Exhaust structure of alternating current circuit breaker
By adopting a multi-channel exhaust structure in the AC circuit breaker, the problem of arc gas re-converging at the outlet is solved, achieving effective separation and cooling of the arc, improving the breaking performance and safety of the circuit breaker, and saving space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GACIA ELECTRICAL APPLIANCE
- Filing Date
- 2026-04-24
- Publication Date
- 2026-05-26
AI Technical Summary
The existing arc-extinguishing gas outlet structure of AC circuit breakers has the possibility of arc gas re-aggregating at the outlet, which reduces the safety of the circuit breaker and occupies a large space.
The system employs a multi-channel exhaust structure, including a first channel, a second channel, a third channel, and a fourth channel, which separate the arc gas from the left and right sides respectively. The arc gas is guided to different channels by the first, second, and third guide plates, and multiple outlets are formed by the guide plates and baffles to avoid circulating airflow and increase the separation distance to fully cool the arc.
It achieves effective separation and cooling of arc gas, improves the breaking performance of the circuit breaker, reduces arc energy, saves space, and improves safety.
Smart Images
Figure CN224288189U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit breakers, specifically to an exhaust structure for an AC circuit breaker. Background Technology
[0002] Existing arc-extinguishing gas venting structures include an arc-extinguishing mechanism, with a vent on the circuit breaker housing outside the mechanism. A venting channel is formed between the vent and the arc-extinguishing mechanism, and multiple baffles can be installed within the venting channel to separate different arc gases. In operation, the arc gas exits from the arc-extinguishing mechanism and is separated by the baffles into multiple airflows, which then flow separately within the venting channel. When these airflows reach the vicinity of the vent, they converge again and exit together from the single vent. Since there is only one vent, regardless of how the arc gas is separated and flows after exiting the arc-extinguishing mechanism, it will always converge again at the vent. This increases the likelihood of electrons with large potential differences converging with the airflow and causing a discharge, reducing the safety of the circuit breaker and also resulting in a large space requirement. Utility Model Content
[0003] To overcome the shortcomings of the prior art, this utility model provides a space-saving and safe exhaust structure for an AC circuit breaker.
[0004] The technical solution adopted by this utility model is as follows: an exhaust structure for an AC circuit breaker, which includes a housing and an arc-extinguishing chamber. The housing includes a middle cover and a left cover and a right cover installed on both sides of the middle cover. The middle cover is provided with a plurality of first air guide plates that guide the gas coming out of the arc-extinguishing chamber to the left and right sides. The middle cover and the left cover cooperate to form a first exhaust channel. The middle cover and the right cover cooperate to form a second exhaust channel, a third exhaust channel and a fourth exhaust channel. The bottom of the side wall of the housing is provided with a first outlet connecting the first channel and a second outlet connecting the second channel and the fourth channel. The upper surface of the housing is provided with a third outlet connecting the third channel.
[0005] The first air guide plate is disposed on both sides of the middle cover, and two adjacent first air guide plates are staggered vertically; the left cover is provided with several second air guide plates that are spaced apart and connected to the first air guide plate, and the right cover is provided with several third air guide plates that are spaced apart and connected to the first air guide plate.
[0006] The middle cover and the right cover are respectively provided with a first baffle and a second baffle that cooperate to form a fourth channel. The right cover is provided with a third baffle. The first baffle and the third baffle cooperate to form a second channel.
[0007] The first baffle of the middle cover is integrally formed with one of the first air guide plates, and the first baffle of the right cover is integrally formed with one of the third air guide plates.
[0008] The middle cover and the right cover cooperate to form a cavity for accommodating the wire clamp. The cavity has a notch and communicates with the second channel. The cavity and the notch form the third channel.
[0009] The middle cover is provided with a fourth baffle, and the inner wall surfaces of the middle cover and the left cover, together with the fourth baffle, form a first channel.
[0010] The middle cover has a first guide plate in the fourth channel, and the right cover has a second guide plate in the fourth channel. The first guide plate and the second guide plate are staggered.
[0011] The middle cover is provided with a third guide plate in the second channel, and the right cover is provided with a fourth guide plate in the second channel. The third guide plate and the fourth guide plate are offset from each other.
[0012] The beneficial effects of this utility model are: the arc-extinguishing chamber in this technical solution generates an electric arc and gas, which can be separated into two parts by the middle cover. The left side is vented by the first channel, and the right side is vented by the second, third and fourth channels, for a total of three exhaust outlets. This avoids the formation of circulating airflow inside the product, and the separation distance is large enough to fully cool the electric arc, reduce the electric arc energy, and improve the overall breaking performance of the product. It also has the advantages of saving space and good safety. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the exhaust structure of the AC circuit breaker according to an embodiment of the present invention.
[0014] Figure 2 This is a schematic diagram of the left cover.
[0015] Figure 3 This is a schematic diagram of the right cover.
[0016] Figure 4 This is a schematic diagram of the structure on the left side of the middle cover.
[0017] Figure 5 This is a schematic diagram of the structure on the right side of the middle cover.
[0018] Figure 6 This is a schematic diagram of the structure of the middle cover.
[0019] Figure 7 This is a schematic diagram of the structure of the first guide plate and the second guide plate. Detailed Implementation
[0020] The embodiments of this utility model will be further described below with reference to the accompanying drawings:
[0021] As shown in the figure, an exhaust structure for an AC circuit breaker includes a housing and an arc-extinguishing chamber 1. The housing includes a middle cover 2 and a left cover 3 and a right cover 4 installed on both sides of the middle cover 2. The middle cover 2 is provided with several first air guide plates 21 that guide the gas from the arc-extinguishing chamber 1 to the left and right sides. The middle cover 2 and the left cover 3 cooperate to form a first exhaust channel 5. The middle cover 2 and the right cover 4 cooperate to form a second exhaust channel 6, a third exhaust channel 7, and a fourth exhaust channel 8. The bottom of the side wall of the housing is provided with a first outlet 51 connecting the first channel 5 and a second outlet 61 connecting the second channel 6 and the fourth channel 8. The upper surface of the housing is provided with a third outlet 71 connecting the third channel 7. In this technical solution, the arc-extinguishing chamber generates an electric arc and gas, which can be separated into two parts by the middle cover. The left side is exhausted by the first channel, and the right side is exhausted by the second, third, and fourth channels, for a total of three exhaust outlets. This avoids the formation of circulating airflow inside the product, and the separation distance is large enough to fully cool the electric arc, reduce the arc energy, and improve the overall breaking performance of the product. It has the advantages of saving space and good safety.
[0022] The first air guide plate 21 is disposed on both sides of the middle cover 2, and two adjacent first air guide plates 21 are staggered vertically; the left cover 3 is provided with several second air guide plates 31 that are spaced apart and connected to the first air guide plate 21, and the right cover 4 is provided with several third air guide plates 41 that are spaced apart and connected to the first air guide plate 21. The first air guide plate cooperates with the second air guide plates and third air guide plates on both sides to guide the gas in the arc-extinguishing chamber to both sides of the middle cover. The grid of the arc-extinguishing chamber divides the arc-extinguishing chamber into several layers. The first air guide plate, the second air guide plate and the third air guide plate guide the gas in the adjacent two layers of the arc-extinguishing chamber to the L and N poles of the product.
[0023] The middle cover 2 and the right cover 4 are respectively provided with a first baffle 81 and a second baffle 82 that cooperate to form a fourth channel 8. The right cover 4 is provided with a third baffle 42. The first baffle 81 and the third baffle 42 cooperate to form a second channel 6. The gas in the second channel and the fourth channel is discharged from the second outlet.
[0024] The first baffle 81 of the middle cover 2 is integrally formed with one of the first air guide plates 21, and the first baffle 81 of the right cover 4 is integrally formed with one of the third air guide plates 41. The first baffle of the middle cover and the first baffle of the right cover are flush, separating the second channel and the fourth channel.
[0025] The middle cover 2 and the right cover 4 cooperate to form a cavity 73 for accommodating the wire clamp. The cavity 73 has a notch 72 and is connected to the second channel 6. The cavity 73 and the notch 72 form the third channel 7. The gas in the arc-extinguishing chamber flows upward along the third baffle, enters the cavity from the notch, and is then exhausted from the third outlet.
[0026] The middle cover 2 is provided with a fourth baffle 52. The inner wall surfaces of the middle cover 2 and the left cover 3, together with the fourth baffle 52, form a first channel 5. Gas is guided to the first outlet along the fourth baffle.
[0027] The middle cover 2 has a first guide plate 22 in the fourth channel 8, and the right cover 4 has a second guide plate 43 in the fourth channel 8. The first guide plate 22 and the second guide plate 43 are staggered. The middle cover 2 has a third guide plate 23 in the second channel 6, and the right cover 4 has a fourth guide plate 44 in the second channel 6. The third guide plate 23 and the fourth guide plate 44 are staggered. The staggered arrangement of the first and second guide plates and the staggered arrangement of the third guide plate 23 and the fourth guide plate 44 allows the gas to flow in a curved manner, performing arc extinguishing treatment and improving the safety of gas discharge.
[0028] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0030] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.
Claims
1. An exhaust structure of an alternating current circuit breaker, characterized by: It includes a shell and an arc-extinguishing chamber (1). The shell includes a middle cover (2) and a left cover (3) and a right cover (4) installed on both sides of the middle cover (2). The middle cover (2) is provided with several first gas guide plates (21) that guide the gas coming out of the arc-extinguishing chamber (1) to the left and right sides. The middle cover (2) and the left cover (3) cooperate to form a first exhaust channel (5). The middle cover (2) and the right cover (4) cooperate to form a second exhaust channel (6), a third channel (7) and a fourth channel (8). The bottom of the side wall of the shell is provided with a first outlet (51) that connects to the first channel (5) and a second outlet (61) that connects to the second channel (6) and the fourth channel (8). The upper surface of the shell is provided with a third outlet (71) that connects to the third channel (7).
2. The exhaust structure of the AC circuit breaker according to claim 1, characterized in that: The first air guide plate (21) is arranged on both sides of the middle cover (2), and two adjacent first air guide plates (21) are staggered vertically; the left cover (3) is provided with several second air guide plates (31) that are spaced apart and connected to the first air guide plate (21), and the right cover (4) is provided with several third air guide plates (41) that are spaced apart and connected to the first air guide plate (21).
3. The exhaust structure of the AC circuit breaker according to claim 2, characterized in that: The middle cover (2) and the right cover (4) are respectively provided with a first baffle (81) and a second baffle (82) to form a fourth channel (8). The right cover (4) is provided with a third baffle (42). The first baffle (81) and the third baffle (42) cooperate to form a second channel (6).
4. The exhaust structure of the AC circuit breaker according to claim 3, characterized in that: The first baffle (81) of the middle cover (2) is integrally formed with one of the first air guide plates (21), and the first baffle (81) of the right cover (4) is integrally formed with one of the third air guide plates (41).
5. The exhaust structure of the AC circuit breaker according to claim 1, characterized in that: The middle cover (2) and the right cover (4) cooperate to form a cavity (73) for accommodating the wire clamp. The cavity (73) has a notch (72) and is connected to the second channel (6). The cavity (73) and the notch (72) form the third channel (7).
6. The exhaust structure of the AC circuit breaker according to claim 1, characterized in that: The middle cover (2) is provided with a fourth baffle (52), and the inner wall surfaces of the middle cover (2) and the left cover (3) and the fourth baffle (52) cooperate to form a first channel (5).
7. The exhaust structure of the AC circuit breaker according to claim 1, characterized in that: The middle cover (2) has a first guide plate (22) in the fourth channel (8), and the right cover (4) has a second guide plate (43) in the fourth channel (8). The first guide plate (22) and the second guide plate (43) are staggered.
8. The exhaust structure of the AC circuit breaker according to claim 1, characterized in that: The middle cover (2) is provided with a third guide plate (23) in the second channel (6), and the right cover (4) is provided with a fourth guide plate (44) in the second channel (6). The third guide plate (23) and the fourth guide plate (44) are offset.