Shielding isolation device

Abstract

The utility model embodiment provides a kind of shielding isolation device, comprising: box body and electrical device, box body includes front panel, isolation layer and back panel, isolation layer is into first cavity and second cavity with box body, first cavity between front panel and isolation layer, second cavity between back panel and isolation layer;Electrical device includes alternating current input interface, alternating current output interface, series in the residual current operating circuit breaker and filter between alternating current input interface and alternating current output interface;Electrical device further includes oil engine input interface, oil engine output interface, and second circuit breaker is series between oil engine input interface and oil engine output interface;Residual current operating circuit breaker, filter and second circuit breaker are all located in first cavity, residual current operating circuit breaker realizes protection function, when mains output interface occurs overload or short circuit, power supply is cut off in time, ensure personnel and equipment safety, simultaneously have leakage current protection function, and structural design has good shielding capacity.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted shielding and isolation, and more specifically, to a shielding and isolation device. Background Technology

[0002] Vehicle power supply shielding devices are crucial equipment used to protect vehicle power systems from electromagnetic interference, overvoltage, short circuits, and other faults. They typically consist of an electromagnetic shielding structure, overvoltage protection circuitry, filtering components, and a metal shielding housing. These devices effectively shield external electromagnetic fields from interference with electronic components within the power system, while preventing damage to the vehicle's electronic control system due to excessive voltage or current. For example, by employing transient suppression circuits composed of gas discharge tubes and varistors, as well as LC-based filtering and delay circuits, the device can quickly respond to and suppress strong electromagnetic pulses and common-mode interference, ensuring the stable operation of the vehicle power system. Furthermore, its independent metal shielding housing design prevents internal energy coupling, further enhancing electromagnetic compatibility. It is widely used in new energy vehicles, communication vehicles, and other vehicle applications with high requirements for power safety and electromagnetic compatibility. However, existing shielding devices often have poor shielding effectiveness and unreasonable structural and circuit designs. Utility Model Content

[0003] This utility model provides a shielding and isolation device to at least solve the problem of poor shielding and isolation effect in related technologies.

[0004] According to one embodiment of the present invention, a shielding and isolation device is provided, comprising: a housing and an electrical device. The housing includes a front panel, an isolation layer and a rear panel. The isolation layer divides the housing into a first cavity and a second cavity. The first cavity is between the front panel and the isolation layer, and the second cavity is between the rear panel and the isolation layer. The electrical device includes an AC input interface, an AC output interface, a residual current operated circuit breaker and a filter connected in series between the AC input interface and the AC output interface; The electrical device also includes a generator input interface and a generator output interface, and a second circuit breaker is connected in series between the generator input interface and the generator output interface. The residual current operated circuit breaker, the filter, and the second circuit breaker are all located in the first cavity.

[0005] Furthermore, a surge protector is connected in parallel between the residual current operated circuit breaker and the filter.

[0006] Furthermore, a mains power indicator light is connected in parallel between the residual current operated circuit breaker and the filter.

[0007] Furthermore, the surge protector is located in the first cavity.

[0008] Furthermore, the housing is made of 304 stainless steel.

[0009] Furthermore, the second cavity is a sealed second cavity.

[0010] This invention provides a residual current circuit breaker with overload and short-circuit protection functions. When an overload or short circuit occurs at the mains output interface of the power supply box, the power supply is cut off in time to ensure the safety of personnel and equipment. It also has leakage current protection function. When the leakage current reaches the rated operating current, the mains circuit can automatically cut off the power output. In addition, the surge protector ensures that the power supply input side has lightning protection function, and the mains power supply circuit has power filtering function to achieve electromagnetic shielding. At the same time, a sealed second cavity is set in the structure to reduce the propagation path of electromagnetic interference. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the front panel of a shielding and isolation device according to an embodiment of the present utility model; Figure 2 This is a cross-sectional view showing the internal structure of a shielding and isolation device according to an embodiment of the present utility model; Figure 3 This is a schematic diagram illustrating the back structure of a shielding and isolation device according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the electrical device embodying a shielding and isolation device according to an embodiment of the present utility model.

[0012] In the diagram, 11. Front panel; 12. Isolation layer; 13. Rear panel; 14. First cavity; 15. Second cavity; 21. AC input interface; 22. AC output interface; 23. Residual current operated circuit breaker; 24. Filter; 25. Surge protector; 26. Mains indicator light; 31. Generator input interface; 32. Generator output interface; 33. Second circuit breaker; 34. Generator indicator light; 41. Test ground input interface; 42. Test ground output interface; 43. Vehicle body ground input interface; 44. Vehicle body ground output interface; 5. Mains switch; 6. Generator switch; 7. Lightning arrester. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0014] Example: A shielding and isolation device, including a housing and electrical components, see reference. Figures 1 to 3 As shown, the housing includes a front panel 11, an isolation layer 12, and a rear panel 13. The isolation layer 12 divides the housing into a first cavity 14 and a second cavity 15. The first cavity 14 is located between the front panel 11 and the isolation layer 12, and the second cavity 15 is located between the rear panel 13 and the isolation layer 12. In this embodiment, the first cavity 14 is used to house electrical devices, and the second cavity 15 is a sealed cavity, thereby isolating electromagnetic interference. The gaps in the housing structure are sealed with conductive materials to reduce the propagation path of electromagnetic interference. Furthermore, no surface coating is applied at the contact points between the shielding isolation device and the shelter, ensuring a good electrical connection between the two when the device is installed on the shelter, thus improving the overall shielding capability. The housing is made of highly conductive 304 stainless steel, which provides a certain level of electromagnetic shielding.

[0015] Reference Figure 4 As shown, the electrical device includes an AC input interface 21 and an AC output interface 22. In this embodiment, both the AC input interface 21 and the AC output interface 22 are three-core wires, and the interfaces use aviation connectors. The input interface is model Y50DX-2003ZJ10, and the output interface is model Y50DX-2003ZK10. It also includes a residual current circuit breaker 23 connected in series between the AC input interface 21 and the AC output interface 22. In this embodiment, the residual current circuit breaker 23 is an air switch with leakage current protection, and the leakage current protection trigger current is selected as 50mA. This design achieves the functional requirements of "overload, short circuit, and leakage current protection" for the mains circuit. It also includes a filter 24 connected in series between the residual current circuit breaker 23 and the AC output interface 22, which provides electromagnetic shielding at the mains input terminal. Meanwhile, a surge protector 25, model TTB-C / 2P-CJ, is connected in parallel between the residual current circuit breaker 23 and the filter 24 for lightning protection. Additionally, a mains power indicator 26 is installed between the residual current circuit breaker 23 and the filter 24 to indicate whether the mains power is on. The mains power indicator 26 is located in front of the surge protector 25.

[0016] It also includes a generator input interface 31 and a generator output interface 32. A second circuit breaker 33 is provided between the generator input interface 31 and the generator output interface 32 to control the opening and closing of the generator circuit. In this embodiment, the second circuit breaker 33 is provided on the live wire between the generator input interface 31 and the generator output interface 32. At the same time, a generator indicator light 34 is also connected in parallel between the generator input interface 31 and the generator output interface 32 to observe the generator circuit.

[0017] It also includes a test ground input interface 41 and a test ground output interface 42 with one connection, as well as a vehicle body input interface 43 and a vehicle body output interface 44.

[0018] The electrical device also includes a generator input interface 31 and a generator output interface 32, with a second circuit breaker 33 connected in series between the generator input interface 31 and the generator output interface 32.

[0019] The AC input interface 21, generator input interface 31, test ground input interface 41, vehicle ground input interface 43, mains power indicator 26, and generator indicator 34 are all located on the front panel 11. The front panel 11 also includes a mains power switch 5, a generator switch 6, and a surge arrester 7. The AC output interface 22, generator output interface 32, test ground output interface 42, and vehicle ground output interface 44 are all located on the rear panel 13.

[0020] The residual current operated circuit breaker 23 in the above embodiments provides overload and short-circuit protection. When an overload or short circuit occurs at the mains output interface of the power supply box, the power supply is promptly cut off to ensure the safety of personnel and equipment. It also has leakage current protection. When the leakage current reaches the rated operating current, the mains circuit can automatically cut off the power output. At the same time, the surge protector 25 ensures that the power supply input side has lightning protection, and the mains power supply circuit has power filtering function to achieve electromagnetic shielding.

[0021] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application.

[0022] The terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit the invention. The singular forms "a," "the," and "the" used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that in the description of this application, unless otherwise stated, " / " indicates that the objects before and after are in an "or" relationship; for example, A / B can mean A or B. "And / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural.

[0023] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrase “if determination” or “if detection (of the condition or event of the statement)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the condition or event of the statement)” or “in response to detection (of the condition or event of the statement).”

[0024] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application 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 of the technical features. 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 application.

Claims

1. A shielding and isolation device, characterized in that, include: The housing and electrical device, the housing including a front panel (11), an isolation layer (12) and a rear panel (13), the isolation layer (12) dividing the housing into a first cavity (14) and a second cavity (15), the first cavity (14) being between the front panel (11) and the isolation layer (12), and the second cavity (15) being between the rear panel (13) and the isolation layer (12); The electrical device includes an AC input interface (21), an AC output interface (22), a residual current operated circuit breaker (23) connected in series between the AC input interface (21) and the AC output interface (22), and a filter (24); The electrical device also includes a generator input interface (31) and a generator output interface (32), and a second circuit breaker (33) is connected in series between the generator input interface (31) and the generator output interface (32); The residual current operated circuit breaker (23), the filter (24), and the second circuit breaker (33) are all located in the first cavity (14).

2. The apparatus according to claim 1, characterized in that, A surge protector is also connected in parallel between the residual current operated circuit breaker (23) and the filter (24).

3. The apparatus according to claim 2, characterized in that, A mains indicator light (26) is also connected in parallel between the residual current operated circuit breaker (23) and the filter (24).

4. The apparatus according to claim 3, characterized in that, The surge protector is located in the first cavity (14).

5. The apparatus according to claim 1, characterized in that, The box is made of 304 stainless steel.

6. The apparatus according to claim 1, characterized in that, The second cavity (15) is a closed second cavity (15).

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