A circuit breaker utilizing exhaust and wire layout
By designing baffles and dividing cylinders in the circuit breaker to divert high-temperature gas, and setting up buffer and diversion zones, the problems of arc ignition and untimely high-temperature gas emission are solved, thus improving the safety performance and reliability of the product.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG AOELEC ELECTRICAL CO LTD
- Filing Date
- 2025-09-12
- Publication Date
- 2026-07-31
AI Technical Summary
In existing 18mm wide 1P+N residual current circuit breakers, untimely arc ignition and high-temperature gas venting, and improper wire management can affect product performance and may even cause the product to explode.
Design a circuit breaker structure including a base, a middle seat, and a top cover. Set up partitions and baffles to form an accommodating space, rationally arrange magnetic ring conductors, use dividing cylinders and dividing bosses to divert high-temperature gas, set up a buffer space area and a diversion area, and use metal supports to prevent deformation to ensure smooth discharge of high-temperature gas.
It effectively optimizes product performance, improves safety, prevents product explosion, ensures that wires and circuit boards are not damaged, and enables the smooth discharge of high-temperature gases.
Smart Images
Figure CN224582220U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit breaker technology, and more specifically, to a circuit breaker utilizing venting and conductor layout. Background Technology
[0002] In existing 18mm wide 1P+N residual current circuit breakers, even with complete functionality, there are numerous components and a compact internal structure. Arc initiation, high-temperature gas venting, and proper conductor routing are crucial, especially in circuit breakers where the N-pole input terminal is replaced by a conductor instead of a terminal block. Under current designs, if arc initiation and high-temperature gas venting are not timely, or if improper conductor routing causes interference, product performance will be severely affected during operation, potentially even leading to product explosion. Therefore, a structure that facilitates arc initiation, allows for efficient high-temperature gas venting, and ensures proper conductor routing is needed to optimize product performance and improve safety. Utility Model Content
[0003] This invention overcomes the shortcomings of the prior art. Its structural design is reasonable, which facilitates the emission of high-temperature gases. Furthermore, the proper arrangement of the magnetic ring wires prevents interference from other components, effectively optimizing product performance and improving the safety factor.
[0004] To achieve the above objectives, the present invention provides the following technical solution: A circuit breaker utilizing an exhaust and conductor layout includes a base, a middle section, and a top cover. The middle section is located between the base and the top cover. The base is equipped with an N-pole stationary contact, a circuit board, and a magnetic ring. A magnetic ring conductor connects the magnetic ring and the circuit board. The position of the N-pole stationary contact on the base is a high-temperature gas generation area. The base is equipped with a base exhaust port, and the middle section is equipped with a corresponding middle section exhaust port. The high-temperature gas in the high-temperature gas generation area is discharged from the base exhaust port and the middle section exhaust port. A partition and a spacer are provided on the base above the N-pole stationary contact. The partition is positioned above the spacer, and a spacer space is formed between the partition and the spacer for the magnetic ring conductor to pass through. The partition is equipped with a dividing part, which divides the base to form a buffer space area. The partition is positioned below the base exhaust port.
[0005] By adopting the above technical solution, during assembly, the N-pole stationary contact is first placed on the base, and then the spacer and partition are placed on top. The spacer is made of insulating material, so the heat generated by the N-pole stationary contact after the product is powered on will not damage the magnetic ring wire. The spacer is also very thin, specifically 0.15mm. With the close fit between the partition and the base, a space is formed between the partition and the spacer to accommodate the magnetic ring wire. Before assembling the partition, the magnetic ring wire soldered to the circuit board needs to be placed in place. This arrangement makes the layout more reasonable and facilitates the wiring and installation of the magnetic ring wire. Furthermore, by setting a partition on the partition, a buffer space is formed, which can withstand high-temperature gas and effectively prevent the product from exploding. Setting the partition below the base's exhaust port prevents the partition from blocking the exhaust port, allowing the high-temperature gas to escape smoothly and without obstruction.
[0006] Preferably, the base is provided with a base cylindrical boss, the middle seat is provided with a middle seat cylindrical groove, and the partition plate is provided with a partition cylinder that cooperates with the base cylindrical boss and the middle seat cylindrical groove.
[0007] By adopting the above technical solution, high-temperature gas is generated when the N-pole moving contact and the N-pole stationary contact are connected. Under the action of pressure and electromagnetic field, the high-temperature gas flows downward. When it encounters the separating cylinder, the high-temperature gas is split, and the split high-temperature gas is discharged from the exhaust port of the middle seat and the exhaust port of the base respectively. When the amount of high-temperature gas generated far exceeds the exhaust capacity of the exhaust port, the high-temperature gas will enter the buffer space area. That is, the buffer space area described above can contain the high-temperature gas for buffering. The separating cylinder can also be a columnar body with other cross-sectional shapes, such as rectangular or triangular, etc. Correspondingly, the shapes of the cylindrical boss of the base and the cylindrical groove of the middle seat are also adapted to fit.
[0008] Preferably, the base is provided with a base support surface, a base mating groove, and a base rectangular boss; the middle seat is provided with a middle seat rectangular boss, a middle seat first rectangular groove, a middle seat abutting surface, and a middle seat second rectangular groove; the partition plate is provided with a partition plate lateral rectangular boss, a partition plate support surface, a partition plate rectangular protrusion, and a partition plate groove formed between two adjacent partition plate rectangular protrusions on the side near the middle seat; the partition plate is provided with a partition plate rectangular groove, a partition plate rectangular boss, and a partition plate abutting surface on the side near the base; the partition plate rectangular boss is installed in the base mating groove to limit the partition plate; the middle seat rectangular boss mates with the partition plate groove; the middle seat first rectangular groove mates with the partition plate rectangular protrusion; the middle seat abutting surface abuts against the partition plate support surface; and the partition plate lateral rectangular boss is installed in the middle seat second rectangular groove.
[0009] By adopting the above technical solution, the partition can be installed in a limited position, and the partition can be tightly fitted with the base and the middle seat respectively. The partition separates the high-temperature gas generation area from the circuit board placement position and the magnetic ring placement position, so that the high-temperature gas generated by the N-pole stationary contact will not damage important internal components such as circuit boards, magnetic rings and magnetic ring wires.
[0010] Preferably, the middle seat is provided with an arc-extinguishing chamber and an L-shaped left terminal block. The area between the L-shaped left terminal block and the arc-extinguishing chamber on the middle seat is a high-temperature gas emission zone. A middle seat partition boss is provided at the position of the high-temperature gas emission zone on the middle seat. An upper cover partition boss is provided on the upper cover, which abuts against the middle seat partition boss. The middle seat partition boss and the upper cover partition boss divide the high-temperature gas emission zone into an upper high-temperature gas diversion zone one and a lower high-temperature gas diversion zone two. A support member is provided on the L-shaped left terminal block. The support member is provided with an exhaust vent that communicates with the high-temperature gas diversion zone one. An upper cover exhaust port that communicates with the high-temperature gas diversion zone two is provided on the upper cover.
[0011] By adopting the above technical solution, the high-temperature gas generated by the L-pole stationary contact of the circuit breaker enters the high-temperature gas emission zone through the arc-extinguishing chamber. By setting a middle seat partition boss and a top cover partition boss, the high-temperature gas emission zone is divided into two high-temperature gas diversion zones: zone one and zone two. This allows for the diversion and emission of the high-temperature gas. The high-temperature gas in zone one is discharged through multiple exhaust holes in the support component, while the high-temperature gas in zone two is discharged through the exhaust port on the top cover. This arrangement better mitigates the impact of the high-temperature gas on the exhaust ports, preventing the product casing from cracking. Furthermore, the space inside the L-pole left terminal block can also serve as a buffer space for the high-temperature gas discharge in zone one.
[0012] Preferably, the support member is provided with an installation groove, and the support member is snapped onto the left terminal block of the L pole through the installation groove. The middle seat is provided with a middle seat positioning boss and a middle seat boss mating groove at the position of the high temperature gas emission zone. The upper cover is provided with an upper cover boss mating groove that mates with the middle seat positioning boss, and the upper cover is provided with an upper cover positioning boss that mates with the middle seat boss mating groove.
[0013] By adopting the above technical solution, the support component is specifically made of metal material, such as iron. This ensures that when the L-left terminal block is connected to an external busbar and wires, both the upper and lower sides of the L-left terminal block will be stressed. Since traditionally designed plastic components deform under high temperatures, the metal support component is less prone to deformation, thus providing better support. Furthermore, the mating grooves of the center seat positioning boss and the top cover boss, combined with the abutting arrangement of the center seat partition boss and the top cover partition boss, achieve a tight fit between the top cover and the center seat, thereby dividing the high-temperature gas emission area into two parts.
[0014] The beneficial effects of this utility model are: This utility model has a reasonable structural design, which facilitates the discharge of high-temperature gases. Furthermore, the proper arrangement of the magnetic ring wires prevents interference from other components, effectively optimizing product performance and improving the safety factor. Attached Figure Description
[0015] Figure 1 This is a cross-sectional view of a specific embodiment of the present utility model; Figure 2 This is a schematic diagram of the internal structure of a specific embodiment of the present utility model. Figure 1 ; Figure 3 This is a schematic diagram of the internal structure of a specific embodiment of the present utility model. Figure 2 ; Figure 4 This is a schematic diagram illustrating the structure of the partition in a specific embodiment of the present invention; Figure 5 This is a schematic diagram illustrating the structure of the partition in a specific embodiment of the present invention; Figure 6 This is a schematic diagram showing a partial structure of the base according to a specific embodiment of the present utility model; Figure 7 This is a schematic diagram illustrating a partial structure of the central seat in a specific embodiment of this utility model. Figure 1 ; Figure 8 This is a schematic diagram illustrating a partial structure of the central seat in a specific embodiment of this utility model. Figure 2 ; Figure 9 This is a schematic diagram illustrating a partial structure of the top cover in a specific embodiment of this utility model; Figure 10 This is a schematic diagram illustrating the structure of the support component in a specific embodiment of this utility model.
[0016] In the diagram: c, magnetic ring conductor; f, accommodating space; g, high-temperature gas generation area; h, buffer space area; i, high-temperature gas emission area; j, high-temperature gas diversion area one; k, high-temperature gas diversion area two; 200, circuit board; 500, arc-extinguishing chamber; 900, magnetic ring; 1, base; 11, base exhaust port; 12, base cylindrical boss; 13, base support surface; 14, base mating groove; 15, base rectangular boss; 2, middle seat; 21, middle seat exhaust port; 22, middle seat cylindrical groove; 23, middle seat rectangular boss; 24, middle seat first rectangular groove; 25, middle seat contact surface; 26, middle seat second rectangular groove. 27. Middle seat partition boss; 28. Middle seat positioning boss; 29. Middle seat boss mating groove; 3. Top cover; 31. Top cover partition boss; 32. Top cover exhaust port; 33. Top cover boss mating groove; 34. Top cover positioning boss; 4. N pole stationary contact; 5. Partition plate; 51. Partition section; 52. Partition cylinder; 53. Partition plate lateral rectangular boss; 54. Partition plate support surface; 55. Partition plate rectangular protrusion; 56. Partition plate groove; 57. Partition plate rectangular slot; 58. Partition plate rectangular boss; 59. Partition plate contact surface; 6. Partition plate; 8. L pole left terminal block; 9. Support component; 91. Exhaust vent hole; 92. Mounting groove. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] like Figure 1-10 As shown, a circuit breaker utilizing exhaust and wire layout includes a base 1, a middle seat 2, and a top cover 3. The middle seat 2 is located between the base 1 and the top cover 3. The base 1 is provided with an N-pole stationary contact 4, a circuit board 200, and a magnetic ring 900. A magnetic ring wire c connects the magnetic ring 900 and the circuit board 200. The position of the N-pole stationary contact 4 on the base 1 is a high-temperature gas generation zone g. The base 1 is provided with a base exhaust port 11, and the middle seat 2 is provided with a corresponding middle seat exhaust port 21. The high-temperature gas in the high-temperature gas generation zone g is discharged from the base exhaust port 11 and the middle seat exhaust port 21. A partition 5 and a partition plate 6 are provided on the base 1 above the N-pole stationary contact 4. The partition 5 is positioned above the partition plate 6, and a accommodating space f is formed between the partition 5 and the partition plate 6 for the magnetic ring wire c to pass through. A dividing part 51 is provided on the partition 5, which divides the base 1 to form a buffer space zone h. The partition 5 is positioned below the base exhaust port 11.
[0019] By adopting the above technical solution, during assembly, the N-pole stationary contact 4 is first placed on the base 1, and then the spacer 6 and the partition 5 are placed on top. The spacer 6 is made of insulating material, so the heat generated by the N-pole stationary contact 4 will not damage the magnetic ring 900 wire c after the product is powered on. The spacer 6 has a very thin thickness, specifically 0.15mm. With the close cooperation between the partition 5 and the base 1, a space f is formed between the partition 5 and the spacer 6 to accommodate the magnetic ring wire c. Before assembling the partition 5, the magnetic ring wires c soldered to the circuit board 200 need to be placed properly before assembling the partition 5. This arrangement makes the layout more reasonable and facilitates the wiring and installation of the magnetic ring wires c. Furthermore, by setting the partition 51 on the partition 5, a buffer space h is formed. The buffer space h can bear the high-temperature gas and buffer it, effectively preventing the product from exploding. By setting the partition 5 below the base exhaust port 11, the partition 5 will not block the base exhaust port 11, allowing the high-temperature gas to be discharged smoothly and without obstruction.
[0020] A cylindrical boss 12 is provided on the base 1, a cylindrical groove 22 is provided on the middle seat 2, and a partition cylinder 52 is provided on the partition plate 5 to cooperate with the cylindrical boss 12 and the cylindrical groove 22. When the N-pole moving contact and the N-pole stationary contact 4 are connected, high-temperature gas is generated. Under the action of pressure and electromagnetic field, the high-temperature gas will flow downward. When it encounters the partition cylinder 52, the high-temperature gas is split. The split high-temperature gas is discharged from the middle seat exhaust port 21 and the base exhaust port 11 respectively. When the amount of high-temperature gas generated far exceeds the exhaust capacity, the high-temperature gas will enter the buffer space area h. That is, the buffer space area h can bear the high-temperature gas for buffering. The partition cylinder 52 can also be a columnar body with other cross-sectional shapes, such as rectangular or triangular, etc. Correspondingly, the shapes of the cylindrical boss 12 and the cylindrical groove 22 are also adapted to fit.
[0021] Furthermore, the base 1 is provided with a base support surface 13, a base mating groove 14, and a base rectangular boss 15. The middle seat is provided with a middle seat rectangular boss 23, a middle seat first rectangular groove 24, a middle seat contact surface 25, and a middle seat second rectangular groove 26. The side of the partition 5 near the middle seat 2 is provided with a partition lateral rectangular boss 53, a partition support surface 54, a partition rectangular protrusion 55, and a partition groove 56 formed between two adjacent partition rectangular protrusions 55. The partition 5 is close to A rectangular groove 57, a rectangular boss 58, and a contact surface 59 are provided on the side near the base 1. The rectangular boss 58 is installed in the base's mating groove 14 to limit the position of the partition 5. The rectangular boss 23 of the middle seat mates with the partition groove 56. The first rectangular groove 24 of the middle seat mates with the rectangular protrusion 55 of the partition. The contact surface 25 of the middle seat abuts against the partition support surface 54. The lateral rectangular boss 53 of the partition is installed in the second rectangular groove 26 of the middle seat. This arrangement allows for the limited installation of the partition 5 and ensures that the partition 5 can fit tightly with the base 1 and the middle seat 2 respectively. The partition 5 separates the high-temperature gas generation area g from the placement positions of the circuit board 200 and the magnetic ring 900, preventing the high-temperature gas generated by the N-pole stationary contact 4 from damaging important internal components such as the circuit board 200, the magnetic ring 900, and the magnetic ring wire c.
[0022] An arc-extinguishing chamber 500 and an L-left terminal block 8 are provided on the middle seat 2. The high-temperature gas emission zone i is located between the L-left terminal block 8 and the arc-extinguishing chamber 500 on the middle seat 2. A middle seat partition boss 27 is provided on the middle seat 2 at the position of the high-temperature gas emission zone i. An upper cover partition boss 31 is provided on the upper cover 3, which abuts against the middle seat partition boss 27. The middle seat partition boss 27 and the upper cover partition boss 31 divide the high-temperature gas emission zone i into an upper high-temperature gas diversion zone j and a lower high-temperature gas diversion zone k. A support member 9 is provided on the L-left terminal block 8. An exhaust port 91 connected to the high-temperature gas diversion zone j is provided on the support member 9. An upper cover exhaust port 32 connected to the high-temperature gas diversion zone k is provided on the upper cover 3. Because the high-temperature gas generated by the L-pole stationary contact of the circuit breaker enters the high-temperature gas emission zone i through the arc-extinguishing chamber 500, the high-temperature gas emission zone i is divided into high-temperature gas diversion zone j and high-temperature gas diversion zone k by the middle seat dividing boss 27 and the upper cover dividing boss 31, thus diverting the high-temperature gas for emission. The high-temperature gas in high-temperature gas diversion zone j is discharged from multiple exhaust holes 91 of the support member 9, while the high-temperature gas in high-temperature gas diversion zone k is discharged from the exhaust port 32 of the upper cover. This arrangement can better mitigate the impact of high-temperature gas on the exhaust port and prevent the product casing from cracking. The space inside the L-pole left terminal block 8 can also serve as a buffer space for the high-temperature gas emission in high-temperature gas diversion zone j.
[0023] Furthermore, the support member 9 is provided with a mounting groove 92, through which the support member 9 is snapped onto the L-left terminal block 8. The middle seat, located in the high-temperature gas emission zone i, is provided with a middle seat positioning boss 28 and a middle seat boss mating groove 29. The upper cover 3 is provided with an upper cover boss mating groove 33 that mates with the middle seat positioning boss 28, and an upper cover positioning boss 34 that mates with the middle seat boss mating groove 29. The support member 9 is specifically made of metal, such as iron, so that when the L-left terminal block 8 is connected to external busbars and wires, both the upper and lower sides of the L-left terminal block 8 will be subjected to force. Since traditionally designed plastic parts will deform under high-temperature conditions, the metal support member 9 is less prone to deformation, thus providing better support. Furthermore, the mating arrangement of the middle seat positioning boss 28, the upper cover boss mating groove 33, the middle seat boss mating groove 29, and the upper cover positioning boss 34, combined with the abutting arrangement of the middle seat dividing boss 27 and the upper cover dividing boss 31, can achieve a tight fit between the upper cover 3 and the middle seat 2, thereby dividing the high-temperature gas emission zone i into two parts.
[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A circuit breaker utilizing exhaust and wire layout, comprising a base (1), a middle seat (2), and a top cover (3), wherein the middle seat (2) is located between the base (1) and the top cover (3), the base (1) is provided with an N-pole stationary contact (4), a circuit board (200), and a magnetic ring (900), a magnetic ring wire (c) connecting the magnetic ring (900) and the circuit board (200), the position of the N-pole stationary contact (4) on the base (1) is a high-temperature gas generation zone (g), the base (1) is provided with a base exhaust port (11), and the middle seat (2) is provided with a corresponding middle seat exhaust port (21), the high-temperature gas in the high-temperature gas generation zone (g) is discharged from the base exhaust port (11) and the middle seat exhaust port (21), characterized in that, A partition (5) and a spacer (6) are provided on the base (1) above the N-pole stationary contact (4). The partition (5) is located above the spacer (6). A space (f) for the magnetic ring wire (c) to pass through is formed between the partition (5) and the spacer (6). A partition (51) is provided on the partition (5). The partition (51) divides the base (1) into a buffer space area (h). The partition (5) is located below the base exhaust port (11).
2. A circuit breaker utilizing exhaust and conductor layout according to claim 1, wherein an arc-extinguishing chamber (500) and an L-position left terminal block (8) are provided on the middle seat (2), a high-temperature gas emission zone (i) is located between the L-position left terminal block (8) and the arc-extinguishing chamber (500) on the middle seat (2), a middle seat partition boss (27) is provided at the position of the high-temperature gas emission zone (i) on the middle seat (2), and an upper cover partition boss (3) is provided on the upper cover (3) abutting against the middle seat partition boss (27). The platform (31), the middle seat partition boss (27) and the upper cover partition boss (31) divide the high temperature gas emission zone (i) into the upper high temperature gas diversion zone one (j) and the lower high temperature gas diversion zone two (k). The left terminal block (8) of L is provided with a support member (9), the support member (9) is provided with an exhaust hole (91) connected to the high temperature gas diversion zone one (j), and the upper cover (3) is provided with an upper cover exhaust port (32) connected to the high temperature gas diversion zone two (k).
3. A circuit breaker utilizing venting and conductor layout according to claim 1 or 2, characterized in that, The base (1) is provided with a base cylindrical boss (12), the middle seat (2) is provided with a middle seat cylindrical groove (22), and the partition (5) is provided with a partition cylinder (52) that cooperates with the base cylindrical boss (12) and the middle seat cylindrical groove (22).
4. A circuit breaker utilizing venting and conductor layout according to claim 3, characterized in that, The base (1) is provided with a base support surface (13), a base mating groove (14), and a base rectangular boss (15). The middle seat (2) is provided with a middle seat rectangular boss (23), a middle seat first rectangular groove (24), a middle seat contact surface (25), and a middle seat second rectangular groove (26). The partition (5) is provided with a partition side rectangular boss (53), a partition support surface (54), a partition rectangular protrusion (55), and a partition groove (56) formed between two adjacent partition rectangular protrusions (55). A rectangular groove (57), a rectangular boss (58), and a contact surface (59) for the partition are provided on the side near the base. The rectangular boss (58) for the partition is installed in the groove (14) of the base to limit the partition (5). The rectangular boss (23) of the middle seat cooperates with the groove (56) of the partition. The first rectangular groove (24) of the middle seat cooperates with the rectangular protrusion (55) of the partition. The contact surface (25) of the middle seat abuts against the support surface (54) of the partition. The lateral rectangular boss (53) of the partition is installed in the second rectangular groove (26) of the middle seat.
5. A circuit breaker utilizing venting and conductor layout according to claim 2, characterized in that, The support member (9) is provided with an installation groove (92), and the support member (9) is snapped onto the L-pole left terminal block (8) through the installation groove (92). The middle seat (2) is provided with a middle seat positioning boss (28) and a middle seat boss mating groove (29) at the position of the high temperature gas emission zone (i). The upper cover (3) is provided with an upper cover boss mating groove (33) that mates with the middle seat positioning boss (28), and the upper cover (3) is provided with an upper cover positioning boss (34) that mates with the middle seat boss mating groove (29).