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Communication protecting equipment

A communication protection and protection circuit technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problems of danger, wrong wiring, etc., and achieve the effect of less increase in components, improved reliability and safety, and simple structure

Inactive Publication Date: 2013-04-10
SUZHOU SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the indoor and outdoor units of inverter air conditioners mostly use the 485 communication mode with strong anti-interference ability. Since there are two 485 communication lines and two power lines, it is very easy to cause wrong wiring during the connection and assembly process of indoor and outdoor units, resulting in danger.

Method used

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  • Communication protecting equipment
  • Communication protecting equipment

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0014] The principle of the communication protection circuit device of this embodiment is as follows: figure 2 As shown, it is composed of a protection circuit, a detection circuit and a single-chip microcomputer. Among them, the protection circuit is composed of a relay (RYI) and an inverting circuit (Q1, R4), and the detection circuit is composed of a photocouple (PCI), a capacitor (C1) and a resistor (R1-R3).

[0015] The inverting circuit includes a resistor R4 and a transistor Q1, and a forward voltage of 12V is applied to both ends, and a relay RY1 is connected in parallel to the resistor R4.

[0016] The detection circuit includes an optical coupler, a resistor, and a capacitor. Resistors R1 and R2 are respectively connected in series with a relay, and a capacitor C1 is connected in series between the resistors R1 and R2 to form a loop...

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Abstract

Disclosed is a communication protective device, comprising: three parts including a testing circuit, a protective circuit and a single chip microcomputer. When the two inputs of the protective circuit are normal connection of outdoor RS-485 communications, the testing circuit has no output, the single chip microcomputer has no output protection signal, a relay operates attractingly (normally open contact attraction), and indoor and outdoor communications are connected directly through the relay and conduct normal communications; when the input of the protective circuit is in connection with a power supply, the relay of the detection circuit does not operate (normally closed contact attraction), the protective circuit sends out a test signal and informs the single chip microcomputer to send out a protective signal which can make the relay stay in the normally closed contact attraction state and make the power supply signal not being connected with an indoor RS-485 communication circuit, and can realize protection to the 485 communication circuit. The device can realize protection to the 485 communication circuit by a main use of just one relay, the control device is simple-structured and the increasing of components and parts is less, but the reliability and safety are greatly improved.

Description

technical field [0001] The invention relates to a communication protection device, in particular to an indoor and outdoor communication protection device applicable to frequency conversion air conditioners. Background technique [0002] Now, with the enhancement of people's awareness of energy conservation, the application of inverter air conditioners is becoming more and more extensive. Usually, the indoor and outdoor units of inverter air conditioners mostly use the 485 communication mode with strong anti-interference ability. Since there are two 485 communication lines and two power lines, it is very easy to cause wrong wiring during the connection and assembly process of indoor and outdoor units, resulting in danger. . In order to effectively prevent danger and protect communication circuits, it is urgent to design a simple and effective communication protection circuit. Contents of the invention [0003] The purpose of the present invention is to provide a simple an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H11/00
Inventor 赵恩英宋伟张起云徐锡胜
Owner SUZHOU SAMSUNG ELECTRONICS CO LTD