JPH031035A - Operation control device for air conditioning device - Google Patents

Abstract

PURPOSE:To enable a title device to be applicable to many kinds of controllers on the outdoor side by a method wherein a controller for an inverter forms one transmission block with an address signal, a check signal, and a data signal and responses to a transmission signal from a controller on the outdoor side. CONSTITUTION:Transmission and receipt are alternately effected at each trans mission block between controllers 5 and 6 by means of first and second transmis sion control means 51 and 61. A control signal, e.g. an operation signal, is transmitted and received therebetween. A second transmission control means 61 of the controller 6 for an inverter forms one transmission block with an address signal and a check signal, and transmits, for example, at 16 bits. Fur ther, in the controller 6 for an inverter, a specified signal output means 63a outputs a specified signal in response to a transmission signal from the control ler 5 on the outdoor side, and a second transmission control means 61 transmits specified data. Thereafter, when overcurrent abnormality occurs to the controller 6 for an inverted, a stage signal output means 63b outputs a state signal, and the second transmission control means 61 transmits state data instead of speci fied data to the controller 5 on the outdoor side.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an operation control device for an air conditioner that controls a compressor motor using an inverter, and particularly relates to measures for transmitting control signals.

(Prior art) Generally, in an air conditioner, after the refrigerant is compressed by a compressor, the refrigerant is exchanged with an outdoor heat exchanger, the pressure is reduced by an expansion mechanism, the refrigerant is exchanged with an indoor heat exchanger, and then the refrigerant is transferred to the compressor. I'm trying to get it back.

The compressor motor is supplied with electric power from a power supply via a rectifier circuit and an inverter, and the inverter is controlled by a controller to control the rotation speed of the compressor motor.

On the other hand, the main controller of the air conditioner receives refrigerant temperature signals from both indoor heat exchangers, etc., and outputs control signals to the inverter controller to adjust the capacity of the compressor in response to the indoor heat load, etc. At the same time, it also controls outdoor fans, indoor fans, etc.

(Problem to be Solved by the Invention) In the operation control device for the air conditioner described above, in a multi-type air conditioner, etc., an outdoor controller and an indoor controller are configured separately, and the outdoor controller controls the inverter controller. Some devices output signals.

On the other hand, in the air conditioner, the amount of information exchanged between each controller, such as temperature signals, is increasing in order to improve air conditioning efficiency and comfort. Therefore,
Various transmission methods have been adopted between the outdoor controller and the indoor controller, but the outdoor controller and the inverter controller have conventionally been configured as one unit, making it easy to send and receive control signals. This makes it possible to fully cope with an increase in the amount of information.

However, in this case, since the inverter controller and the outdoor controller are integrated, there is a problem that the inverter control system has poor versatility. That is, there is a problem that one inverter controller cannot be applied to many types of outdoor controllers.

Therefore, it is conceivable to configure the inverter controller and the outdoor controller separately, but if a simple transmission method is adopted, it will not be possible to cope with the increase in the amount of information, and at the same time, the controller for the inverter There is a problem that the range of application is narrow and it is not possible to sufficiently expand the versatility.

The present invention has been made in view of the above-mentioned problems, and it is possible to expand the versatility of the inverter controller by making it compatible with various transmission methods, and to cope with an increase in the amount of information. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, the means taken by the present invention is such that the transmission control means of the inverter controller transmits and receives an address signal, a check signal, and a data signal as one transmission block. It is configured as follows.

Specifically, as shown in FIG. 1, the measures taken by the invention according to claim (1) are as follows:
6) and an outdoor unit (A) equipped with a heat exchanger (12).
The indoor unit (B) equipped with the above-mentioned heat exchangers (6) and (12
) is assumed to be an air conditioner in which an expansion mechanism (13) is interposed between the air conditioners.

A power converter (74) equipped with an inverter (2a) supplies power to the motor (MC) of the compressor (1) from the power source (7), and an outdoor controller (74) that controls the outdoor unit (A). 5) and the outdoor controller (5)
) is provided with an inverter controller (6) which is disconnectably connected to the inverter (2a) via a signal line (5a) and which controls the inverter (2a). Further, the outdoor controller (5) is provided with a first transmission control means (51) that includes a transmitting/receiving section (51c) and performs transmission and reception alternately for each transmission block with the inverter controller (6). It is being In addition, the above inverter controller (6
) includes an address signal, a check signal, and a data signal to form one transmission block, and is equipped with a transmitting/receiving section (61c) to alternately transmit and receive data for each transmission block with the outdoor controller (5). 2 transmission control means (61);
Specific signal output means (for outputting a specific signal to the second transmission control means (61) so that the second transmission control means (61) always transmits specific data in response to the transmission signal from the outdoor controller (5); 63a), and status signal output means for outputting a status signal to the second transmission control means (61) so that the second transmission control means 61) transmits the status data of the power converter (74) instead of the specific data. (63b) and abnormality detection means (63C) for determining whether or not the received signal received by the second transmission control means (61) is normal for each transmission block.

In addition, the means taken by the invention according to claim (2) are defined in claim (2).
In the invention of 1), one transmission block of the first transmission control means (51) in the outdoor controller (5) is composed of an address signal, a check signal, and a data signal, while the outdoor controller (5) has an address signal, a check signal, and a data signal. , specific signal output means (51) for outputting a specific signal to the first transmission control means (51) so that the first transmission control means (51) always transmits specific data corresponding to the specific data of the inverter controller (6); 53a), and the first transmission control means (51) so that the first transmission control means (51) transmits the state command data or information request data of the power converter (7'4) instead of the specific data. Special signal output means (
53b) and abnormality detection means (53c) for determining whether or not the received signal received by the first transmission control means (51) is normal for each transmission block.

Further, the means taken by the invention according to claim (3) is the inverter controller (6) in the invention according to claim (2).
) is configured to transmit one transmission block with the same address signal as the address signal of the one transmission block in response to one transmission block transmitted by the outdoor controller (5). On the other hand, the outdoor controller (5) receives the address signal of one transmission block transmitted by the first transmission control means (51) and the one received from the inverter controller (6) in response to the one transmission block. The configuration includes address determining means (53d) for determining whether or not the address signal of the transmission block matches.

Furthermore, the means taken by the invention according to claim (4) is that in the invention according to claim (1), (2) or (3), control power is directly supplied to the inverter controller (6). The power source (6b) is directly connected to the power source (6b), and an opening/closing means (6c) for opening/closing the power switch (52c) of the motor (MC) is provided.

(Operation) With the above configuration, the invention according to claim (1) has a power supply (7
The electric power supplied from the outdoor unit ( A) is an outdoor controller (5), and the inverter (2a) of the power converter (74) is controlled by an inverter controller (6).

First and second transmission control means (51) are provided between the two controllers (5) and (6).

(61) performs transmission and reception alternately for each transmission block to exchange control signals, such as operating signals, and the second transmission control means (61) of the inverter controller (6)
61) constitutes one transmission block with an address signal, a check signal, and a data signal, and is transmitted in, for example, 16 bits. Further, in the inverter collector roller (6), the specific signal output means (63a) outputs a specific signal in response to the transmission signal from the outdoor controller (5), and the second transmission control means (61) outputs specific data. Sending.

After that, when an overcurrent abnormality occurs in the inverter controller (6), the status signal output means (63b) outputs a status signal, and the second transmission control means (61) outputs the status data to the outdoor side instead of the specific data. Send to controller (5). When the inverter controller (6) receives a transmission signal from the outdoor controller (5), the abnormality detection means (63c) determines whether the transmission signal is normal or not.

Further, in the invention according to claim (2), the outdoor controller (5) constitutes one transmission block with address signals, check signals, and data signals corresponding to the inverter controller (6), and the specific signal output means The first transmission control means (51) constantly transmits specific data to the inverter controller (6) in response to the specific signal (53a), and in response to the specific data, the inverter controller (6) sends a specific data response signal. is being sent.

In the outdoor controller (5), when changing the frequency of the inverter (2a), the special signal output means (53b) outputs a special signal such as a status command signal,
The first transmission control means (51) transmits command data and the like instead of the specific data to the inverter controller (6).

Further, when the outdoor controller (5) receives a transmission signal from the inverter controller (6), an abnormality detection means (53c) determines whether the transmission signal is normal or not. Discrimination is based on signals.

Further, in the invention according to claim (3), the inverter controller (6) responds by setting the same address signal as the received transmission signal of the outdoor controller (6). When receiving one transmission block, the address determining means (53d) determines whether the address of the transmitted transmission block and the address of the received transmission block match or not, and determines whether the transmission is normal or not. There is.

Further, in the invention according to claim (4), the inverter controller (6) is directly supplied with power from the control power source (6b), and the motor (MC) power switch (52c)
) is controlled by an inverter controller (6).

(Effect of the invention) Therefore, according to the invention according to claim (1), the inverter controller (6) uses the address signal, the check signal, and the data signal as one transmission block, and the transmission signal of the outdoor controller (5) Since the inverter controller (6) can be applied to many types of outdoor controllers (5), its versatility can be expanded. Further, since it is possible to sufficiently cope with an increase in the amount of information, the inverter (2a) can be accurately controlled and comfortable air conditioning can be performed.

Further, according to the invention according to claim (2), one transmission block of the outdoor controller (5) is composed of an address signal, a check signal, and a data signal in correspondence with the inverter controller (6). , both controllers (5)
, (6), and can handle an increase in the amount of information, it is possible to improve air conditioning efficiency and comfort.

Further, according to the invention according to claim (3), since the outdoor controller (5) checks the sending and receiving addresses,
Transmission abnormalities can be detected accurately and highly reliable transmission can be performed.

Further, according to the invention according to claim (4), since the control @1 (6b) is directly connected to the inverter controller (6), the inverter controller (6) controls the motor (MC). The power switch (52c) can be controlled, and erroneous turning on of the power switch (52c) when the inverter controller (6) is abnormal can be reliably prevented.

(Example) Hereinafter, an example of the present invention will be described based on the drawings from FIG. 2 onwards.

First, FIG. 2 shows a refrigerant piping system of a multi-type air conditioner according to an embodiment of the present invention, in which (A) shows an outdoor unit, (
B) to (F) are indoor units connected in parallel to the outdoor unit (A).

The outdoor unit (A) has an output frequency of 30
A first compressor (the capacity of which is adjusted by an inverter (2a) that is variably switched every 10Hz in the range of ~70Hz)
1a) and an unloader (
2b), the capacity of which is adjusted in two stages: fully loaded (100%) and unloaded (50%), is connected in parallel via a check valve (1e). a variable capacity compressor (1); The first compressor separates oil in the gas discharged from the second compressors (la) and (lb), respectively. Second oil separator (4a), (4b)
, a four-way switching valve (5) that switches as shown in the solid line in the figure during cooling operation and as shown in the broken line in the figure during heating operation, and an outdoor heat exchanger (6) that functions as a condenser during cooling operation and as an evaporator during heating operation. ), two outdoor fans (6a) and (6b) attached to the outdoor heat exchanger (6), and an outdoor electric expansion valve that adjusts the refrigerant flow rate during cooling operation and throttles the refrigerant during heating operation. (8), a receiver (9) for storing liquefied refrigerant, and an accumulator (10) are built-in as main devices, and each of the devices (1) to (10) is connected to a refrigerant connecting pipe (11). connected to allow refrigerant flow. The indoor units CB) to (F) have the same configuration, and each has an indoor heat exchanger (12) that serves as an evaporator during cooling operation and a condenser during heating operation, and its fan (12a)... and the indoor heat exchanger (1
2) The liquid refrigerant branch pipes (11a) are each provided with an outdoor electric expansion valve (13) that adjusts the refrigerant flow rate during heating operation and throttles the refrigerant during cooling operation. After merging, the connecting pipe (11) is connected via the manual shutoff valve (17).
b) is connected to the outdoor unit (A). In other words, each of the above-mentioned devices is connected through refrigerant piping (11) so that refrigerant can flow therein, and a main refrigerant circuit (14) is configured to release useful heat to indoor air through heat exchange with outdoor air. It is configured.

Next, (11e) is a heating overload control bypass path that connects the discharge pipe and the liquid pipe side so that the discharge gas (hot gas) can be bypassed. An auxiliary heat exchanger (22) installed in a common air passage with the exchanger (6), a capillary (28), and an electromagnetic shut-off valve (24) that opens when the refrigerant is at high pressure are connected in series, and the outdoor heat exchanger ( 6) is connected in parallel, and when the high pressure rises excessively during cooling operation or heating operation, the electromagnetic on-off valve (24) is turned on or opened, and a part of the discharged gas is diverted to the main refrigerant circuit. He is trying to bypass from (14) to the heating overload control bypass path (11e). At this time, part of the discharged gas is condensed in the auxiliary heat exchanger (22) to support the capacity of the outdoor heat exchanger (6), and the capillary (28) is used to reduce the pressure loss on the outdoor heat exchanger (6) side. It is designed to maintain a balance between

Furthermore, (l1g) is the heating overload bypass path (11
A liquid injector bypass passage connecting the liquid refrigerant side piping of e) and the suction line of the main refrigerant circuit (14) to adjust the degree of superheating of suction gas during heating and cooling operation, the bypass passage (l1g) is an injection solenoid valve (
29) and a capillary (30) are interposed.

In addition, (31) cools the suction refrigerant through heat exchange between the suction refrigerant in the suction pipe (11) and the liquid refrigerant in the liquid pipe (11), and reduces the degree of superheating of the refrigerant in the connecting pipe (1l b). A suction tube heat exchanger to compensate for the rise.

Here, many sensors are arranged in this air conditioner, (THl)... is a room temperature thermostat that detects each room temperature, (TH2)... and (TH3)
... is an indoor liquid temperature sensor and an indoor gas temperature sensor that detect the temperature of the refrigerant in the liquid side and gas side pipes of the indoor heat exchanger (12), respectively, and (TH4) is the discharge of the compressor (1). A discharge pipe sensor (TH5) detects the frost formation state from the outlet temperature of the outdoor heat exchanger (6) during heating operation, and (TH6) a discharge pipe sensor that detects the pipe temperature. It is arranged in the suction pipe (11) on the downstream side,
The suction pipe sensor (TH7) that detects the suction pipe temperature is placed at the air suction port of the outdoor heat exchanger (6), and the outside air temperature sensor (Pl) that detects the suction air temperature detects the low refrigerant pressure during cooling operation. In other words, it is a pressure sensor that detects a saturation temperature Te corresponding to evaporation pressure, and detects a saturation temperature Tc corresponding to high pressure, that is, condensation pressure, during heating operation.

In addition to the above-mentioned main devices, various auxiliary devices are provided. (1f) is the bypass path (
11C) is an unloader solenoid valve that is "open" when the second compressor (1b) is stopped and in an unloaded state, and "closed" when it is fully loaded; 11c) interposed capillary, (21)
is a pressure equalizing electromagnetic valve that is installed in the pressure equalizing hot gas bypass line (11d) connecting the discharge pipe and the suction pipe, and opens for a certain period of time before restarting when the compressor (1) is stopped due to thermo-off state, etc. The valves (33a) and (33b) are connected to the first valve through the capillary (32a) and (32b), respectively. Second oil separator (4a).

(4b) to 1st. This is an oil return pipe for returning oil to the second compressors (la) and (lb).

In the figure, (HPS) is a high-pressure switch for protecting the compressor, (SP) is a service port, and (GP) is a gauge boat.

The above-mentioned solenoid valves and sensors, together with each main equipment, are equipped with an indoor controller (4), as shown in FIG.
It is connected to an outdoor controller (5) and an inverter controller (6).

The indoor controller (4) includes a control power source (41).
) is connected, and the remote control switch (42) (hereinafter referred to as the remote control (42)) is connected to the outdoor remote controller (5) via the signal line (4a), and the outdoor remote controller (5) is connected via the signal line (4b). connected. Although not shown, the indoor controller (4) sends and receives operating signals, temperature setting signals, etc. to and from the remote controller (42), and also transmits and receives operation signals, temperature setting signals, etc. to the indoor electric expansion valve (13), the indoor fan (12a), etc. is configured to control.

On the other hand, a three-phase AC power source (7) is connected to the motor (MC) of the first compressor (1a) via a motor drive circuit (71), and the motor drive circuit (71) is connected to a power switch. (52c), a rectifier circuit (72) that converts AC power to DC power, a filter circuit (73) having a DC reactor (73a) and a smoothing capacitor (73b),
An inverter (2a) that converts DC power to AC power is connected in sequence, and the control power is transmitted to the compressor motor (MC).
is configured to supply. Then, the rectifier circuit (72), the filter circuit (73) and the inverter (2a
) constitutes a power converter (74), and an instantaneous overcurrent detector (73c) is connected to the feedback side of the filter circuit (73).
), while a current limiting circuit (75) is installed in the R phase and T phase of the power source (7) by bypassing the power switch (52c).
is connected, and the current limiting circuit (75) is provided with a resistor (75a) and a b-contact open/close switch (84).

Further, an inverter controller (6) is connected to the inverter (2a) via a signal line (6a), and a control power source (6) is connected to the inverter controller (6).
b) is connected, and the instantaneous overcurrent detector (73c)
The detected current and the power supply current of the motor drive circuit (71) are input, and the outdoor controller (5) and the signal line (5a)
connected via. The outdoor controller (5) sends and receives control signals to and from the indoor controller (4) and the inverter controller (6), and also receives various sensor signals (not shown) to control the outdoor electric expansion valve. (8) and outdoor fans (6a), (6b), etc., while the inverter controller (6) controls the inverter (2a) based on a control signal from the outdoor controller (5). and is configured to control the capacity of the first compressor (1a). Further, control switches (5a) and (6c), which are means for opening and closing the power switch (52c), are connected in series to the outdoor controller (5) and the inverter controller (6).

FIG. 4 is a detailed circuit diagram showing a transmission system between the outdoor controller (5) and the inverter controller (6).

The first and second transmission control circuits (51) and (61), which are the transmission control means configured in 6), are disconnectably connected to each other by a three-wire signal line (5a) via a connector (8). There is. The image transmission control circuit (51) (61) includes a transmitter (51a) having a digital transistor and a photocoupler;
(61a) and a receiving section (51b) having a photocoupler.
, (61b), each with an I10 boat (52).

(62) to the microcomputers (53), (63), and the transmitting/receiving section (51a), (61a) and the receiving section (51b), (61b)
1c) and (61c) are configured.

Next, a transmission method, which is a feature of the present invention, between the two controllers (5) and (6) will be explained.

The transmission system between the two controllers (5) and (6) is a start-stop synchronization half-duplex system, as shown in FIG. 5(a).

As shown in (b), one transmission block is composed of 16 bits, and signals are exchanged by alternately transmitting and receiving the one transmission block. And the one transmission block is
1st character (CHI) and 2nd character (CH2)
It consists of each character (CHI), (CH2
) is the start bit.

It has a stop bit and a parity bit, and the first character (CHI) is the first of 4 bits indicating an address signal.
It consists of a block (BLI) and a 4-bit second block (BL2) indicating a check signal, and a second character (CH2) contains a third block (BL3) and a fourth block addressed to 4 bits indicating a data signal. It is composed of a block (BL4), and the parity check performed at the parity pit is configured to have an even parity.

Then, the first transmission control circuit (51) of the outdoor controller (5) transmits a control signal for each transmission block based on the command signal of the microcomputer (53), and the second transmission control circuit of the inverter controller (6) The control circuit (61) is configured to respond to one transmission block of the outdoor controller (5) and output a response signal of one transmission block in response to a command signal from the microcomputer (63). Furthermore, the microcomputer (53) of the outdoor controller (5) includes a specific signal output means (53a), a special signal output means (53b), an abnormality detection means (53c), and an address determination means (53d). ing. The specific signal output means (53a) is a sixth
As shown in Figure (a), for example, the third block (B L
3), set a specific data signal indicating whether it is on standby or not, and whether it is running or stopping, set an address signal corresponding to the data signal in the first block (BLI), and set the address signal corresponding to the data signal in the first block (BLI).
BL2) Furnace tube 1 block (BLI) and 3rd block (B
A check signal of the two's complement of the sum of L3) and the fourth block (B L43) is set, and the first transmission control circuit (5
1) outputs a specific signal to the first transmission control circuit (51) so that it is always transmitted. Further, as shown in FIG. 6(b), the special signal output means (53b) sends a data signal of the inverter frequency to the third and fourth blocks (BL3) and (BL4), and the data signal of the inverter frequency to the first block (BLI). The address signal corresponding to the data signal is sent to the second block (BL
Similarly to the specific signal output means (53a), two's complement check signals are set in 2), and the first transmission control circuit (51) interrupts the state command data into the specific signal instead of the specific data. A command signal, which is a special signal, is output to the first transmission control circuit (51) for transmission, and in addition to the status command data, an information request signal in the event of an abnormality is output.

Furthermore, the abnormality detection means (53c) performs a parity check using parity pits, and calculates the sum of each block (BLI) to (BL4) of one transmission block transmitted by the inverter controller (6), It is configured so that it is determined to be normal when it becomes normal. Further, the address determination means (53d) uses an address signal (set value of the first block (BLl)) of one transmission block to be transmitted.
and the address signal of one transmission block (
It is configured to determine whether or not they match the set value of the first block (BLI), and if they do not match, for example, a lamp indicating a transmission error is turned on.

On the other hand, the microcomputer (63) of the inverter controller (6) includes a specific signal output means (63a), a status signal output means (63b), and an abnormality detection means (63c). The specific signal output means (63a) outputs a specific signal so that the second transmission control means (61) always transmits specific data in response to specific data from the specific signal output means (53a) of the outdoor controller (5). is output to the second transmission control circuit (61), and as shown in FIG. 6(a), the first block (BLl) of one transmission block responds to the add signal of the outdoor controller (5). and set the same address signal to the third and fourth blocks (BL3).
, (BL4) is set with a data signal indicating normality, etc., and the second block (BL2) is set with the first . Third and fourth blocks (BLl), (BL3), (BL4
) is configured to set the two's complement of the sum.

Specific data is constantly transmitted and received between the two controllers (5) and (6).

Further, the status signal output means (63b) transmits the status signal to the second transmission control circuit (61) so that the second transmission control circuit (61) transmits various status data such as the inverter frequency and abnormal status instead of the specific data. For example, when transmitting inverter frequency data, as shown in FIG. 6(b), the outdoor controller (
It is configured to transmit the same address signal in response to a command signal from the special signal output means (53b) of 5). Furthermore, when transmitting abnormal data such as overcurrent, the status signal output means (63b) transmits the abnormal data to the third block (B L 3) of one transmission block, as shown in FIG. 6(C). While setting the signal, the first block (B
LI) is configured to set the same address signal as the address of the transmission signal of the outdoor controller (5),
The second block (B L 2) is configured to set a two's complement number similarly to the specific signal output means (63a), that is, it is configured to set an abnormal number at the same address as the specific signal that is constantly being transmitted. It is adapted to transmit a status signal.

The abnormality detection means (63c) includes an outdoor controller (
It is configured to perform a parity check in the same way as the abnormality detection means (53c) in 5), and calculate the sum of each block of one received transmission block, and if the sum becomes zero, it is determined to be normal.

Although not shown, the microcomputer (63) of the inverter controller (6) stores the operating state in a RAM, and is configured to latch the operating frequency, etc. at the time of abnormality when an abnormality occurs. An abnormality display section (64) is provided and is configured to display abnormalities such as overcurrent and temperature abnormality.

Next, the operation of this air conditioner will be explained.

Therefore, to explain the refrigerant circulation operation, in Fig. 2, during cooling operation, the four-way switching valve (2) switches to the solid line side in the figure, and the electromagnetic on-off valve (24) of the auxiliary heat exchanger (22) is always turned on. The refrigerant compressed by the compressor (1) is condensed in the outdoor heat exchanger (6) and the auxiliary heat exchanger (22), and then passes through the connecting pipe (1l b) to each indoor unit (B) to (F). )
It is branched and sent to. In each indoor unit (B) to (F), the pressure is reduced by each indoor electric expansion valve (13), . . . , and after being evaporated in each indoor heat exchanger (12), .
It returns to the outdoor unit (A) in a gaseous state and is circulated so that it is sucked into the compressor (1).

In addition, during heating operation, the four-way switching valve (5) switches to the dashed line side in the figure, and the flow of refrigerant is reversed to that during cooling operation, and the refrigerant compressed by the compressor (1) is used to heat each room. Exchanger (1
2), ..., condensed, merged and flowed in liquid state to the outdoor unit (A), reduced pressure by the outdoor electric expansion valve (8), ..., and evaporated in the outdoor heat exchanger (6). Compressor (1
).

Next, the control operation will be explained. First, use the remote control (4
When the operation switch (not shown) in 2) is turned on, the operation command signal is sent from the remote controller (42) to the indoor controller (
4), and the indoor controller (4) outputs an operation command signal to the outdoor controller (5) if there is no abnormality in the controlled sensor, etc. Subsequently, the outdoor controller (5) outputs a driving command signal to the inverter controller (6) if there is no abnormality in the sensor to be controlled, etc., and the inverter controller (6) determines that there is no abnormality in the heat dissipation fin sensor, etc. Turn on the on/off switch (84) of the current limiting circuit (75) to charge the smoothing capacitor (73b) for 5 seconds, then turn off the on/off switch (84) and turn on the control switch (
6c) to turn on the power switch (52c) and set the motor drive circuit (71) to a driveable state.

Thereafter, the inverter controller (6) uses the frequency command signal from the outdoor controller (5) to control the inverter (
2a) to control the motor (MC) to a predetermined rotation speed.

Next, the outdoor controller (
5) and the inverter controller (6) will be explained based on the timing chart of FIG.

Since the transmission method for this signal exchange is half-duplex, the first transmission control circuit (51) of the outdoor controller (5)
One transmission block is made up of inverter controller (
6), the inverter controller (6)
The second transmission control circuit (6) transmits one transmission block with 16 bits after 10 m5ec, and repeats the signal exchange in sequence.

After the power is turned on, the outdoor controller (5) uses the specific signal output means (53a) to set a specific data signal such as operation to the third pro 7 (B L 3) of one transmission block, and sets the specific data signal to the specific data. The corresponding address signal, i.e.
operation (OH) to the first block (BLI),
The checksum signal, which is a two's complement number, is transferred to the second block (B
L2) and the first transmission control circuit (51) transmits.

This one transmission block is used as an inverter controller (6)
The specific signal output means (63a) of the inverter controller (6) sends the same address signal (operation OH) as the transmission signal of the outdoor controller (5) to the first block (BLI) of one transmission block. set,
Specific data is set in the third and fourth blocks (BL3) and (BL4), a check signal (check sum) is set in the second block (BL2), and the second transmission control circuit (61) It is sent to the outdoor controller (5).

The outdoor controller (5) has a power of 10 to 100.
After m5ec, the above-mentioned specific data is transmitted again, and the above-mentioned specific data is constantly transmitted and received between both controls (5) and (6).

After that, due to changes in the indoor load, etc., the inverter (2a
), when changing the frequency of the outdoor controller (5)
As shown in FIG. 6(b), the special signal output means (5
3b) outputs a frequency command signal, which is a special signal, to the first transmission control circuit (51), sets an address signal, a check signal, and a data signal corresponding to the command signal in one transmission block, and then outputs the frequency command signal, which is a special signal, to the inverter controller (6). Send to.

The inverter controller (6) controls the inverter (2a) based on the frequency command signal, and the status signal output means (63b) outputs the same status signal as the received frequency command signal. The same address signal, check signal, and frequency signal as the above address signal are set in one transmission block, and the second transmission control circuit (61) transmits the same to the outdoor controller (5).

Further, when an abnormal signal such as overcurrent or temperature abnormality is input to the inverter controller (6), the status signal output means (63b) of the inverter controller (6)
As shown in FIG. 6(c), the outdoor controller (
5) When responding to the specific data, an abnormality and standby status signal is set in the third block (BL3) of one transmission block, and the received address signal of the outdoor controller (5) and the received outdoor controller (5) are set in the first block (BLI). The same address signal is set, a two's complement number is set in the second block (B L 2), and the second transmission control means (61) transmits to the outdoor controller (5). This abnormality signal informs the outdoor controller (5) of the abnormality. after that,
The outdoor controller (5) has special signal output means (53
b) outputs a request signal such as the operating frequency at the time of abnormality and information stored in the RAM of the inverter controller (6), and the first transmission control circuit (51) outputs a request signal such as the operating frequency at the time of abnormality and information stored in the RAM of the inverter controller (6), and the first transmission control circuit (51) transmits the request signal to the inverter controller (6) with a predetermined address. ). On the other hand, in the inverter controller (6), the status signal output means (63b) outputs a predetermined status signal,
The second transmission control circuit (61) transmits the same address to the outdoor controller (5).

In each of the controllers (5) and (6), a parity check is performed when receiving one transmission block, and the abnormality detection means (53c) and (63c)
The sum of the block (BLI) to the fourth block (BL4) is calculated and checked to see if it becomes zero. In other words, the second block (BL2) has the first... Third and fourth blocks (BLI).

Since the two's complement of the sum of (BL3) and (BL4) is set, if it becomes zero, it is judged as normal transmission, and if it becomes non-zero, it is judged as abnormal transmission, and in case of abnormality, retransmission etc. is performed, and if it does not become zero, then Displays abnormalities, etc. In addition, when the outdoor controller (5) receives one transmission block, the address determining means (53d) determines whether the transmitted address and the received address match or not, and if they do not match, Resend as abnormal, for example, 30
If the same signal is sent and they do not match, it is determined that the transmission is abnormal and an abnormality display is performed.

In addition, when the above frequency command is given, if the outdoor controller (5) does not match the transmitted content and the received content,
If the data do not match even after retransmission, for example, 30 times, it is determined that the transmission is abnormal.

Furthermore, when an abnormality such as overcurrent occurs, the inverter controller (6) not only displays the abnormality but also displays the details of the abnormality on the abnormality display section (64). Also displays the abnormality contents.

Therefore, since the inverter controller (6) has an address signal, a check signal, and a data signal as one transmission block and responds to the transmission signal from the outdoor controller (5), the inverter controller (6) has multiple transmission blocks. Since the present invention can be applied to various types of outdoor controllers (5), versatility can be expanded. Further, since it is possible to sufficiently cope with an increase in the amount of information, the inverter (2a) can be accurately controlled and comfortable air conditioning can be performed.

In addition, since one transmission block of the outdoor controller (5) corresponds to the inverter controller (6) and consists of an address signal, a check signal, and a data signal, the communication between both controllers (5) and (6) is Since a large amount of signals can be exchanged and the amount of information can be increased, air conditioning efficiency and comfort can be improved.

Furthermore, since the outdoor controller (5) checks the sending and receiving addresses, transmission abnormalities can be accurately detected and highly reliable transmission can be performed.

In addition, since the control power source (6b) is directly connected to the inverter controller (6), the inverter controller (6) can be used to switch the motor (MC) power switch (
52c), and the power switch (52c
) can be reliably prevented from being erroneously inserted.

Although the present embodiment has been described with respect to a multi-type air conditioner, the present invention is not limited to a multi-type air conditioner.

Furthermore, one transmission block of the outdoor controller (5) and the inverter controller (6) is not limited to 16 bits.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention. Figures 2 to 6 show an embodiment of the present invention, with Figure 2 being a refrigerant piping system diagram, Figure 3 being a schematic configuration diagram showing the control system, and Figure 4 showing the outdoor controller and the inverter controller. Electrical circuit diagram showing the transmission system of Figure 5(a), (
b) is an explanatory diagram showing one transmission block, Fig. 6(a), (
b) and (c) are timing diagrams showing signal exchange. (A)...Outdoor unit, (B)...Indoor unit, (1)...Compressor, (2a)...Inverter, (5)...Outdoor controller, (6)...・Inverter controller, (6b), (
7) Power supply, (6c) Control switch, (51) First transmission control circuit, (53g), (63a) Specific signal output means, (5
3b)...Special signal output means, (53c), (63c)-abnormality detection means, (53d).
... Address determination means, (61) ... Second transmission control circuit, (63b) ... Status signal output means, (74) ... Power converter.

Claims (4)

[Claims] (1) An outdoor unit (A) equipped with a compressor (1) and a heat exchanger (6) and an indoor unit (B) equipped with a heat exchanger (12) are connected by a refrigerant pipe (11). In addition, an expansion mechanism (1) is installed between the heat exchangers (6) and (12).
3), a power converter (7) that is equipped with an inverter (2a) and supplies power from a power source (7) to the motor (MC) of the compressor (1).
4), an outdoor controller (5) that controls the outdoor unit (A), and an outdoor controller (5) that is connectably connected to the outdoor controller (5) via a signal line (5a) and controls the inverter (2a). an inverter controller (6), and a transmitting/receiving unit (
51c) for alternately transmitting and receiving data to and from the inverter controller (6) for each transmission block;
), one transmission block is configured by an address signal, a check signal, and a data signal, and a transmission/reception unit (61c
), the second transmission control means (61) performs transmission and reception alternately for each transmission block with the outdoor controller (5)
), and a second transmission control means provided in the inverter controller (6) so that the second transmission control means (61) always transmits specific data in response to a transmission signal from the outdoor controller (5). (61) a specific signal output means (63a) for outputting a specific signal to the inverter controller (6);
Status signal output means (for outputting a status signal to the second transmission control means (61) so that the transmission control means (61) transmits the status data of the power converter (74) instead of the specific data;
63b) and a second controller provided in the inverter controller (6).
Abnormality detection means (63c) for determining whether the received signal received by the transmission control means (61) is normal for each transmission block.
An operation control device for an air conditioner, comprising: (2) In the operation control device for an air conditioner according to claim (1), one transmission block of the first transmission control means (51) in the outdoor controller (5) is composed of an address signal, a check signal, and a data signal. On the other hand, the outdoor controller (5) includes a second transmission control means (
specific signal output means (53a) for outputting a specific signal to the first transmission control means (51) so that the first transmission control means (51) always transmits specific data corresponding to the specific data of the inverter controller (6); special signal output means for outputting a special signal to the first transmission control means (51) so that the transmission control means (51) transmits the state command data or information request data of the power converter (74) instead of the specific data; (53b), and the reception signal received by the first transmission control means (51) is 1.
Abnormality detection means (
53c). An operation control device for an air conditioner. (3) In the operation control device for an air conditioner according to claim (2), the second transmission control means (61) of the inverter controller (6) responds to one transmission block transmitted by the outdoor controller (5). and is configured to transmit one transmission block using the same address signal as the address signal of the one transmission block. In response to the address signal of the transmission block and the one transmission block, the inverter controller (
6) Address determination means (53d) for determining whether or not the address signal of one transmission block received from
) An operation control device for an air conditioner. (4) In the operation control device for an air conditioner according to claim (1), (2) or (3), the inverter controller (6) is provided with a power source (6b) so that control power is directly supplied to the inverter controller (6). An operation control device for an air conditioner, characterized in that an opening/closing means (6c) is connected directly to the motor (MC) and opens/closes a power switch (52c) of a motor (MC).