A heat dissipation structure of a vacuum circuit breaker and a vacuum circuit breaker

Abstract

The utility model relates to the technical field of circuit breaker, especially to a heat dissipation structure of vacuum circuit breaker and vacuum circuit breaker. The heat dissipation structure of vacuum circuit breaker provided by the utility model, vacuum circuit breaker includes vacuum bubble subassembly, and the heat dissipation structure includes: the shell of setting in the outside of vacuum bubble subassembly, along the contact movement direction of vacuum bubble subassembly, the shell has two end faces corresponding with the opposite ends of vacuum bubble subassembly respectively, two end faces all are provided with the heat dissipation area, and at least one heat dissipation port is provided in the heat dissipation area. Since setting the heat dissipation port in the opposite ends of shell, the heat generated in the inside of shell can be discharged through two end heat dissipation ports, effectively improves the heat dissipation effect, thereby reduces the temperature rise of product.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a heat dissipation structure for a vacuum circuit breaker and a vacuum circuit breaker. Background Technology

[0002] Existing low-voltage electrical circuit breakers are typically air-cooled circuit breakers. Air-cooled circuit breakers use air as the medium for arc extinguishing. In air-cooled circuit breakers, the casing is the last line of defense, preventing the spread of ionized arc gases. The airflow is guided in a predetermined direction by the air outlet of the arc-extinguishing chamber, thereby drawing the arc energy out of the circuit breaker and completing the arc extinguishing process. To ensure effective arc extinguishing, the casing needs to be as sealed as possible, leaving an air outlet only after arc extinguishing.

[0003] To improve the arc extinguishing effect, a vacuum bulb is placed inside the product casing to form a vacuum circuit breaker. The arc extinguishing method of the vacuum circuit breaker is different from that of the air circuit breaker. Its moving and stationary contacts are placed in the vacuum bulb, and a vacuum is drawn into the vacuum bulb. Because the medium becomes a vacuum, the arc extinguishing effect is greatly improved.

[0004] However, the existing vacuum circuit breakers still use the same casing design as the original air circuit breakers, resulting in poor heat dissipation. Utility Model Content

[0005] The purpose of this utility model is to provide a heat dissipation structure for a vacuum circuit breaker and a vacuum circuit breaker in order to solve the technical problem of poor heat dissipation effect of the outer casing of existing vacuum circuit breakers.

[0006] In a first aspect, the present invention provides a heat dissipation structure for a vacuum circuit breaker, the vacuum circuit breaker including a vacuum bulb assembly, and the heat dissipation structure including: a housing disposed outside the vacuum bulb assembly;

[0007] Along the contact movement direction of the vacuum bubble assembly, the outer shell has two end faces corresponding to the opposite ends of the vacuum bubble assembly;

[0008] Both end faces are provided with heat dissipation areas, and each heat dissipation area is provided with at least one heat dissipation port.

[0009] In an optional embodiment, a gas guiding structure is further included, which is disposed at at least one of the opposite ends of the vacuum bubble assembly and communicates with the heat dissipation port on the corresponding end face.

[0010] In an optional embodiment, the air guiding structure includes a primary cavity disposed within the housing and located at the end of the vacuum bubble assembly, and the primary cavity is in communication with the heat dissipation port.

[0011] In an optional embodiment, the air guiding structure further includes a secondary cavity disposed within the outer shell and located between the primary cavity and the heat dissipation port, wherein the primary cavity and the secondary cavity are connected by at least one channel, and the secondary cavity is connected to the heat dissipation port.

[0012] In an optional embodiment, along the air guiding direction of the air guiding structure, the cross-sectional area of ​​the channel is smaller than the cross-sectional area of ​​the primary cavity and the cross-sectional area of ​​the secondary cavity, respectively.

[0013] In an optional embodiment, the cross-sectional area of ​​the secondary cavity is larger than the area of ​​the heat dissipation port along the air guiding direction of the air guiding structure.

[0014] In an optional embodiment, the air guiding structure further includes a three-stage cavity disposed outside the outer casing, the three-stage cavity being connected to the heat dissipation port.

[0015] In an optional embodiment, a side panel connected to the housing is also included;

[0016] Along the contact movement direction of the vacuum bubble assembly, the side plate has a protrusion that protrudes from the end face, and the protrusion and the end face form the three-stage cavity.

[0017] In an optional embodiment, the heat dissipation area has multiple heat dissipation vents;

[0018] or;

[0019] The heat dissipation area has an installation port, on which a heat dissipation plate is installed, and the heat dissipation plate has multiple heat dissipation ports.

[0020] Secondly, this utility model provides a vacuum circuit breaker, including the heat dissipation structure of the vacuum circuit breaker described in any of the foregoing embodiments.

[0021] Compared with the prior art, the heat dissipation structure of the vacuum circuit breaker provided by this utility model and the technical advantages of the vacuum circuit breaker are as follows:

[0022] The heat dissipation structure for a vacuum circuit breaker provided by this utility model includes a vacuum bulb assembly. The heat dissipation structure comprises: a shell disposed outside the vacuum bulb assembly; two end faces corresponding to opposite ends of the vacuum bulb assembly along the contact movement direction of the vacuum bulb assembly; and heat dissipation areas provided on both end faces, with at least one heat dissipation port within each heat dissipation area. Because heat dissipation ports are provided at opposite ends of the shell, heat generated inside the shell can be discharged through these ports, effectively improving heat dissipation and reducing product temperature rise.

[0023] The vacuum circuit breaker provided by this utility model includes the heat dissipation structure of the aforementioned vacuum circuit breaker. Therefore, the technical advantages and effects achieved by it include the technical advantages and effects achieved by the heat dissipation structure of the aforementioned vacuum circuit breaker, which will not be described in detail here.

[0024] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] 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.

[0026] Figure 1 A schematic diagram of the airflow of a vacuum circuit breaker provided in an embodiment of this utility model;

[0027] Figure 2 A top view of the vacuum circuit breaker provided in this embodiment of the utility model;

[0028] Figure 3 A bottom schematic diagram of the vacuum circuit breaker provided in this embodiment of the utility model;

[0029] Figure 4 A cross-sectional view of the gas-conducting structure of a vacuum circuit breaker provided in an embodiment of this utility model.

[0030] Icons: 1-Vacuum bubble assembly; 2-Housing shell; 3-Heat dissipation vent; 4-Primary cavity; 5-Secondary cavity; 6-Channel; 7-Tertiary cavity; 8-Side plate; 9-Mounting port; 10-Heat dissipation plate; 11-Vacuum bubble; 12-Moving contact; 13-Stationary contact. Detailed Implementation

[0031] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] 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.

[0033] 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.

[0034] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] The present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0036] The specific structure is as follows: Figures 1 to 4 As shown.

[0037] This embodiment provides a heat dissipation structure for a vacuum circuit breaker. The vacuum circuit breaker includes a vacuum bulb assembly 1, and the heat dissipation structure includes: a housing 2 disposed outside the vacuum bulb assembly 1; along the contact movement direction of the vacuum bulb assembly 1, the housing 2 has two end faces corresponding to the opposite ends of the vacuum bulb assembly 1; each of the two end faces is provided with a heat dissipation area, and at least one heat dissipation port 3 is provided in the heat dissipation area. Since heat dissipation ports 3 are provided at both opposite ends of the housing 2, the heat generated inside the housing 2 can be discharged through the heat dissipation ports 3 at both ends, effectively improving the heat dissipation effect and thereby reducing the product temperature rise.

[0038] In this embodiment, the vacuum bubble assembly 1 includes a vacuum bubble 11, a moving contact 12 with one end disposed inside the vacuum bubble 11, and a stationary contact 13 with one end disposed inside the vacuum bubble 11.

[0039] In this embodiment, multiple vacuum bubble components 1 can be provided as needed. One end face of the outer shell 2 has multiple heat dissipation areas corresponding to the vacuum bubble components 1, and / or the other end face of the outer shell 2 has multiple heat dissipation areas corresponding to the vacuum bubble components 1. Each heat dissipation area can have one or more heat dissipation vents 3, effectively ensuring heat dissipation.

[0040] In the optional technical solution of this embodiment, an air guiding structure is further included, which is disposed at at least one of the opposite ends of the vacuum bulb assembly 1 and communicates with the heat dissipation port 3 on the corresponding end face. The air guiding structure guides the airflow to be discharged, effectively improving the heat dissipation effect. The air guiding structure can be disposed at either end of the vacuum bulb assembly 1, or at both ends, depending on the requirements.

[0041] In the optional technical solution of this embodiment, the air guiding structure includes a primary cavity 4 disposed inside the outer shell 2 and located at the end of the vacuum bubble assembly 1, and the primary cavity 4 is connected to the heat dissipation port 3.

[0042] In this embodiment, the end of the vacuum bubble assembly 1 is located inside the primary cavity 4, which helps to diffuse heat. After entering the primary cavity 4, the heat is discharged through the heat dissipation port 3, thereby improving the heat dissipation effect.

[0043] In the optional technical solution of this embodiment, the air guiding structure further includes a secondary cavity 5 disposed within the outer shell 2 and located between the primary cavity 4 and the heat dissipation port 3. The primary cavity 4 and the secondary cavity 5 are connected by at least one channel 6, and the secondary cavity 5 is connected to the heat dissipation port 3. The heat generated by the vacuum bubble assembly 1 enters the primary cavity 4 and then enters the secondary cavity 5 through the channel 6, and is then discharged from the secondary cavity 5 through the heat dissipation port 3, further improving the heat dissipation effect. At the same time, the secondary cavity 5 effectively ensures the creepage distance.

[0044] In the optional technical solution of this embodiment, along the air guiding direction of the air guiding structure, the cross-sectional area of ​​channel 6 is smaller than the cross-sectional area of ​​the primary cavity 4 and the cross-sectional area of ​​the secondary cavity 5, respectively. Because channel 6 is relatively narrow, it protects the outer shell 2 to a certain level of protection, and prevents the protection level of the outer shell 2 from being reduced due to the opening of the secondary cavity and the heat dissipation vent 3.

[0045] In the optional technical solution of this embodiment, the cross-sectional area of ​​the secondary cavity 5 is larger than the area of ​​the heat dissipation port 3 along the air guiding direction of the air guiding structure. This improves the heat dissipation effect while avoiding a reduction in the protection level of the outer shell 2.

[0046] In the optional technical solution of this embodiment, the air guiding structure also includes a three-stage cavity 7 disposed outside the outer shell 2, and the three-stage cavity 7 is connected to the heat dissipation port 3.

[0047] In this embodiment, the heat generated inside the outer shell 2 is discharged to the outside through the primary cavity 4, the secondary cavity 5 and the tertiary cavity 7, effectively preventing the product temperature from rising. At the same time, the creepage on the live conductor needs to pass through the channel 6, the secondary cavity 5, the heat dissipation vent 3 and the tertiary cavity 7 to reach the outside, effectively ensuring the creepage distance.

[0048] It should be noted that if the product voltage is low enough, the secondary cavity 5 can be omitted, leaving only the primary cavity 4 and the tertiary cavity 7.

[0049] In the optional technical solution of this embodiment, a side plate 8 connected to the outer casing 2 is also included. Along the contact movement direction of the vacuum bulb assembly 1, the side plate 8 has a protrusion protruding from the end face, and a three-stage cavity 7 is formed between the protrusion and the end face. Since the vacuum circuit breaker is installed at the installation location via the side plate 8, the side plate 8 can support the entire outer casing 2, preventing the outer casing 2 from contacting the installation location, thereby forming the three-stage cavity 7. The structure is simple and the three-stage cavity 7 is easy to form, but it is not limited to this. A cavity can also be set separately to form the three-stage cavity 7, as long as the requirements are met.

[0050] In this embodiment, one or more side plates 8 may be provided on the periphery of the outer shell 2. Preferably, a pair of side plates 8 are provided and located on opposite sides of the outer shell 2 to ensure installation stability.

[0051] In the optional technical solution of this embodiment, the heat dissipation area is provided with multiple heat dissipation ports 3; or; the heat dissipation area is provided with an installation port 9, a heat dissipation plate 10 is installed on the installation port 9, and multiple heat dissipation ports 3 are provided on the heat dissipation plate 10.

[0052] In this embodiment, one or more heat dissipation ports 3 can be directly opened on the heat dissipation area on one end face of the outer shell 2, or an installation port 9 can be opened. A heat dissipation plate 10 is installed on the installation port 9, and one or more heat dissipation ports 3 are opened on the heat dissipation plate 10. The other end face of the outer shell 2 can be set in the same way, which will not be described in detail here.

[0053] This embodiment provides a vacuum circuit breaker, including the heat dissipation structure of the aforementioned vacuum circuit breaker. Therefore, the technical advantages and effects achieved by this vacuum circuit breaker include the technical advantages and effects achieved by the heat dissipation structure of the aforementioned vacuum circuit breaker, which will not be elaborated here.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat dissipation structure for a vacuum circuit breaker, the vacuum circuit breaker comprising a vacuum bulb assembly (1), characterized in that, The heat dissipation structure includes: a shell (2) disposed outside the vacuum bubble assembly (1); Along the contact movement direction of the vacuum bubble assembly (1), the outer shell (2) has two end faces corresponding to the opposite ends of the vacuum bubble assembly (1); Both end faces are provided with heat dissipation areas, and each heat dissipation area is provided with at least one heat dissipation port (3).

2. The heat dissipation structure of the vacuum circuit breaker according to claim 1, characterized in that, It also includes an air guiding structure disposed at at least one of the opposite ends of the vacuum bubble assembly (1) and connected to the heat dissipation port (3) on the corresponding end face.

3. The heat dissipation structure of the vacuum circuit breaker according to claim 2, characterized in that, The air guiding structure includes a primary cavity (4) disposed inside the outer shell (2) and located at the end of the vacuum bubble assembly (1), and the primary cavity (4) is connected to the heat dissipation port (3).

4. The heat dissipation structure of the vacuum circuit breaker according to claim 3, characterized in that, The air guiding structure also includes a secondary cavity (5) disposed inside the outer shell (2) and located between the primary cavity (4) and the heat dissipation port (3). The primary cavity (4) and the secondary cavity (5) are connected by at least one channel (6), and the secondary cavity (5) is connected to the heat dissipation port (3).

5. The heat dissipation structure of the vacuum circuit breaker according to claim 4, characterized in that, Along the air guiding direction of the air guiding structure, the cross-sectional area of ​​the channel (6) is smaller than the cross-sectional area of ​​the primary cavity (4) and the cross-sectional area of ​​the secondary cavity (5).

6. The heat dissipation structure of the vacuum circuit breaker according to claim 4, characterized in that, Along the air guiding direction of the air guiding structure, the cross-sectional area of ​​the secondary cavity (5) is larger than the area of ​​the heat dissipation port (3).

7. The heat dissipation structure of the vacuum circuit breaker according to any one of claims 3-6, characterized in that, The air guiding structure also includes a three-stage cavity (7) disposed outside the outer shell (2), and the three-stage cavity (7) is connected to the heat dissipation port (3).

8. The heat dissipation structure of the vacuum circuit breaker according to claim 7, characterized in that, It also includes a side plate (8) connected to the outer casing (2); Along the contact movement direction of the vacuum bubble assembly (1), the side plate (8) has a protrusion protruding from the end face, and the protrusion and the end face form the third-level cavity (7).

9. The heat dissipation structure of the vacuum circuit breaker according to claim 1, characterized in that, The heat dissipation area is provided with multiple heat dissipation ports (3); or; The heat dissipation area is provided with an installation port (9), and a heat dissipation plate (10) is installed on the installation port (9). The heat dissipation plate (10) is provided with a plurality of heat dissipation ports (3).

10. A vacuum circuit breaker, characterized in that, The heat dissipation structure includes the vacuum circuit breaker as described in any one of claims 1-9.

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