CN116844894A - Arc extinguishing system and electrical switch for electrical switches - Google Patents

Abstract

This application provides an arc extinguishing system for an electrical switch and an electrical switch. The electrical switch includes a contact system. The arc extinguishing system includes a first arc extinguishing chamber, a second arc extinguishing chamber and an arc isolation component. The first arc extinguishing chamber is along the first arc extinguishing chamber. One direction is provided on at least one side of the contact system; the second arc extinguishing chamber is provided on one side of the contact system along a second direction, and the first direction intersects with the second direction. The arc isolation component is arranged on at least one side of the contact system along the first direction. The arc isolation component includes a first part corresponding to the first arc extinguishing chamber, and a first gap formed by the first part being recessed along the first direction. The contact At least part of the arc generated by the system moves into the first arc extinguishing chamber through the first gap. The arc extinguishing system in the embodiment of the present application can meet the arc extinguishing needs under different current conditions and has strong versatility.

Description

Arc extinguishing system and electrical switch for electrical switches

Technical field

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

Background technique

During the operation of the switch, the voltage between the electric shocks causes the air medium to discharge, forming an arc. Therefore, in various electrical switches such as circuit breakers and contactors, arc extinguishing chambers are usually installed to extinguish arcs to ensure the safe operation of electrical equipment.

The arc extinguishing chamber is the core component in electrical switches, used to limit the spatial position of the arc and accelerate arc extinguishing. A common arc extinguishing chamber consists of arc extinguishing grids and side plates, and its arc extinguishing capacity is positively related to the number of grids and cross-sectional area. How to reasonably arrange the arc extinguishing chamber in a limited space to meet the needs of different arc sizes has become an important issue in current electrical switches.

Contents of the invention

Embodiments of the present application provide an arc extinguishing system for an electrical switch and an electrical switch, which can meet arc extinguishing needs under different current conditions.

In a first aspect, embodiments of the present application provide an arc extinguishing system for an electrical switch. The electrical switch includes a contact system. The arc extinguishing system includes: a first arc extinguishing chamber, a second arc extinguishing chamber and an arc isolation component. The first arc extinguishing chamber The arc chamber is arranged on at least one side of the contact system along the first direction; the second arc extinguishing chamber is arranged on one side of the contact system along the second direction, and the first direction intersects with the second direction.

The arc isolation component is arranged on at least one side of the contact system along the first direction. The arc isolation component includes a first part corresponding to the first arc extinguishing chamber, and a first gap formed by the first part being recessed along the first direction. The contact At least part of the arc generated by the system moves into the first arc extinguishing chamber through the first gap.

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

In some embodiments, the arc isolation component further includes a first insulating member disposed between the first through hole and the second through hole.

In some embodiments, the arc extinguishing system further includes a first arc starting member disposed on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, the first arc starting member includes a component stacked with the first arc extinguishing chamber. The first sub-section is provided, and the second sub-section is stacked with the fourth sub-arc extinguishing chamber, and the first direction, the second direction and the third direction intersect each other.

In some embodiments, the arc extinguishing system further includes a second insulating member. The second insulating member includes a first baffle provided along the third direction on the side of the third sub-arc extinguishing chamber facing the first arc igniting member. The plate is spaced apart from the first arc starting component.

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

Wherein, the first insulating plate and the connecting plate are sandwiched to form a first channel, and the first insulating plate has 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, and the second insulating plate is located on the second baffle toward the fourth sub-arc extinguishing chamber. On one side of the chamber, 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 starting member disposed on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along the third direction, the second arc starting member includes a second arc extinguishing member stacked with the first arc extinguishing chamber. The third sub-section is provided, and the fourth sub-section is stacked with the third sub-arc extinguishing chamber, and the first direction, the second direction and the third direction intersect each other.

In some embodiments, the first portion includes a first lumen and the first arc quenching chamber is at least partially located within the first lumen;

Wherein, the first notch communicates with the first through hole through the first inner cavity.

In some embodiments, the first arc extinguishing chamber includes a plurality of first grid sheets arranged in a stack and a first gap between adjacent first grid sheets, and the third arc extinguishing chamber includes a plurality of third grid sheets arranged in a stack. grid pieces and a third gap located between adjacent third grid pieces;

Wherein, at least part of the first gap is connected with the third gap.

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

In some embodiments, the first arc extinguishing chamber includes a plurality of stacked first grid pieces and first gaps between adjacent first grid pieces, and the fourth sub-arc extinguishing chamber includes a plurality of stacked fourth grid pieces. The grid pieces and the fourth gap located between the adjacent fourth grid pieces;

Wherein, at least part of the first grid extends to the second inner cavity, and at least part of the first gap communicates with the fourth gap.

In some embodiments, the first arc extinguishing chamber includes a first sub-arc extinguishing chamber and a second sub-arc extinguishing chamber respectively disposed on both sides of the contact system along the first direction, and the arc isolation component includes a first sub-arc extinguishing chamber disposed on both sides of the contact system. a first arc isolator on the side of the chamber facing the contact system, and a second arc isolator provided on the side of the second sub-arc extinguishing chamber facing the contact system;

Wherein, the first arc isolation member includes a first side wall facing the contact system, the second arc isolation member includes a second side wall facing the contact system, the first side wall and the second side wall are spaced apart and form a second channel. , at least part of the arc moves to the second arc extinguishing chamber through the second channel.

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

In some embodiments, the first part includes a plurality of outer walls surrounding the outer periphery of the first arc extinguishing chamber, and the plurality of outer walls have first openings facing the contact system;

Among them, the outer wall includes a third exhaust hole penetrating along its thickness direction.

In some embodiments, the first arc extinguishing chamber includes a plurality of first grid plates arranged in a stack, the first grid plates include a first edge facing the contact system, and a first arc strike formed by an inward recess of the first edge. groove.

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

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

Wherein, the first movable contact is located on a side of the second movable contact close to the second arc extinguishing chamber 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 part and an arc-starting part disposed on at least one side of the body part along the first direction, and the extension direction of the arc-start part intersects the extension direction of the body part.

In some embodiments, the electrical switch further includes a transfer device configured to generate a magnetic field that at least partially overlaps with the movement path of the arc, so that at least part of the arc is transferred to the first arc extinguishing chamber under the action of the magnetic field. .

In some embodiments, the transfer device includes a permanent magnet, which is disposed on a side of the first arc extinguishing chamber away from the contact system along a first direction, or is disposed on at least one side of the contact system along a third direction, and the first The direction, the second direction and the third direction intersect in pairs.

Embodiments of the present application provide an arc extinguishing system for an electrical switch and an electrical switch. The arc extinguishing system can meet the arc extinguishing needs under different current conditions. When the current is small, most of the arc will deflect away from the first plane along the first direction. And transferred to the first arc extinguishing chamber of the arc extinguishing system; when the current is large, most of the arc will enter the second arc extinguishing chamber along the second direction. Therefore, the arc extinguishing system in the embodiment of the present application can be applied to different environments and has strong versatility.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the drawings required to be used in the embodiments of the present application will be briefly introduced below. For those of ordinary skill in the art, without exerting creative efforts, they can also Additional drawings can be obtained from these drawings.

Figure 1 is a schematic cross-sectional structural diagram in the first plane when the electrical switch provided by the embodiment of the present application is turned off;

Figure 2 is a schematic cross-sectional structural diagram in the first plane when the electrical switch provided by the embodiment of the present application is closed;

Figure 3 is a schematic structural diagram of the electrical switch shown in Figure 1 from another perspective;

Figure 4 is a schematic structural diagram of an arc extinguishing system in an electrical switch provided by an embodiment of the present application;

Figure 5 is a schematic diagram of the cooperation structure of the contact system and the arc extinguishing system in the electrical switch provided by the embodiment of the present application;

Figure 6 is a schematic diagram of another cooperative structure of the contact system and the arc extinguishing system in the electrical switch provided by the embodiment of the present application;

Figure 7 is another structural schematic diagram of the arc extinguishing system in the electrical switch provided by the embodiment of the present application;

Figure 8 is a schematic structural diagram of the arc spacer component in Figure 7;

Figure 9 is a schematic diagram of yet another matching structure of the contact system and the arc extinguishing system in the electrical switch provided by the embodiment of the present application;

Figure 10 is a schematic diagram of the matching structure of the second arc extinguishing chamber and the first arc starting component in the electrical switch provided by the embodiment of the present application;

Figure 11 is a schematic diagram of the matching structure of the second insulating member and the second arc starting member in the electrical switch provided by the embodiment of the present application;

Figure 12 is another structural schematic diagram of the arc extinguishing system in the electrical switch provided by the embodiment of the present application;

Figure 13 is a schematic diagram of an arc path of the electrical switch provided by the embodiment of the present application;

Figure 14 is a schematic diagram of an arc path of the electrical switch provided by the embodiment of the present application;

Figure 15 is another structural schematic diagram of an arc isolation component in an electrical switch provided by an embodiment of the present application;

Figure 16 is a schematic diagram of an arc path of the electrical switch provided by the embodiment of the present application;

Figure 17 is another structural schematic diagram of the arc extinguishing system in the electrical switch provided by the embodiment of the present application;

Figure 18 is a schematic structural diagram of the contact system in the electrical switch provided by the embodiment of the present application;

Figure 19 is another structural schematic diagram of the electrical switch provided by the embodiment of the present application;

Figure 20 is another structural schematic diagram of the electrical switch provided by the embodiment of the present application.

Tag description:

1. The first arc extinguishing chamber; 11. The first sub-arc extinguishing chamber; 12. The second sub-arc extinguishing chamber; 13. The first grid piece; 131. The first arc ignition slot; 14. The first gap;

2. The second arc-extinguishing chamber; 21. The third sub-arc-extinguishing chamber; 211. The third grid piece; 212. The third gap; 22. The fourth sub-arc-extinguishing chamber; 221. The fourth grid piece; 222. The fourth gap;

3. Contact system; 31. First moving contact; 311. First moving contact; 312. Body part; 313. Arc striking part; 32. First static contact; 33. Second moving contact; 331 , the second moving contact;

4. Arc isolation component; 41. First part; 411. First gap; 412. First inner cavity; 413. Side baffle; 414. Outer wall; 4141. Third exhaust hole; 42. Second part; 421. First through hole; 422, second inner cavity; 43, third part; 431, second through hole; 44, first insulating member; 4a, first arc isolation member; 4a1, first side wall; 4b, third Two arc partitions; 4b1, second side wall;

51. The first arc starting part; 511. The first part; 512. The second part; 52. The second arc starting part; 521. The third part; 522. The fourth part; 53. The third arc starting part pieces;

6. Second insulating piece; 61. First baffle; 62. Second baffle; 63. Third baffle; 64. Connecting plate; 65. First insulating plate; 651. First exhaust hole; 66. Guide structure; 67. Second insulation plate; 671. Second exhaust hole;

7. Transfer device; 71. Permanent magnet;

A. First plane; B. First channel; C. Second channel;

X, first direction; Y, second direction; Z, third direction.

Detailed ways

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only intended to explain the application, but not to limit the application. 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 embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations are mutually exclusive. any such actual relationship or sequence exists between them. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprising..." does not exclude the presence of additional identical elements in a process, method, article, or device that includes the stated element.

Direct current is different from alternating current. Alternating current will cross zero twice in one cycle, which is the most favorable arc extinguishing condition. DC itself does not have a natural zero-crossing moment, so DC electrical switches can only achieve arc extinguishing by establishing sufficient arc voltage. Generally, electrical switches use the magnetic blowing effect generated by the self-excitation of the loop current to drive the arc movement. In addition, when the breaking current is large, the high temperature generated by the arc will form a high-voltage area and will also drive the arc to extend to the low-voltage area. However, the effects of magnetic blowing and gas flow under low current are very weak, and the arc moves slowly or cannot move into the arc extinguishing chamber, causing the switching time of the electrical switch to become very long and unstable. The high temperature of the arc staying for a long time will cause the insulating material to be seriously damaged or the contacts to be severely ablated and welded, causing the electrical switch to fail to operate normally. Therefore, there is an urgent need for an arc extinguishing system that can meet the arc extinguishing requirements under both large and small 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 needs under different current conditions. It should be noted that the electrical switches mentioned in the embodiments of this application include, but are not limited to, circuit breakers and contactors.

Please refer to Figures 1 to 3. The electrical switch includes a contact system 3. The contact system 3 includes a correspondingly arranged first movable contact 311 and a first stationary contact 32. The first movable contact 311 and the first stationary contact The points 32 are all located in the first plane A, and the first movable contact 311 is configured to move in the first plane A to achieve contact or separation of the first stationary contact 32 .

The arc extinguishing system includes 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 the first direction X, and the second arc extinguishing chamber 2 is arranged along the second direction X. Y is disposed on one side of the contact system 3, and the first direction X and the second direction Y intersect.

When the electrical switch remains connected, the first movable contact 311 and the second movable contact 331 are in contact, and the current inside the electrical switch is conducted; when the electrical switch is manually disconnected or automatically triggered to disconnect due to a fault, the first movable contact The contact 311 will move relatively in the first plane A, leaving and gradually moving away from the first stationary contact 32. During this process, an arc will be generated between the first movable contact 311 and the first stationary contact 32, and due to Depending on the size of the current inside the electrical switch, the arc generated by the contact system 3 will be transferred to the first arc extinguishing chamber 1 or the second arc extinguishing chamber 2 . Among them, the first plane A is represented by a dotted line in FIG. 3 .

Specifically, the first arc extinguishing chamber 1 is mainly used to interrupt arcs generated under small current conditions. The first arc extinguishing chamber 1 is arranged on at least one side of the first plane A along the first direction X. The first direction X is the direction intersecting the first plane A. Optionally, the first direction X is perpendicular to the first plane A. . When the internal current of the electrical switch is small, the arc generated by the contact system 3 is small. At this time, under the influence of the magnetic field and the Lorentz force generated by the current, the arc will pass out from the first plane A and transfer to the second plane A. In an arc extinguishing chamber 1, the arc extinguishing effect under small current conditions is achieved.

The second arc extinguishing chamber 2 is mainly used to break the arc generated under high current conditions. The second arc extinguishing chamber 2 is arranged on one side of the first movable contact 311 along the second direction Y, and the second direction Y is parallel to the first plane. A, that is, the second direction Y intersects the first direction X. Optionally, the first direction X is perpendicular to the second direction Y. When the internal current of the electrical switch is large, the arc generated by the contact system 3 is large. At this time, most of the arc and high-temperature gas will move upward along the second direction Y into the second arc extinguishing chamber 2 to extinguish the high-current arc. Effect.

It should be noted that under high current conditions, not all arcs will enter the second arc extinguishing chamber 2 along the second direction Y, and some arcs and high-temperature gases will also be deflected along the first direction X and enter the first arc extinguishing chamber 2 . In the arc extinguishing chamber 1, a small part of the arc entering the first arc extinguishing chamber 1 cannot be maintained and is quickly extinguished. Therefore, in the case of large current, the first arc extinguishing chamber 1 can also play a role in assisting in extinguishing the arc.

The arc extinguishing system in the embodiment of the present application can meet the arc extinguishing needs under different current conditions. When the current is small, most of the arc will deflect away from the first plane A along the first direction X and transfer to the first extinguishing point of the arc extinguishing system. In the arc chamber 1; when the current is large, most of the arc will enter the second arc extinguishing chamber 2 along the second direction Y. Therefore, the arc extinguishing system in the embodiment of the present application can be applied to different environments and has strong versatility.

In some embodiments, please refer to FIGS. 1 to 4 , the first arc extinguishing chamber 1 includes a first sub-arc extinguishing chamber 11 and a second sub-arc extinguishing chamber 12 respectively located on both sides of the first plane A.

The first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 are respectively located on both 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 arranged on the contact surface along the first direction X. Both sides of the head system 3 , specifically, the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 are distributed on both sides of the first movable contact 311 along the first direction X.

Under the action of external forces such as the Lorentz force, the arc generated by the contact system 3 will deflect along the first direction X and leave the first plane A to enter the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12 Inside. It can be understood that the direction of the current in the electrical switch determines the direction of the Lorentz force. If the direction of the current changes, the direction of the Lorentz force will also change. Assume that when the electrical switch is turned off under normal circumstances, the arc generated by the contact system 3 will transfer toward the first sub-arc extinguishing chamber 11 under the action of Lorentz force; and when the direction of the current inside the electrical switch changes, the contact system 3 arc generated

Then it will move towards the second arc extinguishing chamber 12 under the action of Lorentz force.

The first arc extinguishing chamber 1 in the embodiment of the present application includes a first sub-arc extinguishing chamber 11 and a second sub-arc extinguishing chamber 12 located on both sides of the first plane A, which can ensure that the arc can operate under different current directions. Transferred to the first arc extinguishing chamber 1 to improve the versatility of the arc extinguishing system and the reliability of the first arc extinguishing chamber 1 .

In some embodiments, please refer to FIGS. 4 and 5 , at least one of the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 includes a plurality of first grid sheets 13 arranged in a stack. 13 includes a first edge close to the first plane A, and a first arc groove 131 formed by an inward depression of the first edge.

Both the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 include a plurality of first grid sheets 13. The first grid sheets 13 have the function of enhancing cooling, that is, surface recombination. The stacked arrangement of the plurality of first grid sheets 13 can The entire arc is cut into multiple short arcs, thereby increasing the initial dielectric strength of the arc gap. Optionally, the first grid piece 13 has a plate-like structure, and its material can be copper, ferromagnetic, ceramic, etc.

A first arc-starting groove 131 is provided on the first grid plate 13 . The first arc-starting groove 131 is provided on the first edge of the first grid plate 13 close to the contact system 3 . The opening of the first arc-starting groove 131 faces the contact. System 3. Under the action of the magnetic field, the arc can be deflected along a specific route to the depth of the first arc ignition slot 131 and then completely enter the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12 .

In the embodiment of the present application, a first arc-starting groove 131 is provided on the first grid plate 13 to assist the arc to move to the depth of the first arc-starting groove 131 under the action of the magnetic field, so that the arc can be better transferred to the first arc-starting groove 131 . In the sub arc extinguishing chamber 11 or the second sub arc extinguishing chamber 12, the reliability of use of the first sub arc extinguishing chamber 11 and the second sub arc extinguishing chamber 12 is enhanced.

In some embodiments, please refer to FIGS. 1 and 5 together. The contact system 3 includes a first movable contact 31 . The first movable contact 31 includes a body part 312 and at least one part disposed on the body part 312 along the first direction X. On one side of the arc striking portion 313 , the extending direction of the arc striking portion 313 intersects with the extending direction of the main body portion 312 and points toward the first arc striking groove 131 .

The first movable contact 311 is located on the first movable contact 31. The arc generated by the separation of the first movable contact 311 and the first stationary contact 32 is located between the first movable contact 311 and the first stationary contact 32. The arc starting portion 313 on the first movable contact 31 is used to transfer the arc located at one end of the first movable contact 31 to 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 moves relatively in the first plane A, the arc located at the first movable contact 31 has a shape in the first plane Moving trend within A. In order to make it easier for the arc to leave the first plane A and transfer to the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12, the embodiment of the present application adds an arc starting part 313. The arc starting part 313 is driven by the first moving arc extinguishing chamber. One end of the contact 31 extends and is gradually disposed close to the first arc striking slot 131 , that is, the arc striking portion 313 extends away from the first plane A relative to the body portion 312 , so that under the action of the magnetic field, the arc will pass through the arc striking portion 313 Rotate into the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12 .

Optionally, the number of the arc-starting parts 313 is two and they are arranged symmetrically with respect to the first plane A. One of the arc-starting parts 313 points to the first sub-arc extinguishing chamber 11 and the other arc-starting part 313 points to the second sub-arc-extinguishing chamber. 12.

In addition, please refer to Figure 6. This embodiment of the present application also provides another structure of the first movable contact 31. In the embodiment of the present application, the first movable contact 31 is composed of a plurality of contact pieces, and the arc striking portion 313 is located on the two outermost contact pieces, and the first moving contact 311 is located on the central contact piece.

In some embodiments, the arc starting portion 313 has a tendency to approach the second arc extinguishing chamber 2 in a direction away from the body portion 312; and/or the first arc starting groove 131 has a tendency to approach the second arc extinguishing chamber 2 in a direction away from the first plane A. The trend of the second interrupter 2.

It can be understood that the arc generated at the first movable contact 31 will have a direction along the second direction Y toward the second arc extinguishing chamber 2 under the joint influence of the movement tendency of the first movable contact 31 and the air blowing effect. Moving trends. In order to meet the needs of actual situations, the embodiment of the present application sets at least one of the arc starting portion 313 and the first arc starting slot 131 to have a tendency to extend in a direction closer to the second arc extinguishing chamber 2, so that the arc can more easily pass through the starting arc. The arc portion 313 is transferred to the first arc groove 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.

It can be seen from the foregoing that when the direction of the current in the electrical switch changes, the arc moving direction will also change. Normally, when the current magnitude is constant and the current direction is opposite, the moving direction of the arc will be a mirror image relative to the first plane A. Therefore, in the embodiment of the present application, the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12 are arranged symmetrically with respect to the first plane A, so as to meet the needs of arc transfer and also contribute to the structural design of the arc extinguishing system and the first Manufacturing of the sub-arc-extinguishing chamber 11 and the second sub-arc-extinguishing chamber 12,

In some embodiments, please refer to Figures 1, 7 and 8. The arc extinguishing chamber system also includes an arc isolation component 4. The arc isolation component 4 is disposed on at least one side of the contact system 3 along the first direction X. The arc isolation component 4 The assembly 4 includes a first part 41 corresponding to the first arc extinguishing chamber 1, and a first gap 411 formed by the first part 41 being recessed along the first direction X. At least part of the arc generated by the contact system 3 moves through the first gap 411 to Inside the first arc extinguishing chamber 1.

The arc isolation component 4 is correspondingly disposed between the first arc extinguishing chamber 1 and the contact system 3. The arc generated by the contact system 3 will not be directly transferred to the first arc extinguishing chamber 1, but will pass through the third arc isolation component 4. A gap 411 is transferred into the first arc extinguishing chamber 1 . Specifically, the setting of the first gap 411 needs to be determined according to the direction of the magnetic field. Under the action of the magnetic field, part of the arc generated by the contact system 3 will be oriented and transferred to the first gap 411 and reach the first arc extinguishing chamber 1. Therefore, The setting of the first gap 411 can ensure that the arc enters a specific area of the first arc extinguishing chamber 1 and then continues to move along a specific path, ensuring the reliability of the arc extinguishing process of the first arc extinguishing chamber 1 . The size and specific position relationship of the first notch 411 need to be determined according to the actual situation, and the embodiment of the present application does not limit this.

In some embodiments, the arc isolating assembly 4 includes a first arc isolating member 4a disposed on the side of the first sub-arc extinguishing chamber 11 facing the contact system 3 along the first direction The second arc isolating member 4b faces the side of the arc extinguishing chamber system; wherein, the first arc isolating member 4a includes a first side wall 4a1 facing the contact system 3, and the second arc isolating member 4b includes a first side wall 4a1 facing the contact system 3. The first side wall 4a1 and the second side wall 4b1 are spaced apart to form a second channel C. At least part of the arc generated by the contact system 3 moves to the second arc extinguishing chamber 2 through the second channel C.

The first arc isolating part 4a is provided correspondingly to the first sub-arc extinguishing chamber 11, and the second arc isolating part 4b is provided correspondingly to the second sub-arc-extinguishing chamber 12. Corresponding to the first part 41 and the first notch 411 , the second arc isolating member 4b includes the first part 41 and the first notch 411 corresponding to the second sub-arc extinguishing chamber 12 . The arc is transferred to the first sub-arc extinguishing chamber 11 through the first notch 411 of the first arc isolating member 4a, and is transferred to the second sub-arc extinguishing chamber 12 through the first notch 411 of the second arc isolating member 4b. The shape and size of the first arc-isolating member 4a and the second arc-isolating member 4b may be the same or different, and the embodiment of the present application does not limit this. Optionally, the first arc-insulating member 4a and the second arc-insulating member 4b are symmetrically distributed on both sides of the first plane A.

The first side wall 4a1 is the surface of the first arc isolation member 4a facing the contact system 3, that is, the surface away from the first sub-arc extinguishing chamber 11; the second side wall 4b1 is the surface of the second arc isolation member 4b facing the contact system 3. surface, that is, the surface away from the second sub-arc extinguishing chamber 12 . The first side wall 4a1 and the second side wall 4b1 are spaced apart to form a second channel C. The second channel C is connected to the second arc extinguishing chamber 2 . When the current value in the electrical switch is relatively large, the arc generated by the contact system 3 can be transferred to the second arc extinguishing chamber 2 through the second channel C to meet the needs of large current situations.

It should be noted that, in addition to transferring the high-current arc to the second arc extinguishing chamber 2 , the second channel C can also transport part of the air flow to the second arc extinguishing chamber 2 and remove the electrical switch through the second arc extinguishing chamber 2 internal. Specifically, the arc is generated from the first movable contact 311 and the first stationary contact 32 in the contact system 3. Due to the influence of factors such as arc, a high-voltage environment is easily formed near this location, while the second arc extinguishing chamber 2 is relatively Create a low pressure environment. Therefore, under the influence of pressure, the air flow will be transferred to the second arc extinguishing chamber 2 through the second channel C.

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

The arc isolation assembly 4 includes a first part 41 and a second part 42. The second part 42 is located on the side of the first part 41 close to the third sub-arc extinguishing chamber 21 along the second direction Y. The second part 42 is connected to the third sub-arc extinguishing chamber. 21 will overlap in the second direction Y, so in order to ensure the arrangement of the third sub-arc extinguishing chamber 21, the embodiment of the present application is provided with a first through hole 421 in the second part 42, and the first through hole 421 is used to avoid The third arc extinguishing chamber. At the same time, the third sub-arc extinguishing chamber 21 can be disposed through the first through hole 421. This design can increase the size of the third sub-arc extinguishing chamber 21 in the first direction X and improve the arc extinguishing performance of the third sub-arc extinguishing chamber 21. reliability. Optionally, the first part 41 and the second part 42 have an integrated structure.

In addition, the third sub-arc extinguishing chamber 21 is connected to the first through hole 421, and the first through hole 421 is connected to the second channel C. The arc generated by the contact system 3 can directly enter the third sub-arc extinguishing chamber 21 through the second channel C. Inside the arc 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 Figure 1; it may also include a second arc-extinguishing chamber as shown in Figure 9. The arc extinguishing chamber 2 only includes a third sub-arc extinguishing chamber 21, which is not limited in the embodiment of the present application.

In some embodiments, as shown in FIGS. 1 , 7 and 8 , the second arc extinguishing chamber 2 further includes a fourth sub-arc extinguishing chamber 2 located on the side of the third sub-arc extinguishing chamber 21 away from the contact system 3 along the second direction Y. The arc extinguishing chamber 22 and the arc isolation assembly 4 include a third part 43 arranged on the side of the second part 42 away from the first part 41 along the second direction Y, and a second passage formed by the third part 43 penetrating along the first direction X. Hole 431, the fourth sub-arc extinguishing chamber 22 is at least partially located in the second through hole 431.

The second arc extinguishing chamber 2 includes a third sub-arc extinguishing chamber 21 and a fourth sub-arc extinguishing chamber 22. This design can increase the number of grids in the second arc extinguishing chamber 2 and improve the efficiency of the second arc extinguishing chamber 2. arc effect. At the same time, the arc isolation assembly 4 also includes a third part 43 corresponding to the fourth sub-arc extinguishing chamber 22, and a second through hole 431 located in the third part 43. The second through hole 431 is used to avoid 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. It should be noted that the implementation of this application does not impose any restrictions on the positional relationship between the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22 in the first direction X.

Optionally, the arc extinguishing system also includes a third arc starting member 53. One end of the third arc starting member 53 is stacked with the third sub-arc extinguishing chamber 21, and the other end is stacked with the fourth sub-arc extinguishing chamber 22, located in the middle. The connecting section is used to connect the two ends of the third arc starting part 53. The third arc starting part 53 is used to realize the arc series connection between the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22, which is suitable for high current arc. Conditions of Use.

In some embodiments, as shown in FIGS. 7 and 8 , the arc isolation component 4 further includes a first insulating member 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 . between. The first insulator 44 is provided to insulate part of the space between the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22 to prevent backside breakdown and reduce the risk of the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22. The risk of breakdown of the space between the arc chambers 22 will prevent the arc from passing through some of the grids in the third sub-arc extinguishing chamber 21 and affect the arc extinguishing effect of the second arc extinguishing chamber 2 .

In addition, when there is a third arc starting member 53, the first insulating member 44 is used to insulate the connection section between the third sub-arc extinguishing chamber 21 and the third arc starting member 53 to prevent the arc from being extinguished directly from the third sub-arc extinguishing chamber 21. The arc chamber 21 is transferred to the connecting section of the third arc starting component 53 . It should be noted that the insulation between the third sub-arc extinguishing chamber 21 and the connecting section of the third arc starting component 53 mentioned in the embodiment of the present application is to prevent the arc from being directly transferred to the connecting section of the third arc starting component 53 , so that the arc in the third sub-arc extinguishing chamber 21 can only pass through one end of the third arc starting component 53 and the third sub-arc extinguishing chamber 21 which is stacked, and be transferred to the fourth sub-extinguishing component along the extension direction of the third arc starting component 53 In the arc chamber 22, it is ensured that the arc is transferred from the third sub-arc extinguishing chamber 21 to the fourth sub-arc extinguishing chamber 22 along a specific path.

In some embodiments, the height of the first through hole 421 in the third direction Z is less 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. .

The third direction Z can be the stacking direction of the first grid plates 13 in the first arc extinguishing chamber 1, and can also be the stacking direction of the grid plates in the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 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 to place the third sub-arc extinguishing chamber 21 , and the second through hole 431 is used to place 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 21. Arrangement height of arc 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 is smaller than the third sub arc extinguishing chamber 22 . The arc chamber 21 can obtain a larger layout space, and the height and arc extinguishing capability of the fourth sub-arc extinguishing chamber 22 can be improved.

In some embodiments, please refer to Figures 7 and 10. The arc extinguishing system also includes a first arc starting component 51 disposed on one side of the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2 along the third direction Z. An arc starting component 51 includes a first sub-section 511 stacked with the first arc extinguishing chamber 1 and a second sub-section 512 stacked with the fourth sub-arc extinguishing chamber 22 .

The first arc starting 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 becomes the arc starting grid piece of the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22 . At the same time, the first arc starting component 51 can be electrically connected to the first static contact 32 , and the arc on the first static contact 32 can be transferred to the first arc extinguishing chamber 1 or the fourth sub-arc extinguishing chamber through the first arc starting component 51 22, that is, both the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22 can extinguish the arc on the first static contact 32, thereby improving 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, in order to simultaneously meet the arc ignition needs of the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 12. , the number of the first arc starting parts 51 can be set to one or two. Specifically, the number of the first arc-starting parts 51 may be two. The two first arc-starting parts 51 are arranged side by side in the first direction 11 and the second sub-arc extinguishing chamber 12 are arranged correspondingly; or as shown in Figure 10, there is only one first arc starting member 51, and a single first arc starting member 51 can cover the first sub-arc extinguishing chamber 11 and the second sub-arc extinguishing chamber 11 at the same time. The arc extinguishing chamber 12 , that is, the single first arc ignition component 51 simultaneously becomes the arc ignition grid piece 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 block disposed along the third direction Z on the side of the third sub-arc extinguishing chamber 21 facing the first arc starting member 51 . The plate 61 , the first baffle 61 and the first arc starting member 51 are arranged at intervals.

The second insulating member 6 is mainly used to achieve partial insulation between the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22 , so that the arc on the third sub-arc extinguishing chamber 21 can only rely on the third arc starting member 53 It is transferred to the fourth sub-arc extinguishing chamber 22 to improve the cooperation reliability of the third sub-arc extinguishing chamber 21 and the fourth sub-arc extinguishing chamber 22 .

In the embodiment of the present application, a first baffle 61 is provided on the side of the second insulating member 6 close to the first arc starting member 51. The first baffle 61 can be stacked with the grid in the third sub-arc extinguishing chamber 21. . The first baffle 61 is spaced apart from the first arc starting part 51. This design can insulate the third sub-arc extinguishing chamber 21 from the first arc starting part 51 to prevent the arc from passing through the first static contact 32. The first arc starting component 51 is transferred to the third arc extinguishing chamber 21 . At the same time, the space between the first baffle 61 and the first arc starting member 51 can be partially grated, and the gratings in the first arc extinguishing chamber 1 or the fourth sub-arc extinguishing chamber 22 can extend to the first baffle 61 and the third arc extinguishing chamber. between an arc starting piece 51.

In some optional embodiments, part of the first grid 13 in the first arc extinguishing chamber 1 extends from the first part 41 of the arc isolation assembly 4 to between the first baffle 61 and the first arc starting member 51 , that is, extends To the second part 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 non-magnetic material, including but not limited to copper and ceramics. This design can prevent the arc in the first arc extinguishing chamber 1 from being transferred to the fourth sub-arc extinguishing chamber 22 .

For example, as shown in FIG. 10 , the second insulating member 6 may also include a third baffle 63 disposed along the third direction Z on the side of the third sub-arc extinguishing chamber 21 away from the first arc starting member 51 . The baffle 61 and the third baffle 63 are stacked with the grid in the third sub-arc extinguishing chamber 21. The third sub-arc extinguishing chamber 21 is used to insulate and separate the third sub-arc extinguishing chamber 21 from the inner wall of the electrical switch. This prevents the arc from moving to the inner wall through the third sub-arc extinguishing chamber 21 and causing damage to the inner wall of the electrical switch.

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

The second baffle 62 is disposed on the side of the fourth sub-arc extinguishing chamber 22 away from the first arc starting member 51. The second baffle 62 can also insulate and separate the fourth sub-arc extinguishing chamber 22 from the inner wall of the electrical switch. The effect is to prevent the arc from moving to the inner wall through the fourth sub-arc extinguishing chamber 22 to cause damage. The first baffle 61 and the second baffle 62 are connected through a connecting plate 64. In the direction approaching the second baffle 62 along the second direction Y, the connecting plate 64 has a direction away from the first arc starting member along the third direction Z. The trend is tilted in the direction of 51.

The connecting section of the third arc starting part 53 is located on the side of the connecting plate 64 away from the third arc extinguishing chamber. The connecting plate 64 can reduce the arc in the third sub-arc extinguishing chamber 21 and directly transfer to the connecting section of the third arc starting part 53 At the same time, the side of the connecting plate 64 facing the third sub-arc extinguishing chamber 21 is also provided with a first insulating plate 65. The first insulating plate 65 further enhances the safety of the third sub-arc extinguishing chamber 21 and the third arc starting member 53. Insulating effect between connecting segments.

In addition, in the embodiment of the present application, a first exhaust hole 651 is opened in the first insulating plate 65, and the high-temperature airflow generated by the third sub-arc extinguishing chamber 21 or flowing through the third sub-arc extinguishing chamber 21 can pass through the first row. The air hole 651 exits the third sub-arc extinguishing chamber 21 . At the same time, the first insulating plate 65 and the connecting plate 64 are sandwiched to form a first channel B. The high-temperature airflow leaving the third sub-arc extinguishing chamber 21 moves into the first channel B, and then moves to the second baffle 62 away from the fourth sub-extinguishing chamber. One side of the arc chamber 22 and ultimately discharges the arc extinguishing system.

Optionally, the first insulating plate 65 extends along the third direction Z, and the connecting plate 64 is inclined relative to the first insulating plate 65 , that is, the extending direction of the first insulating plate 65 is in line with the direction of the grid plate in the third sub-arc extinguishing chamber 21 . The stacking direction is the same, and this design is more conducive to releasing the high-temperature airflow in the third sub-arc extinguishing chamber 21.

In some embodiments, the side of the connecting plate 64 and the second baffle 62 away from the first arc starting member 51 protrudes to form a guide structure 66 . The guide structure 66 is used to guide the airflow while adjusting the third sub-arc extinguishing chamber. 21 exhaust area.

In some embodiments, the arc extinguishing system further includes a second insulating plate 67 disposed on the 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 the second baffle 62 toward the third sub-arc extinguishing chamber 21 . On one side of the fourth arc extinguishing chamber 22, 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 rear of the second arc extinguishing chamber 2 and plays the role of insulation protection. At the same time, a second exhaust hole 671 is provided on the second insulating plate 67 , and the high-temperature airflow 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 extended and shaped along the third direction Z, and the orthographic projection of the fourth sub-arc extinguishing chamber 22 on the second insulating plate 67 is located within the outer contour of the second insulating plate 67 so that the second insulating The plate 67 can cover the entire fourth sub-arc extinguishing chamber 22 .

In some embodiments, please refer to Figure 12, the arc extinguishing system also includes a second arc starting 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. The component 52 includes a third sub-section 521 stacked with the first arc extinguishing chamber 1 and a fourth sub-section 522 stacked with the third sub-arc extinguishing chamber 21 .

The first arc starting member 51 and the second arc starting member 52 are respectively located on both sides of the first arc extinguishing chamber 1 in the third direction Z. One end of the second arc starting member 52 is located where the first movable contact 31 can be deflected. At the farthest position from the first stationary contact 32, the arc on the first movable contact 31 can be transferred to the first arc extinguishing chamber 1 and the third sub-arc extinguishing chamber 21 through the second arc starting component 52, and is connected with the first arc extinguishing chamber 1 and the third sub-arc extinguishing chamber 21. The same thing as the arc starting member 51 is that the number of the second arc starting member 52 can also be one or two, which will not be described again in the embodiment of this application.

Please refer to Figures 13 and 14. Figure 13 is a schematic diagram of arc formation under low current conditions, and Figure 14 is a schematic diagram of arc formation under high current conditions. The direction of the arrow in the figure is the moving path of the arc. In FIG. 13 , since the internal current of the electrical switch is small, the generated arc can be directly transferred to the first arc extinguishing chamber 1 through the first movable contact 31 . In FIG. 14 , since the current inside the electrical switch is relatively large, most of the generated current will be transferred to the second arc starting member 52 through the first movable contact 31 , and then transferred to the third arc starting member 52 through the second arc starting member 52 . In the arc extinguishing chamber 21, 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 through the extension direction of the third arc starting member 53. In the chamber 22, the arc extinguishing effect is achieved.

In some embodiments, please refer to Figures 7 and 15, the first portion 41 includes a first inner cavity 412, and the first arc extinguishing chamber 1 is at least partially located in the first inner cavity 412; wherein the first gap 411 passes through the first inner cavity 412. The cavity 412 is connected with the first through hole 421 .

The first arc extinguishing chamber 1 may include a first sub-arc extinguishing chamber 11 and a second sub-arc extinguishing chamber 12. Similarly, the first arc isolating member 4a and the second arc isolating member 4b may respectively include the first sub-arc extinguishing chamber 11 and the second arc extinguishing chamber 12. There are two first inner cavities 412 corresponding to the second sub-arc extinguishing chamber 12. The opening of the first inner cavity 412 corresponding to the first sub-arc extinguishing chamber 11 is arranged away from the second sub-arc extinguishing chamber 12 along the first direction X, and The opening of the first inner cavity 412 corresponding to the second sub-arc extinguishing chamber 12 is arranged away from the first sub-arc extinguishing chamber 11 along the first direction X. Optionally, a mounting slot is provided in the first inner cavity 412 for installing the grid plates in the first sub-arc extinguishing chamber 11 or the second sub-arc extinguishing chamber 12 .

The first notch 411 is connected to the first through hole 421 through the first inner cavity 412. The first through hole 421 is used to set the third sub-arc extinguishing chamber 21. The communication between the first inner cavity 412 and the first through hole 421 can realize the third arc extinguishing chamber 21. The connection between the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2 causes part of the high-temperature airflow in the first arc extinguishing chamber 1 to be transferred to the third sub-arc extinguishing chamber 21 and leave the arc extinguishing system through the first channel B.

In some embodiments, the first part 41 further includes a side baffle 413 located on the side of the first inner cavity 412 away from the second arc extinguishing chamber 2 along the second direction Y. The side baffle 413 is provided to ensure access to the first arc extinguishing chamber 2 . The high-temperature airflow in the arc extinguishing chamber 1 will not flow back into the contact system 3, thereby improving the reliability of the contact system 3. At the same time, the gas accumulated at the side baffle 413 can form a high-pressure environment, thereby facilitating the movement of the gas flow into the second arc extinguishing chamber 2 .

In some embodiments, the first arc extinguishing chamber 1 includes stacked first grid plates 13 and first gaps 14 between adjacent first grid plates 13 , and the third sub-arc extinguishing chamber 21 includes a plurality of stacked arc extinguishing chambers 13 . The third grid piece 211 and the third gap 212 located between the adjacent third grid pieces 211; wherein, at least part of the first gap 14 is connected with the third gap 212.

The connection between the first gap 14 and the third gap 212 helps to transfer the high-temperature air flow in the first arc extinguishing chamber 1 to the third sub-arc extinguishing chamber 21, improves the gas conduction capability, and avoids the air flow in the first arc extinguishing chamber 21. Accumulated in arc chamber 1.

In some embodiments, as shown in FIGS. 7 and 15 , the second part 42 includes a second inner cavity 422 disposed on one side of the first through hole 421 along the third direction Z. The second inner cavity 422 is respectively connected with the first through hole 421 . The inner cavity 412 and the second through hole 431 are connected.

It can be seen from the foregoing that the second through hole 431 is used to set the fourth sub-arc extinguishing chamber 22, and the arrangement of the second inner cavity 422 can realize the communication between the first arc extinguishing chamber 1 and the fourth sub-arc extinguishing chamber 22, so that The high-temperature airflow in the first arc-extinguishing chamber 1 can be transmitted to 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 extinguishing chamber 22 includes a plurality of stacked fourth grid sheets 221 and fourth gaps 222 located between adjacent fourth grid sheets 221; wherein at least part of the first grid sheets 13 Extending to the second inner cavity 422, at least part of the first gap 14 is connected with the fourth gap 222.

The connection between the first gap 14 and the fourth gap 222 helps to transfer the high-temperature air flow in the first arc extinguishing chamber 1 to the third sub-arc extinguishing chamber 21, improves the gas conduction capability, and avoids the air flow in the first arc extinguishing chamber 21. Accumulated in room 1.

In the arc extinguishing system provided by the embodiment of the present application, as shown in Figure 16, the transfer process of the high-temperature air flow in the arc extinguishing system can have three situations. In the first case, the high-temperature airflow can be transferred to the second arc extinguishing chamber 2 through the second channel C formed between the first arc isolating member 4a and the second arc isolating member 4b, and then passes through the second arc extinguishing chamber 2 Transfer away from the arc extinguishing system. In the second case, the high-temperature gas flow can enter the first arc extinguishing chamber 1 through the first gap 411, then be transferred to the third sub-arc extinguishing chamber 21 through the first inner cavity 412, and leave through the first channel B. Arc extinguishing system. In the third case, the high-temperature gas flow can enter the first arc extinguishing chamber 1 through the first gap 411, and then be transferred to the second inner cavity 422 through the first inner cavity 412, and then transferred to the second inner cavity 422 through the second inner cavity 422. In the fourth sub-arc extinguishing chamber 22, it finally leaves 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 isolation member 4a and the second arc isolation member 4b includes a gas generating material.

The gas-generating material can generate gas under specific conditions. During the arc extinguishing operation of the arc extinguishing system, the first arc isolating member 4a or the second arc isolating member 4b generates gas, thereby assisting the movement of the arc and acting as a gas barrier to the arc. Blowing effect. Specifically, the gas generated by the first arc isolating member 4a and the second arc isolating member 4b can form a certain high-pressure environment near the second channel C near the first arc extinguishing chamber 1. Under the combined effect of magnetic blowing and strong air pressure, , the arc can tend to move toward 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, please refer to FIG. 17 , the first part 41 includes a plurality of outer walls 414 surrounding the outer peripheral side of the first arc extinguishing chamber 1 , and the plurality of outer walls 414 have first openings facing the contact system 3 ; wherein, the outer walls 414 includes a third exhaust hole 4141 penetrating along its thickness direction.

In the embodiment of the present application, the first arc extinguishing chamber 1 and the second arc extinguishing chamber 2 are no longer connected to each other, and a plurality of outer walls 414 are enclosed to form an accommodation space for accommodating the first arc extinguishing chamber 1. At the same time, in order to ensure that the first arc extinguishing chamber 1 is The air flow in the arc extinguishing chamber 1 can be released. The embodiment of the present application also provides a third exhaust hole 4141 on the outer wall 414, and the gas in the first arc extinguishing chamber 1 can be released through the third exhaust hole 4141. Optionally, at least part of the third exhaust hole 4141 is provided through the outer wall 414 along the first direction X.

In some embodiments, please refer 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 It includes a second movable contact 331; wherein, the first movable contact 311 is located on the 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 along the first direction Y. X is located on at least one side of the first movable contact 311 .

The contact system 3 includes two movable contacts, and the first movable contact 31 plays a role in protecting the second movable contact 33 . Specifically, the conduction of the electrical switch relies on the contact between the second movable contact 331 on the second movable contact 33 and the corresponding static contact. When an internal fault occurs in the electrical switch or manual disconnection is required, the second movable contact 331 will be turned on. The contact 33 drives the first movable contact 31 to deflect synchronously, and the second movable contact 331 is separated from the corresponding static contact. However, due to the existence of the first movable contact 31, the second movable contact 331 will not move at this time. An arc is formed, and the current in the electrical switch will continue to move from the second movable contact 331 to the first movable contact 311. At the same time, the first movable contact 311 and the first static contact 32 are separated in 2 directions, and the arc is generated in conjunction with the first movable contact 311. between contact 311 and first stationary contact 32 . Therefore, the arrangement of the first movable contact 31 can protect the second movable contact 33 and reduce the damage of the second movable contact 33 due to the existence of arc.

In some embodiments, as shown in FIGS. 1 and 18 , the second movable contact 331 is located on the side of the first arc extinguishing chamber 1 away from the second arc extinguishing chamber 2 along 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 within the arc extinguishing system, and the second movable contact 331 is located outside the arc extinguishing system. This design can avoid and further reduce the risk of the second movable contact 331 participating in the arc extinguishing process, and play a role in protecting the second movable contact 331.

In some embodiments, please refer to Figure 19, the electrical switch further includes a transfer device 7, the transfer device 7 is configured to be able to generate a magnetic field, the magnetic field at least partially overlaps with the movement path of the arc, so that at least part of the arc moves under the action of the magnetic field Transfer to the first arc extinguishing chamber 1.

The magnetic field generated by the transfer device 7 can generate a Lorentz force to change the trajectory of the arc, so that at least part of the arc can be transferred to the first arc extinguishing chamber 1 under the action of the magnetic field. The embodiments of the present application do not limit the structure and layout of the transfer device 7 , as long as the magnetic field generated by the transfer device 7 can drive part of the arc to transfer into the first arc extinguishing chamber 1 .

In some embodiments, the transfer device 7 includes a permanent magnet 71 disposed along the third direction Z on at least one side of the contact system 3 .

The permanent magnet 71 usually includes two magnets with opposite polarities. The magnetic field generated by the permanent magnet 71 can change the movement path of the arc and help the arc transfer to the first arc extinguishing chamber 1 . In the embodiment of the present application, only one permanent magnet 71 may be provided and located on one side of the contact system 3 , or two permanent magnets 71 may be provided and simultaneously located on both sides of the contact system 3 . By way of example, the number of permanent magnets 71 is two and they are arranged on both sides of the contact system 3 at the same time. In this case, the two permanent magnets 71 are respectively located on the side of the first stationary contact 32 away from the first movable contact 311 and the side of the first movable contact 311 away from the first stationary contact 32 , that is, transferred The device 7 is arranged around the arc generation. This design can deflect the arc toward the first sub-arc-extinguishing chamber 11 or the second sub-arc-extinguishing chamber 12 in the first arc extinguishing chamber 1 .

In some embodiments, please refer to FIG. 20 , the permanent magnet 71 is disposed on a side of the first arc extinguishing chamber 1 away from the contact system 3 along the first direction X.

The first arc extinguishing chamber 1 includes a first sub-arc extinguishing chamber 11 and a second sub-arc extinguishing chamber 12. The number of permanent magnets 71 is two. One permanent magnet 71 is located in the first sub-arc extinguishing chamber 11 away from the second sub-arc extinguishing chamber 11. On one side of the arc chamber 12, another permanent magnet 71 is located on the side of the second sub-arc extinguishing chamber 12 away from the first sub-arc extinguishing chamber 11. The two permanent magnets 71 are symmetrically arranged. This design can directly arrange the permanent magnet 71 on the first arc isolation member 4a and the second arc isolation member 4b, thereby reducing the installation difficulty of the permanent magnet 71.

It should be noted that the single permanent magnet 71 includes two magnetic poles, N pole and S pole. The N pole can be located on the side of the S pole close to the second arc extinguishing chamber 2, or can be located on the side of the S pole away from the second arc extinguishing chamber 2. On one side, that is, the embodiment of the present application does not limit the arrangement of two magnetic poles with opposite polarities in a single permanent magnet 71 .

Although the embodiments disclosed in this application are as above, the described contents are only used to facilitate the understanding of this application and are not intended to limit the present invention. Any skilled person in the technical field to which this application belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in this application. However, the protection scope of this application remains The scope defined by the appended claims shall prevail.

The above is only a specific implementation mode of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, for the replacement of other connection methods described above, please refer to the corresponding ones in the foregoing method embodiments. The process will not be described again here. It should be understood that the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and these modifications or substitutions should be covered. within the protection scope of this application.

Claims (22)

1. An arc extinguishing system for an electrical switch, the electrical switch includes a contact system, characterized in that the arc extinguishing system includes: A first arc extinguishing chamber is provided on at least one side of the contact system along the first direction; A second arc extinguishing chamber is provided on one side of the contact system along a second direction, where the first direction intersects with the second direction; An arc isolation component is provided on at least one side of the contact system along the first direction. The arc isolation component includes a first part corresponding to the first arc extinguishing chamber, and an arc isolation component located along the first arc extinguishing chamber. At least part of the arc generated by the contact system moves into the first arc extinguishing chamber through the first gap formed by the depression in the first direction. 2. The arc extinguishing system according to claim 1, characterized in that the second arc extinguishing chamber includes a third sub-arc extinguishing chamber, and the arc isolation assembly includes an arc extinguishing component arranged on the first part along the second direction. A second part on a side away from the contact system, the second part includes a first through hole formed through the first through hole, and the third sub-arc extinguishing chamber is located in the first through hole. 3. The arc extinguishing system according to claim 2, wherein the second arc extinguishing chamber further includes a second arc extinguishing chamber located on the side of the third sub-arc extinguishing chamber away from the contact system along the second direction. The fourth sub-arc extinguishing chamber, the arc isolation assembly includes a third part disposed on the side of the second part away from the first part along the second direction, and is formed by the third part along the first part. The fourth sub-arc extinguishing chamber is at least partially located in the second through hole. 4. The arc extinguishing system according to claim 3, wherein the arc isolation component further includes a first insulating member disposed between the first through hole and the second through hole. 5. The arc extinguishing system according to claim 3, further comprising a first arc starting member disposed on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, so The first arc starting member includes a first sub-section stacked with the first arc extinguishing chamber, and a second sub-section stacked with the fourth sub-arc extinguishing chamber. The first direction, the third sub-arc extinguishing chamber The two directions and the third direction intersect in pairs. 6. The arc extinguishing system according to claim 5, further comprising a second insulating member, the second insulating member being disposed in the third sub-arc extinguishing chamber toward the first arc extinguishing chamber along a third direction. A first baffle on one side of the arc starting member, the first baffle is spaced apart from the first arc starting member. 7. The arc extinguishing system according to claim 6, wherein the second insulating member further includes an arc extinguishing member disposed in the fourth sub-arc extinguishing chamber in the third direction away from the first arc starting member. The second baffle on the side is used to connect the first baffle and the second baffle, and is disposed in the third sub-arc extinguishing chamber near the fourth sub-arc along the second direction. The first insulating plate on one side of the arc extinguishing chamber; Wherein, the first insulating plate and the connecting plate are sandwiched to form a first channel, and the first insulating plate has a first exhaust hole penetrating along 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. Two insulating plates are located on the side of the second baffle facing the fourth sub-arc extinguishing chamber, and the second insulating plate has a second exhaust hole penetrating along the second direction. 9. The arc extinguishing system according to claim 2, further comprising a second arc starting member disposed on one side of the first arc extinguishing chamber and the second arc extinguishing chamber along a third direction, so The second arc starting member includes a third sub-section stacked with the first arc extinguishing chamber, and a fourth sub-section stacked with the third sub-arc extinguishing chamber. The first direction, the third sub-arc extinguishing chamber, The two directions and the third direction intersect in pairs. 10. The arc extinguishing system of claim 2, wherein the first portion includes a first inner cavity, and the first arc extinguishing chamber is at least partially located in the first inner cavity; Wherein, the first notch communicates 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 includes a plurality of first grid sheets arranged in a stack and a first gap between adjacent first grid sheets. , the third sub-arc extinguishing chamber includes a plurality of stacked third grid sheets and a third gap located between adjacent third grid sheets; Wherein, at least part of the first gap is connected with the third gap. 12. The arc extinguishing system of claim 3, wherein the first part includes a first inner cavity, the first arc extinguishing chamber is at least partially located in the first inner cavity, and the second part It includes a second inner cavity disposed on one side of the first through hole along the third direction, and the second inner cavity is connected with the first inner cavity and the second through hole respectively. 13. The arc extinguishing system according to claim 12, wherein the first arc extinguishing chamber includes a plurality of first grid sheets arranged in a stack and a first gap between adjacent first grid sheets. , the fourth sub-arc extinguishing chamber includes a plurality of stacked fourth grid sheets and a fourth gap located between adjacent fourth grid sheets; Wherein, at least part of the first grid extends to the second inner cavity, and at least part of the first gap communicates with the fourth gap. 14. The arc extinguishing system according to claim 1, wherein the first arc extinguishing chamber includes a first sub-arc extinguishing chamber and a second sub-arc extinguishing chamber respectively arranged on both sides of the contact system along the first direction. Arc extinguishing chamber, the arc isolation assembly includes a first arc isolation piece disposed on the side of the first sub-arc extinguishing chamber facing the contact system, and a first arc isolating member disposed on the side of the second sub-arc extinguishing chamber facing the contact system. The second arc spacer on one side of the head system; Wherein, the first arc isolation component includes a first side wall facing the contact system, the second arc isolation component includes a second side wall facing the contact system, and the first side wall is connected with the contact system. The second side walls are spaced apart and form a second channel through which at least part of the arc moves to the second arc extinguishing chamber. 15. The arc extinguishing system according to claim 14, wherein at least one of the first arc isolating member and the second arc isolating member includes a gas generating material. 16. The arc extinguishing system according to claim 1, wherein the first part includes a plurality of outer walls surrounding the outer periphery of the first arc extinguishing chamber, and the plurality of outer walls have a surface facing toward the contact. The first opening of the system; Wherein, the outer wall includes a third exhaust hole penetrating along its thickness direction. 17. The arc extinguishing system according to claim 1, wherein the first arc extinguishing chamber includes a plurality of first grid sheets arranged in a stack, and the first grid sheets include a third grid facing the contact system. An edge, and a first arc groove formed by the inward depression of the first edge. 18. An electrical switch, characterized in that it includes a contact system and an arc extinguishing system according to any one of claims 1 to 17. 19. The electrical switch according to claim 18, wherein the contact system includes a first movable contact and a second movable contact, the first movable contact includes a first movable contact, and the The second movable contact includes a second movable contact; Wherein, the first movable contact is located on a side of the second movable contact close to the second arc extinguishing chamber along the second direction, and the first arc extinguishing chamber is located on a side along the first direction. At least one side of the first movable contact. 20. The electrical switch according to claim 19, wherein the first movable contact includes a body part and an arc starting part provided on at least one side of the body part along the first direction, and the arc starting part is The extending direction of the arc portion intersects the extending direction of the body portion. 21. The electrical switch according to claim 18, further comprising a transfer device configured to generate a magnetic field, the magnetic field at least partially overlaps with the motion path of the arc, so that at least Part of the arc is transferred to the first arc extinguishing chamber under the action of the magnetic field. 22. The electrical switch according to claim 21, wherein the transfer device includes a permanent magnet, and the permanent magnet is disposed on a portion of the first arc extinguishing chamber away from the contact system along the first direction. One side, or at least one side of the contact system along a third direction, the first direction, the second direction and the third direction intersect each other.