JP3144876B2 - Air conditioner communication device - Google Patents

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 which controls a plurality of devices by using a data transmission technique has been developed (for example, Japanese Patent Application Laid-Open No. Sho 62-196928).

Hereinafter, an example of a conventional communication device for an air conditioner will be described with reference to the drawings.

FIG. 4 shows a configuration of a communication device of a conventional air conditioner. In FIG. 4, 1 is a transmission line for transmitting data, 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. The transmission / reception circuits 4 and 5 for transmitting and receiving data are provided.
And a power receiving device 6 that receives a direct current from the power supply and obtains power.
Reference numeral 7 denotes a power supply device for supplying DC power to the transmission line 1, and reference numeral 8 denotes a load resistance unit, which internally includes a resistor 9 serving as a load when the transmission / reception circuits 4 and 5 transmit, and a DC power supplied to the transmission line 1. And a capacitor 10 for shutting off.

[0005] The operation of the communication device for an air conditioner configured as described above will be described below.

First, the monitoring device 3 receives the direct current supplied from the power supply device 7 to the transmission line 1 by the power receiving device 6 to obtain the power.
Then, 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. 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 acts as a load when the transmission / reception circuits 4 and 5 transmit, thereby suppressing waveform distortion of 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, connection work of the power supply device 7 and the load resistance unit 8 is performed separately from connection work of the air conditioner 2 and the monitoring device 3 to the transmission line 1. Therefore, there is a possibility that the equipment may malfunction due to a construction error, and there is a disadvantage 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, thereby 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 simplify simplification, shorten a construction period, and save space.

Another object of the present invention is to eliminate the connection work of the power supply device and the load resistance unit to the transmission line and to eliminate the installation space for the power supply device and the load resistance unit, thereby simplifying the connection work and reducing the work. It is an object of the present invention to provide a communication device of an air conditioner that can shorten a period and save space, and can change a power supply capacity in accordance with a power receiving capacity of a device that receives power from a transmission line. I do.

[0011]

In order to achieve this object, a communication device for an air conditioner according to the present invention performs data transmission.
A power supply device for supplying DC power 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 blocking DC power 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 the transmission line and the transmission line in parallel.

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; The configuration includes a switching circuit that simultaneously connects the power supply device and the load resistance unit to the transmission line in parallel when a connection signal is input instead of the switch.

[0013] Further, a power supply device for supplying DC power to a pair of transmission lines for performing data transmission, and a load in which a resistor serving as a load of a transmission circuit and a capacitor for blocking DC power supplied to the transmission line are connected in series. A resistance unit, a connection switch for connecting the power supply device and the load resistance unit in parallel to the transmission line at the same time, a jumper wire connected in series with the load resistance unit, and a diode for preventing a reverse flow of DC to the power supply device. It is configured.

[0014]

According to the air conditioner communication device of the present invention, when connecting a plurality of air conditioners to a transmission line, the air conditioner can be turned on simply by turning on the connection switch of one of the air conditioners. Since the power supply device and the load resistance unit built in are connected to the transmission line, the connection work can be simplified, the work period can be shortened, and the space can be saved.

Further, when a plurality of air conditioners are connected to a transmission line, only by setting an address with an address setting switch, one of the air conditioners set to a specific address is set. The switching circuit operates with the connection signal from the connection signal generation means, and the power supply device and load resistance unit built in the air conditioner are connected to the transmission line, so that the connection work is simplified and the work period is shortened. ,
In addition, space can be saved.

When a plurality of air conditioners are connected to a transmission line, a power supply device and a load incorporated in the air conditioner can be built by simply turning on a connection switch of one of the air conditioners. Since the resistance unit is connected to the transmission line, the connection work can be simplified, the construction period can be shortened, and space can be saved.Furthermore, when the power receiving capacity of the device receiving power from the transmission line exceeds the power supply capacity By turning on the connection switches of other air conditioners after cutting the jumper wires, even if the number of connected power supply devices increases, the number of connected load resistance units remains one. The power supply capacity can be increased without considering the influence on the transmission data waveform due to the change in the resistance value. Further, since the diodes for preventing the reverse flow of the direct current to the power supply devices are connected in series to the respective power supply devices, the power supply devices can be protected even if a plurality of power supply 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.
The same components as those in the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows a configuration of a communication device of an air conditioner according to a 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 for connecting the power supply device 7 and the load resistance unit 8 to the transmission line 1 simultaneously in parallel.

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

When the installer installs the air conditioner 2 and connects to the transmission line 1, when 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 a plurality of air conditioners 2 are connected to the transmission line 1 and one of the connection switches 11 is turned on, the connection work of the power supply device 7 and the load resistance unit 8 to the transmission line 1 can be performed. This 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 the present embodiment includes the power supply device 7, the load resistance unit 8, and the connection switch 11.
Power supply device 7 and load resistance unit 8
Is connected to the transmission line 1, thereby simplifying the connection work, shortening the work period, and saving space.

Next, a second embodiment of a 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 denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 2 shows a configuration of a communication device of an air conditioner according to a second embodiment of the present invention. In FIG. 2, 12 is an analog switch circuit, and 13 is an air conditioner 2
, An address setting switch for determining an address, 14 is a power supply, 15 is a ground, 16 is a pull-up resistor group, and 17 is an AND circuit. This embodiment is different from the air conditioner communication device according to the first embodiment in that an address setting switch 13 is further provided.
, Power supply 14, ground 15, pull-up resistor group 1
6, an AND circuit 17, and an analog switch circuit 12 instead of the connection switch 11.

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 address of the air conditioner 2 is set to "0".
, The address setting switches 13 are all open, so that all the input signals to the AND circuit 17 are “H”.
And the output signal of the AND circuit 17 becomes "H". Therefore, the analog switch circuit 12 conducts, 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, the 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, the plurality of air conditioners 2 are connected to the transmission line 1
To connect to the address setting switches 13
When the address is set, the power supply 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 supply device and the load resistance unit for the transmission line 1 are connected. Connection work is not required, and the installation space for the power supply device and the load resistance unit is not required.

As described above, the communication device of the air conditioner according to the present embodiment includes the power supply device 7, the load resistance unit 8, the analog switch circuit 12, the address setting switch 13, the power source 14, the ground 15, the pull Up resistor group 16,
Since the power supply device 7 and the load resistance unit 8 are connected to the transmission line 1 simply by setting an address with the address setting switch 13 and setting a specific address, since the AND circuit 17 is used, the connection work is simplified. , Shortening the construction period, and saving space.

Next, a third embodiment of a 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 denoted by the same reference numerals, and detailed description thereof is omitted.

FIG. 3 shows the configuration of a communication device of an air conditioner according to a third embodiment of the present invention. In FIG. 3, reference numeral 18 denotes a jumper wire, and reference numeral 19 denotes a diode for preventing a reverse flow of direct current to the power supply device 7. In this embodiment, a communication device for an air conditioner according to the first embodiment is further provided with a jumper line 1.
8 and a diode 19.

The operation of the communication device of the 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 set to the jumper line 1.
When the power supply device 8 is inserted without cutting, the power supply device 7 and the load resistance unit 8 built in the air conditioner 2 are connected to the transmission line 1 at the same time. 7, only the load resistance unit 8 is not connected. At this time, the power supply device 7 is connected to the transmission line 1 via the diode 19.

Therefore, the plurality of air conditioners 2 are connected to the transmission line 1
When connecting to a plurality of connection switches 1 according to the power receiving capacity of the monitoring device 3 receiving power from the transmission line 1 and obtaining power.
1 and the power supply capacity is increased, if only one jumper line 18 is cut off, the load resistance value does not fluctuate, and the transmission data waveform is not affected.
Even if there is a variation in the potential of the DC supplied from the power supply, since the diode 19 prevents the reverse flow of the DC to the power supply device 7,
The power supply devices 7 are not short-circuited and destroyed.

As described above, the communication device of the air conditioner of the present 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. By simply turning on the switch 11, the power supply device 7 and the load resistance unit 8 are connected to the transmission line 1, so that the connection work can be simplified, the work period can be shortened, and the space can be saved. 1
1 and cutting the jumper line 18, only the power supply device 7 is added, and the power supply capacity can be easily adjusted to the power receiving capacity without affecting the transmission data waveform and without destroying the power supply device 7. Can be increased.

[0035]

As described above, according to the present invention, a power supply device for supplying a direct current to a pair of transmission lines for performing data transmission, a resistor serving as a load of a transmission circuit, and a direct current supplied to the transmission line are cut off. The air conditioner communication device is composed of a load resistance unit in which a capacitor is connected in series and a connection switch that connects the power supply device and the load resistance unit in parallel to the transmission line at the same time. 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 work period can be shortened, and the space can be saved.

Furthermore, 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, When a connection signal is input instead of a switch, a power supply device and a switching circuit for simultaneously connecting a load resistance unit to a transmission line in parallel are provided. By simply setting an address with an address setting switch, transmission is automatically performed. 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 becomes unnecessary, so that the connection work can be simplified, the construction period can be shortened, and the space can be saved.

Further, a power supply device for supplying DC power to a pair of transmission lines for data transmission, and a load in which a resistor serving as a load of a transmission circuit and a capacitor for blocking DC power supplied to the transmission line are connected in series. A resistance unit, a connection switch for connecting the power supply device and the load resistance unit in parallel to the transmission line at the same time, a jumper wire connected in series with the load resistance unit, and a diode for preventing a reverse flow of DC to the power supply device. Since the communication device of the air conditioner is configured, simply by turning on the connection switch, the power supply device and load resistance unit can be automatically connected to the transmission line, simplifying the connection work, shortening the construction period, and Space saving can be achieved.Furthermore, by turning on the connection switch and disconnecting the jumper line, only the power supply device can be added, and the power receiving capacity of the device that receives power from the transmission line can be adjusted. The feeding capacity can be varied Te.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a communication apparatus for an air conditioner according to a second embodiment of 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 of a conventional air conditioner.

[Explanation of symbols]

 Reference Signs List 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

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04Q 9/00-9/16 F24F 11/02

Claims (3)

(57) [Claims] 1. A power supply device for supplying DC power to a pair of transmission lines for performing data transmission, and a load in which a resistor serving as a load of a transmission circuit and a capacitor for blocking DC power supplied to the transmission line are connected in series. A communication device for an air conditioner, comprising: a resistance unit; and a connection switch for simultaneously connecting the power supply device and the load resistance unit to a transmission line in parallel. 2. A load in which a power supply device for supplying DC power to a pair of transmission lines for performing data transmission, a resistor serving as a load of a transmission circuit and a capacitor for blocking DC power supplied to the transmission line are connected in series. A resistance unit, 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 switching for simultaneously connecting the power supply device and the load resistance unit to a transmission line in parallel when a connection signal is input. A communication device for an air conditioner comprising 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 for preventing a reverse flow of direct current to the power supply device.