JP2639149B2 - Operation control device for air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an operation control device for a multi-type air conditioner including a plurality of indoor units, and more particularly to a measure for setting an operation mode.

(Prior Art) In general, as disclosed in Japanese Patent Application Laid-Open No. Sho 59-210249, an operation control device in an air conditioner includes a plurality of indoor control units that control an indoor unit and an outdoor control unit that controls an outdoor unit. There is a configuration in which a control unit is connected via a signal line, a remote controller is connected to the indoor control unit, and a centralized controller is connected to the outdoor control unit.

The outdoor control unit transmits and receives various control signals such as operation signals and mode signals to and from each indoor control unit, and the outdoor control unit transmits and receives control signals to and from a centralized controller. The air conditioning operation is controlled by controlling the air conditioner and each electric expansion valve.

(Problems to be Solved by the Invention) In the operation control device for an air conditioner described above, the centralized controller is provided with an operation mode switch, and the centralized controller transmits a mode signal to the outdoor control unit to change the operation mode. I am trying to set it.
However, in this case, the operation mode is set only in one place such as a management room, and there is a problem that operability is poor.

Therefore, each remote control is provided with an operation mode switch,
It is conceivable to set the mode. However, if the mode change can be performed by each remote controller, the mode change may be performed on the other side immediately after the mode change is performed on the other side, and there is a problem that the driving mode is not specified and the comfort is poor. In particular, the operation mode is changed in the middle of winter and summer, and the requested mode is often different depending on the installation position of the indoor unit such as the window side. Therefore, if the mode can be changed with any remote control, the operation mode will not be determined. Will not be.

Further, if the mode can be changed only by one remote controller, there is a portion where the mode cannot be changed due to the change of the partition, and the operability is inferior as in the operation by the centralized controller.

The present invention has been made in view of the above, and an object of the present invention is to make it possible to easily change a driving mode and to prevent a decrease in comfort.

(Means for Solving the Problems) In order to achieve the above object, the present invention takes the following measures:
A plurality of codes that determine the setting mode of the operation mode are provided, and the mode can be changed according to the codes.

Specifically, as shown in FIG. 1, the means taken by the invention according to claim 1 includes an outdoor unit (A) and a plurality of indoor units connected in parallel to the outdoor unit (A). (B, B,...), And the indoor unit (B) is provided with a refrigerant circuit (3) having a variable refrigerant flow direction so as to be in a cooling operation state or a heating operation state. ,...), And an external control unit for controlling the outdoor unit (A) and transmitting and receiving a control signal to and from the indoor control unit (8). A control signal is transmitted and received between (7) and the indoor control unit (8), and the indoor unit (B)
It is assumed that the operation control device of the air conditioner includes one or two or more remote controllers (9) for operating the operation.

Then, the remote control (9) and the indoor control unit (8,
8,...) And the external control unit (7), wherein the indoor control unit (8) specifies a control mode for setting the operation mode of the indoor unit (B). Control code means (11) is provided.

The control code means (11) includes an indoor unit (B) according to a command signal output from the external control unit (7).
Indoor unit (B) according to an external code for changing the operation mode of the vehicle and a command signal output from a specific remote controller (9)
A remote control code set for a specific indoor control unit (8), and a state in which the external code and the remote control code are not set, and a state in which the remote control code can be set Is provided at least.

In addition, a code changing means (12) for changing each code of the control code means (11) is provided.

According to a second aspect of the present invention, when only one remote controller (9) is provided in the first aspect, the remote controller (9) and the remote controller (9) are connected. Specific code means (13) for setting a remote control code for one indoor control unit (8) is provided.

The means of the invention according to claim 3 is the invention according to claim 1 or 2, wherein the automatic mode for automatically switching between the cooling mode and the heating mode independently by the indoor control unit (8) is controlled by the remote control code. A configuration is provided with mode setting switching means (72) for setting the operation mode.

The means adopted by the invention according to claim 4 is the control code means (1) according to the invention described in claim 1, 2 or 3.
1) includes a specific remote control (9) for setting the operation mode
Is a control code for setting the operation mode of the indoor unit (B) to one of the cooling mode, the heating mode, and the automatic mode in accordance with the command signal output by the indoor control unit (8). Has a sub remote control code for switching between the cooling mode and the heating mode.

When the specific indoor control unit (8) to which the remote control code is set causes a transmission error, the specific remote control (9) replaces the specific indoor control unit (8).
Remote control (9) is connected to the other indoor control unit (8) to which the external code is set in order to enable the operation mode of the indoor unit (B) to be set according to the command signal of Is provided for setting an abnormal code.

(Operation) In the present invention according to the first aspect of the present invention, an operation signal such as an operation signal and a set temperature signal is input from the remote controller (9), and the operation signal and the like are transmitted to the indoor control unit (8) and the external control unit. (7) to control the outdoor unit (A) and the indoor unit (B).

Each code of the control code means (11) is exchanged between the external control unit (7), the indoor control unit (8), and the remote control (9), and the indoor control unit (8) and the remote control ( The control contents of 9) are set. That is, when the indoor control unit (8) to which the external code is transmitted is operated by the external control unit (7), and the indoor control unit (8) to which the remote control code is transmitted is operated by the remote control (9), on the other hand, Only the remote controller (9) that has received the code sets the mode. This code is changed by the code changing means (12), and the mode of the indoor control unit (8) is set by the external control unit (7) or the remote control (9).

In the present invention according to claim 2, when only one remote controller (9) is used, the operation mode can be automatically set by the remote controller (9).

In the invention according to claim 3, it is possible to set an automatic mode for automatically switching between the cooling mode and the warming mode, and to delete the mode when the automatic mode is unnecessary. Become.

In the invention according to claim 4, the indoor unit (B)
When the indoor control unit (8), which sets the operation mode of the above, causes a transmission error, the other code having the external code is set.
The sub-remote control code is transmitted to the indoor control unit (8), and the operation mode is set by the remote control (9) via the indoor control unit (8) in which the sub-remote control code is set.

(Effect of the Invention) Therefore, according to the invention of claim 1, the code controlled by the external control unit (7), the specific remote control (9)
Since the setting mode of the operation mode is determined by providing a code or the like controlled by the above, the mode can be changed by the specific remote controller (9), so that the operability can be improved. In addition, since the mode can be changed only with the specific remote controller (9) and the specific remote controller (9) can be changed, the driving mode can be reliably specified, and the comfort can be improved. In addition, it is possible to cope with a change in the partition and improve operability.

According to the second aspect of the invention, in the case of one remote controller (9), the mode can be automatically changed by the remote controller (9), so that the operability can be further improved.

According to the third aspect of the present invention, since the setting of the automatic mode can be made unnecessary, the indoor unit (B)
The operation mode according to the request can be set accurately.

Further, according to the invention according to claim 4, since the operation mode can be changed even at the time of transmission abnormality, an accurate operation mode can be set.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 2, (X) is a multi-type in which a plurality of (five in the drawing) indoor units (B, B,...) Are connected in parallel to one outdoor unit (A). Air conditioner.

The outdoor unit (A) includes a compressor (1) and two outdoor heat exchangers (2a, 2b), and the compressor (1) is a first compressor (1) whose capacity is controlled by an inverter. 1a) and a second compressor (1b) whose capacity is controlled by an unloading mechanism. The discharge side of the first compressor (1a) is connected via an oil separator (1d) to the second compressor (1b). ) Is connected to the high-pressure gas line (31) of the refrigerant circuit (3) via the one-way valve (1c) and the oil separator (1e), and the suction side is connected to the low-pressure gas line (32). . Further, return pipes (1f, 1g) of the oil separators (1d, 1e) are connected to the suction side of the compressor (1), and an oil equalizing pipe (1h) is connected between the compressors (1a, 1b). ) Is provided.

The outdoor heat exchangers (2a, 2b) are provided in parallel with the compressor (1), and one end of each of the outdoor heat exchangers (2a, 2b) is a four-way switching valve. (21a, 21b)
Are connected switchably to the high-pressure gas line (31) and the low-pressure gas line (32) through gas pipes (22a, 22b) provided with At the end, the liquid pipes (33a, 33b) of the liquid line (33) in the refrigerant circuit (3)
Is connected.

When the outdoor heat exchangers (2a, 2b) function as condensers, the four-way switching valves (21a, 21b) are switched to solid lines in the figure, and the gas pipes (22a, 22b) are connected to the high pressure gas line. (3
1), and conversely, when each outdoor heat exchanger (2a, 2b) functions as an evaporator, it is switched to the broken line in the figure and the gas pipe (22a,
22b) is configured to communicate with the low pressure gas line (32). One port of the four-way switching valve (21a, 21b) has a connection pipe (24) provided with a capillary (23a, 23b).
a, 24b) to the gas pipes (22a, 22b) between the four-way switching valves (21a, 21b) and the low-pressure gas line (32).

Further, a gas pipe (22a, 22
A one-way valve (4) is provided downstream of the connection of (b), and an accumulator (41) is provided downstream of the connection of the gas pipes (22a, 22b) in the low-pressure gas line (32). Between the gas lines (31, 32) and the equalizing bypass (4
2) is connected. The equalizing bypass passage (42) is provided with an on-off valve (42a) and a flow control capillary (42b), and has one end connected to a gas pipe (22) in the high-pressure gas line (31).
a, 22b) and the compressor (1), and the other end is connected between the connection of the gas pipes (22a, 22b) in the low-pressure gas line (32) and the accumulator (41). I have.

Each liquid pipe (33a, 33) in the liquid line (33)
b) is connected to the receiver (43) and the liquid refrigerant is joined,
The main liquid pipe (33) of the liquid line (33) is connected to the receiver (43).
c) is connected. Further, an outdoor electric expansion valve (25a, 25b) is interposed in each of the liquid pipes (33a, 33b), and the outdoor electric expansion valve (25a, 25b) is connected to the outdoor heat exchanger (2a, 2b). Is configured to reduce the pressure of the liquid refrigerant when functioning as an evaporator, and to adjust the flow rate of the liquid refrigerant when functioning as a condenser.

In addition, (26) is an outdoor fan arranged close to the outdoor heat exchangers (2a, 2b), and (44) is a low-pressure gas line (32).
And a main heat pipe (33c).

One end of a hot gas bypass line (45) is connected to a downstream side of the one-way valve (4) in the high-pressure gas line (31), and the other end of the hot gas bypass line (45) is connected to a receiver (43). And a hot gas on-off valve (45a) and a capillary (45b) for adjusting the flow rate of the hot gas. The hot gas on-off valve (45a) opens and guides the hot gas to the receiver (43) when the outside air temperature falls below a predetermined temperature during the cooling operation of the indoor unit (B). The line (33) is maintained at a predetermined pressure.

On the other hand, each of the high-pressure gas lines (31), the low-pressure gas lines (32), and the main liquid pipe (33) are disposed to extend to the indoor side, and are each provided with a high-pressure branch through a flow divider (31a, 32a, 33d). ), A low-pressure branch pipe (32b, 32b, ...) and a liquid branch pipe (33e, 33e, ...), and each of the branch pipes (31b, 32b, ...).
33e) is connected to each indoor unit (B, B, ...).

Each of the indoor units (B, B,...) Includes an indoor heat exchanger (5) and an indoor electric expansion valve (51). The indoor units (B, B, ...) are configured to be switchable between a cooling operation and a heating operation, and the three third indoor units (B, B, ...) are in the same operation mode. The refrigerant circulation system is divided into three different sections (D1, D2, D3), and one indoor unit (B) is provided in the first and second sections (D1, D2), In the third section (D3), three indoor units (B) are provided in parallel.

One end of the indoor unit (B) in the first and second sections (D1, D2) has a liquid branch pipe (33e) via an indoor electric expansion valve (51), and the other end has a gas pipe (5a). The low-pressure branch pipe (32b) and the high-pressure branch pipe (31b) are connected via an internal electric expansion valve (51) and a liquid pipe (5b) at one end of the indoor unit (B) in the third section (D3). And a liquid branch pipe (33e) via a flow divider (58a), and a low pressure branch pipe (32b) and a high pressure branch pipe (31b) at the other end via a gas pipe (5a) and a flow divider (58b). It is connected.

Opening / closing valves (52, 53) are provided at each end of the high-pressure branch pipe (31b) and the low-pressure branch pipe (32b), and the open / close valves (52, 53) are controlled to open / close. The inner heat exchanger (5) is configured to be switchably connected to a high-pressure gas line (31) and a low-pressure gas line (32), and when the indoor heat exchanger (5) functions as an evaporator (cooling). At low pressure side on-off valve (53)
However, when functioning as a condenser (during heating), the high-pressure side on-off valves (52) are each opened.

Further, the liquid branch pipe (33) on the indoor unit (B, B, ...) side
e) is connected to a low-pressure bypass passage (54). The low-pressure bypass passage (54) is connected to the on-off valve (5) in the low-pressure branch pipe (32b).
3), a bypass valve (54a) and a capillary (54b) are interposed, and a pipe heat exchanger (54c) is formed between the pipe and the liquid branch pipe (33e). The liquid refrigerant flowing out of the inner heat exchanger (5) is prevented from being flushed. In addition, the high pressure branch pipe (31
A high-pressure bypass (55) is connected to the upstream side of the on-off valve (52) in b), and the high-pressure bypass (55) is connected to the gas pipe (5a) and a capillary (55a) for adjusting the flow rate. ) To bypass the condensate accumulated in the high-pressure branch pipe (31b) or the like during cooling.

Then, each of the on-off valves (52, 53) and both bypass passages (5
4,55) are housed together in the kit and the branch unit (5
6) is formed, while the compressor (1), the outdoor heat exchangers (2a, 2b), and the indoor heat exchangers (5, 5,...) Are a high pressure gas line (31) and a low pressure gas line ( 32) and liquid line (3
3) to constitute the refrigerant circuit (3).

Incidentally, reference numeral (57) denotes an indoor fan arranged close to the indoor heat exchanger (5).

In the refrigerant circuit (3) described above, when each indoor unit (B, B,...) Performs the cooling operation, the two-way switching valves (21a, 21b) of the outdoor unit (A) are switched to the solid lines in FIG. While the pipes (22a, 22b) communicate with the high-pressure gas line (31), the indoor units (B, B, ...) close the high-pressure on-off valve (52), open the low-pressure on-off valve (53), and open the gas pipe. (5a) is communicated with the low pressure branch pipe (32b).

In this state, the high-pressure gas refrigerant discharged from the compressor (1) flows into each outdoor heat exchanger (2a, 2b) and condenses,
The condensed liquid refrigerant flows through the liquid line (33) to each indoor unit (B, B,...), And the indoor electric expansion valves (51, 51,...)
, And evaporate in each indoor heat exchanger (5,5,…)
It flows through the low pressure gas line (32) and returns to the compressor (1).

On the other hand, when the indoor unit (B, B,...) Performs the heating operation, the refrigerant flows in the opposite direction to the cooling operation, and switches the four-way switching valve (21a, 21b) of the outdoor unit (A) to the broken line in FIG. The high pressure side on-off valve (52) is opened, the low pressure side on-off valve (53) is closed, and the refrigerant condenses from the high pressure gas line (31) in the indoor heat exchanger (5) and flows through the liquid line (33). , Outdoor electric expansion valve (25a,
It expands in 25b), evaporates in the outdoor heat exchangers (2a, 2b), and returns to the compressor (1).

At the time of the cooling operation, for example, the two open / close valves (52, 53) in one indoor unit (B) are switched to the heating operation, and conversely, at the time of the heating operation, for example, one indoor unit ( In B), the two on-off valves (52, 53) are switched to perform cooling operation, so-called simultaneous cooling and heating operation is performed. At this time, the liquid refrigerant flowing out of the indoor unit (B) in the heating operation is joined by the diverter (33d) in the liquid line (33), and then flows into the indoor unit (B) in the cooling operation, and evaporates to the low-pressure gas line. Returning to the compressor (1) from (32).

During this simultaneous cooling and heating operation, the two outdoor heat exchangers (2a, 2b) operate as evaporators or condensers according to the indoor load, and one is operated, and the other is operated. Will be stopped.

Further, various sensors are disposed in the refrigerant circuit (3), (Th1) is a liquid temperature sensor for detecting the liquid refrigerant temperature of the indoor unit (B), and (Th2) is a gas refrigerant of the indoor unit (B). A gas temperature sensor that detects the temperature, (Th3) is a room temperature sensor that detects the intake air temperature of the indoor fan (57), and (Th3)
4) is the liquid temperature sensor that detects the liquid refrigerant temperature on the outdoor heat exchanger (2a, 2b) side, and (Th5) is the gas temperature that detects the discharge gas refrigerant temperature on the outdoor heat exchanger (2a, 2b) side Sensor, (Th6) is an outside air temperature sensor which is an outside air temperature detecting means for detecting an outside air temperature, (Th7) is a discharge gas temperature sensor for detecting a discharge gas refrigerant temperature of the compressor (1), and (HPS) is a compressor ( The high pressure sensor detects the pressure of the discharged gas refrigerant of 1), and the low pressure sensor LPS detects the pressure of the suction gas refrigerant of the compressor (1).

Next, FIG. 3 is a system configuration diagram showing a control system of the air conditioner (X), and an outdoor control unit for controlling the outdoor unit (A) by controlling the capacity of the compressor (1) and the like. (6), a branch control unit (7, 7,...) For controlling the branch units (56, 56,...) By opening and closing the open / close valves (52, 53), and the indoor electric expansion valve (51) Are connected via signal lines (10) to indoor control units (8, 8,...) For controlling the indoor units (B, B,. The branch control unit (7) forms an external control unit including the outdoor control unit (6).

Each of the control units (6, 7, 8) has three levels (C1,
C2, C3), the outdoor control unit (6) in the first stage (C1), and the branch control unit (7, 7,
…) Has five indoor control units (8, 8) on the third level (C3).
8, ...).

Further, the indoor control units (8, 8,
…) Is divided into three sections (D1, D2, D3) and the indoor units (B, B,
…) Corresponding to the first and second sections (D1, D2)
, One indoor control unit (8, 8) and three indoor control units (8, 8,...) Belong to the third section (D3).

Further, the branch control unit (7, 7,
…) To the outdoor control unit (6), the indoor control units (8,,) of each section (D1, D2, ...) in the third level (C3).
8) are connected to the respective branch control units (7). Further, independent transmission circuits (E, E,...) Are formed between the respective control units (6 to 8) connected between the respective layers (C1) to (C3).

In each of the transmission circuits (E, E,...), An outdoor control unit (6) is provided between the first level (C1) and the second level (C2).
In the next station, the branch control unit (7,7) is set as the secondary station, and between the second layer (C2) and the third layer (C3), the branch control unit (7,7,7) becomes the primary station. In the station, the indoor control unit (8,8, ...) is set in the secondary station, and each transmission circuit (E, E, ...)
A control signal is transmitted and received every time, and the branch control unit (7) is configured to perform data transfer between the outdoor control and the indoor control units (6, 8).

Each of the indoor control units (8, 8,...) Is configured as a terminal, and a remote controller (9, 9,...) Is connected. The remote control (9,9, ...) is connected to the indoor control unit (8,
8,...) Are divided into three groups (in FIG. 3, two groups and one group each), and are configured to perform group control, and input operation signals such as operation signals. I have.

Further, the branch control unit (7) is configured so that a cooling / heating switching remote control (71) can be connected thereto, while the remote control (9) is connected to a cooling / heating selection display section (91) indicating whether or not a mode setting is possible. Operation switching button for setting the mode (92)
The indoor unit (B, B, B, B, B, B, B, B) is operated by the cooling / heating switching remote control (71) or the operation switching button (91).
..) Are switched between a cooling mode, a heating mode, and a blowing mode.

As shown in FIG. 4, between the branch control unit (7), the indoor control unit (8), and the remote controller (9), each control code defined by the control code means (11) is used. Each of the indoor control units (8, 8,...) Is configured to exchange codes AF.
A control code for specifying a control mode for setting the operation mode of the indoor unit (B, B,...) According to F is determined.

Therefore, the contents of the codes A to F will be described.

First, the first code A is an external code,
The indoor control unit (8) that has received the code A (bit: 000) sets the indoor unit (B) to one of the cooling mode, the heating mode, or the ventilation mode according to the command signal of the branch control unit (7). However, the ventilation can be set by the remote controller (9).

The second code B (bit: 001) is a sub remote control mode in which the indoor control unit (8) that has received the second code B sets the indoor unit (B) in the cooling mode according to a command signal of the remote control (9). The heating mode, the air blowing mode, or the automatic mode is set. The second code B is an indoor control unit (8) other than an indoor control unit (8) that outputs a third code C, which will be described later. For example, as shown in FIG. If there is no indoor control unit (8) to which the remote control (9) is connected based on (7), it is output to the indoor control unit (8a) of another section (D2) different from the section (D3), The data is output to one indoor control unit (8a) connected to the # 1 branch control unit (7). The automatic mode is a mode for automatically switching between the cooling mode and the heating mode based on the suction temperature of the indoor unit (B) and the like. The unit (8a) is configured to automatically switch based on a unique suction temperature or the like.

The third code C (bit: 010) is a remote control code, and the indoor control unit (8) having received the third code C sets the indoor unit (B) in the cooling mode and the heating mode according to the command signal of the remote control (9). Mode, the air blowing mode, or the automatic mode, and one of the indoor control units (8, 8,...) Of one group controlled by one remote controller (9), that is, Output to one master unit connected to one branch control unit (7), and the other indoor control units (8, 8,...) Of each group, , The slave unit and the like are configured to receive the first code A and receive a command signal of the operation mode of the master unit from the branch control unit (7).

At this time, the automatic mode is set to the indoor control unit (8) of the master unit.
Switches the cooling mode and the like based on the unique suction temperature and the like, and the indoor control units (8, 8,...) Of the slave units and the like follow. Regarding (8), in the automatic mode, it is configured to independently switch the cooling mode and the like separately from the indoor control unit (8) of the master unit. That is, the second code B and the third code C are output to one of the indoor control units (8, 8,...) Connected to one branch control unit (7). ing.

The fourth code D (bit: 110) is a neutral code, and the specific remote controller (9) that outputs the operation mode command signal is in the state of waiting for the setting of the third code C. It is configured to show the setting status.

The fifth code E (bit: 011) is the same as the third code C except that the third code C does not have the automatic mode, and the sixth code F (bit: 111) is the same as the fifth code E. The setting is awaited and is configured corresponding to the fourth code D.

That is, the codes A to F are transmitted and received by the branch control unit (7), the indoor control unit (8), and the remote control (9), and the operation mode of the indoor unit (B) is changed by the branch control unit (7) or the remote control (9). ). In addition, if two or more indoor control units (8) of the master unit to which the remote control (9) is connected are connected to the branch control unit (7), one remote control (9) and the remote control (9) Transmits the third code C or the fifth code E to one indoor control unit (8) connected thereto, sets the priority condition so that the operation mode can be switched only by the remote controller (9), and sets the fourth condition. Code D
And the sixth code F is transmitted to the remote controller (9) and the indoor control unit (8) so that the priority condition can be moved to another remote controller (9).

Further, the operation switching button (92) of the remote controller (9) switches the operation mode, and the operation switching button (92) of the remote controller (9) in which the priority condition is set is pressed for a predetermined time.
For example, pressing and holding for 4 seconds cancels the priority condition and
Priority condition is not set (fourth and sixth codes D, F) in which priority conditions can be set to any of the remote controllers (9, 9,...) Linked to the two branch control units (7). The cooling / heating selection display section (91) flickers in the unset state. Then, when the operation switching button (92) of one remote control (9) is pressed while the cooling / heating selection display section (91) is flickering, the remote control (9) sets the priority condition and switches the operation mode. It is configured to be settable.

Each of the branch control units (7, 7,...) Is provided with a jumper (72) as mode setting switching means.
The jumper (72) is configured such that when the jumper (72) is cut, the automatic mode cannot be set in the third code C. In other words, if the cooling / heating mode is automatically switched based on the suction temperature of one indoor unit (B) or the like, the demands of the other indoor units (B) governed by the operation mode are ignored, so that the operation mode is only operated manually. Can be set.

Next, the configuration and operation for setting the operation mode of the indoor unit (B), which is a feature of the present invention, will be described with reference to FIGS.
A description will be given based on the drawings.

First, FIG. 5 shows a control flow of the setting operation of each code A to F in each branch control unit (7), and the code change means (12) is operated by the control flow and the operation switching button (92) of the remote control (9). When the power is turned on, it is determined in step ST1 whether the operation mode setting is to be performed by the cooling / heating switching remote controller (71) or the indoor remote controller (9), and the setting of the branch control unit (7) is performed. Steps when using the cooling / heating switching remote control (71)
Move to ST2.

In step ST2, the data RCDDT of the first code A is transmitted to each indoor control unit (8), and the instruction flag RCCSF is reset. In other words, each code sets the instruction flag RCCSF and sets the indoor control unit (8). ), But the logic of the first code A is set irrespective of the instruction flag RCCSF. In this step ST2, the first code A is transmitted to all the indoor control units (8, 8,...) Connected to the branch control unit (7), and a command signal from the branch control unit (7) is used to transmit the first code A. 8, 8, ...) are set.

On the other hand, when the operation mode is set by the indoor remote controller (9), the process proceeds from step ST2 to step ST3, and it is determined whether or not to set the automatic mode. That is, whether the third code C is set or not. It is determined whether the fifth code E is to be set. If the third code C is to be set, the process proceeds to step ST4. In this step ST4, the fourth code D is transmitted to the all indoor control units (8, 8,...) With the instruction flag RCCSF reset, that is, in the initial stage of installation, the all indoor control units (8, 8,. Since 1 code A is set, the instruction flag RCCSF is reset.

Thereafter, the above-mentioned steps ST4 to ST5, ST6 and ST
The judgment of 7 is performed in order. In step ST5, the unit
In step ST6, it is determined whether or not NO.0 is one unit.
In step ST7, it is determined whether O.0 is 0 or not.
Or multiple devices. In other words, this unit No. 0 is set in the indoor control unit (8) of the master unit to which the remote controller (9) is connected, out of one group controlled by the remote controller (9), and the indoor control unit (8) of the master unit is controlled. 8) in the branch control unit (7) in order.

If the number of indoor control units (8) of the master unit is one, the process proceeds from step ST5 to step ST8,
In ST81, indoor control unit of unit No. 0 (8)
Is set, and the third code C is transmitted, and in step ST82, the first code A is transmitted to the indoor control unit (8) of the slave unit other than the unit No. 0. That is, the operation mode can be automatically set by the remote controller (9) for the indoor control unit (8) of the master unit, and the step ST8 constitutes the specific code means (13).

Also, when there is no indoor control unit (8) of the master unit, that is, when it is controlled by a remote controller (9) linked to another branch control unit (7) (FIG. 3) (8a)
In step ST91, the instruction code RCCSF is set to the indoor control unit (8) of the boring address No. 0 and the second code B is transmitted, while the other indoor control units are set. The first code A is transmitted to (8).

When there are a plurality of indoor control units (8) of the master unit, the process proceeds from step ST7 to step ST10, and in step ST11 of the subroutine in step ST10,
First, it is determined whether or not the indoor control unit (8) of the third code C or the fifth code E exists from the data transmitted from each indoor control unit (8, 8,...) At the beginning of transmission. That is, this step ST10 is a case where the connection is changed, and if the number of the indoor control units (8) for transmitting the third or fifth codes C and E is zero or two or more, the process proceeds to step ST12. In state 2-1 the instruction flag RCCSF is set and the fourth code D is transmitted to the indoor control unit (8) of the master unit of the unit No. 0, while in state 2-2, the indoor control of the slave unit is performed. The first code A is transmitted to the unit (8).

When the remote control (9) on which the priority condition for setting the operation mode is set is specified, that is, when the operation switching button (92) is pressed from the priority condition unset state where the cooling / heating selection button (91) has flickered. Then, the third code C is transmitted from the remote controller (9) to the branch control unit (7) via the indoor control unit (8), and upon receiving the third code C, the process proceeds from step ST12 to step ST13. The instruction flag RCCSF is set and transmitted to the indoor control unit (8), and the routine goes to Step ST14.

In step ST14, in the state 3-2, the third code C is transmitted to the indoor control unit (8) that has transmitted the third code C.
And the support flag RCCSF is reset after confirming that the indoor control unit (8) has reached the third code C. On the other hand, in the state 3-1 other than the indoor control unit (8) that transmitted the third code C First indoor control unit (8)
Send code A. In step ST14, only one remote control (9) for which the priority condition is set is specified, and one indoor control unit (8) for which the operation mode is set by the remote control (9) is specified. , The 1
Upon receiving a command signal from one indoor control unit (8), the branch control unit (7) transmits an operation mode command signal to the other indoor control units (8, 8,...).

If it is determined in step ST11 that the number of the indoor control units (8) transmitting the third or fifth codes C and E is one, the instruction flag RCCSF is set in the indoor control unit (8) in step ST15. After transmission, the above step ST14
The third code C is transferred to the indoor control unit (8).
The first code A is sent to the other indoor control units (8, 8,...).

Then, the operations of steps ST5 to ST7 and step ST10 are repeated.

On the other hand, if it is determined in step ST3 that the automatic mode is not set, the process proceeds to step ST4-1. This step ST4-1 to step ST10-1
Corresponds to steps ST4 to ST10, and the control operation is the same except that a fifth code E is transmitted instead of the third code C and a sixth code F is transmitted instead of the fourth code D. Detailed description is omitted.

In step ST8 and step ST8-1, when the indoor control unit (8) that has transmitted the third or fifth code C, E causes a transmission error, the branch control unit (7) sets the unit number. The next unit No.
The second code B is transmitted to the indoor control unit (8), and the indoor control unit (8) and the remote controller (9) capable of transmission are transmitted.
The operation mode is set between the other indoor control units (8, 8,...) Based on the command signal of the indoor control unit (8).

Also in step ST9 and step ST9-1, when the indoor control unit (8) that has transmitted the second code B (sub remote control code) causes a transmission error, the indoor control unit (8) of the next polling address is sent to the indoor control unit (8). The second code B is transmitted, and the operation mode of the indoor control unit (8) is set by the remote controller (9). When the transmission abnormality is resolved, the state is returned to the original state. Steps ST8 and ST9 and steps ST8-1 and ST9-1 are performed.
Constitutes an abnormal code setting means (14).

Furthermore, in step ST10 and step ST10-1, if a transmission abnormality occurs between the indoor control unit (8) that has transmitted the third or fifth code C and E and the remote controller (9), another remote controller ( In the case where one indoor control unit (8) of the master unit connected to 9) is connected, the third or fifth code C, E is transmitted to the indoor control unit (8), and the indoor control unit (8) of the master unit is transmitted. If 8) are two or more, the fourth or sixth code D, F is transmitted to the indoor control unit (8) of all the master units, and the other remote controller (9) is set in a state where the priority condition is not set, Flick the cooling / heating selection display section (91). And
When the operation switching button (92) of the other remote controller (9) is pressed, priority conditions are set for the remote controller (9), and the operation mode is set by the remote controller (9).

6 and 7 are a control flow chart and a state transition chart showing the setting operation of each code A to F in the indoor control unit (8).
, It is determined whether or not the first code A is received from outside, ie, the branch control unit (7). When the first code A is received, the process proceeds to step ST102 to be in the state of FIG. 7 (a). The first code A is transmitted to the remote controller (9), and the first code A is transmitted to a centralized controller provided in the indoor control unit (8) (not shown). 8) is set to the state of the first code A, and the operation mode is set according to the command signal of the branch control unit (7). Then, step ST103
The instruction flag RCCSF is set and transmitted to the remote controller (9) and the centralized controller, and the process returns.

When the indoor control unit (8) receives another signal from the branch control unit (7), it is determined whether or not the second code B has been received in step ST104. In step ST105, the state shown in FIG. 7 (b) is reached, the first code A is transmitted to the remote controller (9) and the centralized controller, and the own indoor control unit (8) sets the state of the second code B. In the case of the automatic mode, the operation mode such as the cooling mode is set independently. Thereafter, the process returns via the above step ST103.

If no signal has been received from the branch control unit (7), the determination in step ST106 is NO, and
While returning via the above steps ST101, ST104 and step STT106, upon receiving the set instruction flag RCCSF, the following steps ST107 to ST111 are determined,
If it does not correspond to any of the signal contents, the process returns.

Steps STT10 to ST111 are performed by the branch control unit (7).
It is determined whether any of the codes C to F corresponds to the transmission code of the third code C. When the third code C is received, the process proceeds from the step ST107 to the step ST112, and returns through the step ST103. Is received, step DT
It moves from step 108 to step ST113, returns via the above-mentioned step ST103, and returns from step ST109 via the above-mentioned step ST103 when the current own code and the received code match, and 4 code D
Is received, the process proceeds from step ST110 to step ST114, and returns through step ST103. When the sixth code F is received, the process returns from step ST111 to step S114.
The process moves to T115 and returns via the above step ST103.

Therefore, the contents of each of the above steps ST112 to ST115 will be described. First, in step ST112, the state shown in FIG. 7 (c) is reached, and the third code C is transmitted to the remote controller (9) and the centralized controller to control its own indoor control. Unit (8)
Is set to the state of the third code C, and at step ST11
In FIG. 3, the state is as shown in FIG. 7 (c), the fifth code E is transmitted to the remote controller (9) and the centralized controller, and the indoor control unit (8) of itself sets the state of the fifth code E. In any state, the operation mode is set based on the command signal of the remote controller (9).

In step ST114, the state shown in FIG. 7D is reached, and the fourth code D is transmitted to the remote controller (9) and the centralized controller, so that the indoor control unit (8) of the own device is in the fourth state.
Set to the state of code D, and
7 (e), the sixth code E is transmitted to the remote controller (9) and the centralized controller, and the own indoor control unit (8) sets the state of the sixth code E. In any state, the indoor control units (8, 8,...) Are set in a state where the priority condition of the remote controller (9) is not set.

On the other hand, in FIG. 7C, when the instruction flag RCCSF is reset from the state, the state shifts to the state of FIG. 7D, and when the instruction flag RCCSF is reset from the state, FIG. e) and the third or fifth code is sent to the remote controller (9) and the centralized controller, respectively.
After transmitting C and E, its own indoor control unit (8) establishes the state of the third or fifth code C and E, and resets the instruction flag RCCSF output by itself (see block S1).

Then, in the above state of FIG. 7 (d), when the indoor control unit (8) receives the third code C from the remote controller (9) or the centralized controller with the instruction flag RCCSF reset, that is, the remote controller (9) When the operation switching button (92) is pressed while the cooling / heating selection display section (91) is flickering, an instruction flag RCCSF is set up and transmitted to the remote controller (9) and the centralized controller (see block S2), and Then, the indoor control unit (8) enters the state of the third code C. Conversely, in the above state, when the instruction flag RCCSF is reset and the fourth code D is received from the remote controller (9) or the centralized controller, the set instruction flag RCCSF is transmitted, the operation proceeds to the above state, and the instruction flag RCCSF is reset. (See block S1). On the other hand, in the state and the interval in FIG. 7E, the operation is the same as the above-mentioned state and the interval, and the state changes by receiving the fifth code E or the sixth code F.

The indoor control unit (8) changes between a state in which the remote controller (9) having the priority condition for setting the operation mode according to the state, the state, and the state is specified, and a state in which the priority condition is not specified without the specification.

In the above states,,, and
When the temperature control change prohibition flag is set and transmitted from the centralized controller, the state shifts to state,,,, and, without changing its own code C to F, further changing the transmission code to the centralized controller. Instead, the first code A is transmitted to the remote controller (9), and the remote controller (9) turns off the cooling / heating selection display section (91) to inhibit the mode change. When the temperature control change prohibition is released, the state returns to the original state. On the other hand, in the state and the state, when the third code C or the fifth code E is received from the remote controller (9), the state and the state are changed. Also, when the codes C to F are received from the remote controller (9) in the above states, and, the state shifts to the above states, respectively.

Next, FIG. 8 shows each code A to remote control (9).
FIG. 7 is a state transition diagram showing the setting operation of F. The state is an initial state after power is turned on and the respective codes A to F are received. From this initial state, the branch control unit (7) changes to the indoor control unit (8). When each of the codes A to F is received through the first code A, the first code A enters the state, the third code C enters the state, the fourth code D enters the state, the fifth code E enters the state, and the sixth code F enters the state. Respectively. Since the second code B is irrelevant in the remote controller (9), there is no state relating to the code B.

In this state, the mode flag BSF is reset in the state of the first code A, and the cooling / heating selection display section (91)
Is turned off and the operation mode cannot be changed, that is, the priority condition is not set. However, in this state, BS
When the operation switching button (92) is pressed, the operation mode of the indoor unit (B) is changed between cooling and blowing or heating and blowing, and the display is changed in block S11. When other codes C to F are received from the indoor control unit (8) from the above state, the state corresponding to each code C to F,
Move to

Therefore, for example, when the third code C is received, the state shifts to the state via the states, and, and a priority condition for setting the operation mode is provided. The remote controller (9) sets the operation mode with the operation switching button (92). That is, when the operation switching button (92) is pressed once, the display changes in block S12, the state shifts to the state, the timer is set for 4 seconds, and the operation switching button (9
When 2) is turned off, the state shifts to the state, the timer is set for 2 seconds, and when the timer expires, the state returns to the state,
The state of the third code C is maintained. In the above state, if the operation switch button (92) is pressed again within 2 seconds, the state changes and the display changes sequentially, while the state changes to the state and the mode flag BSF is set from the set state. The mode switches according to the display.

On the other hand, if the operation switching button (92) is continuously pressed for 4 seconds or more in the above state, the state shifts to the state of the fourth code D, a priority condition release signal is output, and the priority condition is not set. , And all the remote controllers (9, 9,...) Linked to one branch control unit (7) are in a state where the priority condition is not set. When the priority condition is not set, the cooling / heating selection display section (91) flickers. When the operation switching button (92) of one of the remote controllers (9) is pressed in this state, the remote controller (9) is in the state. And the other remote controller (9) shifts to the state. Thereby, the remote controller (9) for setting the operation mode changes.

In addition, from state to state, the mode flag BSF
Remains set, the operation mode does not change, and the display returns to its original state.

Also, between the states, the fifth code E and the sixth code F are changed in the same manner as in the above states, and the display and the operation mode are changed in the state and the block S13. Will be

As described above, the codes A to F are transmitted and received between the branch control unit (7), the indoor control unit (8), and the remote controller (9), and the operation mode is set.

Therefore, since the first code A controlled by the branch control unit (7) and the third code C controlled by the specific remote controller (9) are provided to determine the setting mode of the operation mode, the specific mode is set. Since the mode can be changed by the remote controller (9), the operability can be improved. Also, since the mode can be changed only by the specific remote controller (9) and the specific remote controller (9) can be changed, the driving mode can be reliably specified, and the comfort can be improved. It is possible to cope with a change in partition, and it is possible to improve operability.

In the case of one remote controller (9), the mode can be automatically changed by the remote controller (9), so that the operability can be further improved.

In addition, since the setting of the automatic mode can be made unnecessary by the jumper (72), the operation mode according to the request of the indoor unit (B) can be accurately set.

In addition, since the operation mode can be changed even when transmission is abnormal, an accurate operation mode can be set.

In this embodiment, the branch unit (56) and the branch control unit (7) are provided. However, in the present invention, the indoor unit (B) is connected to the outdoor unit (A), and the indoor control unit (8) is connected. It may be connected to the outdoor control unit (6).

Further, the connection mode of the remote controller (9) is not limited to the embodiment. For example, the remote controllers (9, 9,...) May be provided in all the indoor control units (8, 8,...).

[Brief description of the drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 8 show an embodiment of the present invention, FIG. 2 is a refrigerant circuit diagram of the air conditioner, and FIG. 3 is a system configuration diagram of the control system. FIG. 4 is a diagram showing the contents of control code means, and FIG.
Fig. 6 is a control flow diagram of the branch control unit, Fig. 6 is a control flow diagram of the indoor control unit, Figs. 7 (a, b, c, d) and (e) are the same state transition diagrams, and Fig. 8 is a remote control unit. It is a state transition diagram. (3) ... refrigerant circuit, (6) ... outdoor control unit,
(7) Branch control unit (8) Indoor control unit (9) Remote control (11) Control code means (12) Code changing means (13) Specific code Means (14)… Abnormal code setting means, (72)… Jumper.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Kamabo, 1304 Kanaokacho, Sakai-shi, Osaka Daikin Industries, Ltd. Sakai Factory Kanaoka Plant (56) References JP-A-63-247566 (JP, A) JP-A-64-88055 (JP, A)

Claims (4)

(57) [Claims] An outdoor unit (A) and a plurality of indoor units (B, B, ...) connected in parallel to the outdoor unit (A), wherein the indoor unit (B) is in a cooling operation state or A plurality of indoor control units (8, 8,...) For controlling the indoor units (B, B,...), Respectively; An external control unit (7) for controlling the unit (A) and transmitting and receiving a control signal to and from the indoor control unit (8); and transmitting and receiving a control signal to and from the indoor control unit (8). An operation control device for an air conditioner comprising one or more remote controls (9) for operating the unit (B), wherein the remote control (9), the indoor control unit (8, 8,...) Control code exchanged with the control unit (7) There is provided control code means (11) for defining a control code for the indoor control unit (8) to specify a control mode for setting the operation mode of the indoor unit (B), wherein the control code means (11) is provided. Is the external control unit (7)
An external code for changing the operation mode of the indoor unit (B) according to the command signal output by the remote controller, and a specific remote controller (9)
Is a control code for setting the operation mode of the indoor unit (B) in accordance with the command signal output by the remote control code set for the specific indoor control unit (8), and a state where the external code and the remote control code are not set. And a code changing means (12) for changing each code of the control code means (11) is provided while at least a neutral code indicating a settable state of the remote control code is provided. Operation control device for the air conditioner to be installed. 2. The operation control device for an air conditioner according to claim 1, wherein only one remote controller (9) is provided, and the remote controller (9) and the remote controller (9) are connected to one room. An operation control device for an air conditioner, comprising a specific code means (13) for setting a remote control code for the control unit (8). 3. The operation control device for an air conditioner according to claim 1, wherein an automatic mode in which the indoor control unit automatically switches between the cooling mode and the heating mode is set to the operation mode of the remote control code. An operation control device for an air conditioner, comprising a mode setting switching means (72). 4. The operation control device for an air conditioner according to claim 1, wherein the control code means (11) includes an indoor unit according to a command signal output from a specific remote controller (9) for setting an operation mode. A control code for setting the operation mode of the unit (B) to one of the cooling mode, the heating mode, and the automatic mode. When the automatic mode is set, the indoor control unit (8) independently performs the cooling mode and the heating mode. When a specific indoor control unit (8) in which the remote control code is set causes a transmission error while a sub remote control code for switching the mode is added, the specific remote control code is replaced with the specific indoor control unit (8). In order to enable the operation mode of the indoor unit (B) to be set in accordance with the command signal of (9), a remote controller (9) is connected and another indoor room in which an external code is set. An operation control device for an air conditioner, comprising: an abnormality code setting means (14) for setting a sub remote control code for the control unit (8).