Communication system for air conditioner

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to a device (for example, an air conditioner) that operates using a remote controller.

【0002】

[Conventional technology]

When transmitting and receiving with a conventional air conditioner communication system, first, transmission data is transmitted from the transmitter. While receiving the transmission signal, the reception sensitivity of the receiver was adjusted to an appropriate level by the AGC circuit.

【0003】

[Problems to be Solved by the Invention]

However, in the above-mentioned conventional method, since the reception sensitivity of the receiver is adjusted after the start of data reception, the reception sensitivity is not at an appropriate level at the start of data reception. Therefore, there is a problem that data reception fails.

【0004】

[Means for solving problems]

Therefore, the present invention is composed of a first communication unit, a first control unit that controls the first communication unit, a second communication unit, and a second control unit that controls the second communication unit. In a system in which the first communication unit and the second communication unit perform bidirectional or one-way communication, an AGC circuit is built in the communication unit on the receiver side, and a dummy is used before data transmission from the communication unit on the transmitter side. It is characterized by transmitting a signal.

【0005】

As a result, the reception sensitivity on the receiver side can be adjusted to an appropriate level during the reception of the dummy signal, so that it is possible to prevent data reception from failing.

【0006】

Further, in a system in which a plurality of data are transmitted at the same time, a blank signal between the data is transmitted as a dummy signal before data transmission. As a result, when a dummy signal is received, it is determined to be a blank signal, and the data reception waiting state is immediately entered, so that reliable data reception is possible.

【0007】

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the communication system of the air conditioner according to the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a configuration diagram of an indoor unit of an air conditioner and a remote controller. As shown in FIG. 1, the indoor unit of the air conditioner is composed of the communication unit 1 and the control unit 2, and the remote controller is composed of the communication unit 3 and the control unit 4.

【0008】

The operation of the communication system of the air conditioner according to the first embodiment according to the above configuration will be described.

【0009】

In a system in which a communication unit and a control unit for controlling the communication unit are provided in the indoor unit and the remote controller of the air conditioner, respectively, and the indoor unit and the remote controller perform bidirectional or one-way communication, before data transmission from the communication unit on the transmitter side. A dummy signal is transmitted to the receiver, and the reception sensitivity on the receiver side is set to an appropriate level by the dummy signal. Therefore, when the data signal is received, the reception sensitivity of the receiver is at an appropriate level, so that reception failure can be avoided. (Embodiment 2) In the second embodiment, in a system in which a plurality of data are simultaneously transmitted, a blank signal between the data is transmitted as a dummy signal before data transmission.

【0010】

FIG. 2 is a data structure diagram transmitted from the transmitter. There is a blank signal between data 1 and data 2, and the blank signal is transmitted as a dummy signal before data transmission. On the receiver side, the reception sensitivity on the receiver side is set to an appropriate level by receiving the dummy signal, and when the dummy signal is received, it is judged as a blank signal, and the header signal reception wait, that is, the data signal reception wait state is immediately entered. , Reliable data reception is possible.

【0011】

[Effect of the invention]

As described above, in the communication system of the air conditioner of the present invention, a dummy signal is transmitted from the communication unit on the transmitter side before data transmission, and the reception sensitivity on the receiver side is set to an appropriate level by the dummy signal. Therefore, reception failure can be avoided.

【0012】

Further, in a system in which a plurality of data are transmitted at the same time, by transmitting a blank signal between the data as a dummy signal before data transmission, when the dummy signal is received, it is determined as a blank signal and immediately waits for data reception. Since it is in a state, reliable data reception is possible.

[Simple explanation of drawings]

[Figure 1]

Configuration diagram of the indoor unit and remote controller of the air conditioner according to the embodiment of the present invention. [Figure 2]

Same transmission data configuration diagram [Explanation of symbols]

A Indoor unit of air conditioner B remote control 1 Communication unit 2 Control unit 3 Communication section 4 Control unit