air conditioning system

Abstract

Air conditioning system that features: an outdoor unit (100) comprising an external control device (160); several indoor units (200, 200A, 200B, 200C), each comprising an indoor control device (230) configured to control devices contained in each indoor unit (200, 200A, 200B, 200C) according to an instruction; several communication lines (500, 500A, 500B, 500C), each connecting the outdoor unit (100) and one of the several indoor units (200, 200A, 200B, 200C) so that the outdoor unit (100) and the associated indoor unit (200, 200A, 200B, 200C) can communicate with each other; and a remote control unit (300) comprising a remote control control device (310) and configured to communicate wirelessly with each of the indoor units (200, 200A, 200B, 200C), wherein each of the indoor units (200, 200A, 200B, 200C) comprises an indoor-side adjustment device (270) configured to determine an identification number that identifies the indoor unit (200, 200A, 200B, 200C), wherein the indoor-side control device (230), upon receiving a signal containing the instruction sent by the remote control unit (300), determines whether the devices are to be controlled or not based on a set identification signal, and transmits the signal containing the instruction to the outdoor unit (100) via an associated communication line (500, 500A, 500B, 500C), and wherein the outdoor control device (160), based on the identification signal contained in the signal transmitted via the associated communication line (500, 500A, 500B, 500C) was sent, determines which of the indoor units (200, 200A, 200B, 200C) is a unit to be assigned,where the indoor unit (200, 200A, 200B, 200C) is to receive an instruction, and sends the signal containing the instruction to the indoor unit (200, 200A, 200B, 200C) that is the unit to be instructed via an associated communication line (500, 500A, 500B, 500C), if the outdoor control device (160) determines that the indoor unit (200, 200A, 200B, 200C) that has the indoor control device (230) which sent the signal to the outdoor unit (100) is not the unit to be instructed.

Description

Technical field

[0001] The present disclosure relates to an air conditioning system and, in particular, to the control of multiple indoor units. State of the art

[0002] Recently, variable refrigerant systems, known as residential air conditioners, have also been used in ordinary households. These systems consist of an outdoor unit and several indoor units connected by piping to form a refrigerant circuit for air conditioning. Because a single outdoor unit serves multiple indoor units, the space required for installing the outdoor unit on a property with a house can be reduced. It is assumed that the multiple indoor units are installed in their respective rooms.

[0003] In the residential air conditioners described above, instructions are generally sent to the indoor units in the respective rooms using remote control units located in those rooms, allowing for remote operation. For example, a signal containing an instruction is sent from remote control unit A in room A to an indoor unit A located in room A. In many residential air conditioners, the remote control unit is a wireless unit that communicates via radio waves.

[0004] To allow a person in one room to remotely control an indoor unit located in another room, a remote control system is often used in addition to a communication system between the outdoor unit and the indoor units. This system includes a dedicated central remote control unit (see, for example, JP 2001-324192A). Furthermore, to communicate using the aforementioned remote control system, the central remote control unit must be connected to either the indoor units or the outdoor unit. This connection necessitates the establishment of new communication lines between the indoor units and the outdoor unit.It should be noted that in many cases the central remote control unit of the remote control system is connected to the indoor units or the outdoor unit via communication lines.

[0005] JP H05-187697A discloses a remotely controllable air conditioning system with two indoor units connected to each other for the transmission of a remote control signal.

[0006] JP H08-200 778 A discloses a remotely controllable air conditioning system with multiple indoor units, each connected to a common outdoor unit to transmit a remote control signal, which does not affect an indoor unit receiving the remote control signal. List of citations from patent literature Patent document 1: JP 2001 - 324 192 A Patent Document 2: JP H05-187 697 A Patent document 3: JP H08-200 778 A Summary of the present disclosure; Technical problem statement

[0007] In order for an indoor unit in one room, such as in the remote control control system of patent document 1, to be operated using a remote control unit in another room, a communication system must be used that differs from a commonly used communication system for communication between indoor units and an outdoor unit. Setting up such a communication system also requires adjusting equipment and making wiring connections.

[0008] The present disclosure serves to solve the above-mentioned problem and relates to an air conditioning system which enables a person who is in one room to operate an indoor unit installed in another room without the need to adjust any devices or make any wiring connections. Solution to the problem

[0009] To solve the above problems, an air conditioning system is proposed that has the features specified in independent claim 1. Advantageous embodiments of the air conditioning system are described by dependent claims 2 to 6. According to one particular embodiment, the air conditioning system comprises: an outdoor unit comprising an outdoor control device; several indoor units, each comprising an indoor control device configured to control a device contained in each indoor unit in response to a command; several communication lines, each connecting the outdoor unit and an associated one of the several indoor units so that the outdoor unit and the associated indoor unit can communicate with each other; and a remote control unit comprising a remote control device configured to communicate wirelessly with each of the indoor units.Each indoor unit includes an indoor control device configured to determine an identification number that identifies the indoor unit. Upon receiving a signal containing an instruction sent by the remote control unit, the indoor control device determines whether or not the unit should be controlled based on a specified identification signal and transmits the instruction signal to the outdoor unit via an associated communication line.The external control device determines, based on the identification signal contained in the signal transmitted via the associated communication line, which of the indoor units is the unit to be instructed, and sends the signal containing the instruction via an associated communication line to the indoor unit that is the unit to be instructed. Beneficial effects of the present disclosure

[0010] In an air conditioning system according to an embodiment of the present disclosure, identification numbers are assigned to the respective indoor units. Furthermore, a command signal to be transmitted contains the identification number of an indoor unit that is to receive a command. Based on the identification number contained in the transmitted signal, the signal containing the command can then be sent from one of the indoor units to another of the indoor units identified by the identification number, via the communication lines and the outdoor unit. Brief description of the drawings Fig. Figure 1 shows a representation illustrating the configuration of an air conditioning system according to embodiment 1 of the present disclosure. Fig. Figure 2 shows a representation illustrating the configuration of an outdoor unit according to embodiment 1 of the present disclosure. Fig. Figure 3 shows a representation illustrating the configuration of an indoor unit according to embodiment 1 of the present disclosure. Fig. Figure 4 shows a representation illustrating the configuration of a remote control unit according to embodiment 1 of the present disclosure. Fig. Figure 5 shows a representation illustrating the processing sequence of an air conditioning system according to embodiment 1 of the present disclosure. Fig. Figure 6 shows a representation illustrating a screen display on the remote control unit according to embodiment 2 of the present disclosure. Description of embodiments

[0011] An air conditioning system according to an embodiment of the present disclosure is described with reference to the figures. In each of the aforementioned figures, components that are the same or equivalent to those in a preceding figure are designated with the same reference numerals, and this also applies to the following description of the embodiments. Furthermore, the relative sizes of the respective components in the figures may differ from the actual sizes. The configurations of the components are described throughout the description by way of example and are not limited to the configurations described therein. In particular, a case in which components are combined is not limited to combining components according to the same embodiment. A component in one embodiment may, if necessary, be applied to another embodiment. Furthermore, the values ​​of temperature, pressure, etc., are not specified.They are not determined in terms of absolute values; that is, they are determined relatively, for example, depending on the status and operation of the system or plant. Furthermore, in the case of several devices of the same type that are distinguished from one another by suffixes, the suffixes may be omitted if they do not need to be specifically identified or differentiated. Design 1

[0012] Fig. Figure 1 shows a diagram illustrating the configuration of an air conditioning system according to embodiment 1 of the present disclosure. The description is given primarily with reference to configurations relating to the communication and control system of the air conditioning system. The air conditioning system described below is an example, and an air conditioning system according to the present disclosure is not limited to the one described in Figure 1. Fig. The system shown is limited.

[0013] The air conditioning system according to embodiment 1 is a so-called residential air conditioner in which several indoor units 200 and one outdoor unit 100 are connected via pipes 400 to form a refrigerant circuit for air conditioning a house. More precisely, in the air conditioning system according to embodiment 1, which is in Fig. Figure 1 shows a single outdoor unit 100 and three indoor units 200A, 200B, and 200C connected via pipes 400. It is assumed that the pipes between the indoor units 200 and the outdoor unit 100 are installed independently. The indoor units 200 are located at appropriate points in the house. In the air conditioning system according to embodiment 1, it is assumed that the indoor units 200A to 200C are installed in their respective rooms.

[0014] As in Fig. As shown in Figure 1, the indoor units 200 of the air conditioning system according to embodiment 1 are connected to the outdoor unit 100 via respective communication lines 500. In this way, the indoor units 200 and the outdoor unit 100 can communicate with each other using signals containing various data. Specifically, the outdoor unit 100 and the indoor unit 200A are connected to each other via a communication line 500A; likewise, the outdoor unit 100 and the indoor unit 200B are connected to each other via a communication line 500B; and in the same way, the outdoor unit 100 and the indoor unit 200C are connected to each other via a communication line 500C. Furthermore, a remote control unit 300 is provided, which can communicate wirelessly with each of the indoor units 200.

[0015] Fig. Figure 2 shows a diagram illustrating the configuration of an outdoor unit 100 according to embodiment 1 of the present disclosure. The outdoor unit 100 comprises, as devices for system operation related to air conditioning, a compressor 110, an outdoor heat exchanger 120, a switching device 130, expansion devices 140, and an outdoor fan 150. Furthermore, the outdoor unit 100 comprises, as communication and control system devices, an outdoor control device 160, an outdoor communication device 170, and an outdoor storage device 180. It is assumed that the outdoor control device 160, the outdoor communication device 170, and the outdoor storage device 180 are separate devices; however, the devices can also be provided, for example, in the form of a single control unit located on a circuit board.

[0016] The compressor 110 compresses the drawn-in refrigerant and discharges the compressed refrigerant at a pressure based on a drive frequency. The external heat exchanger 120 facilitates heat exchange between the outside air and the refrigerant flowing through it. The external fan 150 supplies outside air to the external heat exchanger 120. The switching device 130 is, for example, a four-way valve that switches the refrigerant flow path between the heating and cooling modes. The expansion devices 140 are provided together with the respective indoor units 200. More specifically, the outdoor unit 100 according to embodiment 1 comprises, as shown in Fig. Figure 2 shows three expansion devices 140A, 140B and 140C, which are provided together with the respective indoor units 200. The expansion devices 140 each comprise a valve, the degree of opening of which is adjusted in response to a command from the outdoor control device 160 in order to adjust the flow rate and pressure of the refrigerant flowing to an associated indoor unit 200.

[0017] The external control device 160 of embodiment 1 controls devices contained in the outdoor unit 100 and performs other operations. In particular, the external control device 160 performs processing related to sending and receiving signals concerning instructions that are executed between the respective indoor units 200. The external control device 160 comprises a control processing unit 161 and an instruction processing unit 162. The control processing unit 161 performs processing to control the operations of the devices contained in the outdoor unit 100 based on a signal sent by a sensing device (not shown) located in the outdoor unit 100, on the basis of signals sent by the indoor units 200, and on the basis of other signals.The instruction processing unit 162 performs processing to process signals sent by the indoor units 200 and, if it is determined that the signal sent by one of the indoor units 200 is a signal containing an instruction to another of the indoor units 200, sends the instruction to the aforementioned other indoor unit 200.

[0018] The external communication device 170 is connected to the communication lines 500 and serves as an interface for signal communication between the communication lines 500 and the external control device 160 for sending and receiving various types of signals. Furthermore, the external storage device 180 temporarily or permanently stores data required by the external control device 160 for processing. In particular, the external storage device 180 stores data specifying identification numbers assigned to the respective indoor units 200.

[0019] The external control device 160, for example, is a device that performs control computing processing, such as a computer that uses a central processing unit (CPU) as its main component. The external control device 160 executes a program that was previously created for a processing procedure of each of the units in order to perform the processing for each unit. The external storage device 180, for example, stores data related to the program. However, the execution of the processing is not limited to simply executing the program. Each of the units can be configured as a dedicated device that performs the associated processing.Furthermore, the external storage device 180 includes a volatile storage device (not shown), such as random access memory (RAM), which can temporarily store data, and a non-volatile auxiliary storage device (not shown), such as a hard disk or flash memory, which can store data long-term.

[0020] Fig. Figure 3 shows a diagram illustrating the configuration of each of the indoor units 200 according to embodiment 1 of the present disclosure. The indoor units 200 comprise, as devices for system operation related to air conditioning, an indoor heat exchanger 210 and an indoor fan 220. Furthermore, the indoor units 200 comprise, as communication and control system devices, an indoor control device 230, an indoor communication device 240, an indoor storage device 250, an indoor notification device 260, and an indoor adjustment device 270.It is assumed that the interior control device 230, the interior communication device 240, the interior storage device 250, the interior notification device 260, and the interior adjustment device 270 are separate devices. However, these devices can also be configured, for example, as a single control unit.

[0021] The interior heat exchanger 210 facilitates heat exchange between the refrigerant flowing through it and the room air of the associated room. The interior fan 220 directs the room air so that it flows through the interior heat exchanger 210 and then back into the room.

[0022] The indoor control device 230, for example, controls the devices contained in the indoor unit 200. Furthermore, the indoor unit 200 performs processing related to its operation in response to an instruction contained in a signal sent by the outdoor unit 100 via the associated communication line 500, in addition to an instruction contained in a signal sent by the remote control unit 300. It should be noted that the indoor control device 230 of embodiment 1 makes a determination based on the transmitted signal.If it is determined that the instruction is not an instruction to an indoor unit 200 containing this indoor control device, the indoor control device 230 sends the signal containing the instruction to the outdoor unit 100 and does not control the devices based on the instruction.

[0023] The indoor communication device 240 comprises a wired communication device 241 and a wireless communication device 242. The wired communication device 241 is connected to each of the communication lines 500 and serves as an interface for signal communication between the communication line 500 and the indoor control device 230, in order to transmit and receive various types of signals to and from the outdoor control device 160. The wireless communication device 242 serves as an interface for signal communication between the indoor control device 230 and the remote control unit 300, in order to send and receive various types of signals to and from the remote control unit 300.

[0024] Furthermore, the internal storage device 250, like the external storage device 180, comprises a volatile storage device (not shown) and a non-volatile auxiliary storage device (not shown). The internal control device 230 temporarily or permanently stores data that is necessary for the internal control device 230 to perform processing. The internal storage device 250 according to embodiment 1 stores data, in particular data that specifies defined identification numbers.

[0025] The indoor notification device 260, based on a notification signal sent by the indoor control device 230, issues a message in the room indicating that an operation has been performed. The content of the message and the manner in which it is issued are not specifically restricted. The indoor notification device 260 can issue a visual message, such as a display using an image or characters, a light indicator, a message using speech or buzzing, and other types of messages. Additionally, the indoor setting device 270 is a device configured to determine an identification number for the indoor unit 200. While the indoor setting device 270 is not specifically restricted, it is configured, for example, by shorting jumpers or a DIP switch.It is assumed that in the air conditioning system according to embodiment 1, the above setting is made such that the indoor unit 200A is assigned the identification number “1”, the indoor unit 200B the identification number “2” and the indoor unit 200C the identification number “3”.

[0026] Fig. Figure 4 shows a diagram illustrating the configuration of a remote control unit 300 according to embodiment 1 of the present disclosure. A remote control unit 300 according to embodiment 1 comprises a remote control control device 310, an instruction input device 320, a remote control communication device 330, a remote control display device 340, and a remote control selection device 350. The instruction input device 320 comprises buttons and other components. For example, an instruction to start or stop a process, or an instruction regarding a temperature or an air volume, is entered into the instruction input device 320. The entered instruction is sent to the remote control control device 310. The remote control communication device 330 transmits a signal associated with the instruction sent by the remote control control device 310.The remote control communication device 330 according to embodiment 1 transmits the signal using infrared light; however, this is not to be understood as a limitation.

[0027] The remote control display device 340 displays a set temperature, airflow setting, or other settings based on a display signal sent by the remote control control device 310. The remote control selection device 350 is a device that selects and specifies an indoor unit 200 as the unit to which a command is to be issued. The remote control selection device 350 according to embodiment 1 includes a selector switch. A user operates the selector switch to select and specify one of the indoor units 200 as the unit to be specified. The selector switch enables the user to easily select and set an indoor unit.

[0028] The remote control control device 310 controls the entire remote control unit 300. In particular, according to embodiment 1, an identification number selected by the remote control selection device 350 is appended to an instruction entered at the instruction input device 320, and the instruction is then sent to the remote control communication device 330. Embodiment 1 is described assuming that the remote control unit 300 includes the remote control control device 310. However, this is not to be understood as a limitation. The instruction input device 320, the remote control communication device 330, the remote control display device 340, and the remote control selection device 350 can also access the functions performed by the remote control control device 310.

[0029] In an air conditioning system, for which a residential air conditioner is an example, an instruction was previously used from a remote control unit for an indoor control device of an indoor unit. This indoor unit received the instruction to perform processing and an operation based on the instruction designated as an instruction to the indoor unit containing the indoor control device itself, and to execute the operation. In the air conditioning system according to embodiment 1, data specifying the identification number of an indoor unit 200, which is the unit to be instructed, is appended to a signal relating to an instruction sent by the remote control unit 300. Then, an indoor unit 200, having received the signal, transmits the signal to the outdoor unit 100 via the communication line 500.The outdoor unit 100 sends the signal via communication line 500 to the indoor unit 200, which is the unit to be instructed. The indoor unit 200 processes the instruction and operates based on it. Since the data specifying the identification number of the indoor unit 200 is added to the instruction signal, the instruction can be sent from the remote control unit 300 to the indoor unit 200, which is the unit to be instructed, via the indoor unit 200 and the outdoor unit 100, both of which have received the signal.

[0030] Fig. Figure 5 shows a diagram illustrating the processing sequence of the air conditioning system according to embodiment 1 of the present disclosure. The processing is described by way of example in the case where the user, using the remote control unit 300 of the indoor unit 200C, issues an instruction via the indoor unit 200A as a remote control operation. The user selects and determines the identification number assigned to the indoor unit 200C using the remote control selection device 350 and enters an instruction using the instruction input device 320 (step S1). The remote control control device 310 adds the identification number to the entered instruction and sends the instruction to the remote control communication device 330 (step S2). The remote control communication device 330 sends a signal containing the instruction to the indoor unit 200A (step S3).

[0031] The processing at the indoor unit 200A is performed by the indoor control device 230A. Upon receiving the signal from the remote control unit 300 via the wireless communication device 242, the indoor control device 230A uses the signal's identification number to determine whether the instruction is directed to an indoor unit 200 containing the indoor control device 230A itself (step S11). If it is determined that the instruction is directed to the indoor unit 200 containing the indoor control device 230A itself, the indoor control device 230A causes the refrigerant circuit system devices to operate according to the instruction (step S12).Furthermore, the indoor control device 230A transmits the received signal to the outdoor unit 100 via the wired communication device 241 (step S13). Additionally, the indoor control device 230A controls, for example, with regard to airflow velocity, airflow direction, and other setting options, the devices in the refrigerant circuit system of the indoor unit 200 to activate them. It should be noted that the data on airflow velocity, airflow direction, and other setting options of each of the indoor units 200 are used by the outdoor unit 100 as data for controlling the refrigerant circuit. Therefore, the indoor control device 230A also sends the signal to the outdoor unit 100, even though the instruction is for the devices to control the processes.

[0032] If, on the other hand, it is determined in step S11 that the instruction is for a different indoor unit 200, the indoor control device 230A sends the received signal to the outdoor unit 100 via the wired communication device 241 (step S13). Since the air conditioning system according to embodiment 1 is a residential air conditioner, the communication lines 500 often do not connect the indoor units 200 directly. Therefore, in the air conditioning system, the instruction is sent via the outdoor unit 100 to the indoor unit 200, which is the unit to be instructed.

[0033] The processing in the outdoor unit 100 is carried out by the outdoor control device 160, primarily by the instruction processing unit 162. Upon receiving the signal from the indoor unit 200 via the outdoor communication device 170, the outdoor control device 160 determines, based on an identification signal contained in the signal, which of the indoor units 200 is the unit to be instructed (step S21). The outdoor control device 160 then sends the signal relating to the instruction via the outdoor communication device 170 and the communication line 500 to the indoor unit 200 designated as the unit to be instructed (step S22). It should be noted that the outdoor control device 160 does not send the signal if it is determined that the indoor unit 200 designated as the unit to be instructed is the indoor unit 200A that sent the signal.

[0034] The interior control device 230C of the interior unit 200C, which is the designated interior unit 200, controls devices based on the instruction sent via the communication line 500 and the wired communication device 241 (step S31). At this point, the interior control device 230C transmits a notification signal to the interior notification device 260 to cause the interior notification device 260 to issue a notification that the operation is to be carried out (step S32).

[0035] As described above, in the air conditioning system according to embodiment 1, the remote control unit 300 includes the remote control selection device 350 and can select and designate an indoor unit 200 as the unit to be instructed. The data about the identification number of the indoor unit 200, which is the unit to be instructed, is then appended to the signal containing the instruction. Communication between the remote control unit 300, the indoor unit 200, and the outdoor unit 100 can take place via the communication lines 500. This allows a signal containing an instruction to be sent from one of the indoor units 200, and the instruction can be transmitted to the indoor unit 200, which is the unit to be instructed, without adding any new hardware, such as a communication device (e.g., a central remote control unit), and without any additional wiring.For example, an instruction issued in a specific room via the remote control unit 300 as an instruction regarding the operation of an indoor unit 200 mounted in another room can be given via the indoor unit 200 installed in the specific room, the outdoor unit 100 and the communication line 500.

[0036] If the number of indoor units 200 is two, even if no identification numbers have been assigned to the indoor units 200, it is sufficient, for example, for each of the indoor units 200 to determine whether the instruction is directed to the indoor unit 200 itself or not. Thus, it is possible to easily determine which of the indoor units 200 is the target of the instruction. Therefore, the system according to embodiment 1 is particularly effective for an air conditioning system with three or more indoor units. Design 2

[0037] Fig. Figure 6 shows a diagram illustrating a screen display on a remote control unit 300 according to embodiment 2 of the present disclosure. In the air conditioning system according to embodiment 2, a remote control display device 340 of the remote control unit 300, if the remote control unit 300 can receive a signal from an indoor unit 200, displays the status of another indoor unit 200 or the status of other indoor units 200. The air conditioning system of embodiment 2 is described assuming that it has the same configuration as the one described in Fig. 1 has the system shown, which was described above in relation to embodiment 1.

[0038] On the in Fig. The screen display shown in section 6 indicates whether the three indoor units 200 are in cooling or heating mode, and displays the setpoint temperatures configured on the indoor units 200. As shown in Fig.As shown in Figure 6, the largest display area on the screen is for the indoor unit 200A with the identification number "1". This area shows not only whether the indoor unit 200A is in cooling or heating mode and what temperature is set for the indoor unit 200A, but also the airflow direction, airflow speed, and other settings. Generally, a larger area of ​​the screen on the remote control unit displays the status of an indoor unit 200A with which the remote control unit communicates directly and which is located in the same room. However, the status of a different indoor unit can also be displayed if the indoor unit shown in the larger area of ​​the screen is changed to the aforementioned other indoor unit using the instruction input device 320.

[0039] As described above, according to the air conditioning system of embodiment 2, bidirectional communication can be carried out between each of the indoor units 200 and the remote control unit 300. Thus, an indoor unit 200 can transmit a signal containing data about the status of the other indoor unit(s) 200 to the remote control unit 300, and the status can be displayed on the remote control display device 340 of the remote control unit 300. Therefore, the user can easily ascertain the status of a room in which the other indoor unit 200 is installed and issue a command by operating the remote control unit 300. embodiment 3

[0040] With regard to embodiment 1, it was described above that the remote control selection device 350 of the remote control unit 300 includes a selector switch; however, this is not to be understood as a limitation. For example, the remote control control device 310 can also serve as the remote control selection device 350. Furthermore, the remote control control device 310 can also perform processing to select and specify an indoor unit 200 as the unit to be instructed, based on an instruction entered by the user into the instruction input device 320, and to perform processing to store information indicating which of the indoor units 200 is the unit to be instructed in the memory device contained in the remote control control device 310. Reference symbol list 100 outdoor units 110 Compressor 120 external heat exchanger 130 switching device 140, 140A, 140B, 140C expansion device 150 external fans 160 external control device 161 Control processing unit 162 Instruction processing unit 170 external communication device 180 external storage device 200, 200A, 200B, 200C Indoor unit 210 interior heat exchanger 220 interior fan 230 interior control device 240 interior communication device 241 wired communication device 242 wireless communication device 250 interior storage device 260 interior notification device 270 interior-side adjustment device 300 remote control units 310 Remote control device 320 Instruction input device 330 Remote control communication device 340 Remote control display device 350 remote control selection device 500, 500A, 500B, 500C Communication line

Claims

[1] Air conditioning system which features: an outdoor unit (100) comprising an external control device (160); several indoor units (200, 200A, 200B, 200C), each comprising an indoor control device (230) configured to control devices contained in each indoor unit (200, 200A, 200B, 200C) according to an instruction; several communication lines (500, 500A, 500B, 500C), each connecting the outdoor unit (100) and one of the several indoor units (200, 200A, 200B, 200C) so that the outdoor unit (100) and the associated indoor unit (200, 200A, 200B, 200C) can communicate with each other; and a remote control unit (300) comprising a remote control control device (310) and configured to communicate wirelessly with each of the indoor units (200, 200A, 200B, 200C), wherein each of the indoor units (200, 200A, 200B, 200C) comprises an indoor-side adjustment device (270) configured to determine an identification number that identifies the indoor unit (200, 200A, 200B, 200C), wherein the indoor-side control device (230), upon receiving a signal containing the instruction sent by the remote control unit (300), determines whether the devices are to be controlled or not based on a set identification signal, and transmits the signal containing the instruction to the outdoor unit (100) via an associated communication line (500, 500A, 500B, 500C), and wherein the outdoor control device (160), based on the identification signal contained in the signal transmitted via the associated communication line (500, 500A, 500B, 500C) was sent, determines which of the indoor units (200, 200A, 200B, 200C) is a unit to be assigned,where the indoor unit (200, 200A, 200B, 200C) is to receive an instruction, and sends the signal containing the instruction to the indoor unit (200, 200A, 200B, 200C) that is the unit to be instructed via an associated communication line (500, 500A, 500B, 500C), if the outdoor control device (160) determines that the indoor unit (200, 200A, 200B, 200C) that has the indoor control device (230) which sent the signal to the outdoor unit (100) is not the unit to be instructed. [2] Air conditioning system according to claim 1, wherein Each of the indoor units (200, 200A, 200B, 200C) comprises a notification device (260) configured to provide a notification based on a notification signal, and The indoor control device (230), when the signal containing the instruction is received from the outdoor unit (100) via the associated communication line (500, 500A, 500B, 500C), sends the notification signal to induce the notification device (260) to carry out the notification. [3] Air conditioning system according to claim 1 or 2, wherein the remote control unit (300) comprises a remote control selection device (350) configured to select and specify one of the indoor units (200, 200A, 200B, 200C) as the unit to be instructed, and the signal containing the instruction sent by the remote control unit (300) includes data specifying the identification number of the indoor unit (200, 200A, 200B, 200C) selected and specified by the remote control selection device (350). [4] Air conditioning system according to claim 3, wherein the remote control selection device (350) is a selector switch. [5] Air conditioning system according to any one of claims 1 to 4, wherein the remote control unit (300) comprises a remote control display device (340), and the remote control control device (310) causes the remote control display device (340) to display the status of the multiple indoor units (200, 200A, 200B, 200C) based on the indoor units (200, 200A, 200B, 200C) to display sent signals. [6] Air conditioning system according to any one of claims 1 to 5, wherein the number of indoor units (200, 200A, 200B, 200C) is three or more and the three or more indoor units (200, 200A, 200B, 200C) are connected to the outdoor unit (100) via the communication lines (500, 500A, 500B, 500C) such that each of the indoor units (200, 200A, 200B, 200C) and the outdoor unit (100) can communicate with each other.

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