A power through-wall terminal and power conversion device supporting on-grid and off-grid switching

Abstract

The utility model discloses a kind of power wall-penetrating terminals and power conversion equipment supporting and off-grid switching, including base and first, second wiring module of its two sides;First wiring module includes outer grid-connected wiring part and outer off-grid wiring part of side-by-side arrangement along first direction, and outer grid-connected wiring part and outer off-grid wiring part are staggered distribution along second direction height;Second wiring module includes inner grid-connected wiring part and inner off-grid wiring part of side-by-side arrangement along first direction, wherein, inner, outer grid-connected wiring part is connected one by one, inner, outer off-grid wiring part is connected one by one, and inner grid-connected wiring part and inner off-grid wiring part are all equipped with temperature sampling wiring port.The wall-penetrating terminal passes through high integration multiway grid-connected interface and off-grid interface, so that terminal structure overall layout is compact, can effectively reduce design volume, reduce design cost;Temperature sampling wiring port can detect the temperature of wiring part junction, prevent terminal temperature rise caused by improper client wiring, and avoid security risk caused by high temperature.

Description

Technical Field

[0001] This utility model relates to the field of connectors for power equipment, and more particularly to a power through-wall terminal and power conversion device that supports and enables off-grid switching. Background Technology

[0002] Current inverters with grid-connected and off-grid functions (such as...) Figure 6 In the three-phase four-wire grid-connected main circuit, an outgoing line is led out between the two relays, and an additional relay is added in the middle to form an off-grid port, supporting load operation. The AC terminals typically use 8 single-pin terminals or two 4-pin through-wall terminals, lacking a through-wall terminal that simultaneously supports grid-connected / off-grid switching.

[0003] In existing solutions, both 8 single-pin terminals and 2 4-pin through-wall terminals have shortcomings such as insufficient compactness of AC terminal layout and complex sealing design, which leads to excessively large machine size and increased cost.

[0004] Based on the above problems, this application proposes a power through-wall terminal with a compact overall structure, reliable sealing, and support for on-grid and off-grid switching. Utility Model Content

[0005] The purpose of this utility model is to provide a power through-wall terminal and power conversion device that supports on-grid and off-grid switching. By highly integrating multiple on-grid and off-grid connectors, the design volume of the terminal is reduced and the number of sealing interfaces is decreased.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A power through-wall terminal that supports on-grid and off-grid switching includes a base and first and second wiring modules disposed on its two sides;

[0008] The first wiring module includes an external grid-connected wiring component and an external off-grid wiring component arranged side by side along a first direction, and the external grid-connected wiring component and the external off-grid wiring component are staggered in height along a second direction;

[0009] The second wiring module includes an inner grid-connected wiring component and an inner off-grid wiring component arranged side by side along a first direction. The inner and outer grid-connected wiring components are connected in pairs, and the inner and outer off-grid wiring components are connected in pairs. Both the inner grid-connected wiring component and the inner off-grid wiring component are provided with temperature sampling terminals.

[0010] In an alternative embodiment, the front of the base is provided with a first mounting cavity, and the first wiring module is completely housed within the first mounting cavity.

[0011] In one alternative embodiment, a first partition is provided between adjacent external grid-connected connectors and adjacent external off-grid connectors.

[0012] In an alternative embodiment, a second mounting cavity is provided on the back of the base, and the second wiring module is completely housed within the second mounting cavity.

[0013] In one alternative embodiment, a second partition is provided between adjacent internal grid-connected connectors, adjacent internal off-grid connectors, and between the internal grid-connected connectors and the internal off-grid connectors.

[0014] In an alternative embodiment, only one sealing ring is provided between the first and second wiring modules and the base.

[0015] In an alternative embodiment, the internal grid-connected connector and the internal off-grid connector have the same structure, both including:

[0016] A stud includes a first threaded segment and a second threaded segment integrally connected, wherein the diameter of the second threaded segment is smaller than the diameter of the first threaded segment;

[0017] The first nut connects to the first screw segment and forms an internal grid-connected / internal off-grid connection port at the connection point;

[0018] The second nut connects to the second screw segment and forms a temperature sampling connection port at the connection point.

[0019] In an alternative embodiment, the internal grid-connected connector and the internal off-grid connector have the same structure, both including a screw and a third nut;

[0020] The third nut connects to the screw and forms an internal grid / internal off-grid connection port at the connection point, while the head of the screw forms a temperature sampling connection port.

[0021] In an alternative embodiment, the front of the base is provided with a removable decorative panel.

[0022] A power conversion device includes the power through-wall terminal that supports off-grid switching as described above.

[0023] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0024] 1. The highly integrated multi-channel grid-connected and off-grid interfaces result in a compact overall layout of the terminal structure, which can effectively reduce the design volume and lower the design cost.

[0025] 2. The highly integrated terminals effectively reduce the sealing interface, while the sealing structure design is more simplified, thereby improving the reliability of the seal.

[0026] 3. The temperature sampling connection port can detect the temperature at the connection point of the connector, preventing the terminal temperature from rising due to improper wiring by the client and avoiding safety hazards caused by high temperature. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the front of the power through-wall terminal that supports off-grid switching according to this utility model.

[0028] Figure 2 This is a schematic diagram of the back of the power through-wall terminal that supports off-grid switching according to this utility model.

[0029] Figure 3 This is a cross-sectional view of the power through-wall terminal that supports off-grid switching according to this utility model.

[0030] Figure 4 This is another structural schematic diagram of the back of the power through-wall terminal that supports off-grid switching according to this utility model.

[0031] Figure 5 This is a schematic diagram of the structure of the power through-wall terminal that supports on-grid and off-grid switching after the decorative panel is installed.

[0032] Figure 6 This is a circuit diagram of an inverter with grid-connected and off-grid functions in the existing technology.

[0033] In the figure: 1. Base; 11. First mounting cavity; 12. First partition; 13. Second mounting cavity; 14. Second partition;

[0034] 2. First wiring module; 21. External grid connection component; 22. External off-grid connection component;

[0035] 3. Second wiring module; 31. Internal grid-connected wiring component; 32. Internal off-grid wiring component; 3a. Stud; 3b. First nut; 3c. Second nut; 3d. Screw; 3e. Third nut; 3f. Internal grid-connected / internal off-grid wiring port; 3g. Temperature sampling wiring port;

[0036] 4. Sealing ring;

[0037] 5. Decorative panels;

[0038] 6. Interference structure. Detailed Implementation

[0039] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0040] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0041] See Figures 1 to 4 As shown, this utility model discloses a power through-wall terminal that supports and switches between grid and off-grid, including a base 1 and first and second wiring modules 2 and 3 disposed on its two sides.

[0042] The first wiring module 2 includes an external grid-connected connector 21 and an external off-grid connector 22. The external grid-connected connector 21 and the external off-grid connector 22 are arranged side-by-side along a first direction, and are also staggered in height along a second direction to facilitate external wiring operations. As an example, in this application, the first direction can be the X-axis direction, and the second direction can be the Y-axis direction. Furthermore, to meet the inverter's grid-connected / off-grid switching requirements, there are four external grid-connected connectors 21 and four external off-grid connectors 22, each arranged side-by-side along the X-axis direction and staggered in height along the Y-axis direction.

[0043] The second wiring module 3 includes an internal grid-connected connector 31 and an internal off-grid connector 32; wherein the internal grid-connected connector 31 and the internal off-grid connector 32 are also arranged side by side along the first direction. For example, in this application, there are four grid-connected connectors and four internal off-grid connectors 32, which can also be arranged side by side along the X-axis direction, and the internal and external grid-connected connectors 31 and 21 are connected one to one, and the internal and external off-grid connectors 32 and 22 are connected one to one, thereby realizing the connection of the grid-connected and off-grid connectors inside and outside the terminal.

[0044] In addition, both the internal grid connection 31 and the internal off-grid connection 32 are equipped with temperature sampling ports 3g, which, together with a detection device (not shown), can sample the temperature at the corresponding connection points to prevent connection safety issues caused by overheating and improve the reliability of the internal connection of the through-wall terminal.

[0045] It is understandable that the through-wall terminal of this application, through highly integrated multi-channel grid-connected interface and off-grid interface, results in a compact overall layout of the terminal structure, which can effectively reduce the design volume and lower the design cost. On the other hand, the highly integrated terminal has only one sealing interface, which greatly reduces the complexity and improves the sealing reliability compared to the eight sealing interfaces of traditional 8-channel single-PIN terminals or the two sealing interfaces of two 4-PIN terminals. Furthermore, the 3g design of the temperature sampling connector can detect the temperature at the connection point of the connector. By detecting the temperature of the corresponding terminal in real time, it can prevent the terminal temperature from rising due to improper client wiring (such as loose nuts, undersized cables, poor terminal crimping, etc.), which could potentially burn out the equipment in severe cases, thus improving the safety and reliability of the connector connection.

[0046] See Figure 1 As shown, in some embodiments, a first mounting cavity 11 is provided on the front side of the base 1, which can be enclosed by the walls on both sides and one end of the base 1. The first wiring module 2 is completely housed within the first mounting cavity 11 to prevent it from being exposed or damaged.

[0047] Furthermore, a first partition 12 is provided between adjacent external grid-connected connectors 21 and adjacent external off-grid connectors 22. The first partition 12 can act as a wire harness to prevent interference between adjacent lines and ensure the reliability of the wiring.

[0048] See Figure 2 As shown, a second mounting cavity 13 is provided on the back of the base 1. The cavity has a rectangular structure and protrudes outward from the back of the base 1. The second wiring module 3 is completely housed within the second mounting cavity 13 to prevent it from being exposed or damaged.

[0049] Furthermore, a second partition 14 is provided between adjacent internal grid-connected connectors 31, adjacent internal off-grid connectors 32, internal grid-connected connectors 31 and internal off-grid connectors 32. The second partition 14 has a grid structure and is also used to prevent interference between adjacent lines and ensure the reliability of the wiring.

[0050] The first partition 12 and the second partition 14 are both insulating boards, and they can be integrally formed with the base 1.

[0051] See Figure 2 or Figure 4 As shown, in some embodiments, only one sealing ring 4 is provided between the first and second wiring modules 2 and 3 and the base 1, thereby simplifying the sealing structure design and improving the reliability of the seal.

[0052] See Figure 2 and Figure 3 As shown, in some embodiments, the internal grid connection component 31 and the internal off-grid connection component 32 have the same structure, both including a stud 3a, a first nut 3b and a second nut 3c.

[0053] The stud 3a includes a first screw segment and a second screw segment that are connected as one piece, and the diameter of the second screw segment is smaller than the diameter of the first screw segment. The first nut 3b connects to the first screw segment and forms an internal grid / internal grid connection port 3f at the connection. The second nut 3c connects to the second screw segment and forms a temperature sampling connection port 3g at the connection.

[0054] Or, such as Figure 4 As shown, in an alternative embodiment, the internal grid connection 31 and the internal off-grid connection 32 have the same structure, both including a screw 3d and a third nut 3e.

[0055] Among them, the third nut 3e connects to the screw 3d and forms an internal grid-connected / internal grid-off connection port 3f at the connection point, and a temperature sampling connection port 3g is formed at the cap of the screw 3d.

[0056] See Figure 5 As shown, in some embodiments, the front of the base 1 is provided with a removable decorative panel 5, which not only beautifies the appearance of the terminals but also protects the external grid connection component 21 and the external off-grid connection component 22. In this application, the decorative panel 5 can be interlocked with the walls on both sides of the base 1 through an interference structure 6, thereby realizing the functions of disassembly and fixation.

[0057] In addition, this utility model also discloses a power conversion device, such as an inverter with grid connection and off-grid function, including the power through-wall terminal that supports grid connection and off-grid switching as described above.

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A power through-wall terminal supporting on-grid / off-grid switching, characterized in that, Includes a base (1) and first and second wiring modules (2, 3) located on its two sides; The first wiring module (2) includes an external grid-connected wiring component (21) and an external off-grid wiring component (22) arranged side by side along a first direction, and the external grid-connected wiring component (21) and the external off-grid wiring component (22) are staggered in height along a second direction; The second wiring module (3) includes an inner grid-connected wiring component (31) and an inner off-grid wiring component (32) arranged side by side along the first direction. The inner and outer grid-connected wiring components (31, 21) are connected one-to-one, and the inner and outer off-grid wiring components (32, 22) are connected one-to-one. Both the inner grid-connected wiring component (31) and the inner off-grid wiring component (32) are provided with a temperature sampling connection port (3h).

2. The power through-wall terminal supporting on-grid / off-grid switching according to claim 1, characterized in that, The base (1) has a first mounting cavity (11) on its front side, and the first wiring module (2) is completely housed in the first mounting cavity (11).

3. The power through-wall terminal supporting on-grid / off-grid switching according to claim 2, characterized in that, A first partition (12) is provided between adjacent external grid-connected connectors (21) and adjacent external off-grid connectors (22).

4. The power through-wall terminal supporting on-grid / off-grid switching according to claim 1, characterized in that, The base (1) has a second mounting cavity (13) on its back side, and the second wiring module (3) is completely housed in the second mounting cavity (13).

5. The power through-wall terminal supporting on-grid / off-grid switching according to claim 4, characterized in that, A second partition (14) is provided between adjacent internal grid-connected connectors (31), adjacent internal grid-off connectors (32), and between internal grid-connected connectors (31) and internal grid-off connectors (32).

6. The power through-wall terminal supporting on-grid / off-grid switching according to claim 1, characterized in that, Only one sealing ring (4) is provided between the first and second wiring modules (2, 3) and the base (1).

7. The power through-wall terminal supporting on-grid / off-grid switching according to claim 1, characterized in that, The internal grid connection component (31) and the internal off-grid connection component (32) have the same structure, and both include: The stud (3a) includes a first threaded segment and a second threaded segment integrally connected, wherein the diameter of the second threaded segment is smaller than the diameter of the first threaded segment; The first nut (3b) connects to the first screw segment and forms an internal grid-connected / internal grid-off connection port (3f) at the connection point; The second nut (3c) connects to the second screw segment and forms a temperature sampling connection port (3g) at the connection.

8. The power through-wall terminal supporting on-grid / off-grid switching according to claim 1, characterized in that, The internal grid connection component (31) and the internal off-grid connection component (32) have the same structure, both including a screw (3d) and a third nut (3e). The third nut (3e) connects to the screw (3d) and forms an internal grid-connected / internal grid-off connection port (3f) at the connection point, and a temperature sampling connection port (3g) is formed at the cap of the screw (3d).

9. The power through-wall terminal supporting on-grid / off-grid switching according to claim 1, characterized in that, The base (1) has a removable decorative panel (5) on its front side.

10. A power conversion device, characterized in that, Includes a power through-wall terminal that supports off-grid switching as described in any one of claims 1-9.

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