JPH0225656A - Control device for air conditioner - Google Patents

Abstract

PURPOSE:To prevent a complete stop due to errors in the signal transmission and reception by temporarily interrupting and resetting the power source when there is a runaway due to noise or an inability to transmit and receive the signal for more than a predetermined time interval, and resuming the operation or the air conditioner after reading the required data from a memory means. CONSTITUTION:When it is so determined that the data transmitted over the wire 4 is modified or destroyed due to the electromagnetic wave or higher harmonic noise superposed on it, and no effective data can be received, the pulse output is ceased, and the power source circuit 11 is interrupted by activating a runaway sensing circuit 10 in order to stop the power supply. At this time, the data required for operating the air conditioner, for example, before the power source circuit 11 was interrupted is stored in the external memory 9. Once the microcomputer 6 on the outdoor unit side 3 is reset, the power source circuit 11 is restarted to cause the respective controllers to be reset for the power on status. At the same time, the microcomputer 6 reads the initial data stored in the external memory 9 and sends out the same to the unit controllers for the remote controller 1 and indoor unit 2 so as to resume the operation of the air conditioner.

Description

[Detailed description of the invention] [Industrial use distribution]

The present invention relates to a control device for an air conditioner, and more particularly to a control device for an air conditioner that can transmit power and control data for a unit controller I/roller in a superimposed manner on a transmission line.

[Conventional technology]

Conventionally, an air conditioner control device that transmits the power supply and control data of each unit controller in a superimposed manner on a transmission line instead of using a remote controller is known, for example, from Japanese Patent Laid-Open No. 62-261844. ing. This cover device is for each unit controller!・The roller starts transmitting and receiving as necessary, and if the transmitting and receiving cannot be completed, it is assumed that there is a transmitting/receiving error and the air conditioner is put into inspection mode and completely stopped.

[Problem to be solved by the invention]

Conventional air conditioner control devices are controlled in the manner described above, so in rooms with noise sources such as high-frequency welders or medical equipment, transmission/reception errors may occur if the noise enters the transmission line. However, there was a problem in that the air conditioner stopped completely and could not fully demonstrate its air conditioning function. This invention was made to solve these problems, and it provides an air conditioner control device that can perform the air conditioning function without stopping the air conditioner even in a room with a noise source. The goal is to get something.

[Means to solve the problem]

The air conditioner control device according to the present invention is an air conditioner that enables data transmission and reception between a remote controller, indoor unit, and outdoor unit unit controllers via a transmission line that also serves as a power supply for these units. When the unit controller (having the power supply)/roller continues to be unable to transmit/receive for a predetermined period of time due to runaway or noise intrusion from other unit controllers, necessary data is stored in the storage means. control means that controls the power supply to be cut off once after storing the data, and automatically restarts the operation of the air conditioner based on the data stored in the storage means when the power supply is turned on again. be.

[For production]

In this invention, when the control means recognizes that the control of each unit has continued for a predetermined period of time, it temporarily cuts off the power to each unit control, and then turns on the power again to connect the outdoor unit, the indoor unit, and the At the same time as power-on resetting the remote controller, data necessary for operation of the air conditioner is read from the storage means, and operation of the air conditioner is restarted based on this data. Therefore, according to the present invention, it is possible to prevent the air conditioner from completely stopping due to a transmission/reception error.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a configuration diagram showing an example of an air conditioner according to the present invention. In the figure, 1 is a remote controller indoor unit, 3 is an outdoor unit, and between these remote controller I/roller 1, indoor unit 2, and outdoor unit 3 is an f4 source superimposed 2I! Expression transmission! Connected by $4. A modulated wave for transmitting and receiving control data and a DC current are superimposed on the transmission line 4 . FIG. 2 is a diagram of the unit controller of the outdoor unit in this embodiment. The unit controller is a microcomputer 6 that controls outdoor equipment such as an outdoor fan, a transmitting/receiving device, and other outdoor units as a whole; A transmitting/receiving circuit 8 is connected to the transmission line 4 and transmits and receives command data and control data to and from a remote controller (not shown) through a terminal board 7, and a transmitting/receiving circuit 8 is connected to the microcomputer 6 and transmits data necessary for controlling the outdoor unit 3. Runaway detection is connected to the external memory 9 that is written periodically and to the microcomputer 6, and detects the presence or absence of pulses that are periodically output from the middle of a series of processing steps of the microcomputer 6 to determine if the microcomputer 6 has run out of control. circuit 10;
The runaway detection circuit 10 includes a power supply circuit 11 which is cut off by a signal output when the microcomputer 6 detects runaway, and the power from the power supply circuit 11 is supplied to a low-pass filter 12 and a terminal board 7 . It is configured to be supplied to the unit controller 1 to the roller of the remote controller internal unit 2 through the transmission line 4. Next, the operation of this embodiment configured as described above will be explained. When the power is turned on, each unit I, controller I, and roller of the remote controller indoor unit 2 and outdoor unit 3 are power-on reset, and the microcomputer 6 of the outdoor unit 3 reads initial data from the external memory 9. It is transmitted from the transmitting/receiving circuit 8 to each unit, controller, and roll of the indoor unit 2, etc., as necessary. Here, the remote controller and each unit controller of the outdoor unit 3 execute the process shown in FIG. 3 at regular time intervals, confirm that there is no reception input, and then transmit. For example, in the case of the outdoor unit 3, when transmitting its changing state due to changes in the rotational speed of the compressor or outdoor fan, etc., and accompanying command data, etc. to the remote controller, the steps shown in Fig. 3 are performed. S
1, it is determined whether there is a transmission request of its own by referring to the transmission flag. Here, if there is no own transmission request, the process proceeds to the exit, and if it is determined that there is a own transmission request, the process moves to step S2 to read the own reception input terminal, and in the next step S3, the process proceeds to the exit. Determine if there is any received input including. When it is determined that there is a reception input, the process proceeds to the exit, and when it is determined that there is no reception input, the process moves to step S4 and starts transmission. That is, outdoor a13
This also applies to the unit controller of the remote controller. FIG. 4 shows a flowchart 1 of the runaway detection operation due to the intrusion of noise, which is executed by the unit controller of the outdoor unit 3. When the data received by the unit controller remote controller circuit 8 of the outdoor unit i3 is taken into the microcomputer 6, first, in step 310, it is determined whether valid data that is not affected by noise is received. If valid data has been received, the process proceeds to step 311, where the microcomputer 6 sets a built-in timer and counts the processing time of the microcomputer 6 after receiving the valid data. Then, in the next step 312, it is determined whether the timer has timed up, and if "NO", it is determined that the microcomputer 6 is operating normally and the process proceeds to the exit. Further, if the processing is not completed within a predetermined time set by the timer, it is determined that the microcomputer is out of control and in a closed loop state, and the pulse output is stopped in the next step S14. Detecting this, the runaway detection circuit 10 shuts off the power supply circuit 11 and each unit controller determines that no valid data is received, that is, the data transmitted on the transmission R4 is affected by electromagnetic waves generated from medical equipment and welders. , When it is determined that valid data cannot be received due to harmonic noise being superimposed and the data being altered or destroyed, the process proceeds to step S13, and a built-in timer is set to check whether the inability to transmit or receive has continued for a predetermined period of time. Determine. Here, if the transmission/reception is disabled for a predetermined period of time, it is determined that valid data cannot be received due to noise being mixed into the data sent to the outdoor unit 3 or the remote controller microcomputer on the sending side going out of control. Proceeding to step 314, the pulse output is stopped and the runaway detection circuit 10 is operated to cut off the power supply circuit 11. When each unit controller power supply circuit 11 is cut off, data necessary for air conditioning function operation, e.g. Air conditioner operating data before the power supply circuit 11 is shut off is stored in the external memory 9. Then, by cutting off the power, the microcomputer 6 on the outdoor ALA side
When B is reset, the power supply circuit 11 is turned on again, so the microcomputer 6 of each unit controller external unit 3 reads out the initial data stored in the external memory 9, and transfers the data of B to the remote controller as necessary. The operation of the air conditioner is restarted based on each unit controller data of the internal unit 2. Therefore, in this embodiment, it is possible to prevent the air conditioner in a room where equipment that generates electromagnetic waves and harmonic noise such as medical equipment is installed from being completely stopped due to a transmission/reception error, and to perform the air conditioning function. . In the above embodiment, the case where the power source is provided in the outdoor unit 3 has been described, but it goes without saying that the power source may be provided in the indoor unit.

【Effect of the invention】

As described above, according to the present invention, the remote control
In an air conditioner connected to Larolla, if the rollers run out of control due to noise or continuous high-frequency noise enters the transmission line and transmission/reception is not possible for a specified period of time, the power supply for each unit controller is temporarily shut off. When the power supply side unit ID controller goes down due to this, the power is restored and power is automatically turned on to each unit/controller. At the same time, the air conditioner is operated based on the data stored in the storage means. Since the system restarts automatically, the air conditioner in the room where the noise source is located does not have to stop completely due to a transmission/reception error, and is therefore able to perform its air conditioning function.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of an air conditioner according to an embodiment of the present invention, FIG. 2 is a lock diagram of the outdoor unit side unit controller of the air conditioner control device according to this embodiment, and FIG. 3 is a diagram showing each unit in this embodiment. FIG. 4 is a flowchart 1 for explaining the runaway detection operation in this embodiment. 1 ・Remote controller outdoor unit, 4...transmission line, 6 microcomputer,
8 ・Transmission/reception circuit, 9 External memory (storage means) 10
... Runaway detection circuit, 11 power supply circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] An air conditioner that connects a remote controller, an outdoor unit, and each unit controller of the outdoor unit by a transmission line that also serves as a power supply, and performs air conditioning by transmitting and receiving data at predetermined time intervals between the unit controllers. In the control device, either the indoor unit or the outdoor unit is provided with a power supply, and the unit controller having the power supply has a storage means for storing data necessary for operating the air conditioner, and the unit controller having the power supply has a storage means for storing data necessary for operating the air conditioner. When transmission/reception continues for a predetermined period of time due to runaway or noise intrusion with other unit controllers, after storing the necessary data in the storage means, the power supply is controlled to be cut off, and when the power is turned on again, each unit controller and control means for power-on resetting the air conditioner and automatically restarting operation of the air conditioner based on data stored in the storage means.