JPH05252563A - Communication equipment for air conditioner - Google Patents

Abstract

(57) [Summary] [Object] The present invention simplifies the connection work by eliminating the installation work of the power supply device and the load resistance unit to the transmission line and eliminating the installation space of the power supply device and the load resistance unit. An object of the present invention is to provide a communication device for an air conditioner that can shorten the construction period and save space. [Structure] A power supply device 7 for supplying direct current to a pair of transmission lines 1 for data transmission, a resistor 9 serving as a load of a transmission circuit, and a capacitor 10 for interrupting direct current supplied to the transmission line 1 are connected in series. And a connection switch 11 for simultaneously connecting the power feeding device 7 and the load resistance unit 8 to the transmission line 1 in parallel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication device of an air conditioner for transmitting data using a transmission line as a medium.

[0002]

2. Description of the Related Art In recent years, an air conditioner for controlling a plurality of devices using a data transmission technique has been developed (for example, Japanese Patent Laid-Open No. 62-196928).

An example of a conventional air conditioner communication device will be described below with reference to the drawings.

FIG. 4 shows the configuration of a communication device for a conventional air conditioner. In FIG. 4, 1 is a transmission line for data transmission, 2 is an air conditioner, 3 is a monitoring device for controlling and monitoring the air conditioner 2, and the air conditioner 2 and the monitoring device 3 are data on the transmission line 1 respectively. It has transmission / reception circuits 4 and 5 for transmitting / receiving the
It has a power receiving device 6 which receives a direct current from the power source to obtain a power source.
Further, 7 is a power supply device for supplying direct current to the transmission line 1, 8 is a load resistance unit, and internally has a resistor 9 serving as a load when the transmission / reception circuits 4 and 5 transmit, and direct current supplied to the transmission line 1. And a capacitor 10 for shutting off.

The operation of the air conditioner communication device configured as described above will be described below.

First, the monitoring device 3 receives the direct current fed from the power feeding device 7 to the transmission line 1 by the power receiving device 6 to obtain a power source.
Then, the data for controlling the air conditioner 2 is transmitted to the transmission line 1 using the transmission / reception circuit 5. The transmitted data is decoded by the transmission / reception circuit 4, and the air conditioner 2 controls the device according to the decoded data. Further, the air conditioner 2 uses the transmission / reception circuit 4 to transmit data representing the operating state to the transmission line 1
Send on. The monitoring device 3 monitors the air conditioner 2 by decoding the transmitted data by the transmission / reception circuit 5.

Further, by connecting the load resistance unit 8, the resistance 9 becomes a load when transmitting / receiving by the transmitting / receiving circuits 4 and 5, and suppresses the waveform distortion of the transmission data. At this time, the capacitor 10 has a function of cutting off the supplied direct current and flowing only the signal component to the resistor 9.

[0008]

However, in the above-mentioned conventional configuration, the connection work of the power supply device 7 and the load resistance unit 8 is performed separately from the connection work of the air conditioner 2 and the monitoring device 3 to the transmission line 1. Since it is necessary, there is a possibility that the equipment may malfunction due to a construction mistake, and there is a drawback in that the installation space for the power supply device 7 and the load resistance unit 8 must be secured.

The present invention solves the above-mentioned conventional problems, and eliminates the work of connecting the power supply device and the load resistance unit to the transmission line, and eliminates the installation space for the power supply device and the load resistance unit. It is an object of the present invention to provide a communication device for an air conditioner, which can simplify the construction, shorten the construction period, and save space.

Another object of the present invention is to simplify the connection work by eliminating the work for connecting the power supply device and the load resistance unit to the transmission line and eliminating the installation space for the power supply device and the load resistance unit. It is an object of the present invention to provide a communication device for an air conditioner, which can shorten the period and save space, and can change the power supply capacity in accordance with the power reception capacity of a device that receives power from a transmission line. To do.

[0011]

In order to achieve this object, the communication device of the air conditioner of the present invention performs data transmission 1
A power supply device for supplying direct current to a pair of transmission lines, a load resistance unit in which a resistor serving as a load of a transmission circuit and a capacitor for interrupting direct current supplied to the transmission line are connected in series, a power supply device and a load resistance unit And a connection switch for simultaneously connecting and to the transmission line in parallel.

Furthermore, an address setting switch for determining an address of a device connected to the transmission line, connection signal generating means for generating a connection signal when the address setting switch is set to a specific address, and a connection It has a configuration including a switching circuit that simultaneously connects the power feeding device and the load resistance unit in parallel to the transmission line when a connection signal is input instead of the switch.

Further, a load in which a power supply device for supplying direct current to a pair of transmission lines for data transmission, a resistor serving as a load of the transmission circuit and a capacitor for interrupting direct current supplied to the transmission line are connected in series. From the resistance unit, the connection switch that simultaneously connects the power supply device and the load resistance unit in parallel to the transmission line, the jumper wire that is connected in series with the load resistance unit, and the diode that blocks the reverse flow of direct current to the power supply device. It is configured.

[0014]

The communication device for an air conditioner according to the present invention, when connecting a plurality of air conditioners to a transmission line, simply turns on the connection switch of one of the air conditioners to connect them to the transmission line. Since the power feeding device and the load resistance unit built in the are connected to the transmission line, the connection work can be simplified, the construction period can be shortened, and the space can be saved.

Furthermore, when connecting a plurality of air conditioners to a transmission line, only by setting an address with an address setting switch, one of the air conditioners set to a specific address can be set. The switching circuit operates according to the connection signal from the connection signal generation means, and the power supply device and load resistance unit built into the air conditioner are connected to the transmission line, simplifying connection work and shortening the construction period. ,
And space saving can be achieved.

Further, when connecting a plurality of air conditioners to a transmission line, by only turning on the connection switch of one of the air conditioners, the power supply device and the load built in the air conditioner Since the resistance unit is connected to the transmission line, connection work can be simplified, the construction period can be shortened, and space can be saved, and the power receiving capacity of the device receiving power from the transmission line exceeds the power supply capacity. In this case, by turning on the connection switch of another air conditioner after disconnecting the jumper wire, the number of connected load resistance units remains one even if the number of connected power supply devices increases. The power supply capacity can be increased without considering the influence of the change in the resistance value on the transmission data waveform. Further, since the diodes that block the reverse flow of the direct current to the power feeding device are connected in series to the respective power feeding devices, the power feeding device can be protected even when a plurality of power feeding devices are connected in parallel.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a communication device for an air conditioner according to the present invention will be described below with reference to the drawings.
It should be noted that the same components as those of the related art will be denoted by the same reference numerals and detailed description thereof will be omitted.

FIG. 1 shows the configuration of a communication device for an air conditioner according to the first embodiment of the present invention. In FIG. 1, 7 is a power supply device, 8 is a load resistance unit, and 11 is a connection switch that connects the power supply device 7 and the load resistance unit 8 to the transmission line 1 in parallel at the same time.

The operation of the air conditioner communication device configured as described above will be described below.

When the equipment installer installs the air conditioner 2 and connects the transmission line 1, the connection switch 11 is turned on.
The power supply device 7 and the load resistance unit 8 built in the air conditioner 2 are automatically connected to the transmission line 1. Therefore, when connecting a plurality of air conditioners 2 to the transmission line 1, if one of the connection switches 11 is turned on, connection work of the power feeding device 7 and the load resistance unit 8 to the transmission line 1 will be performed. It is unnecessary, and the installation space for the power supply device 7 and the load resistance unit 8 is also unnecessary.

As described above, the communication device of the air conditioner of this embodiment comprises the power supply device 7, the load resistance unit 8 and the connection switch 11, so that the connection switch 11
Just turn on the power supply device 7 and the load resistance unit 8
Is connected to the transmission line 1, so that the connection work can be simplified, the construction period can be shortened, and the space can be saved.

Next, a second embodiment of the communication device for an air conditioner according to the present invention will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 2 shows the configuration of a communication device for an air conditioner according to the second embodiment of the present invention. In FIG. 2, 12 is an analog switch circuit, 13 is an air conditioner 2
Is an address setting switch that determines the address of, a reference numeral 14 is a power supply, a reference numeral 15 is a ground, a reference numeral 16 is a pull-up resistor group, and a reference numeral 17 is an AND circuit. This embodiment is the same as the air conditioner communication device according to the first embodiment, and further includes an address setting switch 13
, Power supply 14, ground 15, and pull-up resistor group 1
6, an AND circuit 17, and an analog switch circuit 12 in place of the connection switch 11.

The operation of the air conditioner communication device configured as described above will be described below.

When the equipment installer installs the air conditioner 2 and connects it to the transmission line 1, the address of the air conditioner 2 is set to "0".
When set to, all the address setting switches 13 are open, so all the input signals to the AND circuit 17 are "H".
Then, the output signal of the AND circuit 17 becomes "H". Therefore, the analog switch circuit 12 becomes conductive and the air conditioner 2
Power supply device 7 and load resistance unit 8 built in
Are automatically connected to the transmission line 1.

When the address of the air conditioner 2 is set to a value other than "0", for example, "1", the input signal to the AND circuit 17 becomes "HHHL" and the output signal of the AND circuit 17 becomes "L". .. Therefore, analog switch circuit 1
2 does not conduct, and the power supply device 7 and the load resistance unit 8 built in the air conditioner 2 are not connected to the transmission line 1.

Therefore, a plurality of air conditioners 2 are connected to the transmission line 1
When connecting to, those address setting switches 13
If the address is set with, the power feeding device 7 and the load resistance unit 8 built in the air conditioner 2 set to the specific address are connected to the transmission line 1, and the power feeding device and the load resistance unit to the transmission line 1 are connected. No connection work is required, and the installation space for the power supply unit and load resistance unit is also unnecessary.

As described above, the communication device of the air conditioner of the present embodiment has the power feeding device 7, the load resistance unit 8, the analog switch circuit 12, the address setting switch 13, the power supply 14, the ground 15, and the pulling unit. Up resistance group 16,
Since it is composed of the AND circuit 17, the power supply device 7 and the load resistance unit 8 are connected to the transmission line 1 only by setting an address with the address setting switch 13 and setting it to a specific address. It is possible to reduce the construction period, shorten the construction period, and save space.

Next, a third embodiment of the communication device for an air conditioner according to the present invention will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 shows the configuration of a communication device for an air conditioner according to the third embodiment of the present invention. In FIG. 3, reference numeral 18 is a jumper wire, and 19 is a diode that blocks a reverse flow of direct current to the power supply device 7. This embodiment is the same as the air conditioner communication device according to the first embodiment, and further includes a jumper wire 1.
8 and a diode 19 are provided.

The operation of the communication device for an air conditioner configured as described above will be described below.

When the equipment installer installs the air conditioner 2 and connects it to the transmission line 1, the connection switch 11 is moved to the jumper line 1.
If 8 is turned on without disconnecting, the power feeding device 7 and the load resistance unit 8 built in the air conditioner 2 are simultaneously connected to the transmission line 1, but if the jumper wire 18 is turned on and then turned on, the power feeding device 7 Only 7 is connected and the load resistance unit 8 is not connected. At this time, the power feeding device 7 is connected to the transmission line 1 via the diode 19.

Therefore, a plurality of air conditioners 2 are connected to the transmission line 1
A plurality of connection switches 1 according to the power receiving capacity of the monitoring device 3 that receives power from the transmission line 1 to obtain power when connecting to
Even if 1 is turned on to increase the power feeding capacity, the load resistance value does not change if the jumper wire 18 is cut off leaving only one unit, so that the transmission data waveform is not affected and the power feeding device 7
Since the diode 19 blocks the reverse flow of the direct current to the power feeding device 7 even if the potential of the direct current fed from the
The power supply devices 7 are not short-circuited and destroyed.

As described above, the communication device of the air conditioner of this embodiment is composed of the power supply device 7, the load resistance unit 8, the connection switch 11, the jumper wire 18, and the diode 19, so that the connection is made. The power supply device 7 and the load resistance unit 8 are connected to the transmission line 1 only by turning on the switch 11, so that the connection work can be simplified, the construction period can be shortened, and the space can be saved. 1
By inputting 1 and disconnecting the jumper wire 18, only the power feeding device 7 is added, and the power feeding capacity can be easily adjusted according to the power receiving capacity without affecting the transmission data waveform or destroying the power feeding device 7. Can be increased.

[0035]

As described above, according to the present invention, a power supply device for supplying direct current to a pair of transmission lines for data transmission, a resistor serving as a load of a transmission circuit, and a direct current supplied to the transmission line are cut off. Since the communication device of the air conditioner is composed of a load resistance unit in which a capacitor is connected in series and a connection switch that simultaneously connects the power supply device and the load resistance unit in parallel to the transmission line, simply turn on the connection switch. Thus, the power supply device and the load resistance unit can be automatically connected to the transmission line, so that the connection work can be simplified, the construction period can be shortened, and the space can be saved.

Further, an address setting switch for determining an address of a device connected to the transmission line, a connection signal generating means for generating a connection signal when the address setting switch is set to a specific address, and a connection When a connection signal is input instead of the switch, a switching circuit that connects the power supply device and the load resistance unit to the transmission line in parallel at the same time is provided, and the address is automatically set by setting the address with the address setting switch. The power supply device and the load resistance unit can be connected to the line, and the installation space for the power supply device and the load resistance unit is unnecessary, so that the connection work can be simplified, the construction period can be shortened, and the space can be saved.

Further, a load in which a power feeding device for feeding a direct current to a pair of transmission lines for data transmission, a resistor serving as a load of a transmission circuit, and a capacitor for interrupting a direct current fed to the transmission line are connected in series From the resistance unit, the connection switch that simultaneously connects the power supply device and the load resistance unit in parallel to the transmission line, the jumper wire that is connected in series with the load resistance unit, and the diode that blocks the reverse flow of direct current to the power supply device. Since it configures the air conditioner communication device, you can automatically connect the power supply device and the load resistance unit to the transmission line by simply turning on the connection switch, simplifying the connection work, shortening the construction period, and Space can be saved, and by turning on the connection switch and disconnecting the jumper wire, only the power supply device can be added and the power receiving capacity of the equipment receiving power from the transmission line can be adjusted. The feeding capacity can be varied Te.

[Brief description of drawings]

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

FIG. 2 is a block diagram of a second embodiment of a communication device for an air conditioner according to the present invention.

FIG. 3 is a block diagram of a third embodiment of a communication device for an air conditioner according to the present invention.

FIG. 4 is a block diagram of a communication device for a conventional air conditioner.

[Explanation of symbols]

 7 Power Supply Device 8 Load Resistance Unit 11 Connection Switch 12 Switching Circuit 13 Address Setting Switch 17 Connection Signal Generation Means 18 Jumper Wire 19 Diode

Claims (3)

[Claims] 1. A load in which a power feeding device for feeding a direct current to a pair of transmission lines for data transmission, a resistor serving as a load of a transmission circuit, and a capacitor for blocking a direct current fed to the transmission line are connected in series. A communication device for an air conditioner, comprising: a resistance unit; and a connection switch that simultaneously connects the power supply device and the load resistance unit in parallel to a transmission line. 2. A load in which a power supply device for supplying direct current to a pair of transmission lines for data transmission, a resistor serving as a load of a transmission circuit, and a capacitor for interrupting direct current supplied to the transmission line are connected in series. A resistance unit and an address setting switch for determining the address of the device connected to the transmission line,
Connection signal generating means for generating a connection signal when the address setting switch is set to a specific address, and switching for simultaneously connecting the power feeding device and the load resistance unit in parallel to the transmission line when the connection signal is input. An air conditioner communication device including a circuit. 3. The communication device for an air conditioner according to claim 1, further comprising a jumper wire connected in series with the load resistance unit, and a diode that blocks a reverse flow of direct current to the power supply device.