A surge-proof circuit

An anti-surge and circuit technology, applied in the field of electronics, can solve problems such as poor anti-surge capability, failure of the circuit board of the equipment, damage to the circuit board, etc.

Active Publication Date: 2018-12-21
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Equipment placed outdoors, such as the outdoor unit of the air conditioner, may be struck by lightning. If the power line is struck by lightning, the instantaneous high voltage enters the equipment such as the outdoor unit of the air conditioner, and the surge resistance of these devices is poor, which will directly cause the equipment to circuit board failure
[0003] In the prior art, the anti-surge is mainly implemented by using a fuse. A fuse is installed on the fire line. When a surge voltage is generated, the circuit board is protected by blowing the fuse. However, the blowing of the fuse takes a certain amount of time. During this time, the circuit board may have been damaged, and the anti-surge effect is poor.

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Embodiment Construction

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0055] Such as figure 1 As shown, the embodiment of the present invention provides an anti-surge circuit, including:

[0056] The first diode D1, the second diode D2, the third diode D3, the fourth diode D4 and the first varistor RV1;

[0057] The anode of the first diode D1 is connected to the anode of the fourth diode D4, the cathode of the first di...

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Abstract

The invention provides a surge-proof circuit, comprising: a first diode, a second diode, a third diode, a fourth diode and a first varistor; The positive electrode of the first diode is connected withthe positive electrode of the fourth diode, the negative electrode of the first diode is connected with the positive electrode of the second diode, the negative electrode of the second diode is connected with the negative electrode of the third diode, and the positive electrode of the third diode is connected with the negative electrode of the fourth diode; The negative electrode of the first diode is connected with a neutral line, and the negative electrode of the fourth diode is connected with a live wire; A first end of the first varistor is connected to a negative electrode of the fourthdiode, and a second end of the first varistor is connected to a positive electrode of the fourth diode; The positive electrode of the fourth diode is connected to DC ground. The invention provides a surge-proof circuit, which can improve the surge-proof effect.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an anti-surge circuit. Background technique [0002] Equipment placed outdoors, such as the outdoor unit of the air conditioner, may be struck by lightning. If the power line is struck by lightning, the instantaneous high voltage enters the equipment such as the outdoor unit of the air conditioner, and the surge resistance of these devices is poor, which will directly cause the equipment to circuit board fails. [0003] In the prior art, the anti-surge is mainly implemented by using a fuse. A fuse is installed on the fire line. When a surge voltage is generated, the circuit board is protected by blowing the fuse. However, the blowing of the fuse takes a certain amount of time. During this time, the circuit board may have been damaged, and the anti-surge effect is poor. Contents of the invention [0004] The embodiment of the present invention provides a circuit for preven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/042H02H9/047H02H3/20H02H7/1252H02H9/001
Inventor 石泽发
Owner SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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