Photovoltaic inverter with double-channel air-cooling heat dissipation structure

Abstract

The application discloses a photovoltaic inverter with a double-channel air cooling heat dissipation structure, which comprises an upper shell, a lower shell, a filter, a fan and a circuit board, the circuit board is fixedly connected to the inner wall of the upper shell, the lower shell is covered on the lower part of the upper shell, the filter and the fan are arranged at two ends of the upper shell to form a rectangular structure, and a plurality of fins are connected to the outer surface of the upper shell; a plurality of power devices and a plurality of capacitors are connected to the circuit board, a partition plate is arranged between the power devices and the capacitors, one end of the partition plate extends to the filter, and the other end of the partition plate extends to the fan; the partition plate separates the power devices from the capacitors to form a high-temperature air duct and a low-temperature air duct; the capacitors are in the low-temperature air duct, have a lower temperature and a longer service life; only lower air flow needs to be introduced into the low-temperature air duct; the power devices are in the high-temperature air duct, higher air flow is introduced into the high-temperature air duct, and the power devices have a better cooling effect; and the highest temperature of the power devices is reduced.

Description

Technical Field

[0001] This invention relates to a photovoltaic inverter with a dual-channel air-cooled heat dissipation structure, belonging to the field of photovoltaic inverter technology. Background Technology

[0002] Photovoltaic inverters are used to convert direct current (DC) generated by photovoltaic panels into alternating current (AC). They generate AC by alternately switching several power devices on and off, while simultaneously using a circuit composed of capacitors and inductors to filter harmonics. During this process, the power devices generate more heat than the capacitors. If power devices and capacitors are placed adjacent to each other, the high temperature generated by the power devices will reduce the lifespan of the capacitors. Therefore, how to cool the power devices without affecting the lifespan of the capacitors is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the present invention aims to provide a photovoltaic inverter with a dual-channel air-cooled heat dissipation structure, replacing the heat dissipation structure in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this invention is as follows: a photovoltaic inverter with a dual-channel air-cooled heat dissipation structure, comprising an upper shell, a lower shell, a filter, a fan, and a circuit board. The circuit board is fixedly connected to the inner wall of the upper shell, and the lower shell covers the lower part of the upper shell. The filter and the fan are respectively arranged at both ends of the upper shell to form a rectangular structure, and several fins are connected to the outer surface of the upper shell. Several power devices and several capacitors are connected on the circuit board, and a partition plate is provided between the power devices and the capacitors. One end of the partition plate extends to the filter, and the other end extends to the fan. The partition plate isolates the power devices from the capacitors, forming a high-temperature air duct and a low-temperature air duct.

[0005] The present invention is further configured such that: the middle part of the partition plate is bent to form a plurality of curved portions, and a plurality of slots are provided on the side of the upper shell, wherein a second insert plate and a power device are inserted into the slots, the end of the power device extends into the curved portion through the high temperature air duct, and the end of the second insert plate extends into the space between adjacent curved portions through the low temperature air duct.

[0006] The invention is further configured such that: a layer of cotton cloth is laid on the lower shell, and several cotton thread clusters are connected to the cotton cloth layer; several through holes are provided in the lower shell, and the cotton thread clusters extend downward through the lower shell; a bottom box is connected to the lower part of the lower shell, and water is present in the lower part of the bottom box, with the ends of the cotton thread clusters extending into the water.

[0007] A further configuration of the present invention is that the first insert plate and the second insert plate are disposed between the circuit board and the cotton cloth layer.

[0008] The invention is further configured such that: the second insert plate is interference-fitted with the slot, and a handle is connected to the end of the second insert plate, with both ends of the handle extending to the upper and lower sides of the second insert plate.

[0009] Compared with existing technologies, the beneficial effects of this invention are as follows: By setting a separator between the power device and the capacitor, with one end of the separator extending to the filter and the other end extending to the fan, the separator isolates the power device and the capacitor, forming a high-temperature air duct and a low-temperature air duct. The capacitor operates at a lower temperature and has a longer lifespan in the low-temperature air duct. Only a lower airflow is required in the low-temperature air duct. The power device operates in the high-temperature air duct, where a higher airflow is supplied, resulting in better cooling. This reduces the maximum temperature of the power device. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a photovoltaic inverter with a dual-channel air-cooled heat dissipation structure, as shown in a preferred embodiment of the present invention.

[0011] Figure 2 for Figure 1 A schematic diagram of a photovoltaic inverter with a dual-channel air-cooling structure.

[0012] Figure 3 for Figure 1 A schematic diagram of a photovoltaic inverter with a dual-channel air-cooled heat dissipation structure.

[0013] In the diagram: 1. Upper shell; 2. Lower shell; 3. Filter; 4. Fan; 5. Fins; 6. Circuit board; 7. Cotton cloth layer; 8. Cotton thread bundle; 9. Base box; 10. Water; 11. Divider plate; 12. First insert plate; 13. Second insert plate; 14. Power device; 15. Capacitor; 16. Slot; 17. Handle. Detailed Implementation

[0014] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0015] See Figure 1-3As shown, a photovoltaic inverter with a dual-channel air-cooled heat dissipation structure in this embodiment includes an upper shell 1, a lower shell 2, a filter 3, a fan 4, and a circuit board 6. The circuit board 6 is fixedly connected to the inner wall of the upper shell 1, and the lower shell 2 covers the lower part of the upper shell 1. The filter 3 and the fan 4 are respectively arranged at both ends of the upper shell 1 to form a rectangular structure, and several fins 5 are connected to the outer surface of the upper shell 1. Several power devices 14 and several capacitors 15 are connected to the circuit board 6. A partition plate 11 is provided between the power devices 14 and the capacitors 15. One end of the partition plate 11 extends to the filter 3, and the other end extends to the fan 4. The partition plate 11 isolates the power devices 14 and the capacitors 15, forming a high-temperature air duct and a low-temperature air duct.

[0016] A partition plate 11 is provided between the power device 14 and the capacitor 15. One end of the partition plate 11 extends to the filter 3, and the other end extends to the fan 4. The partition plate 11 isolates the power device 14 and the capacitor 15, forming a high-temperature air duct and a low-temperature air duct. The capacitor 15 is in the low-temperature air duct, where the temperature is lower, resulting in a longer lifespan. The airflow in both the high-temperature and low-temperature air ducts is the total airflow generated by the fan 4. Since the total airflow is constant, only a lower airflow is needed in the low-temperature air duct. The power device 14 is in the high-temperature air duct, where a higher airflow can be supplied, resulting in better cooling of the power device 14. This reduces the maximum temperature of the power device 14.

[0017] The partition plate 11 is bent in the middle to form several curved sections. Several slots 16 are provided on the side of the upper shell 1. A second insert plate 13 and a power device 14 are inserted into the slots 16. The end of the power device 14 extends through the high-temperature air duct into the curved section, and the end of the second insert plate 13 extends through the low-temperature air duct between adjacent curved sections. The first insert plate 12 guides airflow through the curved sections to cool the power device 14, and changes the airflow from a laminar flow to a turbulent flow, resulting in faster cooling and better cooling effect. By changing the distance between the end of the second insert plate 13 and the partition plate 11, the airflow in the low-temperature channel can be changed. Since the total airflow is constant, the airflow in the high-temperature air duct is indirectly changed. A layer of cotton cloth 7 is laid on the lower shell 2, and several cotton thread bundles 8 are connected to the cotton cloth layer 7. Several through holes are provided in the lower shell 2, and the cotton thread bundles 8 extend downward through the lower shell 2. A bottom box 9 is connected to the lower part of the lower shell 2, and water 10 is located at the bottom of the bottom box 9. A water inlet (not shown) is provided on the side of the bottom box 9, and the ends of the cotton thread bundles 8 extend into the water 10. A small amount of water 10 enters the cotton cloth layer 7 through the cotton thread bundles 8. The water 10 evaporates and absorbs heat, lowering the temperature of the air. The air cools the power device 14, further improving the cooling effect of the power device 14. The first insertion plate 12 and the second insertion plate 13 are disposed between the circuit board 6 and the cotton cloth layer 7. The second insertion plate 13 is interference-fitted with the slot 16, and a handle 17 is connected to the end of the second insertion plate 13. The two ends of the handle 17 extend to the upper and lower sides of the second insertion plate 13.

[0018] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A photovoltaic inverter with a dual-channel air-cooled heat dissipation structure, comprising an upper shell (1), a lower shell (2), a filter (3), a fan (4), and a circuit board (6), wherein the circuit board (6) is fixedly connected to the inner wall of the upper shell (1), the lower shell (2) covers the lower part of the upper shell (1), the filter (3) and the fan (4) are respectively arranged at both ends of the upper shell (1) to form a rectangular structure, and a plurality of fins (5) are connected to the outer surface of the upper shell (1); characterized in that, The circuit board (6) is connected to several power devices (14) and several capacitors (15). A partition plate (11) is provided between the power devices (14) and the capacitors (15). One end of the partition plate (11) extends to the filter (3) and the other end extends to the fan (4). The partition plate (11) isolates the power devices (14) and the capacitors (15) to form a high-temperature air duct and a low-temperature air duct.

2. The photovoltaic inverter with a dual-channel air-cooled heat dissipation structure according to claim 1, characterized in that, The middle part of the partition plate (11) is bent to form several curved parts. Several slots (16) are provided on the side of the upper shell (1). A second insert plate (13) and a power device (14) are inserted into the slots (16). The end of the power device (14) extends into the curved part through the high temperature air duct. The end of the second insert plate (13) extends into the space between adjacent curved parts through the low temperature air duct.

3. The photovoltaic inverter with a dual-channel air-cooled heat dissipation structure according to claim 1, characterized in that, A layer of cotton cloth (7) is laid on the lower shell (2), and several cotton thread clusters (8) are connected to the cotton cloth layer (7). Several through holes are provided in the lower shell (2), and the cotton thread clusters (8) extend downward through the lower shell (2). A bottom box (9) is connected to the lower part of the lower shell (2), and water (10) is in the lower part of the bottom box (9). The ends of the cotton thread clusters (8) extend into the water (10).

4. The photovoltaic inverter with a dual-channel air-cooled heat dissipation structure according to claim 1, characterized in that, The first insert plate (12) and the second insert plate (13) are disposed between the circuit board (6) and the cotton cloth layer (7).

5. The photovoltaic inverter with a dual-channel air-cooled heat dissipation structure according to claim 1, characterized in that, The second insert plate (13) is press-fitted with the slot (16), and a handle (17) is connected to the end of the second insert plate (13). The two ends of the handle (17) extend to the upper and lower sides of the second insert plate (13).

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