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Intelligent miniature circuit breaker arc extinguishing device

A technology of miniature circuit breaker and arc extinguishing device, applied in circuit breaker parts, circuit breaker contacts, etc., can solve problems such as damage to circuits and electronic components, poor sealing effect, etc., to improve breaking capacity and facilitate arc extinguishing , to avoid damage to the circuit and the effect of electronic components

Pending Publication Date: 2021-12-21
GUIZHOU TAIYONG CHANGZHENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The arc extinguishing chamber of the existing miniature circuit breaker is closed by the shell to form a semi-airtight arc extinguishing chamber space. Due to the limitation of the structure, the airtight effect is not good, especially in the intelligent miniature circuit breaker, because there are electronic components on the circuit board, It is also necessary to isolate the arc from the circuit board and electronic components to prevent the arc from damaging the circuit and electronic components

Method used

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  • Intelligent miniature circuit breaker arc extinguishing device
  • Intelligent miniature circuit breaker arc extinguishing device
  • Intelligent miniature circuit breaker arc extinguishing device

Examples

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Embodiment 1

[0027] Such as Figure 1-5 As shown, an arc extinguishing device for an intelligent miniature circuit breaker of the present invention includes an arc extinguishing mechanism, and the arc extinguishing mechanism includes an arc extinguishing chamber 6, one end of which is connected to the top of the arc extinguishing chamber 6 and the other end is connected to the moving contact assembly of the circuit breaker 2. The dynamic arc striker 4 adjacent to the head, and the static arc striker 9 respectively connected to the bottom of the arc extinguishing chamber 6 and the static contact assembly 1 of the circuit breaker at both ends; The existence of the arc extinguishing cover is conducive to the increase of the air pressure of the arc extinguishing chamber, forming a pressure difference with the outside, so that the air flow can be discharged from the exhaust port 11 smoothly; the two ends of the arc extinguishing cover are respectively provided with an air inlet 11 and an exhaust...

Embodiment 2

[0038] The difference between this embodiment and Embodiment 1 is:

[0039] Such as Image 6 , Figure 7 As shown, the part of the moving arc runner 4 located in the arc chute is sunken toward the direction of the static arc runner 9 to form a U-shaped structure 41; Protrusions in 4 directions form a convex arc structure 91. The U-shaped structure and the convex arc structure can enhance the magnetic blowing force, which is conducive to the rapid movement of the arc, and can quickly move the arc into the arc extinguishing chamber to improve the breaking capacity.

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Abstract

The invention provides an intelligent miniature circuit breaker arc extinguishing device which comprises an arc extinguishing mechanism, and the arc extinguishing mechanism comprises an arc extinguishing chamber, a movable arc striking sheet and a static arc striking sheet. The arc extinguishing mechanism is covered with the arc extinguishing cover with the closed periphery so that the air pressure of the arc extinguishing chamber is increased, pressure difference is formed between the arc extinguishing chamber and the outside, and airflow is smoothly exhausted from the exhaust port. Two ends of the arc extinguishing cover are respectively provided with an air inlet and an air outlet; the air inlet faces an area between the moving contact assembly and the static contact assembly; and the exhaust port faces an area between the two groups of wire inlet terminals. The independent arc extinguishing cover is additionally arranged outside the arc extinguishing mechanism so that electric arcs can be effectively isolated from a circuit board and electronic elements, the electric arcs are prevented from damaging the circuit and the electronic elements, a relative high voltage can be rapidly formed in the arc extinguishing chamber, the gas in the arc extinguishing chamber can be rapidly exhausted, and arc extinguishing is facilitated; meanwhile, the arc striking sheet is an arc-shaped structure so that the arc is easy to move into the arc extinguishing chamber, and the breaking capacity is improved.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an arc extinguishing device for an intelligent miniature circuit breaker. Background technique [0002] The arc extinguishing chamber of the existing miniature circuit breaker is closed by the shell to form a semi-airtight arc extinguishing chamber space. Due to the limitation of the structure, the airtight effect is not good, especially in the intelligent miniature circuit breaker, because there are electronic components on the circuit board, It is also necessary to isolate the arc from the circuit board and electronic components to prevent the arc from damaging the circuit and electronic components. Contents of the invention [0003] In order to solve the above problems, the object of the present invention is to provide an arc extinguishing device for an intelligent miniature circuit breaker that can effectively isolate the arc from the c...

Claims

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Application Information

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IPC IPC(8): H01H73/18H01H73/04
CPCH01H73/18H01H73/04
Inventor 鲁开智潘绪彭子龙黄小勇黄正乾
Owner GUIZHOU TAIYONG CHANGZHENG TECH CO LTD
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