JPH02110246A - Control device for airconditioner - Google Patents

Abstract

PURPOSE:To make it possible to reduce the load of a microcomputer for outdoor equipment in terms of a multi-type airconditioner by providing to said outdoor equipment a synchronizing means which synchronizes the timing which starts the transmission of a signal to said outdoor equipment from each indoor equipment and a reader which reads the signals synchronously transmitted from each indoor equipment at one time. CONSTITUTION:A transmission and reception starting means 82 is transferred to an outdoor equipment side from an indoor equipment side so that signals transmitted from each room may be synchronized. To synchronize the signals, at first, the indoor equipment outputs a signal 91 which informs operation start to the outdoor equipment. Every time when the indoor equipment in a room A receives a signal from the outdoor equipment, it outputs a signal subsequently. When a transmission start signal is transmitted from a chamber B, the outdoor equipment does not respond with the signal immediately, but saves time which can meet the transmission and reception from the chamber A. A reception port is concentrated to the same input port 39 for exclusive use so that simultaneous reading from every chamber may be available. Therefore, the load of a program is substantially equivalent to that of one room.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multi-system air conditioner control device in which a plurality of indoor units are connected to one outdoor unit.

[Conventional technology]

FIG. 6 is a circuit diagram of a conventional air conditioner control device disclosed in, for example, Japanese Unexamined Patent Publication No. 62-91745. In the figure, 1 is an AC power supply, 3.3 is a power line that supplies power to the outdoor unit, 2 is a load on the outdoor unit such as a compressor, 7 is an outdoor unit controller that controls the load, and 4 is its control signal. 5 is the indoor unit controller that generates the control signal, 6 is the signal line that transmits the
is the load on the indoor unit side, and 8, 9, 10.11 are photocouplers. FIG. 7 shows an example of the signal format in this case. In the figure, 21 is an indoor unit side output signal, 22 is an outdoor unit side output signal,
23 is a signal on the signal line 4.

FIG. 8.9 is a flowchart of the reception program of the outdoor microcomputer when the multi-system air conditioner transmits and receives signals in this signal format. Figure 10.

Figure 11 shows the timing of the signal.
In FIG. 1O, 71 is the beginning of the signal and 72 is the end of the signal. FIG. 12 is a block diagram of the signal system when there is an interface. In the figure, 81 is a transmitting/receiving means on the indoor unit side, 82 is a transmission start means, 83 is a transmitting/receiving means on the outdoor unit side, 84 is an interface, and 85 is a signal line. It is.

Further, FIG. 13 is a schematic diagram showing another conventional air conditioner control device disclosed in, for example, Japanese Patent Laid-Open No. 61-235630, and in the figure, 12 is an outdoor unit, 13.
14 is an indoor unit, 15 and 16 are remote controllers, and 17 is a signal line.

FIG. 14 shows an example of the signal format in this case, and in the figure,
24 is a remote control operation signal, 25 is a signal from room A, 26
．． 28 is response No. 43 from the outdoor unit, and 27 is a signal from room B.

Next, the operation will be explained. The control device shown in FIG. 6 is a system often used in general air conditioners in which the indoor unit and outdoor unit correspond one-to-one. In most cases, the power source 1 is located indoors, and in this case, the indoor unit controller 5 is always energized and in a standby state, and starts energizing the outdoor unit in response to a command to start operating the air conditioner. Until then, the outdoor unit side controller 7 is OFF, so in most cases, the timing and other aspects of signal transmission and reception performed using the signal line 4 while the air conditioner is operating are controlled by the indoor unit side auxiliary # unit 5. It's lively. Signals are transmitted and received alternately indoors and outdoors without any gaps in Figure 7 23
It's going like this.

The control device shown in Figure 13 uses a transmitting/receiving method that cannot be used for multi-system air conditioners or when performing IIHI on multiple air conditioners at once. 17, all units 12°13.14, remote control 1
This method is a continuation of 5.18. This signal transmission device is connected to each unit 12.13.14 and remote control 15.16.
A separate address is assigned to each address, and only signals from that address are received. Transmission and reception of signals is performed intermittently as shown in FIG.

(Problem to be solved by the invention!!) Since the conventional air conditioner control device is configured as described above, the outdoor microcontroller when the system shown in Figure 6 is used in a multi-system air conditioner. The received partial program is shown in Figures 8 and 9.
The flowchart will be as shown in the figure. For example, this is indoor 3
In the case of indoor units, the timer interrupt interval for sensing reception ports must be divided by the number of indoor units, as shown in FIG. The outdoor unit control microcomputer must prioritize the operation of the inverter, so it cannot interrupt at very short intervals. Furthermore, as shown in Figure 10, the timing of each signal is off, so the 9th
As shown in the figure, it is necessary to go through the trouble of reading and storing the entire -degree signal from beginning to end, and then retrieving and synthesizing the data. When this method is used in a multi-method air conditioner, the program load required for signal transmission, reception, and synthesis on the outdoor unit microcomputer is large, so the signal transmission, reception, and synthesis are divided into parts as shown in Figure 12. An interface microcomputer 84 must be provided.

Even if it is not provided, the outdoor unit control microcomputer has complicated software and can only operate in a limited time.

Also, when signal transmission is performed with the configuration shown in Figure 13,
-If reception fails, there are problems such as having to wait a long time before receiving the next signal, and limiting the amount and speed of information transmission.

This invention was made under these circumstances, and -
The purpose of this invention is to provide an air conditioner control device that can significantly reduce the load on the outdoor unit control microcomputer in a multi-system air conditioner that connects multiple indoor units to one outdoor unit. .

[Means to solve the problem]

In order to achieve the above object, the present invention configures a control device for an air conditioner as follows.

That is, in a multi-system air conditioner in which a plurality of indoor units are connected to one outdoor unit, the outdoor unit includes a synchronizing means for synchronizing the timing at which signals are started from each indoor unit to the outdoor unit; The apparatus is provided with means for simultaneously reading signals from each indoor unit that are synchronized and sent by a synchronizing means.

(Function) According to this configuration, it is possible to easily receive signals from each indoor unit and to synthesize the signals, and the load on the control microcomputer of the outdoor unit is significantly reduced.

〔Example) This invention will be explained below with reference to Examples.

Fig. 1 is a flowchart showing the operation of an "air conditioner control device" which is an embodiment of the present invention, Fig. 2 is a block diagram of its entire signal system, and Fig. 3 is a peripheral block of the outdoor unit control microcomputer. It is a diagram. In FIG. 1, 100 is a flowchart of the indoor unit, 101 is a flowchart of the outdoor unit, and 102 is a signal line signal. In fig.

81 is a transmitting/receiving means of the indoor unit; 82 is a transmitting/receiving starting means; 8
3 is a transmitting/receiving means of the outdoor unit, and 85 is a signal line. In FIG. 3, 31 is a control microcomputer for the outdoor unit, 39 is a human-powered boat in the microcomputer, 40 is also an output-only boat, 35 to 3B are transmitting/receiving signal conversion circuits for the indoor units in rooms A to D, and 32 33 is the base amplifier circuit for driving the power transistor of the inverter, and 33 is the base amplifier circuit for driving the inverter power transistor.
A relay drive circuit for driving the N10FF relay, and 34 a thermo amplifier circuit for amplifying the thermistor signal. 4 and 5 show the signal timing, and in the figures, 91 is the indoor unit side transmission start signal, 92 is the B room synchronization time, and 93 is the C room synchronization time.

Next, the operation of this embodiment will be explained. By moving the transmission/reception starting means 82 from the indoor unit side to the outdoor unit side as shown in the second figure, the signals from each room are synchronized as shown in FIG. 4. As a synchronization method, as shown in FIG. 5, first, the indoor unit outputs a signal 91 that notifies the outdoor unit of the start of operation. Since there is no need to synchronize the timing for the first unit, Room A, the outdoor unit immediately returns a signal to Room A. When the indoor unit in room A receives this signal, it outputs a formal signal to the outdoor unit. From then on, the indoor unit in room A outputs a signal every time it receives a signal from the outdoor unit. When a transmission start signal 91 is received from room B, the outdoor unit does not immediately return the signal, but waits for a period of time 92 to match the transmission and reception from room A. Similarly, in case of room C, leave 93 hours. In this way, it is possible to synchronize the timing of each bit of the signal as shown in Fig. 4, and by combining the receiving boats into the same human-powered boat 39 as shown in Fig. 3, it is possible to read all rooms at the same time. Become. For example, in FIG. 4, the first bit 73 is 1111.

Therefore, the 15.3rd bit 74 is oooo. But 60.
The 7th bit 75 is 0100.2. So it becomes 4. In this way, signal synthesis can be performed immediately each time one bit is read. Since it can be processed as described above, there is no need to take the trouble of looking at each room separately, storing the degree data, and then pulling it out and composing it, so it is practically the same as dealing with only one room. The program can be completed with a load of about 100%. FIG. 9 is a flowchart summarizing the above operations.

As shown in the figure, when the outdoor unit side 101 receives a transmission start signal from the indoor unit side 100, it synchronizes with the other room signal, sends an outdoor signal indicating transmission OK to each indoor unit, and sends a control signal for each indoor unit. is connected to the human-powered boat 3 via the signal line 102 dedicated to each aircraft.
9, the signals are simultaneously received, combined, and the outdoor unit is controlled as shown in FIG.

In the above embodiment, the case of transmitting and receiving signals between the indoor unit and the outdoor unit has been described, but the above technique can also be used for control including a wired remote control when performing centralized control.

〔Effect of the invention〕

As described above, according to the present invention, the load on the control microcomputer of the outdoor unit can be significantly reduced, and one microcomputer can transmit and receive signals to and from a plurality of indoor units and control the outdoor unit. Therefore, the number of microcomputers can be reduced and the device can be assembled at low cost, the software can be simplified, the speed of transmission and reception is fast, and a large amount of information can be transmitted.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the operation of an embodiment of the present invention, FIG. 2 is a block diagram of the entire signal system of the embodiment, and FIG.
The figure is a peripheral block diagram of the outdoor unit control microcomputer of the same example.
FIG. 4 is a time chart of control signals of the same embodiment, FIG. 5 is a time chart of transmission and reception of the same embodiment, FIG. 6 is a circuit diagram of a conventional example, and FIG. 7 is a time chart of signals of the same conventional example.
Figures 8 and 9 are flowcharts showing the operation when the conventional example is used as a multi-system, Figure 10 is a time chart of control signals of the multi-system, and Figure 11 is a time chart of each signal of the multi-system. , FIG. 12 is a block diagram of the entire signal system of the same multi-system, FIG. 13 is a block diagram of another conventional example, and FIG. 14 is a time chart of each signal of the conventional example of FIG. In the figure, 31 is a control microcomputer for the outdoor unit, and 35 to 38 are A-
A transmitting/receiving signal conversion circuit for the indoor unit in room D, 39 is a dedicated port for human power, 100 is a flowchart for the indoor unit, 101 is a flowchart for the outdoor unit, and 102 is a signal line signal. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] In a multi-system air conditioner in which a plurality of indoor units are connected to one outdoor unit, a synchronization means synchronizes the timing at which signals are started to be sent from each indoor unit to the outdoor unit, and the synchronization means 1. A control device for an air conditioner, comprising means for reading signals from each indoor unit sent in synchronization with each other at once.