Current loop communication circuit and air conditioner

A current loop communication and current loop technology, which is applied in space heating and ventilation, heating and ventilation control systems, heating and ventilation safety systems, etc. The problem of large loss of the step-down circuit, etc., to achieve the effect of low power consumption

Inactive Publication Date: 2018-12-11
HISENSE (GUANGDONG) AIR CONDITIONER
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Problems solved by technology

Taking the communication of the inverter air conditioner as an example, at present, the indoor and outdoor communication of the inverter air conditioner generally adopts the direct resistance step-down method of the power supply system to provide communication power, see figure 1 As shown, the resistance direct step-down type is directly stepped down by the power supply voltage supplied by the system through the resistor R13, and the regulated power supply is provided by the voltage regulator diode ZD11, and the RC low-pass circuit is filtered. Th

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  • Current loop communication circuit and air conditioner
  • Current loop communication circuit and air conditioner
  • Current loop communication circuit and air conditioner

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Embodiment Construction

[0022] Hereinafter, specific embodiments of the present invention will be further described in conjunction with the accompanying drawings.

[0023] The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

[0024] The invention provides a current loop communication circuit, which can be used in electrical equipment with current loop communication, has the characteristics of low power consumption and high and low voltage applicability, and has the function of alarming when the wrong line is connected.

[0025] In this embodiment, an inverter air conditioner is taken as an example to illustrate the principle of current loop communication.

[0026] A current loop communication circuit, including a communication ...

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Abstract

The invention discloses a current loop communication circuit and an air conditioner and belongs to the technical field of electronic circuitry. The current loop communication circuit comprises first and second current loop communication circuits; the first current loop communication circuit includes a power supply circuit, a current loop communication control circuit and an overcurrent detection circuit; the power supply circuit includes a switching power supply transformer, a diode and an RC (resistor-capacitor) low-pass filter circuit; switching power is directly output by the diode after rectifying; power voltage is acquired through RC smooth filtering; the second current loop communication circuit includes a current loop control circuit and an overcurrent detection circuit; the opticalcoupling output end of the overcurrent detection circuit is connected with a controller to output a corresponding protective low level, thereby reminding a user of online line adapting errors. The current loop communication circuit that is low in cost helps solve the problem that electrical appliances, such as a variable frequency air conditioner, has low loss in communication; a warning functionfor mistaken line distributing is added, so that fault diagnosis and recording are provided i case of indoor and outdoor communication wiring errors.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a current loop communication circuit and an air conditioner. Background technique [0002] The current loop communication circuit is an interface circuit widely used in serial communication at present. Taking the communication of the inverter air conditioner as an example, at present, the indoor and outdoor communication of the inverter air conditioner generally adopts the direct resistance step-down method of the power supply system to provide communication power, see figure 1 As shown, the resistance direct step-down type is directly stepped down by the power supply voltage supplied by the system through the resistor R13, and the regulated power supply is provided by the voltage regulator diode ZD11, and the RC low-pass circuit is filtered. The step-down resistor R13 generates a lot of heat, and the circuit consumes high power. The power consumption is large, the c...

Claims

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Application Information

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IPC IPC(8): F24F11/58F24F11/49F24F11/88
CPCF24F11/49F24F11/58F24F11/88
Inventor 李锡东彭辉李达珍
Owner HISENSE (GUANGDONG) AIR CONDITIONER
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