Photovoltaic distributed inverter automatic energy-saving control device

Abstract

This utility model discloses an automatic energy-saving control device for a photovoltaic distributed inverter, including a protective shell. A power supply interface and an output interface are fixedly installed on the inner wall of the protective shell. A transparent window is fixedly connected to the inner wall of the protective shell. A control main board and a mounting plate are fixedly connected to the inner wall of the protective shell. An automatic energy-saving control structure is provided on the surface of the mounting plate. The automatic energy-saving control structure includes an inverter body fixedly connected to the surface of the mounting plate, and a D718 transistor is fixedly connected to the surface of the mounting plate. The transparent window corresponds to the position of a photoresistor. When the ambient light decreases from day to night, the photoresistor senses the weakening of the ambient light and the circuit starts working. When night turns into day, the circuit stops working due to increased light intensity. The advantage of this is that it can achieve automatic control, automatically changing its working state according to the ambient brightness, so that it does not work during the day and automatically works at night.

Description

Technical Field

[0001] This utility model relates to the field of inverter control technology, and in particular to an automatic energy-saving control device for photovoltaic distributed inverters. Background Technology

[0002] As a key electronic device, the inverter's core function is to convert direct current (DC) to alternating current (AC), a characteristic that makes it indispensable in many fields.

[0003] When an inverter is in use, it needs to automatically adjust its operation to save energy and electricity as day turns into night. This requires automatically changing its operating state based on ambient light, so that it does not work during the day and automatically works at night. To address this issue, an automatic energy-saving control device for photovoltaic distributed inverters is needed. Utility Model Content

[0004] The purpose of this utility model is to solve the problems raised by the prior art by proposing an automatic energy-saving control device for photovoltaic distributed inverters.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic energy-saving control device for a photovoltaic distributed inverter includes a protective housing. A power supply interface and an output interface are fixedly installed on the inner wall of the protective housing. A transparent window is fixedly connected to the inner wall of the protective housing. A control main board and a mounting plate are fixedly connected to the inner wall of the protective housing. An automatic energy-saving control structure is provided on the surface of the mounting plate.

[0007] Preferably, the automatic energy-saving control structure includes an inverter body fixedly connected to the surface of the mounting plate, a D718 transistor fixedly connected to the surface of the mounting plate, a 12V penta-pin relay and a BC547 transistor fixedly connected to the surface of the mounting plate.

[0008] Furthermore, the normally open contact of the D718 transistor is soldered to the emitter of the 12V pentagonal relay, and the collector of the BC547 transistor is soldered to the power supply coil of the 12V pentagonal relay.

[0009] Preferably, a 47K resistor is soldered to the base of the BC547 transistor, and the common terminal of the BC547 transistor is soldered to the emitter of the 12V pentagonal relay via a wire.

[0010] Furthermore, a photoresistor is soldered to the base of the BC547 transistor, and a current-limiting resistor is soldered to the base of the D718 transistor.

[0011] Preferably, a feedback winding is fixedly mounted on the surface of the inverter body, one end of which is welded to one end of a current-limiting resistor. A main winding is fixedly mounted on the surface of the inverter body, one end of which is welded to the collector of a D718 transistor. A center tap is fixedly mounted on the surface of the inverter body, one end of which is welded to the power supply coil of a 12V pentagonal relay. A connecting wire is welded to the surface of the 12V pentagonal relay. An input wire is welded to the surface of the power supply interface, one end of which is fixedly welded to the interior of the inverter body.

[0012] The beneficial effects of this utility model are as follows:

[0013] The transparent window corresponds to the position of the photoresistor. When the ambient light decreases and the day turns into night, the photoresistor senses the weakening of the ambient light and the circuit starts to work. When the night turns into day, the circuit will stop working when the light intensity is high. The advantage of this is that it can achieve automatic control, so that it can automatically change its working state according to the ambient brightness, so that it will not work during the day and will work automatically at night. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of an automatic energy-saving control device for a photovoltaic distributed inverter proposed in this utility model;

[0015] Figure 2 This is a cross-sectional view of the protective casing in an automatic energy-saving control device for a photovoltaic distributed inverter proposed in this utility model.

[0016] Figure 3 This is a schematic diagram of the planar structure of a 12-volt pentagonal relay in an automatic energy-saving control device for a photovoltaic distributed inverter proposed in this utility model.

[0017] In the diagram: 1. Protective casing; 2. Power supply interface; 3. Output interface; 4. Transparent window; 5. Control main board; 6. Mounting plate; 7. Inverter body; 8. D718 transistor; 9. 12V penta-pin relay; 10. BC547 transistor; 11. Photoresistor; 12. 47K resistor; 13. Current limiting resistor; 14. Feedback winding; 15. Center tap; 16. Main winding; 17. Connecting wires; 18. Input wires. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1-3An automatic energy-saving control device for a photovoltaic distributed inverter includes a protective shell 1. A power supply interface 2 and an output interface 3 are fixedly installed on the inner wall of the protective shell 1. A transparent window 4 is fixedly connected to the inner wall of the protective shell 1. A control main board 5 and a mounting plate 6 are fixedly connected to the inner wall of the protective shell 1. An automatic energy-saving control structure is provided on the surface of the mounting plate 6.

[0020] In this utility model, the automatic energy-saving control structure includes an inverter body 7 fixedly connected to the surface of the mounting plate 6, a D718 transistor 8 fixedly connected to the surface of the mounting plate 6, a 12V penta-pin relay 9 and a BC547 transistor 10 fixedly connected to the surface of the mounting plate 6.

[0021] In this invention, the normally open contact of the D718 transistor 8 is soldered to the emitter of the 12V pentaangular relay 9, and the collector of the BC547 transistor 10 is soldered to the power supply coil of the 12V pentaangular relay 9.

[0022] In this invention, a 47K resistor 12 is soldered to the base of the BC547 transistor 10, and the common terminal of the BC547 transistor 10 is soldered to the emitter of the 12V pentagram relay 9 via a wire.

[0023] In this invention, a photoresistor 11 is soldered to the base of the BC547 transistor 10, and a current-limiting resistor 13 is soldered to the base of the D718 transistor 8.

[0024] In this invention, a feedback winding 14 is fixedly mounted on the surface of the inverter body 7, and one end of the feedback winding 14 is welded to one end of the current limiting resistor 13. A main winding 16 is fixedly mounted on the surface of the inverter body 7, and one end of the main winding 16 is welded to the collector of the D718 transistor 8. A center tap 15 is fixedly mounted on the surface of the inverter body 7, and one end of the center tap 15 is welded to the power supply coil of the 12V pentagram relay 9. A connecting wire 17 is welded to the surface of the 12V pentagram relay 9. An input wire 18 is welded to the surface of the power supply interface 2, and one end of the input wire 18 is fixedly welded to the interior of the inverter body 7.

[0025] Working principle: The 12V pentaangular relay 9 with normally closed switch contacts is used to control the power supply of the inverter main body circuit 7. The collector of the BC547 transistor 10 is soldered to the power supply coil of the 12V pentaangular relay 9 to control the power supply of the relay. The 47K resistor 12 is the voltage divider bias resistor of the base of the BC547 transistor 10. The transparent window 4 corresponds to the position of the photoresistor 11. When the ambient light decreases from day to night, the photoresistor 11 senses the weakening of the ambient light and the circuit starts to work. When night turns into day, the circuit will stop working.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic energy-saving control device for a photovoltaic distributed inverter, comprising a protective casing (1), characterized in that, The inner wall of the protective shell (1) is fixedly equipped with a power supply interface (2) and an output interface (3). The inner wall of the protective shell (1) is fixedly connected with a transparent window (4). The inner wall of the protective shell (1) is fixedly connected with a control main board (5) and a mounting plate (6). The surface of the mounting plate (6) is provided with an automatic energy-saving control structure.

2. The automatic energy-saving control device for a photovoltaic distributed inverter according to claim 1, characterized in that, The automatic energy-saving control structure includes an inverter body (7) fixedly connected to the surface of the mounting plate (6), a D718 transistor (8) fixedly connected to the surface of the mounting plate (6), a 12V penta-angle relay (9) and a BC547 transistor (10) fixedly connected to the surface of the mounting plate (6).

3. The automatic energy-saving control device for a photovoltaic distributed inverter according to claim 2, characterized in that, The normally open contact of the D718 transistor (8) is soldered to the emitter of the 12V pentagram relay (9), and the collector of the BC547 transistor (10) is soldered to the power supply coil of the 12V pentagram relay (9).

4. The automatic energy-saving control device for a photovoltaic distributed inverter according to claim 2, characterized in that, A 47K resistor (12) is soldered to the base of the BC547 transistor (10), and the common terminal of the BC547 transistor (10) is soldered to the emitter of the 12V pentagram relay (9) via a wire.

5. The automatic energy-saving control device for a photovoltaic distributed inverter according to claim 2, characterized in that, A photoresistor (11) is soldered to the base of the BC547 transistor (10), and a current-limiting resistor (13) is soldered to the base of the D718 transistor (8).

6. The automatic energy-saving control device for a photovoltaic distributed inverter according to claim 2, characterized in that, A feedback winding (14) is fixedly installed on the surface of the inverter body (7). One end of the feedback winding (14) is welded to one end of the current limiting resistor (13). A main winding (16) is fixedly installed on the surface of the inverter body (7). One end of the main winding (16) is welded to the collector of the D718 transistor (8). A center tap (15) is fixedly installed on the surface of the inverter body (7). One end of the center tap (15) is welded to the power supply coil of the 12V pentagram relay (9). A connecting wire (17) is welded to the surface of the 12V pentagram relay (9). An input wire (18) is welded to the surface of the power supply interface (2). One end of the input wire (18) is fixedly welded to the inside of the inverter body (7).

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