JPS6028685B2 - Vehicle air conditioning control device - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a vehicle air conditioning control system that selectively connects a cooling mechanism to a vehicle power source to adjust the cooling capacity, thereby reducing the operating rate of the cooling mechanism. The present invention relates to an air conditioning control device for a vehicle.

[Subordinate technology]

In a cooling mechanism for vehicle air conditioning control that includes a cold soot compressor driven by a vehicle engine, there is a demand for reducing the operating rate of the cooling mechanism.

Regarding the solution to this requirement, Japanese Utility Model Application No. 52-12946 is known. According to this known technique, it is proposed to determine whether to operate or stop the cooling mechanism by comparing the outside air temperature with a preset reference temperature. However, in the known technology, once the reference temperature that is compared with the outside temperature is set, it is not changed, so it is not possible to respond immediately to changes in the operating status of the air conditioner, and it is not possible to accurately grasp the truly necessary cooling function. It is difficult to further reduce the operating rate of the cooling function. [Object of the Invention] Accordingly, an object of the present invention is to provide a vehicle air conditioning control device that can reduce the operating rate of the cooling function based on accurate understanding of the cooling function.

[Summary of the structure of the invention]

In order to achieve the above object, the present invention includes a ventilation duct 1○ for sending air toward the vehicle interior VC, and an air flow directed to the vehicle interior VC through this ventilation duct 0', as shown in FIG. a blower motor 14 that generates a heat exchange means HEX whose effect can be adjusted; first signal generation means 61 that generates a first signal SI according to the temperature outside the vehicle;
Second signal S2 for setting the target set temperature in the vehicle interior
second signal generating means 63 for generating a temperature difference signal SD representative of the temperature difference, which is applied to a regulating means operatively coupled to said heat exchange means HEX for regulating said heat exchange effect; difference signal generating means, which generates the difference between the first signal SI and the second signal S2 as the temperature difference signal SD;
and an electric drive means that connects and connects the cooling mechanism 22 and the vehicle chassis power source 23 in response to the comparison result of the comparison means. do.

In the embodiment of the present invention, the comparison means and temperature difference signal generation means are constructed using a digital computer that executes instructions sequentially according to a preset control program.

A memory built into the digital computer is used as the temperature difference signal generating means. In the comparison means, it is preferable to add hysteresis to the comparison result, and for this purpose, the memory forming the temperature difference signal generation means is configured to generate two temperature difference signals representing two different temperature differences.

Further, in the device of the embodiment, the ventilation duct 1 is provided with an inside/outside air switching device that selectively takes in indoor air and outdoor air, and according to the comparative results of the comparison means, the cooling mechanism 22 is connected to the on-vehicle power source 23. When the indoor/outdoor air is disconnected, the indoor/outdoor air switching device is configured to move and operate to select outdoor air.

〔Effect of the invention〕

According to the present invention, since the outside temperature of the vehicle is relatively compared with the target set temperature for temperature adjustment inside the vehicle, when the target set temperature is relatively high and no cooling effect is required, the outside temperature is Even if the temperature is relatively high, the cooling mechanism can be stopped, and in this case, the temperature control performance is not impaired.

〔Example〕

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

This embodiment relates to an air conditioner 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 be controlled according to the following. In FIG. 1 showing the entire system, a ventilation duct 10
On the upstream side of the , there are an inside air inlet 11 as an air inlet (intake) for circulating inside air (indoor air) through the interior of the vehicle, and an outside air inlet 12 for taking in outside air (indoor air). 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 1 has a blower motor 14, a cooler 15 from the cold soot evaporator of the cooling cycle 22, a heater core 16 whose heat source is engine cooling water, and a blower motor 14. Heater 12
A damper 18 as a temperature adjusting member that adjusts the ratio of the air passing through the bypass passage 17 to the ventilation passing through the bypass passage 17 is arranged in this order. On the most downstream side of the ventilation duct 10, there is a ventilation duct 1.
Two types of air outlets 19 and 20 are formed for blowing out temperature-controlled air toward the vehicle interior.
One of the air outlets indicated by is an upper air outlet for blowing cold air toward the upper part of the vehicle interior, and the air outlet 20 is a lower air outlet for blowing warm air toward the lower part of the vehicle interior. The upper air outlet 19 and the lower air outlet 20 may each have a plurality of closing portions provided at appropriate locations within the vehicle interior and may be connected to each other by a duct. One of the upper and lower air outlets 19 and 201 is closed by the damper 21. Air outlet 19 by damper 21,
The selection of 20 is called balloon □ switching. Each element arranged in the ventilation duct 10 is subjected to temperature control by the temperature control damper 18 and air conditioning according to the driving mode preferred 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 very 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 operating 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 energy consumption and prevent the consumption of driving 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 bolt, a condenser 25, a liquid receiver 26, and an expansion valve 27 are piped to the cooler 15. This is a known structure in which the heat of the refrigerant is released in the condenser 25 and the heat of the air introduced in the cooler 15 is absorbed by the soot.

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 to release 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 heat exchange capacity of the heater 16 is adjusted by adjusting the amount of heat that passes through the heater 16 and the amount that passes through a radiator (not shown), 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 blowout □ switching and the damper 21 are electrically driven.

The electromagnetic clutch 50 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 it is energized via the power line 50a. The clutch is disengaged and the compressor 24 is stopped. The rotating state of the compressor 24 is called on, and the stopped state is called off. Driven by an actuator. 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 energized, negative pressure is supplied to the diaphragm actuator 53 to slowly pull the damper 18 in the direction of the arrow through the coupling mechanism 58a, and when the solenoid valve 55 is energized by the power line 55a, the diaphragm actuator 53 Atmospheric pressure is supplied to the damper 18, and the damper 18 is slowly pushed back by a spring (not shown).

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 degree of opening 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, and the solenoid valve 57 is driven by a power line 57a.
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 de-energized, atmospheric pressure is supplied to the diaphragm actuator 57, and the damper 21 is pushed back to the position shown in the figure by an imitation (not 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.

Further, the control device 1 is connected to various information input means for temperature control and control of each operation mode, and processes the input information based on a control program set internally in advance. Activate the control unit village. The blower motor 14 creates a flow of air within the rotated ventilation duct 10 when energized by the power supply line 14a.

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 air 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 air temperature sensor 61 that generates a signal according to the outside air temperature, a temperature sensor 62 that generates a signal that corresponds to the opening degree (position) of the temperature control damper 18, and a control device 1. There is an operation panel 2 installed near the.

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 for selecting operation or non-operation of the cooler 15, that is, the cooling cycle; An economical switch 67 for selecting operation and a short-time inside air switch (hereinafter referred to as a short-term inside air switch) 68 are provided to use the inlet as 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 temperature 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, a heat-sensitive resistance element such as a thermistor is used as the inside temperature sensor 60 and the outside air overflow sensor 61, and the analog voltage generated at its terminal when energized is connected to the control device 1 via the signal lines 6-oa and 61a. There is. Among the various switches on the operation panel 2, the air conditioner switch 65, the inlet changeover switch 66,
One end of the economical switch 67 and the short internal air switch 68 is grounded, and the other end is connected to the control device 1 via an open/close contact.The first three are operation memory type switches, and the remaining short internal air switch 68 is a self-reset type. It is a 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 sections 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 other ends of the power lines of the electric drive sections 52, 54, 55, and 57 are connected to the control device 1, and the power line 50a of the electromagnetic clutch 50 among the electric drive members is also connected to the control device. A power supply path is established via the control device 1. 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 described above, unless the main switch 64 is closed, the power supply to the blower motor 14 and the electrical drive member will not be established, 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 100 described in this embodiment is
This is a 1-bit one-chip module made by Fujitsu Limited that has built-in ROM, RAM, 1/0 board, timer, etc. in addition to the CPU. It is a microcomputer M old 8841. The MB8840 series user manual published by Fujitsu Limited can be used for its internal configuration, pin connections, handling, etc. The control device 1 is a microcomputer 100
and processing circuitry for operatively coupling the information input means and the electrical drive circuit. 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-D
A conversion circuit) 130 is used. Front layer amplifier circuit group 110
are separate front layer amplification circuits 111, 112, which 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 113 and 114. For elements whose total resistance changes, such as the inside air sensor 60 and the outside air sensor 61, the circuit shown in FIG. 3 is used as the front layer amplifier circuits 111 and 112. In FIG. 8, a resistor 111a is connected in series with an element 6' representing the inside air sensor 60 and the outside air sensor 61, and the voltage at the connection point, the variable resistor 11b, and the resistor 111c are connected in series.
The output voltage of the reference voltage generator consisting of
11d, and is configured to obtain an amplified voltage according to the difference between one voltage. In cases where the output signal is already a voltage signal, such as the damper opening sensor 62 and the temperature setting device 63, the circuit shown in FIG. 4 is used as the preamplifier circuits 113 and 114.
In FIG. 4, the damper opening sensor 62 and the temperature setting device 6
Voltage from element 6' representing element 3 and variable resistor 113a
and the output voltage of a reference voltage generator consisting of a resistor 113b are inputted to a differential amplifier circuit using an obea soap 113e, and an amplified voltage corresponding to the difference between the two voltages is obtained. In the two types of amplification circuits shown in FIGS. 3 and 4, the variable resistors 111b and 113a adjust the gain of the amplification to adjust the level of the input analog signal, and are operated by the microcomputer 10. Used to convert to an easier level. analog multiplexer 1
20 is an analog switch 121, 122, 123, 1
24 and an inverter 125 connected to its control gate,
126, 127, 128, inverter 125~
Each of the 128 input terminals is connected to pins Ro to R3 of input/output ports Ro to R, 5 of the microprocessor 100.

The analog multiplexer 120 connects the analog switches 121 to 1 in the order instructed by the microcomputer 100' (at this time, the output from the pin becomes 0 level).
24 are individually turned on, and the pre-counterfeit amplifier circuit 110
One output voltage is sequentially inputted to the A-D conversion circuit 130'. The A-D conversion circuit 13 consists of a voltage comparator 131 and a ladder type voltage generator 132. The input terminal of the ladder type voltage generator 132 is connected to the parallel output port Q of the microcomputer 100, and the voltage comparator The output terminal of 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.
The microcomputer 100 has parallel output ports 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.

The on/off signal amplification circuit 140 generates a binary and inverted voltage signal depending on whether one terminal of the switches 65 to 68 used for selecting the operation mode is at ground voltage due to contact closure or in an open state. Individual amplifier circuit 14
1, 142, 143, and 144, and each output terminal is connected to the non-latching input port Ko of the microcomputer 100.
~ Connected to K5. These amplifier circuits 141 to 14
4, as shown by reference numeral 141, when the switch contact is in the closed state, the transistor 141 is turned on and generates a 1-level signal at its collector, and when the switch contact is in the open state, the transistor 141 is turned on. It turns off and sets the collector to 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
1. Therefore, the electromagnetic clutch 5 as an electrical drive member
0, to switch between energization and de-energization of the solenoid valve 52 that drives the inside/outside air switching damper 13, the solenoid valves 54 and 55 that drives the temperature adjustment damper 18, and the solenoid valve 57 that drives the air outlet switching damper 21. 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 opposite directions, as shown in FIG. 5, for example. Furthermore, since the amplifier circuit 152 that operates the electromagnetic clutch 50 requires a large current output, a relay 152a is used as shown in FIG. The relay drive transistor 152b is operated via an 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 the microcomputer 00 is at the 0 level. The power supply circuit 170 supplies power necessary for the operation of the control device 1, and uses a known constant voltage power supply circuit 171 to generate a constant voltage power of 15 V from the terminal voltage of the battery 3 and supplies 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 provided as a circuit attached to the microcomputer 100'. When the ignition key switch 4 is closed and a voltage of 5V is applied, the startup circuit 180 initializes the microcomputer 100 by inputting a 0 level signal to the RESET terminal of the microcomputer 00 for a certain period of time. It has the function of During this microcomputer initialization, 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 I00 to constitute 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.

The conversion circuit 16 is configured as a decoder that converts the binary code sent from pins R, 2 to R, 5 of the input/output board of the microcomputer 100 into individual logical signals, so that the conversion circuit 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, we will explain the temperature control method and each operation mode. In FIG. 7 illustrating the operation of the air conditioner, a signal T2 indicating the set temperature and the inside temperature sensor 60 are shown.
The deviation detection unit 201 determines the deviation from the signal Tr indicating the measured value of the inside air temperature, and drives the temperature control damper 18 to raise or lower the temperature of the controlled object (vehicle interior air) 200 according to the deviation. 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 Damper 18 so that temperature Tr approaches set temperature L
Adjust the opening repeatedly. However, the controlled object 200
The heat load is not constant and changes depending on various factors.
Air conditioners for automobiles have problems with response delays in the control system, including delays in heat propagation among the 20 controlled objects.For example, it is not possible to maintain a constant internal temperature Tr in response to changes in the external temperature Tam. There's a problem. Therefore, by adopting predictive control, in other words, a disturbance element such as the outside temperature Tam is detected in advance, and a correction signal is applied to the deviation detection unit 201 at the same time that the thermal load of the controlled object 200 is affected by the disturbance. The inside air temperature Tr is maintained 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=K21K
．． ...■Here, the deviation △K
The opening degree of the temperature control damper 18 is controlled so that po converges within a certain predetermined range.

In the equation '1', the term Kr is the inside air temperature, and the term Ka is the outside air temperature.
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, when the temperature of the air after passing through the cooler 15 is not 0° C., it is used to correct the damper opening accordingly. This MF is expressed as a value obtained by multiplying the internal air temperature Tr by a predetermined constant if the operating mode is an internal air type, or by multiplying the external air temperature Tam by a predetermined constant if the operating mode is an external air type.
The correction term CF is a correction term that is determined in response to a deviation between the set temperature T2 and the inside air temperature Tr by comparing the set temperature T2 and the inside air temperature Tr in order to make the temperature control system accurately match the target set temperature T2. Note that, as will be described later, since the inside air temperature Tr is not constant in the initial state when the air conditioner starts operating, the correction term C
F is used for calculation after waiting for the internal air temperature Tr to stabilize. 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, correction terms 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 equation [1}. Gain constants are determined so that the terms Kr, Kam, KpopCF, and Mm in the above formula [1} are all 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 2, the temperature K to be controlled calculated using formula m is compared with the target temperature K2=T2, and the difference ΔKpo is taken out for driving the damper. In FIG. 7, which diagrams these calculations, the solid rectangular frame 211,
212, 213, 214, and 215 indicate gain calculations for each term performed in executing the above calculation, circles 201 and 205 indicate 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 power is supplied to the microcomputer 100, the control program starts executing at a start step 300. The startup circuit 18 then performs initialization, and an initialization routine 400 sets conditions that serve as the basis for program execution. Initial setting routine 400
This includes, for example, resetting the 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 lowering routine 500, an analog signal lowering and related processing routine 600, and an operation mode determination and related processing routine 700.
, temperature calculation and temperature adjustment damper drive routine based on it 8
00 and the convergence correction processing routine 900, and if the routine 500 is <, the routine returns to the routine 600, and this is repeated thereafter.

The time interval of this repeated processing (routines 600 to 8)
00 processing interval) is approximately several tens of milliseconds. Details of the processing temperature programming routine 500 and the analog signal conditioning and related processing routine 600 in FIG. 8 are shown in FIG. Further, operation mode determination and related processing routine 700 are shown in FIGS. 10 to 13, temperature calculation and temperature adjustment damper drive routine 800 based on it are shown in FIG. 14, and convergence correction processing routine 900 is shown in FIG. 16. . The numbers 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 numbers in FIG. 8. The initial temperature reading routine 500 and the analog signal input and related processing routine 600 will be explained with reference to FIG.

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 100 is explained in the user manual for the MB8840 series mentioned above, but in this embodiment, the overflow of the timer/counter as timer 1 is calculated by software (RA
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 lowered.

At this time, as described above with reference to FIG.
It is converted into a digital quantity via the D conversion circuit 130. Note that here, the output signal of the inside temperature sensor 60 and A-
○In order to have an appropriate correspondence relationship between the digital quantity obtained from the conversion circuit 130, the microcomputer 0
0' may be set and software processing may be performed.
Then, the obtained value indicating the inside air temperature Tr is stored in the RAM as the initial inside air temperature Tr(0). Next, in steps 601, 602, 603, and 604, the inside air temperature Tr, the outside air temperature Tam, the set temperature T2, and the temperature adjustment damper relationship Tpo are read, 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 reduced, the inside air temperature Kr calculated by calculating the predetermined gain Kr used for temperature calculation together with the digital quantity Tr is used for temperature calculation as a correction term when the compressor is turned off. A predetermined gain Q is calculated and used for correction calculations for selecting Mi and 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
The term Kam of the outside air temperature obtained by subtracting m is used for temperature calculation as a correction term when the compressor is turned off.

A term M obtained by calculating a predetermined gain Q, and a term Mki calculated based on a predetermined gain used in a correction calculation for selecting the upper and lower air outlets are calculated and stored in the RAM. When the set temperature T2 is lowered, the digital amount T2
Calculate the temperature as is, and use RA as the term K2 to be used for other purposes.
Store in M.

When the damper function 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
The air conditioner switch 65 and the air conditioner switch 67
is open (off) or closed (on) using pins Ko and K2 of the input board of the microcomputer 100.
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. (The judgment steps indicated by the diamonds are ``YES'' for horizontal flow and ``NO'' for downward flow.) Since the compressor 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
0 outputs a 1 level signal to pin R8 of the input/output boat with latch, this is amplified by the on/off signal amplification circuit 152, and outputted as a deenergization signal to the electromagnetic clutch 501.
If the electromagnetic clutch 50 was in the energized state before then, it is switched to the deenergized state, and if it was in the deenergized state, it remains as it is.
Next, microcomputer 10, routine 70
4, the signal level of pin K of the input boat is checked, and it is determined whether the suction port changeover switch 64 is set to OFF, indicating an internal air type, or ON, indicating an external 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 the internal/external air switching damper 13 is driven 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 parts of the air outlet, 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 30 CO or higher, the lower If the temperature is lower than the side outlet 20 or 30°C, the outlet switching damper 21 should be driven to switch to the upper outlet 19.
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 air 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, a term Mi related to the inside air temperature Tr is read out from the RAM and set as a correction term MF for temperature calculation.

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 T 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 rather than through the heating side 16 is increased). ), and the correction term MF is determined so that if the inside air temperature Tr is below 0° C., the heating side is driven further.
As mentioned above, Mi is calculated by multiplying the inside air temperature Tr by the gain constant Q, but the gain constant Q is calculated as a result of examining the relationship between the inside air temperature Tr, the damper function, and the temperature of the blown air at that time. Determined by experimental data. Note that this kind of correction is not necessary when the compressor is turned on, so the correction term M
``is set to 0. Steps 708, 709, and 710 perform arithmetic processing to determine the upper and lower positions of the air outlet.

If the combustor is turned on and the damper coefficient is, for example, 60%, a blowout air temperature of 30°C can be obtained.If the damper opening degree is greater or smaller than 60% and the outlet is switched between upper and lower positions, Air is automatically blown out to keep the head cold and feet warm, but simply switching the outlet depending on the damper function when the compressor is off would result in a constant blown air temperature, e.g. 30q.
It is not possible to switch the outlet by adjusting the temperature of the intake air, and the relationship between the damper opening degree and the outlet air must be corrected depending on the temperature of the intake air. In step 708, the correction term Ms
A value Msi obtained by multiplying the inside air temperature Tr by a gain constant of 8 is selected as the value Msi. Then, in step 709, the damper opening degree s indicating the switching point of the air outlet is corrected. Here, D is the temperature of the outlet air that is the boundary for switching the outlet when the compressor is turned on. For example, 3000 is a value indicating the damper opening degree, for example 60%. Next, in step 71, it is determined whether the actual damper function Kpo is larger than the damper opening degree s, which is the switching point of the air outlet. In order to blow out the wind, a de-energizing command for the solenoid valve 57 is output and the switching damper 2 is activated.
1 to open the lower outlet 20. When the actual damper opening degree Kpo is 4 points below the boundary value s in step 710, an energizing command for the solenoid valve 57 is output in order to blow cold air mainly to the upper body of the occupant in step 712, and the switching damper is activated. 21 to open the upper 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
At step 16, when it is determined that 10 minutes have elapsed, the numerical value stored in this RAM is deactivated. In the case of the outside air type, first in step 717, the inside/outside air switching damper 1 is
A de-energizing command signal for the solenoid valve 52 is output to release the solenoid valve 3 to the outside air inlet 12. Next, a correction term MF for temperature calculation is determined as Mb', which is obtained by multiplying the outside air temperature ram by the gain constant y. Next, in steps 719, 720, and 721, the damper function s determines the upper and lower positions of the air outlet in the same way as in the internal air type.
is the value Msx obtained by multiplying the outside temperature Tam by a constant gain constant.
Compare this with the actual damper opening Kpo,
Determine the top and bottom of the air outlet. In steps 722 and 723, in accordance with the determination, the solenoid valve 57 is commanded to be deenergized or energized in order to drive the outlet switching damper 21. 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 economy 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 external air type, or a short time internal air type, and according to the determination, the internal/external air switching damper 18 is controlled, and the air outlet is switched according to the relationship of the temperature control damper. Execute. Details of the routine 725 will be explained with reference to FIG.

When the cooling cycle is operated in step 724, the temperature calculation correction term M' is set to 0 in step 726, and in judgment steps 727 and 728, the on/off status of the suction port changeover switch 66 and the short internal air switch 68 is checked, and the 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 outlet air can be determined by the function Kpo, and therefore, the damper opening degree D (generally about 60%) corresponding to the outlet air temperature of 30qC is set as the damper function s indicating the switching point of the outlet. The upper and lower positions of the air outlet are determined by comparing with the actual relationship, and the energization and deenergization of the solenoid valve 52 is controlled.

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, compare the target set temperature T2 and the inside air temperature Tr to determine whether it is necessary to obtain a large cooling effect due to cool down, that is, a sudden cooling start-up. When a cool down is necessary, the air conditioner is operated in the normal mode with the compressor turned on according to line b until the 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, , the set temperature T according to line b
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 T2 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 economical operation mode will be explained in detail with reference to FIG. 13.

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 an outside air type, the inside/outside air switching damper 13 is set to outside air intake in Step 744, and in the case of a short-time inside air type, the inside air is turned on for 10 minutes by timer processing steps 745, 746, and 746a. After the IQ minutes have passed, the outside air method will be used. Short-time internal air processing steps 747, 748, 749, 750, 7
51, 751, and 753 are almost the same as the control when the combustor 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 short-time internal air type or external air type, drive command signal for suction port switching damper 13 Steps 743 and 744
After outputting the output, a cool-down necessity determination routine consisting of steps 754, 755, and 756 is executed. In step 754, the temperature difference P between the set temperature T2 and the inside air temperature Tr is calculated, and if this temperature difference P is smaller than a predetermined temperature difference B, for example 1.6°C, in step 755 cool down is not required (“Yes ), and the temperature difference P is determined to be the temperature difference B+
If b is smaller than, for example, 2.600, step 756
It is determined that no cool down is necessary (“No”), and the temperature difference P
For example, when the
The compressor shown in the figure moves to control in the normal operation mode when it is on. 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 performed in steps 757, 758, 759, and 76 to determine whether the target set temperature T2 can be obtained without operating the cooling cycle.
Executed at 0.

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 inside air temperature Tr to the target set temperature without operating the cooling cycle, outside air must be introduced and the outside air temperature Tam must be adjusted.
must be sufficiently lower than the set temperature T2. In this embodiment, in step 757, the set temperature T2 and the outside air temperature Ta are
Calculating the temperature difference R with m, the temperature difference R is, for example, 7 degrees Celsius or more when the cooling cycle is stopped (compressor off), and 7 degrees Celsius or more when the cooling cycle is running (compressor on).
When it is lower, for example, 1oo○ or more, it is determined that the cooling cycle may be stopped (capable). When the temperature difference R is smaller than the above value, it is determined that there is no capacity, 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, a deenergization command signal for the electromagnetic clutch 50 is output in step 761 to stop the cooling cycle, and in step 762 the electromagnetic valve 52 is turned off. A de-energization command signal is output to switch the inside/outside air switching switch 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 similar to step 718 to step 72 in FIG.
It is the same as up to 3. Next, a temperature calculation for driving the temperature adjustment damper 18 and a damper driving routine based on the temperature calculation will be explained with reference to FIG.

In steps 801 and 802, first, the temperature calculation formula m,
■Calculate. Among the terms necessary for this calculation, K2, Kr,
Kam and Kpo are stored in RAM by analog signal logic and related processing routines (see Figure 9).
MF is determined by the operation mode determination and related processing routine (see Figures 10 to 13), and OF is set to 0 in the initial setting routine, and step 80
1,802 simply reads these values from RAM and calculates them. △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. , indicates the deviation from the target set temperature K2 (=T2) set by the temperature setting device 68.

Next judgment step 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 810, the solenoid valve 55 is energized to drive the damper 18 in a direction in which the temperature of the blown air is reduced. 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 to maintain the energization or switch to de-energization based on the magnitude of the deviation ΔKpo. Further, when neither of the solenoid valves 54 and 55 is energized, steps 805 and 806 are performed. It is determined 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.

Then, when the solenoid valve 55 involved in temperature rise switches from deenergized to energized, the process proceeds from the 1° C. determination step 807 to the switching step 811, and conversely, when it switches from energized to deenergized, the process advances to 0.6° C. From the determination step 806 to the switching step 80
Proceed to 9. Further, when the electromagnetic valve 54 involved in temperature reduction is switched from energized to deenergized, the process proceeds from the -0.4 qo determination step 810 to the 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℃~0.6q
When o is "approximately 0", both electromagnetic valves 54 and 55 are deenergized. If either of the solenoid valves 54, 55 is energized, the temperature control damper 18 is in operation, which means that the temperature control is not yet stable, so the branch end C
Analog signal reading and related processing routine 60
Returns to 0 (see 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 is performed in the initial temperature programming 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 point C and returns to the analog signal introduction and related processing routine 60. That is, once the initial temperature reading routine 500 is passed, the analog signal lowering and related processing routine 600 and the operation mode determination and related processing routine are executed for at least two minutes and until both the solenoid valves 54 and 55 are energized. 700, and the temperature calculation and the temperature adjustment damper driving routine 800 are repeatedly executed based on the temperature calculation. In addition, in a general air conditioner, the function of the temperature control damper 18 is stabilized in 2 minutes unless there is a large change in the outside air temperature Tam or the like. If both the solenoid valves 54 and 55 are deenergized and two minutes have elapsed since reading the initial internal air temperature Tr(0), the process moves from determination step 812 to the convergence correction processing routine shown in FIG. .

In the convergence correction processing routine, temperature calculation and based on the temperature calculation (as a result of the processing of the temperature control damper drive routine 800),
When the temperature control damper 18 stops and the temperature of the blown air becomes stable, steps 901, 902, and 903 determine the internal air temperature Tr (read in the analog signal reading and related processing routine 600) from the RAM and use it. ) is compared with the initial temperature Tr(0) at the time of starting the timer 1, 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 the process is performed again from the initial temperature lowering routine 600. If the inside air temperature Tr is approximately the same for 2 minutes, the calculation formula {U, {
It is considered that the temperature control by No. 21 is stable. Next, in steps 904, 905, 906, 907'908, the internal air temperature T at that time is compared with the target set temperature T2, and if there is a difference, the temperature calculation formula '1},'
Correct 2- and return to the beginning of the program from terminal A. In internal air temperature Tr stability determination steps 901 to 903,
First, in step 901, the temperature difference △Tr between the internal air temperature Tr at that time and the initial internal air temperature Tr (0) is calculated, and in judgment steps 902 and 903, the difference △Tr is, for example, 0±1°C.
Determine whether or not it exists.

When the temperature difference ΔTr for 2 minutes is within 0°C to 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 1100 or more, in order to further correct the temperature adjustment damper 18 to a position on the heating side, the correction term OF (initial setting is set to 0) in the temperature calculation formula is set to a smaller value by cf. Also, the temperature difference Y is -
When the value is 100 or more, the correction term OF is increased 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, for example, by 0.800. Steps 907, 90
When the correction term CF is newly calculated in step 8, the process returns to the beginning of the program (initial temperature reading routine) from terminal A, and when the damper function is stabilized after at least 2 minutes, stability determination steps 901 to 901 of the internal air temperature Tr are performed. Step 903 is executed, and the temperature difference Y is again compared with the set temperature L in step 904. If the temperature difference Y is not within 0±1° C., the value of the correction term CF is further increased or decreased by cf.

When the temperature difference Y is within 0°C to 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 switch 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 set to be narrower than 0±1°C, and the increase/decrease range cf of the correction term CF is set to 0. By making the temperature smaller than 0 (the 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 the drawing]

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.
FIG. 9 is a flowchart showing an outline of the control program shown in FIG. 8, and FIG. A routine 500, analog signal reading and related processing routine 600, FIG. 10 shows a driving mode determination and related processing routine 700, FIG. 11 shows a processing routine following the air conditioner switch and turning off in FIG. 10, and FIG. The air conditioner switch in Figure 11 is turned off and the processing routine following the air conditioner switch turned off, the first
3 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 9.
00, respectively, and FIG. 15 shows the first part of the control program.
FIG. 4 is a hysteresis characteristic diagram in damper drive for explaining the routine, and FIG. 17 is a block diagram showing the structural features of the present invention. 1... Control device, 10... Ventilation duct, 1
4...Prower motor, 15...Cooler, 1
6... Heater, 18... Damper as a temperature control member, 22... Cooling mechanism, 23... Engine (vehicle beating power source), 50... Electromagnetic clutch (electrical driving means), 61... outside air temperature sensor (first signal generating means), 63... temperature setting device, 100...
...Microcomputer. Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 2 Figure 7 Figure 8 Figure 15 Figure 16 Figure 9 Figure 10 Figure 17 Figure 11 Figure 12 Figure 13 Dimensions ship

Claims (1)

[Scope of Claims] 1. A ventilation duct for sending air toward the vehicle interior, a blower motor that generates an air flow toward the vehicle interior in the ventilation duct, a heater disposed in the ventilation duct and a vehicle-mounted power source. a cooler having a driven cooling mechanism, a heat exchange means that exchanges heat with the air flow and is capable of adjusting the heat exchange effect; and a heat exchange means that generates a first signal according to the temperature outside the vehicle interior. a first signal generating means;
second signal generating means for generating a second signal for setting a target set temperature in the vehicle interior and applying it to a regulating means operatively coupled to the heat exchange means for adjusting the heat exchange effect; , temperature difference signal generation means for generating a temperature difference signal representing a temperature difference, comparison means for comparing the difference between the first signal and the second signal with the temperature difference signal, and a comparison result of the comparison means. An air conditioning control device for a vehicle, comprising: an electric drive means that receives the cooling mechanism and connects and connects the cooling mechanism and the vehicle-mounted power source. 2. Claim 1, wherein the temperature difference signal generating means is configured to generate two temperature difference signals representing two different temperature differences in order to add hysteresis to the comparison result in the comparing means. The vehicle air conditioning control device described in .