Heat dissipation device of photovoltaic inverter

Abstract

The utility model discloses a heat dissipation device of a photovoltaic inverter, which comprises an inverter main body, and a first internal device to be subjected to heat dissipation and a heat pipe heat exchanger are accommodated in the inverter main body; the heat pipe heat exchanger comprises a plurality of heat pipes, upper cooling fins, lower cooling fins and a heat exchanger substrate, and the upper cooling fins and the lower cooling fins are arranged on the upper portion and the lower portion of the heat exchanger substrate respectively. The heat pipe heat exchanger and the inverter body are fixed through the heat exchanger substrate, the part where upper cooling fins of the heat pipe heat exchanger are located is arranged in the inverter body, the part where lower cooling fins of the heat pipe heat exchanger are located is arranged outside the inverter body, and the heat pipe heat exchanger and the inverter body are fixed through the heat exchanger substrate. Heat in the inverter is transferred to the external environment, the problem that the temperature of the internal environment of the high-power inverter is too high can be effectively solved, the internal air duct and the external air duct are completely independent and do not restrict each other, the overall size of a case cannot be obviously increased, and IP protection and the anti-corrosion grade can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronic heat dissipation, and in particular to a heat dissipation device for a photovoltaic inverter. Background Art

[0002] The cooling method of the existing high-power inverter usually adopts forced air cooling. The loss of the whole machine mainly comes from the heat of the power tubes on the machine side and the grid side, the inductors on the machine side and the grid side, and the magnetic devices such as the capacitors and inductors inside the chassis. The inductors and power tubes usually use aluminum heat sinks and fans for forced air cooling and heat exchange. The components inside the chassis transfer heat to the surface of the chassis through the turbulence fan, and the chassis transfers the heat of the internal components to the outside of the chassis through natural heat dissipation and thermal radiation. It is difficult to discharge the heat to the external environment only through the turbulence of the internal fan and the natural heat dissipation of the chassis. Especially after the power reaches a certain level, it is necessary to introduce additional devices to reduce the internal temperature of the inverter. The introduction of additional devices will inevitably increase the cost of the inverter. Utility Model Content

[0003] The utility model proposes a heat dissipation device for a photovoltaic inverter. The heat dissipation device for the photovoltaic inverter realizes directional heat transfer through a heat pipe, transfers the heat inside the inverter to the external environment, and can effectively solve the problem of excessively high internal environment temperature of a high-power inverter. The internal air duct and the external air duct are completely independent and have no restriction on each other, and will not increase the overall volume of the chassis, and can realize IP protection and improve the anti-corrosion level.

[0004] In order to solve the above technical problems, the utility model provides a heat dissipation device for a photovoltaic inverter, comprising an inverter body, wherein a first internal heat dissipation device and a heat pipe heat exchanger are accommodated inside the inverter body; the heat pipe heat exchanger comprises a plurality of heat pipes, an upper heat dissipation fin, a lower heat dissipation fin, and a heat exchanger substrate, wherein the plurality of heat pipes penetrate the heat exchanger substrate, the upper heat dissipation fin and the lower heat dissipation fin, and the upper heat dissipation fin and the lower heat dissipation fin are respectively arranged at the upper and lower parts of the heat exchanger substrate; the portion of the heat pipe heat exchanger where the upper heat dissipation fin is located is placed inside the inverter body, and the portion where the lower heat dissipation fin is located is placed outside the inverter body, and the heat pipe heat exchanger and the inverter body are fixed by the heat exchanger substrate.

[0005] Preferably, a first cooling fan is arranged on the left side of the portion where the upper cooling fins of the heat pipe exchanger are located, and a second cooling fan is arranged around the portion where the lower cooling fins outside the photovoltaic inverter are located; the first cooling fan, the heat pipe exchanger and the first internal device to be cooled form a first independent air duct, and the first cooling fan transfers the heat of the first internal device to be cooled to the heat pipe exchanger by exhausting air.

[0006] Preferably, the inverter body also accommodates a second internal heat dissipation device arranged along the first independent air duct and a third cooling fan arranged at the starting end of the second internal heat dissipation device. The third cooling fan, the second internal heat dissipation device and the first independent air duct form a complete internal circulation air duct.

[0007] Preferably, a first cooling fan is arranged on the right side of the portion where the upper cooling fins of the heat pipe exchanger are located, and a second cooling fan is arranged around the portion where the lower cooling fins are located outside the inverter body; the inverter body also accommodates a second internal device to be cooled along the first internal device to be cooled and a third cooling fan arranged at the starting end of the second internal device to be cooled; the third cooling fan, the second internal device to be cooled, the heat pipe exchanger, the first cooling fan, and the first internal device to be cooled form a complete internal circulation air duct, and the first cooling fan causes the internal circulation air duct to perform a heat dissipation cycle by blowing air.

[0008] Preferably, the first heat dissipation fan, the heat pipe heat exchanger and the first internal heat dissipation device form a first independent air duct through air duct plates arranged on the upper and lower end surfaces inside the inverter body.

[0009] Preferably, the first internal components to be cooled include relays and inductors, and the second internal components to be cooled include capacitors, transformers and power modules.

[0010] Preferably, an external heat dissipation duct plate is provided at the lower part of the inverter body, the part where the lower heat dissipation fins of the heat pipe heat exchanger are located is provided on the external heat dissipation duct plate, and an inductor, a radiator and a plurality of external heat dissipation fans are provided on the external heat dissipation duct plate; an inductor mounting hole and a power module mounting hole are provided at the bottom of the inverter body and the corresponding internal duct plate, the inductor is installed at the lower part of the inductor mounting hole, the power module and the radiator are arranged at the upper and lower parts of the power module mounting hole, and an external air outlet is provided on a side wall of the external duct plate opposite to the external heat dissipation fan, and the plurality of external heat dissipation fans, the radiator, the inductor, the lower heat dissipation fins and the external air outlet form an external heat dissipation duct for discharging heat from the inside of the inverter body, the power module and the inductor to the external environment to achieve heat exchange.

[0011] Preferably, a groove for installing a waterproof conductive rubber strip is provided on the surface of the heat exchanger substrate, and a sealant is filled at the connection between the heat pipe and the heat exchanger substrate.

[0012] Preferably, a vertical line where the heat dissipation fin plane is located forms a certain angle θ with the axis where the heat pipe is located.

[0013] Preferably, the portion of the heat pipe heat exchanger disposed outside the inverter body is subjected to anodizing surface treatment, electrophoresis surface treatment, spraying surface treatment or the like.

[0014] After adopting the above device, the heat dissipation device of the photovoltaic inverter includes an inverter body, wherein the first internal heat dissipation device and the heat pipe heat exchanger are accommodated inside the inverter body; the heat pipe heat exchanger includes a plurality of heat pipes, an upper heat dissipation fin, a lower heat dissipation fin, and a heat exchanger substrate, wherein the plurality of heat pipes penetrate the heat exchanger substrate, the upper heat dissipation fin and the lower heat dissipation fin, and the upper heat dissipation fin and the lower heat dissipation fin are respectively arranged at the upper and lower parts of the heat exchanger substrate; the portion where the upper heat dissipation fin of the heat pipe heat exchanger is located is placed inside the inverter body, and the portion where the lower heat dissipation fin is located is placed outside the inverter body, and the heat pipe heat exchanger and the inverter body are fixed by the heat exchanger substrate; the heat dissipation device of the photovoltaic inverter realizes directional transfer of heat through the heat pipe, transfers the heat inside the inverter to the external environment, and can effectively solve the problem of excessively high internal environment temperature of the high-power inverter; the internal air duct and the external air duct are completely independent and have no restriction on each other, and will not increase the overall volume of the chassis, and can realize IP protection and improve the anti-corrosion level. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a bottom view of a heat dissipation device for a photovoltaic inverter according to the utility model;

[0016] Figure 2 This is an overall structural diagram of a heat pipe heat exchanger of a heat dissipation device of a photovoltaic inverter according to the utility model;

[0017] Figure 3 This is a front view of a heat dissipation device for a photovoltaic inverter according to the utility model;

[0018] Figure 4 This is a back view of a heat dissipation device for a photovoltaic inverter according to the utility model;

[0019] Figure 5 This is a front view of another air duct form of a heat dissipation device for a photovoltaic inverter of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] Embodiment 1

[0022] See also Figure 1 to Figure 2 , Figure 1This is a bottom view of a heat dissipation device for a photovoltaic inverter according to the utility model; Figure 2 The utility model discloses a heat dissipation device for a photovoltaic inverter, comprising an inverter body 2, wherein a first internal heat dissipation device 51 and a heat pipe heat exchanger 1 are accommodated inside the inverter body 2; the heat pipe heat exchanger 1 comprises a plurality of heat pipes 11, an upper heat dissipation fin 12, a lower heat dissipation fin 15, and a heat exchanger substrate 13, wherein the plurality of heat pipes 11 penetrate the heat exchanger substrate 13, the upper heat dissipation fin 12 and the lower heat dissipation fin 15, and the upper heat dissipation fin 12 and the lower heat dissipation fin 15 are respectively arranged at the upper and lower parts of the heat exchanger substrate 13; the portion of the heat pipe heat exchanger 1 where the upper heat dissipation fin 12 is located is arranged inside the inverter body 2, and the portion where the lower heat dissipation fin 15 is located is arranged outside the inverter body 2, and the heat pipe heat exchanger 1 and the inverter body 2 are fixed by the heat exchanger substrate 13.

[0023] Embodiment 2

[0024] See also Figure 3 and Figure 4 , Figure 3 This is a front view of a heat dissipation device for a photovoltaic inverter according to the utility model. Figure 4 This is a back view of a heat dissipation device for a photovoltaic inverter according to the utility model;

[0025] This embodiment is based on the first embodiment. In this embodiment, a first cooling fan 31 is arranged on the left side of the upper cooling fin 12 of the heat pipe heat exchanger 1, and a second cooling fan is arranged around the lower cooling fin outside the inverter body 2.

[0026] In this embodiment, the first cooling fan 31, the heat pipe heat exchanger 1 and the first internal heat dissipation device 51 form a first independent air duct, and the first cooling fan 31 transfers the heat of the first internal heat dissipation device 51 to the heat pipe heat exchanger 1 by exhausting air.

[0027] The inverter body 2 also accommodates a second internal heat dissipation device 52 arranged along the first independent air duct and a third cooling fan 32 arranged at the starting end of the second internal heat dissipation device 52. The third cooling fan 32, the second internal heat dissipation device 52 and the first independent air duct form a complete internal circulation air duct.

[0028] Embodiment 3

[0029] See also Figure 5 , Figure 5 This is a front view of another air duct form of a heat dissipation device for a photovoltaic inverter of the utility model;

[0030] This embodiment is based on the first embodiment. In this embodiment, a first cooling fan 31 is arranged on the right side of the portion where the upper cooling fins 12 of the heat pipe heat exchanger 1 are located, and a second cooling fan 4 is arranged around the portion where the lower cooling fins 15 are located outside the inverter body; the inverter body 1 also accommodates a second internal device to be cooled 52 arranged along the first internal device to be cooled 51 and a third cooling fan 32 arranged at the starting end of the second internal device to be cooled 52; the third cooling fan 32, the second internal device to be cooled 52, the heat pipe heat exchanger 1, the first cooling fan 31, and the first internal device to be cooled 51 form a complete internal circulation air duct, and the first cooling fan 31 causes the internal circulation air duct to perform heat dissipation circulation by blowing air.

[0031] Embodiment 4

[0032] This embodiment is based on the second embodiment. In this embodiment,

[0033] The first heat dissipation fan 31 , the heat pipe heat exchanger 1 and the first internal heat dissipation device 51 form a first independent air duct through the internal air duct plate 10 arranged on the upper and lower end surfaces inside the inverter body 2 .

[0034] Embodiment 5

[0035] This embodiment is based on the second embodiment or the third embodiment. In this embodiment, the first internal heat dissipation device 51 includes a relay and an inductor, and the second internal heat dissipation device 52 includes a capacitor, a transformer and a power module 521.

[0036] In this embodiment, an external heat dissipation duct plate 9 is provided at the lower part of the inverter body 2, and the lower heat dissipation fins 15 of the heat pipe heat exchanger 1 are located on the external heat dissipation duct plate 9, and inductors 81, 82, a radiator 7 and a plurality of external heat dissipation fans 3 are provided on the external heat dissipation duct plate 9; an inductor mounting hole and a power module mounting hole are provided at the bottom of the inverter body 2 and the corresponding internal duct plate 10, and the inductors 81, 82 are installed at the lower part of the inductor mounting hole, and the power module 521 and the radiator 7 are arranged at the upper and lower parts of the power module mounting hole; an external air outlet 91 is provided on a side wall of the external duct plate 9 opposite to the external heat dissipation fan 3; a plurality of external heat dissipation fans 3 and the radiator 7, inductors 81, 82, the lower heat dissipation fins 15 and the external air outlet 91 form an external heat dissipation duct for discharging heat from the inside of the inverter body, the power module 521 and the inductors 81, 82 to the external environment to achieve heat exchange.

[0037] Embodiment 6

[0038] This embodiment is based on the first embodiment. In this embodiment, a groove 14 for installing a waterproof conductive rubber strip is provided on the surface of the heat exchanger substrate 13 , and a sealant is filled at the connection between the heat pipe 11 and the heat exchanger substrate 13 .

[0039] The vertical line where the heat dissipation fin plane is located forms a certain angle θ with the axis where the heat pipe 11 is located.

[0040] In this embodiment, the portion of the heat pipe heat exchanger 1 disposed outside the inverter body 2 is subjected to anodizing surface treatment, electrophoresis surface treatment, spraying surface treatment or the like.

[0041] The heat dissipation device of the photovoltaic inverter described in the utility model not only solves the problem of excessively high internal temperature of the high-power cabinet in a relatively small space, but also realizes the high protection level of the cabinet and the application requirements of high humidity and high salt fog; the heat pipe is a heat transfer device with high thermal conductivity, which is hollow inside and its tube wall is composed of a liquid wick composed of a capillary porous material. After the evaporation end is heated, the liquid in the tube wall evaporates and absorbs heat and quickly transfers the heat to the condensation end. After the steam condenses into liquid at the condensation end, it returns to the evaporation end under the action of capillary force. The heat pipe heat exchanger has a flexible processing method and can be customized in different shapes and specifications according to the heat dissipation requirements. By installing, sealing and surface treatment, it can also easily realize the overall protection of the inverter body and improve the anti-corrosion level. The internal and external air ducts are completely independent and have no restrictions on each other, and will not significantly increase the overall volume of the inverter body. Therefore, it is very suitable for the internal heat dissipation requirements of the inverter body of a high-power photovoltaic inverter.

[0042] It should be understood that the above are only preferred embodiments of the present invention, and the patent scope of the present invention cannot be limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heat dissipation device for a photovoltaic inverter, characterized in that: The invention comprises an inverter body, wherein a first internal heat dissipation device and a heat pipe heat exchanger are accommodated inside the inverter body; the heat pipe heat exchanger comprises a plurality of heat pipes, an upper heat dissipation fin, a lower heat dissipation fin, and a heat exchanger substrate; the plurality of heat pipes penetrate the heat exchanger substrate, the upper heat dissipation fin and the lower heat dissipation fin, and the upper heat dissipation fin and the lower heat dissipation fin are respectively arranged at the upper and lower parts of the heat exchanger substrate; the portion where the upper heat dissipation fin of the heat pipe heat exchanger is located is placed inside the inverter body, and the portion where the lower heat dissipation fin is located is placed outside the inverter body, and the heat pipe heat exchanger and the inverter body are fixed by the heat exchanger substrate.

2. The heat dissipation device for a photovoltaic inverter according to claim 1, characterized in that: A first cooling fan is arranged on the left side of the portion where the upper cooling fins of the heat pipe exchanger are located, and a second cooling fan is arranged around the portion where the lower cooling fins outside the photovoltaic inverter are located; the first cooling fan, the heat pipe exchanger and the first internal device to be cooled form a first independent air duct, and the first cooling fan transfers the heat of the first internal device to be cooled to the heat pipe exchanger by exhausting air.

3. The heat dissipation device for a photovoltaic inverter according to claim 2, characterized in that: The inverter body also contains a second internal heat dissipation device arranged along the first independent air duct and a third heat dissipation fan arranged at the starting end of the second internal heat dissipation device. The third heat dissipation fan, the second internal heat dissipation device and the first independent air duct form a complete internal circulation air duct.

4. The heat dissipation device for a photovoltaic inverter according to claim 1, characterized in that: A first cooling fan is arranged on the right side of the portion where the upper cooling fins of the heat pipe heat exchanger are located, and a second cooling fan is arranged around the portion where the lower cooling fins are located outside the inverter body; the inverter body also accommodates a second internal device to be cooled along the first internal device to be cooled and a third cooling fan arranged at the starting end of the second internal device to be cooled; the third cooling fan, the second internal device to be cooled, the heat pipe heat exchanger, the first cooling fan, and the first internal device to be cooled form a complete internal circulation air duct, and the first cooling fan causes the internal circulation air duct to perform heat dissipation circulation by blowing air.

5. The heat dissipation device for a photovoltaic inverter according to claim 2, characterized in that: The first heat dissipation fan, the heat pipe heat exchanger and the first internal heat dissipation device form a first independent air duct through air duct plates arranged on the upper and lower end surfaces inside the inverter body.

6. The heat dissipation device for a photovoltaic inverter according to claim 3 or 4, characterized in that: The first internal components to be cooled include relays and inductors, and the second internal components to be cooled include capacitors, transformers and power modules.

7. The heat dissipation device for a photovoltaic inverter according to claim 6, characterized in that: An external heat dissipation duct plate is arranged at the lower part of the inverter body, and the lower heat dissipation fins of the heat pipe heat exchanger are arranged on the external heat dissipation duct plate. An inductor, a radiator and a plurality of external heat dissipation fans are also arranged on the external heat dissipation duct plate. An inductor mounting hole and a power module mounting hole are provided at the bottom of the inverter body and the corresponding internal duct plate. The inductor is installed at the lower part of the inductor mounting hole, and the power module and the radiator are arranged at the upper and lower parts of the power module mounting hole. An external air outlet is arranged on a side wall of the external duct plate opposite to the external heat dissipation fan. The plurality of external heat dissipation fans, the radiator, the inductor, the lower heat dissipation fins and the external air outlet form an external heat dissipation duct for discharging heat from the inside of the inverter body, the power module and the inductor to the external environment to achieve heat exchange.

8. The heat dissipation device for a photovoltaic inverter according to claim 1, characterized in that: The surface of the heat exchanger substrate is provided with a groove for installing a waterproof conductive rubber strip, and the connection between the heat pipe and the heat exchanger substrate is filled with sealant.

9. The heat dissipation device for a photovoltaic inverter according to claim 1, characterized in that: The vertical line where the heat dissipation fin plane is located forms a certain angle θ with the axis where the heat pipe is located.

10. The heat dissipation device for a photovoltaic inverter according to claim 1, characterized in that: The portion of the heat pipe heat exchanger disposed outside the inverter body is subjected to anodizing surface treatment, electrophoresis surface treatment, spraying surface treatment or the like.

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