JPS62187999A - Signal multiplex transmission system for air conditioning equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. 1rTllI Description of the Invention (Field of Industrial Application) The present invention relates to a signal multiplex transmission system in an air conditioner, and more specifically, to an indoor unit, an outdoor unit,
The present invention also relates to a signal multiplex transmission system in an air conditioner in which signals are exchanged between remote control units via signal lines.

<Conventional technology> In order to improve air conditioning capacity and improve usability, the indoor unit, outdoor unit, and remote control unit have been separated from each other, and each unit has been connected with a signal line. There has been provided a system that allows comfortable air conditioning to be performed based on reference data set by a remote control unit.

This type of air conditioner has a switch for switching between cooling and heating.
A run/stop switch, an air volume setting switch, a temperature setting knob, etc. are attached to the remote control device, and by operating the various switches mentioned above, data corresponding to the operating state is sent along with address data through the signal line. By transmitting the data to the indoor unit, holding the transmitted data as a reference value in the indoor unit, and further transmitting the necessary data to the outdoor unit and, if applicable, other indoor units,
The operation of the air conditioner system as a whole can be controlled based on the reference value, and the indoor atmosphere can be maintained in a state that approximates the set conditions.

In the above cases, by using a microcomputer of the same standard (operating with the same program) for transmission control installed in each unit, parts necessary for the entire air conditioner system can be used. In order to prevent the number of types from increasing, the format of the transmission data between each unit, especially the data length, is made the same. However, the meaning of each part of the data is not the same.

<Problems to be Solved by the Invention> In the air conditioner having the above configuration, the required data length is Since the data length will change, the format of the transmission data will be determined based on the data length of the longest data.

The end of data transmission can be detected only when all the data in the preset format has been transmitted, and only then can the transmitted data be analyzed, processed, etc. Become.

Therefore, even if the required data length is short, the necessary analysis, processing, etc. cannot be performed until completely meaningless data has been transmitted, resulting in wasted transmission time and the overall There is a problem that the response time becomes long.

<Object of the invention> This invention was made in view of the above problems,
The object of the present invention is to provide a signal multiplex transmission system in an air conditioner that eliminates unnecessary data transmission, eliminates wasted data transmission time, and shortens the overall response time.

Means for Solving the Problems> In order to achieve the above object, the signal multiplex transmission system of the present invention connects each unit with a signal transmission line, and transmits a transmission signal to each unit. It has a transmission control means for sending and receiving data, and controls the signal transmission between each transmission control means through the signal transmission line by transmitting data length data, address data, and actual data of a length determined based on the data length data. This is done using a data format consisting of .

However, the data may be in units of 4 bits, and the data length data may indicate the number of unit data.

With the above signal multiplex transmission method, in an air conditioner where at least one indoor unit is driven by one outdoor unit and operating standard data is set by a remote control unit, the signal transmission method is effective. When transmitting and receiving signals, data length data, address data, and data based on the data length data are sent from the transmission control means of one unit to the transmission control means of other units through the signal transmission line. Since data consisting of actual data with a length determined by the data length data is transmitted, the transmission control means on the receiving side determines that data reception is complete when the data with the length determined by the data length data is received. be able to.

Furthermore, even when the data is in units of 4 bits and the data length data indicates the number of unit data, the same signal transmission operation as described above can be performed.

<Example> Hereinafter, embodiments will be described in detail with reference to the accompanying drawings showing examples.

FIG. 4 is a schematic diagram showing the system configuration of an air conditioner, which is composed of an indoor control unit I-(11+21), an outdoor control unit (3), and a remote control unit. Controller unit(
3) and the remote control unit (4) respectively exchange data with the indoor control unit (1).

To explain in more detail, each of the above units includes a control section (11) (21) consisting of a microcomputer, etc.
(31) (41), and these control parts (11)
Signal transmission line (22) (
32) (42). Each unit other than the remote control unit (4) is
The data to be transmitted is supplied to the control unit (11), (21), and (31), or the control unit (11N21) (31)
It has a central control unit (13) (23N33) which inputs the data received by and performs necessary control.

Therefore, the operation state control data is transmitted from the control section (41) of the remote control unit (4) to the central control device (13) of the indoor control unit +-+n through the signal transmission line (42) and the control section (11). When the indoor control unit (1) controls the indoor unit (not shown), the control unit (11) and the signal transmission line (
32), O3J: The necessary data is sent to the central control device (33) of the outdoor control unit (3) through the control section (31).
The data is transmitted to the external unit (not shown) so as to ensure the operating state set above, and the necessary data is also transmitted to the central control device (23) of the indoor control unit (2). The information transmitted from the control section (41) of the remote control unit (4) is then controlled to control the indoor unit (not shown) so as to ensure the same operating state as the indoor control unit (11). The operating state control data is transmitted from the indoor control unit (1) to the remote control unit l-[41].

An example of data exchanged between the above units will be described below.

The data transmitted from the remote control unit (4) to the indoor control unit l-(11) includes address data,
These are run/stop instruction data, fan speed instruction data, air volume setting data, and temperature setting data.The actual data is 2 words, and the data as a whole is set to 6 words including the header, data length data, and CRC code. ing.

Conversely, the data transmitted from the indoor control unit (1) to the remote control unit (4) includes address data, abnormality/normality identification data, operation/stop status data, defrosting data, and operation information from the remote control unit (4). / Stop instruction possible state instruction data, set air volume data, set temperature data, or error code data,
The actual data is 2 words, and the entire data consists of the header,
It is set to 6 words, the same as the above data, including data length data and CRC code.

After the start of operation, the above data are transmitted from the indoor control unit (1) to the remote control unit (4), and then from the remote control unit (4) to the indoor control unit (1). I'm trying to get it done. That is, indoor control unit (1)
is the main station.

The data transmitted from the indoor control unit (1) to the indoor control unit (2) includes address data, oil return operation condition satisfaction/failure data, run/stop instruction data, electric valve opening instruction data, and fan drive state instruction data. , drive status instruction data for humidifiers, drain pumps, heaters, etc.
The actual data is 3 words, and the entire data consists of the header,
The data length is set to 7 words including data and CRC code.

Conversely, from indoor control unit (1) to indoor control unit (2)
) is address data, operating status data of various defective parts, normal/abnormal thermistor data, etc. The actual data is 2 words, and the data as a whole includes a header, data length data, and CRC code. 6 including
Word is set.

The data transmitted from the indoor control unit (1) to the outdoor control unit (3) includes address data, defective operation status instruction data, abnormal status data, capacity data, etc. The actual data is 3 words, data The total length is set to 7 words including the header, data length data, and CRC code.

Conversely, from the outdoor control unit (3) to the indoor control unit (1
) is address data, operating status data of various stop sections, abnormal status data, etc. The actual data is 3 words, and the data as a whole includes the header, data length data, and CRC code. It is set to 7 words.

Figure 2 is in the center ffdJt! 111? (13)ldJtl
lnls(11),! 4) It is a schematic diagram explaining data transmission of fffl, which is connected by four data buses (51) and three handshake buses (52).

Between the two, data is transferred in 4-bit units onto a data bus (51), and a handshake bus (52) is transferred between the two.
), data of 4 bits at a time is transmitted sequentially.

In addition, J3 is provided between the control section (11) and any signal transmission line to serially send out data one bit at a time.
I am trying to import data.

Figure 1 shows the data format.
This is data that is an integer multiple of -.

Furthermore, to explain to N11, there is first 4 bits of Herada data (for example, 4 bits of consecutive 1's),
Next, there is data length data and transmission destination address data.
Further, there is actual data of a predetermined word type determined based on the data length data, and finally there is a CRC code (remainder obtained by eliminating all the data above with a generating polynomial).

The data transmission operation in the above air conditioner system is
This will be explained with reference to the flowchart shown in FIG.

After the power is turned on, in step ①, the RAM of the central control tII device, the initial settings of the I10 board, etc., the RAM of the control unit,
Initial settings are made for the I10 boat, etc., and it is determined whether the mode is remote control mode or slave mode in step (3).

If the remote control mode is selected, reception processing is performed in step (3) (However, if this processing is being performed, the remote control unit (4) is switched at a cycle of, for example, 5n5ec).
, in step ■ it is determined whether reception has been performed normally, and if reception has been performed normally, in step ■ necessary signal processing (confirmation of received data and corresponding display (not shown)) (e.g., driving the remote control unit (4)), and transmitting processing is performed in step (2), the remote control unit (4) is switched at a cycle of, for example, 5 m5ec), and then the processing in step (2) is performed again. Let's do it.

If it is determined in step (2) that reception has not been performed normally, the number of occurrences of reception abnormality is counted in step (2), and in step (2), whether or not the count value has reached a predetermined number (for example, 5) is determined. If it has not been reached, repeat the determination and processing from step ① onwards. If it is determined in step ■ that the count value has reached the predetermined number, then step
Perform the following determination and processing.

In addition, if it is determined that the slave mode is selected in step ① above, then in step The specified command is used as a command reception), and it is determined whether the command received in step [phase] is a transmission command or a reception command.

If the reception command has been accepted, reception processing is performed in step ■, and reporting processing is performed in step @ (for example, if normal reception is performed, a confirmation signal is transmitted, and if normal reception is not performed, a confirmation signal is transmitted). (transmits an abnormal signal), and performs the determination and processing from step (2) onwards again.

Furthermore, if it is determined in the above step (■) that the transmission command has been accepted, the transmission process is performed in step (2), the reception process is performed in step (2), and it is determined in step (2) whether or not the reception was performed normally. Discern. Then, if the reception is performed normally, a report process (in this case, a confirmation signal is transmitted) is performed in step @, and the following judgments are made again in step ■.
Process. If it is determined that the reception is not performed normally in step (3) above, the number of occurrences of reception abnormality is determined in step [phase], and the count value is increased to a predetermined number (for example, 5) in step @. ) is reached, and if it has not been reached, step @ and below are determined again, 512! repeat the cry. If it is determined in step @ that the count value has reached a predetermined number, the reporting process in step ① above (in this case, transmitting an abnormal signal) is performed, and the determination in step ① and subsequent steps is performed again. Process.

As is clear from the above description, a reception command is accepted only once, and thereafter, transmission processing, reception processing, and reporting processing are repeated. Therefore, the slave station performs processing based on the received command only the first time, but thereafter repeats the above processing.

Although not explained in detail above, the above transmission process is
In the case of a main station that generates data length data for the actual data to be transmitted, and then generates address data for the destination,
Every time transmission processing is performed, the address data of the slave station is generated in a predetermined order, and in the case of a slave station, the address data of the master station is generated).Finally, the actual data is generated and is formatted in a predetermined format 1-(1). (see Figure 1) and transmits the data in the above order following the header data without indicating the start of the data.

Also, in the above reception process, the header data is received to confirm the beginning of the data, the data length data is then received to confirm the end position of the data, and after that, the data end position is confirmed. The reception operation ends when the data is received until the data is reached.

Therefore, when exchanging data, do not exchange data with different lengths. This allows you to complete the reception operation at this timing and immediately perform the next necessary process.
Responsiveness and followability can be improved simply by preparing control units of the same standard.

<Effects of the Invention> As described above, the present invention simplifies manufacturing management, product inspection, etc. by using control units of the same standard, and also improves the responsiveness and followability of the air conditioner system. The unique effect of being able to Qin.

[Brief explanation of drawings]

Figure 1 is a diagram showing the data format, Figure 2 is a schematic diagram explaining data transmission between the central control unit and the control unit, and Figure 3 is a diagram explaining data transmission of the entire air conditioner system. Flowchart: FIG. 4 is a schematic diagram showing the system configuration of the air conditioner.

Claims (1)

[Claims] 1, at least 1 by 1 outdoor unit In addition to driving the indoor unit of Operated by remote control unit For the air conditioner where the standard data is set and connect signal transmission lines between each of the above units. In addition to being connected by roads, each of the above A transmitter that sends and receives transmission signals to the unit. It has a transmission control means, and the above signal transmission Signals between each transmission control means through the line transmission, data length data, address data data, and based on the data length data above. Consists of real data of a fixed length Characterized by data format Signal multiplex transmission in air conditioners method. 2. Data is in units of 4 bits and the data length data is the unit data. The above claims which indicate the number Signal multiplication in the air conditioner described in paragraph 1 Heavy transmission method.