An alternating current contactor

Abstract

The application relates to the technical field of contactors, in particular to an alternating current contactor. The alternating current contactor comprises a base, the base is internally provided with a cavity, and a contact is arranged in the cavity; an arc extinguishing assembly is arranged in the base, the arc extinguishing assembly comprises an arc baffle and an arc extinguishing piece, the arc extinguishing piece is fixedly arranged in the cavity and located at one side of the contact, the arc baffle is fixedly arranged at an opening of the cavity of the base, the arc baffle is located at a side of the arc extinguishing piece away from the contact, the arc extinguishing piece is provided with a first arc discharging port, the arc baffle is provided with a second arc discharging port, and an electric arc generated by the contact is adapted to be discharged out of the base through the first arc discharging port and the second arc discharging port in sequence. The arc extinguishing piece is arranged at one side of the contact, the arc baffle is arranged at one side of the arc extinguishing piece, the arc extinguishing piece guides the electric arc generated by the contact to spatter out through the first arc discharging port, and the electric arc is discharged out of the base from the second arc discharging port under the guidance of the arc extinguishing piece, so that the problem that the electric arc influences the service life of the contact is solved, and the service life of the contact is improved.

Description

Technical Field

[0001] This invention relates to the field of contactor technology, and more specifically to an AC contactor. Background Technology

[0002] A contactor is an electrical device that uses current flowing through a coil to generate a magnetic field, causing contacts to close and enabling efficient power transmission. A typical contactor consists of an electromagnetic system (moving iron core, stationary iron core, and electromagnetic coil), a contact system, and an arc-extinguishing device. When the contactor's electromagnetic coil is energized, it generates a strong magnetic field, causing the stationary iron core to attract the moving iron core, which in turn moves the contacts, closing them. When the coil is de-energized, the electromagnetic attraction disappears, the moving iron core is released by the release spring, the contacts return to their original position, and the contacts open. However, an electric arc is generated during the opening and closing process. The high temperature generated by the arc can blacken, char, or burn the contacts, producing metal particles that directly affect the contact's lifespan and thus the contactor's stability. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the contacts generate an electric arc during the switching process in the prior art. The high temperature generated by the electric arc can cause the contacts to burn black, char, and become rough, producing metal particles, which directly affects the service life of the contacts. Thus, an AC contactor is provided.

[0004] To address the above problems, the present invention provides an AC contactor, comprising:

[0005] A base having a cavity inside, and a contact being disposed within the cavity;

[0006] An arc-extinguishing assembly is disposed within the base. The arc-extinguishing assembly includes an arc-blocking component and an arc-extinguishing component. The arc-extinguishing component is fixedly disposed within a cavity and located on one side of the contact. The arc-blocking component is fixedly disposed at the opening of the cavity of the base and is located on the side of the arc-extinguishing component away from the contact. The arc-extinguishing component has a first row of arc openings, and the arc-blocking component has a second row of arc openings. The arc generated by the contact is adapted to be discharged from the base sequentially through the first row of arc openings and the second row of arc openings.

[0007] Furthermore, the second row of arc-shaped openings is disposed on the arc-stopping component.

[0008] Furthermore, the second row of arc-shaped openings is located at the bottom of the arc-blocking component.

[0009] Furthermore, the arc-extinguishing component has a bent portion, and a rib is provided in the cavity of the base, with the bent portion engaged on the rib.

[0010] Furthermore, it also includes:

[0011] The housing is connected to the base via a limiting structure, the limiting structure including a limiting protrusion and a limiting recess, and the limiting protrusion and the limiting recess are respectively provided on the housing and the base.

[0012] Furthermore, the limiting recess has a mountain-shaped structure.

[0013] Furthermore, a groove is provided at the connection between the bent portion and the arc-extinguishing component.

[0014] Furthermore, the arc-extinguishing component is provided with a semi-circular hole, which is respectively located on both sides of the groove.

[0015] Furthermore, it also includes:

[0016] The base and the housing are respectively provided with hooks and buckles, the hooks and buckles cooperate, and the base is adapted to be connected to the housing through the hooks and buckles.

[0017] Furthermore, the base is also provided with heat dissipation ribs, and the arc extinguishing component is connected to the base through the heat dissipation ribs.

[0018] The present invention has the following advantages:

[0019] 1. This invention provides an AC contactor, comprising: a base and an arc-extinguishing assembly, wherein the base has a cavity and a contact is disposed within the cavity; the arc-extinguishing assembly is disposed within the base, the arc-extinguishing assembly comprising an arc-blocking member and an arc-extinguishing member, the arc-extinguishing member being fixedly disposed within the cavity and located on one side of the contact, the arc-blocking member being fixedly disposed at the opening of the cavity of the base, the arc-blocking member being located on the side of the arc-extinguishing member away from the contact, the arc-extinguishing member having a first row of arc openings, the arc-blocking member having a second row of arc openings, and the arc generated by the contact being adapted to be discharged from the base sequentially through the first row of arc openings and the second row of arc openings.

[0020] In this AC contactor structure, the arc-extinguishing element is located on one side of the contact, and the arc-blocking element is located on the other side of the arc-extinguishing element. The arc-extinguishing element guides the arc generated by the contact to be ejected through the first row of arc outlets. Under the guidance of the arc-extinguishing element, the arc is discharged from the base through the second row of arc outlets, thus solving the problem of the arc affecting the service life of the contact and further improving the service life of the contact and ensuring the stability of the contactor.

[0021] 2. In this AC contactor structure, the second row of arc ports is located on the arc stop, so that the arc is guided by the arc extinguishing device and discharged from the second row of arc ports on the arc stop.

[0022] 3. In this AC contactor structure, the second row of arc ports is located at the bottom of the arc stop, so that the arc is guided by the arc extinguishing element and discharged from the second row of arc ports on the arc stop.

[0023] 4. In this AC contactor structure, the arc-extinguishing component has a bent portion, and the cavity is provided with ribs suitable for locking the bent portion, thereby limiting the arc-extinguishing component. Furthermore, the bent portion has an arc-inducing function, which can guide the electric arc to the second arc outlet, improving the arc-extinguishing efficiency.

[0024] 5. The AC contactor with this structure has a mountain-shaped limiting recess, which increases the creepage distance of the electric arc, better consumes the energy of the electric arc, and prevents short circuits between adjacent phases.

[0025] 6. In this AC contactor structure, a groove is provided at the connection between the bending part and the arc-extinguishing component, so that the bending part can be bent easily.

[0026] 7. In this AC contactor structure, semi-circular holes are provided on both sides of the groove, so that the bending angle of the bending part can be adjusted through the semi-circular holes.

[0027] 8. In this AC contactor structure, the arc-extinguishing element is connected to the base via heat dissipation fins, thus preventing the arc-extinguishing element from directly contacting the inner wall of the base and further increasing the heat dissipation capacity of the arc-extinguishing element. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional view of the AC contactor in Embodiment 1 of the present invention;

[0030] Figure 2 for Figure 1 Enlarged view of section A;

[0031] Figure 3 This is a schematic diagram of the arc-blocking component in Embodiment 1 of the present invention;

[0032] Figure 4 This is a schematic diagram of the arc-blocking component in Embodiment 2 of the present invention.

[0033] Figure 5 This is a schematic diagram of the arc-extinguishing component in Embodiment 1 of the present invention;

[0034] Figure 6 This is a side view of the base in Embodiment 1 of the present invention;

[0035] Figure 7This is a cross-sectional view of the AC contactor in Embodiment 1 of the present invention;

[0036] Figure 8 This is a schematic diagram of the base structure in Embodiment 1 of the present invention;

[0037] Figure 9 This is a schematic diagram of the shell structure in Embodiment 1 of the present invention;

[0038] Figure 10 This is a cross-sectional view of the base in Embodiment 1 of the present invention;

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Base; 2. Contact; 3. Arc extinguishing component; 4. Arc stop component; 5. First row of arc openings; 6. Second row of arc openings; 7. Bending part; 8. Rib; 9. Housing; 10. Limiting protrusion; 11. Limiting recess; 12. Groove; 13. Semicircular hole; 14. Base; 15. Hook; 16. Buckle; 17. Heat dissipation rib. Detailed Implementation

[0041] The technical solution of the present invention 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 the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention according to the specific circumstances.

[0044] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example 1

[0046] like Figures 1 to 3 as well as Figures 5 to 10 As shown, this invention discloses an AC contactor, comprising: a base 1 and an arc-extinguishing assembly. The base 1 has a cavity, and a contact 2 is disposed within the cavity. The arc-extinguishing assembly is disposed within the base 1 and includes an arc-blocking member 4 and an arc-extinguishing member 3. The arc-extinguishing member 3 is fixedly disposed within the cavity and located on one side of the contact 2. The arc-blocking member 4 is fixedly disposed at the opening of the cavity of the base 1, located on the side of the arc-extinguishing member 3 away from the contact 2. The arc-extinguishing member 3 has a first row of arc openings 5, and the arc-blocking member 4 has a second row of arc openings 6. The arc generated by the contact 2 is adapted to exit the base 1 sequentially through the first row of arc openings 5 ​​and the second row of arc openings 6. Figure 1 and Figure 2 In this configuration, the arc-stopping element 4 is positioned to the left of the arc-extinguishing element 3, which in turn is positioned to the left of the contact 2. The arc-stopping element 4 is fixedly positioned at the opening of the cavity in the base 1 and can seal the cavity. Both the arc-extinguishing element 3 and the arc-stopping element 4 are made of conductive material. When the contact 2 is opened, the arc generated by the contact 2 is guided by the arc-extinguishing element 3 and discharged from the first row of arc openings 5 ​​into the cavity between the arc-extinguishing element 3 and the arc-stopping element 4. Subsequently, the arc is guided by the arc-stopping element 4 and discharged from the second row of arc openings 6 to the outside of the base 1.

[0047] Furthermore, such as Figure 3 As shown, the second row of arc openings 6 is set on the arc stopper 4. The upper and lower ends of the arc stopper 4 are fixedly connected to the base 1, so that the arc can only be discharged from the base 1 through the second row of arc openings 6.

[0048] Furthermore, such as Figure 2 and Figure 4 As shown, the arc-extinguishing component 3 has a bending portion 7, and a rib 8 is provided inside the cavity of the base 1. The bending portion 7 is engaged with the rib 8. The arc-extinguishing component 3 is thus positioned inside the cavity of the base 1 by being engaged with the rib 8 through the bending portion 7. The bending portion 7 also has a guiding function. The bending portion 7 is correspondingly arranged with the second row of arc openings 6. The arc-extinguishing component 3 discharges the arc generated by the contact 2 from the first row of arc openings 5 ​​into the cavity between the arc-extinguishing component 3 and the arc-blocking component 4. Then, the bending portion 7 guides the arc in the cavity between the arc-extinguishing component 3 and the arc-blocking component 4 and guides the arc to the second row of arc openings 6, so that the arc is discharged from the second row of arc openings 6.

[0049] Furthermore, such as Figure 4 As shown, a groove 12 is provided at the connection between the bending part 7 and the arc-extinguishing component 3. The groove 12 facilitates the bending of the bending part 7.

[0050] Furthermore, such as Figure 4 As shown, the arc-extinguishing component 3 is provided with semi-circular holes 13, which are respectively located on both sides of the groove 12. The semi-circular holes 13 on both sides of the groove 12 facilitate the control of the bending dimension of the bending part 7.

[0051] Specifically, the corners of the arc-extinguishing component 3 are all rounded, which can prevent the electric arc from being attracted to the corners of the arc-extinguishing component 3.

[0052] Furthermore, such as Figure 6 As shown, the arc stop 4 is fixedly mounted on the base 1 by a snap fastener 16.

[0053] Furthermore, such as Figure 7 As shown, it also includes a housing 9. The housing 9 is connected to the base 1 via a limiting structure, which includes a limiting protrusion 10 and a limiting recess 11. The housing 9 and the base 1 are respectively provided with limiting protrusions 10 and limiting recesses 11. The housing 9 and the base 1 are engaged and fixed by the limiting protrusions 10 and limiting recesses 11. Preferably, the housing 9 is provided with a limiting protrusion 10, and the base 1 is provided with a limiting recess 11. In other optional embodiments, the housing 9 is provided with a limiting recess 11, and the base 1 is provided with a limiting protrusion 10.

[0054] Specifically, the limiting recess 11 has a mountain-shaped structure. The mountain-shaped structure can increase the creepage distance and electrical clearance between two adjacent phases, and the limiting recess 11 can separate two adjacent phases, which can effectively prevent the problem of arcing short circuit between two adjacent phases when the contact 2 is opened, thus strengthening the insulation performance.

[0055] Furthermore, such as Figure 8 and Figure 9 As shown, it also includes: a base 14. The base 14 and the housing 9 are respectively provided with hooks 15 and buckles 16, which cooperate with each other, and the base 14 is adapted to be connected to the housing 9 through the hooks 15 and buckles 16.

[0056] Preferred, in Figure 8 In the original design, the base 14 has three hooks 15, two hooks 15 on the left side and one hook 15 on the right side. In other alternative embodiments, the base 14 may have two or four hooks 15, or other numbers of hooks 15.

[0057] Preferred, in Figure 9 In the case of housing 9, three latches 16 are provided, two latches 16 are provided on the left side of housing 9, and one latch 16 is provided on the right side of housing 9. In other optional embodiments, two or four latches 16 or other numbers may be provided on each latch 16, the number of which is consistent with the number of hooks 15, and the hooks 15 and latches 16 are provided in a one-to-one correspondence.

[0058] Furthermore, such as Figure 10 As shown, the base 1 is also provided with heat dissipation ribs 17, and the arc-extinguishing element 3 is connected to the base 1 through the heat dissipation ribs 17. Multiple heat dissipation ribs 17 are arranged on the inner wall of the base 1 within the cavity of the base 1. The multiple heat dissipation ribs 17 are respectively connected to the front and rear end faces of the arc-extinguishing element 3. The heat dissipation ribs 17 can prevent the arc-extinguishing element 3 from directly contacting the inner wall of the base 1, thereby increasing heat dissipation capacity. The right end of the heat dissipation rib 17 has a rounded corner for easy installation of the arc-extinguishing element 3. Preferably, in this embodiment, four heat dissipation ribs 17 are provided on the inner wall of the base 1. In other optional embodiments, three or five, or other numbers of heat dissipation ribs 17, can be provided on the inner wall of the base 1.

[0059] Example 2

[0060] This embodiment discloses an AC contactor, which differs from the one provided in Embodiment 1 in that:

[0061] like Figure 4 As shown, the second row of arc openings 6 is located at the bottom of the arc stopper 4. When the contact 2 is opened, the arc generated by the contact 2 is guided by the arc extinguishing element 3 and discharged from the first row of arc openings 5 ​​into the cavity between the arc extinguishing element 3 and the arc stopper 4, and then discharged from the second row of arc openings 6 at the bottom of the arc stopper 4 to the outside of the base 1.

[0062] 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 scope of protection of this invention.

Claims

1. An AC contactor, characterized in that, include: A base (1) has a cavity inside, and a contact (2) is provided inside the cavity; An arc-extinguishing assembly is disposed within the base (1). The arc-extinguishing assembly includes an arc-blocking member (4) and an arc-extinguishing member (3). The arc-extinguishing member (3) is fixedly disposed within the cavity and located on one side of the contact (2). The arc-blocking member (4) is fixedly disposed at the opening of the cavity of the base (1). The arc-blocking member (4) is located on the side of the arc-extinguishing member (3) away from the contact (2). The arc-extinguishing member (3) is provided with a first row of arc openings (5), and the arc-blocking member (4) has a second row of arc openings (6). The arc generated by the contact (2) is suitable to be discharged from the base (1) through the first row of arc openings (5) and the second row of arc openings (6) in sequence. The arc extinguishing element (3) and the arc blocking element (4) are made of conductive materials. When the contact (2) is opened, the arc generated by the contact (2) is guided by the arc extinguishing element (3) and discharged from the first row of arc openings (5) into the cavity between the arc extinguishing element (3) and the arc blocking element (4). Then the arc is guided by the arc blocking element (4) and discharged from the second row of arc openings (6) to the outside of the base (1). The arc extinguishing component (3) has a bending part (7), which is correspondingly arranged with the second row of arc openings (6). The bending part (7) guides the electric arc to the second row of arc openings (6) so that the electric arc is discharged from the second row of arc openings (6).

2. The AC contactor according to claim 1, characterized in that: The cavity of the base (1) is provided with a rib (8), and the bending part (7) is engaged on the rib (8).

3. The AC contactor according to claim 2, characterized in that, Also includes: The housing (9) is connected to the base (1) through a limiting structure. The limiting structure includes a limiting protrusion (10) and a limiting recess (11). The limiting protrusion (10) and the limiting recess (11) are respectively provided on the housing (9) and the base (1).

4. The AC contactor according to claim 3, characterized in that: The limiting recess (11) has a mountain-shaped structure.

5. The AC contactor according to claim 2, characterized in that: A groove (12) is provided at the connection between the bent part (7) and the arc extinguishing component (3).

6. The AC contactor according to claim 5, characterized in that: The arc-extinguishing component (3) is provided with a semi-circular hole (13), which is respectively provided on both sides of the groove (12).

7. The AC contactor according to claim 3, characterized in that, Also includes: The base (14) and the housing (9) are respectively provided with hooks (15) and buckles (16), the hooks (15) and buckles (16) cooperate with each other, and the base (14) is adapted to be connected to the housing (9) through the hooks (15) and buckles (16).

8. The AC contactor according to claim 1, characterized in that: The base (1) is also provided with heat dissipation ribs (17), and the arc extinguishing component (3) is connected to the base (1) through the heat dissipation ribs (17).

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