CN218160072U

CN218160072U - Arc extinguishing system of electric switch and electric switch

Info

Publication number: CN218160072U
Application number: CN202220655636.XU
Authority: CN
Inventors: 张森林; 孙健焜; 刘毅; 骆琳; 易颖
Original assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd
Current assignee: Shanghai Electrical Apparatus Research Institute Group Co Ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-12-27
Anticipated expiration: 2032-03-24

Abstract

The application provides an arc extinguishing system of an electric switch and the electric switch, wherein the electric switch comprises a contact system, the arc extinguishing system comprises a first arc extinguishing chamber, a second arc extinguishing chamber and an arc isolating component, and the first arc extinguishing chamber is arranged on at least one side of the contact system along a first direction; the second arc extinguish chamber is arranged on one side of the contact system along a second direction, and the first direction is intersected with the second direction. The arc separation component is arranged on at least one side of the contact system along the first direction, the arc separation component comprises a first part and a first notch, the first part is arranged corresponding to the first arc extinguish chamber, the first notch is formed by the first part in a concave mode along the first direction, and at least part of electric arcs generated by the contact system move into the first arc extinguish chamber through the first notch. The arc extinguishing system in the embodiment of the application can meet the arc extinguishing requirement under different current conditions, and has strong universality.

Description

Arc extinguishing system of electrical switch and electrical switch

Technical Field

The application relates to the technical field of electrical equipment, in particular to an arc extinguishing system of an electrical switch and the electrical switch.

Background

During the operation of the switch, the voltage between the contacts causes the air dielectric to discharge, forming an arc. Therefore, in various electrical switches such as circuit breakers and contactors, arc extinguishing chambers are generally provided to extinguish arcs so as to ensure the safe operation of electrical equipment.

Arc extinguishing chambers are the core components in electrical switches for limiting the arc spatial position and accelerating the arc extinction. The common arc extinguishing chamber consists of arc extinguishing grids and side plates, and the arc extinguishing capacity of the common arc extinguishing chamber is positively correlated with the number of the grids and the cross-sectional area. How to arrange arc-extinguishing chambers reasonably in a limited space so as to meet the requirements of different arc sizes becomes an important problem in the existing electrical switch.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an arc extinguishing system of an electric switch and the electric switch, and can meet arc extinguishing requirements under different current conditions.

In a first aspect, an embodiment of the present application provides an arc extinguishing system for an electrical switch, where the electrical switch includes a contact system, and the arc extinguishing system includes: the first arc extinguish chamber is arranged on at least one side of the contact system along a first direction; the second arc-extinguishing chamber is arranged on one side of the contact system along a second direction, and the first direction is intersected with the second direction.

The arc separation component is arranged on at least one side of the contact system along the first direction, the arc separation component comprises a first part and a first notch, the first part is arranged corresponding to the first arc extinguish chamber, the first notch is formed by the first part in a concave mode along the first direction, and at least part of electric arcs generated by the contact system move into the first arc extinguish chamber through the first notch.

In some embodiments, the second arc extinguishing chamber includes a third sub-arc extinguishing chamber, the arc blocking assembly includes a second portion disposed on a side of the first portion away from the contact system along the second direction, the second portion includes a first through hole formed therethrough along the first direction, and the third sub-arc extinguishing chamber is located within the first through hole.

In some embodiments, the second arc-extinguishing chamber further includes a fourth sub-arc-extinguishing chamber located on a side of the third sub-arc-extinguishing chamber away from the contact system along the second direction, the arc-isolating assembly includes a third portion disposed on a side of the second portion away from the first portion along the second direction, and a second through hole formed by the third portion penetrating along the first direction, and the fourth sub-arc-extinguishing chamber is located at least partially in the second through hole.

In some embodiments, the arc barrier assembly further comprises a first insulator disposed between the first and second vias.

In some embodiments, the arc extinguishing system further includes a first arc striking component disposed on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along the third direction, the first arc striking component includes a first branch portion disposed in a stacked manner with the first arc extinguishing chamber, and a second branch portion disposed in a stacked manner with the fourth arc extinguishing sub-chamber, and the first direction, the second direction and the third direction intersect each other two by two.

In some embodiments, the arc extinguishing system further includes a second insulating member, the second insulating member includes a first baffle plate disposed on a side of the third sub-arc extinguish chamber facing the first arc striking member along the third direction, and the first baffle plate is spaced from the first arc striking member.

In some embodiments, the second insulating member further includes a second baffle plate disposed on a side of the fourth sub arc-extinguishing chamber away from the first arc-striking member along the third direction, a connecting plate for connecting the first baffle plate and the second baffle plate, and a first insulating plate disposed on a side of the third sub arc-extinguishing chamber close to the fourth sub arc-extinguishing chamber along the second direction;

the first insulating plate and the connecting plate are clamped to form a first channel, and the first insulating plate is provided with a first exhaust hole penetrating along the second direction.

In some embodiments, the arc extinguishing system further includes a second insulating plate disposed on a side of the fourth sub arc extinguishing chamber facing away from the third sub arc extinguishing chamber, the second insulating plate is located on a side of the second insulating plate facing the fourth sub arc extinguishing chamber, and the second insulating plate has a second exhaust hole penetrating along the second direction.

In some embodiments, the arc extinguishing system further includes a second arc striking part disposed at one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, the second arc striking part includes a third branch portion stacked with the first arc extinguishing chamber and a fourth branch portion stacked with the third arc extinguishing sub-chamber, and the first direction, the second direction and the third direction intersect each other.

In some embodiments, the first portion includes a first internal cavity in which the first arc chute is at least partially located;

wherein, first breach passes through first inner chamber and first through-hole intercommunication.

In some embodiments, the first arc-extinguishing chamber comprises a plurality of first grids arranged in a stacked manner and first gaps located between the adjacent first grids, and the third arc-extinguishing chamber comprises a plurality of third grids arranged in a stacked manner and third gaps located between the adjacent third grids;

wherein at least part of the first gap is communicated with the third gap.

In some embodiments, the first portion includes a first inner cavity, the first arc-extinguishing chamber is at least partially located in the first inner cavity, and the second portion includes a second inner cavity disposed along the third direction on one side of the first through hole, the second inner cavity is respectively communicated with the first inner cavity and the second through hole.

In some embodiments, the first arc-extinguishing chamber comprises a plurality of first grids arranged in a stacked manner and first gaps located between the adjacent first grids, and the fourth arc-extinguishing chamber comprises a plurality of fourth grids arranged in a stacked manner and fourth gaps located between the adjacent fourth grids;

wherein, at least part first bars piece extends to the second inner chamber, and at least part first space and fourth space intercommunication.

In some embodiments, the first arc-extinguishing chamber comprises a first sub-arc-extinguishing chamber and a second sub-arc-extinguishing chamber which are respectively arranged on two sides of the contact system along a first direction, and the arc-isolating assembly comprises a first arc-isolating piece arranged on one side of the first sub-arc-extinguishing chamber facing the contact system and a second arc-isolating piece arranged on one side of the second sub-arc-extinguishing chamber facing the contact system;

wherein the first arc barrier comprises a first side wall facing the contact system, the second arc barrier comprises a second side wall facing the contact system, the first side wall is spaced apart from the second side wall and forms a second channel, and at least part of the arc moves into the second arc extinguishing chamber through the second channel.

In some embodiments, at least one of the first and second arc separators includes a gas generating material.

In some embodiments, the first portion comprises a plurality of outer walls surrounding an outer circumference side of the first arc chute, the plurality of outer walls having a first opening facing the contact system;

wherein, the outer wall comprises a third exhaust hole which penetrates through along the thickness direction of the outer wall

In some embodiments, the first arc chute includes a plurality of first grids arranged in a stack, the first grids including first edges facing the contact system, and first arc guiding grooves formed by the first edges being recessed inward.

In a second aspect, embodiments of the present application further provide an electrical switch, including the arc extinguishing system of any of the foregoing embodiments.

In some embodiments, the contact system includes a first movable contact including a first movable contact and a second movable contact including a second movable contact;

the first movable contact is located on one side, close to the second arc-extinguishing chamber, of the second movable contact along the second direction, and the first arc-extinguishing chamber is located on at least one side of the first movable contact along the first direction.

In some embodiments, the first movable contact includes a body portion and an arc striking portion disposed on at least one side of the body portion along a first direction, and an extending direction of the arc striking portion intersects with an extending direction of the body portion.

In some embodiments, the appliance switch further comprises a transfer device configured to be able to generate a magnetic field that at least partially overlaps with a movement path of the arc such that at least part of the arc is transferred to the first arc chute under the influence of the magnetic field.

In some embodiments, the transfer device comprises a permanent magnet, which is arranged on a side of the first arc chute facing away from the contact system in the first direction, or on at least one side of the contact system in a third direction, the first direction, the second direction and the third direction intersecting each other.

The embodiment of the application provides an arc extinguishing system of an electric switch and the electric switch, wherein the arc extinguishing system can meet the arc extinguishing requirements under different current conditions, when the current is small, most of arcs can deflect away from a first plane along a first direction and are transferred to a first arc extinguishing chamber of the arc extinguishing system; when the current is large, most of the arc enters the second arc extinguishing chamber along the second direction. Therefore, the arc extinguishing system in the embodiment of the application can be suitable for different environments and has strong universality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of an electrical appliance switch provided in an embodiment of the present application in a first plane when the electrical appliance switch is turned off;

fig. 2 is a schematic cross-sectional view of an electrical switch provided in an embodiment of the present application, the electrical switch being in a first plane;

FIG. 3 is a schematic diagram of the electrical switch of FIG. 1 from another perspective;

fig. 4 is a schematic structural diagram of an arc extinguishing system in an electrical switch according to an embodiment of the present application;

fig. 5 is a schematic view of a mating structure of a contact system and an arc extinguishing system in an electrical switch according to an embodiment of the present disclosure;

fig. 6 is a schematic view of another mating structure of a contact system and an arc extinguishing system in an electrical switch according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of another structure of an arc extinguishing system in an electrical switch according to an embodiment of the present application;

FIG. 8 is a schematic structural view of the arc assembly of FIG. 7;

fig. 9 is a schematic view of another mating structure of a contact system and an arc extinguishing system in an electrical switch according to an embodiment of the present disclosure;

fig. 10 is a schematic view of a matching structure of the second arc extinguishing chamber and the first arc striking member in the electrical switch provided by the embodiment of the present application;

fig. 11 is a schematic view of a matching structure of the second insulating member and the second arc striking member in the electrical switch according to the embodiment of the present application;

fig. 12 is a schematic structural diagram of an arc extinguishing system in an electrical switch according to an embodiment of the present application;

FIG. 13 is a schematic diagram of an arc path of an electrical switch provided in an embodiment of the present application;

FIG. 14 is a schematic diagram of an arc path of an electrical switch provided in an embodiment of the present application;

FIG. 15 is a schematic structural diagram of an arc-isolating assembly of an electrical switch according to an embodiment of the present disclosure;

FIG. 16 is a schematic diagram of an arc path of an electrical switch provided in an embodiment of the present application;

fig. 17 is a schematic structural diagram of an arc extinguishing system in an electrical switch according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of a contact system in an electrical switch according to an embodiment of the present application;

FIG. 19 is a schematic diagram of a further structure of an electrical switch provided in an embodiment of the present application;

fig. 20 is a schematic structural diagram of an electrical appliance switch provided in an embodiment of the present application.

Description of the labeling:

1. a first arc-extinguishing chamber; 11. a first sub arc extinguishing chamber; 12. a second sub arc extinguishing chamber; 13. a first grid sheet; 131. a first arc chute; 14. a first void;

2. a second arc extinguish chamber; 21. a third sub-arc extinguishing chamber; 211. a third grid sheet; 212. a third void; 22. a fourth sub-arc extinguish chamber; 221. a fourth grid sheet; 222. a fourth void;

3. a contact system; 31. a first moving contact; 311. a first movable contact; 312. a body portion; 313. an arc striking part; 32. a first stationary contact; 33. a second moving contact; 331. a second movable contact;

4. an arc isolation assembly; 41. a first portion; 411. a first notch; 412. a first lumen; 413. a side dam; 414. an outer wall; 4141. a third vent hole; 42. a second portion; 421. a first through hole; 422. a second lumen; 43. a third portion; 431. a second through hole; 44. a first insulating member; 4a, a first arc isolating piece; 4a1, a first side wall; 4b, a second arc isolating piece; 4b1, a second side wall;

51. a first arc striking member; 511. a first section; 512. a second section; 52. a second arc striking member; 521. a third subsection; 522. a fourth subsection; 53. a third arc striking member;

6. a second insulating member; 61. a first baffle plate; 62. a second baffle; 63. a third baffle plate; 64. a connecting plate; 65. a first insulating plate; 651. a first exhaust port; 66. a guide structure; 67. a second insulating plate; 671. a second vent hole;

7. a transfer device; 71. a permanent magnet;

A. a first plane; B. a first channel; C. a second channel;

x, a first direction; y, a second direction; z, third direction.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Direct current is different from alternating current, which has two zero crossings in one cycle, which is the most favorable arc quenching condition. Direct current does not have the moment of natural zero crossing, so that the direct current electrical appliance switch can only realize arc quenching by establishing enough arc voltage. In addition, when the cut-off current is large, the high temperature generated by the electric arc forms a high voltage area and drives the electric arc to extend to a low voltage area. However, the magnetic blow and gas flow effects under a small current are very weak, and the arc moves slowly or cannot move into the arc extinguishing chamber, so that the on-off time of the electric switch becomes very long and unstable. The high temperature of the arc staying for a long time can cause the serious damage of the insulating material or the serious ablation and fusion welding of the contact, so that the electrical switch can not normally operate. Therefore, there is a need for an arc extinguishing system that can satisfy the arc extinguishing requirements under both high current and low current conditions.

Based on the above problems, embodiments of the present application provide an arc extinguishing system for an electrical switch and an electrical switch, which can simultaneously meet the breaking requirements under different current conditions. It should be noted that, the electrical switches mentioned in the embodiments of the present application include, but are not limited to, circuit breakers and contactors.

Referring to fig. 1 to 3, the electrical switch includes a contact system 3, the contact system 3 includes a first movable contact 311 and a first fixed contact 32, the first movable contact 311 and the first fixed contact 32 are disposed correspondingly, and the first movable contact 311 and the first fixed contact 32 are both located in a first plane a, and the first movable contact 311 is configured to be able to move in the first plane a to contact or separate the first fixed contact 32.

The arc extinguishing system comprises a first arc extinguishing chamber 1 and a second arc extinguishing chamber 2, the first arc extinguishing chamber 1 is arranged on at least one side of the contact system 3 along a first direction X, the second arc extinguishing chamber 2 is arranged on one side of the contact system 3 along a second direction Y, and the first direction X is intersected with the second direction Y.

When the electrical switch is connected, the first movable contact 311 and the second movable contact 331 are in a butt state, and the internal current of the electrical switch is conducted; when the electrical switch is manually opened or automatically triggered to open due to a fault, the first movable contact 311 moves relatively in the first plane a, and moves away from the first fixed contact 32, in this process, an electric arc is generated between the first movable contact 311 and the first fixed contact 32, and the electric arc generated by the contact system 3 is transferred to the first arc-extinguishing chamber 1 or the second arc-extinguishing chamber 2 due to the difference of the internal current of the electrical switch. Wherein the first plane a is indicated in fig. 3 in the form of a dashed line.

In particular, the first arc extinguishing chamber 1 is mainly used for breaking the electric arc generated in the case of small currents. The first arc chute 1 is disposed on at least one side of the first plane a along a first direction X, where the first direction X is a direction intersecting the first plane a, and optionally, the first direction X is perpendicular to the first plane a. When the current in the electric switch is small, the electric arc generated by the contact system 3 is small, and at the moment, under the influence of the magnetic field and the lorentz force generated by the current, the electric arc penetrates out of the first plane A and is transferred into the first arc extinguish chamber 1, so that the arc extinguishing effect under the condition of small current is realized.

The second arc extinguish chamber 2 is mainly used for breaking an arc generated under a large current condition, and the second arc extinguish chamber 2 is arranged at one side of the first movable contact 311 along a second direction Y, which is parallel to the first plane a, i.e. the second direction Y intersects with the first direction X, and optionally, the first direction X is perpendicular to the second direction Y. When the current in the electrical switch is large, the electric arc generated by the contact system 3 is large, most of the electric arc and high-temperature gas move upwards to the second arc extinguish chamber 2 along the second direction Y, and the extinguishing effect of the large-current electric arc is achieved.

It should be noted that, under a large current condition, not all arcs enter the second arc-extinguishing chamber 2 along the second direction Y, but also a part of arcs and high-temperature gas deflect along the first direction X and enter the first arc-extinguishing chamber 1, wherein a small part of arcs entering the first arc-extinguishing chamber 1 cannot be maintained and are extinguished quickly. The first arc chute 1 can therefore also serve as an aid in extinguishing the arc in the case of high currents.

According to the embodiment of the application, the arc extinguishing system can meet the arc extinguishing requirements under different current conditions, when the current is small, most of the arc deflects to leave the first plane A along the first direction X and is transferred to the first arc extinguishing chamber 1 of the arc extinguishing system; when the current is large, most of the arc will enter the second arc chute 2 in the second direction Y. Therefore, the arc extinguishing system in the embodiment of the application can be suitable for different environments and has strong universality.

In some embodiments, referring to fig. 1 to 4, the first arc chute 1 comprises a first sub-arc chute 11 and a second sub-arc chute 12 located on both sides of the first plane a, respectively.

The first sub arc-extinguishing chamber 11 and the second sub arc-extinguishing chamber 12 are respectively located on two sides of the first plane a, that is, the first sub arc-extinguishing chamber 11 and the second sub arc-extinguishing chamber 12 are respectively disposed on two sides of the contact system 3 along the first direction X, specifically, the first sub arc-extinguishing chamber 11 and the second sub arc-extinguishing chamber 12 are distributed on two sides of the first movable contact 311 along the first direction X.

The arc generated by the contact system 3 is deflected in the first direction X and leaves the first plane a by an external force such as a lorentz force, and enters the first sub arc extinguishing chamber 11 or the second sub arc extinguishing chamber 12. It is understood that the direction of the current in the electrical switch determines the direction of the lorentz force, and that the direction of the lorentz force changes if the direction of the current changes. Assuming that, in a normal case, when the electrical switch is opened, the arc generated by the contact system 3 is transferred towards the first sub-arc-extinguishing chamber 11 under the action of the lorentz force; when the direction of the current in the electric switch is changed, the electric arc generated by the contact system 3

It is transferred towards the second sub-arc-extinguishing chamber 12 under the action of the lorentz force.

First explosion chamber 1 in the embodiment of this application includes first sub-explosion chamber 11 and the second sub-explosion chamber 12 that is located first plane A both sides, can satisfy under the condition of different current directions, ensures that electric arc can shift to in first explosion chamber 1, improves the commonality of arc extinguishing system and first explosion chamber 1's reliability.

In some embodiments, referring to fig. 4 and 5, at least one of the first and second sub arc-extinguishing

chambers

11 and 12 includes a plurality of first grid pieces 13 arranged in a stacked manner, and the first grid pieces 13 include a first edge close to the first plane a and a first arc-guiding groove 131 formed by the first edge being recessed inwards.

First sub-explosion chamber 11 and second sub-explosion chamber 12 all include a plurality of first bars piece 13, and first bars piece 13 has and strengthens the cooling and be the surface recombination effect promptly, and a plurality of first bars piece 13 range upon range of setting can be cut into the multistage short arc with whole electric arc to promote the initial dielectric strength of arc gap. Alternatively, the first grid 13 is a plate-shaped structure, and the material may be copper, ferromagnetic, ceramic, or the like.

The first tab 13 is provided with a first arc-striking groove 131, the first arc-striking groove 131 is provided on a first edge of the first tab 13 close to the contact system 3, and an opening of the first arc-striking groove 131 faces the contact system 3. Under the action of the magnetic field, the arc can be deflected to the depth of the first arc guiding groove 131 along a specific route, and then completely enters the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12.

This application embodiment is through setting up first arc ignition groove 131 on first grid 13 to the auxiliary arc removes to the depths of first arc ignition groove 131 under the effect in magnetic field, makes electric arc can better shift to first sub-explosion chamber 11 or the sub-explosion chamber 12 of second in, strengthens first sub-explosion chamber 11 and the sub-explosion chamber 12 of second's use reliability.

In some embodiments, referring to fig. 1 and fig. 5, the contact system 3 includes a first movable contact 31, the first movable contact 31 includes a body portion 312 and an arc ignition portion 313 disposed on at least one side of the body portion 312 along a first direction X, and an extending direction of the arc ignition portion 313 intersects an extending direction of the body portion 312 and is directed toward the first arc ignition groove 131.

The first movable contact 311 is located on the first movable contact 31, an arc generated by the separation of the first movable contact 311 from the first fixed contact 32 is located between the first movable contact 311 and the first fixed contact 32, and the arc striking part 313 on the first movable contact 31 is used for transferring the arc located at one end of the first movable contact 31 into the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12. Specifically, since the first movable contact 311 is located in the first plane a and the first movable contact 311 is relatively moving in the first plane a, the arc located at the first movable contact 31 has a tendency to move in the first plane a. In order to make the arc more easily leave the first plane a and transfer to the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12, the arc-striking portion 313 is added in the embodiment of the present application, the arc-striking portion 313 extends from one end of the first movable contact 31 and is gradually disposed close to the first arc-striking groove 131, that is, the arc-striking portion 313 extends towards the direction away from the first plane a relative to the body portion 312, so that the arc can rotate into the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12 from the arc-striking portion 313 under the action of the magnetic field.

Optionally, the number of arc ignition portions 313 is two and is arranged symmetrically with respect to the first plane a, wherein one arc ignition portion 313 is directed to the first sub arc extinguishing chamber 11 and the other arc ignition portion 313 is directed to the second sub arc extinguishing chamber 12.

In addition, referring to fig. 6, another structure of the first movable contact 31 is provided in the present embodiment, the first movable contact 31 is composed of a plurality of contact blades, the arc striking portion 313 is located on the outermost two contact blades, and the first movable contact 311 is located on the central contact blade.

In some embodiments, the arc ignition portion 313 has a tendency to approach the second arc chute 2 in a direction away from the body portion 312; and/or the first ignition slot 131 has a tendency to approach the second arc chute 2 in a direction away from the first plane a.

It can be understood that the arc generated at the first movable contact 31 has a tendency to move in the second direction Y towards the second arc extinguishing chamber 2 under the combined influence of the tendency of the first movable contact 31 to move by itself and the blowing action. In order to meet the requirements of practical situations, the embodiment of the present application sets at least one of the arc ignition portion 313 and the first arc ignition slot 131 to have a tendency to extend in a direction close to the second arc extinguishing chamber 2, so that the arc can more easily pass through the arc ignition portion 313 and be transferred into the first arc ignition slot 131.

In some embodiments, the first sub arc-extinguishing chamber 11 and the second sub arc-extinguishing chamber 12 are symmetrically distributed on both sides of the first plane a.

As can be seen from the foregoing, when the direction of the current in the electrical switch changes, the direction of the arc movement also changes. Generally, when the current magnitude is constant and the current direction is opposite, the moving direction of the arc will be in a mirror image state with respect to the first plane a. Therefore, the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 are symmetrically arranged relative to the first plane a in the embodiment of the application, so that the arc transfer requirement can be met, meanwhile, the structural design of the arc-extinguishing system and the manufacture of the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 are facilitated,

in some embodiments, referring to fig. 1, 7 and 8, the arc extinguishing chamber system further includes an arc blocking assembly 4, the arc blocking assembly 4 is disposed on at least one side of the contact system 3 along the first direction X, the arc blocking assembly 4 includes a first portion 41 corresponding to the first arc extinguishing chamber 1, and a first gap 411 formed by the first portion 41 being recessed along the first direction X, and at least a portion of an arc generated by the contact system 3 moves into the first arc extinguishing chamber 1 through the first gap 411.

The arc isolating component 4 is correspondingly arranged between the first arc extinguish chamber 1 and the contact system 3, and the electric arc generated by the contact system 3 cannot be directly transferred into the first arc extinguish chamber 1, but is transferred into the first arc extinguish chamber 1 through the first notch 411 of the arc isolating component 4. Specifically, the arrangement of the first notch 411 needs to be determined according to the magnetic field direction, and a part of the electric arc generated by the contact system 3 can be directionally transferred into the first notch 411 and reach the first arc-extinguishing chamber 1 under the action of the magnetic field, so that the arrangement of the first notch 411 can ensure that the electric arc enters a specific area of the first arc-extinguishing chamber 1 and then continues to move along a specific path, thereby ensuring the reliability of the arc-extinguishing process of the first arc-extinguishing chamber 1. The size and the specific position relationship of the first notch 411 need to be determined according to actual situations, which is not limited in the embodiment of the present application.

In some embodiments, the arc chute assembly 4 comprises a first arc chute 4a arranged on a side of the first sub-arc-extinguishing chamber 11 facing the contact system 3, and a second arc chute 4b arranged on a side of the second sub-arc-extinguishing chamber 12 facing the arc-extinguishing chamber system; wherein the first arc splitter 4a comprises a first side wall 4a1 facing the side of the contact system 3, the second arc splitter 4b comprises a second side wall 4b1 facing the contact system 3, the first side wall 4a1 and the second side wall 4b1 are arranged at a distance to form a second channel C, and at least part of the arc generated by the contact system 3 moves into the second arc chute 2 through the second channel C.

The first arc isolating piece 4a is arranged corresponding to the first sub-arc-extinguishing chamber 11, the second arc isolating piece 4b is arranged corresponding to the second sub-arc-extinguishing chamber 12, the first arc isolating piece 4a comprises a first part 41 corresponding to the first sub-arc-extinguishing chamber 11 and a first gap 411, and the second arc isolating piece 4b comprises a first part 41 corresponding to the second sub-arc-extinguishing chamber 12 and a first gap 411. The arc is transferred to the first sub arc extinguishing chamber 11 through the first notch 411 of the first arc barrier 4a and transferred to the second sub arc extinguishing chamber 12 through the first notch 411 of the second arc barrier 4 b. The first arc isolating piece 4a and the second arc isolating piece 4b may have the same shape and size or different shapes and sizes, which is not limited in the embodiment of the present application. Optionally, the first arc-insulating part 4a and the second arc-insulating part 4b are symmetrically distributed on both sides of the first plane a.

The first side wall 4a1 is a surface of the first arc splitter 4a facing the contact system 3, i.e. a surface away from the first sub-arc-extinguishing chamber 11; the second side wall 4b1 is the surface of the second arcing contact 4b facing the contact system 3, i.e. the surface facing away from the second sub-arc-extinguishing chamber 12. The first side wall 4a1 is spaced from the second side wall 4b1 to form a second channel C, which communicates with the second arc chute 2. When the current value in the electrical switch is large, the arc generated by the contact system 3 can be transferred into the second arc extinguish chamber 2 through the second channel C, so as to meet the requirement of a large current condition.

It should be noted that the second channel C, in addition to being used for transferring the high-current arc to the second arc chute 2, can also transport part of the gas flow to the second arc chute 2 and out of the interior of the electrical switch through the second arc chute 2. Specifically, an arc is generated from the first movable contact 311 and the first stationary contact 32 in the contact system 3, and a high-voltage environment is easily formed near the position due to the influence of the arc or the like, while the second arc-extinguishing chamber 2 relatively forms a low-voltage environment. The gas flow will thus be transferred into the second arc chute 2 through the second channel C under the influence of the pressure.

In some embodiments, as shown in fig. 1, 7 and 8, the second arc-extinguishing chamber 2 comprises a third sub-arc-extinguishing chamber 21, the arc-separating assembly 4 comprises a second portion 42 disposed on a side of the first portion 41 away from the contact system 3 along the second direction Y, the second portion 42 comprises a first through hole 421 penetratingly formed along the first direction X, and the third sub-arc-extinguishing chamber 21 is located within the first through hole 421.

The arc suppression assembly 4 includes a first portion 41 and a second portion 42, the second portion 42 is located on a side of the first portion 41 close to the third sub-arc-extinguishing chamber 21 along the second direction Y, and the second portion 42 and the third sub-arc-extinguishing chamber 21 overlap in the second direction Y, so in order to ensure the arrangement of the third sub-arc-extinguishing chamber 21, in the embodiment of the present application, a first through hole 421 is provided in the second portion 42, and the first through hole 421 is used to avoid the third arc-extinguishing chamber. Meanwhile, the third sub-arc-extinguishing chamber 21 can penetrate through the first through hole 421, the size of the third sub-arc-extinguishing chamber 21 in the first direction X can be increased through the design, and the arc-extinguishing reliability of the third sub-arc-extinguishing chamber 21 is improved. Optionally, the first portion 41 and the second portion 42 are of a unitary construction.

Furthermore, the third sub-arc extinguishing chamber 21 is in communication with the first through hole 421, and the first through hole 421 is in communication with the second channel C, through which the arc generated by the contact system 3 can directly enter into the third sub-arc extinguishing chamber 21.

It should be noted that, in the embodiment of the present application, the second arc-extinguishing chamber 2 may include a third sub-arc-extinguishing chamber 21 and other sub-arc-extinguishing chambers as shown in fig. 1; as shown in fig. 9, the second arc-extinguishing chamber 2 only includes the third sub-arc-extinguishing chamber 21, which is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 1, 7 and 8, the second arc extinguishing chamber 2 further comprises a fourth sub arc extinguishing chamber 22 located on a side of the third sub arc extinguishing chamber 21 away from the contact system 3 along the second direction Y, the arc extinguishing assembly 4 comprises a third portion 43 disposed on a side of the second portion 42 away from the first portion 41 along the second direction Y, and a second through hole 431 formed by the third portion 43 penetrating along the first direction X, the fourth sub arc extinguishing chamber 22 being located at least partially within the second through hole 431.

The second arc extinguish chamber 2 comprises a third arc extinguish chamber 21 and a fourth arc extinguish chamber 22, the number of grid pieces in the second arc extinguish chamber 2 can be increased through the design, and the arc extinguish effect of the second arc extinguish chamber 2 is improved. Meanwhile, the arc-isolating assembly 4 further includes a third portion 43 corresponding to the fourth sub arc-extinguishing chamber 22, and a second through hole 431 located in the third portion 43, and the second through hole 431 is used for avoiding the fourth sub arc-extinguishing chamber 22, and at the same time, the size space of the fourth sub arc-extinguishing chamber 22 in the first direction X can be increased. The positional relationship between the third sub arc-extinguishing chamber 21 and the fourth sub arc-extinguishing chamber 22 in the first direction X is not limited in the present application.

Optionally, the arc extinguishing system further includes a third arc striking component 53, one end of the third arc striking component 53 is stacked with the third sub-arc extinguishing chamber 21, the other end of the third arc striking component is stacked with the fourth sub-arc extinguishing chamber 22, and the middle connecting section is used to connect two ends of the third arc striking component 53, and the third arc striking component 53 is used to realize series connection of arcs between the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22, and is suitable for use conditions of high-current arcs.

In some embodiments, as shown in fig. 7 and 8, the arc barrier assembly 4 further comprises a first insulator 44 disposed between the first through hole 421 and the second through hole 431.

The first insulating member 44 is disposed between the first through hole 421 and the second through hole 431 along the second direction Y, that is, the first insulating member 44 is disposed between the third sub arc-extinguishing chamber 21 and the fourth sub arc-extinguishing chamber 22. The setting of first insulating part 44 is used for the insulating setting of part space between third sub-explosion chamber 21 and the fourth sub-explosion chamber 22, prevents to puncture behind one's back, reduces the risk that the space between third sub-explosion chamber 21 and the fourth sub-explosion chamber 22 is punctured, and then avoids electric arc can not pass through the partial bars piece in the third sub-explosion chamber 21, influences the arc extinguishing effect of second explosion chamber 2.

Furthermore, when the third arc ignition member 53 is present, the first insulating member 44 serves to insulate the connection section between the third sub arc extinguishing chamber 21 and the third arc ignition member 53, avoiding the arc from directly transferring from the third sub arc extinguishing chamber 21 to the connection section of the third arc ignition member 53. It should be noted that, in the embodiment of the present application, the connection section of the third arc extinguishing sub-chamber 21 and the third arc striking member 53 is provided with insulation therebetween, so as to avoid direct transfer of the arc into the connection section of the third arc striking member 53, so that the arc in the third arc extinguishing sub-chamber 21 can be transferred into the fourth arc extinguishing sub-chamber 22 only through one end of the third arc striking member 53 stacked with the third arc striking member 21, and the arc is transferred from the third arc extinguishing sub-chamber 21 into the fourth arc extinguishing sub-chamber 22 along a specific path.

In some embodiments, the height of the first through hole 421 in the third direction Z is smaller than the height of the second through hole 431 in the third direction Z, and the first direction X, the second direction Y, and the third direction Z intersect each other two by two.

The third direction Z may be a stacking direction of the first grid 13 in the first arc-extinguishing chamber 1, and may also be a stacking direction of the grids in the third and fourth sub-arc-extinguishing

chambers

21 and 22. Optionally, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

The first through hole 421 is used for placing the third sub arc-extinguishing chamber 21, and the second through hole 431 is used for placing the fourth sub arc-extinguishing chamber 22. It can be understood that the height of the first through hole 421 in the third direction Z is the arrangement height of the third sub arc-extinguishing chamber 21, and the height of the second through hole 431 in the third direction Z is the arrangement height of the fourth sub arc-extinguishing chamber 22. In the embodiment of the present application, the height of the first through hole 421 in the third direction Z is set to be smaller than the height of the second through hole 431 in the third direction Z, so that the fourth sub-arc-extinguishing chamber 22 can obtain a larger arrangement space than the third sub-arc-extinguishing chamber 21, and the height and the arc-extinguishing capability of the fourth sub-arc-extinguishing chamber 22 are improved.

In some embodiments, referring to fig. 7 and 10, the arc extinguishing system further includes a first arc striking member 51 disposed at one side of the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2 along the third direction Z, and the first arc striking member 51 includes a first branch 511 stacked with the first arc extinguishing chamber 1 and a second branch 512 stacked with the fourth arc extinguishing sub-chamber 22.

The first arc striking member 51 is located on the same side of the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22 along the third direction Z, and serves as an arc striking grid of the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22. Simultaneously first striking spare 51 can be connected with first stationary contact 32 electricity, and the electric arc on the first stationary contact 32 can shift to first explosion chamber 1 or fourth sub-explosion chamber 22 through first striking spare 51, and first explosion chamber 1 and fourth sub-explosion chamber 22 homoenergetic promptly can play and extinguish electric arc effect on first stationary contact 32, improve the arc extinguishing reliability.

It should be noted that the first arc-extinguishing chamber 1 includes a first sub-arc-extinguishing chamber 11 and a second sub-arc-extinguishing chamber 12, and in order to meet the arc-striking requirements of the first sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12 at the same time, the number of the first arc-striking pieces 51 may be set to be one or two. Specifically, the number of the first arc striking members 51 may be two, and the two first arc striking members 51 are arranged side by side in the first direction X and respectively correspond to the first sub arc extinguishing chamber 11 and the second sub arc extinguishing chamber 12 in the first arc extinguishing chamber 1; or as shown in fig. 10, there is only one first arc striking element 51, and the single first arc striking element 51 may cover the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 at the same time, that is, the single first arc striking element 51 simultaneously becomes an arc striking grid of the first sub-arc extinguishing chamber 11, the second sub-arc extinguishing chamber 12, and the fourth sub-arc extinguishing chamber 22.

In some embodiments, the arc extinguishing system further includes a second insulating member 6, the second insulating member 6 includes a first baffle 61 disposed on a side of the third sub-arc extinguishing chamber 21 facing the first arc striking member 51 along the third direction Z, and the first baffle 61 is disposed at a distance from the first arc striking member 51.

The second insulating member 6 is mainly used for insulating a part of the third sub-arc-extinguishing chamber 21 from the fourth sub-arc-extinguishing chamber 22, so that the arc on the third sub-arc-extinguishing chamber 21 can be transferred to the fourth sub-arc-extinguishing chamber 22 only by the third arc-striking member 53, and the matching reliability of the third sub-arc-extinguishing chamber 21 and the fourth sub-arc-extinguishing chamber 22 is improved.

In the embodiment of the present application, a first baffle 61 is disposed on a side of the second insulating member 6 close to the first arc striking member 51, and the first baffle 61 may be stacked with the grid plate in the third sub-arc extinguishing chamber 21. The first baffle 61 is spaced from the first arc-striking member 51, and this design can insulate and separate the third arc-extinguishing chamber 21 from the first arc-striking member 51, so as to prevent the arc on the first stationary contact 32 from being transferred to the third arc-extinguishing chamber 21 through the first arc-striking member 51. While the space between the first baffle 61 and the first ignition part 51 can be partially a grid, the grid in the first arc chute 1 or the fourth sub-arc chute 22 can extend between the first baffle 61 and the first ignition part 51.

In some alternative embodiments, part of the first grid 13 in the first arc chute 1 extends from the first portion 41 of the arc chute assembly 4 between the first baffle 61 and the first arc ignition element 51, i.e. into the second portion 42. In this case, at least one of the first arc-extinguishing chamber 1 and the fourth sub-arc-extinguishing chamber 22 needs to be made of a material that is not magnetically permeable, including but not limited to copper, ceramic, etc. This design makes it possible to avoid the arc in the first arc chute 1 from transferring into the fourth sub-arc chute 22.

Exemplarily, as shown in fig. 10, the second insulating member 6 may further include a third baffle 63 disposed on a side of the third sub-arc-extinguishing chamber 21 facing away from the first arc-striking member 51 along the third direction Z, the first baffle 61 and the third baffle 63 are both stacked with a grid plate in the third sub-arc-extinguishing chamber 21, and the third sub-arc-extinguishing chamber 21 is configured to insulate and separate the third sub-arc-extinguishing chamber 21 from an inner wall of the electrical switch, so as to prevent the arc from moving to the inner wall through the third sub-arc-extinguishing chamber 21 and damaging the inner wall of the electrical switch.

In some embodiments, referring to fig. 10 and 11, the second insulating member 6 further includes a second baffle 62 disposed on a side of the fourth arc extinguishing sub-chamber 22 away from the first arc striking member 51 along the third direction Z, a connecting plate 64 for connecting the first baffle 61 and the second baffle 62, and a first insulating plate 65 disposed on a side of the third arc extinguishing sub-chamber 21 close to the fourth arc extinguishing sub-chamber 22 along the second direction Y; the first insulating plate 65 and the connecting plate 64 are sandwiched to form a first channel B, and the first insulating plate 65 has a first exhaust hole 651 penetrating along the second direction Y.

Second baffle 62 sets up in the one side that fourth sub-explosion chamber 22 deviates from first striking piece 51, and second baffle 62 can play the insulating effect that separates fourth sub-explosion chamber 22 and electrical apparatus switch inner wall equally, avoids electric arc to remove to the inner wall through fourth sub-explosion chamber 22 and produces the destruction. The first shutter 61 and the second shutter 62 are connected by a connecting plate 64, and the connecting plate 64 has a tendency to incline in the third direction Z away from the first ignition element 51 in a direction approaching the second shutter 62 in the second direction Y.

The linkage segment of third striking piece 53 is located the one side that connecting plate 64 deviates from the third arc extinguishing chamber, and connecting plate 64 can reduce the risk that electric arc directly shifts to in the linkage segment of third striking piece 53 among the third sub-arc extinguishing chamber 21, and connecting plate 64 still is provided with first insulation plate 65 towards one side of third sub-arc extinguishing chamber 21 simultaneously, and first insulation plate 65 has further strengthened the insulating effect between the linkage segment of third sub-arc extinguishing chamber 21 and third striking piece 53.

In addition, in the embodiment of the present application, the first insulating plate 65 is provided with the first exhaust hole 651, and a high-temperature gas flow generated by or flowing through the third sub-arc-extinguishing chamber 21 can leave the third sub-arc-extinguishing chamber 21 through the first exhaust hole 651. Meanwhile, the first insulating plate 65 and the connecting plate 64 are clamped to form a first channel B, and the high-temperature gas flow leaving the third sub-arc-extinguishing chamber 21 moves into the first channel B, then moves to the side, away from the fourth sub-arc-extinguishing chamber 22, of the second baffle 62, and finally is exhausted out of the arc-extinguishing system.

Optionally, the first insulating plate 65 extends along the third direction Z, and the connecting plate 64 is disposed obliquely to the first insulating plate 65, that is, the extending direction of the first insulating plate 65 is the same as the stacking direction of the grid plates in the third sub-arc-extinguishing chamber 21, which is more favorable for releasing the high-temperature gas flow in the third sub-arc-extinguishing chamber 21.

In some embodiments, the connecting plate 64 and the side of the second baffle plate 62 facing away from the first arc ignition member 51 protrude to form a guiding structure 66, and the guiding structure 66 is used for guiding the gas flow and adjusting the exhaust area of the third sub-arc extinguishing chamber 21.

In some embodiments, the arc extinguishing system further includes a second insulating plate 67 disposed on a side of the fourth sub arc extinguishing chamber 22 facing away from the third sub arc extinguishing chamber 21, the second insulating plate 67 is located on a side of the second insulating plate 62 facing the fourth sub arc extinguishing chamber 22, and the second insulating plate 67 has a second exhaust hole 671 penetrating along the second direction Y.

The second insulating plate 67 is located at the tail position of the second arc extinguish chamber 2, and plays a role in insulation protection. Meanwhile, the second insulating plate 67 is provided with a second exhaust hole 671, and the high-temperature gas flow in the fourth sub-arc-extinguishing chamber 22 can leave the fourth sub-arc-extinguishing chamber 22 through the second exhaust hole 671 and be released. Optionally, the second insulating plate 67 is shaped to extend along the third direction Z, and an orthographic projection of the fourth sub arc-extinguishing chamber 22 on the second insulating plate 67 is located within an outer contour of the second insulating plate 67, so that the second insulating plate 67 can cover the entire fourth sub arc-extinguishing chamber 22.

In some embodiments, referring to fig. 12, the arc extinguishing system further includes a second arc striking member 52 disposed on one side of the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2 along the third direction Z, and the second arc striking member 52 includes a third subsection 521 stacked with the first arc extinguishing chamber 1 and a fourth subsection 522 stacked with the third sub-arc extinguishing chamber 21.

First striking piece 51 and second striking piece 52 are located first explosion chamber 1 both sides on third direction Z respectively, and the one end of second striking piece 52 is located the first movable contact 31 can deflect to apart from first stationary contact 32 furthest position department, and electric arc on the first movable contact 31 can shift to first explosion chamber 1 and third sub-explosion chamber 21 through second striking piece 52, and the same with first striking piece 51 is, and the quantity of second striking piece 52 also can be one or two, and this application embodiment is no longer repeated here.

Referring to fig. 13 and 14, fig. 13 is a schematic view of arc formation under a low current condition, fig. 14 is a schematic view of arc formation under a high current condition, and the direction of an arrow in the figures is a moving path of the arc. In fig. 13, since the current in the electrical switch is small, the generated arc can be directly transferred into the first arc-extinguishing chamber 1 through the first movable contact 31. In fig. 14, since the current inside the electrical switch is large, most of the generated current will be transferred to the second arc-striking member 52 through the first movable contact 31, and then transferred to the third sub-arc-extinguishing chamber 21 through the second arc-striking member 52, at this time, due to the existence of the first insulating member 44 (not shown in the figure) and the second insulating member 6, the arc can only move to the fourth sub-arc-extinguishing chamber 22 through the extending direction of the third arc-striking member 53, so as to achieve the arc-extinguishing effect.

In some embodiments, referring to fig. 7 and 15, the first portion 41 includes a first internal cavity 412, the first arc chute 1 being at least partially located in the first internal cavity 412; the first gap 411 is connected to the first through hole 421 through the first inner cavity 412.

First explosion chamber 1 can include first sub-explosion chamber 11 and second sub-explosion chamber 12, and first arc piece 4a and second arc piece 4b that separates can include two first inner chambers 412 that correspond with first sub-explosion chamber 11 and second sub-explosion chamber 12 respectively equally, and the opening of the first inner chamber 412 that corresponds with first sub-explosion chamber 11 deviates from the setting of second sub-explosion chamber 12 along first direction X, and the opening of the first inner chamber 412 that corresponds with second sub-explosion chamber 12 deviates from the setting of first sub-explosion chamber 11 along first direction X. Optionally, a mounting groove is provided in the first inner cavity 412 for mounting the grid in the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12.

First breach 411 is connected with first through-hole 421 through first inner chamber 412, and first through-hole 421 is used for setting up third sub-explosion chamber 21, and the intercommunication of first explosion chamber 1 and second explosion chamber 2 can be realized with the intercommunication of first through-hole 421 to first inner chamber 412 for partial high temperature gas flow in the first explosion chamber 1 shifts to the third sub-explosion chamber 21 in, and shifts through first passageway B and leaves the arc extinguishing system.

In some embodiments, the first portion 41 further includes a side baffle 413 disposed on a side of the first inner cavity 412 away from the second arc chute 2 along the second direction Y, and the side baffle 413 is disposed to ensure that the high-temperature gas flow entering the first arc chute 1 does not flow back into the contact system 3, thereby improving the reliability of the contact system 3. At the same time, the gas collected at the side baffle 413 can create a high-pressure environment, facilitating the movement of the gas flow into the second arc chute 2.

In some embodiments, the first arc-extinguishing chamber 1 includes first grids 13 arranged in a stacked manner and first gaps 14 located between adjacent first grids 13, and the third arc-extinguishing chamber 21 includes a plurality of third grids 211 arranged in a stacked manner and third gaps 212 located between adjacent third grids 211; wherein at least a portion of the first void 14 is in communication with the third void 212.

The first gap 14 and the third gap 212 are communicated, so that the high-temperature gas flow in the first arc-extinguishing chamber 1 is transferred to the third sub-arc-extinguishing chamber 21, the gas conduction capability is improved, and the gas flow is prevented from being accumulated in the first arc-extinguishing chamber 1.

In some embodiments, as shown in fig. 7 and 15, the second portion 42 includes a second inner cavity 422 disposed at one side of the first through hole 421 along the third direction Z, and the second inner cavity 422 is respectively communicated with the first inner cavity 412 and the second through hole 431.

As can be seen from the foregoing, the second through hole 431 is used for disposing the fourth sub arc-extinguishing chamber 22, and the second inner cavity 422 is disposed to enable communication between the first arc-extinguishing chamber 1 and the fourth sub arc-extinguishing chamber 22, so that the high-temperature gas flow in the first arc-extinguishing chamber 1 can be transmitted into the fourth sub arc-extinguishing chamber 22 and leave the arc-extinguishing chamber system through the fourth sub arc-extinguishing chamber 22.

In some embodiments, the fourth sub-arc chute 22 includes a plurality of fourth grids 221 arranged in a stack and fourth gaps 222 between adjacent fourth grids 221; wherein at least a portion of the first grid 13 extends to the second cavity 422, and at least a portion of the first gap 14 is communicated with the fourth gap 222.

The communication between the first gap 14 and the fourth gap 222 is helpful for transferring the high-temperature gas flow in the first arc-extinguishing chamber 1 to the third sub-arc-extinguishing chamber 21, so as to improve the gas conduction capability and avoid the gas flow from accumulating in the first arc-extinguishing chamber 1.

In the arc extinguishing system provided by the embodiment of the application, as shown in fig. 16, the transfer process of the high-temperature air flow in the arc extinguishing system can be realized in three cases. In the first case, the high-temperature gas flow can be diverted into the second arc extinguishing chamber 2 through the second channel C formed between the first arc barrier 4a and the second arc barrier 4b and then be diverted away from the arc extinguishing system through the second arc extinguishing chamber 2. In the second case, the high-temperature gas flow may enter the first arc-extinguishing chamber 1 through the first gap 411, then be transferred into the third sub-arc-extinguishing chamber 21 through the first inner cavity 412, and exit the arc-extinguishing system through the first channel B. In the third case, the high-temperature gas flow may enter into the first arc-extinguishing chamber 1 through the first notch 411, then transfer into the second inner chamber 422 through the first inner chamber 412, transfer into the fourth sub-arc-extinguishing chamber 22 through the second inner chamber 422, and finally exit from the arc-extinguishing system through the second exhaust hole 671 corresponding to the fourth sub-arc-extinguishing chamber 22.

In some embodiments, at least one of the first arc splitter 4a and the second arc splitter 4b comprises a gas-generating material.

The gas generating material can generate gas under specific conditions, and the first arc isolating piece 4a or the second arc isolating piece 4b generates gas in the arc extinguishing operation process of the arc extinguishing system, so that the movement of the electric arc is assisted, and the gas blowing effect on the electric arc is achieved. Specifically, the gas generated by the first arc-isolating piece 4a and the second arc-isolating piece 4b can form a certain high-voltage environment near the second channel C near the first arc-extinguishing chamber 1, and under the combined action of magnetic blowing and strong atmospheric pressure, the gas can tend to move towards the second arc-extinguishing chamber 2, and is finally cut and extinguished by the grid in the second arc-extinguishing chamber 2.

In some embodiments, referring to fig. 17, the first portion 41 comprises a plurality of outer walls 414 surrounding the outer periphery of the first arc chute 1, the plurality of outer walls 414 having a first opening facing the contact system 3; the outer wall 414 includes a third exhaust hole 4141 penetrating in the thickness direction thereof.

In this application embodiment, first explosion chamber 1 and second explosion chamber 2 no longer communicate each other, and a plurality of outer walls 414 enclose to close and form the accommodation space that is used for holding first explosion chamber 1, and in order to guarantee that the air current in first explosion chamber 1 can obtain releasing simultaneously, this application embodiment has still set up third exhaust hole 4141 on outer wall 414, and the gas in first explosion chamber 1 can obtain releasing through third exhaust hole 4141. Optionally, at least a portion of the third vent 4141 is disposed through the outer wall 414 along the first direction X.

In some embodiments, referring to fig. 18, the contact system 3 includes a first movable contact 31 and a second movable contact 33, the first movable contact 31 includes a first movable contact 311, and the second movable contact 33 includes a second movable contact 331; wherein, the first movable contact 311 is located at one side of the second movable contact 331 close to the second arc-extinguishing chamber 2 along the second direction Y, and the first arc-extinguishing chamber 1 is located at least one side of the first movable contact 311 along the first direction X.

The contact system 3 includes two movable contacts, and the first movable contact 31 plays a role of protecting the second movable contact 33. Specifically, the electrical switch is turned on by the contact between the second moving contact 331 on the second moving contact 33 and the corresponding stationary contact, when a fault occurs in the electrical switch or manual disconnection is required, the second moving contact 33 drives the first moving contact 31 to deflect synchronously, the second moving contact 331 is separated from the corresponding stationary contact, but due to the existence of the first moving contact 31, an electric arc is not formed at the second moving contact 331 at this time, the current in the electrical switch can continuously move from the second moving contact 331 to the first moving contact 311, and meanwhile, the first moving contact 311 is separated from the first stationary contact 32, and the electric arc is generated between the first moving contact 311 and the first stationary contact 32. Therefore, the arrangement of the first movable contact 31 can play a role in protecting the second movable contact 33, and the damage of the second movable contact 33 caused by the existence of the electric arc is reduced.

In some embodiments, as shown in fig. 1 and 18, the second movable contact 331 is located at a side of the first arc chute 1 facing away from the second arc chute 2 in the second direction Y.

In the embodiment of the present application, the second movable contact 331 is located outside the first arc extinguishing chamber 1, that is, the first movable contact 311 is located inside the arc extinguishing system, and the second movable contact 331 is located outside the arc extinguishing system, which can avoid further reducing the risk that the second movable contact 331 participates in the arc extinguishing process, and plays a role in protecting the second movable contact 331.

In some embodiments, referring to fig. 19, the electric appliance switch further comprises a transfer device 7, the transfer device 7 being configured to be able to generate a magnetic field, the magnetic field at least partially overlapping the movement path of the electric arc, so that at least part of the electric arc is transferred into the first arc chute 1 under the effect of the magnetic field.

The magnetic field generated by the transfer device 7 can generate lorentz force to change the movement track of the arc, so that at least part of the arc can be transferred into the first arc-extinguishing chamber 1 under the action of the magnetic field. The structure, arrangement, and the like of the transfer device 7 are not limited in the embodiments of the present application, as long as the magnetic field generated by the transfer device 7 can drive part of the arc to be transferred into the first arc-extinguishing chamber 1.

In some embodiments, the transfer device 7 comprises a permanent magnet 71, the permanent magnet 71 being arranged on at least one side of the contact system 3 in the third direction Z.

The permanent magnet 71 usually comprises two magnets with opposite polarity, and the magnetic field generated by the permanent magnet 71 can change the arc motion path to help the arc transfer into the first arc chute 1. In the present embodiment, the permanent magnet 71 may be provided only one and located on one side of the contact system 3, or may be provided two and arranged on both sides of the contact system 3. Exemplarily, the number of permanent magnets 71 is two and arranged on both sides of the contact system 3. In this case, the two permanent magnets 71 are respectively located on the side of the first fixed contact 32 away from the first movable contact 311, and the side of the first movable contact 311 away from the first fixed contact 32, i.e., the transfer device 7 is arranged at the periphery of the arc generation. This design enables to deflect the arc in the direction of the first sub arc chute 11 or the second sub arc chute 12 in the first arc chute 1.

In some embodiments, referring to fig. 20, the permanent magnet 71 is disposed on a side of the first arc chute 1 facing away from the contact system 3 along the first direction X.

First explosion chamber 1 is including first sub-explosion chamber 11 and second sub-explosion chamber 12, and the quantity of permanent magnet 71 is two, and a permanent magnet 71 is located one side that first sub-explosion chamber 11 deviates from second sub-explosion chamber 12, and another permanent magnet 71 is located one side that second sub-explosion chamber 12 deviates from first sub-explosion chamber 11, and two permanent magnet 71 symmetries set up. This design makes it possible to arrange the permanent magnet 71 directly on the first arc splitter 4a and the second arc splitter 4b, thereby reducing the difficulty of mounting the permanent magnet 71.

It should be noted that the single permanent magnet 71 includes two magnetic poles, i.e. an N pole and an S pole, where the N pole may be located on a side of the S pole close to the second arc-extinguishing chamber 2, or may be located on a side of the S pole away from the second arc-extinguishing chamber 2, that is, the arrangement manner of the two magnetic poles with opposite polarities in the single permanent magnet 71 is not limited in this embodiment of the application.

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

As described above, only the specific embodiments of the present application are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the corresponding processes in the foregoing method embodiments may be referred to for replacement of the other connection manners described above, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.

Claims

1. An arc quenching system for an electrical switch, the electrical switch comprising a contact system, the arc quenching system comprising:

the first arc-extinguishing chamber is arranged on at least one side of the contact system along a first direction;

the second arc extinguish chamber is arranged on one side of the contact system along a second direction, and the first direction is intersected with the second direction;

the arc separation subassembly, follow the first direction set up in at least one side of contact system, the arc separation subassembly include with the first part that first explosion chamber corresponds the setting, and by the first part is followed the sunken first breach that forms of first direction, at least partial electric arc that the contact system produced passes through first breach removes extremely in the first explosion chamber.

2. The arc extinguishing system of claim 1, wherein the second arc extinguishing chamber comprises a third sub-arc extinguishing chamber, the arc blocking assembly comprises a second portion disposed on a side of the first portion away from the contact system along the second direction, the second portion comprises a first through hole formed therethrough along the first direction, and the third sub-arc extinguishing chamber is located within the first through hole.

3. The arc extinguishing system of claim 2, wherein the second arc extinguishing chamber further comprises a fourth sub arc extinguishing chamber located on a side of the third sub arc extinguishing chamber away from the contact system along the second direction, the arc blocking assembly comprises a third portion disposed on a side of the second portion away from the first portion along the second direction, and a second through hole formed by the third portion penetrating along the first direction, and the fourth sub arc extinguishing chamber is located at least partially in the second through hole.

4. The arc extinguishing system of claim 3, wherein the arc barrier assembly further comprises a first insulator disposed between the first and second through holes.

5. The arc extinguishing system according to claim 3, further comprising a first arc striking piece arranged on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, wherein the first arc striking piece comprises a first branch arranged in a stacked mode with the first arc extinguishing chamber and a second branch arranged in a stacked mode with the fourth arc extinguishing sub-chamber, and the first direction, the second direction and the third direction are intersected in pairs.

6. The arc extinguishing system according to claim 5, further comprising a second insulating member including a first baffle disposed on a side of the third sub-arc extinguishing chamber facing the first arc striking member in a third direction, the first baffle being spaced apart from the first arc striking member.

7. The arc extinguishing system according to claim 6, wherein the second insulating member further comprises a second baffle plate disposed on a side of the fourth sub-arc extinguishing chamber facing away from the first arc striking member in the third direction, a connecting plate for connecting the first baffle plate and the second baffle plate, and a first insulating plate disposed on a side of the third sub-arc extinguishing chamber adjacent to the fourth sub-arc extinguishing chamber in the second direction;

8. The arc extinguishing system according to claim 7, further comprising a second insulating plate disposed on a side of the fourth sub arc extinguishing chamber facing away from the third sub arc extinguishing chamber, wherein the second insulating plate is located on a side of the second insulating plate facing the fourth sub arc extinguishing chamber, and the second insulating plate has a second exhaust hole penetrating therethrough along the second direction.

9. The arc extinguishing system according to claim 2, further comprising a second arc striking element arranged on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, wherein the second arc striking element comprises a third branch arranged in a stacked manner with the first arc extinguishing chamber and a fourth branch arranged in a stacked manner with the third arc extinguishing sub-chamber, and the first direction, the second direction and the third direction are intersected in pairs.

10. The arc extinguishing system of claim 2, wherein the first portion includes a first internal cavity, the first arc chute being at least partially located in the first internal cavity;

wherein the first gap is communicated with the first through hole through the first inner cavity.

11. The arc extinguishing system according to claim 10, wherein the first arc extinguishing chamber comprises a plurality of first grids arranged in a stacked manner and a first gap between the adjacent first grids, and the third arc extinguishing chamber comprises a plurality of third grids arranged in a stacked manner and a third gap between the adjacent third grids;

wherein at least a portion of the first void is in communication with the third void.

12. The arc extinguishing system of claim 3, wherein the first portion includes a first interior cavity in which the first arc chute is at least partially located, and the second portion includes a second interior cavity disposed to one side of the first through hole in a third direction, the second interior cavity being in communication with the first interior cavity and the second through hole, respectively.

13. The arc extinguishing system of claim 12, wherein the first arc extinguishing chamber comprises a plurality of first grids arranged in a stacked manner and first gaps located between adjacent first grids, and the fourth arc extinguishing sub-chamber comprises a plurality of fourth grids arranged in a stacked manner and fourth gaps located between adjacent fourth grids;

wherein at least a portion of the first grid extends to the second lumen, and at least a portion of the first void communicates with the fourth void.

14. The arc extinguishing system according to claim 1, wherein the first arc extinguishing chamber comprises a first sub arc extinguishing chamber and a second sub arc extinguishing chamber which are respectively arranged at two sides of the contact system along a first direction, and the arc blocking assembly comprises a first arc blocking piece arranged at one side of the first sub arc extinguishing chamber facing the contact system and a second arc blocking piece arranged at one side of the second sub arc extinguishing chamber facing the contact system;

wherein the first arc splitter comprises a first side wall facing the contact system, the second arc splitter comprises a second side wall facing the contact system, the first side wall is spaced apart from the second side wall and forms a second channel, and at least part of the arc moves into the second arc chute through the second channel.

15. The arc extinguishing system of claim 14, wherein at least one of the first arc chute and the second arc chute includes a gas generating material.

16. The arc extinguishing system of claim 1, wherein the first portion includes a plurality of outer walls surrounding an outer peripheral side of the first arc chute, the plurality of outer walls having a first opening facing the contact system;

wherein, including the third exhaust hole that runs through along self thickness direction on the outer wall.

17. The arc extinguishing system of claim 1, wherein the first arc extinguishing chamber comprises a plurality of first grids arranged in a stack, the first grids comprising a first edge facing the contact system, and a first arc guiding groove formed by the first edge being recessed inwards.

18. An electrical appliance switch, characterized in that it comprises a contact system and an arc extinguishing system according to any one of claims 1 to 17.

19. The electrical switch of claim 18, wherein the contact system includes a first movable contact and a second movable contact, the first movable contact including a first movable contact, the second movable contact including a second movable contact;

20. The electrical switch of claim 19, wherein the first movable contact includes a body portion and an arc striking portion disposed on at least one side of the body portion along the first direction, and an extension direction of the arc striking portion intersects with an extension direction of the body portion.

21. An appliance switch according to claim 18, further comprising a diverting means configured to be able to generate a magnetic field that at least partially overlaps with the path of movement of the arc, so that at least part of the arc is diverted to the first arc extinguishing chamber under the effect of the magnetic field.

22. Electrical appliance switch according to claim 21, characterized in that the transfer means comprise a permanent magnet, which is arranged on the side of the first arc chute facing away from the contact system in the first direction, or on at least one side of the contact system in a third direction, the first direction, the second direction and the third direction intersecting each other.