JPH06221654A - Controller and abnormality detector of air conditioner - Google Patents

Abstract

PURPOSE:To offer a controller of an air conditioner, which does not destroy or miswrite information stored in an EEPROM. CONSTITUTION:All air conditioner has an indoor side controller which sends control signals to an outdoor unit to control an outdoor unit, an inverter controller which control a compressor, and an outdoor side controller which controls the inverter controller, and is provided with a read/write EEPROM 80 which is connected to a microcomputer 20 of the indoor side controller and holds the information stored in a RAM of the microcomputer 20. The control condition information held in the EEPROM 80 are stored in the RAM of the microcomputer 20, and the information and control conditions stored in the EEPROM 80 are read out and written in the RAM of the microcomputer 20 when information becomes extinct due to an unexpected power cut-off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner control device, and more particularly, to a control device for writing information from a microcomputer to an EEPROM and a control device capable of analyzing in what environment the air conditioner was used. The present invention relates to an air conditioner having a self-diagnosis function.

[0002]

2. Description of the Related Art FIG. 17 shows, for example, Japanese Patent Laid-Open No. 4-62351.
In the block diagram showing the configuration of the conventional outdoor control unit shown in Japanese Patent Publication, an operation command signal for controlling the operation of the outdoor unit is sent from the indoor unit to the outdoor control unit 201 in the form of an AC power source and a serial signal. There is. The AC power source enters the converter unit 203 through the input power source circuit 202 including an external surge absorbing circuit, a noise filter, etc., is converted into a DC power source, is connected to the inverter unit 204 including a power transistor module, and is connected to the three-phase connection of the compressor 205. ing.

An operation command signal by a serial signal from the indoor unit enters the microcomputer 207 through the serial signal transmission / reception device 206, and the microcomputer 207
Is started, and the signal waveforms are synthesized to the inverter unit 204 and supplied to the power transistor drive circuit 208 according to the control condition stored in advance in the mask ROM, and the inverter unit 20
The power transistor of No. 4 is controlled to control the operation of the compressor 205 steplessly.

The microcomputer 207 has an EEP
A ROM 209 is connected, and the control conditions are read and held by a special serial signal from the inspection jig via the microcomputer 207 at the time of completion inspection of the product. The input power supply circuit 202 includes an input current sensor 210 and an inverter unit 20.
4, an overcurrent sensor 211 and an overtemperature sensor 212 are provided, and the A / D converter 2 of the microcomputer 207 is provided.
It is connected to 13.

When the compressor 205 is activated, the microcomputer 207 takes in signals from the room temperature sensor on the indoor side, the compressor and the temperature sensor 211 of the inverter unit, etc. by the A / D converter 213 of the microcomputer 207,
The preset control condition is fed back to change the waveform synthesis for the inverter to adjust the indoor state to the set control state.

When power is turned off in this state, the RAM
The control conditions written in are deleted, but EEPROM2
The control condition written in 09 is saved as it is and is called from the EEPROM 209 at the time of restart, and the RAM is
By being written in, the operating state of the compressor 205 can be connected without newly inputting control conditions manually.

Further, the adjustment range of the electric wave detection function or the temperature detection function is written in the EEPROM 209 in advance, so that the detected value of the detection function or the temperature detection function is constantly compared with the adjustment range during operation, so that the input current The detection accuracy of the detection circuit 214 can be increased and stable control operation can be performed.

Further, signals from various sensors are chronologically output from the RAM of the microcomputer 207 to the EEPROM 2
By writing and storing the data in the memory 09, the failure state is stored in the EEPROM 209 even when the power supply is cut off due to the occurrence of the failure, and by pursuing the cause of the failure, it is possible to prevent recurrence and improve the efficiency of repair work.

[0009] FIG. 18 shows, for example, the actual flat plate 2-131158.
Fig. 2 shows another conventional air conditioner failure diagnosis device shown in Japanese Patent Publication No. JP-A-2003-242, in which 1 is an indoor unit, 2 is a receiver of a signal from a wireless remote controller 3, and a self-diagnosis function is provided. Control circuit 4 and connection means 5 included
connected by a. Reference numeral 6 is a wired remote controller, which is connected to the control circuit 4 by a connecting means 5b.

Next, the operation will be described. When a command for executing self-diagnosis is given to the control board 4, the self-diagnosis is executed, and the result is output to the wired remote controller 6 connected for service through the connecting means 5b.

[0011]

Since the conventional inverter control device for the air conditioner is constructed as described above,
While reading information from EEPROM, EEP
When the ROM input ports (CS, SK, DI) are set to "Hi" or floating (undefined) state, EEP
There is a risk that the ROM is erroneously determined to be in the write state instead of the read state, and data may be erroneously written to an unspecified address. Further, there is a possibility that the control condition (data) held in the read-only address may be destroyed due to erroneous writing in the EEPROM. Also, EE
If the power supply voltage is insufficient while writing information (data) to the PROM from the microcomputer, EEPR
The information (data) written to the OM could be destroyed. Moreover, it has not been possible to know what kind of environment and how long the air conditioner has been used until now.

Also, in the case of another conventional self-diagnosis device for an air conditioner, even when a dedicated device is separately required or a remote controller is used, a dedicated switch for setting the remote controller to the service call mode is provided. It was necessary, and there were problems such as cost increase and deterioration of operability. Further, for the determination of the self-diagnosis result, it is necessary to refer to the service catalog or the determination sheet attached to the unit or the like, which causes a problem that it takes time. In addition, the EEPROM requires a dedicated device to revise and abolish the stored contents, cannot easily be repaired and cannot be operated under operating conditions, and optimal operation control can be performed according to the conditions of the place of use. There were problems such as not being. Further, there is a problem that it is not easy to determine which of the indoor and outdoor devices is out of order.

The present invention has been made in order to solve the above problems, and does not destroy or erroneously write information (data) or control conditions (data) held in an EEPROM, and it is also possible to use air. An object of the present invention is to provide an air conditioner control device capable of knowing in what environment and how long the air conditioner has been used.

Another object of the present invention is to provide an air conditioner which can be easily set to a service call mode, improves service efficiency, and has a failure diagnosis device which enables even a beginner to accurately make a failure diagnosis. Another object of the present invention is to obtain an air conditioner which can be operated by changing the contents of the EEPROM and substituting the indoor unit and the outdoor unit with a remote controller.

[0015]

According to a first aspect of the present invention, there is provided a control device for an air conditioner, wherein a temperature set by a room temperature setting device, an indoor temperature detected by an indoor temperature detecting device, and an indoor condition detected by an indoor heat exchange temperature detecting device. Send a control signal consisting of the heat exchange temperature and the indoor humidity detected by the indoor humidity detector to the outdoor unit,
An air conditioner including an indoor side control unit that controls the operation of the outdoor unit by a microcomputer, an inverter control device that controls the power supply frequency and voltage to the compressor, and an outdoor side control unit that controls the inverter control device. In the machine
Connected to the microcomputer of the indoor control unit,
A read / write EEPROM for holding information stored in the RAM of the microcomputer;
The control condition information held in the EEPROM is stored in the RAM of the microcomputer, and the information and control conditions held in the EEPROM are read out when the information disappears due to an accidental power-off or the like. It is characterized by writing in.

A control device for an air conditioner according to a second aspect is the control device for an air conditioner according to the first aspect, wherein EEPRO is used.
When writing information to M, it is provided with means for transmitting a set of write permission, write information, and write inhibition, and means for always making the EEPROM write-protected in a state other than writing. .

A control device for an air conditioner according to a third aspect is the control device for an air conditioner according to the first aspect, wherein EEPRO is used.
When the information is written in M, it is provided with a means for once reading and confirming the data of the written address and a judging means, and a means for writing all the control conditions of the read-only address if they are different.

A control device for an air conditioner according to a fourth aspect is the control device for an air conditioner according to the first aspect, wherein EEPRO is used.
When the voltage of the commercial power source is insufficient or the commercial power source is cut off while writing information to M, the EEP
It is provided with means for stopping the writing of information in the ROM.

A control device for an air conditioner according to a fifth aspect is the control device for an air conditioner according to the first aspect, wherein EEPRO is used.
The board on which M is mounted is returned, and means for reading the information written in the EEPROM and means for analyzing the information are provided, and the environment under which the board is used and how long it has been used can be determined. It can be surveyed and can be useful for the development of the next air conditioner.

The abnormality detecting device for an air conditioner according to claim 6 is
A main unit having a control circuit including a self-diagnosis circuit;
Turn on the power at the same time while pressing the button on the panel with the remote controller that can remotely operate the self-diagnosis,
Alternatively, the service call function mode switching means for simultaneously mounting the battery while pressing the button on the panel is provided.

An abnormality detecting device for an air conditioner according to claim 7 is
In the abnormality detecting device for an air conditioner according to claim 6, the remote controller, in the service call function mode, is capable of displaying a fault diagnosis means and a fault estimation content by an interactive method on its display part. It is a thing.

An abnormality detecting device for an air conditioner according to claim 8 is
A main unit having a control circuit including a self-diagnosis circuit;
Turn on the power at the same time while pressing the button on the panel with the remote controller that can remotely operate the self-diagnosis,
Alternatively, in an air conditioner having a service call function mode switching means for simultaneously mounting a battery while pressing a button on the panel and an EEPROM for storing operation history and operation information of a model, an operation of deleting and changing the information in the EEPROM It is equipped with a remote controller.

An abnormality detecting device for an air conditioner according to claim 9 is
The abnormality detecting device for an air conditioner according to claim 6, wherein the remote controller substitutes for the indoor / outdoor microcomputer in the case of the service call function mode, and the microcomputer is provided with a function of individually performing failure diagnosis of indoor and outdoor. Is.

[0024]

The controller of the air conditioner according to claim 1 is the EEPR.
By providing means for not setting the input ports (CS, SK, DI) of the OM to "Hi" or floating (undefined) state, the control for reading information (data) from the EEPROM is not misjudged as the control for writing. EEPRO
It is not necessary to destroy the information (data) and control conditions (data) of M.

When the information (data) is written in the readable / writable EEPROM, the control device for an air conditioner according to a second aspect of the invention permits write permission / write information (data).
By sending one set of write-prohibition and setting the write-prohibition state to the EEPROM at all times except for writing, the EEPROM does not misread the READ command as a WRITE command, and unspecified address information (data) It is possible to prevent erroneous writing.

The control device for an air conditioner according to claim 3 is EE
A means for confirming and judging whether the information (data) has been normally written to the PROM is provided, and a means for resetting the control condition (data) of the read-only address of the EEPROM is provided if the information is not normally written, and then E
By providing the means for writing information (data) to the EPROM, it is not necessary to destroy the information (data) and control conditions (data) of the EEPROM.

The controller of the air conditioner according to claim 4 is EE
An EEPROM capable of determining whether information (data) can be written to the PROM and a power supply monitoring means for the microcomputer are provided. If the power supply monitoring means is normal, the EEPROM is provided.
The permission to write information (data) to the EEPR
It is not necessary to destroy the information (data) and control conditions (data) written in the OM.

The control device for an air conditioner according to a fifth aspect of the invention is provided with a means for storing in what kind of environment and how long the air conditioner (board) has been used. The analysis can be useful for the development of the next air conditioner.

The abnormality detecting device for an air conditioner according to claim 6 is
Using a conventional wireless remote controller, abnormality diagnosis can be performed without using a special device.

The abnormality detecting device for an air conditioner according to claim 7 is:
Since the failure diagnosis procedure and judgment criteria are displayed on the display unit of the remote controller, failure diagnosis is possible without using a service manual.

The abnormality detecting device for an air conditioner according to claim 8 is:
Since the remote controller has a function for checking and changing the contents of the EEPROM, failure diagnosis is easy.

The abnormality detecting device for an air conditioner according to claim 9 comprises:
Since the microcomputer built into the remote controller has the same specification information as the indoor and outdoor microcomputers, the remote controller can diagnose the content of the abnormality.

[0033]

【Example】

Example 1. FIG. 1 is a configuration diagram of a control device for an air conditioner. In the figure, 10 is a power supply circuit section, and the configuration of the power supply circuit section 10 is as follows. Reference numeral 11 is a commercial power source, which converts it into a low voltage through a power transformer 12, performs full-wave rectification using a diode bridge 13, and connects a 5V power three-terminal regulator 15 through a 12V power three-terminal regulator 14. ing. Reference numerals 16, 17, and 18 are electrolytic capacitors for smoothing and stabilizing the respective power supplies. Reference numeral 20 denotes a microcomputer (hereinafter referred to as a microcomputer) which is the core of the control device of the air conditioner. Thirty
Is a microcomputer power supply monitoring circuit section for monitoring whether the power supply voltages of the microcomputer and the EEPROM are sufficiently stable, and 40 is a check whether the power supply voltage of the microcomputer and the EEPROM becomes insufficient while writing data to the EEPROM. An EEPROM power supply monitoring circuit unit for monitoring. Reference numerals 31 and 41 are pull-up resistors. Reference numeral 50 denotes an indoor temperature detection circuit block. The indoor temperature detection circuit block 50 comprises an indoor temperature thermistor 51 for detecting the indoor temperature and a room temperature detection circuit section 52 for converting the indoor temperature into a voltage so that the microcomputer 20 can take in the indoor temperature. . Reference numeral 60 denotes an indoor heat exchanger temperature detection circuit block, and the indoor heat exchanger temperature detection circuit block 60 uses an indoor heat exchanger temperature thermistor 61 for detecting the indoor heat exchanger temperature and an indoor heat exchanger temperature microcomputer. It is composed of an inner tube temperature detection circuit unit 62 that converts the voltage so that 20 can be taken in. Reference numeral 70 denotes an indoor humidity detection circuit block. The indoor humidity detection circuit block 70 includes a humidity sensor 71 for detecting indoor humidity and a humidity detection circuit section 72 for converting the indoor relative humidity into a voltage so that the microcomputer 20 can take in the humidity. . Reference numeral 80 denotes an EEPROM for writing information (data) or reading control conditions (data).
0 input / output ports (SK, DI, DO) and microcomputer 2
A pull-up resistor 81 is connected to each line connecting the 0 input / output port,
A pull-down resistor 82 and a pull-up capacitor 83 are connected to the line connecting the input port (CS) 80 and the output port of the microcomputer 20. EEPROM
80 power ports (Vcc) and GND ports (GND)
A capacitor for noise removal is connected between and. Reference numeral 90 denotes an EEPROM internal data read control circuit section for reading the information (data) held in the EEPROM 80. The EEPROM internal data read control circuit section 90 includes an EEPROM data read changeover switch 91 and information to be read from the EEPROM 80. EEPROM analysis device 92 for displaying a set of (data) addresses and read information (data)
It consists of The operation unit 93 sets the address of the information (data), and the monitor unit 94 displays the information (data). Also, EEP
Pull-up resistors 96 are connected to the lines connecting the ROM analysis device 92 and the input / output ports (PO3, PI4, CLK) of the microcomputer 20, respectively.

Next, the operation of the control device of the air conditioner will be described. The microcomputer power supply monitoring circuit unit 30 monitors whether the output of the three-terminal regulator 15 of the 5V power supply is stable. That is, whether the output voltage of the three-terminal regulator 15 of the 5V power source is stable at 5V is because the input voltage of the three-terminal regulator 15 of the 5V power source is xV or more [12V>xV> 5.
V, (xV> 5V + n ₁ V), (Generally, the input voltage should be 6.7V or more, but since this 5V three-terminal regulator has 2V between input and output, if the input voltage is 7V or more, the output voltage will be Since 5V can be secured, 5V +
n ₁ V, where n ₁ is a margin and 2 ≦ n ₁ <7
)] Or is less than xV. That is, the output of the microcomputer power supply monitoring circuit unit 30 is
If the input voltage of the three-terminal regulator 15 of the 5V power supply is xV or more, it becomes "Hi", and the RESET input of the microcomputer 20 also becomes "Hi", and the microcomputer 20 and the EEPROM 80
Can operate stably (because this microcomputer and EEPROM can operate at a power supply voltage of 5V). The information (data) stored in the RAM of the microcomputer 20 is EEPR
EEPRO is to monitor whether it is possible to write to OM80 or whether 5V can be in a stable state during writing.
Since it is the M power supply monitoring circuit unit 40, before the microcomputer 20 is reset, the output of the EEPROM power supply monitoring circuit unit 40 is set to "Lo (Lo is a state in which it is detected that 5V is insufficient)", and the microcomputer 20 input ports PI2
Must be entered into the
The output of the power supply monitoring circuit unit 40 is "Hi"). Also,
After the output of the EEPROM power supply monitoring circuit unit 40 becomes "Lo", the output of the microcomputer power supply monitoring circuit unit 30 becomes "L".
It is assumed that it takes a certain time t to reach "o". Due to the certain time t, the 5V power source is supplied even while the information (data) stored in the RAM of the microcomputer 20 is being written in the EEPROM 80. The input voltage of the three-terminal regulator 15 decreases and the output voltage of the three-terminal regulator 15 of the 5V power source is unstable (or 0).
Information (data) can be normally written in the EEPROM 80 before switching to V). The output voltage of the three-terminal regulator 15 of the 5V power supply becomes insufficient (or 0V) when the commercial power supply (AC100V) 11 causes an instantaneous power failure or when the AC100V is turned off and becomes 0V. The indoor temperature thermistor 51, the indoor heat exchanger temperature thermistor 61, and the humidity sensor 71, which are sensors necessary for controlling the air conditioner, are also used as means for knowing in what environment the air conditioner was used. The indoor temperature thermistor 51 and the indoor heat exchanger temperature thermistor 61
And the temperature and humidity detected by the humidity sensor 71 are input to the analog ports (AN1, AN2, AN3) of the microcomputer 20 via the room temperature detection circuit unit 52, the inner pipe temperature detection circuit unit 62, and the humidity detection circuit unit 72, respectively. And stored in the RAM of the microcomputer 20. The temperature and humidity stored in this RAM are updated so that the maximum value and the minimum value are stored, and the stored information (data) is 00.
When it becomes H or FFH, it is not updated thereafter. In addition, the operating time of the air conditioner (that is, the operating time of the board (cumulative value)) is also the RA of the microcomputer 20.
Stored in M (not shown).

Next, the control of the control device of the air conditioner will be described with reference to the flowchart of FIG. Microcomputer 2
The information (data) stored in the 0 RAM is EEPR
This is the control of the microcomputer 20 when writing to the write-only address of the OM 80. Normal EE in step aa
Set the input port (CS, SK, DI) of PROM80 to "L"
In order to fix it to the "o" state, "Lo" is output to the three output ports of the microcomputer 20 connected to the input port. Next, it proceeds to step ab and it is determined whether or not information (data) is written in the EEPROM 80. If YES (write) is determined, the process proceeds to step ac, and the EEPROM is
The output port PO3 of the microcomputer 20 is set to “Hi” so that the port CS input of 80 is set to “Hi”, and then the serial clock is transmitted to the port SK input from the output port PO1 of the microcomputer 20 to write permission and write information ( (Data) and write-protection signal as one set,
From the output port PO2 of the microcomputer 20 to the EEPROM 80
To the input port DI, and the writing of information (data) to the EEPROM 80 is completed. Next, in step ad, the input port (CS, SK, D
In order to fix I) to the "Lo" state, "L" is added to the three output ports of the microcomputer 20 connected to the input port.
o "is output. If NO (not written) is determined in step ab, the process jumps to step ad.

Example 2. Next, in Example 2, EEPRO
When writing the information (data) to the M80, if the information (data) of the written address is read and confirmed once, and it is different, the control condition (data) of the read-only address is stored in the RAM of the microcomputer 20. data)
Will be described.

Since the block diagram of the control device for the air conditioner is the same as that in FIG. 1 and the operation is the same, the control of the control device for the air conditioner in the second embodiment will be described with reference to the flow chart of FIG. . Normal EEPR in step ba
Input port (CS, SK, DI) of OM80 is "Lo"
In order to fix the state, “Lo” is output to the three output ports of the microcomputer 20 connected to the input port. Next, in step bb, it is determined whether or not information (data) is written in the EEPROM 80, and YES (write)
If so, the process proceeds to step bc and the EEPROM 80
Microcomputer 20 to set the port CS input of
Output port PO3 of "HI", and then port SK
Input serial clock to output port P of microcomputer 20
The signal is transmitted from O1, the write permission, write information (data), and write prohibition signals are set as one set and transmitted from the output port PO2 of the microcomputer 20 to the input port DI of the EEPROM 80. Then go to step bd and EEP
Set the input port (CS, SK, DI) of ROM 80 to "L"
In order to fix it to the "o" state, "Lo" is output to the three output ports of the microcomputer 20 connected to the input port. Then, the process proceeds to step be. The port CS input of the EEPROM 80 is set to "Hi". As described above, the output port PO3 of the microcomputer 20 is set to "Hi", and then the serial clock is input to the port SK to output port PO1 of the microcomputer 20.
The address signal is transmitted from the output port PO2 of the microcomputer 20 to the input port DI of the EEPROM 80 to read the information (data) written in the EEPROM 80, and the information (data) written in the address of the EEPROM 80 is transmitted. The data is input from the output port DO of the EEPROM 80 to the input port PI2 of the microcomputer 20 and stored in the RAM of the microcomputer 20. The information (data) written in the EEPROM 80 is called into the RAM of the continuous microcomputer 20 twice. Then, both of the called information (data) are compared and if they match, the process proceeds to step bf. In step bf, the information (data) written in the EEPROM 80 by the microcomputer 20 is compared with the information (data) read in the microcomputer 20 from the information (data) written in the EEPROM 80. If the results of comparison between the two match, the process proceeds to step bg, and then proceeds to step bk to complete the writing of information (data) to the EEPROM 80. After that, the process proceeds to step bh, and the input port (C
In order to fix (S, SK, DI) to the "Lo" state, "Lo" is output to the three output ports of the microcomputer 20 connected to the input port. In step be
If the information (data) does not match twice, the process proceeds to NO, returns to step be, and the EEPROM 80 again.
When the information (data) written in (1) is matched with the calling information (data) twice in the microcomputer 20, the process proceeds to step bf. If NO (they do not match) in the comparison process of step bf, the process proceeds to step bi. Here, control is performed to write the control condition (data) stored in the RAM of the microcomputer 20 to the control condition (data) of the read-only address of the EEPROM 80. That is, control from step ba to step bf is performed (the microcomputer 2
0 is the first time when the air conditioner is controlled (initial)
In the EEPROM 80, the control condition (data) is stored in the read-only address, and the control condition (data) is stored in the RAM of the microcomputer 2 by the initialization process of the microcomputer 20. I won't explain. ).

At step bg, the EEPROM 80
It is determined whether or not reset processing for writing the control condition (data) to the address dedicated to calling If the reset processing is performed, the process proceeds to step bj, and the control condition (data) stored in the RAM of the microcomputer 20 is set to EEPR.
It is determined whether the writing (reset) of the control condition (data) to the call-only address of the OM80 is completed. If the reset is not completed, the process proceeds to step bi, but if the reset is completed, it is set to bk. Advanced EEPROM
A process for ending the writing of the control condition (data) to 80 is performed, and then the process proceeds to step bh. Further, in step bb, the microcomputer 20 causes the microcomputer 20 to perform EEPRO.
If it is determined that the information (data) is not written in M80, the process proceeds to step bh.

Example 3. Next, in the third embodiment, when the commercial power supply (AC100V) 11 is insufficient or turned off while the information is being written in the readable / writable EEPROM 80 and the 5V power supply voltage is insufficient, EEPRO
A method of canceling the writing of information (data) in M80 will be described.

The block diagram of the control device of the air conditioner is the same as that of FIG. 1, and the operation is also the same. Therefore, in this example, the control of the control device of the air conditioner will be described with reference to the flowchart of FIG. First, in step ca, the output of the microcomputer power supply monitoring circuit unit 30, that is, the voltage level of the reset input of the microcomputer 20 is detected, and if "Hi", xV or more [12V>xV> 5V, (xV> 5V + n ₁ V)]. It is determined that there is, and the process proceeds to step cb. In step cb, initialization processing of the microcomputer 20 is performed. After that, the process proceeds to step cc and the input port (CS, S
In order to fix (K, DI) to the "Lo" state, "Lo" is output to the three output ports of the microcomputer 20 connected to the input port. Then, in step cd, the operation control processing of the microcomputer 20 and the EEPROM 80 is performed. After that, the process proceeds to step ce, and it is determined whether information (data) can be written in the EEPROM 80. That is, the voltage level of the input port (PI1) of the microcomputer 20 is "H".
If i ″, yV or more [12V>yV>xV> 5V, (y
V> 5V + n ₁ V + n ₂ V, and n ₁ and n ₂ are margins considering the voltage fluctuation due to the load current of the circuit and the inherent variation of the three-terminal regulator as shown in Example 1, and 2 ≦ n ₁ <7, 1 ≤ n ₂ <7-n ₁ ), (the output of the EEPROM power supply monitoring circuit unit 40 is "H"
i ".)]] and the process proceeds to step cf. At step cf, a process of writing the information (data) stored in the RAM of the microcomputer 20 to the EEPROM 80 is performed. When the writing to the EEPROM 80 is completed, step cg Proceed to the input port (C
In order to fix (S, SK, DI) to the "Lo" state, "Lo" is output to the three output ports of the microcomputer 20 connected to the input port. In the step ce determination, if the voltage level of the input port (PI1) of the microcomputer 20 is "Lo", it is less than yV (the output of the EEPROM power supply monitoring circuit unit 40 indicates "Lo". In the above example, the power supply voltage of the microcomputer and the EEPROM is shown. Is set to 5V, but if the recommended voltage range is 4.5 to 5.5V, 5V is set to 4.
It can be shown as 5V) and the process proceeds to step ch. In step ch, it is determined whether or not the process of writing the information (data) stored in the RAM of the microcomputer 20 into the EEPROM 80 is being executed. If it is determined that the process is being executed, the process proceeds to step ci. In step ci, the information (data) currently stored in the RAM of the microcomputer 20 is EEPRO.
After the process of writing to M80 is completed, the RAM of the microcomputer 20
The process of stopping the writing of the information (data) stored in the EEPROM 80 to the EEPROM 80 is performed, and then the process proceeds to step cg. If it is determined in step ch that the process of writing the information (data) stored in the RAM of the microcomputer 20 to the EEPROM 80 is not being executed, the process proceeds to step cj and the information (data) stored in the RAM of the microcomputer 20 is EEPR.
Writing to the OM 80 is stopped, and then the process proceeds to step cg. Further, in step ca, the voltage level of the output of the microcomputer power supply monitoring circuit section 30, that is, the voltage level of the reset input of the microcomputer 20 is detected. If "Lo", it is judged to be less than xV and the process proceeds to step ck. 20 is hard reset and the microcomputer 2
The 0 program runs in standby mode.

Example 4. Next, in the fourth embodiment, the substrate on which the readable / writable EEPROM 80 is mounted is returned, and a means for reading the information (data) written in the EEPROM 80 is provided to analyze the information (data). Described below is a method capable of investigating in what kind of environment and for how long the air conditioner (substrate) has been used, which can be useful for the development of the next air conditioner. First, regarding the operation, only the EEPROM internal data read control circuit section 90, which is different from the first embodiment, will be described. In the microcomputer 20, the voltage level of the input port (PI3) of the microcomputer 20 is "Lo" (when the data read changeover switch 91 is O.
N state), the microcomputer 20 operates based on the received signal from the EEPROM analysis device 92, and the voltage level of the input port (PI3) of the microcomputer 20 is "
Hi ”(data read switch 91 is OFF
If it indicates the state), the operation based on the EEPROM analysis device 92 is not performed. In this case, the microcomputer 20 is EEPRO
The description of the maximum value and minimum value of the indoor temperature, indoor heat exchanger humidity, indoor humidity, etc., the operating time of the air conditioner (that is, the cumulative value of the usage time of the board), and other information writing method to M80 is omitted. To do.

Next, the control will be described with reference to the flowchart of FIG. First, in step da, the microcomputer 20
Determines whether the voltage level of the input port (PI3) of the microcomputer 20 is "Lo". If "Lo" is determined, the process proceeds to step db, and the information stored in the EEPROM 80 in the operation unit 93 of the EEPROM 92 is stored. Set the (data) address. The set address is displayed on the monitor unit 94, and at the same time, the set address is transmitted to the input port (PI4) of the microcomputer 20 as a serial signal. After that, the process proceeds to step dc, and when the microcomputer 20 receives the address, the address is sent from the output port (PO2) of the microcomputer 20 to the EEPR.
The serial signal is transmitted to the input port (DI) of the OM80. After that, the process proceeds to step dd, and the EEPROM 80 writes the information (data) held at the received address to E
From the output port (DO) of the EPROM 80 to the microcomputer 20
Is transmitted as a serial signal to the input port (PI2) of.
Thereafter, in step de, the microcomputer 20 transmits the received information (data) from the output port (PO4) of the microcomputer 20 to the EEPROM analysis device 92 as a serial signal. Then, proceeding to step df, when the EEPROM 92 receives the information (data), it displays the received information (data) on the monitor unit 94. In this way, the information (data) stored in the EEPROM 80
Can be known through the EEPROM analysis device 92. The information (data) is the maximum and minimum values of the indoor temperature, the indoor heat exchanger temperature, the indoor humidity, etc., the operating time of the air conditioner (that is, the cumulative value of the operating time of the board), and other information. The microcomputer 20 is an EEPROM if the voltage level of the input port (PI3) of the microcomputer 20 is "Hi".
The control based on the analysis device 92 is not performed. At step da, if the voltage level of the input port (PI3) of the microcomputer 20 is "Hi", the operation based on the EEPROM analysis device 92 is not performed.

Example 5. Embodiment 5 of the present invention will be described below with reference to the drawings. In FIG. 6, 1 is an indoor unit,
Reference numeral 3 is a wireless remote controller, 2 is a receiving unit for receiving signals from the wireless remote controller, and is connected to a control circuit 4 having a self-diagnosis function. Reference numeral 7 denotes a self-diagnosis result display LED, which is connected to the control circuit 4. Reference numeral 8 is a transmission unit, 9 is a display unit, 110 is a power switch, and 111 is a service mode setting switch, which also serves as another function switch during normal operation. Figure 10
Is a functional block diagram, and FIG. 11 is a flowchart of the program.

Wireless remote controller 3
Usually has an air conditioner operation function. The service mode setting switch 110 is also normally used as a switch (key) for operating the air conditioner. When failure diagnosis is required, the remote controller 3 is switched to the service mode. At this time, if the power switch 110 is turned off and then on while the service mode setting switch is still being pressed, or if the battery is inserted while the service mode setting switch is being pressed, the remote controller 3 will start service. The mode is set. In the service mode setting, the remote controller 3 normally sends a failure diagnosis instruction signal each time the air conditioner operating switch is switched to the service mode switch and the key is pressed. The signal is received by the receiving unit 2 of the main body, a failure diagnosis is performed by the control circuit 4, and the result is output to the display LED 7.

Example 6. Next, FIG. 7 is a plan view showing the display unit of the wireless remote controller in the service mode according to the sixth embodiment. In the figure, 9 is a display unit of the wireless remote controller 3. 11
2a is a display at the time of the increase operation, and 112b is an example of display contents at the service mode. The service mode setting display section displays the service mode display 112 more than the normal operation display 112a.
b. In the figure, reference numeral 113a indicates a current failure diagnosis item, 113b indicates blinking of the failure diagnosis result display LED 7 and a judgment criterion, 113c indicates an instruction for judgment, 113
Subsequent operation instructions are displayed in d. The display 112b in the service mode and the display 112a in the normal operation are constructed by means of, for example, a two-plane liquid crystal.

Example 7. Next, FIG. 8 shows the configuration of a remote controller having an EEPROM operating function in the seventh embodiment. In the figure, 1 to 8 are the same as FIGS. An outdoor unit 114 is connected to the indoor unit 1 by piping and a connection cable 115. The outdoor unit 114 has EEP
There is an outdoor unit control circuit 116 equipped with a ROM 117,
It is electrically connected to the indoor control circuit 4 by a connection cable 115.

Next, the operation will be described. In the same manner as in the fifth embodiment, the remote controller 3 set to the EEPROM rewriting mode sends an instruction to rewrite the contents of the EEPROM to the receiving unit 2 from the transmitting unit 8. At this time, erroneous operation is protected by the microcomputer of the remote controller. Further, it is sent to the control circuit 4, and further the connection cable 1
After being sent to the microcomputer of the outdoor control circuit 116 via 15 to prevent erroneous operation by the microcomputer, EEPRO
Rewrite M117. FIG. 12 is a functional block diagram showing the above operation, and FIG. 13 is a flow chart showing the operation of each microcomputer.

According to the seventh embodiment, the following effects can be obtained. Erasing and changing information in the conventional EEPROM is EEPR
It was necessary to take out the substrate (indoor or outdoor) on which the OM is mounted and to perform it. For this reason, it has been difficult to change the operating conditions according to the climate of the installation location and easy model switching, which is time-consuming in terms of service. By giving the remote controller the function of deleting and changing the information in the EEPROM (point),
E easily adjust the operating conditions that match the conditions of the installation location of the air conditioner.
Can be set in EPROM.

In a city, noise of an air conditioner often causes a problem, so that it may be necessary to change the operating frequency condition from a normal condition. In such a case, after installing an air conditioner under normal conditions, if it is a residential area, the remote controller is set to the EEPROM information change mode and the operating condition is changed using the remote controller.

Example 8. FIG. 9 shows a failure diagnosis method by the microcomputer of the remote controller according to the eighth embodiment. The configuration is the same as in FIG. In failure diagnosis,
In the example in which it is determined that both indoors and outdoors are abnormal, there are cases where the indoors and outdoors are associated with each other and both become abnormal. In this case, one is normal and repair is unnecessary, so this is a means for determining this. First, when it is determined that both indoors and outdoors are abnormal (step 301), the microcomputer of the remote controller is set to the outdoor microcomputer specifications (step 302), the indoor microcomputer is communicated with, and the indoor microcomputer is checked (step 30).
3). Then, the microcomputer of the remote controller is set to the indoor microcomputer specification (step 304), and the outdoor microcomputer is communicated with to check the outdoor microcomputer (step 30).
5). Based on the result, it is determined whether the cause of the failure is indoors or outdoors, both of them, or other parts (step 306). FIG. 14 is a functional block diagram showing an example of the above-described operation. Normally, the remote controller 3 is specified for transmitting a signal from the remote control transmitter 8 to the indoor unit 1. However, the indoor transceiver circuit 118 and the outdoor transceiver circuit are specified. By providing 119, the signal line 115 can be removed and the signal can be directly connected to the indoor unit 1 or the outdoor unit 114 so that it can be checked which unit, the indoor unit or the outdoor unit, is out of order.

The failure diagnosis function will be described in more detail. The failure diagnosis is a function of determining the content of an abnormality according to a program in the microcomputer. The indoor and outdoor microcomputers exchange information with each other to perform control. Therefore, if an abnormality occurs in one of them, erroneous information may be transmitted, and the other may instruct an operation different from the normal operation, resulting in an abnormality. For example, an abnormality of the temperature sensor on the indoor side ... Tells that what is originally high is low. Increase outdoor operation ... Shut off due to temperature rise outside the room. In this case, it is necessary to determine whether the indoor is abnormal, the outdoor is abnormal, or both are abnormal in order to efficiently perform the service. In this embodiment, a microcomputer with a remote controller is provided with information having the same specifications as those of indoor and outdoor microcomputers, and communication is performed as follows. Remote control indoor specification information → outdoor microcomputer Remote control outdoor specification information → indoor microcomputer If this information is obtained and normal operation is performed, it can be determined that the corresponding microcomputer is normal. As a specific configuration, the microcomputer of the remote controller is provided with an indoor microcomputer specification and an outdoor microcomputer specification for failure diagnosis, and the failure diagnosis is performed as described above.

Example 9. FIG. 15 is a perspective view of the remote controller according to the ninth embodiment. In the figure, 118 is a remote control lid,
Reference numeral 119 denotes a protrusion provided on the lid 118 of the remote controller. When the lid 118 is closed, the protrusion 119 engages with the changeover switch 120 and turns on the changeover switch 120. Lid 11
In the state where 8 is closed, pressing the key 121 on the lid side presses the key 122 opposite thereto.
In this case, when the switch 120 and the key 122 are pressed at the same time, the lid 118 is opened and the switch 120
A command different from the key 122 operation is issued when is not pressed. With such a configuration, the switch 120
And the key 123 that is not facing the key 121 on the lid side
Are not pressed at the same time. Here, one of the keys 123 is set as a service mode changeover switch, and the switch 120 is turned on by a protrusion such as a ballpoint pen while pressing this key, whereby the remote control mode becomes the service call mode. (Fig. 1
6).

[0053]

According to the controller of the air conditioner of the first aspect, the set temperature by the room temperature setting device, the indoor temperature detected by the indoor temperature detector, the indoor heat exchange temperature detected by the indoor heat exchange temperature detector, And an indoor-side control unit that sends a control signal including the indoor humidity detected by the indoor humidity detector to the outdoor unit and controls the operation of the outdoor unit by a microcomputer, and an inverter that controls the power supply frequency and voltage to the compressor. In an air conditioner having a control device and an outdoor control unit for controlling the inverter control device, the air conditioner is connected to a microcomputer of the indoor control unit and holds information stored in a RAM of the microcomputer. A read / write EEPROM is provided, and the EEPROM
The control condition information held in M is stored in the RAM of the microcomputer, and the information and control conditions held in the EEPROM are read when the information disappears due to an accidental power-off or the like.
Since it is configured to write information in the EEPROM, the control for reading information from the EEPROM is not erroneously determined as the control for writing, and the information and control conditions of the EEPROM are not destroyed.

A control device for an air conditioner according to a second aspect is the control device for an air conditioner according to the first aspect, wherein EEPRO is used.
When writing information to M, it is configured to have a means for transmitting a set of write permission, write information, and write prohibition, and means for always making the EEPROM write-protected in a state other than writing. So EEPR
The OM does not misinterpret the READ command as a WRITE command, and it is possible to prevent erroneous writing of information to an unspecified address.

An air conditioner controller according to a third aspect of the present invention is the air conditioner controller according to the first aspect, wherein EEPRO is used.
When the information is written in M, the configuration is provided with a means and a determination means for once reading and confirming the data of the written address, and a means for writing all the control conditions of the read-only address if they are different. , EEPRO
The effect is that the control condition to be held in the read-only address of M need not be destroyed.

A control device for an air conditioner according to a fourth aspect is the control device for an air conditioner according to the first aspect, wherein EEPRO is used.
When the voltage of the commercial power supply is insufficient or the commercial power supply is cut off while writing information to M, the EEPR
Since the configuration is provided with a means for stopping the writing of information to the OM, there is an effect that it is not necessary to destroy the information (data) of the address to be written.

A control device for an air conditioner according to a fifth aspect is the control device for an air conditioner according to the first aspect, wherein EEPRO is used.
The board on which M is mounted is returned, and means for reading the information written in the EEPROM and means for analyzing the information are provided, and the environment under which the board is used and how long it has been used can be determined. Since the configuration is such that it can be investigated and can be utilized for the next development of the air conditioner, the effect that it can be utilized for the next development of the air conditioner is obtained by analyzing the written information.

The abnormality detecting device for an air conditioner according to claim 6 is
A main unit having a control circuit including a self-diagnosis circuit;
Turn on the power at the same time while pressing the button on the panel with the remote controller that can remotely operate the self-diagnosis,
Alternatively, since the service call function mode switching means for simultaneously mounting the battery while pressing the button on the panel is provided, the device can be inexpensive and the user does not accidentally switch to the service function mode. Thus, it is possible to obtain a failure diagnosis device with high operability.

The abnormality detecting device for an air conditioner according to claim 7 is
In the abnormality detecting device for an air conditioner according to claim 6, in the case where the remote controller is in the service call function mode, the remote controller is configured to be capable of displaying a failure diagnosis means by an interactive method and a failure estimation content. This has the effect of enabling failure diagnosis without using a service manual.

An abnormality detecting device for an air conditioner according to claim 8 is
A main unit having a control circuit including a self-diagnosis circuit;
Turn on the power at the same time while pressing the button on the panel with the remote controller that can remotely operate the self-diagnosis,
Alternatively, in an air conditioner having a service call function mode switching means for simultaneously mounting a battery while pressing a button on the panel and an EEPROM for storing operation history and operation information of a model, an operation of deleting and changing the information in the EEPROM Since the remote controller capable of performing the above is provided, the failure diagnosis can be easily performed.

The abnormality detecting device for an air conditioner according to claim 9 comprises:
The abnormality detecting device for an air conditioner according to claim 6, wherein the remote controller substitutes for the indoor / outdoor microcomputer in the case of the service call function mode, and the microcomputer is provided with a function of individually diagnosing failure inside and outside. Therefore, the effect that the content of the abnormality can be diagnosed by the remote controller is produced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a control device for an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a control flowchart of the first embodiment of the present invention.

FIG. 3 is a control flowchart of the second embodiment of the present invention.

FIG. 4 is a control flowchart of the third embodiment of the present invention.

FIG. 5 is a control flow chart of a fourth embodiment of the present invention.

FIG. 6 is a front view of an abnormality detecting device for an air conditioner according to a fifth embodiment of the present invention.

FIG. 7 is a plan view showing a display unit of a remote controller according to a sixth embodiment of the present invention.

FIG. 8 is a configuration diagram of a remote controller according to a seventh embodiment of the present invention.

FIG. 9 is a flow chart showing a failure diagnosis method according to an eighth embodiment of the present invention.

FIG. 10 is a functional block diagram of a fifth embodiment of the present invention.

FIG. 11 is a flow chart for explaining the operation of the microcomputer in the fifth embodiment of the present invention.

FIG. 12 is a functional block diagram of a seventh embodiment of the present invention.

FIG. 13 is a flow chart for explaining the operation of the microcomputer according to the seventh embodiment of the present invention.

FIG. 14 is a functional block diagram of Embodiment 8 of the present invention.

FIG. 15 is a perspective view of a remote controller according to a ninth embodiment of the present invention.

FIG. 16 is a flow chart of Embodiment 9 of the present invention.

FIG. 17 is a block diagram showing a configuration of an outdoor side control unit of a conventional air conditioner.

FIG. 18 is a front view showing a conventional failure diagnosis device for an air conditioner.

[Explanation of symbols]

 1 Indoor Unit 2 Receiver 3 Wireless Remote Controller 4 Control Circuit Including Self-Diagnosis Device 5a Connection Means 5b Connection Means 6 Wired Remote Controller 7 Self-Diagnosis Result Display LED 8 Transmitter 9 Display 10 Power Circuit 11 Commercial Power supply 14 12V power supply three-terminal regulator 15 5V power supply three-terminal regulator 20 Microcomputer 30 Microcomputer power supply monitoring circuit unit 40 EEPROM power supply monitoring circuit unit 50 Indoor temperature detection circuit block 51 Indoor temperature thermistor 60 Indoor heat exchanger temperature detection circuit block 61 Indoor heat exchanger Temperature thermistor 70 Indoor humidity detection circuit block 71 Indoor humidity sensor 80 EEPROM 90 EEPROM data reading control circuit section 91 EEPROM data reading changeover switch 92 EEPROM analysis device 93 Operation unit 94 Monitor unit 110 Power switch 111 Service mode setting switch 112a Normal operation display 112b Service mode display 113a Current failure diagnosis item 113b Judgment criteria 113c Instruction after judgment 113d Operation procedure 114 Outdoor unit 115 Connection cable 116 Outdoor unit control circuit 117 EEPROM

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideyo Tamura 3-18-1, Oga, Shizuoka City Mitsubishi Electric Co., Ltd. Shizuoka Manufacturing (72) Inventor Yuichi Itoi 3-18-1, Oga, Shizuoka Mitsubishi Electric Co., Ltd. Shizuoka Factory

Claims (9)

[Claims] 1. From a set temperature by a room temperature setting device, an indoor temperature detected by an indoor temperature detector, an indoor heat exchange temperature detected by an indoor heat exchange temperature detector, and an indoor humidity detected by an indoor humidity detector A control signal sent to the outdoor unit to control the operation of the outdoor unit by a microcomputer, an inverter control device that controls the power supply frequency and voltage to the compressor, and a room that controls the inverter control device. In an air conditioner having an outside control unit, a read / write EEPROM that is connected to the microcomputer of the indoor control unit and holds information stored in the RAM of the microcomputer is provided, and the EEPROM is stored in the EEPROM. The stored control condition information is stored in the RAM of the microcomputer, and the information of A control device for an air conditioner, which reads information and control conditions retained in the EEPROM for disappearance and writes the information in a RAM of the microcomputer. 2. A means for transmitting one set of write permission, write information, and write prohibition when writing information in the EEPROM, and the EEPROM which is always in the non-write state.
The control device for an air conditioner according to claim 1, further comprising: a unit that sets a write-protected state to the OM. 3. When the information is written in the EEPROM, it is provided with a means for once reading and confirming the data of the written address and a judging means, and, if different, means for writing all the control conditions of the read-only address. The control device for an air conditioner according to claim 1. 4. A means for stopping the writing of information to the EEPROM when the voltage of the commercial power supply is insufficient or the commercial power supply is cut off while writing information to the EEPROM. 1. The control device for an air conditioner according to 1. 5. A substrate on which an EEPROM is mounted is returned, and means for reading the information written in the EEPROM and means for analyzing the information are provided, and in what environment the substrate is and how much. The control device for an air conditioner according to claim 1, which is capable of investigating whether or not the air conditioner has been used for a time and is useful for the next development of the air conditioner. 6. A main body unit having a control circuit including a self-diagnosis circuit, a remote controller capable of remotely controlling the self-diagnosis, and simultaneously turning on the power while pressing a button on the panel of the remote controller, or the panel. An abnormality detecting device for an air conditioner, comprising: a service call function mode switching means for switching to a service call function mode by simultaneously mounting a battery while pressing the above button. 7. The air conditioner according to claim 6, wherein the remote controller, in the service call function mode, is capable of displaying a failure diagnosis means by an interactive method and failure estimation contents on its display section. Anomaly detection device. 8. A main unit having a control circuit including a self-diagnosis circuit, a remote controller capable of remotely controlling self-diagnosis, and simultaneously turning on the power while pressing a button on the panel or pressing a button on the panel. However, the service call function mode switching means for mounting the battery at the same time and the EEPROM for storing the operation history and the operation information of the model
An air conditioner having M,
Abnormality detection device for air conditioners equipped with a remote controller that can delete and change the information in. 9. The remote controller substitutes for the indoor / outdoor microcomputer in the case of the service call function mode, and the microcomputer is provided with a function of individually diagnosing failure inside / outdoor. Air conditioner abnormality detection device.