Wind power frequency converter power module absorbs capacitor heat dissipation device

Abstract

The application discloses a wind power generation frequency converter power module absorption capacitor heat dissipation device, which comprises heat dissipation fins, a heat conduction mechanism arranged in the middle of the heat dissipation fins for heat conduction, a mounting mechanism arranged on the front surface of the heat dissipation fins, and a connecting mechanism arranged on the back surface of the heat dissipation fan. When the back surface of the heat dissipation fins is attached to the upper surface of the absorption capacitor, the heat dissipation fins are extruded, the mounting block is driven to slide on the heat dissipation fins, the compression spring is compressed, the heat dissipation fins and the absorption capacitor are attached to each other by the elastic effect of the compression spring, the hot air at the position of the absorption capacitor is flowed into the inner cavity of the through hole two from the through hole one and the through hole three by the operation of the heat dissipation fan, the heat of the absorption capacitor is absorbed and conducted, the air in the inner cavity of the through hole two and the air at the position of the heat dissipation fins are extracted by the heat dissipation fan, and the absorption capacitor is rapidly cooled.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation devices for power module absorption capacitors, and particularly to a heat dissipation device for power module absorption capacitors in a wind power inverter. Background Technology

[0002] Inverters are an essential component in wind turbine generator sets. Existing inverters consist of a main circuit system, a power distribution system, and a control system, which includes a power cabinet that is mainly responsible for the transfer of rotor slip energy. The power cabinet mainly consists of power modules, IGBTs, PLCs, JCE1005-FS current sensors, wind turbines, active Crowbars, etc.

[0003] In a power cabinet, power modules are usually arranged in a row. Each power module has an absorption capacitor installed on the side wall of the voltage equalization resistor. During the operation of the power module, the absorption capacitor generates high temperature due to charging and discharging, which requires ventilation and heat dissipation. A common method is to install a heat dissipation duct on the back of the power module to dissipate the heat at the location of the absorption capacitor. However, the heat dissipation duct mainly relies on the flow of air to conduct and dissipate the heat generated by the absorption capacitor, which is not conducive to the rapid heat dissipation of the absorption capacitor and affects its normal operation. Summary of the Invention

[0004] The purpose of this invention is to provide a heat dissipation device for the absorption capacitor of a wind power inverter power module, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a heat dissipation device for the absorption capacitor of a wind power inverter power module, comprising heat dissipation fins, wherein a heat conduction mechanism for heat conduction is provided in the middle, the heat conduction mechanism comprising a heat dissipation plate and a heat dissipation fan, the heat dissipation plate being disposed on the back side of the heat dissipation fins, and the heat dissipation fan being disposed on the front side of the heat dissipation fins;

[0006] The mounting mechanism is located on the front of the heat sink, and the connecting mechanism is located on the back of the cooling fan.

[0007] Preferably, the mounting mechanism includes multiple mounting blocks, the back sides of the multiple mounting blocks are fixedly connected to the front side of the heat sink at equal distances, and multiple mounting grooves are equally spaced on the back sides of the heat sink fins, the inner cavity of the mounting grooves is slidably inserted into the mounting blocks.

[0008] Preferably, the heat sink plate has a plurality of through holes I evenly spaced at equal intervals, the mounting block has a plurality of through holes II evenly spaced at equal intervals, the positions of the through holes II and the through holes I are corresponding, and the top of the mounting block has a plurality of through holes III evenly spaced at equal intervals, the through holes III being connected to the inner cavity of the through holes II.

[0009] Preferably, sleeves are fixedly connected to the top and bottom of the front of the two mounting blocks, and a compression spring is provided in the inner cavity of the sleeve. One end of the compression spring is fixedly connected to the front of the mounting block, and the other end of the compression spring is in contact with the back of the cooling fan.

[0010] Preferably, the connecting mechanism includes multiple fixing rods, one end of which is fixedly connected to the corner of the back of the cooling fan, and the other end of which has a threaded hole in the middle. Grooves are provided on both sides of the back of the cooling fins, and the back of the inner wall of the groove is in contact with the other end of the fixing rod.

[0011] Preferably, the back of the heat dissipation fins is provided with a plurality of mounting holes in a rectangular array at equal intervals, and a bolt is slidably inserted into the inner cavity of the mounting hole, with one end of the bolt threadedly inserted into the inner cavity of the threaded hole.

[0012] Preferably, the outer wall of the mounting block fits into the inner wall of the mounting groove, and a limit block is fixedly connected to both the upper and lower surfaces of one end of the mounting block.

[0013] Preferably, mounting rods are fixedly connected to both sides of the back of the heat dissipation fins, and a threaded hole is provided in the middle of one end of the mounting rod.

[0014] The technical effects and advantages of this invention are as follows:

[0015] (1) The present invention utilizes a combination of a heat sink, a mounting block, a cooling fan, a compression spring, a through hole one, a through hole two, and a through hole three. When the back of the heat sink is in contact with the upper surface of the absorption capacitor, the heat sink is squeezed, causing the heat sink to slide on the heat sink fins, compressing the compression spring. The elasticity of the compression spring keeps the heat sink and the absorption capacitor in contact. The operation of the cooling fan causes hot air at the location of the absorption capacitor to flow into the inner cavity of the through hole two through the through holes one and three, absorbing and conducting the heat of the absorption capacitor. The cooling fan draws air from the inner cavity of the through hole two and the air at the location of the heat sink fins, rapidly dissipating heat from the absorption capacitor.

[0016] (2) The present invention utilizes a combination of a fixing rod, a threaded hole and a bolt. By attaching the back of the cooling fan to the front of the heat dissipation fins, the threaded hole on the fixing rod corresponds to the position of the mounting hole. One end of the bolt passes through the inner cavity of the mounting hole, and the bolt is rotated so that one end is threadedly connected to the inner wall of the threaded hole, thereby fixing the cooling fan and the heat dissipation fins, which facilitates the cooling fan to dissipate heat from the absorption capacitor.

[0017] (3) The present invention utilizes a combination of heat sink, mounting block and heat sink fins. The heat sink and heat sink fins are connected by mounting block. The heat sink absorbs the heat on the absorption capacitor. Multiple mounting blocks conduct the heat on the heat sink to the heat sink fins, which facilitates the dissipation of heat at the location of the absorption capacitor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a top view of the heat dissipation fins of the present invention.

[0020] Figure 3 This is a schematic diagram of the front structure of the heat dissipation fins of the present invention.

[0021] Figure 4 For the present invention Figure 1 A magnified structural diagram at point A.

[0022] Figure 5 This is a schematic diagram of the rear structure of the cooling fan of the present invention.

[0023] In the diagram: 1. Heat dissipation fins; 2. Heat conduction mechanism; 21. Heat dissipation plate; 22. Heat dissipation fan; 3. Mounting mechanism; 31. Mounting block; 32. Through hole one; 33. Through hole two; 34. Through hole three; 35. Sleeve; 36. Compression spring; 4. Connecting mechanism; 41. Fixing rod; 42. Threaded hole one; 43. Mounting hole; 44. Bolt; 5. Limiting block; 6. Mounting rod; 7. Threaded hole two. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This invention provides, for example Figure 1-5The diagram shows a heat dissipation device for the absorption capacitor of a wind power inverter power module. It includes heat dissipation fins 1, made of aluminum, used to absorb and conduct heat from the absorption capacitor, facilitating rapid heat dissipation. A heat conduction mechanism 2 is provided in the middle for heat conduction. This mechanism conducts heat from the absorption capacitor and heat dissipation fins 1 to the outside, reducing the temperature at the absorption capacitor location. The heat conduction mechanism 2 includes a heat dissipation plate 21 and a heat dissipation fan 22. The heat dissipation plate 21 is located on the back of the heat dissipation fins 1 and is made of aluminum. The back of the heat dissipation plate 21 contacts the upper surface of the absorption capacitor, absorbing and conducting heat from the absorption capacitor, facilitating heat dissipation. The heat dissipation fan 22 is located on the front of the heat dissipation fins 1 and is electrically connected to an external power supply via an external switch. The operation of the heat dissipation fan 22 causes airflow from the back to the front, expelling hot air from the back of the heat dissipation fins 1.

[0026] Mounting mechanism 3 is located on the front of heat sink 21. Mounting mechanism 3 is used to install heat sink 21 and heat sink fin 1 to ensure stable contact between heat sink 21 and absorption capacitor and good heat dissipation effect. Connecting mechanism 4 is located on the back of cooling fan 22. Connecting mechanism 4 is used to connect cooling fan 22 and heat sink fin 1.

[0027] The mounting mechanism 3 includes multiple mounting blocks 31, which are made of aluminum and are positioned between two adjacent fins of the heat sink 1. They move together with the heat sink 21 to direct the heat from the heat sink 21 to the heat sink fins 1, facilitating the dissipation of heat from the capacitor. The back of the multiple mounting blocks 31 is fixedly connected to the front of the heat sink 21 at equal intervals. Multiple mounting slots are provided at equal intervals on the back of the heat sink 1. The multiple mounting slots are arranged side by side at equal intervals. The mounting blocks 31 slide in the inner cavity of the mounting slots. The outer wall of the mounting blocks 31 fits against the inner wall of the mounting slots. The inner cavity of the mounting slots is slidably inserted into the mounting blocks 31.

[0028] Multiple through holes 32 are evenly spaced on the heat sink 21. The through holes 32 correspond to the fin gaps of the heat sink 1 and are used to absorb the flow of heat from the capacitor. Multiple through holes 33 are evenly spaced on the mounting block 31. The multiple through holes 33 are arranged vertically and correspond to the positions of the through holes 32. The through holes 33 are connected to the inner cavities of the through holes 32. Airflow flows into the inner cavity of the through holes 33 through the through holes 32 for the flow of hot air. Multiple through holes 34 are evenly spaced on the top of the mounting block 31. The through holes 34 are arranged vertically and are connected to the inner cavities of the through holes 33. Airflow flows into the inner cavity of the through holes 33 from the top and bottom of the heat sink 1 through the through holes 34.

[0029] Sleeves 35 are fixedly connected to the top and bottom of the front of the two mounting blocks 31. The sleeves 35 are set on the mounting blocks 31 on both sides and move together with the mounting blocks 31. They are used to install and support the compression springs 36 to ensure the stable movement of the compression springs 36. The compression springs 36 are set in the inner cavity of the sleeves 35. One end of the compression springs 36 is fixedly connected to the front of the mounting blocks 31, and the other end of the compression springs 36 is in contact with the back of the cooling fan 22. When the back of the heat sink 21 is in contact with the upper surface of the absorption capacitor, the heat sink 21 causes the mounting blocks 31 to slide on the heat sink fins 1, compressing the compression springs 36. The elasticity of the compression springs 36 is used to push the heat sink 21 to be stably in contact with the absorption capacitor.

[0030] The connecting mechanism 4 includes multiple fixing rods 41. One end of the fixing rod 41 is fixedly connected to the corner of the back of the cooling fan 22. The fixing rod 41 is used to fix the cooling fan 22. The middle of the other end of the fixing rod 41 is provided with a threaded hole 42 for connecting bolts 44. Grooves are provided on both sides of the back of the cooling fins 1. The back of the inner wall of the groove is in contact with the other end of the fixing rod 41. The fixing rod 41 is set in the inner cavity of the groove.

[0031] The back of the heat dissipation fins 1 is provided with multiple mounting holes 43 in a rectangular array at equal intervals. The mounting holes 43 correspond to the positions of the threaded holes 42. Bolts 44 are slidably inserted into the inner cavity of the mounting holes 43. One end of the bolts 44 is threaded into the inner cavity of the threaded holes 42. By aligning the back of the heat dissipation fan 22 with the front of the heat dissipation fins 1, the positions of the threaded holes 42 on the fixing rod 41 and the mounting holes 43 are aligned. One end of the bolts 44 is passed through the inner cavity of the mounting holes 43, and the bolts 44 are rotated so that one end is threaded into the inner wall of the threaded holes 42, thereby fixing the heat dissipation fan 22 and the heat dissipation fins 1.

[0032] The outer wall of the mounting block 31 is in contact with the inner wall of the mounting groove. The upper and lower surfaces of one end of the mounting block 31 are fixedly connected to the limiting block 5. The limiting block 5 is set in the inner cavity of the adjacent fins of the heat dissipation fin 1 and moves together with the mounting block 31 to limit the movement of the mounting block 31 and prevent the mounting block 31 from detaching from the heat dissipation fin 1.

[0033] Mounting rods 6 are fixedly connected to both sides of the back of the heat sink fin 1. The two mounting rods 6 are symmetrically arranged on both sides of the back of the heat sink fin 1. One end of the mounting rod 6 is in contact with the surface of the circuit board to support the heat sink fin 1, so that the heat sink fin 1 is positioned above the absorption capacitor. A threaded hole 7 is opened in the middle of one end of the mounting rod 6. The mounting rod 6 and the heat sink fin 1 are fixed at the position of the absorption capacitor by screws connected to the threaded hole 7, so as to facilitate heat dissipation of the absorption capacitor.

[0034] The working principle of this invention is as follows: When the back of the heat sink 21 is pressed against the upper surface of the absorption capacitor, the heat sink 21 is compressed, causing the mounting block 31 to slide on the heat dissipation fins 1. This compresses the compression spring 36, and the elasticity of the spring 36 pushes the heat sink 21 to stably adhere to the absorption capacitor. The operation of the cooling fan 22 causes hot air at the location of the absorption capacitor to flow into the inner cavity of the second through-hole 33 through through-holes 32 and 34, absorbing and conducting the heat from the absorption capacitor. The hot air blower 22 extracts air from the inner cavity of the through hole 2 33 and the air at the position of the heat dissipation fin 1, quickly dissipating heat from the absorption capacitor. At the same time, by aligning the back of the hot air blower 22 with the front of the heat dissipation fin 1, the threaded hole 1 42 on the fixing rod 41 corresponds to the position of the mounting hole 43. One end of the bolt 44 is passed through the inner cavity of the mounting hole 43, and the bolt 44 is rotated so that one end is threadedly connected to the inner wall of the threaded hole 1 42, thus fixing the hot air blower 22 and the heat dissipation fin 1, which facilitates the heat dissipation work of the hot air blower 22.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat dissipation device for the absorption capacitor of a wind power inverter power module, characterized in that, include: The heat dissipation fins (1) have a heat conduction mechanism (2) for heat conduction in the middle. The heat conduction mechanism (2) includes a heat dissipation plate (21) and a heat dissipation fan (22). The heat dissipation plate (21) is located on the back of the heat dissipation fins (1), and the heat dissipation fan (22) is located on the front of the heat dissipation fins (1). The mounting mechanism (3) is located on the front of the heat sink (21), and the connecting mechanism (4) is located on the back of the heat sink fan (22). The mounting mechanism (3) includes multiple mounting blocks (31). The back sides of the multiple mounting blocks (31) are fixedly connected to the front side of the heat sink (21) at equal intervals. Multiple mounting grooves are equally spaced on the back side of the heat sink fins (1). The inner cavity of the mounting grooves is slidably inserted into the mounting blocks (31). Multiple through holes (32) are equally spaced and uniformly opened on the heat sink (21). Multiple through holes (33) are equally spaced and uniformly opened on the mounting blocks (31). The through holes (33) and through holes (32) are connected. Corresponding to the position, the top of the mounting block (31) is provided with a plurality of through holes three (34) at equal intervals. The through holes three (34) are connected to the inner cavity of the through holes two (33). The top and bottom of the front of the two mounting blocks (31) are fixedly connected with sleeves (35). A compression spring (36) is provided in the inner cavity of the sleeve (35). One end of the compression spring (36) is fixedly connected to the front of the mounting block (31), and the other end of the compression spring (36) is in contact with the back of the cooling fan (22).

2. The heat dissipation device for the power module absorption capacitor of a wind power inverter according to claim 1, characterized in that, The connecting mechanism (4) includes multiple fixing rods (41). One end of the fixing rod (41) is fixedly connected to the corner of the back of the heat dissipation fan (22). A threaded hole (42) is opened in the middle of the other end of the fixing rod (41). Grooves are provided on both sides of the back of the heat dissipation fins (1). The back of the inner wall of the groove is in contact with the other end of the fixing rod (41).

3. The heat dissipation device for the power module absorption capacitor of a wind power inverter according to claim 2, characterized in that, The back of the heat dissipation fins (1) is provided with multiple mounting holes (43) in a rectangular array at equal intervals. Bolts (44) are slidably inserted into the inner cavity of the mounting holes (43), and one end of the bolts (44) is threadedly inserted into the inner cavity of the threaded hole (42).

4. According to claim 3, the outer wall of the mounting block (31) is in contact with the inner wall of the mounting groove, and the upper and lower surfaces of one end of the mounting block (31) are fixedly connected with limit blocks (5).

5. A heat dissipation device for the absorption capacitor of a wind power inverter power module according to claim 1, characterized in that, The heat dissipation fins (1) are fixedly connected to both sides of the back side with mounting rods (6), and a threaded hole (7) is provided in the middle of one end of the mounting rods (6).

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