A residual current operated circuit breaker

Abstract

The utility model provides a kind of residual current operating circuit breaker, comprising: circuit breaker body, with the first chamber and the second chamber separated by middle cover, first chamber and the second chamber are equipped with first arc-extinguishing chamber and second arc-extinguishing chamber respectively;Middle cover, shaping has the aperture of the first chamber and the second chamber intercommunication, and aperture is located the arc discharge port side of first arc-extinguishing chamber and second arc-extinguishing chamber;Circuit board, it is located in first chamber, and located the arc discharge port side of first arc-extinguishing chamber;Exhaust plate, it is installed in the second chamber, and located the side of middle cover away from circuit board, exhaust plate has the first exhaust passage with aperture intercommunication, and the second exhaust passage with the arc discharge port intercommunication of second arc-extinguishing chamber, first exhaust passage and second exhaust passage are mutually separated. Like this, it is guaranteed that the high-temperature gas of double arc-extinguishing chamber is independently discharged, and it is formed by aperture that collaborative exhaust path, significantly reduce space occupation, fit miniaturization demand.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, specifically to a residual current operated circuit breaker. Background Technology

[0002] Residual current operated circuit breakers (RCCBs) are critical safety devices in low-voltage power distribution systems. Their core function is to quickly disconnect faulty circuits by detecting the current difference between the live and neutral wires. To improve breaking capacity, both the live and neutral wires need to be equipped with independent arc-extinguishing chambers. However, installing a circuit board with dual arc-extinguishing chambers on top of each other would significantly increase the product size, which does not meet the requirements for product miniaturization. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to overcome the defect of large product size in the prior art, thereby providing a miniaturized residual current operated circuit breaker.

[0004] Therefore, this utility model provides a residual current operated circuit breaker, including a circuit breaker body, a middle cover, a circuit board, and an exhaust plate. The circuit breaker body has a first chamber and a second chamber separated by the middle cover, and a first arc-extinguishing chamber and a second arc-extinguishing chamber are respectively installed in the first chamber and the second chamber. The middle cover has an opening formed to connect the first chamber and the second chamber, and the opening is located on the arc-extinguishing port side of the first arc-extinguishing chamber and the second arc-extinguishing chamber. The circuit board is disposed in the first chamber and is located on the arc-extinguishing port side of the first arc-extinguishing chamber. The exhaust plate is installed in the second chamber and is located on the side of the middle cover away from the circuit board. The exhaust plate has a first exhaust channel communicating with the opening and a second exhaust channel communicating with the arc-extinguishing port of the second arc-extinguishing chamber. The first exhaust channel and the second exhaust channel are separated from each other.

[0005] The exhaust plate includes a first partition and a second partition connected in sequence. The first partition is located near the arc exhaust port of the second arc extinguishing chamber and extends upward at an angle away from the opening. The second partition is located away from the arc exhaust port of the second arc extinguishing chamber.

[0006] The middle cover has a step adjacent to the arc discharge port of the second arc extinguishing chamber, and the end of the first partition is provided with a stop extending to abut against the step.

[0007] The circuit breaker body has a first exhaust port located on its side and communicating with the first exhaust channel, and a second exhaust port located on its bottom surface and communicating with the second exhaust channel.

[0008] The middle cover is formed with a third partition located between the circuit board and the first arc-extinguishing chamber.

[0009] The technical solution of this utility model has the following advantages: 1. The residual current operated circuit breaker provided by this utility model installs both the circuit board and the exhaust plate on the arc-extinguishing chamber side of the arc-extinguishing chamber and separates them by a middle cover. The middle cover is formed with an opening that connects the first chamber and the second chamber, and the opening is located on the arc-extinguishing chamber side of the first and second arc-extinguishing chambers. The exhaust plate has a first exhaust channel that connects to the opening and a second exhaust channel that connects to the arc-extinguishing chamber of the second arc-extinguishing chamber. This ensures that the high-temperature gas of the two arc-extinguishing chambers is discharged independently, and a collaborative exhaust path is formed by the opening, which significantly reduces the space occupation and meets the requirements of miniaturization.

[0010] 2. The residual current operated circuit breaker provided by this utility model has an exhaust plate comprising a first partition and a second partition connected in sequence. The first partition is located near the arc extinguishing port of the second arc extinguishing chamber and extends upward at an angle away from the hole. This makes full use of the upper space of the second chamber, avoids interference with the middle cover or other components, and achieves efficient current conduction in a limited space.

[0011] 3. The residual current operated circuit breaker provided by this utility model has a step in the middle cover adjacent to the arc extinguishing port of the second arc extinguishing chamber, and the end of the first partition is provided with a stop block extending to abut against the step. The protruding structure of the step cooperates with the stop block to block the arcing of ionized gas between the two arc extinguishing chambers and reduce the risk of short circuit. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a perspective view of the residual current operated circuit breaker of this utility model; Figure 2 for Figure 1 Cross-sectional view; Figure 3 This is a schematic diagram of the exploded structure of a residual current operated circuit breaker. Figure 4 This is a 3D view of the cover and circuit board; Figure 5 This is a three-dimensional view of the middle cover; Figure 6 This is a first perspective view of the exhaust plate; Figure 7 This is a second 3D view of the exhaust panel after it has been flipped over.

[0014] Explanation of reference numerals in the attached drawings: 1. Circuit breaker body; 2. Middle cover; 3. First chamber; 4. Second chamber; 5. First arc-extinguishing chamber; 6. Second arc-extinguishing chamber; 7. Opening; 8. Circuit board; 9. Exhaust plate; 10. Step; 11. First exhaust channel; 12. Second exhaust channel; 13. First partition; 14. Second partition; 15. Stop; 16. First exhaust port; 17. Second exhaust port; 18. Third partition. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "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, and 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 of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] 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.

[0018] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] Example This embodiment provides a residual current operated circuit breaker, such as... Figure 1 , Figure 2 and Figure 3 As shown, it includes the circuit breaker body 1, the circuit board 8, and the exhaust plate 9.

[0020] Circuit breaker body 1, such as Figure 2As shown, it has a first chamber 3 and a second chamber 4 separated by a middle cover 2. A first arc-extinguishing chamber 5 and a second arc-extinguishing chamber 6 are respectively installed in the first chamber 3 and the second chamber 4. Figure 5 As shown, the middle cover 2 is formed with an opening 7 that connects the first chamber 3 and the second chamber 4, and the opening 7 is located on the arc discharge port side of the first arc extinguishing chamber 5 and the second arc extinguishing chamber 6.

[0021] Circuit board 8 is disposed within the first chamber 3 and located on one side of the arc-extinguishing port of the first arc-extinguishing chamber 5, such as... Figure 4 As shown, the middle cover 2 is formed with a third partition 18 located between the circuit board 8 and the first arc-extinguishing chamber 5.

[0022] The exhaust plate 9 is installed inside the second chamber 4 and is located on the side of the middle cover 2 away from the circuit board 8, such as... Figure 2 As shown, the exhaust plate 9 has a first exhaust channel 11 communicating with the opening 7 and a second exhaust channel 12 communicating with the arc discharge port of the second arc-extinguishing chamber 6. The first exhaust channel 11 and the second exhaust channel 12 are separated from each other. In this embodiment, the exhaust plate 9 includes a first partition 13 and a second partition 14 connected in sequence. The first partition 13 is disposed adjacent to the arc discharge port of the second arc-extinguishing chamber 6 and extends obliquely upward in a direction away from the opening 7. The second partition 14 is disposed away from the arc discharge port of the second arc-extinguishing chamber 6. The middle cover 2 has a step 10 adjacent to the arc discharge port of the second arc-extinguishing chamber 6, as shown in the figure. Figure 6 and Figure 7 As shown, the end of the first partition 13 is provided with a stop 15 extending to abut against the step 10. The circuit breaker body 1 has a first exhaust port 16 located on its side and communicating with the first exhaust passage 11, and a second exhaust port 17 located on its bottom surface and communicating with the second exhaust passage 12.

[0023] The residual current operated circuit breaker provided by this utility model has its circuit board 8 and exhaust plate 9 both installed on the arc-extinguishing chamber side of the arc-extinguishing chamber and separated by a middle cover 2. The middle cover 2 has an opening 7 that connects the first chamber 3 and the second chamber 4, and the opening 7 is located on the arc-extinguishing chamber side of the first arc-extinguishing chamber 5 and the second arc-extinguishing chamber 6. The exhaust plate 9 has a first exhaust channel 11 that connects to the opening 7 and a second exhaust channel 12 that connects to the arc-extinguishing chamber 6. This ensures that the high-temperature gas of the two arc-extinguishing chambers is discharged independently, and forms a cooperative exhaust path through the opening, which significantly reduces the space occupation and meets the requirements of miniaturization.

[0024] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A residual current operated circuit breaker, characterized in that, include: The circuit breaker body (1) has a first chamber (3) and a second chamber (4) separated by a middle cover (2), and a first arc-extinguishing chamber (5) and a second arc-extinguishing chamber (6) are respectively installed in the first chamber (3) and the second chamber (4); The middle cover (2) is formed with an opening (7) that connects the first chamber (3) and the second chamber (4), and the opening (7) is located on the side of the arc discharge port of the first arc extinguishing chamber (5) and the second arc extinguishing chamber (6); The circuit board (8) is disposed in the first chamber (3) and located on the side of the arc discharge port of the first arc extinguishing chamber (5); An exhaust plate (9) is installed in the second chamber (4) and located on the side of the middle cover (2) away from the circuit board (8). The exhaust plate (9) has a first exhaust channel (11) communicating with the opening (7) and a second exhaust channel (12) communicating with the arc discharge port of the second arc extinguishing chamber (6). The first exhaust channel (11) and the second exhaust channel (12) are separated from each other.

2. The residual current operated circuit breaker according to claim 1, characterized in that, The exhaust plate (9) includes a first partition (13) and a second partition (14) connected in sequence. The first partition (13) is located near the arc discharge port of the second arc extinguishing chamber (6) and extends upward at an angle away from the opening (7). The second partition (14) is located away from the arc discharge port of the second arc extinguishing chamber (6).

3. The residual current operated circuit breaker according to claim 2, characterized in that, The middle cover (2) has a step (10) adjacent to the arc discharge port of the second arc extinguishing chamber (6), and the end of the first partition (13) is provided with a stop (15) extending to abut against the step (10).

4. The residual current operated circuit breaker according to claim 1, characterized in that, The circuit breaker body (1) has a first exhaust port (16) located on its side and communicating with the first exhaust channel (11), and a second exhaust port (17) located on its bottom and communicating with the second exhaust channel (12).

5. The residual current operated circuit breaker according to claim 1, characterized in that, The middle cover (2) is formed with a third partition (18) located between the circuit board (8) and the first arc-extinguishing chamber (5).

Images