JP4107876B2 - Air conditioning system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioning system in which a central monitoring device controls a plurality of outdoor units of an air conditioning device.
[0002]
[Prior art]
As shown in FIGS. 3 and 4, the air conditioning system 100 (FIG. 3) and the air conditioning system 120 (FIG. 4) are configured so that the central monitoring device 101 moves the outdoor unit 102 through the relay board 105 and the relay board 106. The outdoor unit 103 is remotely operated, and the outdoor unit 104 is remotely operated via the relay board 107. The relay boards 105, 106, and 107 change the communication form, and one relay board is installed corresponding to each of the outdoor units 102, 103, and 104.
[0003]
In the air conditioning system 100, the central monitoring device 101 individually controls the outdoor units 102, 103, and 104. The central monitoring device 101 and the outdoor units 102, 103, and 104 are connected to the outdoor units 102, 103, and 104 via communication wires 108, 109, and 110, respectively. Connected.
[0004]
When the central monitoring apparatus 101 is limited to transmitting the same control signal to the outdoor units 102, 103, and 104 in order to collectively control the outdoor units 102, 103, and 104, as in the air conditioning system 100, All of the machines 102, 103 and 104 need not be individually connected to the central monitoring apparatus 101.
[0005]
The air conditioning system 120 eliminates the waste of wiring as described above. The central monitoring device 101 is connected only to the relay board 105 corresponding to the outdoor unit 102 by the communication wiring 111, and the relay boards 105, 106, and 107 are connected. The connecting wires 112 and 113 are connected. The same control signal from the central monitoring apparatus 101 is transmitted to the outdoor unit 102 via the communication wiring 111, to the outdoor unit 103 via the transition wiring 112, and to the outdoor unit 104 via the transition wirings 112 and 113, respectively. The outdoor units 102, 103, and 104 are collectively controlled.
[0006]
[Problems to be solved by the invention]
However, for example, when the number of outdoor units increases, the number of crossover wires 112 and 113 also increases accordingly, and the cost increases.
[0007]
An object of the present invention is made in consideration of the above-described circumstances, and is to provide an air-conditioning system capable of reducing wiring and reducing costs.
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is an air conditioning system in which the central monitoring device can control a plurality of outdoor units of the air conditioner, and is connected to the central monitoring device by parallel communication wiring, and is connected to the plurality of outdoor units. A relay device is connected between the central monitoring device and the plurality of outdoor units, and is connected by serial communication wiring. The relay device has a plurality of input ports corresponding to the plurality of outdoor units. A plurality of input ports, and a switching switch for switching between the validity of the single input port and the validity of all the input ports at the plurality of input ports. In the case of control, the changeover switch is operated so that only the single input port is valid, and the parameter received from the central monitoring device via the valid input port. Based on the control signal of the real signal, the same control signal which is a serial signal to which addresses corresponding to the plurality of outdoor units are added is transmitted to the plurality of outdoor units via the serial communication wiring. It is characterized by this.
[0009]
The invention according to claim 2 is the invention according to claim 1, wherein the relay device adds all addresses individually possessed by the plurality of outdoor units to the control signal received from the central monitoring device. The control signal is transmitted to the outdoor unit.
[0010]
The invention according to claim 3 is the invention according to claim 1, wherein when the central monitoring device individually controls the plurality of outdoor units, all the input ports of the relay device are enabled. The control switch is operated to transmit a control signal from the central monitoring device to the outdoor unit through the input port corresponding to the outdoor unit to be controlled.
[0011]
According to a fourth aspect of the invention, in the invention of the third aspect, the relay device adds an address of an outdoor unit to be controlled by the control signal to the control signal received from the central monitoring device. The control signal is transmitted to the outdoor unit to be controlled.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a system diagram showing a case of collective control of an outdoor unit by a central monitoring device in one embodiment of an air conditioning system according to the present invention, and FIG. 2 is a central diagram in one embodiment of FIG. It is a systematic diagram which shows the case of the individual control of the outdoor unit by a monitoring apparatus.
[0014]
These air conditioning systems 10 and 20 shown in FIGS. 1 and 2 include an outdoor unit 14 of the air conditioner 11, an outdoor unit 15 of the air conditioner 12, and an outdoor unit 16 of the air conditioner 13, and a relay device 17. And remotely controlled by the central monitoring device 18.
[0015]
The air conditioner 11 is configured such that, for example, one indoor unit 19 is connected to the outdoor unit 14 through a refrigerant pipe (not shown) and communication is possible using the communication wiring C1. The air conditioner 12 is configured to be communicable with the outdoor unit 15 by, for example, connecting two indoor units 21 with a refrigerant pipe (not shown) and using the communication wiring C2. Further, the air conditioner 13 is configured such that, for example, one indoor unit 22 is connected to the outdoor unit 16 through a refrigerant pipe (not shown), and communication is possible using the communication wiring C3.
[0016]
The relay device 17 is disposed between the outdoor units 14, 15 and 16 and the central monitoring device 18, and is connected to the outdoor units 14, 15 and 16 using the communication wiring B. In the case of the air conditioning system 10, it connects using the communication wiring A, In the case of the air conditioning system 20, it connects using communication wiring A1, A2, and A3.
[0017]
Parallel communication using parallel signals is performed between the central monitoring device 18 and the relay device 17 using the communication wiring A, A1, A2, or A3. Also, the relay device 17 and the outdoor units 14, 15, 16 are connected to each other. In the meantime, serial communication using a serial signal is periodically performed using the communication wiring B. The relay device 17 changes the communication form between the serial signal and the parallel signal. That is, the relay device 17 changes the communication form of the control signal received from the central monitoring device 18, that is, changes the parallel signal to a serial signal and transmits it to the outdoor units 14, 15, 16, and the outdoor units 14, 15, 16. The status signal received from the communication mode, that is, the serial signal is changed to a parallel signal and transmitted to the central monitoring device 18.
[0018]
The relay device 17 includes a number of input ports 23, 24, and 25 corresponding to the outdoor units 14, 15, 16. In the air conditioning system 20, the communication wiring A 1 is connected to the input port 23 and the communication wiring A 2 is connected to the input port 24. However, the communication wiring A3 is connected to the input port 25, respectively. In the air conditioning system 10, the communication wiring A is connected to a single input port (in this embodiment, the input port 23) that is effective as described later among the input ports 23, 24, and 25. A control signal from the central monitoring device 18 is input to the relay device 17 via these input ports 23, 24, 25.
[0019]
Further, the relay device 17 is provided with a changeover switch 26. When this changeover switch 26 is turned ON, only a single input port (in this embodiment, the input port 23) is enabled, and the other input ports (in this embodiment, the input ports 24 and 25) are made effective. Invalid. Further, the changeover switch 26 is changed over so that all of the input ports 23, 24 and 25 are made effective by being turned OFF.
[0020]
When the same control signal is transmitted from the central monitoring device 18 to all the outdoor units 14, 15 and 16 as in the air conditioning system 10, the outdoor units 14, 15 and 16 are collectively controlled. The switch 26 is turned on. Thereby, the control signal from the central monitoring device 18 is received at the input port 23 of the relay device 17 via the communication wiring A. The relay device 17 converts the received control signal from a parallel signal to a serial signal, adds all the addresses that the outdoor units 14, 15, and 16 individually have to the control signal, and uses the communication wiring B. It transmits to the outdoor units 14, 15 and 16.
[0021]
As described above, control signals for collectively controlling the outdoor units 14, 15, 16 include collective operation, collective stop, collective cooling with a fixed cooling temperature, collective heating with a fixed heating temperature, collective air with a fixed air flow, indoor unit This is a demand for limiting the capacities of 19, 21, and 22 to a certain amount. All the air conditioners 11, 12, and 13 are collectively controlled by the central monitoring device 18 by such a control signal.
[0022]
Further, when the outdoor units 14, 15, and 16 are individually controlled as in the air conditioning system 20, the changeover switch 26 is turned off. As a result, the central monitoring device 18 uses the communication wirings A1, A2, and A3 connected to the input ports 23, 24, and 25 corresponding to the outdoor units 14, 15, and 16 to be controlled, respectively, to control signals. Send.
[0023]
The relay device 17 in the air conditioning system 20 converts the received control signal from a parallel signal to a serial signal, and adds the addresses of the outdoor units 14, 15, and 16 to be controlled to the control signal. The control signal is transmitted to the outdoor units 14, 15, and 16 to be controlled using the communication wiring B. Only the outdoor unit 14, 15, 16 to be controlled receives the control signal to which the address indicating itself is added, and the air conditioner 11, 12, including the outdoor unit 14, 15, 16 to be controlled, 13 is controlled by the central monitoring device 18.
[0024]
Further, the relay device 17 of the air conditioning systems 10 and 20 includes a plurality of output ports (not shown) that receive state signals from the indoor units 14, 15, and 16. These output ports are provided corresponding to the number of outdoor units 14, 15 and 16. The operating states of the air conditioners 11, 12, and 13 having the outdoor units 14, 15, and 16 are received by the relay device 17 through the corresponding output ports of the relay device 17, and the communication mode is changed in the relay device 17. To the central monitoring device 18. Examples of the state signal include an operation output and an alarm output.
[0025]
Therefore, according to the said embodiment, there exists the following effect.
[0026]
The relay device 17 that is arranged between the central monitoring device 18 and the outdoor units 14, 15, and 16 and changes the communication mode is effective for all the input ports 23, 24, and 25, and for a single input port 23. The air conditioner which has the changeover switch 26 which switches only effective and the central monitoring apparatus 18 transmits the same control signal to the outdoor units 14, 15 and 16 and controls these outdoor units 14, 15 and 16 collectively. In the case of the system 10, the changeover switch 26 is operated so that only the input port 23 is enabled, and a control signal from the central monitoring device 18 is transmitted to all the outdoor units 14, 15 and 16 through the input port 23. Is done. Since the same control signal can be transmitted from the central monitoring device 18 to the outdoor units 14, 15 and 16 by switching the changeover switch 26 as described above of the relay device 17, the conventional transition wires 112 and 113 (FIG. 4). This eliminates the need for wiring and reduces wiring, thereby reducing costs.
[0027]
As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.
[0028]
【The invention's effect】
According to the air conditioning system according to the first to fourth aspects of the present invention, the wiring can be saved and the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a system diagram showing a case of collective control of an outdoor unit by a central monitoring device in an embodiment of an air conditioning system according to the present invention.
FIG. 2 is a system diagram showing a case of individual control of an outdoor unit by the central monitoring device in the embodiment of FIG. 1;
FIG. 3 is a system diagram showing a first prior art of an air conditioning system.
FIG. 4 is a system diagram showing a second prior art of an air conditioning system.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Air conditioning system 14,15,16 Outdoor unit 17 Relay apparatus 18 Central monitoring apparatus 23,24,25 Input port 26 Changeover switch

Claims (3)

In the air conditioning system in which the central monitoring device can control a plurality of outdoor units of the air conditioning device,
A relay device that is connected to the central monitoring device by parallel communication wiring, is connected to the plurality of outdoor units by a single serial communication wiring, and changes a communication mode between the central monitoring device and the plurality of outdoor units. Arranged,
The relay apparatus includes a plurality of input ports corresponding to the plurality of outdoor units, and switching between switching the validity of a single input port and the validity of all the input ports at the plurality of input ports. Have a switch,
When the central monitoring device collectively controls a plurality of the outdoor units, the effective input port from the central monitoring device is operated by operating the changeover switch so that only the single input port is effective. The same control signal, which is a serial signal to which addresses corresponding to the plurality of outdoor units are added, is transmitted to the plurality of outdoor units based on the control signal of the parallel signal received via the serial communication wiring. An air conditioning system characterized by being configured as described above.   The relay apparatus is configured to add all addresses individually possessed by a plurality of outdoor units to the control signal received from the central monitoring apparatus, and transmit the control signal to all the outdoor units. The air conditioning system according to claim 1.   When the central monitoring device individually controls the plurality of outdoor units, the switch corresponding to the outdoor unit to be controlled is operated by operating the changeover switch so that all the input ports of the relay device are enabled. 2. The air conditioning system according to claim 1, wherein a control signal is transmitted from the central monitoring device to the outdoor unit via an input port.

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