Arc extinguishing structure, change-over switch and electric equipment

Abstract

The invention provides an arc extinguishing structure, a change-over switch and electric equipment, and relates to the technical field of low-voltage electric appliances. The arc extinguishing structure comprises a shell, a mounting seat and a duct; the mounting seat is rotatably arranged on the shell, and the mounting seat is used for mounting the moving contact; the duct is arranged on one side of the mounting seat, the duct is provided with an air outlet, the air outlet is used for facing the moving contact, and the duct is used for synchronously rotating along with the mounting seat, so that airflow flows to the moving contact through the air outlet. According to the utility model, the duct and the mounting seat rotate synchronously, the air flow is blown to the moving contact through the air outlet, and the blown air flow not only can cool the moving contact, but also can generate an arc blowing effect, so that the arc extinguishing performance is improved, the ablation phenomenon of the moving contact and the static contact is avoided, and the service life of the moving contact and the static contact is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical appliances, and in particular, to an arc extinguishing structure, a transfer switch, and an electrical equipment. Background Art

[0002] At present, in order to ensure electrical safety, a transfer switch is usually set in a circuit to cut off the circuit in time when a fault such as a short circuit occurs in the circuit, so as to effectively protect the circuit and electrical equipment.

[0003] However, during the closing or opening process of the transfer switch, an arc will be generated, which will ablate the moving contact and the static contact, affecting the service life of the product. Summary of the Invention

[0004] The present invention provides an arc extinguishing structure, a transfer switch, and an electrical equipment, which blow air to cool the moving contact, generate an arc blowing effect, avoid ablation between the moving contact and the static contact, and thus extend their service life.

[0005] Embodiments of the present invention may be implemented as follows:

[0006] In a first aspect, the present invention provides an arc extinguishing structure, including:

[0007] A housing;

[0008] A mounting seat rotatably arranged in the housing for mounting a moving contact;

[0009] A duct arranged on one side of the mounting seat, the duct being provided with an air outlet for facing the moving contact, and the duct being configured to rotate synchronously with the mounting seat so that air flow flows through the air outlet towards the moving contact.

[0010] In an alternative embodiment, the duct is further provided with an air inlet, and the contour area of the air inlet is larger than that of the air outlet.

[0011] In an alternative embodiment, the inner diameter of the duct gradually increases from the air outlet along the direction of the air inlet.

[0012] In an alternative embodiment, the duct is in a flared shape.

[0013] In an alternative embodiment, the arc extinguishing structure further includes a moving contact arranged on the mounting seat;

[0014] The moving contact includes a contact portion for contacting the static contact, the air outlet facing the contact portion; the duct is configured to jet air flow through the air outlet towards the contact portion when the moving contact moves away from the static contact to open the switch.

[0015] In an alternative embodiment, the moving contact includes two contact pieces, the contact portion is disposed at the end of the contact piece, and the two contact pieces are disposed opposite to each other so that the two contact portions are disposed opposite to each other; the air outlet faces the two contact portions.

[0016] In an alternative embodiment, the number of the contact portions and the ducts is two, the two ducts respectively face the two contact portions, and the two ducts are symmetrically arranged.

[0017] In an alternative embodiment, the arc extinguishing structure further includes a static contact, the static contact is disposed on the housing, and the duct is located on a side of the moving contact away from the static contact.

[0018] In a second aspect, the present invention provides a change-over switch, including the arc extinguishing structure according to any one of the foregoing embodiments.

[0019] In a third aspect, the present invention provides an electrical equipment, including the change-over switch according to the foregoing embodiment.

[0020] The beneficial effects of the arc extinguishing structure, the change-over switch and the electrical equipment provided by the embodiments of the present invention include: the duct rotates synchronously with the mounting base, and air flow is blown out from the air outlet to the moving contact, and the blown air flow can not only cool the moving contact, but also generate an arc blowing effect, so as to improve the arc extinguishing performance, thereby avoiding the ablation phenomenon between the moving contact and the static contact, and prolonging its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without creative efforts.

[0022] Figure 1 Schematic diagram of the first perspective structure of the arc extinguishing structure provided by the embodiment of the present invention;

[0023] Figure 2 Schematic diagram of the second perspective structure of the arc extinguishing structure provided by the embodiment of the present invention;

[0024] Figure 3 Schematic diagram of the first perspective structure of a partial structure of the arc extinguishing structure provided by the embodiment of the present invention;

[0025] Figure 4 Schematic diagram of the second perspective structure of a partial structure of the arc extinguishing structure provided by the embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the third perspective structure of a part of the arc extinguishing structure provided by an embodiment of the present invention.

[0027] Icon: 10 - arc extinguishing structure; 100 - housing; 200 - mounting base; 300 - duct; 310 - air outlet; 320 - air inlet; 400 - moving contact; 410 - contact piece; 411 - contact part; 500 - static contact. Detailed implementation manners

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0030] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0032] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0033] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0034] At present, in order to ensure electrical safety, a transfer switch is usually set in the circuit to cut off the circuit in time when a fault such as a short circuit occurs in the circuit, so as to effectively protect the circuit and electrical equipment. However, an arc will be generated during the closing or opening process of the transfer switch, and the moving contact 400 and the static contact 500 will be ablated, affecting the service life of the product.

[0035] Based on the above problems, please refer to Figures 1 to 5 , the present invention provides an arc extinguishing structure 10, which can be applied to a transfer switch, etc. The arc extinguishing structure 10 includes a housing 100, a mounting seat 200 and a duct 300.

[0036] Among them, the mounting seat 200 is rotatably arranged in the housing 100. The mounting seat 200 is used to mount the moving contact 400 to drive the moving contact 400 to rotate relative to the housing 100, so as to contact the static contact 500 to close the switch, or separate from the static contact 500 to open the switch.

[0037] The duct 300 is arranged on one side of the mounting seat 200. The duct 300 is provided with an air outlet 310. The air outlet 310 is used to face the moving contact 400, and the duct 300 is used to rotate synchronously with the mounting seat 200 to spray air flow to the moving contact 400 through the air outlet 310.

[0038] In this embodiment, during the process that the mounting seat 200 rotates to drive the moving contact 400 to close or open the switch, the duct 300 rotates synchronously with the mounting seat 200, and blows air flow to the moving contact 400 through the air outlet 310. The blown air flow can not only cool the moving contact 400, but also generate an arc blowing effect, so as to improve the arc extinguishing performance, thus avoiding the ablation phenomenon between the moving contact 400 and the static contact 500, and prolonging their service life.

[0039] It can be understood that the duct 300 can generate air flow through its own rotation. In other words, the kinetic energy of the rotation of the mounting seat 200 is converted into the kinetic energy of air, so that the air enters from one end of the duct 300 and blows out from the air outlet 310. Of course, in other embodiments, an air source can also be connected to the duct 300, and gas is input into the duct 300 through the air source to make the gas jet out from the air outlet 310, which can be set according to actual needs and will not be specifically limited here.

[0040] Specifically, the duct 300 is further provided with an air inlet 320. The air inlet 320 is located at one end of the duct 300 away from the air outlet 310, and the contour area of the air inlet 320 is larger than the contour area of the air outlet 310.

[0041] In this embodiment, during the process of the mounting base 200 driving the duct 300 to rotate, the kinetic energy of the mounting base 200 is converted into the kinetic energy of air, so that air enters the duct 300 from the large-diameter air inlet 320 and is accelerated and ejected from the small-diameter air outlet 310, thereby achieving the purpose of cooling the moving contact 400.

[0042] Further, the inner diameter of the duct 300 gradually increases from the air outlet 310 along the direction of the air inlet 320.

[0043] In other words, the inner diameter of the duct 300 gradually decreases linearly from one end of the air inlet 320 to one end of the air outlet 310. Therefore, after air enters the interior of the duct 300, due to the decrease in the inner diameter of the duct 300, the air flow is accelerated, ensuring that the gas can be ejected from the air outlet 310.

[0044] According to experiments, when the mounting base 200 rotates at a speed of 60° / ms, the speed of the contact can reach 2 m / s. Specifically, the flow rate of air at the air inlet 320 is 2 m / s, and the flow rate of air at the air outlet 310 of the duct 300 after acceleration is 2.9 m / s. Therefore, the air at the air outlet 310 generates an air flow of 0.9 m / s relative to the static air.

[0045] Specifically, the duct 300 is in the shape of a flared opening.

[0046] Further, the arc extinguishing structure 10 further includes a moving contact 400, and the moving contact 400 is arranged on the mounting base 200.

[0047] The moving contact 400 includes a contact portion 411 for contacting the static contact 500, and the air outlet 310 faces the contact portion 411; the duct 300 is configured to jet air flow through the air outlet 310 to the contact portion 411 in a state where the moving contact 400 moves away from the static contact 500 to open the circuit.

[0048] In this embodiment, by directly facing the air outlet 310 of the duct 300 to the contact portion 411 of the moving contact 400, the arc generated during the contact or separation between the contact portion 411 and the static contact 500 during closing or opening is directly blown, thereby generating a blowing arc effect and significantly improving the arc extinguishing performance.

[0049] Further, the moving contact 400 includes two contact pieces 410, the contact portion 411 is arranged at the end of the contact piece 410, and the two contact pieces 410 are arranged oppositely so that the two contact portions 411 are arranged oppositely; the air outlet 310 faces the two contact portions 411.

[0050] In this embodiment, the mounting base 200 drives the two contact pieces 410 to rotate synchronously, so that the contact portions 411 of the two contact pieces 410 are respectively in contact with the upper and lower sides of the static contact 500 to close the switch, or are separated to open the switch. Therefore, by directly facing the air outlet 310 towards the two contact portions 411 to directly blow on the arc, a blowing arc effect is generated, significantly improving the arc extinguishing performance.

[0051] Furthermore, the number of the contact portions 411 is two. The two contact portions 411 are connected to each other, and the connection portion of the two contact portions 411 is connected to the mounting base 200, so that the mounting base 200 can drive the two contact portions 411 to rotate simultaneously; of course, the number of the static contacts 500 is also two, so that the two contact portions 411 are respectively in contact with or separated from the two static contacts 500.

[0052] In this embodiment, the number of the ducts 300 is also two. The two ducts 300 respectively face the two contact portions 411, and the two ducts 300 are symmetrically arranged.

[0053] Furthermore, the arc extinguishing structure 10 further includes a static contact 500. The static contact 500 is arranged on the housing 100. In the state where the moving contact 400 and the static contact 500 are closed, the duct 300 is located on the side of the moving contact 400 away from the static contact 500.

[0054] In this embodiment, since the air outlet 310 faces the moving contact 400 and the air inlet 320 is away from the moving contact 400, therefore, only when the mounting base 200 rotates in the direction from the air outlet 310 towards the air inlet 320, that is, during the process of the moving contact 400 moving away from the static contact 500 to open the switch, an accelerated air flow will be generated in the duct 300 and ejected towards the moving contact 400 through the air outlet 310.

[0055] In summary, the embodiment of the present invention provides an arc extinguishing structure 10. By synchronously rotating the duct 300 and the mounting base 200, and blowing air towards the moving contact 400 through the air outlet 310, the blown air can not only cool the moving contact 400, but also generate a blowing arc effect. Therefore, the arc extinguishing performance is improved, and the ablation phenomenon between the moving contact 400 and the static contact 500 is avoided, thereby prolonging their service life.

[0056] Furthermore, the embodiment of the present invention also provides a change-over switch, which includes the arc extinguishing structure 10 in the above embodiment.

[0057] Furthermore, the embodiment of the present invention also provides an electrical equipment, which is equipped with the aforementioned change-over switch. The electrical equipment can be configured as at least one of the following: distribution box, cable, distribution cabinet, motor, switch socket, lamp, air conditioner, electric water heater, electric meter, camera, telephone, computer, etc. This electrical equipment can utilize the relevant structure of the change-over switch in this application to achieve intelligent management. However, it is not limited to the electrical equipment for intelligent management above, and can also be applied to the non-intelligent power distribution equipment in traditional industries.

[0058] The embodiment of this application also provides an electrical equipment, applying the aforementioned change-over switch to the electrical equipment. The electrical equipment can be applied to intelligent scenarios, such as smart home, Internet of Things industry and more intelligent scenarios, to achieve intelligent management.

[0059] Optionally, the embodiment of this application can be used for: fire protection electricity use: first-level such as fire control room, fire pump, smoke prevention and exhaust facilities, fire elevator and its drainage pump, fire emergency lighting, etc.; aisle lighting, duty lighting, guard lighting, obstacle marker lights; rail transit; security system power supply; electronic information computer room power supply; passenger elevator power; sewage pump; variable frequency speed regulation constant pressure water supply domestic pump; main offices, meeting rooms, general duty rooms and archives, etc.

[0060] It can be understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided by the embodiments of this application. The technical solutions of this application can also be applied to other scenarios. For example, as known to those of ordinary skill in the art, with the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are equally applicable to similar technical problems.

[0061] The units in the equipment of the embodiment of this application can be combined, divided and deleted according to actual needs.

[0062] In this application, for the description of the same or similar term concepts, technical solutions and / or application scenarios, generally only the first detailed description is made when it first appears. When it appears repeatedly later, for the sake of brevity, it is generally not repeated. When understanding the technical solutions and other contents of this application, for the same or similar term concepts, technical solutions and / or application scenarios that are not detailed later, reference can be made to the relevant detailed descriptions before.

[0063] In this application, the descriptions of each embodiment have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0064] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims described above.

Claims

1. An arc extinguishing structure, characterized in that, it includes: a housing (100); a mounting base (200), the mounting base (200) is rotatably arranged on the housing (100), and the mounting base (200) is used for mounting a moving contact (400); a duct (300), the duct (300) is arranged on one side of the mounting base (200), the duct (300) is provided with an air outlet (310), the air outlet (310) is used for facing the moving contact (400), and the duct (300) is used for rotating synchronously with the mounting base (200) so that air flows through the air outlet (310) towards the moving contact (400).

2. The arc extinguishing structure according to claim 1, characterized in that, the duct (300) is further provided with an air inlet (320), and the contour area of the air inlet (320) is larger than the contour area of the air outlet (310).

3. The arc extinguishing structure according to claim 2, characterized in that, the inner diameter of the duct (300) gradually increases along the direction of the air inlet (320) from the air outlet (310).

4. The arc extinguishing structure according to claim 2, characterized in that, the duct (300) is in a flared shape.

5. The arc extinguishing structure according to claim 1, characterized in that, the arc extinguishing structure further includes a moving contact (400), and the moving contact (400) is arranged on the mounting base (200); the moving contact (400) includes a contact portion (411), the contact portion (411) is used for contacting with a static contact (500), and the air outlet (310) faces the contact portion (411); the duct (300) is used for jetting air flow through the air outlet (310) towards the contact portion (411) when the moving contact (400) moves away from the static contact (500) to the open state.

6. The arc extinguishing structure according to claim 5, characterized in that, the moving contact (400) includes two contact pieces (410), the contact portion (411) is arranged at the end of the contact piece (410), and the two contact pieces (410) are arranged oppositely so that the two contact portions (411) are arranged oppositely; the air outlet (310) faces the two contact portions (411).

7. The arc extinguishing structure according to claim 5, characterized in that, the number of the contact portions (411) and the ducts (300) is two, the two ducts (300) respectively face the two contact portions (411), and the two ducts (300) are symmetrically arranged.

8. The arc extinguishing structure according to claim 1, characterized in that, the arc extinguishing structure further includes a static contact (500), the static contact (500) is arranged on the housing (100), and the duct (300) is located on the side where the moving contact (400) is away from the static contact (500).

9. A change-over switch, characterized in that, it includes the arc extinguishing structure according to any one of claims 1-8.

10. An electrical equipment, characterized in that, it includes the change-over switch according to claim 9.

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