JPH0642802A - Controller for air conditioner - Google Patents

Abstract

PURPOSE:To facilitate the setting and alteration of characteristic data even for different air conditioners and generalize a microcomputer substrate by employing an auxiliary ROM in which there are stored inherent data indicative of functions of air conditioners and capabilities of a compressor and a fan being mounted. CONSTITUTION:In a separate type air conditioner where there are separated an indoor unit and an outdoor unit, there are provided in each unit a ROM in which programs for controlling the operations of instruments mounted on the unit, a RAM in which various data are stored, and microcomputers 14, 41 each including a CPU for execution of the program accomodated in the same package. There are further provided auxiliary ROMs 30, 50 in which there are stored data concerning the operations of the instruments in each unit and data inherent to each unit. The microcomputers 14, 41 control the operation of the air conditioner based upon various data and the inherent data. Accordingly, functions of the air conditioner are altered by changing the contents stored in the auxiliary ROMs 30, 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner.

[0002]

2. Description of the Related Art In recent years, air conditioners have become widespread in offices, homes, vehicles, etc., for adjusting indoor temperature, humidity, or ventilation to make them comfortable. Taking a so-called air conditioner for home use as an example, it detects the outside air temperature and room temperature, controls the blowout air temperature and air volume so that the room temperature reaches the desired temperature as quickly as possible, and cools and heats according to the user's request. There are various functions such as controlling the driving ability so that the ability can be obtained, adjusting the blowing direction of the cold and hot air, and making the hot and cold air blow out without waiting too much when necessary, Various models have been developed that have different functions selected according to the user's request.

[0003]

The control of an air conditioner is usually performed by a microcomputer, and for different models, data relating to the function, capability or characteristics of each model (hereinafter referred to as "unique data") is preset. This was done by manufacturing a dedicated microcomputer (for example, Japanese Laid-Open Patent Publication No. 3-9164).
No. 4). However, as the needs of users have diversified, the number of models has increased, and even with a home air conditioner as an example, there are several tens of models.
Although the models are currently on sale, it is disadvantageous in terms of design and manufacturing, and cost is increased to manufacture a dedicated microcomputer according to different models or capabilities for each model.

The present invention has been made in view of the above points. It is easy to set and change the characteristic data even for different models of air conditioners, and it is possible to generalize the microcomputer board to reduce the cost. The purpose is to

[0005]

The present invention has a refrigeration cycle in which a compressor, an outdoor heat exchanger, a pressure reducing device, and an indoor heat exchanger are connected by a refrigerant pipe, and a device such as a compressor or a blower is provided. In a control device for controlling the equipment of an air conditioner configured to control and supply air whose temperature is controlled by an indoor heat exchanger to a room to be conditioned, the air conditioner is at least a compressor and an outdoor heat exchanger. A main ROM storing a program for controlling the operation of equipment mounted on the outdoor unit such as a compressor, which is separated into an outdoor unit having a compressor and an indoor unit having at least an indoor heat exchanger,
RAM for storing various data, C for executing programs
The outdoor unit side microcomputer that stores the PU in the same package and the outdoor unit side auxiliary ROM that stores unique data of the outdoor unit such as the capacity of the compressor and the capacity of the outdoor heat exchanger are provided. The indoor unit controls the operation of the equipment based on the data and unique data, and the indoor unit stores the main ROM that stores the program for controlling the operation of the equipment installed in the indoor unit such as the blower, the setting data and various data according to the operation. A RAM for storing and a CPU for executing programs stored in the same package, the indoor unit side microcomputer, the capacity of the indoor side heat exchanger,
The indoor unit side auxiliary ROM that stores the unique data of the indoor unit such as the variable width of the air blower is provided, and the indoor unit side microcomputer controls the operation of the device based on the setting data, various data and the unique data, and the outdoor unit side microcomputer. The indoor-side microcomputer is connected by a signal line so that data can be transmitted and received to and from each other, and both the microcomputers transmit and receive data and control signals to operate the air conditioner.

[0006]

When such a control device is used, the function of the air conditioner can be obtained by using the auxiliary ROM in which the unique data indicating the function of the air conditioner and the capacity of the installed compressor, blower, etc. is stored. The operation control can be performed according to the capacity of the compressor, the blower and the blower.

That is, the same control device can be used by replacing the auxiliary ROM even if the function of the air conditioner and the capabilities of the compressor, the blower, etc. mounted therein are different.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 2, the air conditioner comprises a unit 1 (hereinafter referred to as an indoor unit) arranged indoors and a unit 2 (hereinafter referred to as an outdoor unit) arranged outdoors. Are connected by a power line 100 and a communication line 200.

Further, the indoor unit 1 is equipped with an indoor heat exchanger 1a, and the outdoor unit 2 is equipped with an outdoor heat exchanger 2
a, a compressor 2b, a pressure reducing device (electric expansion valve) 2c, and a four-way valve 2d are mounted, and these constituent elements are refrigerant pipes 3
00 to form a refrigeration cycle.

FIG. 1 shows a control circuit of an air conditioner according to the present invention. The circuit part on the left side of the dashed line drawn in the center of the drawing is the control circuit provided in the indoor unit 1, and the circuit part on the right side is the outdoor unit. 2 is a control circuit provided in
They are connected by the power line 100 and the communication line 200 shown in FIG.

Now, in the control circuit of the indoor unit 1, a rectifying circuit 11 for rectifying 100V AC supplied from the plug 10 and a DC fan motor (Braless motor) (M1) 16 for blowing cold / hot air indoors. Depending on the signal from the microcomputer 14, the voltage of the applied DC power is 10 to 36
Power supply circuit 12 for motor to be changed to (V) and microcomputer 14
A control power supply circuit 13 for generating a DC power of 5V for
Microcomputer 1 based on DC fan motor rotation position information
Motor drive circuit 15 for controlling the energization timing of the stator windings of the DC fan motor 16 in response to the signal from
And ON / O provided on the operation panel of the indoor unit 1.
A switch board 17 provided with an FF switch, a trial run switch, etc., a receiver 18a for receiving a remote operation signal (ON / OFF signal, air conditioning switching signal, room temperature set value signal) from the wireless remote controller 60, and an air conditioner. Is provided with a display plate 18 for displaying the operating state of the above, and a flap motor (M2) 19 for moving a flap for varying the blowing direction of the cold and warm air.

Further, a room temperature sensor 20 for detecting room temperature
A heat exchanger temperature sensor 21 for detecting the temperature of the indoor heat exchanger 1a, and a humidity sensor 22 for detecting indoor humidity. The microcomputer 14 A / D converts the detection values of these sensors. Take in. On the other hand, the control signal from the microcomputer 14 to the outdoor unit 2 is transmitted through the serial circuit 23 and the terminal board T3. Separately, a signal from the microcomputer 14 controls the triac 26 and the heater relay 27 via the driver 24, thereby phase-controlling the energization of the reheating heater 25 during dehumidification.

Reference numeral 30 denotes an external ROM storing "unique data" for specifying the model and various characteristics of the air conditioner,
The unique data stored in the external ROM 30 (auxiliary ROM) is as follows.

(1) Distinguish between indoor unit and outdoor unit (2) Development year (3) Development change history (4) Distinction between large and small (5) Manufacturing serial number (6) Corresponding remote control type (7) Cooling only (8) Presence / absence of heater, presence / absence of humidity sensor (9) Unit capacity (10) Presence / absence of remote controller address (11) Heating and cooling rated frequency (12) Maximum heating frequency (eg 105 to 180 Hz) ( 13) Flap angle position (14) Swing range of flap during cooling and heating (15) Maximum voltage control rotation speed of fan motor (16) Data check code Power is turned on from the external ROM 30 that stores these unique data. Immediately after and immediately after the operation is stopped, this unique data is taken in. When the power is turned on, command input from the wireless remote controller 60, operation to be described later, and detection of the state of the trial run switch are not performed until the acquisition of the unique data from the external ROM 30 is completed.

Next, the control circuit of the outdoor unit 2 will be described.

The outdoor unit 2 includes terminal plates T1 ', T1', which are respectively connected to the terminal plates T1, T2, T3 of the indoor unit 1.
T2 'and T3' are provided. 31 is a varistor connected in parallel to the terminal boards T1 'and T2', 32 is a noise filter, 34 is a reactor, 35 is a voltage doubler circuit, 36 is a noise filter, and 37 is a voltage doubler generated by the voltage doubler circuit 35. This is a smoothing circuit for smoothing, and a DC voltage of about 280 V can be obtained from an AC of 100 (V).

Reference numeral 39 is a serial circuit for converting the control signal from the indoor unit 1 input from the terminal board T3 'to the microcomputer 41, and 40 is the outdoor unit 2
Current supplied to the microcomputer 41 after being detected by the current transformer (CT) 33 to be smoothed to a DC voltage and supplied to the microcomputer 41, 41 is a microcomputer, and 42 is a switching power supply for generating a power supply voltage for the microcomputer 41. Circuit. Reference numeral 38 denotes a motor control circuit that PWM-controls energization to a compressor 43, which will be described later, based on a control signal from the microcomputer 41. Six power transistors are connected in a three-phase bridge shape to form a so-called inverter device. There is. 43
Is a compressor motor that drives the compressor of the refrigeration cycle, 44 is a discharge temperature sensor that detects the refrigerant temperature on the discharge side of the compressor, and 45 is a fan motor that is regulated to the third speed, and blows air to the outdoor heat exchanger 2a. To do. Reference numerals 46 and 47 are a four-way valve and a solenoid valve for switching the flow path of the refrigerant in the refrigeration cycle.

Further, the outdoor unit 2 is provided with an outside air sensor 48 for detecting the outside air temperature in the vicinity of the intake port, and a heat exchanger temperature sensor 49 for detecting the temperature of the outdoor heat exchanger 2a. And these sensors 4
The microcomputer 41 A / D converts the detected values of 8 and 49 and fetches them.

Reference numeral 50 denotes an external RO in the indoor unit 1.
An external ROM having the same function as M30, which stores unique data for the outdoor unit 21 similar to that described for the external ROM 30.

The symbol F shown in the control circuit of the indoor unit 1 and the outdoor unit 2 indicates a fuse.

The microcomputer 4 (control element) contains a ROM in which a program is stored in advance, a RAM for storing reference data, and a CPU for executing the program in the same package (U879J manufactured by Intel Corporation).
P).

3 and 4 are actual wiring diagrams centering on the microcomputer 14 of the control circuit of the indoor unit 1 in the electric circuit of the air conditioner shown in FIG. 3 shows the wiring on the left side of the microcomputer 14, and FIG. 4 shows the wiring on the right side of the microcomputer 14. FIG. 3 and FIG. In the figure, the same components as those in FIG. 1 are designated by the same reference numerals.

Referring to FIG. 3, the microcomputer 14 outputs control data to be sent to the outdoor unit 2 from the port P1 and gives it to the serial circuit 23 via the buffer 101. The serial circuit 23 outputs the control data to the signal line 200 connecting the indoor unit 1 and the outdoor unit 2. When receiving the control data from the outdoor unit 2, the microcomputer 14 inputs from the port P2 via the communication line 200, the serial circuit 23, and the buffer 102. The serial circuit 23 uses a photocoupler to input control data between the communication line 200 and the buffer 101102.

The output ports P3 to P6 are the flap motor 1
9 drive signal is output. A step motor is used as the flap motor 19, and output ports P3 to P
The rotation angle of the flap motor 19 can be changed by energizing the coil of the flap motor 19 with the signal output from 6. The signals output from the ports P3 to P6 are power-amplified by the buffer 19a until the coil of the flap motor 19 can be energized.

The output port P11 outputs the firing signal of the triac 26, and the output port P17 is the heater relay 27.
And a signal for controlling the energization of the buzzer 103 are output from the output port P18. The power of each of these signals is amplified by the buffer 19a.

The output port P19 outputs a DC voltage signal applied to the fan motor 16. This DC voltage signal is composed of a pulse train with a varied pulse width duty. This pulse train is converted into a DC voltage by the conversion circuit 104. This DC voltage is applied to the motor power supply circuit 12. The motor power supply circuit 12 supplies DC power of a voltage corresponding to this DC voltage to the motor drive circuit 15. Therefore,
The voltage supplied to the motor drive circuit 15 can be changed by changing the duty of the pulse train output from the port P19. As will be described later, the fan motor 16 has a DC
A motor drive circuit 1 is used because a brilliance motor is used.
If the voltage supplied to 5 is changed, the rotation speed of the fan motor 16 can be changed.

The conversion circuit 104 is mainly composed of a transistor, a resistor and a smoothing capacitor.

The input port P21 inputs a signal for controlling the energization timing of the fan motor (three-phase brushless motor) 16. This signal is obtained when the current flowing through each stator winding of the three-phase brushless motor changes in polarity with the neutral point as a boundary, and is obtained six times for one rotation of the motor. A circuit for obtaining this signal is incorporated in the motor drive circuit 15 (hybrid ICKA160 manufactured by Sanyo Electric Co., Ltd.). Further, the motor drive circuit 15 includes an inverter circuit in which six power transistors are connected in a three-phase bridge shape, and a switching circuit for performing high-speed ON / OFF of these power transistors (mainly between the base and emitter of the power transistors). A circuit for shortening the discharge time of accumulated charge) is incorporated.

Therefore, the fan motor 16 can be rotated by sequentially turning on / off the power transistor according to a predetermined ON / OFF combination in accordance with the rotation angle of the rotor of the motor. This ON / O
The ON / OFF signal of each power transistor based on the combination of FF is output port P22 of the microcomputer 14.
Is output from P27.

The microcomputer 14 performs a predetermined calculation from the signal (time between signals) input from the port P21 to determine the rotation angle of the rotor, and then outputs an ON / OFF signal corresponding to this rotation angle. Output from the ports P22 to P27 to the motor drive circuit 15.

Next, referring to FIG. 4, the output of the room temperature sensor 20 is output to the port P51 of the microcomputer, the output of the heat exchanger temperature sensor 21 is output to the port P50, and the illuminance detection sensor 105 (Cds) is output to the port P49. Output is port P48
The output of the humidity sensor 22 is output to. These outputs are A / D (analog / digital) converted at ports P51, P50, P49 and P48 and then stored as data in the RAM of the microcomputer 14. The switch board 17 has contacts C1 to C1 for complete stop, operation, trial operation, failure diagnosis, etc.
C4 is provided so that the slider 17a can slide left and right by manual operation. The potentials of the contacts C1 to C4 are given different potentials in four stages by the resistors 106 to 108 and the voltage of 5 (V). Therefore, by determining this potential at the input port P47 (A / D conversion input port), it is possible to determine which contact the slider 17a is in contact with. Fault diagnosis switch 108
Is connected to the port P45 of the microcomputer 14. The remote control signal received by the receiver 18a is input to the port P42 of the microcomputer 14, and a signal for turning on the light emitting diode 18b that indicates operation, automatic cooling, automatic heating, and dehumidification is output from the ports P36 to P41 to the display board 18. To be done.

An external ROM 30 is connected to the ports P34, P35 and P44 of the microcomputer 14, and the microcomputer 1
4 reads out the above-mentioned unique data stored in the ROM 30 as needed.

When reading the unique data, the microcomputer 14
As shown in FIG. 5, after resetting the external ROM 30 with a signal output from the port P34, a clock is output from the port P35, data is input from the port P44 according to the clock, and the data is stored in the internal RAM. External ROM3
0 is a sequential read-only memory (O
ne time programmable sequential read only memory)
Is used, for example, MB85419P made by Fujitsu is used.

FIG. 6 is a flow chart showing the main operation of the microcomputer 14.

In this figure, in step S1, the plug 1
When 0 is connected to an outlet and power supply is started, the microcomputer 14 is first initialized in step S2. Next, in step S3, the data stored in the auxiliary ROM 30 is read out and stored in the RAM in the microcomputer 14. This procedure is performed by the auxiliary ROM 30 as described above.
After a reset signal is given to the port, a pulse is output every predetermined period, and the data in response to the output of this pulse is output to the port P4.
It is taken in from 4 and sequentially stored in RAM.

Next, in step S4, the sensor 20
Input detections of ~ 22 and 105, and input the data to R
Store in AM. Similarly, which terminal the switch 17a is in contact with is determined from the voltage applied to the port P47, and the data indicating the contacting terminal is stored in the RAM. When a signal (driving information) from the remote controller 60 is input, the program is interrupted by receiving the received signal to the port P42, and the series of received driving information is divided into respective data and stored in the RAM. To be done.

In steps S5 and S6, it is determined whether the air conditioner is in operation, whether the air conditioner has changed from running to stop, and whether the air conditioner is in stop. If it is running, go to step S7. Then, the operation based on the data stored in the RAM is performed. For example, when the switch 17a is at the operation (C2) terminal and the heating operation is performed, the lamp for displaying the heating is first turned on and the operation of the compressor is controlled based on the room temperature and the set temperature. (For example, data that sets the operating capacity of the compressor is transmitted to the outdoor unit).

Microcomputer 41 of the control circuit of the outdoor unit 2
The description is omitted because it is almost the same.

In the air conditioner thus configured, for example, in model A, the type of the corresponding remote controller is "VR",
It has a heating and cooling function, without an electric heater and humidity sensor,
The unit has a capacity of 2500 Kcal, and the type B of the corresponding remote controller is "VS" for model B (VS can transmit operation information of more functions than VR, and can perform many functions of the air conditioner. It has a cooling and heating function, an electric heater and a humidity sensor, and the unit capacity is 2800 Kcal. Similarly, there are C model, D model ...

The difference between these models is mainly the number of functions provided and the unit capacity of 2000 Kcal and 2500 Kca.
1, 2800 Kcal, 3200 Kcal, etc.
Therefore, there are as many models as a combination of these, but the functions to be enabled are selected, and according to the capacity of the indoor unit (if the operating capacity of the compressor required for the outdoor unit is changed, multiple controllers can be operated with a single control device). You can control the model.
That is, the control device of the present invention can perform control corresponding to each model by setting the unique data stored in the auxiliary ROM according to each model.

7 and 8 are actual wiring diagrams centering on the microcomputer 201 of the control circuit of the outdoor unit 2 in the electric circuit of the air conditioner shown in FIG. 7 shows the wiring on the left side of the microcomputer 201, and FIG. 8 shows the wiring on the right side of the microcomputer 201. FIG. 7 and FIG. 8 are integrated to form the entire physical wiring diagram. In the figure, the same components as those in FIG. 1 are designated by the same reference numerals.

Referring to FIG. 7, the microcomputer 201 outputs the control data to be sent to the indoor unit 1 from the port P1 and gives it to the serial circuit 39. The serial circuit 39 uses the signal line 20.
It transmits to the indoor unit 1 via 0. When receiving the control data from the indoor unit 1, the signal is received via the signal line 200 and the serial circuit 39.

The port P4 is a carrier wave output terminal and outputs the carrier wave to the runaway detection circuit 202 of the microcomputer 201. The carrier wave is used to generate an ON / OFF signal for generating a pseudo sine wave for driving the compressor 43 based on the PWM theory, and is output while the ON / OFF signal is normally generated. It In addition, this ON / OF
The F signal is output from the ports P6 to P11.

The runaway detecting circuit 202 outputs a signal to the port P5 of the microcomputer 202 and shuts off the power supply to the photocouplers 203 to 208 if the carrier wave is not supplied for a certain period of time.

The connectors 209 and 210 supply ON / OFF signals and driving power to the motor drive circuit 38. When an abnormality occurs in the motor drive circuit 38 (temperature abnormality, current abnormality, etc.), a signal is output to the photocoupler 211 and this signal is transmitted to the port P5 of the microcomputer 201.

Reference numeral 212 denotes a buffer circuit, which is the microcomputer 20.
The ON / OFF signal output from 1 is power-amplified and output to the photocouplers 203 to 208.

The switching power supply circuit 42 is a power supply for driving the switching elements of the motor drive circuit 38,
Power supplies of -12 [V] and -5 [V] are generated.

Referring to FIG. 8, 213 is a C.I. T. 33 is a connector to be connected. In the current detection circuit 40, C.I.
T. The AC current detected by 33 is converted into a DC voltage and output to the port P17 (analog input port) of the microcomputer 201.

Reference numerals 214 to 216 respectively indicate the discharge temperature sensor 4.
4, a connector to which the outside air sensor and the heat exchanger temperature sensor 49 are connected. The respective detected values are converted into DC voltage and then output to the ports P14 to P16 (analog input port) of the microcomputer 201.

Ports P19 to P22 are control signal output terminals of the equipment, and the respective control signals are transistors 217 to 217.
RV, SV, R1, R shown in FIG.
2, output to R3. In FIG. 7, reference numeral 221 is a triac, which controls energization (switching) of the four-way valve 46 connected to the connector 222.

Reference numeral 223 is a triac, which is a connector 2
The energization (open / close) of the solenoid valve 47 connected to 24 is controlled. 225 is an auxiliary relay having a switching contact piece 231;
6 is an auxiliary relay having a switching contact piece 230, 227 is an auxiliary relay having an opening / closing contact piece 229, and these auxiliary relays 225 to 227 are controlled to increase the speed of the fan motor to 3
It switches to speed.

The external ROM 50 is connected to the ports P27 to P29 of the microcomputer 201, and the microcomputer 201 reads the unique data from the external ROM as needed.

In the above-described embodiment, an auxiliary ROM storing unique data for each model is prepared, and an auxiliary ROM suitable for the model of the air conditioner equipped with the control device may be mounted. In the above embodiment, the auxiliary RO
Although OTPROM is used for M, it is not limited to this and E2PROM may be used for auxiliary ROM. At this time, E2
PROM may be used like OTPROM, but E2
The PROM may be installed in the control device in advance and then the unique data may be stored in the E2PROM. Furthermore, by providing a backup power supply, the RAM can be supplemented
It is also possible to use it instead of OM.

[0055]

As described above, according to the present invention, the control circuit of the air conditioner is equipped with the storage element in which the specific data relating to the characteristic and function specific to each model is stored. It becomes possible to manufacture it as a common board with the model, which is advantageous in terms of cost, and the characteristics and functions of the air conditioner can be changed at any time simply by exchanging the memory element storing the unique data or rewriting the unique data. Will be able to change easily.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control circuit of an air conditioner according to the present invention.

FIG. 2 is a diagram showing an electrical connection state of control circuits of an indoor unit and an outdoor unit of the air conditioner.

3 is a partial wiring diagram of a part of the control circuit shown in FIG.

4 is a substantial wiring diagram of the remaining part of the control circuit shown in FIG.

FIG. 5 is a timing chart showing a read timing of unique data from an external ROM used in the present invention.

6 is a flowchart showing main operations of the microprocessor shown in FIG.

7 is a partial wiring diagram of a part of the control circuit shown in FIG.

FIG. 8 is a partial wiring diagram of a part of the control circuit shown in FIG.

[Explanation of symbols]

 1 Indoor Unit 2 Outdoor Unit 12 Motor Power Supply Circuit 13 Control Power Supply Circuit 14, 41 Microcomputer 20 Room Temperature Sensor 21 Heat Exchanger Temperature Sensor 22 Humidity Sensor 30, 50 External ROM 35 Double Voltage Circuit 38 Motor Drive Circuit 39 Serial Circuit 40 Power Supply Detection circuit

Claims (1)

[Claims] 1. A refrigeration cycle in which a compressor, an outdoor heat exchanger, a decompression device, and an indoor heat exchanger are connected by a refrigerant pipe, and a device such as a compressor or a blower is controlled to provide a room in a room to be conditioned. In a control device for controlling the device of an air conditioner configured to supply temperature-controlled air with an inner heat exchanger, the air conditioner includes an outdoor unit having at least a compressor and an outdoor heat exchanger, and at least a room. It is separated into an indoor unit having an inner heat exchanger, and the outdoor unit has a main ROM storing a program for controlling the operation of equipment mounted in the outdoor unit such as a compressor, and an R storing various data.
The capacity of the outdoor unit-side microcomputer that houses the AM and the CPU that executes the program in the same package, and the compressor,
The outdoor unit side auxiliary ROM that stores the unique data of the outdoor unit such as the capacity of the outdoor heat exchanger is stored, the outdoor unit side microcomputer controls the operation of the equipment based on various data and the unique data, and the indoor unit is the blower. A main ROM that stores a program for controlling the operation of equipment installed in the indoor unit, a RAM that stores setting data and various data according to the operation, and a CP that executes the program
The indoor unit side microcomputer that stores U in the same package and the indoor unit side auxiliary ROM that stores the unique data of the indoor unit such as the capacity of the indoor side heat exchanger and the variable width of the air volume of the blower are set. The operation of the equipment is controlled based on data, various data and unique data, and the outdoor unit side microcomputer and the indoor side microcomputer are connected by signal lines so that data can be sent and received between them. An air conditioner control device, which transmits and receives a signal to operate the air conditioner.