Wide voltage ac contactor

Abstract

The utility model relates to a kind of wide voltage AC contactors, the utility model is arranged obliquely in arc extinguishing grid piece in arc extinguishing cover, compared with traditional vertical or horizontal arrangement, it can increase the contact area and contact opportunity of arc and grid piece, shell is provided with opening at the arc extinguishing grid piece corresponding arc extinguishing cover, it is helpful to the rapid heat dissipation of arc, arc can produce a lot of heat in combustion process, opening can make heat faster dissipate to surrounding environment, avoid heat accumulation in arc extinguishing chamber, to reduce the temperature of arc extinguishing chamber, improve arc extinguishing capacity, simultaneously, opening can also promote the circulation of gas in arc extinguishing chamber, accelerate arc extinguishing, wide voltage circuit board can carry out stable processing and conversion to different range of input voltage, ensure that AC contactor can still work normally under the condition of large voltage fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of contactor technology, and in particular to a wide voltage AC contactor. Background Technology

[0002] In the field of AC contactors, traditional products have significant shortcomings in arc extinguishing performance, electrical connection stability, and voltage adaptability. Regarding arc extinguishing, the arc-extinguishing grids are mostly arranged vertically or horizontally, limiting the contact area and opportunity between the arc and the grids. This results in slow arc extinguishing and weak arc extinguishing capability. Heat accumulation in the arc-extinguishing chamber during arc combustion shortens its lifespan and affects the overall performance and reliability of the contactor. In terms of electrical connection, the static contact assembly uses a split structure, assembled from multiple parts, leading to high contact resistance, high energy consumption, and severe heat generation, reducing electrical connection efficiency and stability and increasing the risk of operational failures. Regarding voltage adaptability, traditional circuit boards have limited capacity to handle input voltage fluctuations and cannot adapt to large voltage fluctuations. When the voltage is unstable, the contactor may not function properly, affecting the operation of related equipment. Furthermore, the existing housing structure design is unreasonable, and assembly and disassembly are complex, increasing production, repair, and maintenance costs and time. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a wide voltage AC contactor with good arc extinguishing performance, stable electrical connection and wide voltage adaptability.

[0004] To achieve the above objectives, this utility model employs a wide-voltage AC contactor, comprising a housing, within which a double-break contact assembly is disposed. The double-break contact assembly includes a moving contact assembly and stationary contact assemblies located on both sides of the moving contact assembly. An arc-extinguishing chamber is disposed between the moving contact assembly and the stationary contact assemblies on both sides. An arc-extinguishing shroud is disposed within the arc-extinguishing chamber, and the arc-extinguishing shroud includes a plurality of obliquely arranged arc-extinguishing grids. The housing has an opening corresponding to the arc-extinguishing grids of the arc-extinguishing shroud. A wide-voltage circuit board is also disposed within the housing, and the wide-voltage circuit board is electrically connected to the double-break contact assembly.

[0005] Compared with existing technologies, the advantages of the above structure are as follows: by arranging the arc-extinguishing grid plates inside the arc-extinguishing chamber obliquely, compared with the traditional vertical or horizontal arrangement, the contact area and contact opportunities between the arc and the grid plates can be increased. The housing has openings at the arc-extinguishing grid plates corresponding to the arc-extinguishing chamber, which helps the arc to dissipate heat quickly. The arc generates a lot of heat during combustion, and the openings can dissipate the heat to the surrounding environment more quickly, avoiding the accumulation of heat in the arc-extinguishing chamber, thereby reducing the temperature of the arc-extinguishing chamber and improving the arc-extinguishing ability. At the same time, the openings can also promote the circulation of gas in the arc-extinguishing chamber and accelerate the extinction of the arc. The wide voltage circuit board can stably process and convert input voltages of different ranges, ensuring that the AC contactor can still work normally under large voltage fluctuations.

[0006] This utility model further specifies that the stationary contact assembly includes a stationary contact connecting plate integrally formed and disposed at the lower end of the arc-extinguishing shroud. The stationary contact connecting plate includes a connecting plate and a magnetic conductive plate integrally formed by casting and covering the connecting plate. The connecting plate is provided with stationary contacts. Through integral molding, good electrical conductivity is achieved between the connecting plate and the magnetic conductive plate, reducing contact resistance, reducing energy loss and heat generation, and improving the efficiency and stability of the electrical connection. The integral casting process can ensure the material uniformity and conductivity of the stationary contact connecting plate, and the integrally formed stationary contact connecting plate reduces the assembly process of separate components.

[0007] This utility model is further configured with a housing comprising a base, a base seat covering the base, an upper seat covering the base, and an arc-extinguishing chamber cover covering the upper seat. The arc-extinguishing chamber is located inside the upper seat. The side walls of the arc-extinguishing chamber are symmetrically provided with slots for mounting a plurality of obliquely arranged arc-extinguishing grid plates. The wide-voltage circuit board is disposed in the area between the base and the base seat and is fixed by a bracket installed between the base and the base seat. The wide-voltage circuit board is mounted on one side of the bracket. The housing is composed of the base, base seat, upper seat, and arc-extinguishing chamber cover, which are sequentially assembled. This modular design makes the assembly and disassembly of the AC contactor more convenient. The symmetrical slots on the side walls of the arc-extinguishing chamber for mounting a plurality of obliquely arranged arc-extinguishing grid plates allow the arc-extinguishing grid plates to be stably installed inside the arc-extinguishing chamber. The wide-voltage circuit board is fixed by a bracket installed between the base and the base seat. This fixing method is simple and reliable, ensuring the stability of the wide-voltage circuit board during operation. Attached Figure Description

[0008] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0009] Figure 2 This is a front view of the structure of the missing upper seat and the arc extinguishing chamber cover of this utility model embodiment.

[0010] Figure 3 This is a three-dimensional structural view of the missing upper seat and the arc-extinguishing chamber cover of an embodiment of this utility model.

[0011] Figure 4 This is a schematic diagram of the static contact assembly structure according to an embodiment of the present utility model.

[0012] Figure 5 This is an exploded view of the arc-extinguishing grid plate installation inside the arc-extinguishing shroud according to an embodiment of this utility model.

[0013] Figure 6 This is an exploded view of the installation of the wide voltage circuit board inside the base and the base of this utility model embodiment. Detailed Implementation

[0014] like Figures 1-6 As shown, an embodiment of this utility model provides a wide-voltage AC contactor, including a housing 1. The housing 1 serves as the support and protection structure for the entire device, providing a stable installation environment for the internal components. Inside the housing 1, a double-break contact assembly is provided. The double-break contact assembly is a key component for the AC contactor to achieve circuit switching control. It includes a moving contact assembly 2 and stationary contact assemblies 3 located on both sides of the moving contact assembly 2. An arc-extinguishing chamber 4 is provided between the moving contact assembly 2 and the stationary contact assemblies 3 on both sides. An arc-extinguishing cover 41 is provided inside the arc-extinguishing chamber 4. The arc-extinguishing cover 41 has four obliquely arranged arc-extinguishing grid plates 411 inside. At the same time, the housing 1 has an opening 15 at the corresponding arc-extinguishing grid plates 411 of the arc-extinguishing cover 41.

[0015] The stationary contact assembly 3 includes a stationary contact connecting plate that is integrally formed and disposed at the lower end of the arc extinguishing cover 41. The stationary contact connecting plate is integrally formed and is specifically composed of a connecting plate 31 and a magnetic conductive plate 32 that is integrally formed by casting and covers the connecting plate 31. The connecting plate 31 is provided with a stationary contact 311.

[0016] The housing 1 adopts a modular design, consisting of a base 11, a base 12 covering the base 11, an upper seat 13 covering the base 12, and an arc-extinguishing chamber cover 14 covering the upper seat 13, which are sequentially assembled. The arc-extinguishing chamber 4 is located inside the upper seat 13, providing a stable installation position for the arc-extinguishing chamber 4. The side wall of the arc-extinguishing cover 41 is symmetrically provided with slots 412 for mounting four obliquely arranged arc-extinguishing grid plates 411. Through these slots 412, the arc-extinguishing grid plates 411 can be stably installed inside the arc-extinguishing cover 41. It also includes a wide voltage circuit board 5, which is located in the area between the base 12 and the base 11 and is fixed by a bracket 6 installed between the base 12 and the base 11. The wide voltage circuit board 5 is installed on one side of the bracket 6 and is electrically connected to the double-break contact assembly. It can stabilize and convert input voltages of different ranges, ensuring that the AC contactor can still work normally under large voltage fluctuations, thus improving the voltage adaptability of the AC contactor and expanding its application range.

[0017] It should be noted that only one set of components is marked in detail in the diagram, but the entire structure contains three identical sets of components.

[0018] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A wide-voltage AC contactor, comprising a housing, wherein a double-break contact assembly is disposed within the housing, the double-break contact assembly comprising a moving contact assembly and stationary contact assemblies located on both sides of the moving contact assembly, an arc-extinguishing chamber is disposed between the moving contact assembly and the stationary contact assemblies on both sides, and an arc-extinguishing shroud is disposed within the arc-extinguishing chamber, characterized in that: The arc-extinguishing shroud includes several obliquely arranged arc-extinguishing grids. The housing has an opening at the arc-extinguishing grid corresponding to the arc-extinguishing shroud. The housing also contains a wide voltage circuit board, which is electrically connected to the double-break contact assembly.

2. The wide-voltage AC contactor according to claim 1, characterized in that: The stationary contact assembly includes a stationary contact connecting plate integrally formed and disposed at the lower end of the arc extinguishing shroud. The stationary contact connecting plate includes a connecting plate and a magnetic conductive plate integrally formed by casting and covering the connecting plate. The connecting plate is provided with stationary contacts.

3. The wide-voltage AC contactor according to claim 1 or 2, characterized in that: The housing includes a base, a base seat covering the base, an upper seat covering the base, and an arc-extinguishing chamber cover covering the upper seat. The arc-extinguishing chamber is located inside the upper seat. The side wall of the arc-extinguishing cover is symmetrically provided with slots for mounting a number of obliquely arranged arc-extinguishing grid plates. The wide voltage circuit board is disposed in the area between the base and the base seat and is fixed by a bracket installed between the base and the base seat. The wide voltage circuit board is mounted on one side of the bracket.

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