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Anti-reverse-connection circuit, method and device for power line of variable-frequency air conditioner, and air conditioner

An anti-reverse circuit, frequency conversion air conditioner technology, applied in the field of frequency conversion air conditioners, can solve the problems of incorrect wiring between the indoor unit and outdoor unit of the frequency conversion air conditioner, and the main control board of the outdoor unit is unsafe, so as to eliminate the possibility of burning the board and reduce the cost. , fast effect

Active Publication Date: 2019-11-19
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology

[0004] The main purpose of the present invention is to provide an anti-reverse connection circuit, method, device and air conditioner for the power cord of an inverter air conditioner, aiming to solve the problem that the outdoor unit cannot The technical problem of the main control board being insecure

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  • Anti-reverse-connection circuit, method and device for power line of variable-frequency air conditioner, and air conditioner
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  • Anti-reverse-connection circuit, method and device for power line of variable-frequency air conditioner, and air conditioner

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[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses an anti-reverse-connection circuit, method and device for a power line of a variable-frequency air conditioner, and the air conditioner. A detection unit is connected with an indoor unit and an outdoor unit through a null line, connected with the indoor unit through a first communication line and connected with the outdoor unit through a second communication line, and thusthe detection unit is further connected with a switch unit; the switch unit is connected with the indoor unit through a first firing line and connected with the outdoor unit through a second firing line; the detection unit obtains the output voltage of the indoor unit, the external interruption time is obtained according to the output voltage, and whether the first firing line is in reverse connection with the first communication line or not is judged according to the external interruption time; and the switch unit is disconnected with the indoor unit and the outdoor unit during reverse connection. The external interruption time is obtained through the detection unit, whether the power line is in reverse connection or not is detected according to the external interruption time, a detectionloop is simple, accurate, high in speed and low in cost, a main control panel of the outdoor unit is not powered on in the case of wrong line connection, and thus the possibility of board burning iseradicated.

Description

technical field [0001] The invention relates to the technical field of frequency conversion air conditioners, in particular to an anti-reverse connection circuit, method, device and air conditioner for frequency conversion air conditioner power lines. Background technique [0002] Inverter air conditioner indoor unit and outdoor unit generally use a common N-wire current loop communication circuit. The connection wires between indoor unit and outdoor unit include live wire, neutral wire and communication wire. When these three wires are reversed, if the outdoor unit master If the board is energized, it is very likely that the board will be burned. [0003] Chinese Patent Document No. CN201420335084.X discloses a power supply error protection device for indoor and outdoor units of an inverter air conditioner, and specifically discloses that the live wire, neutral wire, and SIG line on the indoor unit side and the outdoor unit side are connected correspondingly to form a commu...

Claims

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Application Information

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IPC IPC(8): F24F11/88F24F11/61F24F11/64
CPCF24F11/61F24F11/64F24F11/88
Inventor 蔡佳明梁国强周伟坚黄志刚
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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