JPS6325963B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to a car air conditioner control system called an auto air conditioner, which is capable of controlling the temperature inside a vehicle interior and controlling the blowing direction of air blown toward passengers inside the vehicle interior. Regarding equipment.

[Conventional technology]

In conventional car air conditioners, for example,
As shown in Publication No. 12693, in conjunction with the temperature control of the air blown into the cabin, cold air is blown towards the upper body of the occupant during cooling, and warm air is blown towards the lower body of the occupant during heating. A device that automatically switches the air outlet is known.

[Problem that the invention seeks to solve]

When using the car air conditioner, if the outside temperature is very high in midsummer or conversely in the middle of winter when it is very cold,
As described in the above-mentioned publication, there is no problem with the automatic blow-off switching that blows cold air to the upper body of the occupant and hot air to the lower body of the occupant according to the temperature control of the passenger compartment.

However, during relatively pleasant intermediate seasons such as spring and autumn, the temperature at which the temperature-controlled air is blown out is neither extremely cold nor warm, such as in the middle of winter or midsummer, so it is difficult to Whether the air is blown from above, from below, or bi-level from both the top and bottom directions for cooling the head and feet depends largely on the occupant's preference, and the automatic switching control described above does not necessarily meet the occupant's needs. I can't satisfy you.

In addition, if all of the air outlets are switched only by the passenger's manual operation, the passenger is always required to perform complicated switching operations.
It becomes difficult to use.

[Means for solving problems]

The present invention has been made in view of the above points,
As shown in FIG. 21, there is an air conditioning function unit _M1 that is disposed in a duct that ventilates toward the vehicle interior and supplies a plurality of air-conditioned environments to the vehicle interior, and an environment that affects the air conditioning of the vehicle interior. It includes an environmental signal generating means _M2 that generates an environmental signal corresponding to a condition, and based on the environmental signal, the air conditioning function section
In the car air conditioner control device _{, the air conditioning function section M 1 includes} at least _a first mode, each of which has at least two or more operation modes for changing the air conditioning environment.
and second mode switching means M ₄ , M ₅ , wherein the air conditioning control section M ₃ includes: a first mode specifying switch M ₆ for selecting the operating mode of the first mode switching means M ₄ ; a second mode designating switch _M7 for selecting the operating mode of the second mode switching means _M5 ; and the first and second mode switching means _M4 , _M5.
Based on the environmental signals, both operating modes of
an auto switch M ₈ for selecting switching; and when the auto switch M ₈ is operated, the operating modes of the first and second mode switching means M ₄ and M ₅ are changed based on the environmental signal. and when either the first or second mode designation switch M ₆ or M ₇ is operated, the operation mode of the corresponding mode switching means is set to the operation mode corresponding to the mode designation switch, A technical means is adopted in which the mode control means M ₉ switches the operation mode of the other mode switching means based on the environmental signal.

[Action/effect of the invention]

The operation of the configuration of the present invention shown in FIG. 21 described above will be explained.

According to the air conditioner of the present invention, by switching the operating modes of the first and second mode switching means, a plurality of operating modes of the air conditioner are realized, and a plurality of air conditioned environments are supplied to the vehicle interior. Furthermore, when the auto switch is operated, the operating modes of both the first and second mode switching means are changed by the mode control means based on an environmental signal according to the environmental conditions that affect the air conditioning of the passenger compartment. Automatically switched. As a result, the air conditioning environment in the vehicle interior is automatically switched according to environmental conditions, allowing the occupants to obtain a comfortable air conditioning environment with a few setting operations.

Further, when either the first or second mode designation switch is operated, the mode switching means corresponding to the operated mode designation switch is switched to the operation mode selected by this operation, and the other mode is switched to the operation mode selected by this operation. The switching means is automatically switched based on the environmental signal.

For example, if a certain operation mode of the first mode switching means is selected by the first mode specifying switch, the mode control means switches the first mode switching means to the selected operation mode, while The operation mode of the second mode switching means is
Automatic switching control based on environmental signals.

As a result, the occupant can obtain the desired comfortable air-conditioned environment by simply operating the necessary mode designation switch according to his or her own preferences, special environmental conditions, sudden changes in environmental conditions, etc.

Further, as is clear from the above description, the auto switch of the present invention differs from the conventional auto switch which only automates the switching of the air outlet, in that the auto switch of the present invention has at least two or more different mode switching means. The ability to automate switching between both modes of operation is provided. The mode specifying switch of the present invention is only provided with the function of switching only the operating mode of the corresponding mode switching means to the selected operating mode, and if it is not operated, the mode switching means The mode of operation of the means is automatically switched based on environmental signals by the mode control means.

As is clear from the configuration and operation of the present invention described above, according to the present invention, when a mode designation switch is operated, the request for this operation mode is selected with priority over automatic control based on environmental signals. Therefore, there is an excellent effect that the requirements of the passengers can be fully satisfied.

Moreover, even if a certain (first) mode specifying switch is operated and the operating mode of the mode switching means corresponding to the switch is switched to give priority to automatic control, other unoperated (second) modes Since the operating mode of the mode switching means corresponding to the designated switch is maintained automatically, it is possible to provide a comfortable air-conditioned environment without forcing the occupants to perform many operations, greatly increasing the ease of use as a car air conditioner. An excellent effect can be obtained in that it can be improved.

〔Example〕

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 vehicle compartment, in which an outside air intake port 12 and an inside air intake port 14 are provided in the upstream part of the ventilation path, and a heater outlet 16 and a defroster outlet in the downstream part. 1
8. A vent outlet 20 is provided. The air conditioning duct 10 includes an inside/outside air switching damper (R/F damper) that mutually opens and closes the outside air intake 12 and the inside air intake 14, a ventilation fan 28, a cooler core (evaporator) 30, a heater core 32, and air passing through the heater core. It works in conjunction with an air mix damper (A/M damper) 34 that changes the distribution of air passing through the side passage, a heater blow-off damper (H/T damper) 36 that opens and closes the heater blow-off port 16, and a H/T damper 36. A differential air outlet damper (D/F damper) 38 that opens and closes the differential air outlet 18, a vent outlet damper (V/T damper) that opens and closes the vent air outlet 20 and the differential air outlet 18.
40, and the air mixture chamber 22 (which mixes the air that has passed through the heater core 32 and its side passage in the downstream part of the air conditioning duct) and the air that does not pass through the heater core 32 is passed through the vent outlet 2.
A bilevel blow-out damper (B/L damper) 42 is arranged to open and close the bypass duct 24 for sending the air to the air. The configuration of the air conditioning unit described above is well known.

The blowout modes in this air conditioning unit are 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/
The T damper 22 opens the vent outlet 20, and the B/
The 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) Bi-level blowout (automatic control): H/T damper 36 opens heater outlet 16, V/T damper 40 opens vent outlet 20, B/L damper 42 closes bypass duct 24, and the result is , air is blown out from the vent outlet 20 and the heater outlet 16 toward the center of the vehicle interior, the left and right sides, and toward the passenger's feet.

(3) Bi-level blowout (manual): H/T damper 36
opens the heater outlet 16, and the V/T damper 40
opens the vent outlet 20, and the B/L damper 42
opens the bypass duct 24, and as a result, air is blown out from the vent outlet 20 and the heater outlet 16 toward the center of the vehicle interior, the left and right sides, and toward 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 16 because the air is not heated by the heater core 32 from the bypass duct 24 .

(4) Heater outlet: H/T damper 36 opens heater outlet 16, V/T damper 40 closes vent outlet 20, B/L damper 42 closes bypass duct 24, and H/T damper 36 and The interlocking D/F damper 38 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 passenger's feet, and also from the differential air outlet 18 toward the front. Blows out air (approximately 20% of the heater blowout amount) towards the glass.

(5) Differential outlet: H/T damper 36 closes heater outlet 16 (with some gap), V/T damper 40 closes vent outlet 20, B/L damper 42 closes bypass duct 24, The D/T damper 38 interlocking with the H/T damper 36 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 is a blower fan 2
8, the details of which are described below.

46, 48, 50, 52, 54 are known diaphragm actuators for moving the dampers 26, 34, 36, 40, 42, and a solenoid valve unit 62
Each damper is driven independently according to the air pressure applied through the air piping. These actuators are configured to pull the output end by negative pressure and push it back by a built-in spring. Solenoid valve unit 6
2 are five two-path switching type solenoid valves 62a, 62;
b, 62e, 62f, 62g, and two one-path switching type solenoid valves 62c, 62d. This unit 62 also includes a pipe 63a, a negative pressure tank 63,
An intake pipe negative pressure of an on-vehicle engine (not shown) is supplied through a pipe 63b, and atmospheric pressure is supplied through a pipe 63c, and is applied to the piping of the electromagnetic valves 62a to 62g. 2-path switching type solenoid valves 62a, 62b, 62
e, 62f, and 62g are negative pressure actuators 52 to 58 depending on energization and deenergization by electric energy.
Switch the air pressure applied to either atmospheric pressure or negative pressure. The solenoid valves 62c and 62d separately control the supply and stop of atmospheric pressure and negative pressure.
When energizing circuit c is opened, the air pressure applied to the negative pressure diaphragm 48 gradually approaches atmospheric pressure, and the solenoid valve 62
At the time of energizing open circuit d, the air pressure applied to the negative pressure diaphragm 48 is gradually brought closer to the value of the engine negative pressure.

Reference numeral 56 indicates a known refrigerant compression/expansion type refrigeration unit, which includes a refrigerant compressor (compressor) 56a,
It includes an expansion valve 57 and a cooler core 30. This refrigeration unit has a compressor 56
When the electromagnetic clutch 64 is energized, the compressor 56a is driven by the rotational power from the vehicle engine, thereby coming into operation and cooling the cooler core 30. Although not shown, the surface temperature of the cooler core 30 of the refrigeration system unit 56 is approximately 0°C.
It includes a known mechanism for adjusting the amount of refrigerant circulation so that the amount of refrigerant circulates.

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
It is driven by a solenoid valve 62f in the solenoid valve unit 62.

60 is an electric motor (blower motor) and blower fan 2
8 is rotated to generate forced ventilation in the air conditioning duct 10.

66 is an electrical control device (computer unit)
and a solenoid clutch 64 for actuating each solenoid valve of the solenoid valve unit 62 and the refrigeration system unit 56;
Electrical energy is supplied to the blower electric motor 60 to control the air conditioning inside the vehicle. In order to provide control conditions, two locations in the vehicle interior (front of the vehicle interior: near the instrument panel in front of the passenger seat; rear of the vehicle interior: near the rear tray)
Temperature sensor (interior temperature sensor) 68 installed in
69. A total of four temperature sensors are prepared: a temperature sensor (outside temperature sensor) 70 placed 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. The detected temperature signal is supplied to the electrical 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 (74) that generates an opening signal proportional to the opening of the A/M damper 34.
a: described later), the maximum cooling position detection switch of the A/M damper 34 (74b: described later), and the A/M damper 34
and a speed change switch (75: described later) that determines the amount of air blown in stages in response to the position of (during automatic control).

A front seat operating unit 76 and a rear seat operating unit 78 are connected to the computer unit 66 for instructing the operation of the computer unit 66 by the passenger and for displaying the operating status of the air conditioner to the passenger. 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 in the center of the vehicle instrument panel.
is installed on the back of the front seat backboard (visible from the rear seats).

FIG. 2 shows the arrangement of switches on the surface of the front seat operating 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 electric motor 60 to be set to low, 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 command signals to raise and lower the target temperature (set temperature) for control. A light-emitting numerical display 85a with a total of three digits including one digit after the decimal point is arranged 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 mode switches for commanding the control mode or operation mode of the air conditioner, and each switch generates a signal indicating the next command when pressed.

(1) Shyness switch (RCE switch) 86:R/
The inside air intake port 14 is opened by the F damper 26.

(2) Outside air switch (FRS switch) 87:R/
The outside air intake port 12 is opened by the F damper 26.

(3) Economy switch (ECONO switch) 8
8: 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:
Use the cooling action of the cooler core 30 to adjust the temperature.

(5) Auto switch (AUTO switch) 90:
Control automatically.

(6) Vent blowout command switch (VENT switch)
91: Set to vent blowout mode (described above).

(7) Differential blowout command switch (DEF switch) 9
2: Set to differential blow mode (described above).

(8) Bilevel blowout command switch (B/L switch) 93: Bilevel blowout mode (manual as described above)
Let it be.

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

The switches 82, 83 and 86-94 are of the self-resetting push type, 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 operating unit 78. Front seat operation unit 76
The up and down switches 96 and 9 have the same configuration and function as the up and down switches 82 and 83.
7 is provided.

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 indicates an ignition switch (IG switch) for a gasoline engine. The computer unit 66 is powered directly by line 67a 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 blower motor 60 is grounded via blower resistor 44 and blower switch 80. Further, the blower switch 8 is transmitted from the blower register 44 to the speed change switch 75 in the servo position detection unit 74.
Connected to 0. 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 from the line 66a. When the operating position of the blower switch 80 is Hi, the battery voltage is directly applied to the blower motor 60 without going through the blower resistor 44, and the blower motor 60 is rotated at high speed. In the Me position, the blower motor 60 is powered through three resistors and rotates at medium speed. Lo
In position, the blower motor 60 is powered through five resistors and rotates at low speed.

In addition, the operating position of blower switch 80 is OFF.
At this position, power to the relay coil of blower relay 102 is cut off, so blower relay 102 is deenergized and blower motor 60 stops.

When the blower switch 80 is operated to the AUTO position, the position of the contact point 75a of the speed change switch 75 changes stepwise in accordance with the position of the A/M damper 34, and the A/M damper 34 changes from the intermediate position to fully open and fully open. The number of blower registers is reduced in accordance with the shift to the closed position, and the temperature of the air blown out from the air conditioning duct 10 is automatically related to the air volume.

A starter cutoff relay 104 is energized when the engine key switch is applied to a starter contact (not shown), and forcibly deenergizes the blower relay 102. This stops the blower motor 60 during cranking.

106 and 108 are blower switch 80
Warm-up cut-off relay and warm-up relay, which function when operated in the AUTO position, are connected to line 66 by computer unit 66.
When z is energized, water temperature switch 11
0,112 is energized when closed, opening its relay contacts. The first water temperature sensor 110 closes when the engine coolant temperature is lower than 30°C (therefore, the heating capacity of the heater core 32 is completely insufficient), opens the warm-up cut-off relay 106, and prohibits activation of the heater relay 102. blower motor 60
does not operate. A backflow prevention diode 81a is provided to enable this only in the AUTO position. The second water temperature switch 112 closes when the engine coolant temperature is lower than 50°C (therefore, the heating capacity of the heater core 32 is insufficient), opens the warm-up relay 108, and switches the gear shift switch 75.
automatic speed change control of the blower motor 60 is prohibited, and the rotation speed is fixed at a low speed. Diode 81a makes this possible only in the AUTO position. A signal indicating opening/closing of the second water temperature switch 112 is sent to the computer unit 6 via line 66b.
6 is input.

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

114 is a compressor relay, and 116 is a low-voltage cut switch. The compressor relay 114 is energized by an energizing command ("0" level) from a line 66y from the computer unit 66, and its contacts are closed to close the electromagnetic clutch 64. By energizing the refrigeration unit 56, the refrigeration unit 56 is put into operation. The low pressure cut switch 116 opens when the pressure in the outlet side piping of the cooler core 30 is below a specified level, and deenergizes the electromagnetic clutch 64 to stop the refrigeration unit 56 regardless of the energization command from the computer unit. do. 118 is an electromagnetic device for idle up, compressor 56
a Increase the idle speed of the vehicle engine to capture the power load during driving.

Six of the seven solenoid valves 62a to 62e and 62g in the solenoid valve unit 62 are activated by an activation command (“0” level) from the computer unit 66 via lines 66s to 66x. Forced. Solenoid valve 62 for driving hot water valve 58
f is activated when the maximum cooling position detection switch 74b built in the servo position detection unit 74 is closed (when the A/M damper 34 is near the maximum cooling position).

The relationship between the energization (ON) and deenergization (OFF) of the electromagnetic valves 62a to 62f and the operation of the actuator is shown below.

(1) Solenoid valve 62a-ON-H/ by actuator 50
The heater outlet 16 is opened by the T-damper 36.

OFF - H/T damper 36 by actuator 50
to close the heater outlet 16.

(2) B/ by the solenoid valve 62b-ON-actuator 54
The bypass duct 24 is opened by the L damper 42.

OFF - B/L damper 42 by actuator 54
to close the bypass duct 24.

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

OFF - As long as the solenoid valve 62d is not ON, the actuator 48 maintains the position of the A/M damper 34.

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

OFF - As long as the solenoid valve 62c is not ON, the actuator 48 maintains the position of the A/M damper 34.

(5) Solenoid valve 62e-ON-F/ by actuator 46
The inside air intake port 14 is opened with the R damper 26.

OFF - F/R damper 26 by actuator 46
Open the outside air intake port 12 with .

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

OFF - Open hot water valve 58.

(7) Open the differential air outlet 18 using the solenoid valve 62g-ON-actuator 52.

OFF - Opens vent outlet 20 with actuator 52.

120 is a blower interlocking relay, which is energized when the blower switch 80 is placed in a position other than the OFF position.
Close relay contacts. Note that this blower drive relay 120 responds to the turning on of the blower switch 80 and has nothing to do with stopping the blower motor 60 due to the energization of the start cut relay 104 and the warm up cut relay 106 described above.

The blower interlocking relay 120 has the role of supplying and stopping power to the lamp circuit and sensor motor. Sensor motors SM1 and SM2 rotate a small blower fan, and the blower switch 80
In other words, in response to a request for air conditioning by a passenger, a ventilation environment is created around the inside temperature sensors 68 and 69. The use of motor-driven fans, called aspirators, is known.

By energizing the blower interlock relay 120, battery voltage is applied via the normally closed relay contact of the dimming relay 122 to one end of the lamps 86a to 94a corresponding to the mode switch. lamp 86a
The other end of .about.94a is connected to the computer unit 66, and an arbitrary lamp is lit in response to a lighting command ("0" level) from the computer unit 66.

122 is a dimming relay, and 124 is a lighting relay, which is energized when the lighting switch 126 of the vehicle is turned on (at night). When energized, the dimming relay 122 opens the relay contacts and inserts a limiting resistor 123 into the lamp circuit. For this reason, the lamps 86a~
94a is dimmed compared to before the lighting switch 126 was turned on (during the daytime). The lighting relay 124 closes the relay contact when energized, and includes lamps 82a, 83a, 96a, 97 for illuminating each of the front seat up and down switches 82, 83 and the rear seat up/down switches 96, 97.
Turn on a. At the same time, the diode OR circuit 12
8 and the resistor 130, the lamps 86a to 94a
The computer unit 66 forms a lighting circuit.
All of the lamps 86a to 94a are turned on slightly darker than when the lighting command was given from. The energization of the lighting relay 124, that is, the closing of the lighting switch 126 (that is, generally at night) is input to the computer 66 as a signal level on line 66c.

A lamp 80a connected in parallel with the coil of the lighting relay 124 is provided on the back of the front seat operation unit 76, and the letters drawn on the panel surface (blower switch operation position ``OFF'', ``AUTO'',
``Lo'', ``Me'', ``Hi'') are used to illuminate from the inside.

The mode switches 86 to 94 are all connected to ground at one end, and are used as an operation signal by the computer unit 66 using a "0" level signal generated at the time of push.
is being entered.

Front and rear seat up and down switches 82, 83,
96 and 97 are all connected to ground at one end, and the up switches 82 and 96 are connected to each other, and the down switch 8
The other ends of the 3 and 97 are connected in common, and the "0" level signals generated when pushing in the front or rear seats are collectively input to the computer unit 66 as a signal for the up device or the down device.

The display 8 in the front seat operating unit 76
A digital display unit 85 including 5a is connected to the computer unit 66, and a buzzer 7
7a is connected to the computer unit 66 via an oscillation circuit 77b.

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

The computer unit 66 is a main control circuit 133 that controls the air conditioning function, which will be described in detail later.
(see Fig. 8) and a display control circuit 135 for managing the set temperature (see Fig. 5), each with a main computer 132 and a display computer 1.
It includes a microcomputer designated as 34. The two computers 132 and 134 have predetermined voltage circuits 136 and 138, respectively, and the main computer 1
When the IG switch 32 is turned on, the display computer 134 is constantly supplied with power. The electrical parts that exchange signals with the computer unit mentioned above are connected via appropriate buffers and interfaces.
It is connected to either computer 132 or 134.

Next, regarding display control in the computer unit 66, the electrical wiring diagram in FIG. 5 and FIG.
This will be explained according to the calculation flowchart shown in FIG. First of all, the fifth
In the figure, 76 and 76' are front seat operation units;
Electroacoustic transducer (buzzer) 7 that generates buzzer sound
7a, an oscillation circuit 77b for driving the buzzer 77a to generate a buzzer sound, photocouplers 85b and 85c for optically transmitting clock and data display command signals, and the photocoupler 85.
A shift register 85d stores the display command signal by shifting it 4 bits at a time via the shift register 85d, converts the 3×4 bit signal from the shift register 85d, and receives the latch and blank display command signals for display. A decoder driver 85e that generates a display drive signal for driving, a 7-segment, 3-digit display 85a, and an up switch 8.
2, down switch 83, and blower switch 8
0. Note that the display 85a, photo couplers 85b, 85c, shift register 85a,
The decoder driver 85c constitutes the digital display unit 85 described above. Also, 98 is a battery, 100 is an ignition switch (IG switch), 124 is a lighting relay, 133
is the main control circuit.

135 is a display control circuit, MB8851 manufactured by Fujitsu Limited.
a display computer 134 consisting of a microcomputer; and a reference oscillation circuit 1 that generates a reference oscillation signal of several MHz to the display computer 134.
34a, a constant voltage circuit 138 that supplies a constant voltage to the display computer 134, and a diode 14.
0,141, a capacitor 142, a reset circuit 143 that detects a voltage level change accompanying the constant voltage generation from the constant voltage circuit 138 and generates a reset signal, and a buffer that receives set temperature data from the display computer 134. 144, and a D/A converter 146 that performs digital/analog (D/A) conversion of the signal from this buffer 144. The analog signal from this D/A converter 146 is applied to the analog input of the main control circuit 133 via a voltage follower 148.
Further, the start of 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 receives a constant voltage supply from the constant voltage circuit 138 and a reset signal from the reset circuit 143 at the Vcc terminal and the reset terminal, and enters the operating state, and switches on the lighting relay 124, up switch 82, down switch 83, and blower. The 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 operating unit 78 (not shown in FIG. 5) output switch signals based on their closed states. In response, it executes various arithmetic processing for display control and generates display command signals (latch, blank, clock, and data signals) to the shift register 85d and decoder driver 85e to display the set temperature on the display 85a. , generates a buzzer on/off command signal to the oscillation circuit 77b for controlling the generation of a buzzer sound from the buzzer 77a, and generates set temperature data to the buffer 144 for transmitting set temperature information to the main computer 132. . In addition, this display computer 134 receives a signal from a reset circuit 150 at a standby (STBY) terminal, and when a reset signal is generated from the reset circuit 150 in conjunction with the operation of the main computer 132, the display computer 134 normalizes the arithmetic processing. When the operation of the main computer 132 stops and the reset signal is no longer generated, the main computer 132 stops in a standby state in the middle of the arithmetic processing. In addition,
134b is a port with a latch 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 with reference to the calculation flowcharts shown in FIGS. 6 and 7. This FIG. 6 is a calculation flowchart showing the calculation processing of the main routine of the display computer 134.
The figure 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 to the Vcc terminal via the stabilized power supply circuit 138, 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 computer 134 becomes operational. Then, from this state, when the IG switch 100 is closed and the reset circuit 150 detects that the main computer 132 is in the operating state and applies a reset signal to the STBY terminal of the display computer 134,
The display computer 134 starts its arithmetic processing at start step 200 in FIG. and,
Proceed to initial setting step 202, clear the contents of various data areas in RAM to 0, which will be described later.
Set the set temperature data T to a value equivalent to 25℃,
An internal timer is set and started, and the program then proceeds to the main routine's repeated operations.

Then, at the beginning of the repeated calculations of this main routine, the process proceeds to display temperature calculation step 204, where the set temperature data T is converted to 10 ¹ for digital display of 3 digits (10 ¹ , 10 ⁰ , 10 ^-1 ) on the display 85a. , 10 ⁰ , 10 ^{- 1} digit display temperature data is stored in a predetermined area of RAM, and the process proceeds to display temperature output step 206 where the displayed temperature data is converted to 10 ^{1 digits} .
The photocoupler 85b, 8 sequentially synchronizes with the clock signal from digit data to ^10-1 digit data.
5c to the shift register 85d and finally the latch signal to the decoder driver 85.
The process proceeds to the T output step 208, where the set temperature data T is latched at the latch port 134b and generated at the buffer 144. As a result, the display temperature 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 converted into an analog signal by the D/A converter 146, and is inputted to the analog input of the main control circuit 133 via the voltage follower 148, and the set temperature data for temperature control. Used as information.

Then, proceed to BZ flag determination step 210.
It is determined whether or not the BZ flag is set in a predetermined area of the RAM, and if the BZ flag is set by changing the set temperature data T, which will be described later, the determination becomes YES and the process advances to BZ timer set step 212. A BZ timer TB of approximately 50 msec 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 to the oscillation circuit 77b, causing the buzzer 77a to generate a buzzer sound. However, if the BZ flag has been reset and the determination in the BZ flag determination step 210 becomes NO, the program proceeds to the SW timer set step 216 without passing through the BZ timer set step 212 and the buzzer-on command step 214. Then, in this SW timer set step 216, the SW timer Ts of approximately 50 msec is set.
The SW timer flag is set in a predetermined area of RAM, and the program proceeds to step 218 to set the SW timer flag.
Reset the SW timer flag.

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 has been set, the determination will be NO, but if it has been reset, the determination will be NO. When the result is YES, the process proceeds to blower switch determination step 222. 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 state, that is, the vehicle interior is not being air-conditioned. In this case, the judgment 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.
When the blower switch 80 is closed, the determination in the blower switch determination step 222 becomes YES, and the process proceeds to the switch data input step 224, where the up switches 82, 96, down switches 83,
The signal state from 97 is 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) (S×So), and it is determined whether the value is 0 or not. , 96 or down switches 83, 97 are continuously turned on and the old switch data So and switch data S have the value of up data Su or down data _SD , the judgment will be NO, but under the above conditions In other cases, the multiplication value S×So becomes 0 and the determination becomes YES.

If the determination in the switch status determination step 228 is YES, the program proceeds to the SW timer flag setting step 230 and sets the SW timer flag.
The process advances to an up switch determination step 232, where it is determined whether the switch data S is the up data Su. At this time, if the switch data S is the up data Su, the determination becomes YES, and the process proceeds to the up data set step 234, where the old switch data S is set as the up data Su. However, if the switch data S is not the up data Su. The judgment becomes NO, and the down switch judgment step 236
Proceed to. Then, in this down switch _{determination step 236, it is determined whether or not the switch data S is down data SD .} The switch data S is set to the down data S _D , but when the switch data S is not the down data S _D , the judgment becomes NO.
Proceed to data reset step 240 and reset to the old switch data So. Then, after the up 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 buzzer flag reset step 242 is performed.
Proceed to.

On the other hand, when the judgment in the switch state judgment step 228 is NO, that is, the up switches 82, 9
6 or when the down switches 83 and 97 continue to be turned on, the process advances to display temperature calculation step 242, display temperature output step 244, and T output step 246.
The same arithmetic processing as in steps 204, 206, and 208 described above is executed, and the SW timer flag determination step is executed.
Return to 220.

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

If the blower switch 80 is in the closed state and neither the up switches 82, 96 nor the down switches 83, 97 are pressed, or if they are both pressed at the same time, step 220 → 222 → 224 → 228 → 230 → 232 →
236→240 When the blower switch 80 is closed and the top switches 82 and 96 are newly turned on, the steps 220→222→224→228→230→232→
234 When the blower switch 80 is closed and the down switches 83 and 97 are newly turned on, steps 220→222→224→228→230→232→
236→238 If the blower switch 80 is closed and the up switches 82, 96 and down switches 83, 97 are kept on, the steps 220→222→224→228→242→244→
246→220 When blower switch 80 is open, step 220→222→226→228→230→232→
236→240 Note that even if the SW timer flag is set in the SW timer flag set step 230, it will be reset when the SW timer flag reset step 218 is reached, so the determination in the SW timer flag determination step 220 will be YES. . If the determination in the SW timer flag determination step 220 is NO, this is the case where the SW timer flag is set by counting the SW timer Ts for a period of 500 msec using an interrupt routine to be described later.

Following the above arithmetic processing, the process proceeds to a BZ flag reset step 248 to reset the BZ flag, and proceeds to an up switch determination step 250 to determine whether or not the old switch data So is the up data Su. If the old switch data So is the up data Su, the determination becomes YES, and the process proceeds to upper limit determination step 252, where it is determined whether the set temperature data T is a value corresponding to 32°C, which is the upper limit of the set temperature. judge. Then, when the set value 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"("15 of the set temperature data T is 0.5 degrees"). The BZ flag is set in order to generate a buzzer sound from the buzzer 77a at BZ flag setting step 256.
The value corresponding to 32℃ and the condition determination step described above.
If the determination in step 252 is YES, 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 down switch judgment step is carried out.
Proceed to 258 and the old switch data So is down data
Determine whether it is _SD . And the old switch data So is down data _SD and its judgment is
If 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 18° C., which is the lower limit of the set temperature. At this time, if the set temperature data T is larger than the value corresponding to 18°C, the determination is NO, and the process proceeds to subtraction step 262, where "1" is subtracted from the set temperature data T and updated.
Proceed to flag set step 256.

Also, when only one of the up switches 82, 96 and the down switches 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
When the value corresponds to 18° C. and the lower limit determination spring 260 makes a determination of YES, the set temperature data T is not changed and the buzzer flag is set, and the process returns to the display temperature calculation step 204.

If the set temperature data T is changed in addition step 254 or subtraction step 262,
In the display temperature calculation step 204, the display temperature data is converted according to the set temperature data T. Therefore, the digital display on the display 85a is updated by 0.5°C by the displayed temperature data output at the display temperature output step 206, and the temperature in the main control circuit 133 is updated by the set temperature data T output at the T output step 208. Temperature setting information for control is also changed. 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.
By executing the arithmetic processing in the BZ timer set step 212 and the buzzer on command step 214, the buzzer 77a is activated while changing the set temperature.
Generate more buzzer sound. This buzzer sound is generated by setting the BZ timer TB to 50 by the interrupt routine described later.
This continues while counting is processed for a time of msec.

The repeated operation of the main routine explained above is 50m.
The interrupt routine shown in FIG. 7 is executed at intervals of about several hundred microseconds by an internal timer in response to the main routine. That is, when the internal timer counts several hundreds of microseconds, the interrupt start step 300 in FIG. 7 is reached, and the following interrupt calculation process is executed. First, proceed to initial step 302,
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, by the calculation processing of the main routine,
If the SW timer flag has been reset, the determination becomes YES, and the process proceeds to subtraction step 306 to reset the SW timer flag.
The timer Ts is updated by subtracting "1", and the process proceeds to SW timer determination step 308, where it is determined whether the SW timer Ts has become smaller than 0 or not. At this time, up switches 82, 96, down switches 83,
97 continues to be pressed, the arithmetic processing is repeated in the main routine from SW timer flag determination step 220 to T output step 246 and back to SW timer flag determination step 220.
When approximately 50 msec has passed since the above switch was turned on, this SW timer judgment step 308
The determination becomes YES, and the process advances to SW timer flag setting step 310 to set the SW timer flag. Therefore, after this interrupt calculation process is completed, the SW timer flag determination step in the main routine is started.
When it reaches 220, the judgment becomes NO.

Then, the SW timer flag determination step
304SW Timer judgment step 308 judgment is either
If NO, or after SW timer flag setting step 310, the process advances to 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, and the determination is made when the buzzer is on.
When the result is YES, proceed to subtraction step 314 and start the BZ timer.
TB is updated by subtracting "1" from it, and the process proceeds to BZ timer determination step 316, where it is determined whether the BZ timer TB is smaller than 0 or not. At this time, when approximately 50 msec has passed since the BZ timer TB was set in the BZ timer set step 212 in the main routine, the BZ timer determination step 316 is started.
The judgment becomes YES, and the buzzer off command step is executed.
Proceeding to step 318, a buzzer off command is issued to the oscillation circuit 77b to stop the buzzer 77a from generating a buzzer sound.

Then, when the judgment in either the buzzer judgment step 312 or the BZ timer judgment step 316 is NO, or after the buzzer off command step 318, the process advances to the blower switch judgment step 320. Then, from this blower switch judgment step 320, a return step 334 is performed.
The light emitting state of the display 85a is controlled by the calculation processing up to the step . That is, when the blower switch 80 is in the open state, the blower switch determination step is performed.
From 320, the process proceeds to blank-on command step 332, where arithmetic processing is executed, and a blank-on command signal is issued to the decoder driver 85e to stop the generation of the display drive signal to the display 85a, and to stop displaying the set temperature on the display 85a. . Further, when the blower switch 80 is closed and the lighting relay 124 is opened, a path proceeds from the blower switch determination step 320 to the blank-off command step 328 via the addition step 322, the number of times determination step 324, and the number of times reset step 326; From blower switch judgment step 320 to addition step 322, number of times judgment step
324, the path of proceeding to the blank-off command step 328 via the writing relay determination step 330 is repeated at a ratio of 1:3, and the decoder driver 85
In order to issue a blank-off command signal to the display 85a, the decoder driver 85e generates a display drive signal to the display 85a to brightly display the set temperature on the display 85a. Also, when the blower switch 80 is closed,
When the lighting relay 124 is closed, the above path and the path from the blower switch determination step 320 to the addition step 322, the number of times determination step 324, and the lighting relay determination step 332 are repeated at a ratio of 1:3, and the decoder driver 8
In order to issue a blank-off command signal and a blank-on command signal alternately at a ratio of 1:3 at 5e, the light emission of the set temperature display on the display 85a is dimmed. In other words, dimming the light at night. In addition, the number of times data L is RAM
is set in a predetermined area.

Then, in return step 334, the various registers that have been saved are returned to the main routine for arithmetic processing, an internal timer is started, and the process proceeds to return step 336, where the main routine arithmetic processing that was previously suspended is performed. to return to.

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 80 is opened, changing of the set temperature and display of the set temperature are stopped.

(2) When the blower switch 80 is closed, if the up switch 82, 96 or the down switch 83, 97 is pressed, the set temperature is changed by 0.5°C between 32°C and 18°C, and the buzzer 77a is activated.
Generates a buzzer sound for 50msec.

(3) Regarding (2) above, if the up switches 82, 96 or down switches 83, 97 are kept pressed, the temperature will rise from 32°C every 500 msec.
Change the set temperature in 0.5℃ increments between 18℃ and increase the buzzer sound from buzzer 77a for 50m due to this change.
Generate for sec.

(4) Even when the blower switch 80 is closed, if the up switches 82, 96 are pressed when the set temperature is 32°C, or if the down switches 83, 97 are pressed when the set temperature is 18°C, ,
Do not change the set temperature.

(5) When the lighting relay 124 is closed, the light emitted from the display 85a is dimmed.

Note that since the display computer 134 is constantly supplied with a stabilized voltage from the battery 98 via the stabilized power supply circuit 138, the IG switch 1
Although it is always in operation regardless of whether the IG switch 100 is opened or closed, since the main computer 132 stops operating when the IG switch 100 is opened or closed, the reset signal from the reset circuit 150 is no longer applied to STBY of the display computer 134. The display computer 134 is in a standby state while being stopped in the state of arithmetic processing at that time. That is, the arithmetic processing of the display computer is executed in accordance with the operating state of the main computer 132 as the IG switch 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 86-94 are connected to the encoder 152 via switch signal input circuits 86b-94b (parts of the drawings are omitted), respectively. The encoder 152 generates a 4-bit parallel binary code signal in response to the signal applied to the input terminal,
It is applied to the input terminal of the main computer 132.

The main computer 132 is manufactured by Fujitsu Limited.
An MB8841 type microcomputer is used and a clock circuit 132a 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 IG switch 100 is turned on, and receives a reset signal from a reset circuit 150 that responds to the rise of this supply voltage.

The potentiometer 74a and the temperature sensors 68, 69, 70, and 72 are input to the multiplexer 154 through analog signal input circuits 74b to 72b (parts of which are omitted from the drawings), respectively. The multiplexer 154 includes the display computer 13
The multiplexer 154 also receives an analog voltage signal indicating the set temperature, which is given from 5 through the voltage follower 148, and the multiplexer 154 receives the opening signal of the A/M damper 34 generated by the potentiometer 74b, and the internal temperature signal generated by each temperature sensor. , the outside temperature signal, the solar radiation signal, and the set temperature signal, the computer 13
Select according to the second command.

Ladder resistor circuit 156 generates an analog voltage signal corresponding to the code signal applied 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 . In other words, the ladder resistance circuit 156 and the buffer 1
57 and the comparator 158 have the role of detecting the value of the input analog voltage signal as a digital value (the computer 132 recognizes the input analog voltage as a digital value).

160 is a shift register, and the computer 13
2 receives a serial data signal 132b and a corresponding synchronous clock signal 132c and outputs it as a parallel code to an output terminal. The output parallel code signal is passed through the latch circuit 162.
It is latched 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 through respective drive circuits 86c to 94c (not shown).

Therefore, the main computer 132 outputs the output signals 132b to 13 of the lamps 86a to 94a.
2d can generate a command to light any one or more lamps, with computer 132 determining which lamp to light.

The main computer 132 is a drive circuit 62
The solenoid valves 72a to 62 in the solenoid valve unit 62 are
g is energized and deenergized to realize the operation mode of the air conditioner described above. In addition, the drive circuits 62a' to 62
An output signal is applied to g' and 107 from a latched output port 132e of the computer 132.

A drive circuit 107 supplies power that can energize the warm up cut relay 106 and the low relay 108. Note that the second water temperature switch 112
A signal indicating opening/closing of the input amplifier 21 is sent from the line 66b.
3 to the computer 132.

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

Next, the control program for the main computer 132 is shown in FIG. 9 and below. As in the case of the display computer 314, the control program defines the operation of the computer itself, and therefore characterizes the operation of the air conditioner as a whole through the electric circuit.
It is assembled through trial and error based on the user's animal, experimental rules, expected specifications, etc., and written into the computer's built-in program memory (read-only memory, commonly known as ``ROM'').

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

A: Start routine - In response to the 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 turning on of the IG switch 100, execution of the control program is started from the initial address, and the built-in registers and data are Perform initial settings for memory and input terminals (ports).

B: Analog signal input routine - The five analog voltage signals applied to the input terminals of the multiplexer 154 are sequentially verified as digital values, predetermined constant calculations are performed, and the results are stored in the data memory (RAM) as control variables.

C: Forced internal air control routine - solenoid valve 62c
(MVC) on/off, electromagnetic clutch 64
(Mg, C) on/off, 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 (Tpo, larger or smaller than the value equivalent to 4°C) mosquito)
Opening/closing of the outside air intake port 12 and the inside air intake port 14 is determined accordingly.

D: Switch input reading routine - The status of the mode switches 86 to 94 is input from the encoder 152, and status flags (flag) are determined to be ``1'' or ``0'' in response to the opening and closing of the switches. Buzzer 77 when it is the second injection
Determine the ringing command for a.

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 difference between the set temperature (Ts) and the outside temperature (TAM), A/
The actual opening degree (Tpo) of the M damper 34, the actual engagement/deenergization of the electromagnetic clutch 64, and the virtual opening degree (Kpo-MX) of the A/M damper are comprehensively evaluated to determine the engagement of the electromagnetic clutch 64. , determine the deactivation.

F: Air outlet control routine-DEF switch 92,
VENT switch 91, B/L switch 93,
Or, if the HEAT switch 94 is operated, in order to realize the blowing mode according to the command,
Solenoid valves 62a, 62b, 62e, 62g
When ON or OFF is determined and the AUTO switch 90 is operated, heater blowout, bilevel blowout, and vent blowout are determined based on the opening degree (Kpo) and correction data (Ms) of the A/M damper 34. . In order to display each blowout mode, mode lamps 88a to 94a are turned on. Furthermore, when blower switch 80 is in the OFF position, IG switch 1
When 00 is input, mode lamps 88a to 94a
Turn off all lights.

G: Suction port control routine-DEF switch 92a
On/off and forced air control routine C
Based on this determination, the opening and closing of the outside air intake port 12 and the inside air intake port 14 is finally determined. Further, 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 - In order to turn on and off the determined mode lamps 86a to 94a, a shift register 160 and a latch circuit 162 are used.
Command signals 132b to 132d are output to the terminals.

I: Room temperature control routine - inside air temperature (TR), outside air temperature (TAM), damper opening degree (Kpo), and (a)
The direction of movement of the A/M damper 34 is determined according to each correction data (MX, Msun, MAM) of on/off of the electromagnetic clutch, (b) solar radiation amount, and (c) outside temperature, and the electromagnetic valves 62c, 62d are Decide whether to turn it 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.

(a) In steps 505 to 512, the inside air temperature TR,
Data input is outside air temperature TAM and solar radiation temperature Tsun.
Calculated as the average value of 16 times.

(b) According to the control constants C ₁ to _{C 5} determined in advance in experiments, the following calculated data KR,
Calculate KAM, MAM, Msun.

(c) In step 509, outside temperature correction data
MAM is determined as shown in FIG.

(d) In step 512, solar radiation correction data
Msun is determined as shown in FIG.

(e) In steps 514 to 518, damper opening Tpo
is input, and based on the control constants C ₆ to _{C 9} , the correction calculation value Tpo, the calculated data Kpo, and the correction data are
MX and MS are determined.

(f) In steps 520 to 528, the set temperature Tset is input, and the correction data MAM,
The set temperature Ts is determined with reference to Msun, and the calculated data _K2 is determined based on the control constant _C10 .

FIG. 13 shows the forced internal air control routine.

(a) The flag determined in step 530 is turned OFF during initial setting, turned ON when the internal air intake mode is determined in step 542, and turned OFF in step 537 or step 546.

(b) Steps 532, 534, and 540 are used to detect whether the air conditioning capacity (to the cooling side) is sufficient, and when the capacity is insufficient, step 542 sets the mode to internal air intake mode. In addition, in step 544, it is determined whether or not Tim2 (approximately 20 seconds) and the damper opening degree Tpo are within 4° C. (calculated gain) on the cooling side, to determine whether or not the outside air intake mode should be selected.

(c) At step 536, set REC switch 86 or FRS.
If the closing operation of switch 87 is detected, step 542 passes.

(d) If warm-up is detected in step 538 (water temperature switch 112 is closed), step 538 is detected.
542 passes.

FIG. 14 shows the switch input 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 the on/off inputs of the mode switches 86 to 94 are inputted from the encoder 152 in step 350, and are stored in the internal accumulator.
In nine steps 370 and 372, it is determined which switch was operated.

(b) When in DEF mode (DEF.sw, flag on), ECONO, A/C, DEF, FRS,
REC switch input is not accepted.

(c) If the judgment result of the above step is YES (sw, on), steps 353a, 357, 359, 361,
363, 365, 367, 371, and 373 perform flag on processing. Note that this flag is formed of 8 bits (1 byte), and each bit indicates whether (1) → REC switch on or FRS switch off, or (2) → AUTO.
Switch on/off, (3)→ECONO switch on/off, (4)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”). is set. This flag
corresponds to the operating mode of the air conditioner.

(d) Details of flag on processing are shown in FIG. Check whether the flag is on in step 380,
When flag is off, at the same time as flag on is executed, the buzzer flag BZ is turned on in step 384. When the buzzer flag BZ is turned on, display computer 1
33, the buzzer 77a is activated until several hundred milliseconds are counted by an interrupt program (not shown).
After sounding, turn off the buzzer flag BZ.

(e) When the AUTO switch is turned on, in step 353a, in addition to the buzzer processing described in (d), all other eight switch flags are set to "0" (reset = off). .

(f) When the 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.

(a) In steps 386-391, DEF, ECONO, A/
Each switch flag of C is determined, and whether the corresponding mode lamps 88a, 89a, 90a, and 94a are turned on or off is determined.

(b) When both the ECONO switch and the A/C switch are turned on, in steps 394 and 396, the electromagnetic clutch is activated depending on the lowness of the outside temperature TAM relative to the set temperature Ts and the damper opening Tpo, (Kpo−MX). 64 activation (step 402) and deactivation (step 408), and mode lamps 88a, 89
A is turned on or off, and a control output signal is generated for the clutch 64.

(c) 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 is
Decide whether to adopt MX or not (0).

FIG. 17 shows the outlet control routine. In addition,
FIG. 17 also includes a lamp display output routine and a mode setting output routine.

(a) AUTO mode (DEF,
When the VENT, B/L, and HEAT switch flags are all “0” (off)) is the step.
When detected in step 420, in steps 428 to 442, according to the opening degree (Kpo) of the A/M damper, correction data (Ms), and predetermined values T ₁ to T ₄ , the steps shown in FIG. 18 are performed. Determine heater blowout (HEAT), bilevel blowout (B/L), and vent blowout (VENT). That is, in steps 444 to 448, each solenoid valve 62a, 62b, 62
Determine whether g is energized (on) or deenergized (off).

(b) If one of the switch flags related to the blowout mode is set to "1", this is checked in steps 422 to 426, and the steps are performed accordingly.
444, 448 to 452 are solenoid valves 62a, 62b, 62
Determine whether g is energized or deenergized.

(c) It is determined in steps 454 to 460 whether mode lamps 91a to 94a are to be turned on or off.

(d) When the heater blow mode is selected, step
At 462, a voltage is applied from the drive circuit 107 to each end of the warm-up relays 196, 108, and the water temperature switches 110, 112 enable the warm-up and warm-up actions related to the air blowing described above.

(e) In steps 466 to 472, presence or absence of DEF mode (switch flag on) (step 466)
Is the REC switch for the inlet turned on?
The flag indicating whether the ERS switch is on or not and the state of the forced internal air flag (explained in FIG. 13) are checked (step 468), and the solenoid valve 62e is turned on.
The mode lamps 86a and 87a are turned on and off.

(f) In step 474, the command to energize or deenergize the solenoid valves 62a to 62g determined in the previous step is output to the drive circuits 62a' to 62g'.

(g) In step 476, the pre-control (Pre-
When the blower switch is off (the IG switch is on), all mode lamps 86a to 94a are turned off.

(h) In step 480, the previously determined mode lamps 86a to 94a are turned on;
In order to turn off the lights, serial data regarding all the lamps is set in the shift register 160, and a latch signal is applied to the latch circuit 162.

FIG. 19 shows the room temperature control routine.

(a) In accordance with a control program similar to that disclosed in Japanese Unexamined Patent Publication No. 55-47914, energization or deenergization of the solenoid valves 62c and 62d is determined as shown in FIG.

(b) Calculation includes correction data MX, Msun, and MAM.

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 operating unit, FIG. 3 is a front view of the rear seat operating unit, and FIG. 4 is a front view of the rear seat operating 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. Figures 9, 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.
The figure is a functional block diagram showing the configuration of the present invention. 10... Air conditioning duct, 26, 36, 38, 4
0, 42...damper, 46, 50, 52, 54...
...Diaphragm actuator, 66...Computer unit, 68, 69, 70, 72...Sensor, 7
6...Operation unit.

Claims (1)

[Scope of Claims] 1. An air conditioning function unit that is disposed in a duct that ventilates toward the vehicle interior and supplies a plurality of air-conditioned environments to the vehicle interior, and that corresponds to environmental conditions that affect the air conditioning of the vehicle interior. and an air conditioning control section that controls the air conditioning function section based on the environmental signal, the air conditioning function section controlling the air conditioning environment. The air conditioning control section includes at least first and second mode switching means each having at least two or more operating modes to be changed, and the air conditioning control section includes: a first mode switching means for selecting an operating mode of the first mode switching means; a second mode specifying switch for selecting the operating mode of the second mode switching means; and a second mode specifying switch for selecting the operating mode of the first and second mode switching means based on the environmental signal. an auto switch for selecting the switching means; when the auto switch is operated, the operating mode of the first and second mode switching means is switched based on the environmental signal; When either one of the second mode specifying switches is operated, the operating mode of the corresponding mode switching means is set to the operating mode corresponding to the mode specifying switch, and the operating mode of the other mode switching means is changed to the operating mode according to the environment. A car air conditioner control device comprising: mode control means that switches based on a signal; 2. The car air conditioner control device according to claim 1, wherein the first mode switching means is an inside/outside air switching device that selects at least either an outside air introduction mode or an inside air circulation mode. 3. Claim 2, wherein the second mode switching means is an air outlet switching device that selects an air outlet for supplying conditioned air into the vehicle interior.
The car air conditioner control device described in Section 1.