Photovoltaic inverter heat dissipation device

Abstract

The utility model discloses a heat dissipation device of a photovoltaic inverter. After being used for a long time, a filter screen is contaminated by much dust, the ventilation effect is affected, a waterproof breathable film may be damaged, and the waterproof breathable film and the filter screen are inconvenient to replace. The cabinet comprises a cabinet body (1), the side face of the cabinet body is fixedly provided with an air inlet assembly, the air inlet assembly comprises a rotating disc (6) and a circular track (2), the circular track is fixed in the cabinet body, the rotating disc is located in the circular track, the rotating disc is provided with four circular through holes which are distributed in a circumferential mode, and the circular through holes are communicated with the cabinet body. An air filter (5) is inserted in each circular through hole, a fan (4) is fixed at the position of the upper opening of the cabinet body, and the fan is in butt joint with one of the air filters. The photovoltaic inverter heat dissipation device is used for heat dissipation of a photovoltaic inverter.

Description

Technical Field

[0001] The utility model relates to a heat dissipation device for a photovoltaic inverter. Background Art

[0002] An inverter is an electric power regulating device composed of semiconductor devices, which is mainly used to convert DC power into AC power. It is generally composed of a boost circuit and an inverter bridge circuit. The boost circuit boosts the DC voltage of the solar cell to the DC voltage required for the inverter output control. The heat dissipation of the inverter is achieved by installing a cooling fan at the inlet of the cabinet.

[0003] The Chinese patent with application number 202121025506.X discloses a boost cooling fan for a photovoltaic inverter, comprising an outer sleeve, an inner sleeve installed between the inner walls of the outer sleeve through a buffer mechanism, a motor installed between the inner walls of the inner sleeve through a first mounting frame, a first fan blade fixedly installed on the output shaft of the motor, a fairing installed on the lower surface of the inner sleeve through a first fixing mechanism, a filter is provided between the inner walls of the fairing near the lower side, a cooling fin is evenly embedded in the circumferential direction on the inner wall of the fairing above the filter, and a waterproof and breathable membrane is fixedly installed between the inner walls of the fairing on the upper side of the cooling fin.

[0004] The above scheme can increase the dustproof and waterproof effect of the cooling fan and prevent dust and water vapor from entering. However, after long-term use, the filter will be contaminated with more dust, affecting the ventilation effect, and the waterproof breathable membrane may also be damaged, making it inconvenient to replace the waterproof breathable membrane and the filter. Utility Model Content

[0005] The utility model is to solve the above-mentioned technical problems and provide a photovoltaic inverter heat dissipation device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A photovoltaic inverter heat dissipation device comprises: a cabinet, an air inlet assembly is fixed on the side of the cabinet, the air inlet assembly comprises a turntable and a circular track, the circular track is fixed in the cabinet, the turntable is located in the circular track, four circular through holes arranged in a circle are provided on the turntable, an air filter is inserted in each of the circular through holes, a fan is fixed at the opening on the cabinet, and the fan is connected to one of the air filters.

[0008] The photovoltaic inverter heat dissipation device, the air filter comprises an upper cylinder, a middle cylinder and a lower cylinder, a waterproof and breathable membrane is sandwiched between the upper cylinder and the middle cylinder, a filter screen is sandwiched between the middle cylinder and the lower cylinder, and the lower cylinder, the middle cylinder and the upper cylinder are fixed by screws;

[0009] Each of the circular through holes is provided with four arc slots in the circumferential direction, and the outer ring surface of the upper cylinder is fixed with four inserting blocks, which are inserted into the arc slots.

[0010] In the photovoltaic inverter heat dissipation device, a rubber pad is fixed on the lower cylinder.

[0011] In the photovoltaic inverter heat dissipation device, a handle is fixed at the center of the turntable. Beneficial Effects

[0012] 1. The utility model sets a turntable so that the turntables at different positions correspond to the fan positions. When the filter screen of the air filter has too much dust or the waterproof breathable membrane is damaged, the turntable can be rotated to make another air filter correspond to the fan position. The used air filter can be disassembled without affecting the heat dissipation effect of the inverter and is convenient for disassembly.

[0013] 2. The utility model can ensure that when the air filter has a poor air intake effect, the operator can promptly rotate the turntable to replace the new air filter to ensure the heat dissipation effect of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 It is the front view of the utility model;

[0015] Attached Figure 2 It is a right view of the utility model;

[0016] Attached Figure 3 It is a left view of the utility model;

[0017] Attached Figure 4 Yes Figure 2 AA section view;

[0018] Attached Figure 5 is a side view of the air filter;

[0019] Attached Figure 6 It is a schematic diagram of the internal structure of the air filter;

[0020] In the figure: 1. cabinet; 2. circular track; 3. opening; 4. fan; 5. air filter; 6. turntable; 7. arc slot; 8. plug-in block; 9. handle; 10. positioning hole; 11. positioning bolt; 51. lower cylinder; 52. middle cylinder; 53. upper cylinder; 54. waterproof breathable membrane; 55. rubber pad; 56. screw; 57. filter. DETAILED DESCRIPTION

[0021] Reference Figure 1-Figure 5A photovoltaic inverter heat dissipation device comprises: a cabinet 1, an air inlet assembly is fixed on the side of the cabinet, and the external wind enters the inverter through the air inlet assembly to dissipate heat from the inverter, the air inlet assembly comprises a turntable 6 and a circular track 2, the circular track is fixed in the cabinet, the turntable is located in the circular track, the turntable can rotate, four circular through holes arranged in a circle are provided on the turntable, and an air filter 5 is inserted in each of the circular through holes, a fan 4 is fixed at the opening on the cabinet, and the fan is connected to one of the air filters.

[0022] The air filter comprises an upper cylinder 53, a middle cylinder 52 and a lower cylinder 51, a waterproof and breathable membrane 54 is sandwiched between the upper cylinder and the middle cylinder, a filter screen 57 is sandwiched between the middle cylinder and the lower cylinder, and the lower cylinder, the middle cylinder and the upper cylinder are fixed by screws 56;

[0023] Each of the circular through holes is provided with four arc slots 7 in the circumferential direction, and the outer ring surface of the upper cylinder is fixed with four inserting blocks 8, which are inserted into the arc slots.

[0024] In the photovoltaic inverter heat dissipation device, a rubber pad 55 is fixed on the lower cylinder.

[0025] In the photovoltaic inverter heat dissipation device, a handle 9 is fixed at the center of the turntable.

[0026] Working principle: When in use, insert the air filter into the circular through hole, insert the plug into the arc slot and rotate it clockwise to install the air filter, which can prevent the air filter from falling. Place one of the air filters in the corresponding position of the fan, and the rubber pad can seal the air filter and the fan. After adjusting the position, the positioning bolt 11 can be threadedly connected with the positioning hole on the disc. At this time, the installation of the device is completed. There are four positioning holes on the turntable. The four positioning holes are arranged in a circle and one is arranged every 90 degrees. There is also a threaded hole on the circular turntable, and a positioning bolt is threaded on it. After adjusting the position of the turntable, screw the positioning bolt into the positioning hole to fix the position of the turntable. At the same time, this positioning hole can also be used to The rotation position of the turntable is limited, and the four positioning holes correspond to the positions of the four air filters. After the outside wind enters through the action of the fan, it passes through the filter to filter the dust, passes through the waterproof breathable membrane to filter the water, and then enters the inverter for heat dissipation. When replacement is needed, you only need to unscrew the positioning bolts, hold the turntable and rotate it 90 degrees to make the other air filter correspond to the fan position, and then screw on the positioning bolts. The turntable can be rotated once at regular intervals. After the third rotation, replace the filter nets and waterproof breathable membranes of the other three used air filters. When replacing, hold the air filter and rotate it counterclockwise, then pull out the air filter, remove the four screws after pulling it out, and then press on the new filter net and waterproof breathable membrane again.

Claims

1. A photovoltaic inverter heat dissipation device, comprising: The cabinet is characterized in that: an air inlet assembly is fixed on the side of the cabinet, the air inlet assembly includes a turntable and a circular track, the circular track is fixed in the cabinet, the turntable is located in the circular track, four circular through holes arranged in a circle are provided on the turntable, an air filter is inserted in each of the circular through holes, a fan is fixed at the opening on the cabinet, and the fan is connected to one of the air filters.

2. A photovoltaic inverter heat dissipation device according to claim 1, characterized in that: The air filter comprises an upper cylinder, a middle cylinder and a lower cylinder, a waterproof and breathable membrane is sandwiched between the upper cylinder and the middle cylinder, a filter screen is sandwiched between the middle cylinder and the lower cylinder, and the lower cylinder, the middle cylinder and the upper cylinder are fixed by screws; Each of the circular through holes is provided with four arc slots in the circumferential direction, and the outer ring surface of the upper cylinder is fixed with four inserting blocks, which are inserted into the arc slots.

3. A photovoltaic inverter heat dissipation device according to claim 2, characterized in that: A rubber pad is fixed on the lower cylinder.

4. A photovoltaic inverter heat dissipation device according to claim 3, characterized in that: A handle is fixed at the center of the turntable.

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