Two-wire power supply communication circuit of air conditioner controllers

Abstract

The invention discloses a two-wire power supply communication circuit of air conditioner controllers, which comprises a first communication circuit connected with a mainboard controller and a second communication circuit connected with a wire controller, wherein the first and second communication circuits are connected through a communication interface; communication signals and power signals between the first and second communication circuits share a connecting wire; direct current power supply is rectified and filtered through a capacitor and connected in series with an inductor, supplies power to the first communication circuit and is connected to the communication interface; and the communication interface enables the power signals and the communication signals from the first communication circuit to pass through a polarity conversion switch, is connected in series with a diode and filtered by the capacitor and then is subjected to voltage reduction by a resistor to supply the power to the second communication circuit. The two-wire power supply communication circuit does not have high requirement on communication wires so that only ordinary electric wires can be used for the two-wire power supply communication circuit, is simple to mount, has no difference in polarity, does not cause the condition of mounting error and is applied to various conditioner controllers.

Description

technical field [0001] The invention relates to an air conditioner controller, in particular to a two-wire power supply communication circuit of the air conditioner controller. Background technique [0002] The existing air conditioner controllers are divided into two types: one is the remote control type, which includes an infrared remote controller and a main board controller installed on the air conditioner body. The operation command completes the specific control; the other is the wire control type, including the wire controller and the main board controller installed on the air conditioner body. The display is completed by the wire controller. The main board controller provides power for the wire controller through the connection line, and at the same time realizes two-way communication with the wire controller through the connection line, sends information such as status and temperature to the wire controller, and receives the wire controller. Incoming operation comm...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that the existing air conditioner controller needs to be wired and debugged for the controller and the wire controller during installation, failure and loss will be caused by improper selection of wires or wrong wiring, the applicant has carried out improvement research and provided an air conditioner control The two-wire power supply communication circuit of the device is not only easy to install, there is no polarity, and there will be no installation errors, and the requirements for communication wires are not high.

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