JPH02168793A - Controller for air harmonizor - Google Patents

Abstract

PURPOSE:To eliminate the error of the transmission/reception of data by returning data received with a reception side to a transmission side as echo data as it is, comparing the echo data returned to the transmission side with an original data being transmitted, and when it is different, re-transmitting the original data again. CONSTITUTION:Data assembled in the form of a transmission signal by the indoor circuit control means 11 of an indoor 10 are serial-signalized by an indoor data transmission means 12 and transmitted to an outdoor device 20. the signal is received by the indoor data reception means 21 of the outdoor device 20, decoded, made into reception data, and sent to an outside circuit control means 23. A data error detection means 22 extracts the echo data out of the data, compares it with the outdoor data previously transmitted from the outdoor device 20 to the indoor device 10, and investigates the presence or absence of errors. When it is decided that the error is present, the data error detection means 22 respectively informs the outdoor circuit control means 23 and transmits the previous data.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to improving a control device for a separate air conditioner, and detects errors in data transmitted and received between an indoor device and an outdoor device, The present invention relates to a control device designed to prevent malfunctions.

[Prior Art] FIG. 8 is a block circuit diagram showing a conventional air conditioner control device disclosed in, for example, Japanese Unexamined Patent Publication No. 59-46439.

In the figure, 50 is an indoor control circuit, 51 is an indoor control section,
52 is a synchronizing signal generation circuit, 53 is a thyristor firing circuit,
54 is a room temperature thermistor, 55 is a transmitting element, 56 is a serial signal line, 57 is a power line, 58 is an outdoor control circuit, 59 is an outside temperature thermistor, 60 is an outdoor control unit, 61 is a synchronizing signal generating circuit, 62 is a receiving element, 80 is a compressor.

From the commercial power supply 70 to the indoor control circuit 50. Outdoor control circuit 58
A power line is connected to the compressor 80. In the indoor control circuit 50, the indoor control section 51 includes a synchronization signal generation circuit 52. Thyristor firing circuit 53. Room temperature thermister 54
are connected, the thyristor firing circuit 53 is connected to a transmitting element 55, and the transmitting element 55 is connected in series to a serial signal line 56. In the outdoor control circuit 58, the outdoor control section 60 includes a synchronization signal generation circuit 61. A receiving element 62, five outside temperature thermistors, and a switch 82 for controlling a combination laser 80 are connected, and the receiving element 62 is connected to the indoor control circuit 50 by a serial signal line 56.

Next, the operation will be explained. When the power supply 70 is turned on, the indoor control section 51 of the indoor control circuit 50 converts and processes the commands for the specified temperature (not shown) and the room temperature input from the room temperature thermistor 54 to create a control serial data signal. The data signal is sent to the thyristor ignition circuit 53, turns on the transmitting element 55, and is sent to the indoor control circuit 50 via the serial signal line 56 to the outdoor control circuit 58, and the data signal enters the receiving element 62. The received control serial data is signal-analyzed by the outdoor control unit 60, and the switch 82
The compressor 80 is turned on/off by controlling.

[Problems to be Solved by the Invention] Since the conventional air conditioner control device is configured as described above, when a data signal for controlling operation is transmitted, it is difficult to prevent unexpected causes such as mixing of noise. However, there is a problem in that this signal is not always received correctly, and the air conditioner is not always operated correctly.

This invention was made in order to solve the problem as described in 1.The purpose of this invention is to obtain a control device for an air conditioner that can always be controlled correctly by detecting and eliminating errors in data transmission and reception. do.

[Means for Solving the Problems] In the air conditioner control device according to the present invention, the receiving side sends the received data back to the sending side as echo data, and the sending side returns the returned echo data to the original sender. Compared with the data, if there is a difference, the original data is sent again. Alternatively, the transmitting side adds a test signal to the data signal to be transmitted and transmits the data signal, and the receiving side uses the test signal to check whether there is an error in the received signal,
If an error is detected, the sender is requested to retransmit, and in that case, the sender sends the original data again.

[Function] In the air conditioner control device according to the present invention, the receiving side sends the received data as echo data back to the transmitting side, and the transmitting side compares the echo data with the original data, so that the transmitted data is transmitted to the receiving side. If the data is not received correctly, the original data is retransmitted.Alternatively, the transmitting side adds a test signal to the data signal to be transmitted and transmits it, and the receiving side When a signal is received, the test signal is used to check whether there is an error in the received signal, and if an error is detected, the transmitter requests retransmission, and in that case, the transmitter transmits the original data again. As a result, errors in data transmission and reception are eliminated, data is always transmitted correctly, and the air conditioner is controlled correctly.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. First, the block circuit diagram shown in FIG. 7 will be explained. The indoor interior W10 is an indoor control microcomputer (indoor microcomputer) 15. Switch input matrix circuit 16. Power supply]7. It consists of an input/output circuit 18, a main relay 19, etc. The outdoor device 20 is an outdoor control microcomputer (
outdoor microcomputer) 25. Power supply 27. Input/output circuit 28. Compressor 80. It consists of an inverter 81 and the like.

Indoor microcomputer 15. The outdoor microcomputer 25 performs data processing,
Controls transmission and reception, etc. Further, the main switch relay 19 of the compressor 80 is controlled by the indoor microcomputer 15. The input/output circuit 18°28 transmits and receives data.

1 to 3 show a control device for an air conditioner according to a first embodiment of the present invention, FIG.
The figure shows an example of the configuration of transmitted and received signals, and FIG. 3 is a configuration diagram of the control device.

The overall configuration of the air conditioner control device (1) according to the first embodiment is as shown in FIG.
Indoor circuit control means 11. Indoor data transmission: means 12.
Outdoor data receiving means 13 and data error detecting means 14
The outdoor device 20 and 1. Then, indoor data receiving means 2
1. It is equipped with a controller detection stage 22, an outdoor circuit control means 23, and an outdoor Y-controller communication means 24.

Next, the data assembled in the form of '1 signal (K' + bow) by the indoor circuit control means 11 of the indoor device 10, the operation of which will be explained with reference to FIG. and transmitted to the outdoor device 20.The signal is received and decoded by the indoor data receiving means 21 of the outdoor device 20 to become received data, and the data is sent to the outdoor circuit control means 23 via the data error detection means 22. If the data sent from the indoor device 0 this time includes echo data, which will be described later, the data error detection means 22 extracts this echo data and sends it to the indoor device from the previous outdoor device 20. The outdoor circuit control means 23 compares the outdoor data transmitted to the outdoor circuit 10 to check for errors.The outdoor circuit control means 23 controls the compressor and the like based on the received data.

In addition to controlling the compressor and the like, the outdoor circuit control means 23 incorporates the indoor data received from the indoor device 10 as echo data together with the outdoor data necessary for operation control obtained outdoors, as shown in FIG. Assemble into the form of a transmitted signal. This echo data and outdoor data are
converted into a serial signal by the outdoor data transmission means 24,
It is transmitted to the indoor device 10. The outdoor data receiving means 13 of the indoor device 10 receives this signal, decodes it, and converts it into data.
This data is sent to the indoor circuit control means 11 via the data error detection means]4. Data error detection means]-4
extracts echo data from this data and compares it with the indoor data previously sent from the indoor device 0 to the outdoor device 20 to check for errors. The indoor circuit control means] uses the sent data to control the indoor fan, etc.

In addition to controlling indoor fans and the like, the indoor circuit control means 11 creates indoor data based on instructed data, data obtained from an indoor temperature sensor, etc., and also directly receives outdoor data previously received from the outdoor device 20. The echo data is assembled together with indoor data into a transmission signal format as shown in FIG. 2, and sent from the indoor data transmitting means 12 to the outdoor device 2
0 as described above, and then repeat the above process.

In the process of -1- above, if the data error detection means 22 or ]4 compares the previous data and the echo data and determines that there is a difference, that is, if it determines that there is an error, the data error detection means 22 or ]4 is
[the outdoor circuit control means 23 or the indoor circuit control means 1], respectively, so that the data to be transmitted is not the new data but the previous data. This is because it is presumed that the previous data was not transmitted and received correctly.

Next, the main operating program of the indoor microcomputer or outdoor microcomputer of the control device according to the first embodiment will be explained using flowchart I shown in FIG. When the program starts, the indoor data to be sent will be sent by inputting the indicated value such as the set temperature, data from the indoor temperature sensor, etc. in the case of an indoor microcomputer, and the data such as the outdoor temperature and operating status will be sent in the case of an outdoor microcomputer. Assemble and store outdoor data to be transmitted (step 30). Next, although not the first time, this transmission data is transmitted together with the echo data from the second time onward (step 31). When the transmission is finished, the transmission waits for the other party to send it.

Step 32) Receive the message sent from the other party.
. As shown in FIG. 2, the received and transmitted data consists of original data created by sampling, calculation, etc. on the transmitting side and echo data. Echo data is received data that is sent from the sender and received by the receiver and is sent back to the sender as is. The original data and echo data can be separated on the receiving side by adding an identification code, etc. Next, in step 32, the received data is separated from the echo data of the data sent from this side and the original data of the other party. (Step 33). Next, compare the separated echo data with the original data sent from us last time,
Step 34). If they are equal, it is determined that the previously transmitted data was correctly received by the other party, and the next transmission (?, child data is updated (step 35).
).

If there is a difference, it is determined that the data was received by the other party in error, and the next transmission data is made the same as the previous one (step 36). As a result, if the other party receives the data in error, the data will be retransmitted and the error will be corrected. Next to step 35 or step 36, the data from the other party separated in step 33 is used as echo data (step 37). Next, the next original transmission data from step 35 or step 36 and the echo data from step 37 are used to assemble and store the return transmission data (step 30
), then repeat the above steps.

In addition, in the first embodiment, after checking the comparison between the previous original data and the echo data, if the data was sent correctly, the next original transmission data is sent. Since the transmitted data is not always continuous, in that case, return to the start of the program.

Through the following operations of the indoor microcomputer and outdoor microcomputer, the original data is transmitted and received between the indoor device and the outdoor device, as well as echo data. Since the data is checked and compared with the data of become.

4 to 6 show a control device for an air conditioner according to the second embodiment, FIG. 4 is a flowchart of an operation program of a microcomputer of an indoor device or an outdoor device, and FIG. 5 shows an example of the configuration of transmitted and received data. 6 are configuration diagrams of the control device.

The overall configuration of the air conditioner control device according to the second embodiment is as follows:
As shown in FIG. 6, indoor circuit control means 11. Indoor data transmitting means 12, outdoor data receiving means 13. Received data error detection means 141. The outdoor device 20 includes an outdoor data retransmission requesting means 122 and an indoor data retransmission means 123, and the indoor data receiving means 21.
Received data error detection means 22], outdoor circuit control means 2
3. Outdoor data transmission means 24. Outdoor data retransmission means 24
2 and indoor data retransmission request means 243.

Next, the operation will be explained with reference to FIG. Indoor equipment 1-0
from the indoor circuit control means 11 to the indoor data transmission means 12.
Indoor data is sent to the outdoor device 20 via. At that time, as shown in Fig. 5, the room data is converted into digital serial signals, and the check pit and
That is, parity bits 1 to 1 are added. Parity pick 1~ is the signal that includes parity pick 1~.
A pit of 0" or "1" is added so that o" or "]" becomes an odd or even number.

The signal with parity pinny sent from the indoor device 10 is received by the indoor data receiving means 21 of the outdoor exterior R20, and the received data error detecting means 221 performs an odd or even parity check, and if correct, the signal is sent to the outdoor circuit control means. 23, and the compressor etc. are controlled based on this data.

If the received data error detection means 221 performs a parity check and detects an error, the indoor data retransmission request means 2
43 and sends an indoor data retransmission request signal to the indoor device 10. When the outdoor data receiving means 13 of the indoor device 10 receives this, it sends it to the indoor data retransmitting means 123, and retransmits the original indoor data sent last time to the outdoor device 20.

Hereafter, the above steps are repeated 5. When transmitting outdoor data from the outdoor device 20 to the indoor device 10, in exactly the same way as above, the transmitting side adds a parity pit to the data signal to be transmitted and transmits it, and the receiving side A parity check is performed, and if an error is detected, the sending side is requested to retransmit, in which case the sending side will retransmit the original data.

Next, the main operating programs of the indoor microcomputer 15 or the outdoor microcomputer 25 according to the second embodiment will be explained using flowchart I. shown in FIG.

In FIG. 4, the program starts). Then, for example, the indoor microcomputer adds parity bits 1 to 1 to the data signal to be transmitted and transmits it. The outdoor device receives this (
Step 40), the outdoor microcomputer performs a parity check on the received data (Step 41), and determines whether the received data signal is correct (Step 42). checks whether it is a retransmission request (step 44), and if it is not a retransmission request, it adds a parity value to the new data and transmits it (step 46). If it is determined in step 44 that it is a retransmission request, the same data sent last time is sent with parity and soto added (step 45). If the result of the parity check in step 42 is an error, this means that the data was not transmitted correctly due to incorrect transmission or reception, or noise was mixed in, so a retransmission request signal is sent ( Step 43). The receiving side should not receive any of the above transmitted signals.Step 4
0), repeat the above steps.

FIG. 5 shows an example of the structure of signals to be transmitted and received. The transmission data in this example is asynchronous serial data, and 1
It consists of a total of 10 bits: a start bit that is always "o", a 7-bit data bit I, a 1-bit barity bit, and a stop bit that is always "1".Method for determining the parity bit If there is an even number of parity bits among the seven data bits, the parity bit is set to "o", and if it is an odd number, the parity bit is set to "1".
The number of "1" bits is made to be an even number among the 8 bits including the parity bit I-.

For example, the parity check when receiving data is
If the number of 1'' bits among these 8 bits is an even number, it is determined to be correct, and if it is an odd number, it is determined that there is an error.

In this embodiment, the bit length of the data to be transmitted is 8 bits including the parity bit, but the length may be any length, as long as the parity bit is added.

Also, as a parity check method, we checked whether the number of “1” pins in the pin 1 is an even number, but now we can check whether it is an odd number. You may decide on a parity pit. Alternatively, the number of "0" bits may be determined to be an even number or an odd number and this may be checked. Alternatively, the transmitting side may add another test signal and transmitting it, and the receiving side may use this to detect errors.

As described above, in the second embodiment, the transmitting side adds parity pits to the data signal to be transmitted and transmits the data signal, and the receiving side performs a parity check and requests retransmission if an error is detected. Since the sending side retransmits data, errors in data transmission are eliminated.

[Effects of the Invention] As described above, according to the present invention, returning echo data,
Alternatively, by adding and transmitting a test signal,
By checking the transmitted and received data and retransmitting the previous data if it is incorrect, a highly reliable control device that can transmit and receive data between indoor and outdoor devices without errors can be created. There are benefits to be gained.

[Brief explanation of the drawing]

1 to 7 show a control device for an air conditioner according to an embodiment of the present invention, and FIG. 1 shows flowcharts 1 to 7 of an operation program of a microcomputer in the control device according to the first embodiment.
FIG. 2 is a diagram showing an example of the structure of the transmitted and received signals according to the first embodiment, FIG. 3 is an overall configuration diagram of the control device according to the first embodiment, and FIG. 4 is the operation of the microcomputer in the control device according to the second embodiment. Flow chart of the program) ~, Figure 5 is a diagram showing an example of the configuration of transmitting and receiving signals according to the second embodiment, Figure 6 is an overall configuration diagram of the control device according to the second embodiment, and Figure 7 is a block circuit of the control device. It is a diagram. FIG. 8 is a block circuit diagram of a conventional control device. In the figure, 10 is an indoor device and 20 is an outdoor device. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In an air conditioner control device configured to control operation by transmitting and receiving data between an indoor device and an outdoor device, the receiving side sends the received data back to the transmitting side as echo data, A control device for an air conditioner, characterized in that a transmitting side compares the returned echo data with the original transmitted data, and if they are different, transmits the original data again. (2) In an air conditioner control device that is configured to control operation by transmitting and receiving data between an indoor device and an outdoor device, the transmitting side adds a test signal to the data signal to be transmitted. The receiving side uses the test signal to check whether there is an error in the received signal, and if an error is detected, requests the transmitting side to retransmit, in which case the transmitting side transmits the original data again. A control device for an air conditioner, characterized in that: