CN219678411U - Heat dissipation device for power module in photovoltaic inverter - Google Patents

Abstract

The utility model discloses a heat dissipation device for a power module in a photovoltaic inverter, which comprises an inverter box body, a filter screen and an IGBT module, wherein the IGBT module is arranged on the inner side wall surface of the inverter box body, one side of the inverter box body is provided with an air outlet, a circulating heat dissipation structure is arranged in the inverter box body, and one side of the inverter box body is provided with a filter replacement structure; the utility model belongs to the technical field of photovoltaic inverters, and relates to a heat dissipation device for a power module in a photovoltaic inverter.

Description

A heat dissipation device for power modules in photovoltaic inverters

Technical field

The utility model belongs to the technical field of photovoltaic inverters, and specifically relates to a heat dissipation device used for power modules in photovoltaic inverters.

Background technique

Photovoltaic inverters can convert the variable DC voltage generated by photovoltaic solar panels into AC power at the mains frequency. This inverter can be fed back to the commercial power transmission system or used by off-grid power grids, which is an important factor that restricts its safe operation. One is the heat dissipation problem of the IGBT power module in the inverter. IGBT is a power semiconductor composite component that combines high frequency, high voltage and large current. Its emergence has promoted the great development of power electronics, but the IGBT power module has During the working process, a large amount of heat will be generated, causing the temperature of the IGBT power module to rise rapidly. Excessive temperature will have great harm to the performance of the IGBT power module and even seriously affect its service life. Therefore, it needs to be assisted by other heat dissipation devices. Heat dissipation. Most of the existing heat dissipation devices only rely on internal fans to discharge the internal heat to achieve the heat dissipation effect. However, this heat dissipation method has poor heat dissipation effect. At the same time, the fan will suck dust from the outside air when working. Inside the photovoltaic inverter, replacing the dust filter of the photovoltaic inverter is time-consuming and laborious. If the dust filter is not replaced for a long time, it will affect the dust-proof effect of the dust filter and the heat dissipation effect of the photovoltaic inverter. In order to To solve the above problems existing in the existing technology, we propose a heat dissipation device for power modules in photovoltaic inverters.

Utility model content

In order to solve the above-mentioned problems existing in the prior art, the purpose of this utility model is to provide a heat dissipation device for a power module in a photovoltaic inverter.

The technical solution adopted by this utility model is:

A heat dissipation device for a power module in a photovoltaic inverter, including an inverter box, a filter, and an IGBT module. The IGBT module is installed on the inner wall of the inverter box. The inverter box An air outlet is provided on one side of the body, a circulation heat dissipation structure is provided in the inverter box, a filter replacement structure is provided on one side of the inverter box, and the filter screen is provided on the filter replacement structure. The circulating heat dissipation structure includes a partition, a mounting seat and auxiliary components. The partition is installed on the inner wall of the inverter box. The mounting seat is installed on the partition. The auxiliary component is installed on the On the inner wall of the inverter box, a heat dissipation component is provided on the mounting base.

As a preferred feature of this application, the heat dissipation component includes a liquid storage tank, which is installed on the upper wall of the mounting base. A pump body is provided in the liquid storage tank, and a water-cooling block is installed on the IGBT module. , the inner wall of the inverter box is provided with a heat exchanger, the water outlet end of the pump body is provided with a liquid outlet pipe, one end of the liquid outlet pipe penetrates the side wall of the liquid storage tank and the partition between the The water inlet of the water cooling block is connected, and the water outlet of the water cooling block is provided with a liquid inlet pipe. One end of the liquid inlet pipe is connected to the heat exchanger. An infusion pipe is installed on the heat exchanger, and one end of the infusion pipe runs through The side wall surface of the partition is connected to one end of the water inlet of the liquid storage tank.

Preferably, the auxiliary component includes a fixing bracket and a cooling fan. The fixing bracket is installed on the inner wall of the inverter box, and the cooling fan is installed on the fixing bracket.

As a preferred feature of the present invention, the filter replacement structure includes a mounting frame. The mounting frame is installed on the outer wall of the inverter box. There is a placing frame inside the mounting frame. The placing frame is connected to the mounting frame. Sliding connection, the filter screen is installed on the placement frame, and the mounting frame is provided with a fixing component.

As a preferred embodiment of the present invention, the fixing component includes a threaded rod, which is installed on one side wall of the mounting bracket and one end of the threaded rod penetrates the mounting bracket. One end of the threaded rod is provided with a knob. The other end of the threaded rod is provided with a fixed block.

Preferably, the fixing block is made of wear-resistant rubber material and is located inside the mounting bracket.

As a preferred embodiment of this invention, the liquid storage tank is provided with an observation window, and the observation window is provided with scale marks.

As a preferred feature of the present invention, the heat exchanger is provided with a plurality of curved heat dissipation fins, and the plurality of curved heat dissipation fins are evenly installed on one side wall of the heat exchanger.

The beneficial effects of the utility model are: as a heat dissipation device for the power module in the photovoltaic inverter, the utility model drives the cooling liquid in the liquid storage tank to flow through the pump body in the heat dissipation component in the circulation heat dissipation structure. , the coolant enters the water cooling block on the IGBT module, the coolant takes away the heat on the IGBT module, enters the heat exchanger through the liquid inlet pipe, dissipates the heat on the IGBT module through the heat exchanger, and finally enters the storage In the liquid tank, the cooling fan in the auxiliary component rotates to speed up the heat dissipation of the heat exchanger and improve the heat dissipation effect. The coolant is circulated in this way to dissipate heat to the IGBT module, which solves the problem of low heat dissipation efficiency of relying only on the fan. The filter replacement structure The placement frame is installed on the mounting frame with the filter. The threaded rod in the fixing assembly drives the fixing block to rotate. The fixing block contacts the placement frame and fixes it. The filter can be fixed outside the vent and needs to be replaced. Rotate the screw rod to keep the fixing block away from the placement frame. Take the placement frame out of the installation frame to quickly replace the filter in the photovoltaic inverter.

Description of drawings

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Figure 1 is a schematic three-dimensional axial structural diagram of a heat dissipation device for a power module in a photovoltaic inverter according to the present invention.

Figure 2 is a schematic side structural view of a heat dissipation device used for a power module in a photovoltaic inverter according to the present invention.

Figure 3 is a schematic diagram of the internal structure of an inverter box used as a heat dissipation device for a power module in a photovoltaic inverter according to the present invention.

Figure 4 is a schematic three-dimensional structural diagram of a mounting frame for a heat dissipation device of a power module in a photovoltaic inverter according to the present invention.

Figure 5 is a partially enlarged structural diagram of a heat dissipation device used for a power module in a photovoltaic inverter according to the present invention.

In the picture: 1. Inverter box, 2. IGBT module, 3. Mounting base, 4. Liquid storage tank, 5. Pump body, 6. Partition plate, 7. Liquid outlet pipe, 8. Water cooling block, 9. Liquid inlet pipe, 10. Heat exchanger, 11. Infusion pipe, 12. Fixing frame, 13. Cooling fan, 14. Air outlet, 15. Installation frame, 16. Threaded rod, 17. Placement frame, 18. Filter, 19. Knob, 20. Fixed block, 21. Observation window.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present utility model and are not used to limit the present utility model. That is, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present utility model.

The specific implementation of the present invention will be described below with reference to Figures 1-5. A heat dissipation device for a power module in a photovoltaic inverter includes an inverter box 1, a filter 18 and an IGBT module 2. The IGBT module 2 is installed on the inner wall surface of the inverter box 1. An air outlet 14 is provided on one side of the inverter box 1. A circulation heat dissipation structure is provided inside the inverter box 1. The inverter A filter replacement structure is provided on one side of the box 1. The filter screen 18 is provided on the filter replacement structure. The circulation heat dissipation structure includes a partition 6, a mounting base 3 and auxiliary components. The partition 6 is installed on the filter replacement structure. The inner wall surface of the inverter box 1, the mounting base 3 is installed on the partition 6, the auxiliary components are installed on the inner wall surface of the inverter box 1, the mounting base 3 is provided with a row As for the thermal component, the IGBT module 2 dissipates a lot of heat when working. The heat dissipation component can circulate heat dissipation. The auxiliary component increases the heat dissipation efficiency of the heat dissipation component. The filter replacement structure can be quickly replaced.

Advantageously, the heat dissipation component includes a liquid storage tank 4. The liquid storage tank 4 is installed on the upper wall of the mounting base 3. A pump body 5 is provided in the liquid storage tank 4. The IGBT module 2 is installed with a pump body 5. There is a water cooling block 8, a heat exchanger 10 is provided on the inner wall of the inverter box 1, a liquid outlet pipe 7 is provided at the water outlet of the pump body 5, and one end of the liquid outlet pipe 7 passes through the liquid storage tank 4 One side wall and the partition 6 are connected to the water inlet of the water cooling block 8. The water outlet of the water cooling block 8 is provided with a liquid inlet pipe 9. One end of the liquid inlet pipe 9 is connected to the heat exchanger 10, so An infusion pipe 11 is installed on the heat exchanger 10. One end of the infusion pipe 11 penetrates the side wall of the partition 6 and is connected to one end of the water inlet of the liquid storage tank 4. A cooling medium is provided in the liquid storage tank 4. The cooling medium It is water. The water enters the liquid outlet pipe 7 through the pump body 5 and enters the water inlet of the water cooling block 8 through the liquid outlet pipe 7. The water cooling block 8 is in contact with the IGBT module 2. The water takes away the heat generated by the IGBT module 2 and passes through the liquid inlet pipe. 9 enters the heat exchanger 10. There are micro-channels and multiple lines inside the heat exchanger 10 to carry water through. The water lowers its temperature during the flow process, and finally enters the liquid storage tank 4 through the infusion pipe 11. This cycle is used to dissipate heat, which is relatively simple. Heat dissipation through fans is more efficient.

Advantageously, the auxiliary components include a fixed frame 12 and a cooling fan 13. The fixed frame 12 is installed on the inner wall of the inverter box 1. The cooling fan 13 is installed on the fixed frame 12. The fixed frame 12 is installed on the inner wall of the inverter box 1. The cooling fan 13 on the heat exchanger 12 is started when the heat dissipation component is working, blowing and dissipating heat to the heat exchanger 10, speeding up the heat dissipation effect of the heat exchanger 10, and greatly improving the heat dissipation efficiency of the heat exchanger 10.

Advantageously, the filter replacement structure includes a mounting bracket 15. The mounting bracket 15 is installed on the outer wall of the inverter box 1. A placement bracket 17 is provided inside the mounting bracket 15. The placement bracket 17 is connected with the inverter box 1. The installation frame 15 is slidably connected, and the filter screen 18 is installed on the placement frame 17. The installation frame 15 is provided with a fixing assembly. The placement frame 17 equipped with the filter screen 18 can be slidably installed in the installation frame 15. Fitted with the air outlet 14 on one side of the inverter box 1, the filter screen 18 can be used for filtering. The placement frame 17 can be fixed through the fixing assembly, and the filter screen 18 can then be fixed.

Advantageously, the fixing assembly includes a threaded rod 16, which is installed on one side wall of the mounting bracket 15 and one end of the threaded rod 16 penetrates the mounting bracket 15, and a knob is provided on one end of the threaded rod 16. 19. There is a fixed block 20 at the other end of the threaded rod 16. Turn the knob 19. The knob 19 drives the threaded rod 16 to rotate on the mounting frame 15. The fixed block 20 rotates following the threaded rod 16 until the fixed block 20 is in contact with the placement frame. 17 one side wall surface contacts and fixes the placing frame 17 in the mounting frame 15 .

Advantageously, the fixing block 20 is made of wear-resistant rubber material and is located inside the mounting frame 15. The fixing block 20 made of wear-resistant rubber material has a long service life, good fixing effect, and will not interfere with the placement frame. 17 will cause damage to the placement frame 17 when in contact. When the fixing block 20 is inside the installation frame 15, it is convenient to fix the placement frame 17.

Advantageously, the liquid storage tank 4 is provided with an observation window 21, and the observation window 21 is provided with a scale mark. The observation window 21 is convenient for observing the storage amount of the cooling medium in the liquid storage tank 4. The scale on the observation window 21 is The line provides a visual indication of the remaining storage capacity.

Advantageously, the heat exchanger 10 is provided with a plurality of curved heat dissipation fins, and the plurality of curved heat dissipation fins are evenly installed on one side wall of the heat exchanger 10. The curved heat dissipation fins can be used with larger heat dissipation fins. Heat dissipation area, when water passes through the heat exchanger 10, the heat generated by the IGBT module 2 in the water will be dissipated through a number of curved heat dissipation fins on the heat exchanger 10.

Working principle of this utility model:

First, add the cooling medium water into the liquid storage tank 4. When the IGBT module 2 in the inverter box 1 needs to dissipate heat, start the pump body 5 in the liquid storage tank 4. The pump body 5 drives the water to enter through the liquid outlet pipe 7. In the water-cooling block 8 on the IGBT module 2, there is a water channel inside the water-cooling block 8. When the water enters the water channel, it can take away the heat generated by the IGBT module 2 and enter the heat exchanger 10 through the liquid inlet pipe 9. The water in the heat exchanger 10 is also A number of micro water channels are provided, and the water with heat in the liquid inlet pipe 9 is dissipated through a number of curved cooling fins on the heat exchanger 10. The cooling fan 13 on the fixed frame 12 is started to work, and the cooling fan 13 exchanges heat. The inverter 10 blows and dissipates heat, and the air passes through the air outlet 14 on the inverter box 1 and then enters the liquid storage tank 4 through the infusion pipe 11. The IGBT module 2 is dissipated through water circulation, which improves the heat dissipation efficiency and installs the filter. The placement frame 17 of the screen 18 is installed into the installation frame 15, and the threaded rod 16 is rotated. The threaded rod 16 drives the fixing block 20 to move, thereby contacting and fixing the placement frame 17. When the filter 18 needs to be replaced, turn the knob 19 so that the fixing block 20 away from the placement frame 17, take the placement frame 17 out of the installation frame 15, and quickly replace the filter screen 18. After the replacement, place the placement frame 17 into the installation frame 15 and fix it through the fixing block 20.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection", "connection", etc. should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The above contents are only examples and descriptions of the structure of the present utility model. Those skilled in the art may make various modifications or supplements to the described specific embodiments or substitute them in similar ways, as long as they do not deviate from the principles of the utility model. Structure or beyond the scope defined in the claims shall fall within the protection scope of the present utility model.

Claims (8)

1. A heat dissipation device for a power module in a photovoltaic inverter, characterized in that it includes an inverter box, a filter screen and an IGBT module, and the IGBT module is installed on the inner wall of the inverter box, The inverter box is provided with an air outlet on one side, a circulation heat dissipation structure is provided in the inverter box, a filter replacement structure is provided on one side of the inverter box, and the filter is provided on the On the filter replacement structure, the circulation heat dissipation structure includes a partition, a mounting base and auxiliary components. The partition is installed on the inner wall of the inverter box, and the mounting base is installed on the partition. The auxiliary component is installed on the inner wall of the inverter box, and a heat dissipation component is provided on the mounting base. 2. A heat dissipation device for a power module in a photovoltaic inverter according to claim 1, characterized in that: the heat dissipation component includes a liquid storage tank, and the liquid storage tank is installed on the mounting base. On the wall, a pump body is provided in the liquid storage tank, a water cooling block is installed on the IGBT module, a heat exchanger is provided on the inner wall of the inverter box, and a liquid outlet pipe is provided at the water outlet end of the pump body. One end of the liquid outlet pipe penetrates one side wall of the liquid storage tank and the partition is connected to the water inlet of the water cooling block. The water outlet of the water cooling block is provided with a liquid inlet pipe. One end of the liquid inlet pipe is connected to the water inlet of the water cooling block. The heat exchanger is connected, and an infusion pipe is installed on the heat exchanger. One end of the infusion pipe penetrates the side wall of the partition and is connected to one end of the water inlet of the liquid storage tank. 3. A heat dissipation device for a power module in a photovoltaic inverter according to claim 1, characterized in that: the auxiliary component includes a fixing frame and a cooling fan, and the fixing frame is installed on the inverter. On the inner wall of the box, the cooling fan is installed on the fixed frame. 4. A heat dissipation device for power modules in photovoltaic inverters according to claim 1, characterized in that: the filter replacement structure includes a mounting bracket, and the mounting bracket is installed on the inverter box. On the outer wall surface, a placement frame is provided in the installation frame. The placement frame is slidingly connected to the installation frame. The filter screen is installed on the placement frame, and a fixing assembly is provided on the installation frame. 5. A heat dissipation device for a power module in a photovoltaic inverter according to claim 4, characterized in that: the fixing component includes a threaded rod, and the threaded rod is installed on one side wall of the mounting bracket. One end of the threaded rod penetrates the mounting frame, a knob is provided on one end of the threaded rod, and a fixing block is provided on the other end of the threaded rod. 6. A heat dissipation device for a power module in a photovoltaic inverter according to claim 5, characterized in that: the fixing block is made of wear-resistant rubber material, and the fixing block is located inside the mounting frame. 7. A heat dissipation device for a power module in a photovoltaic inverter according to claim 2, characterized in that: the liquid storage tank is provided with an observation window, and the observation window is provided with a scale mark. 8. A heat dissipation device for a power module in a photovoltaic inverter according to claim 2, characterized in that: the heat exchanger is provided with a plurality of curved heat dissipation fins, and the plurality of curved heat dissipation fins are evenly spaced. Installed on one side wall of the heat exchanger.