High-safety alternating current relay for solar photovoltaic inverter

Abstract

The utility model belongs to the technical field of alternating-current relays for photovoltaic inverters, and discloses a high-safety alternating-current relay for a solar photovoltaic inverter, which comprises a base, a matching groove is arranged on the base, a coil rack is mounted in the matching groove, a coil is arranged on the coil rack, an armature is arranged on the coil rack, and the alternating-current relay is arranged on the base. A movable spring terminal is installed on one side of the armature, an injection molding part is fixedly connected between the armature and the movable spring terminal, and a notch is formed in the injection molding part. According to the utility model, the injection molding part is arranged, the armature and the movable spring terminal are injection-molded together through the injection molding part, so that the strong current end is isolated from the weak current end, and the notch is designed on the injection molding part, so that the creepage distance of the surface of the plastic part is increased, and the product can meet the requirements of the existing solar photovoltaic power generation on a solar photovoltaic inverter.

Description

Technical Field

[0001] The utility model belongs to the technical field of AC relays for photovoltaic inverters, and in particular relates to a high-safety AC relay for solar photovoltaic inverters. Background Art

[0002] In solar photovoltaic systems, AC relays are used to switch between different circuit states. For example, when the DC power generated by solar panels is converted to AC power by an inverter, the AC relay can output the AC power to the grid or local loads according to system needs. In the event of a system failure or maintenance, the AC relay can quickly disconnect the circuit to protect equipment and personnel.

[0003] As solar photovoltaic power generation technology matures, the specifications and requirements for the use of solar photovoltaic inverters are becoming increasingly stringent. Relays, as safety devices on the AC side of the inverter, need to have longer creepage distances and higher electrical clearances. Utility Model Content

[0004] In order to solve the above problems, the purpose of the present utility model is to provide a highly safe AC relay for a solar photovoltaic inverter.

[0005] To achieve the above-mentioned objectives, the present invention proposes a high-safety AC relay for a solar photovoltaic inverter, comprising a base, a mating groove provided on the base, a coil frame installed in the mating groove, a coil provided on the coil frame, an armature provided on the coil frame, a movable spring terminal installed on one side of the armature, an injection molded part fixedly connected between the armature and the movable spring terminal, and a notch provided on the injection molded part.

[0006] In one example, a placement groove is provided on the base, a compression spring is placed in the placement groove, the compression spring is located between the base and the coil frame, the compression spring is used to squeeze and fix the armature, and a clamping groove is provided on both sides of the armature. A yoke is clamped on the coil frame, and the yoke is used to clamp the armature.

[0007] In one example, a dynamic spring sheet is provided on one side of the dynamic spring terminal, a contact bridge is installed on one side of the dynamic spring sheet, two static spring feet are connected to one side of the contact bridge, two through slots are provided on the base, the static spring feet pass through the through slots on the base, and hooks are provided on both sides of the static spring feet. The hooks are in the shape of conical protrusions, and the hooks are used to press against the side walls of the base to fix the static spring feet.

[0008] In one example, the movable spring terminal is provided with two bosses, and the movable spring piece is provided with two rivet holes matched with the bosses.

[0009] In one example, a rivet hole is provided on one side of the static spring leg, a protrusion is provided on one side of the contact bridge, and the static spring leg is fixed to the contact bridge through the protrusion and the rivet hole.

[0010] In one example, pins are installed on the coil frame, and the base is provided with a sealing groove at the position of the pins, and the pins are fixed in the sealing groove.

[0011] In one example, a plurality of arc-shaped blocks are fixedly connected to the outer side of the base, an injection-molded shell is provided on the outer side of the base, and a slot matching the arc-shaped blocks is provided on the injection-molded shell.

[0012] The high-safety AC relay for solar photovoltaic inverter proposed by the utility model can bring the following beneficial effects:

[0013] First, by providing an injection molded part, the armature and the movable spring terminal are injection molded together. The injection connection method can make the weak current end of the armature and the strong current end of the movable spring terminal fixedly connected through plastic, so that the strong current end and the weak current end are isolated. The notch designed on the injection molded part increases the creepage distance of the plastic part surface, so that the product can meet the current requirements of solar photovoltaic power generation for solar photovoltaic inverters;

[0014] Secondly, the contact bridge and the two static spring legs are installed and contacted with the rivet holes through the protrusions, and the dynamic spring piece and the dynamic spring terminal are installed and contacted with the rivet holes through the bosses, so that the static spring legs, the contact bridge, the dynamic spring piece, and the dynamic spring terminal are in contact and connected, and the dynamic spring terminal is connected to the armature through the injection molding part. Through the bridge-type assembly method, installation and disassembly are very convenient, and the electrical clearance is increased at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0016] In the attached figure:

[0017] Figure 1 The utility model is a structural schematic diagram of a high-safety AC relay for a solar photovoltaic inverter.

[0018] Figure 2 The utility model is a structural schematic diagram of a coil frame of an AC relay for a high-safety solar photovoltaic inverter.

[0019] Figure 3 The utility model is a structural schematic diagram of an injection molded part of an AC relay for a high-safety solar photovoltaic inverter.

[0020] Figure 4The utility model is a structural schematic diagram of a compression spring of an AC relay for a high-safety solar photovoltaic inverter.

[0021] Figure 5 The utility model is a structural schematic diagram of a contact bridge of an AC relay for a high-safety solar photovoltaic inverter.

[0022] In the figure: 1. Base; 2. Coil frame; 3. Armature; 4. Moving spring terminal; 5. Injection molded part; 6. Compression spring; 7. Moving spring leaf; 8. Contact bridge; 9. Static spring foot; 10. Pin; 11. Arc-shaped clamping block; 12. Injection molded shell. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0024] like Figures 1 to 5 As shown, an embodiment of the utility model proposes a high-safety AC relay for a solar photovoltaic inverter, comprising a base 1, a matching groove being provided on the base 1, a coil frame 2 being installed in the matching groove, a coil being provided on the coil frame 2, an armature 3 being provided on the coil frame 2, a movable spring terminal 4 being installed on one side of the armature 3, an injection molded part 5 being fixedly connected between the armature 3 and the movable spring terminal 4, a notch being provided on the injection molded part 5, a placement groove being provided on the base 1, a compression spring 6 being placed in the placement groove, the compression spring 6 being located between the base 1 and the coil frame 2, the compression spring 6 being used for squeezing and fixing the armature 3, clamping grooves being provided on both sides of the armature 3, a yoke being clamped on the coil frame 2, the yoke being used for clamping the armature 3, and when the compression spring 6 is located in the placement groove, the protrusion in the placement groove contacts the compression spring 6, thereby exerting pressure on the compression spring 6 To fix the armature 3, the compression spring 6 is used to squeeze and fix the armature 3. The compression spring 6 is L-shaped, and an elastic sheet is provided on the compression spring 6 to resist the coil frame 2. The L-shaped shape fixes the coil frame 2 in the matching groove. The coil frame 2 is vertically installed in the matching groove on the base 1. The vertical installation method reduces the impact of the size on product assembly. Among the internal components, the armature 3 and the movable spring terminal 4 are injection molded together by means of an injection molded part 5. The injection molding connection method can make the weak current end of the armature 3 and the strong current end of the movable spring terminal 4 fixedly connected through plastic, so that the strong current end is isolated from the weak current end, and the notch designed on the injection molded part 5 increases the creepage distance of the plastic surface, so that the product can meet the current requirements of solar photovoltaic power generation for solar photovoltaic inverters.

[0025] like Figure 2 、 Figure 3 and Figure 4As shown, a dynamic spring piece 7 is provided on one side of the dynamic spring terminal 4, and a contact bridge 8 is installed on one side of the dynamic spring piece 7. One side of the contact bridge 8 is connected to two static spring feet 9. Two through slots are provided on the base 1. The static spring foot 9 passes through the through slots on the base 1. Hooks are provided on both sides of the static spring foot 9. The hook is in the shape of a conical protrusion. The hook is used to press against the side wall of the base 1 to fix the static spring foot 9. Two bosses are provided on the dynamic spring terminal 4. Two rivet holes matching the bosses are provided on the dynamic spring piece 7. Rivet holes are provided on one side of the static spring foot 9. A protrusion is provided on one side of the contact bridge 8. The static spring foot 9 is fixed to the contact bridge 8 through the protrusion and the rivet hole. The contact bridge 8 and the two static spring feet 9 are installed and connected through the protrusion and the rivet hole. The static spring foot 9 is in T-shape with conical raised hooks on both sides, which are used to press against the side wall of the base 1 during installation to fix the static spring foot 9. At the same time, the T-shaped structure prevents the static spring foot 9 from passing through the base 1 and causing it to fall off. A cone-like structure is provided at the bottom of the static spring foot 9 to facilitate the insertion of the static spring foot 9 into the through groove on the base 1 for installation.

[0026] like Figure 1 and Figure 5 As shown, a pin 10 is installed on the coil frame 2, and a sealing groove is provided on the base 1 at the position of the pin 10. The pin 10 is fixed in the sealing groove. The pin 10 passes through the base 1 and is sealed by filling the sealing groove with glue to achieve a tight installation of the pin 10.

[0027] like Figure 1 As shown, a plurality of arc-shaped blocks 11 are fixedly connected to the outer side of the base 1, and an injection-molded shell 12 is provided on the outer side of the base 1. The injection-molded shell 12 is provided with a slot that matches the arc-shaped block 11. The injection-molded shell 12 covers the internal components. The injection-molded shell 12 is fixed to the slot through the arc-shaped block 11, and is easy to install and use.

[0028] Working principle: The coil frame 2 is vertically installed in the matching groove on the base 1, the armature 3 and the dynamic spring terminal 4 are injection molded together by means of an injection molded part 5, the contact bridge 8 and the two static spring legs 9 are installed in contact with the rivet holes through the protrusions, and the dynamic spring piece 7 and the dynamic spring terminal 4 are installed in contact with the rivet holes through the bosses, so that the static spring legs 9, the contact bridge 8, the dynamic spring piece 7, and the dynamic spring terminal 4 are in contact and connected, and the internal components are covered by the injection molded shell 12 on the outside.

[0029] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0030] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A high-safety AC relay for solar photovoltaic inverter, characterized in that: The invention comprises a base (1), wherein the base (1) is provided with a matching groove, a coil frame (2) is installed in the matching groove, a coil is provided on the coil frame (2), an armature (3) is provided on the coil frame (2), a movable spring terminal (4) is installed on one side of the armature (3), an injection molded part (5) is fixedly connected between the armature (3) and the movable spring terminal (4), and a notch is provided on the injection molded part (5).

2. A high-safety AC relay for solar photovoltaic inverter according to claim 1, characterized in that: The base (1) is provided with a placement groove, a compression spring (6) is placed in the placement groove, the compression spring (6) is located between the base (1) and the coil frame (2), the compression spring (6) is used to squeeze and fix the armature (3), and slots are provided on both sides of the armature (3). A yoke is clamped on the coil frame (2), and the yoke is used to clamp the armature (3).

3. A high-safety AC relay for solar photovoltaic inverter according to claim 1, characterized in that: A moving spring sheet (7) is provided on one side of the moving spring terminal (4), a contact bridge (8) is installed on one side of the moving spring sheet (7), two static spring legs (9) are connected to one side of the contact bridge (8), two through slots are provided on the base (1), the static spring legs (9) pass through the through slots on the base (1), and hooks are provided on both sides of the static spring legs (9), which are in the shape of conical protrusions, and the hooks are used to press against the side wall of the base (1) to fix the static spring legs (9).

4. A high-safety AC relay for solar photovoltaic inverter according to claim 3, characterized in that: The movable spring terminal (4) is provided with two bosses, and the movable spring piece (7) is provided with two rivet holes that match the bosses.

5. The high-safety AC relay for solar photovoltaic inverter according to claim 3, characterized in that: One side of the static spring foot (9) is provided with a rivet hole, one side of the contact bridge (8) is provided with a protrusion, and the static spring foot (9) is fixed to the contact bridge (8) via the protrusion and the rivet hole.

6. A high-safety AC relay for solar photovoltaic inverter according to claim 1, characterized in that: A pin (10) is mounted on the coil frame (2), and a sealing groove is provided on the base (1) at the position of the pin (10), and the pin (10) is fixed in the sealing groove.

7. A high-safety AC relay for solar photovoltaic inverter according to claim 1, characterized in that: A plurality of arc-shaped clamping blocks (11) are fixedly connected to the outer side of the base (1), an injection-molded shell (12) is provided on the outer side of the base (1), and a clamping groove matching the arc-shaped clamping blocks (11) is provided on the injection-molded shell (12).

Images