JP2002277030A - Remote controller of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote controller of an air conditioner capable of effecting communication without causing influence on operation control of a refrigeration system between an indoor unit and an outdoor unit. SOLUTION: A CPU 10 of the remote controller 1 counts, by a message counting means 14, messages detected by a message detecting means 13 within a specified time set by a message monitoring timer 15. When the number of the messages reaches a specified number or larger, a load resistor is inserted in a transmission line to regulate communication waveform on the transmission line so that communication can be effected without causing influence on the operation of the refrigeration system between the outdoor unit and the indoor unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device for remotely controlling an air conditioner that performs transmission and reception with a plurality of indoor units and outdoor units.

[0002]

2. Description of the Related Art In recent years, there has been proposed an air conditioner in which a plurality of indoor units and outdoor units are operated and controlled by communication and operated by a remote control device (for example, Japanese Patent Application Laid-Open No. Hei 7-6658). ).

Hereinafter, the above-described conventional air conditioner will be described with reference to the drawings. FIG. 3 shows a block diagram of the conventional air conditioner.

In FIG. 3, reference numeral 1 denotes a remote controller for transmitting an operation command to a plurality of indoor units 3 and outdoor units 4 through a transmission line 2, and includes a CPU 10, a transmitting / receiving unit 11, and an address setting unit 12.

[0005] The indoor unit 3 and the outdoor unit 4 have a CPU 30, CPU 40,
1 and 41 and address setting means 32 and 42 are provided.

Here, the CPU 30 and the CPU 40 control the refrigeration system based on a predetermined program. Further, by distinguishing the devices on the transmission path 2 by the address setting means 32, 42, the remote control device 1
The operation is controlled by an operation command transmitted from the transmission line 2 through the transmission line 2.

Next, the operation of the above-described conventional air conditioner configured as described above will be described.

First, the CPU 30 of the indoor unit 3 receives the operation command from the remote control device 1 as valid, and starts operation control of the indoor unit 3 according to the command. Then, the CPU 30 of the indoor unit 3 transmits the operation state signal to the outdoor unit 4 via the same transmission path 2.

At this time, the remote control device 1 generates transmission request data in order for the CPU 10 provided therein to capture the operation state data of the indoor unit 3 and the outdoor unit 4,
The data is programmed to be transmitted to the CPU 30 of the indoor unit 3 and the CPU 40 of the outdoor unit 4 via the transmission circuit 11 and the transmission path 2. On the other hand, indoor unit 3, outdoor unit 4
Have different address settings made by the address setting means 32 and 42, respectively. After the transmission request data from the remote control device 1 is received by the transmission / reception means 31 and 41, they are taken in via the CPUs 30 and 40. The indoor CPU 30 and the outdoor CPU 40 that have received the transmission request data create the requested data and transmit it to the remote control device 1 by the transmission / reception units 31 and 41.

[0010]

However, in the above-described conventional remote control device for an air conditioner, when the number of connected devices on the transmission path is large or when the distance of the transmission path is long, the environment is susceptible to external noise. When the communication quality of the transmission line is relatively poor, the communication state of the transmission line 2 is in a transient state on the refrigeration system, and communication data is frequently exchanged between the indoor unit 3 and the outdoor unit 4. When the outdoor unit 3 is in a state of
When communication is frequently performed between the communication unit and the outdoor unit 4, communication errors occur frequently due to poor communication quality, and data required for controlling the device cannot be immediately transmitted. Communication data becomes invalid or required communication data is delayed.

At this time, the operation control of the refrigeration system between the indoor unit 3 and the outdoor unit 4 becomes unstable, and in some cases, a fault such as a communication abnormality or a pressure abnormality occurs.

When the number of indoor units 3 and outdoor units 4 connected on the transmission line 2 increases, the amount of communication on the transmission line increases, and the frequency of occurrence of communication abnormalities increases. Control becomes particularly unstable.

The present invention has been made in consideration of the above problems, and has been made in consideration of the above-described problem, and thus, an air conditioner that performs communication without affecting communication control of a refrigeration system between an indoor unit and an outdoor unit by reducing communication abnormalities due to waveform disturbance due to external noise. It is an object of the present invention to provide a remote control device.

[0014]

In order to achieve the above object, a remote control device for an air conditioner according to the present invention comprises a communication device for transmitting data on a transmission line between an indoor unit and an outdoor unit, which is measured during a predetermined period of time. According to the number of communication messages of the signal, a load resistance is inserted on the transmission path to adjust the signal waveform. Accordingly, communication between the indoor unit and the outdoor unit can be performed without affecting the operation control of the refrigeration system between the indoor unit and the outdoor unit.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A remote control device for an air conditioner according to the present invention comprises transmitting / receiving means for transmitting / receiving communication signals from a plurality of indoor units and outdoor units connected on the same transmission line, and the transmitting / receiving means. A message detection unit that detects a communication abnormality of the received communication signal, a message counting unit that measures the number of messages from the message detection unit, a message monitoring timer that monitors a message measurement time of the message counting unit, A plurality of load resistors for adjusting the waveform of the communication signal; a load resistor switching unit for switching the number of insertions of the load resistors;
C which is connected to the message monitoring timer and the load resistance switching means and performs transmission and reception between the indoor unit and the outdoor unit
A load resistance is inserted on the transmission line according to the number of communication messages of the communication signal on the transmission line measured by the message counting means during a certain time set in the message monitoring timer. By adjusting the signal waveform according to the quality of the communication state and reducing the resistance value and impedance of the transmission line, the noise signal is eliminated, and the rising and falling waveforms of the communication signal are adjusted. This has the effect of maintaining good communication quality and not affecting the operation control of the refrigeration system between the outdoor unit and the indoor unit.

Next, an embodiment of a remote control device for an air conditioner according to the present invention will be described with reference to the drawings. The same components as those of the related art are denoted by the same reference numerals, and detailed description thereof will be omitted.

(Embodiment 1) The same components as those of the prior art are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 is a block diagram of an air conditioner adapted to one embodiment of a remote control device for an air conditioner of the present invention.

In FIG. 1, 11 is a transmitting / receiving means, 12 is an address setting means for transmitting / receiving, 13 is a message detecting means for detecting a communication message on the transmission line 2, and 14 is a message detecting means 11
Is a message counting means for counting the number of messages of the message detected in step (1). Reference numeral 15 denotes a telegram monitoring timer for measuring the time measured by the telegram counting unit 14, reference numeral 16 denotes a load resistance switching unit, and reference numerals 17 and 18 denote load resistances. 10 is transmitting means 1
1, a CPU connected to the address setting means 12, the message detection means 13, the message counting means 14, the message monitoring timer 15, and the load resistance switching means 16 for controlling the load resistance switching means 16.

Next, the operation of the air conditioner remote control device according to the present embodiment having the above-described configuration will be described.

FIG. 2 is a flowchart showing the operation of the air conditioner remote control device of the embodiment.

First, the CPU 10 of the remote control device 1
Resets the time of the message monitoring timer 15 and sets the timer time from 0. After the power is turned on, the remote control device 1 controls the load resistance
In a state in which 7 and 18 are not inserted, the data request time to the indoor unit 3 and the outdoor unit 4 and the message measurement time are set. In this case, the abnormal message measurement time is one minute. The initial value of the data request time is measured by measuring for one minute after the power is turned on (STEP 1).

The remote control device 1 transmits a data request command to the indoor unit 2 and the outdoor unit 3. On the other hand, the CPUs 30 and 40 of the indoor unit 3 and the outdoor unit 4 receiving the transmission request signal by the transmission / reception means 31 and 41 transmit transmission data requested by the remote control device 1 from the transmission / reception means 31 and 41 to the remote control device. 1 (STEP 2).

In FIG. 3, the remote control device 1 issues a transmission request to the outdoor unit and the indoor unit at a data request transmission time interval. Thereby, the indoor unit 3 and the outdoor unit 4 perform data transmission. Data consists of data frames, one data is 8
A parity bit PA in which the total number of bit data, data bits, and parity bits is an even number is added. In the first embodiment, a case where the sum of the data bits and the parity bits is not an even number is regarded as an abnormal message.

Next, the remote control device 1 receives the communication data on the transmission line 2 by the transmission / reception means 11 of the remote control device, and the message received by the transmission / reception means 11 is counted by the message detection means by the message counting means 14. Add one number. At this time, the CPU 10 of the remote control device 1 reads the message count number from the message counting means 14 and the time of the message monitoring timer 15 (STEP 3).

The CPU 10 checks from the message monitoring timer 15 whether the measurement time has passed a predetermined time (the initial value is 1 second). If not, STEP 4 in FIG.
Go to NO side. When the count value of the message monitoring timer 15 has reached the message measurement time, the YE of STEP4 in FIG.
Go to S side (STEP 4).

In FIG. 2, when the operation goes to the YES side in STEP 4, the CPU 10 of the remote control device 1 resets the count value of the message monitoring timer 15 to 0, and counts the time of the message monitoring timer from 0. In addition, the message count number is read from the message counting means 14. The message counting means 14 is reset to count from 1 (STEP 5).

When the CPU 10 of the remote control device 1 is in the data request time initial value setting state after the power is turned on, the CPU 10 of FIG.
Go to the YES side of EP6, and set it to the time of the value shown in the table of the number of transmission messages-data request time (FIG. 3).

[0028]

[Table 1]

In Table 1, when the abnormal message count is 180 or more, load resistors 1 and 2 are inserted.
For 9 messages, 1 load resistance is inserted, and for 100 or less, no insertion is made (STEP 6).

Thereafter, this operation is repeated.

As described above, the remote control device 1 for an air conditioner of the present invention is a transmitting / receiving means for transmitting / receiving communication signals from a plurality of indoor units 3 and outdoor units 4 connected on the same transmission line 2. 11, a message detection unit 13 for detecting a communication message of a communication message on the transmission path 2 received by the transmission / reception unit 11, a message counting unit 15 for counting the number of messages from the message detection unit 13, and a reception message counting unit 14. Message monitoring timer 15 for measuring the measurement time, and load resistance switching means 1
6, load resistors 17 and 18, transmitting and receiving means, address setting means 12, message detecting means 13, message counting means 14,
It comprises a CPU 10 for controlling transmission and reception between the indoor unit 3 and the outdoor unit 4 connected to the message monitoring timer 15 and the load resistance switching means 16, and the CPU 10 operates for a predetermined time set in the message monitoring timer 15. Message counting means 1
4, load resistors 16 and 17 are inserted into the transmission line 2 according to the number of communication messages of the communication signal on the transmission line 2 from the indoor unit 3 and the outdoor unit 4 so that the transmission line 2 In order to make the communication state good, the outdoor unit 4 and the indoor unit 3
Communication can be performed without affecting the operation control of the refrigeration system during the operation.

[0032]

As described above, the remote control device for an air conditioner of the present invention is capable of transmitting a communication message of a communication signal on a transmission line from an indoor unit or an outdoor unit measured during a predetermined period of time. Depending on the number of messages, load resistance can be inserted on the transmission line to maintain good communication status on the transmission line at all times, and communication can be performed without affecting the operation control of the refrigeration system between the outdoor unit and the indoor unit. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram of an air conditioner to which an embodiment of a remote control device for an air conditioner of the present invention is applied.

FIG. 2 is a flowchart showing the operation of the air conditioner remote control device of the embodiment.

FIG. 3 is a pattern diagram of the embodiment.

FIG. 4 is a block diagram of a conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Remote control device 2 Transmission line 3 Indoor unit 4 Outdoor unit 11 Transmission / reception means 12 Address setting means 13 Message detection means 14 Message count means 15 Message monitoring timer 16 Load resistance switching means 17 Load resistance 1 18 Load resistance 2 10 CPU

Claims (1)

[Claims] 1. A transmission / reception means for transmitting / receiving communication signals from a plurality of indoor units and an outdoor unit connected on the same transmission path, a message detection means for detecting a communication signal received by the transmission / reception means on the transmission path, A message counting means for measuring a message signal from the message detecting means, a message monitoring timer for measuring a count time of the number of messages, a plurality of load resistors for adjusting a waveform of a communication signal on a transmission line, and insertion of the load resistor And a CPU connected to the transmission / reception means, the message detection means, the message counting means, the load switching means, and the message monitoring timer, wherein the CPU is connected to the message detection means. The telegram counting means measures the telegram detected by the telegram, and counts the counted number for a predetermined period of time counted by the telegram monitoring timer. A remote control device for an air conditioner, wherein a load resistance is inserted on a transmission line by the load resistance switching means when the number of words has reached the number.