a display computer 134. The two contours 132 and 134 each have a constant voltage circuit 136 and 138, and the main computer 13
2, when the IG switch is turned on, the display computer 134 is constantly supplied with power. The above-mentioned electrical components that exchange signals with the computer unit are equipped with appropriate buffers,
Through the interface, the computer 132.13
Connected to one of 4.

Next, regarding the display control in the computer unit 66, the electrical wiring diagram of FIG. 5 and FIG. 6 are shown.

This will be explained according to the calculation flowchart shown in FIG. First, in FIG. 5, 76.76' is a front seat operation unit, which includes an electroacoustic transducer (buzzer) 77a that generates a buzzer sound, and this buzzer? ? An oscillation circuit to drive the buzzer sound generation of a (26)? 7b, and a photocoupler 85b that optically transmits clock and data display command signals.
, 85c and this photocabra 85b.

A shift register 85d that shifts and stores the display command signal via 85c in 4-bit increments, and a shift register 85d that converts the 3×4 bit signal from this shift register 85d and receives the latch and blank display command signals to drive the display. A decoder driver 85e that generates display drive signals for
, a 7-segment 3-digit display 85a, an up switch 82, a down switch 83, and a blower switch 80.
It is equipped with In addition, the display device 85a1 photocoupler 8
5b, 85c, a shift register 85a, and a decoder driver 85c constitute the digital display unit 85 described above. Further, 98 is a battery, 100 is an ignition switch (IC switch), 124 is a lighting relay, and 133 is a main control circuit.

135 is a display control circuit, MB8851 manufactured by Fujitsu Ltd.
Display computer 1 consisting of a microcomputer of
34, a reference oscillation circuit 134a that generates a reference oscillation signal of several MHz to the display computer 134, and a constant voltage circuit 13 that supplies a constant voltage to the display computer 134.
8, diode 140.141, and capacitor 142
, a reset circuit 143 that detects a voltage level change accompanying constant voltage generation from the constant voltage circuit 138 and generates a reset signal, a buffer 144 that receives set temperature data from the display computer 134, and this buffer 144.
A D/A converter 146 converts the signal into a digital/analog (D/A) signal. And this D/
The analog signal from the A converter 146 is sent to the voltage follower 14.
8 to the analog input of the main control circuit 133. Further, the operation of the main computer 132 is detected by the reset circuit 150, and the detection signal is applied to the display computer 134.

Then, the display computer 134 controls the constant voltage circuit 13
8 and a reset signal from the reset circuit 143 are received at the Vcc terminal and the reset terminal, and the lighting relay 1241 and up switch 82. Down switch 83. Based on the closed state of the blower switch 80 and the up switch 96 and down switch 97 (connected in parallel to the up switch 82 and down switch 83, respectively) of the rear seat operation unit 78 (not shown in FIG. 5). Display command signals (latch, blank, clock) are used to receive each switch signal, execute various arithmetic processing for display control, and display the set temperature on the display 85a.

A buzzer is turned on to generate a data signal) to the shift register 85d and decoder driver 85e, and to control the generation of a buzzer sound from the buzzer 77a.

An off command signal is generated in the oscillation circuit 77b, and set temperature data for transmitting set temperature information to the main computer 132 is generated in the buffer 144. The display combiator 134 also receives a signal from the reset circuit 150 at its standby (STBY) terminal, and when the reset circuit 150 generates a reset signal (29) due to the operation of the main computer 132, it receives the signal from the reset circuit 150 at its standby (STBY) terminal. If the operation of the main computer 132 is stopped and the reset signal is no longer generated after the arithmetic processing continues normally, the main computer 132 stops in a standby state in the middle of the arithmetic processing. Note that 134b is a board with a lasso for outputting set temperature data to the buffer 144. Further, a command signal from the display computer 134 and a signal indicating the operation of each mode switch 86 to 94 from the main control circuit 133 are applied to the oscillation circuit 77b.

The operation of the display control circuit in the above configuration will be explained according to the calculation flowcharts shown in FIGS. 6 and 7.

6 is a calculation flowchart showing the calculation processing of the main routine of the display computer 134, and FIG. 7 is a calculation flowchart showing the calculation processing of the interrupt routine based on the time count of the internal timer.

Now, for the display computer 134, a stabilized voltage is supplied from the battery 98 via the stabilized power supply circuit 138 to the Vcc terminal, and a reset signal accompanying the supply of this stabilized voltage is applied to the reset terminal from the reset circuit 143. Then, this display controller (30) viator 134 becomes operational. From this state, the reset circuit 150 detects that the IG switch 100 is closed and the main computer 132 is activated, and outputs a reset signal to the display computer 134.
When the voltage is applied to the TBY terminal, the display computer 134 starts its arithmetic processing from the start star graph 200 in FIG.

Then, the process proceeds to initial setting step 202, where the RA
Clear all the contents of the various data areas in M to O, set the set temperature data T to a value corresponding to 25°C, set the internal timer, start this internal timer, and repeat the main routine as follows. Proceed to return operation.

At the beginning of the repeated calculations of this main routine, the process proceeds to display calculation step 204, where the set temperature data T is displayed on the display 8.
For digital display of 3 digits (10', 10', 10-') of 5a, 101.100° is converted into 10-1 digit display data and stored in a predetermined area of RAM, and the display step is performed. Proceeding to step 206, the display unit data is synchronized with the clock signal from the 101st digit data to the 10-1 digit data, and is sequentially generated in the shift register 85d via the photocoupler 85b, 85c, and finally the latch signal is generated. is generated in the decoder driver 85e, and the process proceeds to the T output step 208, where the set temperature data T is latched in the latch board 134b and generated in the buffer 144. As a result, the display unit data corresponding to the set temperature data T is held in the decoder driver 85e, and when a blank signal is not applied, a display drive signal is generated to the display 85a to digitally display the set temperature at that time. Further, the set temperature data signal via the buffer 144 is sent to the D/A converter 1.
46 into an analog signal, and the voltage follower 14
8 to the analog input of the main control circuit 133, and is used as temperature setting information for temperature control.

Then, the process proceeds to B flag determination step 210 to determine whether or not the BZ flag is set in a predetermined area of the RAM. Then, proceed to BZ timer set step 212, and set BZ of approximately 50m5ec.
Thailand? TB is set in a predetermined area of the RAM, and the process proceeds to buzzer-on command step 214, where a buzzer-on command signal is generated in the oscillation circuit 77b, and the buzzer 77a generates a buzzer sound. However, if the BZ flag has been reset and the determination in the BZ flag determination step 210 becomes NO,
SW timer set step 2 without going through BZ timer set step 212 and buzzer on command step 214
Proceed to step 16. And this SW timer set step 2
At step 16, a SW timer Ts of approximately 500 m sec is set in a predetermined area of the RAM, and the process proceeds to SW timer flag reset step 218, where the SW timer flag in the predetermined area of the RAM is reset.

Then, the process proceeds to SW timer flag determination step 220, where it is determined whether or not the SW timer flag has been reset.If the SW timer flag is set, the determination is N.
However, if it has been reset, the determination becomes YES and the process proceeds to step 222 for determination of the main processor (33). In this blower switch determination step 222, whether or not the blower switch 80 is closed is determined based on the signal state from the blower switch 80, and when the blower switch 80 is in the open position, that is, the vehicle interior air conditioning is performed. If the blower switch 80 is not closed, the determination becomes NO, and the process proceeds to switch data reset step 226, where the switch data S is reset to 0 to prohibit changing the set temperature. However, when the blower switch 80 is closed, the When the determination in the blower switch determination step 222 becomes YES, the process proceeds to a switch data input step 224, where the signal states from the up switch 82 (96) and the down switch 83 (97) are input as parallel switch data S. Then, the process proceeds to switch state determination step 228, where the switch data S is multiplied by the old switch data SO (described later) (3xSo), and it is determined whether or not the value is O.
(96) or when the down switch 83 (97) continues to be turned on and the old switch data (34) So and switch data S have the value of the update data Su or down data So, the determination will be No. When the conditions other than the above are met, the multiplication value 5XSo becomes O and the determination becomes YES.

Then, the determination in the switch state determination step 228 is YE.
If it becomes S, switch the SW timer flag to step 2.
30, the SW timer flag is set, and the process advances to upswitch determination step 232, where it is determined whether the switch data S is the update data Su. At this time, if the switch data S is the updater Su, the determination becomes YES, and the process proceeds to the updater set step 234 to set the old switch data S to the updater Su. However, if the switch data S is not the updater Su, the The determination becomes No, and the process proceeds to downswitch/sochi determination step 236. Then, in the down switch determining step 236, it is determined whether the switch data S is the down data So, and when it is the down data SO, the determination becomes YES, and the down data setting step 23
The process proceeds to step 8 and sets the old switch data S to the down data SO, but when the switch data S is not the down data SO, the determination becomes No, and the process proceeds to data reset step 240 to reset the old switch data So to 0. Then, after the complete data set step 234, the down data set step 238, and the data reset step 240, or when the determination in the SW timer flag determination step 220 is NO, the process advances to the buzzer flag reset step 242.

On the other hand, the determination in the switch sending determination step 228 is N.
o, that is, when the up switch 82 (96) or the down switch 83 (97) continues to be turned on, the display calculation step 242 and the display salt output step 24
4. Proceed to T output step 246 and perform the same arithmetic processing as steps 204, 206 and 208 described above,
The process returns to the SW timer flag determination step 220.

The flow of calculations regarding various states in steps 220 to 246 above is shown below.

■When the blower switch 80 is in the closed state, the knob switch 8
2 (96), down switch 83 (9'7) is not pressed, or both are pressed at the same time, step 220 → 222 → 224 → 228 → 230 → 2
32 → 236 → 240 ■ When the blower switch 80 is in the open state, the up switch 82
If (96) is newly input, step 220 → 2
22→224→228→230→232→234 ■When the blower switch 80 is closed, the down switch 83
If (97) is newly input, step 220 → 2
22 → 224 → 228 → 230 → 232 → 236 → 23
8 ■ When the blower switch 80 is in the closed state, the a-sive switch 8
2 (96), if the down switch 83 (97) continues to be turned on, step 220 → 222 → 224 → 228 → 242 → 2
44→246→220 ■When the blower switch 80 is in the open state, (37) Step 220→222→226→228→230→2
32→236→240 Note that even if the SW timer flag is set in the SW timer flag set step 230, it is reset when the SW timer flag reset step 218 is reached.
The determination at the SW timer flag determination step 220 is YES. If the determination in the SW timer flag determination step 220 is No, this is the case (2) above, in which the SW timer Ts is counted for a time of 500 m5ec and the SW timer flag is set by an interrupt routine to be described later.

Following the above calculation process, BZ flag reset step 24
8, the BZ flag is reset, and the process advances to up switch determination step 250, where it is determined whether the old switch data So is the update data Su. If the old switch data So is the A-knob data Su, the determination becomes YES, and the process proceeds to upper limit determination step 252, where the set temperature data T is a value corresponding to the upper limit of the set temperature, 32°C (38 ). Then, when the set temperature data T is smaller than the value corresponding to 32°C, the determination becomes NO, and the process proceeds to addition step 254, where the set temperature data T is set to "1" (
The set temperature data T is updated by adding [15 is a value corresponding to 0.5°C], and the process proceeds to BZ flag setting step 256, where the BZ flag is set in order to generate a buzzer sound from the buzzer 77a. The temperature data T is a value corresponding to 32°C and the determination in the upper limit determination step 252 is YE.
When S is reached, steps 254 and 256 are not passed, so the processing for changing the set temperature and generating the buzzer sound is not performed.

On the other hand, when the judgment in the up switch judgment step 250 is No, the process proceeds to a down switch judgment knob 258 to judge whether or not the old switch data So is the down data SD. If the old switch data So is the down data SO and the determination is YES, the process proceeds to lower limit determination step 260, where it is determined whether or not the set temperature data T is a value corresponding to the lower limit of the set temperature, 18°C. do. At this time, if the set temperature data T is larger than the value corresponding to 18°C, the determination becomes No, and the process proceeds to subtraction step 262, where "1" is subtracted from the set temperature data T and updated.
Proceed to Z flag set step 256.

Further, when only one of the up switch 82 (96) and the down switch 83 (97) is not turned on and the determination at the down switch determination step 258 becomes No, or when the set temperature data T reaches 18°C. If it is a corresponding value and the lower limit determination spring 260 makes a YES determination, the set temperature data T is not changed and the buzzer flag is not set, and the process returns to the display unit calculation step 204.

Then, addition step 254 or subtraction step 26
If the set temperature data T is changed in step 2, the displayed temperature data is converted according to the set temperature data T in a display unit calculation step 204. Therefore, display temperature step 206
The digital display on the display 85a is updated by 0°5°C based on the displayed temperature data output at T output step 2.
The set temperature information for temperature control in the main control circuit 133 is also changed by the set temperature data T output at step 08. Also, at this time, the BZ flag has been set in the BZ flag set step 256, so when the BZ flag determination step 210 is reached, the determination is YES, and the calculation processing of the BZ timer set step 212 and the buzzer on command step 214 is performed. By executing this, the set temperature is changed and the buzzer 77a generates a buzzer sound. The generation of this buzzer sound continues while the BZ timer TB is counted for a period of 50 msec by an interrupt routine to be described later.

The repetitive operation of the main routine explained above is 50m5ec.
The interrupt routine shown in FIG. 7 is executed at intervals of several hundred microseconds by an internal timer in contrast to the main routine. That is, when the internal timer counts several hundred microseconds, the interrupt start step 300 in FIG. 7 is reached, and the following interrupt calculation process is executed. First, the process proceeds to initial step (41) 302, where the internal timer is stopped, various registers whose contents are changed by interrupt calculation processing are saved, the internal timer is set, and the process proceeds to SW timer flag determination step 304. Then, if the SW timer flag has been reset by the arithmetic processing of the main routine, the determination becomes YES, and the process proceeds to subtraction step 306 to subtract "
1" and update the SW timer determination step 308.
It is determined whether the SW timer Ts has become smaller than 0 or not. At this time, the up switch 82 (96),
Either one of the down switches 83 (97) continues to be pressed, and the arithmetic processing from SW timer judgment step 220 to T output step 246 and return to SW timer judgment step 220 is repeated in the main routine, and the above switch is turned on. After approximately 500m5ec has passed, the determination at SW timer determination step 308 is Y.
ES, the program proceeds to SW timer flag setting step 310, and sets the SW timer flag. Therefore, when this interrupt arithmetic processing is completed and the SW timer flag determination step 220 in the main routine (42) is reached, the determination becomes No.

Then, the SW timer flag determination step 304SW
When the judgment in timer judgment step 308 is No,
Alternatively, after the SW timer flag setting step 310, the process proceeds to a buzzer determination step 312. In this buzzer determination step 312, it is determined whether or not the buzzer is on based on the signal state of the output port for the buzzer command signal. When the buzzer is on, the determination becomes YES and the process proceeds to subtraction step 314, where "1" is set from the BZ timer TB. Subtract and update, B
Proceeding to Z timer determination step 316, it is determined whether BZ timer TB is smaller than O. At this time, in the BZ timer set step 212 in the main routine, the BZ
When approximately 50 m5ec has passed since the timer TB was set, the determination in the BZ timer determination step 316 becomes YES, and the process proceeds to a buzzer off command step 318, where a buzzer off command is issued to stop the buzzer 77a from generating a buzzer sound. This occurs in the oscillation circuit 77b.

Then, when either of the judgments in the buzzer judgment step 312 and the BZ timer judgment step 316 is No, or after the buzzer off command step 318, the process proceeds to the blower switch judgment step 320. Then, the light emitting state of the display 85a is controlled by the calculation processing from the blower switch determination step 320 to the return step 334. That is, when the blower switch 80 is in the open state, the base calculation process is executed from the blower switch determination step 320 to the blank-on command step 332, and the decoder driver 85e
A blank-on command signal is issued to stop the generation of the display drive signal to the display 85a, and the display of the set temperature on the display 85a is stopped. Also, when the blower switch 80 is closed,
When the lighting relay 124 is opened, the advance path from the blower switch judgment step 320 passes through the addition step 322, the number of times judgment step 324, and the number of times reset step 326 to the blank-off command step 328, and the addition step from the blower switch judgment step 320. 32
2. Blank-off command step 328 after passing through the number of times determination step 324 and writing relay determination step 330
In order to issue a blank-off command signal to the decoder driver 85e, the decoder driver 85e generates a display drive signal to the display 85a, and the set temperature on the display 85a is displayed brightly. let

Furthermore, when the blower switch 80 is closed and the lighting relay 124 is closed, the above route (■) is followed from the blower switch determination step 320 to the addition step 322,
The path ◎ that proceeds to the blank-on command step 332 via the number of times determination step 324 and the writing relay determination step 330 is repeated at a ratio of 1:3, and the blank-off command signal and the blank-on command signal are sent to the decoder driver 85e at a ratio of 1:3. Since the temperature is emitted alternately, the light emission of the set temperature display on the display 85a is dimmed. In other words, the light is dimmed at night. Note that the number of times data L is set in a predetermined area of the RAM.

Then, in the return step 334, the saved various registers are returned to the main routine for arithmetic processing (45), the internal timer is started, and the process proceeds to the return step 336, where the main routine that was previously suspended is returned. Return to calculation processing.

The following operations are performed by executing the arithmetic processing of the main routine of FIG. 6 and the interrupt routine of FIG. 7 described above.

(1) When the blower switch 8o is opened, changing of the set temperature and display of the set temperature are stopped.

(2) When the blower switch 8o is closed, the up switch 82 (96) or the down switch 83 (96)
) is pressed, the set temperature will be set between 32°C and 18°C.
Change the temperature by 5℃, buzzer 77a') 50 m s
Generates a buzzer sound during e c.

(3) In contrast to (2) above, up switch 82 (96)
Alternatively, if the down switch 83 (97) is kept pressed, the set temperature will be changed by 0.5°C from 32°C to 18°C every time 500 msec elapses, and the buzzer will sound in response to this change. A buzzer sound is generated from 7a for 50 m5 e c.

(4) Also set when the blower switch 8o is closed (4
6) If the up switch 82 (96) is pressed when the temperature is 32°C, or if the down switch 83 (97) is pressed when the set temperature is 18°C, the set temperature is not changed.

(5) When the lighting relay 124 is closed, the display 8
The light emission of 5a is reduced.

Since the display computer 134 is constantly supplied with a stabilized voltage from the battery 98 via the stabilized power supply circuit 138, it is always in operation regardless of whether the IG Smeach 100 is opened or closed. Sumeichi 10
Since the operation of the main computer 132 is stopped when 0 is opened or closed, the reset signal from the reset circuit 150 is no longer applied to the 5TBY of the display computer 134, and the display computer 134 remains stopped in the current state of arithmetic processing and enters a standby state. ing. That is, the arithmetic processing of the display computer is executed in accordance with the operating state of the main computer 132 as the ■G Smeach 100 is opened and closed.

Next, the configuration and operation of the main control circuit 133 in the computer unit 66 will be explained based on the drawings from FIG. 8 onwards. FIG. 8 shows the internal and peripheral electric circuits of the main control circuit 133.

The mode switches 86 to 94 are connected to the encoder 152 through switch signal input circuits 86b to 94b (parts of which are omitted from the drawings), respectively. The encoder 152 generates a 4-bit parallel binary code signal in response to the signal applied to its input terminal, and supplies it to the input terminal of the main computer 132.

The main computer 132 is MB884 manufactured by Fujitsu Limited.
A type 1 microcomputer is used, and a clock circuit 1
32a is attached. The computer 132 is supplied with power from a constant voltage circuit 138 that is supplied with power from the battery 98 when the G Smeach 100 is turned on, and also receives a reset signal from a reset circuit 150 that responds to the rise of this supply voltage.

Said potentiometer 74a and temperature sensor 68.6
9, 70.72 are analog signal input circuits 74b to 74b, respectively.
The signal is input to the multiplexer 154 via 72b (partially not shown in the drawing). An analog voltage signal indicating the set temperature given from the display computer 135 via the voltage follower 148 is also input to the multiplexer 154.
The multiplexer 154 converts the opening signal of the A/M damper 34 generated by the potentiometer 74b, the internal temperature signal, the outside temperature signal, and the solar radiation signal generated by each temperature sensor, and the set temperature signal according to instructions from the computer 132. Select by.

Ladder resistor circuit 156 produces an analog voltage signal corresponding to the code signal provided from computer 132 via buffer 157.

Comparator 158 compares one input analog signal voltage selected by multiplexer 154 to a reference analog voltage produced by ladder resistance circuit 156 . That is, the ladder resistance circuit 156, the buffer 157, and the comparator 158 have the role of verifying the value of the input analog voltage signal as a digital value (the computer 132 recognizes the input analog voltage as a digital value).

(49) A shift register 160 receives a serial data signal 132b and a corresponding synchronous clock signal 132c from the computer 132 and outputs it as a parallel code to an output terminal. The output parallel code signal is latched in the latch circuit 162 by a latch pulse signal 132d output from the computer 132. The output terminal of the latch circuit 162 is the mode switch lamp 86a.
~94a are connected via drive circuits 86c~94c (partially shown).

Therefore, the main computer 132
Output signals 132b to 132 of 6 a to 94 a
d can generate a command to light any one or more lamps, with computer 132 determining which lamps to light.

The main computer 132 has drive circuits 62a' to 6
2g' (partially not shown), each solenoid valve in the solenoid valve unit 62? 2a to 62g are energized and deenergized to realize the air conditioner operating mode (50) described above. Note that the drive circuits 62a' to 62
Output signals are applied to g' and 107 from the output board 132e with launch of the computer 132.

107 drive circuit is warm up cut relay 1
06. Supply power that can energize the low relay 108. Note that the signal does not indicate whether the second water temperature switch 112 is open or closed, and the signal is sent from the line 66b to the computer 1 via the input amplifier 113.
32.

The main computer 132 has the display control circuit 135
It has a terminal that outputs a signal indicating a buzzer sounding command to the buzzer output circuit.

Next, the control program for the main computer 132 is shown in FIG. 9 and below. The control program is the display computer 1
As in 34, it specifies the operation of the computer itself, and therefore characterizes the operation of the air conditioner as a whole via electric circuits, and is a process that is repeated through trial and error based on Coza manuals, experimental agents, expected specifications, etc. Assemble it,
It is written to the program memory (read-only memory %lJ: Jl?JrROMJ) built into the computer.

FIG. 9 shows an overview of the control program in the main computer 132. The program is roughly divided into a circular chain of the following blocks A to (2).

A; Start routine--Receiving a reset signal from the reset circuit 150 that occurs at the same time as the activation of the main control circuit 133 based on the input of the IG Smeach 100,
Start execution of the control program from the initial address, internal registers, and data memory.

and initialize the input terminals (boats).

B; Analog signal Kugata routine--Multiplexer 15
The five analog voltage signals applied to the input terminals of No. 4 are sequentially verified as digital values, predetermined constant calculations are performed, and the results are stored in a data memory (RAM) as control variables.

C; Forced internal air control routine--Solenoid valve 62c (MVC)
, on/off of the electromagnetic clutch 64 (Mg, e), operation of the FRs switch 87, opening/closing of the water temperature switch 112, state of the internal timer (TiM2), and opening degree of the A/M damper 34 (equivalent to 19014°C) Opening/closing of the outside air intake port 12 and the inside air intake port 14 is determined depending on whether the outside air intake port 12 and the inside air intake port 14 are larger or smaller than the above value.

D; Switch manual reading routine m-mode switch 86
The status of ~94 is input from the encoder 152, and the status flag (flag) is set to "1" in response to the opening/closing of the switch.
O'' is determined, and furthermore, when each switch is turned on for the first time, a command to sound the buzzer 77a is determined.

E; Compressor control routine - When the ECONO switch 88 or A/C switch 89 is operated, the electromagnetic clutch 64 is engaged according to the command.

When the power is turned off and the AUTO switch 90 is operated, the set temperature (
Ts) and the outside temperature (TAM), the actual opening of the A/M damper 34 (Tpo), the actual engagement or deenergization of the electromagnetic clutch 64, and the virtual opening of the A/M damper (Kpo).
-MX) is comprehensively evaluated to decide whether to engage or deenergize the electromagnetic clutch 64.

F; Air outlet control routine--DEF switch 9 (53) 1, vENT switch 92, B/Ly, switch 9
3, or when the HEAT switch 94 is operated,
In order to realize the blowing mode as instructed, the solenoid valve 62a
, 62b, 62e, and 62g are determined, and A
When the UTO switch 9o is operated, the opening degree (Kpo) of the A/M damper 34 and the correction data (Ms) determine the evening airflow, pie level airflow, and vent airflow. Mode lamp 88a to display each blowout mode
~ 94a is lit. Furthermore, the blower switch 8o
is opF rank! 'When IG Smeach 100 is turned on, all mode lamps 88a to 94a are turned off.

G: Intake control routine - Opening/closing of the outside air intake port 12 and the inside air intake port 14 is finally determined based on whether the DEF switch 94a is turned on or off and the forced inside air control routine C is determined. Furthermore, the mode lamps 86a and 87a are determined to be turned on or off in the same manner as in the outlet control routine F.

H; Lamp display routine--determined motor lamp 8
In order to turn on and off the lights 6a to 94a (54), command signals 132b to 132d are output to the shift register 160 and latch circuit 162.

I; Room temperature control routine - Inside air temperature (TR), outside air temperature (TAM), damper opening degree (Kpo), and each correction data for (a) electromagnetic clutch on/off, (b3 solar radiation, (C) outside temperature ( MX, Ms un, MAM), the moving direction of the A/M damper 34 is determined, and the solenoid valve 62c is
, 62d is determined to be ON or OFF.

Details of each of the above-mentioned routines are shown in FIG. 10 and subsequent figures. Next, the features of the program will be explained with reference to these drawings.

FIG. 10 shows an analog signal input routine.

(In al steps 300 to 312, the inside air temperature TR
, outside air temperature TAM, and solar radiation temperature Ts un are data input 1.
Calculated as the average value of 6 times.

(b) Control constant C determined in advance by experiment! ~ According to C5, the following calculation data KR, KAM.

Calculate MAM, Ms u n.

(C) In step 308, outside temperature correction data MA
M is determined as shown in FIG.

(d) In step 312, solar radiation correction data Msu
n is determined as shown in FIG.

+e) In steps 314 to 318, the damper opening degree T
po is input, and based on control constants 06 to c9, correction calculation value T po and calculation data Kpo.

Correction data MX and MS are determined.

tr>In steps 320 to 328, the set temperature Ts
et is input, it is determined whether it is DEF mode (DEF switch flag ON, 0FF), correction data MAM, M
The set temperature Ts is determined with reference to s u n , and 2 is determined as calculation data based on the control constant CIO.

FIG. 13 shows the forced internal air control routine.

The flag determined in step 330 is turned off during initial setting, turned on when the internal air intake mode is determined in step 342, and is turned on in step 337 or step 346.
It is turned OFF.

(b) Steps 332, 334, and 340 are used to detect whether the air conditioning capacity (to the cooling side) is sufficient;
When the capacity is insufficient, the internal air intake mode is set in step 342.

Also, step 34 of determining whether Tim2 (approximately 20 seconds) and the damper opening degree Tpo are within 4°C (calculated gain) on the cooling side.
4, it is determined whether the mode should be set to outside air intake mode.

(In Cl step 336 RFC switch 86 or FR
When the closing operation of the S switch 87 is detected, step 3
42 passes.

+d) If warm-up is detected in step 338 (water temperature switch 112 is closed), step 342 is passed.

FIG. 14 shows the switch manual reading routine.

+a) The on/off inputs of the mode switches 86 to 94 inputted from the encoder 152 in step 350 are temporarily stored in the internal accumulator, and
358,360,362,364°366.370,3
In step 72, it is determined which switch has been operated.

(bl D E F mode (DEF, Sw, flag
.

n), EC0NO, A/C, DEF, F
R3, REC switch input is not acceptable.57) No.

(C1 The judgment result of the above step is YES (sw,
.

n), steps 353a, 357°359, respectively.
．． At 361, 363, 365, 367, 371, and 373, flag on processing is performed. Note that this flag is formed of 8 bits (1 byte), and each bit has +1) → REC switch on or FRS switch off, (2) → AUTO switch on/off, (3) → E
C0NO switch on/off, (4) → A/C switch on/off, (5) → DEF switch on/off, (6
) → VENT switch on/off, (7) → B/L switch on/off, (8) → HEAT switch on/off (1" or "0") are set. This f l
ag corresponds to the operating mode of the air conditioner.

(The details of the dlflag on process are shown in FIG. 15. In step 380, it is checked whether the flag is on or not. If it is off, flag on is executed, and at the same time, in step 384, the buzzer flag B2 is turned on. When the BZ is turned on (58), the buzzer 77a is made to sound until several hundred milliseconds are counted by an interrupt program (not shown) in the same way as the display computer 133, and then the buzzer flag BZ is turned off. .

(When the el AUTO switch is turned on,
In step 353a, in addition to the buzzer processing described in fd), all other eight switch flags are set to O'' (reset=off).

(When the fl AUTO switch is turned on, it is determined in step 353b to open the outside air intake port 14, and in step 353C it is determined to turn on the lamp 90a.

FIG. 16 shows details of the compressor control routine.

ta + Steps 386 to 391, DEF, EC0No
, A/C switch flags are determined, and the corresponding mode lamps 88a, 89a, 90a, 9
4a is turned on or off.

(b) When both the E CON O switch and the A/C switch are turned on, in steps 394 and 396, the temperature is determined according to the lowness of the outside air temperature TAM relative to the set temperature Ts and the damper opening degree Tpo, (Kpo-MX). , the energization of the electromagnetic clutch 64 (step 402) and the operation (step 40).
8) It also determines whether the mode lamps 88a and 89a are turned on or off, and generates a control output signal regarding the clutch 64.

tc) Steps 400a, 400b, and 412 are related to timer processing, and after a certain period of ten seconds has elapsed after the electromagnetic clutch 64 is energized or deenergized, the correction data MX is adopted,
Determine rejection (0).

FIG. 17 shows the outlet control routine. Note that FIG. 17 also includes a lamp display output routine and a mode setting output routine.

(AUTO mode (DEF, VEN
T, B/L, HEAT switch flags are all “0”
'' (off, According to Fig. 18, heater blowout (HEAT), pie level blowout (B/L),
Determine the vent blowout (VENT). That is, steps 444 to 448t' each electromagnetic valve 62a, 62b, 62g
energization (on) and deenergization (off) are determined.

(One of the switch flags regarding the BL blowout mode is 1″
If so, steps 422-426 check this and steps 444, 448-452 accordingly.
1" Determines whether the solenoid valves 62a, 62b, and 62g are energized or deenergized.

(e) Turning on or turning off the mode lamps 91a to 94a is determined in steps 454 to 460.

fd) When the heater blowing mode is determined, step 46
2, apply voltage from the drive circuit 107 to each end of the warm-up relays 196 and 108, and turn on the water temperature switch 11.
0.112 enables the aforementioned warm-up cut and warm-up effect regarding air blowing.

(In steps 466 to 472, the presence or absence of the DEF%-code (switch flag on) (step 466),
The state of the flag indicating whether the REC switch is on (61) or the ERS switch regarding the suction port and the forced internal air flag (explained in FIG. 13) (step 46)
8) and determines whether to energize or de-energize the solenoid valve 62e and to turn on or turn off the mode lamps 86a and 87a.

Tf) In step 474, the command to energize or deenergize the electromagnetic valves 62a to 62g determined in the previous step is issued to the drive circuits 62a' to 62g'.

(g) In step 476, the pre-control (Pre-con) is activated depending on the on/off state of the blower switch 80.
When the blower switch is off (IG smeach is on), all mode lamps 86a to 94a are turned off.

(In hl step 480, the mode lamps 86a to 94a determined previously are turned on.

In order to turn off the light, serial data regarding all the lamps is set in the shift register 160, and a latch signal is applied to the latch circuit 152.

FIG. 19 shows the room temperature control routine.

(62) (According to a control program similar to that disclosed in JP-A-55-47914, energization and deenergization of the solenoid valves 62c and 62d are determined as shown in FIG. 20.

tb) Correction data MX, Ms un, and MAM are included in the calculation.

Although one embodiment of the present invention has been described above, the present invention is not limited to the description of the embodiment, and many modified embodiments can be considered within the scope of the claims.

[Brief explanation of drawings]

The attached drawings show one embodiment of the present invention, and FIG. 1 is an overall configuration diagram, FIG. 2 is a front view of the front seat operation unit, FIG. 3 is a front view of the rear seat operation unit, and FIG. 4 is a front view of the rear seat operation unit. The overall electrical wiring diagram, Figure 5 is the electrical wiring diagram of the display control circuit, Figures 6 and 7 are calculation flowcharts showing the control program of the display computer, and Figure 8 is the electrical wiring diagram of the main control circuit. 9
Figures 10, 13 to 17, and 19
The figure is a calculation flowchart showing the control program of the main computer, Figures 11, 12, 18, and 20 are characteristic diagrams for explaining the operation, and Figure 21 is a functional block diagram showing the configuration of the present invention. be. T-#10...Air conditioning duct, 26.36.38.40.42
...Damper forming an air conditioning functional element, 46.50°52.
54...Diaphragm actuator forming the actuating device, 66...
68. Computer unit serving as electrical control means.
69.70.72...Sensor serving as environmental signal generating means, 76...Operation unit serving as selection signal generating means. Representative Patent Attorney Takashi Okabe (65) 121-

Claims (1)

[Claims] A plurality of air conditioning function elements, an actuating device for actuating a winter air function element and a sound element;
Selection signal generating means for generating a selection signal for selecting whether the operating state of each air conditioning functional element is set fixedly in response to occupant behavior or automatically set in response to environmental conditions; an environmental signal generating means for generating an environmental signal, and responsive to the selection signal generating means, actuating a corresponding actuating device in response to the occupant's behavior when a fixed setting is selected, and when an automatic setting is selected. A car air conditioner control device comprising electric control means for operating all the operating devices in response to an environmental signal from the environmental signal generating means.