N-pole arc extinguishing structure and circuit breaker

Abstract

The utility model provides an N-pole arc extinguishing structure and a circuit breaker. The N-pole arc extinguishing structure comprises a first arc extinguishing channel, a second arc extinguishing channel, a first arc outlet and a second arc outlet. The first arc extinguishing channel and the second arc extinguishing channel are arranged in the circuit breaker. An arc generating device of the circuit breaker is arranged on one side of a first arc extinguishing channel and a second arc extinguishing channel, so that a part of arc generated by the arc generating device enters the first arc extinguishing channel, and the other part of arc enters the second arc extinguishing channel. And the first arc outlet is arranged at the other side of the first arc extinguishing channel, and the first arc outlet is communicated with the outside of the circuit breaker, so that the arc in the first arc extinguishing channel moves towards the direction of the first arc outlet. And the second arc outlet is arranged at the other side of the second arc extinguishing channel, and the second arc outlet is communicated with the outside of the circuit breaker, so that the arc in the second arc extinguishing channel moves towards the direction of the second arc outlet. The first arc extinguishing channel and the second arc extinguishing channel disperse arc energy, and the arc extinguishing effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to an N-pole arc extinguishing structure and a circuit breaker. Background Art

[0002] The DPN miniature circuit breaker is provided with an L-pole system and an N-pole system on both sides. The N-pole arc extinguishing structure such as the arc extinguishing cover and the arc starting plate is arranged on the same side as the L-pole system, so that the L-pole system can extinguish the arc quickly. The N-pole system is provided with only moving contacts and stationary contacts.

[0003] In the related art, an arc is generated between the moving contact and the stationary contact in the N-pole system, causing the components in the N-pole system to be burned, thereby affecting the service life of the circuit breaker. Utility Model Content

[0004] The present application provides an N-pole arc extinguishing structure and a circuit breaker to reduce the problem of ablation of components in an N-pole system and extend the service life of the circuit breaker.

[0005] In the first aspect, the present application provides an N-pole arc extinguishing structure, which is applied to a circuit breaker. The N-pole arc extinguishing structure may include: a first arc extinguishing channel, a second arc extinguishing channel, a first arc outlet, and a second arc outlet. The first arc extinguishing channel is arranged inside the circuit breaker. The second arc extinguishing channel is arranged inside the circuit breaker. The arc generating device of the circuit breaker is arranged on one side of the first arc extinguishing channel and the second arc extinguishing channel, so that a part of the arc generated by the arc generating device enters the first arc extinguishing channel, and another part of the arc generated by the arc generating device enters the second arc extinguishing channel. The first arc outlet is arranged on the other side of the first arc extinguishing channel, and the first arc outlet is connected to the outside of the circuit breaker, so that the arc in the first arc extinguishing channel moves toward the direction of the first arc outlet. The second arc outlet is arranged on the other side of the second arc extinguishing channel, and the second arc outlet is connected to the outside of the circuit breaker, so that the arc in the second arc extinguishing channel moves toward the direction of the second arc outlet.

[0006] Through the first aspect, the generation of the electric arc is accompanied by a large amount of high-temperature gas, so that there is a temperature difference and a pressure difference between the inside and the outside of the circuit breaker. The pressure difference and the temperature difference cause a part of the electric arc and the high-temperature gas to enter the first arc extinguishing channel from the first inlet end and move in the direction of the first arc outlet, and cause another part of the electric arc and the high-temperature gas to enter the second arc extinguishing channel from the second inlet end and move in the direction of the second arc outlet. The N-pole arc extinguishing structure reduces the temperature and weakens the energy of the arc during the movement, so as to reduce the ablation problem of the components in the N-pole system, thereby extending the service life of the circuit breaker. Furthermore, the first arc extinguishing channel and the second arc extinguishing channel disperse the energy of the arc, thereby improving the arc extinguishing effect of the N-pole arc extinguishing structure.

[0007] In a possible design, a first isolation bar, a second isolation bar and a third isolation bar are provided inside the circuit breaker. The second isolation bar is provided between the first isolation bar and the third isolation bar, so that the first arc extinguishing channel is formed between the first isolation bar and the second isolation bar, and the second arc extinguishing channel is formed between the second isolation bar and the third isolation bar.

[0008] Based on the description of the above embodiment, a first arc extinguishing channel is formed between the first isolation bar and the second isolation bar, and a second arc extinguishing channel is formed between the second isolation bar and the third isolation bar. The first isolation bar, the second isolation bar and the third isolation bar are used to prevent the arc from escaping the first arc extinguishing channel and the second arc extinguishing channel, and to avoid the arc from burning other components in the circuit breaker, thereby enhancing the arc extinguishing effect of the N-pole arc extinguishing structure.

[0009] In a possible design, one or more first buffer zones are provided in the first arc extinguishing channel, and the first buffer zones are used to extend the moving path of the electric arc in the first arc extinguishing channel.

[0010] Based on the description of the above embodiments, one or more first buffer zones are provided in the first arc extinguishing channel, which are used to extend the moving path of the arc in the first arc extinguishing channel, thereby enhancing the arc extinguishing effect of the first arc extinguishing channel.

[0011] In a possible design, one or more second buffer zones are provided in the second arc extinguishing channel. The second buffer zones are used to extend the moving path of the arc in the second arc extinguishing channel.

[0012] Based on the description of the above embodiments, one or more second buffer zones are provided in the second arc extinguishing channel to extend the moving path of the arc in the second arc extinguishing channel, thereby enhancing the arc extinguishing effect of the second arc extinguishing channel.

[0013] In a possible design, one or more first baffles are provided in the first arc extinguishing channel. The first baffles and the first arc extinguishing channel extend in different directions, and the first baffles are used to change the moving path of the arc in the first arc extinguishing channel.

[0014] Based on the description of the above embodiments, one or more first baffles with an extension direction different from that of the first arc extinguishing channel are provided in the first arc extinguishing channel, which further prolongs the cooling time of the arc in the first arc extinguishing channel, thereby enhancing the arc extinguishing effect of the first arc extinguishing channel.

[0015] In a possible design, one or more second baffles are provided in the second arc extinguishing channel. The second baffles and the second arc extinguishing channel extend in different directions, and the second baffles are used to change the moving path of the arc in the second arc extinguishing channel.

[0016] Based on the description of the above embodiments, one or more second baffles with an extension direction different from the second arc extinguishing channel are provided in the second arc extinguishing channel, which further prolongs the cooling time of the arc in the second arc extinguishing channel, thereby enhancing the arc extinguishing effect of the second arc extinguishing channel.

[0017] In a possible design, an inner diameter of the first arc outlet is greater than or equal to 2 mm, and an inner diameter of the first arc outlet is less than or equal to 3 mm.

[0018] Based on the description of the above embodiments, the inner diameter of the first arc outlet is in the range of 2mm-3mm, which neither affects the movement of the arc toward the first arc outlet nor can maximize the cooling time of the arc in the first arc extinguishing channel, thereby enhancing the arc extinguishing effect of the first arc extinguishing channel.

[0019] In a possible design, an inner diameter of the second arc outlet is greater than or equal to 2 mm, and an inner diameter of the second arc outlet is less than or equal to 3 mm.

[0020] Based on the description of the above embodiment, the inner diameter range of the second arc outlet is between 2mm-3mm, which neither affects the movement of the arc toward the second arc outlet nor can maximize the cooling time of the arc in the second arc extinguishing channel, thereby enhancing the arc extinguishing effect of the second arc extinguishing channel.

[0021] In a second aspect, the present application provides a circuit breaker, comprising: a housing, an N-pole system, and an N-pole arc extinguishing structure as described in any one of the above embodiments. The housing comprises a cover and a base. The base and the cover are snapped together to form a receiving cavity. The N-pole system is located in the receiving cavity, and the N-pole system includes an arc generating device. The N-pole arc extinguishing structure is located in the receiving cavity, and is used to extinguish the arc generated in the arc generating device.

[0022] In a possible design, the N-pole arc extinguishing structure has a first isolation bar, a second isolation bar and a third isolation bar. The first isolation bar, the second isolation bar and the third isolation bar are all arranged on the base. The cover body is provided with a fourth isolation bar, a fifth isolation bar and a sixth isolation bar. When the base is buckled with the cover body, the fourth isolation bar is buckled with the first isolation bar, the fifth isolation bar is buckled with the second isolation bar, and the sixth isolation bar is buckled with the third isolation bar.

[0023] Based on the description of the above embodiment, the first isolation bar, the second isolation bar and the third isolation bar are on the base. The fourth isolation bar, the fifth isolation bar and the sixth isolation bar are all arranged on the cover body. When the base is buckled with the cover body, the fourth isolation bar is buckled with the first isolation bar, the fifth isolation bar is buckled with the second isolation bar, and the sixth isolation bar is buckled with the third isolation bar, so that the first arc extinguishing channel and the second arc extinguishing channel become a relatively closed space, further preventing the arc from escaping the N-pole arc extinguishing structure, avoiding the arc from burning other components in the circuit breaker, thereby enhancing the arc extinguishing effect of the N-pole arc extinguishing structure.

[0024] The beneficial effects provided in the above-mentioned second aspect and various possible designs of the above-mentioned second aspect can refer to the beneficial effects brought about by the above-mentioned first aspect and various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the structure of a circuit breaker in an embodiment of the present application.

[0027] Figure 2 for Figure 1 Exploded view of the explosion along the first direction.

[0028] Figure 3 This is a structural schematic diagram of an N-pole arc extinguishing structure and a base in an embodiment of the present application.

[0029] Figure 4 for Figure 3 Magnified view of section A.

[0030] Figure 5 It is a structural schematic diagram of a cover body in an embodiment of the present application.

[0031] Figure 6 for Figure 5Magnified view of section B.

[0032] Figure 7 for Figure 3 Isometric view of.

[0033] Figure 8 for Figure 7 Magnified view of section C.

[0034] Description of reference numerals:

[0035] 100-circuit breaker;

[0036] 1- Base;

[0037] 11-static contact; 12-moving contact;

[0038] 2-N pole arc extinguishing structure; 21-first arc extinguishing channel; 22-second arc extinguishing channel; 2a-first isolation bar; 2b-second isolation bar; 2c-third isolation bar;

[0039] 23-first arc outlet; 24-second arc outlet;

[0040] 25-first buffer zone; 26-second buffer zone;

[0041] 27-first baffle; 28-second baffle;

[0042] 3-cover; 3a-fourth isolation strip; 3b-fifth isolation strip; 3c-sixth isolation strip;

[0043] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0046] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0047] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0049] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. For example, in the description of the present application, the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0050] In addition, the expressions of the indicated directions, such as the X direction, the Y direction, and the Z direction, used to illustrate the operation and construction of the components of the present embodiment are not absolute but relative, and although these indications are appropriate when the components of the battery pack are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0051] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0052] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0053] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] The circuit breaker may include: a housing, an L-pole system and an N-pole system. The housing may include a cover and a base, and the base and the cover are buckled to form an accommodating cavity. The L-pole system and the N-pole system are both arranged in the accommodating cavity.

[0055] The housing may include two covers, one of which is buckled with the base at one side in the first direction to form a first accommodating cavity. Figure 1 and Figure 2 As shown, another cover 3 is buckled with the base 1 on the other side of the first direction X to form a second accommodating cavity. The first direction X is the thickness direction of the circuit breaker 100 .

[0056] The L-pole system (not shown in the figure) is arranged in the first accommodating cavity, and the N-pole system (not shown in the figure) is arranged in the first accommodating cavity. It can be understood that the L-pole system and the N-pole system are separated by the base 1 and are respectively located on both sides of the base 1 along the first direction X.

[0057] Both the L-pole system and the N-pole system may include an arc generating device, in which an arc is generated. The arc may burn components in the circuit breaker 100 , thereby shortening the service life of the circuit breaker 100 .

[0058] The arc generating device in the L-pole system may be the moving contact and the stationary contact in the L-pole system, and the arc generating device in the N-pole system may be the moving contact 12 and the stationary contact 11 in the N-pole system.

[0059] Specifically, at the moment when the moving contact 12 and the stationary contact 11 are closed or opened, an arc is generated between the moving contact 12 and the stationary contact 11 .

[0060] The L-pole system may include a moving contact, a stationary contact, an arc extinguishing hood and an arc striking plate, wherein the arc extinguishing hood and the arc striking plate are used to extinguish the arc between the moving contact 12 and the stationary contact 11 of the L-pole system to prevent the components in the L-pole system from being ablated.

[0061] In the related art, the N-pole system is only provided with a moving contact 12 and a stationary contact 11. The arc generated between the moving contact 12 and the stationary contact 11 of the N-pole system causes the parts in the N-pole system to be ablated, thereby affecting the service life of the circuit breaker 100.

[0062] Based on the above content, the present application provides an N-pole arc extinguishing structure 2 for extinguishing the arc generated between the moving contact 12 and the stationary contact 11 of the N-pole system to solve the problem of ablation of components in the N-pole system and extend the service life of the circuit breaker 100.

[0063] The following is attached to the instruction manual Figure 2-Figure 8 , the N-pole arc extinguishing structure 2 provided in an embodiment of the present application is described in detail.

[0064] The N-pole arc extinguishing structure 2 provided in the present application may include: a first arc extinguishing channel 21, a second arc extinguishing channel 22, a first arc outlet 23, and a second arc outlet 24. The first arc extinguishing channel 21 is arranged inside the circuit breaker 100. The second arc extinguishing channel 22 is arranged inside the circuit breaker 100. The arc generating device of the circuit breaker 100 is arranged on one side of the first arc extinguishing channel 21 and the second arc extinguishing channel 22, so that a part of the arc generated by the arc generating device enters the first arc extinguishing channel 21, and another part of the arc generated by the arc generating device enters the second arc extinguishing channel 22. The first arc outlet 23 is arranged on the other side of the first arc extinguishing channel 21, and the first arc outlet 23 is connected to the outside of the circuit breaker 100, so that the arc in the first arc extinguishing channel 21 moves toward the direction of the first arc outlet 23. The second arc outlet 24 is arranged on the other side of the second arc extinguishing channel 22, and the second arc outlet 24 is connected to the outside of the circuit breaker 100, so that the arc in the second arc extinguishing channel 22 moves toward the direction of the second arc outlet 24.

[0065] Reference Figure 3 , the first arc extinguishing channel 21 extends along the second direction Y, so that the first arc extinguishing channel 21 includes a first inlet end and a first outlet end. Similarly, the second arc extinguishing channel 22 extends along the second direction Y, so that the second arc extinguishing channel 22 includes a second inlet end and a second outlet end. Figure 2 and Figure 3 As shown, the second direction Y is the height direction of the circuit breaker 100 .

[0066] Reference Figure 3 The first arc extinguishing channel 21 and the second arc extinguishing channel 22 are adjacently arranged inside the circuit breaker 100 along the third direction Z. Figure 3 As shown, the third direction Z is the width direction of the circuit breaker 100. When the first arc extinguishing channel 21 and the second arc extinguishing channel 22 are arranged adjacent to each other, the first inlet end and the second inlet end are both close to the arc generating device. The arc generating device can be as follows: Figure 2 The moving contact 12 and the stationary contact 11 are shown. At the moment when the moving contact 12 and the stationary contact 11 are opened or closed, an arc will be generated between the moving contact 12 and the stationary contact 11.

[0067] Reference Figure 3 and Figure 4 The first arc outlet 23 and the second arc outlet 24 are through holes opened on the housing of the circuit breaker 100 , so that the inside of the circuit breaker 100 is connected with the outside of the circuit breaker 100 .

[0068] Specifically, the first outlet end may be set as a first arc outlet 23, so that the first arc extinguishing channel 21 disposed inside the circuit breaker 100 is connected to the outside of the circuit breaker 100 through the first arc outlet 23. Similarly, the second outlet end may be set as a second arc outlet 24, so that the second arc extinguishing channel 22 disposed inside the circuit breaker 100 is connected to the outside of the circuit breaker 100 through the second arc outlet 24.

[0069] In summary, the generation of the electric arc is accompanied by a large amount of high-temperature gas, which causes a temperature difference and a pressure difference between the inside of the circuit breaker 100 and the outside of the circuit breaker 100. The pressure difference and the temperature difference cause a part of the electric arc and the high-temperature gas to enter the first arc extinguishing channel 21 from the first inlet end and move toward the first arc outlet 23, and cause another part of the electric arc and the high-temperature gas to enter the second arc extinguishing channel 22 from the second inlet end and move toward the second arc outlet 24. The N-pole arc extinguishing structure 2 reduces the temperature and energy of the arc during the movement, so as to reduce the ablation problem of the components in the N-pole system, thereby extending the service life of the circuit breaker 100. Furthermore, the first arc extinguishing channel 21 and the second arc extinguishing channel 22 disperse the energy of the arc, thereby improving the arc extinguishing effect of the N-pole arc extinguishing structure 2.

[0070] In some embodiments, a first isolation bar 2a, a second isolation bar 2b and a third isolation bar 2c are provided inside the circuit breaker 100. The second isolation bar 2b is provided between the first isolation bar 2a and the third isolation bar 2c, so that a first arc extinguishing channel 21 is formed between the first isolation bar 2a and the second isolation bar 2b, and a second arc extinguishing channel 22 is formed between the second isolation bar 2b and the third isolation bar 2c.

[0071] The first isolation bar 2a, the second isolation bar 2b and the third isolation bar 2c may be rib structures arranged inside the circuit breaker 100, and there is a groove between the two rib structures. The first groove between the first isolation bar 2a and the second isolation bar 2b may be configured as the first arc extinguishing channel 21. Similarly, the second groove between the second isolation bar 2b and the third isolation bar 2c may be configured as the second arc extinguishing channel 22. The rib structure and the circuit breaker 100 may be an integrally formed structure. Alternatively, the rib structure and the circuit breaker 100 may be detachably connected.

[0072] Based on this, when the arc in the first arc extinguishing channel 21 moves in the first groove, the first isolation strip 2a and the second isolation strip 2b on both sides of the first groove are used to prevent the arc from escaping the first arc extinguishing channel 21, thereby preventing the arc from burning other components in the circuit breaker 100. Similarly, when the arc in the second arc extinguishing channel 22 moves in the second groove, the second isolation strip 2b and the third isolation strip 2c on both sides of the second groove are used to prevent the arc from escaping the second arc extinguishing channel 22, thereby preventing the arc from burning other components in the circuit breaker 100.

[0073] Furthermore, if Figure 4 As shown, the first isolation strip 2a, the second isolation strip 2b and the third isolation strip 2c are sequentially arranged inside the circuit breaker 100 along the third direction Z, so that the first arc extinguishing channel 21 and the second arc extinguishing channel 22 are adjacently arranged inside the circuit breaker 100 along the third direction Z.

[0074] Based on the description of the above embodiment, a first arc extinguishing channel 21 is formed between the first isolation bar 2a and the second isolation bar 2b, and a second arc extinguishing channel 22 is formed between the second isolation bar 2b and the third isolation bar 2c. The first isolation bar 2a, the second isolation bar 2b and the third isolation bar 2c are used to prevent the arc from escaping the first arc extinguishing channel 21 and the second arc extinguishing channel 22, and to prevent the arc from escaping and burning other components in the circuit breaker 100 during movement, thereby enhancing the arc extinguishing effect of the N-pole arc extinguishing structure 2.

[0075] In some embodiments, Figure 5 and Figure 6 As shown, the N-pole arc extinguishing structure 2 has a first isolation bar 2a, a second isolation bar 2b and a third isolation bar 2c. Among them, the first isolation bar 2a, the second isolation bar 2b and the third isolation bar 2c are all arranged on the base 1. The cover body 3 is provided with a fourth isolation bar 3a, a fifth isolation bar 3b and a sixth isolation bar 3c. When the base 1 is buckled with the cover body 3, the fourth isolation bar 3a is buckled with the first isolation bar 2a, the fifth isolation bar 3b is buckled with the second isolation bar 2b, and the sixth isolation bar 3c is buckled with the third isolation bar 2c.

[0076] It can be known from the above contents that the base 1 and the cover 3 are buckled together to form a receiving cavity, and the N-pole system and the N-pole arc extinguishing structure 2 are both arranged in the receiving cavity.

[0077] The fourth isolation bar 3a, the fifth isolation bar 3b and the sixth isolation bar 3c can be rib structures arranged inside the circuit breaker 100, and there is a groove between the two rib structures. The third groove between the fourth isolation bar 3a and the fifth isolation bar 3b can be combined with the first arc extinguishing channel 21 arranged on the base 1, so that the first arc extinguishing channel 21 becomes a relatively closed space, further preventing the arc from escaping the first arc extinguishing channel 21, and avoiding the arc from burning other parts in the circuit breaker 100. Similarly, the fourth groove between the fifth isolation bar 3b and the sixth isolation bar 3c can be combined with the second arc extinguishing channel 22 arranged on the base 1, so that the second arc extinguishing channel 22 becomes a relatively closed space, further preventing the arc from escaping the second arc extinguishing channel 22, and avoiding the arc from burning other parts in the circuit breaker 100. Among them, the above-mentioned rib structure and the circuit breaker 100 can be an integrally formed structure. Alternatively, the above-mentioned rib structure and the circuit breaker 100 can be detachably connected.

[0078] Based on the description of the above embodiment, the first isolation strip 2a, the second isolation strip 2b and the third isolation strip 2c are on the base 1. The fourth isolation strip 3a, the fifth isolation strip 3b and the sixth isolation strip 3c are all arranged on the cover 3. When the base 1 is buckled with the cover 3, the fourth isolation strip 3a is buckled with the first isolation strip 2a, the fifth isolation strip 3b is buckled with the second isolation strip 2b, and the sixth isolation strip 3c is buckled with the third isolation strip 2c, so that the first arc extinguishing channel 21 and the second arc extinguishing channel 22 become a relatively closed space, further preventing the arc from escaping the N-pole arc extinguishing structure 2, avoiding the arc from burning other components in the circuit breaker 100, thereby enhancing the arc extinguishing effect of the N-pole arc extinguishing structure 2.

[0079] In some embodiments, Figure 4 As shown, one or more first buffer zones 25 are provided in the first arc extinguishing channel 21. The first buffer zone 25 is used to extend the moving path of the arc in the first arc extinguishing channel 21.

[0080] The first buffer zone 25 may be a region where the first isolation strip 2 a extends along the third direction Z, or a region where the second isolation strip 2 b extends along the third direction Z.

[0081] Based on this, the arc in the first arc extinguishing channel 21 will pass through the above-mentioned first buffer zone 25 during its movement along the first arc extinguishing channel 21, thereby increasing the moving path of the arc and extending the cooling time of the arc in the first arc extinguishing channel 21, so that when the arc escapes from the first arc outlet 23, the temperature and energy are reduced to a safe range, thereby avoiding ablation of other electronic equipment outside the circuit breaker 100, thereby enhancing the arc extinguishing effect of the first arc extinguishing channel 21. It is easy to understand that the more the number of first buffer zones 25, the longer the moving path of the arc, and the better the arc extinguishing effect of the first arc extinguishing channel 21. The number of first buffer zones 25 is not specifically limited here.

[0082] Based on the description of the above embodiments, one or more first buffer zones 25 are provided in the first arc extinguishing channel 21 to extend the moving path of the arc in the first arc extinguishing channel 21 , thereby enhancing the arc extinguishing effect of the first arc extinguishing channel 21 .

[0083] In some embodiments, Figure 4 As shown, one or more second buffer zones 26 are provided in the second arc extinguishing channel 22. The second buffer zones 26 are used to extend the moving path of the arc in the second arc extinguishing channel 22.

[0084] The second buffer zone 26 may be a region where the second isolation strip 2 b extends along the third direction Z, or a region where the third isolation strip 2 c extends along the third direction Z.

[0085] Based on this, the arc in the second arc extinguishing channel 22 will pass through the second buffer zone 26 during its movement along the second arc extinguishing channel 22, thereby increasing the moving path of the arc and extending the cooling time of the arc in the second arc extinguishing channel 22, so that when the arc escapes from the second arc outlet 24, the temperature and energy are reduced to a safe range, thereby avoiding ablation of other electronic devices outside the circuit breaker 100, thereby enhancing the arc extinguishing effect of the second arc extinguishing channel 22. It is easy to understand that the more the number of second buffer zones 26, the longer the moving path of the arc, and the better the arc extinguishing effect of the second arc extinguishing channel 22. The number of second buffer zones 26 is not specifically limited here.

[0086] Based on the description of the above embodiment, one or more second buffer zones 26 are provided in the second arc extinguishing channel 22 for extending the moving path of the arc in the second arc extinguishing channel 22 , thereby enhancing the arc extinguishing effect of the second arc extinguishing channel 22 .

[0087] In some embodiments, one or more first baffles 27 are disposed in the first arc extinguishing channel 21 . The first baffles 27 and the first arc extinguishing channel 21 extend in different directions, and the first baffles 27 are used to change the moving path of the arc in the first arc extinguishing channel 21 .

[0088] Reference Figure 7 and Figure 8 There may be a first gap between the first baffle 27 and the first isolation strip 2a, there may be a second gap between the first baffle 27 and the second isolation strip 2b, and there may be a non-zero angle between the first baffle 27 and the second direction Y.

[0089] Based on this, part of the arc in the first arc extinguishing channel 21 will hit the first baffle 27, so that the arc can continue to move from the first gap or the second gap toward the first arc outlet 23 after multiple reciprocating motions, so as to further extend the arc cooling time in the first arc extinguishing channel 21, thereby enhancing the arc extinguishing effect of the first arc extinguishing channel 21.

[0090] It is easy to understand that the more the number of first baffles 27 is, the longer the moving path of the arc is, and the better the arc extinguishing effect of the first arc extinguishing channel 21 is. The number of the first baffles 27 is not specifically limited here.

[0091] Based on the description of the above embodiment, one or more first baffles 27 extending in a direction different from that of the first arc extinguishing channel 21 are provided in the first arc extinguishing channel 21, which further prolongs the cooling time of the arc in the first arc extinguishing channel 21, thereby enhancing the arc extinguishing effect of the first arc extinguishing channel 21.

[0092] In some embodiments, one or more second baffles 28 are disposed in the second arc extinguishing channel 22. The second baffles 28 and the second arc extinguishing channel 22 extend in different directions, and the second baffles 28 are used to change the moving path of the arc in the second arc extinguishing channel 22.

[0093] Reference Figure 7 and Figure 8 There may be a third gap between the second baffle 28 and the second isolation strip 2b, there may be a fourth gap between the second baffle 28 and the third isolation strip 2c, and there may be a non-zero angle between the second baffle 28 and the second direction Y.

[0094] Based on this, part of the arc in the second arc extinguishing channel 22 will hit the second baffle 28, so that the arc can continue to move from the third gap or the fourth gap toward the second arc outlet 24 after multiple reciprocating motions, so as to further extend the arc cooling time in the second arc extinguishing channel 22, thereby enhancing the arc extinguishing effect of the second arc extinguishing channel 22.

[0095] It is easy to understand that the more the number of the second baffles 28 is, the longer the moving path of the arc is, and the better the arc extinguishing effect of the second arc extinguishing channel 22 is. The number of the second baffles 28 is not specifically limited here.

[0096] Based on the description of the above embodiment, one or more second baffles 28 extending in a direction different from the second arc extinguishing channel 22 are provided in the second arc extinguishing channel 22, which further prolongs the cooling time of the arc in the second arc extinguishing channel 22, thereby enhancing the arc extinguishing effect of the second arc extinguishing channel 22.

[0097] In some embodiments, the inner diameter of the first arc outlet 23 is greater than or equal to 2 mm, and the inner diameter of the first arc outlet 23 is less than or equal to 3 mm.

[0098] According to the relationship between pressure and flow rate, the size of the inner diameter of the first arc outlet 23 is related to the moving speed of the arc in the first arc extinguishing channel 21. The larger the inner diameter of the first arc outlet 23, the slower the moving speed of the arc, and the longer the arc cooling time in the first arc extinguishing channel 21, which is conducive to enhancing the arc extinguishing effect of the first arc extinguishing channel 21. However, when the inner diameter of the first arc outlet 23 is too large, it will cause insufficient pressure inside the circuit breaker 100, affecting the movement of the arc toward the first arc outlet 23.

[0099] Based on this, the inner diameter range of the first arc outlet 23 can be determined through multiple experiments, which will not affect the movement of the arc toward the first arc outlet 23 and can maximize the arc cooling time in the first arc extinguishing channel 21.

[0100] Based on the description of the above embodiment, the inner diameter of the first arc outlet 23 is in the range of 2mm-3mm, which does not affect the movement of the arc toward the first arc outlet 23 and can maximize the cooling time of the arc in the first arc extinguishing channel 21, thereby enhancing the arc extinguishing effect of the first arc extinguishing channel 21.

[0101] In some embodiments, the inner diameter of the second arc outlet 24 is greater than or equal to 2 mm, and the inner diameter of the second arc outlet 24 is less than or equal to 3 mm.

[0102] According to the relationship between pressure and flow rate, the size of the inner diameter of the second arc outlet 24 is related to the moving speed of the arc in the second arc extinguishing channel 22. The larger the inner diameter of the second arc outlet 24, the slower the moving speed of the arc, and the longer the arc cooling time in the second arc extinguishing channel 22, which is conducive to enhancing the arc extinguishing effect of the second arc extinguishing channel 22. However, when the inner diameter of the second arc outlet 24 is too large, it will lead to insufficient pressure inside the circuit breaker 100, affecting the movement of the arc toward the second arc outlet 24.

[0103] Based on this, the inner diameter range of the second arc outlet 24 can be determined through multiple experiments, which will not affect the movement of the arc toward the second arc outlet 24 and can maximize the arc cooling time in the second arc extinguishing channel 22.

[0104] Based on the description of the above embodiment, the inner diameter of the second arc outlet 24 is in the range of 2mm-3mm, which does not affect the movement of the arc toward the second arc outlet 24 and can maximize the cooling time of the arc in the second arc extinguishing channel 22, thereby enhancing the arc extinguishing effect of the second arc extinguishing channel 22.

[0105] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0106] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An N-pole arc extinguishing structure, applied to a circuit breaker, characterized in that: The N-pole arc extinguishing structure comprises: a first arc extinguishing channel, wherein the first arc extinguishing channel is arranged inside the circuit breaker; a second arc extinguishing channel, wherein the second arc extinguishing channel is arranged inside the circuit breaker; Wherein, the arc generating device of the circuit breaker is arranged on one side of the first arc extinguishing channel and the second arc extinguishing channel, so that a part of the arc generated by the arc generating device enters the first arc extinguishing channel, and another part of the arc generated by the arc generating device enters the second arc extinguishing channel; a first arc outlet, the first arc outlet being arranged at the other side of the first arc extinguishing channel, the first arc outlet being in communication with the outside of the circuit breaker so that the arc in the first arc extinguishing channel moves toward the first arc outlet; A second arc outlet is provided at the other side of the second arc extinguishing channel, and the second arc outlet is communicated with the outside of the circuit breaker so that the arc in the second arc extinguishing channel moves toward the second arc outlet.

2. The N-pole arc extinguishing structure according to claim 1, characterized in that: The circuit breaker is provided with a first isolation bar, a second isolation bar and a third isolation bar inside; The second isolation bar is disposed between the first isolation bar and the third isolation bar, so that the first arc extinguishing channel is formed between the first isolation bar and the second isolation bar, and the second arc extinguishing channel is formed between the second isolation bar and the third isolation bar.

3. The N-pole arc extinguishing structure according to claim 2, characterized in that: One or more first buffer zones are provided in the first arc extinguishing channel; The first buffer zone is used to extend a moving path of the arc in the first arc extinguishing channel.

4. The N-pole arc extinguishing structure according to claim 2, characterized in that: One or more second buffer zones are provided in the second arc extinguishing channel; The second buffer zone is used to extend the moving path of the arc in the second arc extinguishing channel.

5. The N-pole arc extinguishing structure according to claim 2, characterized in that: One or more first baffles are provided in the first arc extinguishing channel; The first baffle plate and the first arc extinguishing channel extend in different directions, and the first baffle plate is used to change a moving path of the arc in the first arc extinguishing channel.

6. The N-pole arc extinguishing structure according to claim 2, characterized in that: One or more second baffles are provided in the second arc extinguishing channel; The second baffle plate and the second arc extinguishing channel extend in different directions, and the second baffle plate is used to change a moving path of the arc in the second arc extinguishing channel.

7. The N-pole arc extinguishing structure according to claim 1, characterized in that: An inner diameter of the first arc outlet is greater than or equal to 2 mm, and an inner diameter of the first arc outlet is less than or equal to 3 mm.

8. The N-pole arc extinguishing structure according to claim 1, characterized in that: An inner diameter of the second arc outlet is greater than or equal to 2 mm, and an inner diameter of the second arc outlet is less than or equal to 3 mm.

9. A circuit breaker, characterized in that: include: A housing, an N-pole system and an N-pole arc extinguishing structure according to any one of claims 1 to 8; The housing comprises a cover and a base; The base and the cover body are buckled together to form a receiving cavity; The N-pole system is located in the accommodating cavity, and the N-pole system includes an arc generating device; The N-pole arc extinguishing structure is located in the accommodating cavity and is used to extinguish the arc generated in the arc generating device.

10. The circuit breaker according to claim 9, characterized in that The N-pole arc extinguishing structure comprises a first isolation bar, a second isolation bar and a third isolation bar; Wherein, the first isolation bar, the second isolation bar and the third isolation bar are all arranged on the base; The cover body is provided with a fourth isolation strip, a fifth isolation strip and a sixth isolation strip; When the base is buckled with the cover body, the fourth isolation strip is buckled with the first isolation strip, the fifth isolation strip is buckled with the second isolation strip, and the sixth isolation strip is buckled with the third isolation strip.

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