JPH01112897A - Centralized control system for air conditioner - Google Patents

Abstract

PURPOSE:To minimize regulations of remote control, the number of connected air conditioners, wire diameter of a transmission path and total extension by providing a repeating installation on the transmission path and amplifying and compensating a control signal attenuated on a the transmission path. CONSTITUTION:The repeating installation is inserted into the transmission path. A transmitting circuit 6 and a receiving circuit 7 of the repeating installation are insulated electrically by a photocoupler, etc., and connected to a microcomputer 8. A transmitting circuit 9 and a receiving circuit 10 are insulated electrically and connected to the microcomputer 8 in the same way. The transmitting circuit 6 and a receiving circuit 7 are connected to the transmission path on a centralized control device 3 side, on the other hand, the transmitting circuit 9 and the receiving circuit 10 are connected to the transmission path on the side where the centralized control device is not directly connected. Thus, the regulations of the remote control, the number of connected air conditioner, the wire diameter of the transmission path and the total extension are minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a centralized control system for air conditioners, and particularly to extension of transmission lines thereof.

[Conventional technology]

FIG. 4 is a block diagram of a conventional centralized 117 control system for an air conditioner disclosed in, for example, Japanese Patent Application Laid-Open No. 60-204003. In the figure, 1 is a remote controller (hereinafter referred to as a remote control) equipped with a transmitting/receiving means and an address setting means, 2 is an air conditioner equipped with a transmitting/receiving means and an address setting means, and 3 is a remote controller equipped with a transmitting/receiving means and a power supply circuit for the remote control. The central control device 4 is a transmission path for transmitting a tone burst signal in which necessary information is superimposed on a remote control power source. The remote control unit is driven by being supplied with power from a power supply circuit provided in the central control device 3 via the transmission path 4. Remote control 1. Air conditioner 2. The central control device 3 outputs a tone burst signal modulated by a transmitting circuit according to a predetermined rule as necessary, and exchanges information via a transmission path 4.

[Problem that the invention seeks to solve]

In this conventional system, the remote control power source and the tone burst signal are superimposed on the transmission line 4, and the resistance of the transmission line 4 causes a voltage drop in the remote control power source. Air conditioner 2. Central control device 3. The impedance of the transmission line 4 causes g-attenuation of the peak value of the tone burst signal. Therefore, remote control 1. It is necessary to regulate the number of connected air conditioners 2, the TL wire diameter of the transmission line 4, and the total length.

This invention was made to solve the above-mentioned problems, and it has problems with the number of remote controllers and air conditioners connected, and the number of transmission lines. ``The purpose is to obtain a centralized control system for air conditioners with fewer restrictions on wire diameter and total length.

[Means for solving problems]

In the conventional system described above, a relay device is inserted in the middle of the transmission path, and the relay device includes a receiving circuit connected to one transmission path, a transmitting circuit connected to the other transmission path, and a transmitting circuit connected to the other transmission path. When there is an input to the receiving circuit connected to the receiving circuit and transmitting circuit connected to one transmission line, it is amplified and output from the transmitting circuit connected to the other transmission line, and the input is output from the transmitting circuit connected to the other transmission line. When there is an input to the receiving circuit, the received signal is amplified and outputted from the transmitting circuit connected to one of the transmission lines, but not simultaneously from both transmission circuits.

(Function) With this configuration, it is possible to compensate for the decrease in control signals in the transmission path, and it is also possible to prevent interference due to simultaneous output of both transmissions (a circuit) in the repeater.

[Examples] The present invention will be explained below using examples. FIG. 1 is a block diagram of a centralized control system for an air conditioner, which is an embodiment of the present invention.

In FIG. 1, a relay device 5 is inserted in the middle of a transmission path 4. As shown in FIG. Remote control 1. Air conditioner 2. Since the central control device 3 is similar to the conventional device shown in FIG. 4, its explanation will be omitted. The relay device 5 is composed of functional blocks shown in FIG. In the figure, transmitting circuit 6. The receiving circuit 7 is electrically insulated by a photocoupler or the like (not shown) and connected to a microcomputer (hereinafter referred to as microcomputer) 8. Transmission circuit 9
．． The receiving circuit 10 is similarly electrically insulated and connected to the microcomputer 8. Transmission circuit 6. Receiver 3 circuit 7 is central control device 3
side transmission line 4a, and one transmitting circuit 9. The receiving circuit 10 is connected to the transmission line 4b on the side to which the central control device 3 is not directly connected.

Since the transmission line 4b is electrically insulated from the transmission line 4a, the power supply circuit 11 is connected thereto, and the remote control power is supplied to the transmission line 4b. The problem will be resolved.

The microcomputer 8 outputs to the transmitting circuit 6 from the 01 output terminal, the transmitting circuit 9 from the 02 output terminal, and the receiving circuit 7 or 611.
12 input terminals are input from the receiving circuit IO to the input terminals.

Next, the operation will be explained using the flowchart shown in FIG. This flowchart is based on the microcomputer 8 shown in Figure 2.
This figure shows the part that performs transmission/reception control processing.

First, in step 201, it is determined whether there is a large If input, and 1
If there is one person available, first turn on the 02 output in step 202. In step 203, it is determined whether there is 11 manpower and the system waits until 11 manpower is exhausted. 11 When the human power is exhausted, turn off the 02 output in step 204, and turn off the 02 output in step 20.
Return to 1.

Step 20 if there is no 11 manpower in step 201
Proceed to 5, I2 Are you strong enough?1! j1 is set, and when there is 12 manpower, the 01 output is turned on in step 206. In step 207, it is determined whether 12 manpower is available and waits until the 12 manpower is exhausted. 12 Step 20 when the human power is gone
At step 8, the 01 output is turned off and the process returns to step 201.

If there is no 12 manpower in step 205, step 20
Return to 1.

Through the above processing, it becomes possible to output the signal received by the receiving circuit 7 to the transmitting circuit 9, and to output the signal received by the receiving f3 circuit 10 to the transmitting circuit 6, and also from the transmitting circuits 6 and 9 at the same time. Since the tone burst signal is not output, the tone burst signal output from the transmitter circuit 6 is manually input to the receiver circuit 7, amplified and outputted from the transmitter circuit 9, and further transmitted to the receiver circuit l.
0 manually and output from the transmitter circuit 6.
The received signals are transmitted to the same transmission path 4 to prevent relaying from becoming impossible.

〔Effect of the invention〕

As described above, according to the present invention, the relay device is provided in the middle of the transmission path to amplify and compensate for the control signal attenuated on the transmission path, so that the remote controller 1. The number of connected air conditioners 2,
This has the effect of reducing restrictions on the wire diameter and total length of the transmission line 4.

[Brief explanation of the drawing]

The first country is a block diagram of a centralized control system for an air conditioner which is an embodiment of the present invention, FIG. 2 is a functional block diagram of a relay device of the same embodiment, and FIG. 3 is a diagram showing the operation of the same relay device. The flowchart in FIG. 4 is a block diagram of a conventional air conditioner centralized control system. In the diagram, 1 is a remote controller, 2 is an air conditioner, and 3 is a remote controller.
4 is a transmission line, 5 is a relay device, 6.9 is a transmitting circuit, and 7. is a central control device; IO is a receiving circuit. Note that the same symbol indicates the same or equivalent part.

Claims (2)

[Claims] (1) A plurality of remote controllers having a transmitting/receiving means and an address setting means, a plurality of air conditioners also having a transmitting/receiving means and an address setting means, and a central control device having a transmitting/receiving means and centrally controlling the plurality of air conditioners. , a transmission line that interconnects the plurality of remote controllers, the plurality of air conditioners, and the central control device, and a relay device inserted in the middle of the transmission path, and the relay device includes one A receiving circuit connected to the transmission line, a receiving circuit connected to the transmitting circuit and the other transmission line,
When there is an input to the transmitting circuit and the receiving circuit connected to one transmission line, it is amplified and output from the transmitting circuit connected to the other transmission line, and then input to the receiving circuit connected to the other transmission line. A centralized control system for an air conditioner, characterized in that it is equipped with means for amplifying the signal and outputting it from a transmitting circuit connected to one transmission line, but not simultaneously outputting it from both transmitting circuits. (2) The relay device has a remote control power source connected to a transmission line portion on the side that is not directly connected to the central control device, and the centralized control of the air conditioner according to claim 1 is characterized in that system.