JPS6028687B2 - Vehicle air conditioning control device - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a ventilation duct for supplying air toward a vehicle interior, a blower motor that generates an air flow toward the vehicle interior in this ventilation duct, and a blower motor that generates an air flow toward the vehicle interior. A vehicle air conditioner comprising a heat exchange means disposed in a cooler and a heater, the cooling effect of the cooler and the heating effect of the heater being adjustable, the air conditioner further comprising one or more air conditioners. The present invention relates to a vehicle air conditioner equipped with an operating member for switching the conditioning mode, which automatically controls the temperature of the blown air and also automatically controls the operating member for switching the air conditioning mode.

[Background technology]

Vehicle air conditioning control devices that have both temperature control and mode control are known.

First, regarding temperature control devices, temperature control devices that use analog signal processing circuits have been put into practical use.
This device uses multiple heat-sensitive resistance elements to detect various control parameters such as temperature control conditions, such as inside air temperature and outside air temperature. By connecting these resistance elements in series and supplying power, each resistance It is configured to take out a composite value of voltage drops occurring in the elements, and use this composite voltage to represent the amount of adjustment of the temperature regulating member of the air conditioner.

However, in the conventional device described above, the current flowing through each resistance element changes depending on the combined resistance value of multiple heat-sensitive resistance elements, so even if one control parameter, such as the inside air temperature, is to be detected, it is difficult to detect the outside air temperature, etc. For example, the detection value differs for the same amount of change in the inside air temperature, and as a result, the temperature adjustment amount for the amount of change in the inside air temperature changes depending on other control parameters such as the outside air temperature. Mode control refers to internal/external air switching, which selects the air taken into the ventilation duct from inside or outside the vehicle, switching on/off of the cooler, and blowout switching, which selects the direction of air blowing from the ventilation duct to the passenger compartment. , these mode controls are preferably associated with temperature control.

In known examples, the mode control is usually realized by mechanically or electrically coupling the mode switching section and the temperature control member.

In this case, there is a problem in that the amount of temperature adjustment is not accurately determined in the temperature control described above, and therefore the mode switching for movement cannot be appropriately performed.

[Purpose of the invention]

In view of the above-mentioned points, the present invention has no interference between control parameters, so temperature control can be performed accurately according to a plurality of control parameters, and interference between control parameters does not affect mode control. It is an object of the present invention to provide a vehicle air conditioning control device that achieves the following.

[Summary of the structure of the invention]

In order to achieve the above object, the present invention has the features shown in FIG. 17.

That is, the vehicle air conditioning control device of the present invention includes a ventilation duct 10 for supplying air toward the vehicle interior, a blower motor 14 that generates an air flow toward the vehicle interior through the ventilation duct, and the ventilation duct 10. The cooler 15 is placed in
and a heater 16, the cooling effect of the cooler 15 and the heating effect of the heater 16 can be adjusted. In a vehicle air conditioner equipped with actuating members 13, 21, and 50 for switching modes, a first
a second signal generating means 61 for generating a second signal corresponding to the temperature of the air outside the vehicle; and a third signal generating means 61 for generating a third signal for changing the control target temperature of the air temperature inside the vehicle. a signal generating means 63; a memory means MM for repeatedly inputting and storing the first to third signals from the first and third signal generating means; a first processing means M1 that repeatedly generates an adjustment signal indicating an adjustment amount for adjusting the cooling effect and heating effect in the heat exchange means HEX; 13,21
, 50 for generating a switching signal for switching operation.
and the heat exchange means HEX and the actuating members 13, 21, 50 in response to adjustment signals from the first processing means MI and switching signals from the second processing means M2, respectively. The invention is characterized in that it includes an actuating means OM for actuating the actuating device.

In the embodiment described below, the storage means A side, the first processing means M1, and the second processing means M2 are configured to repeat various arithmetic processing in time series according to a program read out sequentially from a memory ROM. A so-called microcomputer is used.

A temporary memory RAM built into the microcomputer is used as the storage means.

In the embodiment of the present invention, the first processing means MI combines each gain-applied signal with a gain-applying means GM that individually applies each of the first to third signals from the storage means MM. and a synthesizing means CM for generating an adjustment signal indicating the amount of adjustment of the heat exchange means HEX.

The second processing means M2 operates the inside/outside air switching damper 13, the first determination means ml for selectively switching between the outside air intake mode and the inside air intake mode, and the cooler 15.
It includes a second determining means m2 for energizing/deenergizing the cooling mechanism 22 to be stopped, and a third determining means m3 for selectively switching the blow-off switching damper 21 between an upper blow-off mode and a lower blow-off mode. .

〔Effect of the invention〕

By using the storage means MM of the present invention, in addition to temperature control in which the amount of temperature adjustment is determined based on various input control parameters, it is also possible to perform mode control using the same control parameters.

One control parameter can be used not only for one mode control but also for multiple mode control, and the present invention is more advantageous as the number of mode controls increases.

[Embodiments] The present invention will be described below with reference to embodiments shown in the accompanying drawings.

This embodiment relates to an air conditioning control device for an automobile, and is a known air conditioner using a cold air/warm air mixing method, in which air supplied upstream of a temperature control member is connected to a heater and its bypass passage. In an air conditioner, the temperature of the downstream mixed air blown into the target space is adjusted according to the distribution ratio. It is configured to control according to the processing order. In FIG. 1 showing the entire system, a ventilation duct 10
On the upstream side of the , there are an inside air introduction row 1 for circulating inside air (indoor air) through the interior of the car as an air inlet (intake port), and an outside air introduction row 2 for taking in outside air (indoor atmosphere). are formed, and one of both inlets is closed by a damper 13.

The selection of the inlets 11 and 12 by the damper 13 is referred to as internal/external air switching. The ventilation duct 10' includes, toward the downstream side, a blower motor 14, a cooler 15 from a cold soot evaporator (evaporator) of a cooling cycle 22, a heater core 16 whose heat source is engine cooling water, and this heater. 1
A damper 18 serving as a temperature control unit for adjusting the ratio of air passing through the bypass passage 17 to ventilation passing through the bypass passage 17 is sequentially arranged. At the most downstream side of the ventilation duct 10, two types of air outlets 19 and 20 are formed for blowing out the temperature-controlled air in the ventilation duct 10 toward the vehicle interior, and are designated by reference numeral 1.
One outlet 9 is an upper outlet for blowing cold air toward the upper part of the vehicle interior, and the outlet 20 is a lower outlet for blowing warm air toward the lower part of the vehicle interior. Upper outlet 19
A plurality of closing portions may be provided at appropriate locations within the vehicle interior, and these may be connected by a duct.
One of the upper and lower air outlets 19, 2, and the damper 21 is blocked. Air outlet 19 by damper 21,
The selection of 20 is called balloon □ switching. Each element arranged in the ventilation duct is subjected to temperature control by the temperature control damper 18 and to air conditioning according to the driving mode selected by the driver.

The air conditioner described in this embodiment has operating modes such as an internal/external air switching operation, an operation in which the cooler 15 is manually switched between operation and non-operation, and an economical operation in which the cooler 15 is automatically switched between operation and non-operation. (economical driving). When switching between inside and outside air, you can select cooling operation when the outside air temperature is quite high, inside air circulation operation when the atmosphere is dirty, or outside air intake operation when the inside air is dirty. Also,
Switching between inside and outside air may be performed automatically in conjunction with other driving modes. For example, when the cooler 15 is in the non-operating mode and the target indoor temperature cannot be obtained in the internal air circulation mode, the damper 13 automatically switches to outside air and enters the outside air intake mode. The choice of whether to operate or deactivate the cooler 15 is made when you want to use the cooler 15 for cooling operation when the outside air temperature is high, when you want to use the cooler 15 for dehumidification, or when you want to use the cooler 15 for heating operation when the outside air temperature is sufficiently low. used in cases.
In the economical operation, it is determined whether or not the operation of the cooler 15 is necessary to obtain the target indoor temperature, and the operation or non-operation of the cooler 15 is automatically controlled. It is used to reduce the drive energy and prevent consumption of the drive energy. The cooling cycle 22 including the cooler 15 includes a compressor (cold soot compressor) 24 driven by a propeller shaft of an engine 23 as a motor vehicle via a V-pull, a condenser 25, and a liquid receiver 26. , an expansion valve 27 is connected to the cooler 15 by piping, and the heat of the cold soot is released in the condenser 26, and the heat of the air introduced in the cooler 15 is absorbed into the soot. It's a cycle.

The temperature of the air that has passed through the cooler 15 is approximately 0° C., and is not significantly related to the temperature of the introduced air and the rotational speed of the compressor 24. The operation and non-operation of the cooler 15 approximately correspond to the operation of the cooling cycle 22. The cooling cycle 22 is stopped and operated by disconnecting and disconnecting the mechanical connection between the compressor 24 and the engine 23, which are its driving sources. The heater 16 is connected to a cooling water pipe connected to a cooling water bracket of the engine 23, and has a heat exchange function of discharging the heat of the cooling water heated by the engine 16.

The flow path adjustment valve 28 adjusts the flow path of the cooling water according to the cooling water temperature.
The amount of heat that passes through the heater 16 and the amount that passes through a radiator (not shown) are adjusted, so that the heater 16 also has a substantially constant heat exchange capacity. For temperature control and control of the operation mode, the cooling cycle 22 and the inside/outside air switching damper 13 in the ventilation duct 10 and the temperature adjustment damper 1 are used.
8. The outlet switching and the damper 21 are electrically driven.

An electromagnetic clutch 5 connects and connects the mechanical coupling mechanism between the compressor 24 and the engine 23, and connects the clutch to rotate the compressor 24 when energized via the power line 50a, and when deenergized. disengages the clutch and stops the compressor 24. The rotating state of the compressor 24 is called "on," and the stopped state is called "off." The inside/outside air switching damper 13 is driven by a negative pressure actuator instead of a diaphragm actuator 51 and a three-way switching solenoid valve 52 that switches between atmospheric communication and engine pressure communication. When the three-way switching solenoid valve 52 is energized via the power line 52a, negative pressure is supplied to the diaphragm actuator 51, and the damper 13 is moved relatively quickly from the outside air introducing state shown in the figure in the direction of the broken line arrow via the coupling mechanism 51a. When the electromagnetic valve 52 is deenergized, atmospheric pressure is supplied to the diaphragm actuator 51, and the force of a spring (not shown) pushes the damper 13 back to the illustrated position (internal/internal air introduction state). The temperature control damper 18 is driven by a negative pressure actuator consisting of a diaphragm actuator 53 and two solenoid valves 54 and 55 that control engine negative pressure communication and atmospheric communication. When the solenoid valve 55 is energized by the power line 55a, negative pressure is supplied to the diaphragm actuator 53 to slowly pull the damper 18 in the direction of the arrow through the connection mechanism 58a. The damper 18 is slowly pushed back by a spring (not shown) supplied with atmospheric pressure.

When both solenoid valves 54, 55 are deenergized, the diaphragm actuator 53 is stopped and the damper 18 is stopped and held in its current position. The relationship of the damper 18 is 100% when the bypass passage 17 is fully closed (maximum heating position), and 0% when the upstream side of the heater 16 is fully closed (minimum heating position). Blowout□Switching damper 21
is driven by a negative pressure actuator consisting of a diaphragm actuator 56 and a three-way switching solenoid valve 57 that switches between atmospheric communication and engine negative pressure communication.
When the diaphragm actuator 56 is energized, negative pressure is supplied to the diaphragm actuator 56, and the damper 21 is relatively rapidly pulled from the illustrated position (lower blowout) via the connecting mechanism 56a to upper blowout, and the solenoid valve 57 is activated.
When deenergized, atmospheric pressure is supplied to the diaphragm actuator 57 and a spring (not shown) pushes the damper 21 back to the position shown.

The control device 1 includes the electromagnetic clutch 5, which is an electrically driven member.
0, switches between energizing and deenergizing the solenoid valves 52, 54, 55, and 57, and commands temperature control and control of each operation mode.

The control device 1 is also connected to various information input means for temperature control and operation mode control, and processes the input information based on a control program set internally in advance to control the electrical control members. Activate. The blower motor 14 rotates when energized by the power line 24a to create a flow of air within the ventilation duct 10.

The blower motor 14 operates regardless of the target temperature and operating mode as long as the air conditioner is in operation. As means for inputting various information to the control device 1,
An inside temperature sensor 60 is installed in a small passage provided at the upstream part of the ventilation duct 10 so that inside air can pass through, and generates a signal according to the inside air temperature. An outside temperature sensor 61 that generates a signal according to the outside temperature, an opening sensor 62 that generates a signal according to the opening degree (position) of the temperature control damper 18, and a control device. There is an operation panel 2 installed near 1.

Although the control device 1 is installed near the air conditioner, the operation panel 2 may be installed, for example, on an instrument panel in front of the driver's seat. The operation panel 2 includes a temperature setting device 63 that generates a signal according to the target indoor air temperature setting, a main switch 64 that commands the air conditioner to operate or deactivate, and a switch that selects the operation mode. , a switch (hereinafter referred to as an air conditioner switch) 65 that selects the operation or non-operation of the cooler 15, that is, the cooling cycle; a suction port changeover switch 66 that selects the suction port, that is, the inside air introduction low 1 and the outside air introduction low 2; An economical switch 67 for selecting the operation and a short-time inside air switch (hereinafter referred to as a short-term inside air switch) 68 are provided for turning the suction port into the inside air inlet 11 for only a few minutes. Further, the operation panel 2 may be provided with display means for displaying the internal air temperature under control. Power is supplied to the device from a car battery 3 via an ignition key switch 4.

FIG. 2 is a wiring diagram showing mutual electrical connections between the control device 1, various information input means, and electrical control members.

Among the information input means, the inside temperature sensor 60, the outside temperature sensor 61, the damper opening sensor 62, and the temperature setting device 63 on the operation panel 2 input respective generated signals to the control device 1 in the form of analog voltage signals. Therefore, heat-sensitive resistance elements such as thermistors are used as the inside temperature sensor 60 and the outside temperature sensor 61, and analog voltages generated at their terminals when energized are sent to the control device 1 through signal lines 60a and 61a.
is connected to. Among the various switches on the operation panel 2,
One end of the air conditioner switch 65, suction selector switch 66, economy switch 67, and short internal air switch 68 is grounded, and the ends of the air conditioner switch 65 are connected to the control device 1 through opening/closing contacts.
The first three are operation memory type switches, and the latter short shyness switch 68 is a self-reset type switch. As will be described in detail later, when the short introvert switch 68 is closed, this fact is maintained as an electrical signal within the control device 1. The main switch 64 on the operation panel 2 has one end connected to the ignition key switch 4 and the other end connected to the blower motor 14 and the electric drive members 52, 54, 55, 57.
Since the other end of the blower motor 14 is connected to the power supply line, the blower motor 14 rotates while the main switch 64 is closed. The ends of the power lines of the electrical drive members 52, 54, 55, 57 are connected to the control device 1, and the power line 50a of the electromagnetic clutch 50 among the electrical drive members is also connected to the control device. 1, a power supply path is established. The operating power for the control device 1 is supplied through the ignition key switch 4, not through the main switch 64. Therefore, the control device 1 operates with the ignition switch 4 closed. However, as mentioned above, main switch 6
4 is not closed, power cannot be supplied to the blow motor 14 and the electric drive member, so the control device 1 is kept in a standby state during that time. The control device 1 includes a microcomputer 100 as a functional component that controls the entire air conditioner.

The microcomputer 10 explained in this example,
It is a 4-bit one-chip microcomputer MB8841 manufactured by Fujitsu Limited, which has built-in ROM, RAM, 1/0 board, timer, etc. in addition to a CPU.

The MB8840 series user manual published by Fujitsu Ltd. can be used for its internal configuration, connection of bins, handling, etc. The control device 1 includes coupling circuits and processing circuits for operatively coupling the microcomputer 100 with information input means and electrical drive members. First, as a circuit for inputting an analog signal to the microcomputer 100, a front layer amplifier circuit group 110, an analog multiplexer 120, and an analog-to-digital conversion circuit (A-○ conversion circuit) 130 are used. The front layer amplifier circuit 110 includes separate front amplifier circuits 111, 11 that independently amplify each signal from the inside air sensor 60, the outside air sensor 61, the damper opening sensor 62, and the temperature setting device 63.
It consists of 2,113,114. For elements whose total resistance changes, such as the inside air sensor 60 and the outside air sensor 61, the circuits shown in FIG. 3 are used as the previous calendar amplification circuits 111 and 112. In FIG. 8, an inside air sensor 60, an outside air sensor 6
A resistor 111a is connected in series with the element 6' representing 1, and the voltage at the connection point and the output voltage of a reference voltage generator consisting of a variable resistor 111b and a resistor 111c are connected using an OBE amplifier 111d. The voltage is input to a differential amplification circuit, and an amplified voltage corresponding to the difference between the two voltages is obtained. Damper opening sensor 62 and temperature setting device 6
In the case where the output signal is already a voltage signal as in 3, the circuit shown in FIG. 4 is used as the pre-counterfeit amplifier circuits 113 and 114. In FIG. 4, the damper opening sensor 62
and the voltage from element 6' representing temperature setting device L63,
The output voltage of a reference voltage generator consisting of a variable resistor 113a and a resistor 113b is input to a differential amplifier circuit using an obeamp 113e, and an amplified voltage corresponding to the difference between the two voltages is obtained. In the two types of front direct amplifier circuits shown in FIGS. 3 and 4, variable resistors 11b and 1
13a is used to adjust the gain of the amplification, adjust the level of the input analog signal, and convert it to a level that is easy to calculate in the microcomputer 100'. The analog multiplexer 120 has analog switches 121,1
22, 123, 124 and inverters 125, 126, 127, 128 connected to their control gates, and each input terminal of the inverters 125 to 128 is connected to pin Ro of the input/output ports Ro to R, 5 of the microprocessor 100.
~ Connected to R3.

The analog multiplexer 120 connects the analog switches 121 to 12 in the order instructed by the microcomputer 100 (at this time, the output from the pin becomes 0 level).
4 are individually turned on, and one output voltage of the pre-counterfeit amplifier circuit 110 is sequentially input to the A-D conversion circuit 130. The A-D conversion circuit 130 includes a voltage comparator 131 and a ladder voltage generator 132.
The input terminal of voltage comparator 131 is connected to pin R4 of the input/output boat. This type of A-D conversion circuit 130 is, for example,
Nippondenso Public Technical Report Vol. 20, July 20, 1978)
II. No. 76 as a temperature detection circuit, but since it has been known for a long time, a description of its operation will be omitted.
Microcomputer 0 river parallel output boat oo~0
Binary code output from 7 and input/output boat Ro~R, 5
The analog signal can be recognized as a digital quantity depending on the input signal level of pin R4. An on/off signal amplification circuit 140 is used as a circuit for inputting a switch signal to the microcomputer 10.

On-off signal amplification circuit 14 Generates a binary voltage signal with an inverted signal depending on whether one terminal of the switches 65 to 68 used to select the operating mode is at ground voltage due to contact closure or in an open state. individual amplifier circuit 14
1, 142, 143, 144, each output terminal is connected to the non-latching input port Ko of the microcomputer 00.
~ Connected to K5. These amplifier circuits 141 to 14
4, as shown in a typical example by reference numeral 141, when the switch contact is in the closed state, the transistor 141 generates a 1 level signal at its collector which is turned on, and when the switch contact is in the open state, the transistor 141 is turned off. and sets the collector to the 0 level. Microcomputer 1
00 is 1 level or 0 for each pin of input boat Ko to K3
Switches 65 to 68
The operating status of the device can be recognized. microcomputer 100
'Thus, the electromagnetic clutch 5 as an electrical drive member
0, the solenoid valve 52 that drives the inside/outside air switching damper 13, the solenoid valves 54, 55 that drives the temperature adjustment damper 18, and the solenoid valve 57 that drives the blowout □ switching damper 21 are turned on and off to switch between energization and deenergization. A signal amplification circuit 150 is used.

Solenoid valves 52, 54, 55, 57 excluding the electromagnetic clutch 50
Individual amplifier circuits 151, 153, 154,
Reference numeral 155 is configured to directly energize the electromagnetic valve using two transistors 151a and 151b that operate in reverse, for example as shown in FIG. Furthermore, since the amplifier circuit 152 that operates the electromagnetic clutch 50 requires a large amount of output, a relay 152a is used as shown in FIG. Relay drive transistor 152b is operated via inverter 152c, and both the one shown in FIG. 5 and the one shown in FIG. 6 energize the electrical drive member when the output of microcomputer 100 is at 0 level. The power supply circuit 170' supplies the power necessary for the operation of the control device 1, and is converted from the terminal voltage of the battery 3 to 15V by a known constant voltage power supply circuit 171.
Create a constant voltage power supply and supply it to each circuit.

In addition, the voltage as it is from the battery 3 (for example, 1
2V) is supplied to the on/off signal amplification circuit 1501. A starting circuit 180 is included as a circuit attached to the microcomputer 10. The starting circuit 180 outputs a 0 level signal to the microcomputer 1 for a certain period of time when a voltage of 5V is applied by closing the ignition key switch 4.
It has the function of initializing the microcomputer 100 by inputting it to the RESET terminal of 00. During the initialization of the microcomputer 10, all output ports output 1-level signals. A resistor and a capacitor are connected to the clock generator terminals Extal and Etal of the microcomputer 100 to form an IMHz clock generator. The microcomputer MB8841 manufactured by Fujitsu Limited has additional terminals that are not shown in the drawings, but they are omitted because they are not necessary in this embodiment. The control device 1 may further include a display signal conversion circuit 160 for displaying the indoor air temperature when the ignition key switch 4 is closed.

Conversion circuit 16 For example, by using a decoder that converts the binary code sent from pins R, 2 to R, 5 of the input/output boat of the microcomputer 00 into individual logic signals, it can be converted according to the internal temperature. light emitting diode group 2
A predetermined light emitting diode can be turned on from '. The light emitting diode group 2' may be provided in the display panel. Next, the temperature control method and each operation mode will be explained. In FIG. 7, which diagrammatically illustrates the operation of the air conditioner, the deviation between the signal T2 indicating the set temperature and the signal Tr indicating the measured value of the indoor air temperature by the indoor salt sensor 60 is determined by the deviation detecting section 201, and the deviation is calculated according to the deviation. The temperature control damper 18 is driven to raise or lower the temperature of the controlled object (vehicle interior air) 200. As a result, the temperature of the controlled object 200 having a predetermined heat load changes, and this change is fed back to the deviation detection section 201 as a change in the signal Tr indicating the measured value of the inside temperature sensor 60. As a result, the inside temperature The function of the damper 18 is repeatedly adjusted so that the temperature Tr approaches the set temperature L. However, the heat load on the controlled object 200 is not constant and changes depending on various factors. In air conditioners for automobiles, there is a problem of a delay in response of the control system, including a delay in heat propagation in the controlled object 200', and for example, it is impossible to keep the inside air temperature Tr constant in response to changes in the outside air temperature Tam. There's a problem. Therefore, by employing predictive control, that is, by detecting a disturbance element such as the outside air temperature Tam in advance, and applying a correction signal to the deviation detection unit 201 at the same time that the thermal load of the controlled object 200 is affected by the disturbance. to maintain the internal air temperature Tr stably. In predictive control, in order to bring the inside air temperature Tr closer to the set temperature T2, we experimentally calculate in advance what kind of corrections should be made under what conditions for other elements involved in temperature control. .

In this embodiment, the following calculation formula is used to drive the temperature adjustment damper 18. K,=Kr+Kam+Kpo+
OF+MF.・・・．・．． '1}△Kpo=K2-K. ...'2' Here, the opening degree of the temperature control damper 18 is controlled so that the deviation ΔKpo is within a certain predetermined range.

The term Kr for the inside air temperature and the term Ka for the outside air temperature in equation '1}
m and the damper opening degree Kpo are obtained by multiplying the actually measured inside air temperature Rr, outside air temperature Tam, and damper opening degree Tpo by a predetermined gain constant, respectively. Correction term MF
is when the air conditioner is not operating the cooler 15 (
(when the compressor is off), that is, if the temperature of the air after passing through the cooler 15 is not 000, the seal is used to correct the damper opening accordingly. This MF is shown as a value obtained by multiplying the inside air temperature Tr by a predetermined constant if the operation mode is the inside air type, or by the outside air temperature Tam if the operation mode is the outside air type. In order to make the temperature control system accurately match the target set temperature T2, the correction term CF is calculated based on the set temperature T2 and the inside air temperature Tr.
This is a correction term that is determined in response to the deviation by comparing the Note that, as will be described later, since the inside air temperature Tr is not constant in the initial state when the operation of the air conditioner is started, the correction term CF is used in the calculation after waiting for the inside air temperature Tr to become stable.
Note that in the predictive control of temperature control, it is possible to correct disturbance elements other than the outside air temperature Tam. For example, a correction term related to the amount of solar radiation, the speed of the vehicle, the number of passengers, etc. may be added to the right side of the equation {1}. The gain constants of each term Kr, Kam, Kpop, CF, and MF in the above equation {1} are determined to be values converted to temperature, and therefore the added value K, is adjusted under the conditions indicated by each of these terms. The temperature of the controlled object 200 to be controlled is shown.

In the above formula ■, the temperature K to be controlled calculated using formula '1} and the target temperature K2=L are compared and the difference △
Take out Kpo to drive the damper. In FIG. 7, which diagrammatically illustrates these calculations, the solid rectangular frames 211, 2
12, 213, 214, and 215 indicate the gain calculations for each term performed when performing the above calculation, and circles 201 and 2
05 indicates deviation detection, and circles 202, 203, and 204 indicate addition.

The switching of the upper and lower air outlets by the air outlet □ switching damper 21 is as follows:
It is automatically determined according to the opening degree of the temperature control damper 18, that is, the temperature of the blown air.

However, as described above, the temperature of the blown air differs even when the damper opening is the same when the compressor is on and off, so in order to correct this, a correction value Ms is obtained by the correction process 215 and used for switching the air outlet. The temperature control and operation mode control illustrated in FIG. 7 are sequentially executed according to a control program stored in the ROM of the microcomputer 100.

An outline of the control program is shown in FIG. When the ignition key switch 4 is closed, the control device 1 is put into operation, and when the microcomputer 10 is supplied with power, the control program starts executing from a start step 300. Initialization is then performed by the startup circuit 180', and in the initial setting routine 400, conditions that become the basis for program execution are set. Initial setting routine 40
0 includes, for example, resetting a timer function, which will be described later, or first setting the correction term OF in the temperature control calculation formula to 0. The control program includes an initial temperature reading routine 500, an analog signal reading and related processing routine 600, and an operation mode determination and related processing routine 70.
0, a temperature calculation, a temperature adjustment damper drive routine 800 to close the calculation, a convergence correction processing routine 900, and then return to the routine 500 or routine 600, and repeat this process thereafter.

The time interval of this repeated processing (approximately equal to the processing interval of routine 800 without routine 600) is approximately several tens of milliseconds. Processing temperature lowering routine 500 in FIG.
and analog signal logic and related processing routines 600
The details are shown in Fig. 9. Further, operation mode determination and related processing routines 700 are shown in FIGS.
The convergence correction processing routine 900 is shown in FIG. 14, and the convergence correction processing routine 900 is shown in FIG.
As shown in the figure. The symbols A, B, C, D, and E indicating the start, end, and branch ends of each routine in FIGS. 9 to 16 are made to match the same symbols in FIG. 8. According to Figure 9,
The initial temperature loading routine 500 and the analog signal reading and related processing routine 600 will be described.

First, in step 501, one of the timer functions (timer 1) built into the microcomputer 00 is started. The timer function that uses the timer/counter built into the microcomputer is explained in the user manual for the MB8840 series mentioned above, but in this embodiment, the overflow of that timer/counter is counted by software as timer 1. (R.A.
A two-minute timer is created by setting the predetermined location of M as a counter. Similarly, timer 2, which will be described later, is set to 1.
It configures a 0 minute timer. Next, in step 502, the initial inside air temperature Tr(0) is read.

At this time, as described above with reference to FIG. It is read as a digital quantity. Note that in order to create an appropriate correspondence between the output signal of the internal temperature sensor 60 and the digital quantity read from the A-D conversion circuit 130, the microcomputer 00'
At this point, software processing may be performed. The obtained value indicating the inside air temperature Tr is the initial inside air temperature Tr.
(0) and is stored in the RAM. Then step 60
1,602, 603, and 604, respectively, the internal air temperature Tr
, the outside air temperature Tam, the set temperature T2, and the temperature adjustment damper function Tpo are incorporated, and the associated arithmetic processing is executed.

Gain multiplication is also performed for each term in order to execute the temperature calculation equation. When the inside air temperature Tr is read, the inside air temperature term Kr, which is obtained by subtracting a predetermined gain Kr used for temperature calculation, is used together with the digital quantity Tr as a correction term when the compressor is turned off for temperature calculation. A predetermined gain Q is used for a calculated term Mi and a correction calculation for selecting the upper and lower air outlets. A term Msi obtained by subtracting a predetermined gain 8 is calculated and stored at a predetermined location in the RAM. When outside temperature Tam is read, its digital quantity T
Along with am, a predetermined gain Ka used for temperature calculation
A term Kam, which is the outside air temperature calculated by m, a term Mx, which is calculated by calculating the predetermined gain Q, which is used as a correction term when the compressor is turned off for temperature calculation, and a correction calculation for selecting the upper and lower air outlets. Term M calculated for each predetermined gain
xi is calculated and stored in RAM.

When the set temperature T2 is lowered, the digital quantity T2 is directly stored in the RAM as a term K2 used for temperature calculations and other purposes.

When the damper opening degree Tpo is read, the digital quantity Tpo expressed as a percentage (%) is stored in the RAM as a value Kpo obtained by subtracting a constant gain Kpo used for temperature calculation.

Next, the inside air temperature display processing routine 605 is executed.
Since the temperature display itself has little to do with the gist of the present invention, its explanation will be omitted. c indicates the branch input end,
When the initial temperature lowering steps 501 and 502 are not used, that is, until at least 2 minutes, which is the effective storage period for the initial temperature Tr(0) as described later, has not elapsed, the program is input through this branch input terminal c. Executed repeatedly. An outline of the operation mode determination and related processing routine 700 will be explained with reference to FIGS. 10 to 13.

In the two determination steps 701 and 702, the operation panel 2
air conditioner switch 65 and economic switch 67
Pins Ko and K2 of the input board of the microcomputer 100 determine whether the input port is open (off) or closed (on).
It is determined by the signal level.

Then, in determination step 701, if the air conditioner switch is off, that is, if an operating mode in which the compressor is off and the cooler 15 is not used is specified,
Processing is executed according to line a. (Note that the judgment steps indicated by diamonds are ``YES'' for horizontal flow and ``NO'' for downward flow.) Since the combustor is in the OFF operation mode, first step is the output step. At 703, a command signal for turning off the combustor is output.
Referring to FIG. 2, the microcomputer 10
A 1 level signal is output to pin R8 of the input/output boat with a river lock, amplified by the on/off signal amplification circuit 152, and output as a deenergization signal to the electromagnetic clutch 50'.
If the state of the electromagnetic clutch 5 was energized before then, it is switched to deenergized, and if it was deenergized, it remains as it is.
Next, the microcomputer 100 executes the routine 70
Step 4: Check the signal level of pin K of the input boat to determine whether the suction port selector switch 64 is closed (off) indicating an internal air type or closed (on) indicating an outside air type.
In addition, the signal level of pin K3 of the input boat is checked to determine whether the short internal air switch 64 is engaged (off) or closed (on), and a solenoid valve is activated to drive the internal/external air switching damper 13 according to the determination. Specify energization or deenergization of 52. Then, the correction term MF in the above-mentioned temperature calculation formula is determined depending on whether it is an internal air type (including a short internal air type) or an outside air type. In other words, if it is an internal air type, Mi (=QTr)
, if it is an outside air type, select Mx (=yTam). Next, in order to switch between the upper and lower air outlets, calculate the degree of opening of the temperature control damper 18 at that time that corresponds to the degree of the blown air, and according to the calculated value, if the blown air is, for example, 3 pi○ or more, If the temperature is below 30 oC, the air outlet switching damper 21 should be driven such that the lower air outlet 20 is activated, and the upper air outlet 19 is activated if the temperature is below 30oC.
A signal specifying energization or deenergization of the solenoid valve 57 is output from pin R7 of the input/output boat. When the pin R7 is at the 1 level, the solenoid valve 57 is deenergized and the inside/outside air switching damper 21 opens the lower outlet 20. When the pin R7 is at the 0 level, the solenoid valve 57 is energized and the inside/outside switching damper 21 is opened at the upper side. Opening the air outlet 19 is as described above. FIG. 11 specifically shows a control program for the compressor after line a and when it is turned off.

In the inside/outside air determination step 705, when the intake port changeover switch 66 is closed, it is determined that the "inside air type" is selected, and step 7
At 06, the solenoid valve 5 is activated to set the inside/outside air switching damper 13 to the inside air side.
2 (produces a 0 level signal at pin R9 of the input/output port of the microcomputer 100). Next, as the correction term MF for temperature calculation, the time Mi related to the inside air temperature Tr is read out from the RAM and set.

In other words, since the compressor is off and an internal air type, the temperature of the air sent from upstream of the temperature control damper 18 is not 0°C (the temperature of the air after passing through the cooler 15 when the compressor is on), but the internal air temperature Tr. Therefore, depending on the inside air temperature Tr, if the inside air temperature Tr is 0° C. or higher, the temperature control damper 18 is moved to the cooling side (the proportion of air passing through the bypass passage 17 is increased rather than passing through the heating side 16). The correction term MF is determined so that the heating side is driven to the heating side when the inside air temperature Tr is 0° C. or lower.
As mentioned above, Mi is calculated by multiplying the inside air temperature Tr by the gain constant B, but the gain constant Q is an experimental result of investigating the relationship between the inside air temperature Tr, the damper function, and the temperature of the blown air at that time. Determined by data. Note that when the combustor is on, such correction is not necessary, so the correction term M pressure is set to 0. Step 70-8, 709, 71
0 is arithmetic processing for determining the upper and lower positions of the air outlet.

When the compressor is on, if the damper opening is, for example, 60%, a blowout air temperature of 3000 can be obtained.If you switch the air outlet up and down depending on whether the damper opening is larger or smaller than 60%, you can create a cold head and foot heat type. However, when the compressor is off, if the outlet is simply switched by the damper opening, it is not possible to switch the outlet depending on the temperature of the outlet air, for example 30°C, and the intake air The relationship between the damper opening degree and the blown air must be corrected depending on the temperature. In step 708, the correction term Ms
A value Msj obtained by multiplying the inside air temperature Tr by a gain constant of 8 is selected as the value. Then, in step 709, the damper function s indicating the switching point of the air outlet is corrected. Here, D is a value indicating the damper opening degree, for example, 60%, at which a blowout air temperature, for example, 30 qo, which is the boundary for switching the blower outlet when the compressor is turned on, is obtained. Next, in step 710, it is determined whether the actual damper function Kpo is larger than the damper function s that determines the switching point of the air outlet. In order to blow air, a de-energizing command is output to the solenoid valve 57 to open the lower air outlet 20 by the switching damper 21. Step 710
If the actual damper coefficient Kpo is smaller than the boundary value s in step 712, an energizing command for the solenoid valve 57 is output in order to blow cold air mainly to the upper body of the occupant, and the switching damper 21 Open the air outlet 19. If the result in the inside/outside air determination step 705 is "No," then in the short-term inside air determination step 113 it is determined whether the short-term inside air switch 68 is on.

If ``No,'' it means that the outside air type is used, and the process moves to step 717; however, if ``Yes,'' the timer switches 714, 715, and 716 switch to the inside air type for a certain period of time, for example, 10 minutes, and after 10 minutes, the outside air type is used. As mentioned above, the short-time internal air switch 68 is a self-resetting type, so when it is temporarily closed, the process moves from judgment step 713 to step 714 and moves to step 715, and the timer 2 as a built-in timer function is switched to Start it, step 7
From 06 onwards, the internal air type process described above is executed. Then, in step 715, the timer 2 is started, and at the same time, a numerical value indicating that the internal air switch 68 has been closed for a short time is stored in a predetermined location in the RAM, and this is determined in determination step 713. And timer judgment step 7
16, when it is determined that one female has passed,
The numbers stored in the RAM are deactivated. In the case of the outside air type, first in step 717, the inside/outside air switching damper 13 is
A deenergizing command signal for the solenoid valve 52 is output to release the air to the outside air inlet 12.

Next, the correction term MF for temperature calculation is changed to the outside air temperature Tam
Mk', which is obtained by multiplying by the gain constant y, is determined. Next, in steps 719, 720, and 721, the damper opening degree s, which determines the upper and lower positions of the air outlet, is corrected by the value Msx, which is obtained by multiplying the outside air temperature Tam by a certain gain constant, as in the case of the internal air type, and this The upper and lower sides of the air outlet are determined by comparing with the opening degree Kpo. In steps 722 and 723, the solenoid valve 57 for driving the blowout □ switching damper 21 is deenergized according to the determination.
Commands energization. Returning to FIG. 10, in the air conditioner switch determination step 701, if "No" (the air conditioner switch is on), the next determination step 702 determines whether the economical switch 67 is on or off.

If the economization switch is off (“no”), processing is executed according to line b so that the air conditioner is operated in the normal operation mode with the compressor on.First, in step 724, a command to turn on the compressor is issued, i.e. An electromagnetic clutch 52 is used to operate the cooling cycle.
Outputs a signal to energize. Next, in routine 725, it is determined whether it is an internal air type, an outside air type, or a short time internal air type, and the internal/external air switching damper 18 is controlled according to the determination, and the air outlet is switched according to the opening degree of the temperature control damper. and execute. Details of the routine 725 will be explained with reference to FIG.

When the cooling cycle is operated in step 724, the correction term M for temperature calculation is set to 0 in step 726, and the on/off status of the suction port changeover switch 66 and short internal air switch 68 is checked in judgment steps 727 and 728, and internal air type is specified. If so, the process advances to step 729 and outputs an energizing command signal for the solenoid valve 52 to drive the inside/outside air switching damper 13 to the inside air introduction side. A deenergization command signal is output to drive the inside/outside air switching damper 13 to the outside air introduction side. In addition, if the short-time internal air type is specified, the timer processing steps 731, 732,
733, the internal air type is used for 10 minutes and then switched to the outside air type. Next, process step 7 to switch the air outlet up and down
34, 735, 736, and 737, but since the cooling cycle is being operated and the temperature of the air that has passed through the cooler 15 is constant at approximately 0°C, the temperature adjustment damper 18
The temperature of the blowing air can be determined by the opening degree Kpo of the damper opening D corresponding to the blowing air temperature of 30°C.
(generally about 60%) is set as the damper function s indicating the switching point of the air outlet, and this is compared with the actual opening to determine the upper and lower positions of the air outlet, and the energization and deenergization of the solenoid valve 52 is controlled. do.

Returning to FIG. 10, in the air conditioner switch determination step 701, "No (air conditioner switch is on)"
and the next economic switch determination step 702
If it is determined as "Yes" (the economical switch 67 is on), the process proceeds to line c and controls the air conditioner in the economical operation mode.

First, compressor on/off condition determination routine 73
In step 8, it is determined whether the internal air type or the external air type is specified, and the internal/external air switching damper 13 is driven accordingly, and if the short internal air type is specified, the short internal air processing routine 739 is executed. Execute. When the inside air type or outside air type is specified, the target set temperature T2 and the inside air temperature T are used to determine whether it is necessary to obtain a large cooling effect by cooling down, that is, by rapidly starting cooling.
When cool down is necessary, the air conditioner is operated in the normal mode with the compressor turned on, according to line b, until cool down is no longer necessary. After the cool-down process, it is determined whether the target set temperature T2 can be obtained without operating the cooling cycle by comparing the set temperature T2 and the outside temperature Tam, and if the set temperature T2 cannot be obtained as a result of the determination, , Aya b' Therefore, the set temperature T
The air conditioner is operated in the normal mode with the compressor turned on until it is determined that 2 is obtained. When it is determined that the target set temperature L can be obtained without operating the cooling cycle, a control routine 740 for turning off the compressor is executed.

In this control routine 740, the operation of the cooling cycle is stopped and at the same time, the intake port is switched to the outside air type and the air conditioner is operated. The Ekonomi operation mode will be explained in detail with reference to FIG.

First, in suction port determination steps 741 and 742, it is determined whether the internal air type, the external air type, or the short-time internal air type is designated. And in case of internal air method, step 7
In step 43, the inside/outside air switching damper 13 is set to introduce inside air, and in the case of outside air type, the inside/outside air switching damper 13 is set to outside air inlet in step 744.In the case of short-time inside air type, timer processing steps 745, 746, and 746a are used to turn the inside/outside air switching damper 13 into outside air. After 10 minutes, use the inside air type, and after 10 minutes, use the outside air type. Short-time internal air processing steps 747, 748, 749, 750, 75
1,751,753 is almost the same as the control when the compressor is turned on as explained in FIG. 12, and the only difference is that it has already been determined whether it is an internal air type or an outside air type. In the case of a short-time internal air type or an external air type, a drive command signal for the suction port switching damper 13 is output in steps 743 and 744, and then a cool-down necessity determination routine consisting of steps 754, 755, and 756 is executed. Step 7
At step 54, a temperature difference P between the set temperature L and the inside air temperature Tr is calculated, and this temperature difference P becomes a predetermined temperature difference B, for example 1. is o
If it is smaller, no cooldown is required in step 755 ("
Yes, it is determined that the temperature difference P is the temperature difference B+b, for example, 2. is smaller than 0, step 756 determines that cool-down is not necessary (determined as No, and the temperature difference P is, for example, 2.6o).
If it is larger than o, it is determined that a cool-down is necessary, and control proceeds from step 756 to the normal operation mode when the compressor is turned on, as shown in FIG. 12, via the branch end b. The reason why the temperature difference b is set to determine the temperature difference P in determination steps 755 and 756 is to prevent the combustor from repeatedly turning on and off by providing hysteresis in the determination level. be. If it is determined that cool down is not necessary, a capability determination process is executed in steps 757, 758, 759, and 7601 to determine whether the target set temperature T2 can be obtained without operating the cooling cycle. This capability determination process is to determine whether the temperature of the introduced air is sufficiently low relative to the set temperature T2. When this air conditioner is used for cooling, in principle, in order to stably match the indoor air temperature Tr to the target set temperature without operating the cooling cycle, outside air must be introduced and the outside air temperature T
am must be sufficiently lower than the set temperature T2. In this embodiment, when the temperature difference R between the set temperature T2 and the outside air temperature Tam is calculated in step 757, the temperature difference R is, for example, 7° C. when the cooling cycle is stopped (compressor is off).
As described above, when the temperature is lower than 7° C., for example, 1000° C. or higher during operation of the cooling cycle (compressor off), it is determined that the cooling cycle may be stopped (capable). Temperature difference R
When is smaller than the above value, it is determined that the compressor is incapable, and the compressor shown in FIG. 12 is controlled in the normal mode when turned on according to line b. If it is determined that the target set temperature can be obtained by stopping the cooling cycle, in step 761 a deenergization command signal for the electromagnetic clutch 50 is output to stop the cooling cycle, and in step 762 the electromagnetic valve 52 is
A deenergization command signal is output to switch the inside/outside air switching damper 13 to outside air introduction. Further, a correction term MF for temperature calculation is determined to be a value Mx related to the outside air temperature Tam. Next, in steps 765, 766, 767, and 768, processing is performed to determine the upper and lower positions of the air outlet. The processing from step 763 to step 768 is the same as from step 718 to step 723 in FIG. 11, which was explained as the control when the compressor is turned off. Next, a temperature calculation for driving the temperature adjustment damper 18 and a damper driving routine for the calculation will be explained with reference to FIG.

In steps 801 and 802, the temperature calculation formula (1
}, '2} is calculated. Among the terms necessary for this calculation, K2
, Kr, Kam, and Kpo are stored in the RAM by analog signal reading and related processing routines (see Figure 9), and for MF, operation mode determination and related processing routines (see Figures 10 to 13) are stored in the RAM. (see figure), and OF is set to 0 in the initial setting routine, and in steps 801 and 802, these values are simply read out from the RAM and calculated. △Kpo obtained as a result of calculation is calculated from various operating conditions of the air conditioner at that time, and is calculated from the temperature K of the controlled object to be controlled, and the temperature K of the controlled object to be controlled. , the target set temperature K2 (=
The deviation from T2) is shown.

Next, judgment steps 803, 804, 805, 806, 8
In 07,808, it is determined whether the deviation △Kpo is "almost 0", larger than that, or smaller,
When the deviation △Kpo is approximately 0, both the solenoid valves 54 and 55 are deenergized in step 809 to stop the temperature control damper 18, and when the deviation △Kpo is greater than "approximately 0", the inside air temperature Tr is set to the set temperature. To set T2, it is determined that the temperature K to be controlled is "low", that is, the temperature of the blown air is low, and in step 811 the solenoid valve 55 is energized to move the damper 18 in a direction that increases its opening degree. and when the deviation △Kpo is smaller than "approximately 0", the temperature K to be controlled to bring the inside air temperature Tr to the set temperature T2,
is high, that is, the temperature of the blown air is high, and in step 81, the solenoid valve 55 is energized to drive the damper 18 in a direction that reduces its opening degree. Here, in judgment steps 803 to 808, the deviation △Kpo
In addition to adding hysteresis to the judgment level with a predetermined width, the solenoid valve 54 and the solenoid valve 5 are
The energization of 5 is arranged so that it will not be switched all at once.
Judgment steps 803 and 804 are performed by the solenoid valve 54,
55 is energized (on) or deenergized (off). If either of them is energized, it is determined in steps 805 and 806 whether the energization should be connected or switched to de-energized based on the magnitude of the deviation ΔKpo. If neither of the electromagnetic valves 54 and 55 is energized, it is determined in steps 805 and 806 whether to maintain the deenergized state or to energize one of them. The functions of determination steps 803 to 808 are illustrated in FIG. 15. In FIG. 15, a solid line 55a shows the relationship between the energization and deactivation of the solenoid valve 55 and the deviation ΔKpo, and a solid line 54a shows the relationship between the energization and deactivation of the solenoid valve 54 and the deviation ΔKpo.

When the solenoid valve 55 involved in temperature rise is switched from deenergized to energized, the process proceeds from determination step 807 of 100 to switching step 811, and conversely, when it is switched from energized to deenergized, the From judgment step 806 to switching step 8
Proceed to 09. Further, when the solenoid valve 54 involved in temperature reduction is switched from energized to de-energized, -0.4°C judgment step 8
10, the process proceeds to switching step 810. Conversely, when switching from energization to de-energization, the process proceeds from 0° C. determination step 805 to switching step 809. Deviation △Kpo is 0℃~0.600
When is "approximately 0", both electromagnetic valves 54 and 55 are in a de-energized state. If either of the solenoid valves 54 and 55 is energized, the temperature control damper 18 is in operation, which means that the temperature control is not yet stable. Processing routine 600
(Refer to Figure 9).

branch end C until both solenoid valves 54 and 55 are deenergized.
Repeat the process through . When both the solenoid valves 54 and 55 are deenergized, the process moves to timer determination step 812. The timer determination step 812 performs the initial temperature lowering routine 500 (
(see FIG. 9), it is determined whether two minutes have elapsed since timer 1 was started. Then, while two minutes have not elapsed, the process passes through the branch terminal C and returns to the analog signal input and related processing routine 600'. That is, once the initial temperature reading routine 500 is passed, the analog signal transfer and related processing routine 600, operation mode determination and related processing are performed for at least two minutes and until both the solenoid valves 54 and 55 are energized. The processing routine 700 and the temperature calculation and temperature adjustment damper drive routine 800 based thereon are repeatedly executed. In addition, in a general air conditioner, the outside air temperature Tam
If there are no major changes such as
The opening degree of is stabilized. Both the solenoid valves 54 and 55 are deenergized, and the initial internal air temperature Tr(0) is lowered to 2.
If the minute has elapsed, the process moves from determination step 812 to the convergence correction processing routine shown in FIG.

In the convergence correction processing routine, as a result of the temperature calculation and the processing of the temperature adjustment damper drive routine 800 based on the temperature calculation,
When the temperature control damper 18 stops and the temperature of the blown air becomes stable, steps 901, 902, and 903 are followed to read out the internal air temperature Tr (read in the analog signal reading and related processing routine 600) from the RAM and use it in that state. ) is compared with the initial temperature Tr(0) at the time of starting the timer, and it is determined whether the inside air temperature Tr has stabilized within approximately 2 minutes. If the temperature is not stable, the process returns to terminal A and starts the process again from the initial temperature reading routine 500. Inside air temperature Tr
If r is approximately the same for 2 minutes, the calculation formula [1},'
2} is considered to be stable. Next, in steps 904, 905, 906, 907, and 908, the internal air temperature Tr at that time and the target set temperature T2 are compared, and if there is a difference, the temperature calculation formula m,'2}
is corrected and returns to the beginning of the program from terminal A. In steps 901 to 903 for determining the stability of the inside air temperature Tr, the temperature difference ΔTr between the current inside air temperature Tr and the initial inside air temperature Tr(0) is first calculated in step 901, and the difference Δ is determined in determination steps 902 and 903. It is determined whether Tr is at, for example, 0±1°C.

When the temperature difference ΔTr for 2 minutes is within 0±1° C., it is considered that the temperature control using the temperature calculation formula is stable.

Then, in step 904, the temperature difference Y between the target set temperature L and the indoor temperature Tr is calculated, and in judgment steps 905 and 906, it is determined whether the temperature difference Y is within, for example, 0±1°C. do. When the temperature difference is 11 degrees Celsius or more, the correction term OF in the temperature calculation formula (which is set to 0 in the initial setting) is set to a smaller value by cf in order to further correct the temperature control pad 18 to the heating side position. . Also, the temperature difference Y is -1
When the temperature is above .degree. C., the correction term OF is made larger by cf in order to further correct the temperature adjustment damper 18 to a position on the cooling side. The value of cf may be approximately a value corresponding to a change in air temperature of, for example, 0.8°C. When the correction term CF is newly calculated in steps 907 and 908, the program returns to the beginning of the program (initial temperature reading routine) from terminal A, and when the damper coefficient is stabilized after at least 2 minutes, the internal air temperature Tr
The stability determination steps 901 to 903 are executed, and the temperature difference is again compared with the set temperature L in step 904.
is not within 0±1°C, the value of the correction term CF is further adjusted by c
Increase or decrease by f.

When the temperature difference Y is within 0±1°C, this indicates that the internal air temperature Tr has almost converged to the target set temperature L, and the program returns to the beginning of the program from terminal A, leaving the correction term CF unchanged. While the main step 64 is closed, each functional element of the air conditioner is repeatedly controlled according to the program described above. Even if the operating mode, temperature control set temperature, outside temperature, etc. change while the air conditioner is operating, the program repeats every few tens of milliseconds, so it will follow the changes with almost no delay. . In this embodiment, the convergence correction processing routine is executed approximately every two minutes, but this interval may be set to several tens of seconds to several minutes.

In addition, the judgment range for the temperature difference Y between the inside air temperature Tr and the set temperature L is made narrower than 0±100, and the increase/decrease range cf for the correction term CF is
By making the temperature smaller than 0.8 qo (temperature of the blown air), the accuracy of temperature control convergence can be improved. Further, the interval at which the convergence correction processing routine is executed may not be fixed to, for example, two minutes, but may be changed during the control.

For example, it takes extra time for the inside air temperature Tr to stabilize for a while after the air conditioner starts operating. The execution interval of the correction processing routine may be changed in the program according to the elapsed time from the start of operation or the temperature difference between the set temperature T2 and the inside air temperature Tr. As described above, the method for determining whether or not the
In addition to the discrimination based on the temperature difference between
Alternatively, a method may be used in which it is determined whether or not 8 has been in a stopped state continuously for a predetermined period of time.

Even if the increase/decrease value cf of the convergence correction term CF is constant,
It may be changed depending on the magnitude of the temperature difference between the inside air temperature Tr and the set temperature L.

[Brief explanation of drawings]

The attached drawings show an embodiment in which the present invention is applied to an automobile air conditioner, in which Fig. 1 is a block diagram of the entire system, Fig. 2 is an electrical wiring diagram of the electrical control system, and Figs. 3 and 4. is a detailed electrical wiring diagram of the previous calendar amplification circuit 110 shown in FIG.
5 and 6 are detailed electrical wiring diagrams of the on/off signal amplification circuit 150 shown in FIG. 2, FIG. 7 is a schematic diagram of temperature control, and FIG. 8 is a diagram of the microcomputer 100 shown in FIG. 2.
A flowchart diagram showing an outline of the control program by
9 to 14 and FIG. 16 are flowcharts showing details of each part of the control program shown in FIG. 8, and FIG. 9 shows an initial temperature reading routine 500, an analog signal reading and related processing routine 600, and FIG. , FIG. 10 shows the operation mode determination and related processing routine 700, FIG. 11 shows the processing routine following the air conditioner switch in FIG. Economic switch, processing routine following off, 13th
The figure shows the economical switch in Fig. 11, the processing routine following turning on, Fig. 14 shows the temperature calculation and the damper drive routine 800 based on it, and Fig. 16 shows the convergence correction processing routine 90.
FIG. 15 shows the 14th in the control program.
FIG. 17 is a block diagram showing the structural features of the present invention. 10... Ventilation duct, 13, 21, 22...
...Inside/outside air switching damper, outlet switching damper, and cooling mechanism, 15...Cooler, 16...
・Heater, 50, 51, 52, 53, 54, 55, 56
, 57... An electromagnetic clutch 50 serving as an actuating means,
and diaphragm actuators 51, 53, 56 and solenoid valve 52,
54, 55, 57, 60...Inside air temperature sensor serving as first signal generating means, 61...Outside air temperature sensor serving as second signal generating means, 63... - A microcomputer that includes a temperature setting device serving as a third signal generating means, 100...a storage means, a first processing means, and a second processing means. Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 2 Figure 7 Figure 8 Old Man 9 Figure Leopard 10 Figure 11 Figure 15 Figure 16 Figure 12 Figure 13 Figure Size Ship No. 17 figure

Claims (1)

[Claims] 1. A ventilation duct for supplying air toward the vehicle interior;
In this ventilation duct, there is a blower motor that generates an air flow toward the vehicle interior, and a heat exchange means that is arranged in the ventilation duct and includes a cooler and a heater, and the cooling effect of the cooler and the heating effect of the heater can be adjusted. In a vehicle air conditioner, the vehicle air conditioner further includes an actuating member for switching one or more air conditioning modes, the vehicle air conditioner generating a first signal in accordance with a vehicle interior air temperature. a first signal generating means; a second signal generating means for generating a second signal according to the temperature of the air outside the vehicle; and a third signal generating means for generating a third signal for changing the control target temperature of the air temperature inside the vehicle. a signal generating means; a storage means for repeatedly inputting and storing the first to third signals from the first to third signal generating means; a first processing means for repeatedly generating an adjustment signal indicating an adjustment amount for adjusting the cooling effect and the heating effect; a switching signal for switching the actuating member using the signal stored in the storage means; a second processing means for generating, and said first
an actuating means for independently operating the heat exchange means and the actuating member in response to an adjustment signal from the processing means and a switching signal from the second processing means, respectively. 2. The actuating member includes a first switching device that selectively switches air taken into the ventilation duct from inside the vehicle interior and outside the vehicle interior, and the second processing means includes the second The vehicle air conditioning control device according to claim 1, wherein a switching signal for the first switching device is generated using the signal and the third signal. 3. The actuating member includes a second switching device for switching between activation and deactivation of the cooler in the heat exchange means, and the second processing means is configured to control the second switching device stored in the storage means.
The vehicle air conditioning control device according to claim 1, wherein a switching signal for the second switching device is generated using the signal and the third signal. 4. A first switching device in which the operating member selectively switches air taken into the ventilation duct from inside the vehicle interior and outside the vehicle interior, and a second switching device that switches between activation and deactivation of the cooler in the heat exchange means. Claim 1 containing
The vehicle air conditioning control device described in 2. 5. The operating member includes a first switching device that selectively switches air taken into the ventilation duct from inside the vehicle interior and outside the vehicle interior, and a second switching device that switches between activation and deactivation of the cooler in the heat exchange means. The vehicle air conditioning control device according to claim 1, further comprising: a third switching device that selectively switches the blowing direction of air from the ventilation duct to the vehicle interior. 6. The first processing means includes gain applying means that applies a unique gain to each of the first to third signals, and an adjustment signal that synthesizes each gain-applied signal and indicates the adjustment amount. The vehicle air conditioning control device according to any one of claims 1 to 5, further comprising a synthesizing means for generating.