A frequency converter IGBT heat sink
By using a modular design and replaceable heat sink fins, the inverter IGBT heat sink solves the problems of complex disassembly, poor sealing, and non-replaceable heat sinks in traditional heat sinks, achieving convenient maintenance and efficient heat dissipation, and extending equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI YUANHE ELECTRONIC APPLIANCE CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-16
AI Technical Summary
Traditional inverter IGBT heat sinks suffer from problems such as cumbersome disassembly, poor sealing, non-replaceable heat dissipation performance, and insufficient adaptability, leading to maintenance difficulties, impurities entering and affecting heat dissipation effect and equipment lifespan.
The modularly designed protective shell is connected to the mounting base plate via connecting screws to prevent impurities from entering, and the heat dissipation fins are replaceable to ensure a tight connection and good heat dissipation performance.
It enables convenient maintenance, prevents impurities from entering, extends equipment life, maintains stable operation, improves heat dissipation efficiency, and avoids equipment overheating and damage.
Smart Images
Figure CN224368190U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of inverter heat sinks, and more particularly to an inverter IGBT heat sink. Background Technology
[0002] In modern industrial automation and power electronics, frequency converters, as key equipment, are widely used in motor speed control, power system energy saving, and many other aspects. IGBTs (Insulated Gate Bipolar Transistors), as the core power devices of frequency converters, generate a large amount of heat during operation. If this heat cannot be dissipated in time, the performance of the IGBTs will degrade, and they may even be damaged due to overheating, thus affecting the normal operation of the entire frequency converter. Therefore, IGBT heat sinks play a crucial role in ensuring the stable operation of frequency converters, and their performance directly affects the continuity of industrial production and the service life of the equipment.
[0003] Currently, traditional inverter IGBT heat sinks have several problems. In terms of structural design, many traditional heat sinks use an integrated design for the protective structure and mounting base. While this design ensures overall stability to some extent, it greatly inconveniences the maintenance of internal components. For example, when an internal component malfunctions and needs repair or replacement, the overall structure limits the complexity and time-consuming process, often requiring significant manpower. Furthermore, the sealing at the joints of this integrated structure is poor, allowing dust, oil, and other impurities to easily enter the heat sink and adhere to the IGBT and other component surfaces in industrial environments. Over time, this accumulation of impurities not only affects heat dissipation but can also lead to short circuits and other malfunctions, shortening the inverter's lifespan. Regarding heat dissipation performance, the cooling fins of traditional heat sinks are mostly fixed and cannot be replaced. After prolonged use, the cooling fins gradually degrade in heat dissipation performance due to dust blockage, oxidation, and corrosion. Since replacement is not possible, the entire heat sink must be replaced, undoubtedly increasing operating costs. In addition, traditional radiators are often not designed with full consideration of the differences in different industrial environments and the actual heat dissipation requirements of frequency converters, resulting in low heat dissipation efficiency and inability to meet the needs of some application scenarios with high heat dissipation requirements.
[0004] In response to this technical problem, this application proposes a heat sink for IGBTs in frequency converters. Utility Model Content
[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a frequency converter IGBT heat sink that facilitates the maintenance of internal components. Furthermore, the tight connection effectively prevents dust and other impurities from entering, reducing malfunctions caused by impurity accumulation, extending the lifespan of the frequency converter, ensuring stable operation in complex environments, avoiding overheating damage due to poor heat dissipation, and improving the reliability of equipment operation.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] An IGBT heat sink for a frequency converter includes a protective housing. A mounting base plate is connected to the bottom side of the protective housing via a connecting assembly. Two reserved placement slots are formed on the top side of the mounting base plate. Mounting bases are slidably connected inside the two reserved placement slots. Heat dissipation fins are provided on the top side of the two mounting bases. Pre-set connecting blocks are fixedly connected to the adjacent sides of the two mounting bases. Two fixed limiting plates are fixedly connected to the middle of the top side of the mounting base plate. Two limiting mounting blocks are fixedly connected to the opposite sides of the two fixed limiting plates. A clamping assembly is provided on the adjacent sides of the two limiting mounting blocks.
[0008] Furthermore, the connecting assembly includes two connecting screws that are threaded to both ends of the protective housing, and a supporting slide rod is slidably connected to the bottom end of each of the two connecting screws. An abutment spring is provided on the top side of the mounting base plate.
[0009] Furthermore, one end of the abutment spring is connected to the inside of the connecting screw, and the other end is connected to the top side of the support slide rod.
[0010] Furthermore, the clamping assembly includes two limiting clamping plates that are rotatably connected to the side of the two limiting mounting blocks that are close to each other, a preset pressure plate that is fixedly connected to the side of the two limiting clamping plates that are far apart, and a return spring that is provided on the side of the two limiting clamping plates that are far apart.
[0011] Furthermore, one end of the reset spring is connected to the preset pressure plate, and the other end is connected to the fixed limiting plate.
[0012] Furthermore, two pre-reserved mounting holes are provided at both the left and right ends of the protective housing, and two pre-reserved mounting holes are provided at both the left and right ends of the mounting base plate.
[0013] Furthermore, the positions of the first reserved mounting hole and the second reserved mounting hole are corresponding.
[0014] Furthermore, three metal pins are fixedly connected to the top side of the protective housing, and two fixed connection ends are fixedly connected to the right end of the protective housing, with metal emitters fixedly connected inside each of the two fixed connection ends.
[0015] This utility model has the following beneficial effects:
[0016] 1. In this utility model, the frequency converter adopts a modular design, with the protective housing and mounting base plate connected by connecting screws. During installation, align the pre-drilled mounting holes and screw in the connecting screws; the reaction force of the spring ensures a tight connection. This design not only facilitates installation and disassembly and maintenance of internal components, but also effectively prevents dust and other impurities from entering, reducing malfunctions caused by impurity accumulation, extending the frequency converter's service life, and ensuring stable operation in complex environments.
[0017] 2. In this utility model, the heat dissipation fins on the mounting base plate are designed to be replaceable. When the heat dissipation effect of the heat dissipation fins decreases due to prolonged use, the operator can easily remove and replace them by pressing the preset pressure plate. Installing new fins is also convenient; after releasing the pressure plate, the return spring resets the limit clamp to complete the clamping. This design ensures that the frequency converter always has good heat dissipation performance, avoids overheating damage caused by poor heat dissipation, and improves the reliability of equipment operation. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of an IGBT heat sink for a frequency converter proposed in this utility model;
[0019] Figure 2 This is a partial structural diagram of an IGBT heat sink for a frequency converter proposed in this utility model;
[0020] Figure 3 This is a schematic diagram of the heat dissipation mechanism of an IGBT heat sink for a frequency converter according to the present invention;
[0021] Figure 4 This is a schematic diagram of a fixing mechanism for an IGBT heat sink of a frequency converter according to the present invention;
[0022] Figure 5 This is a schematic diagram of the connection mechanism of an IGBT heat sink for a frequency converter proposed in this utility model.
[0023] Legend:
[0024] 1. Protective housing; 2. Mounting base plate; 3. Metal pins; 4. Fixed connection end; 5. Metal emitter; 6. Pre-drilled mounting hole one; 7. Pre-drilled mounting hole two; 8. Mounting base; 9. Connecting screw; 10. Pre-set connecting block; 11. Pre-drilled placement slot; 12. Heat dissipation fins; 13. Limiting mounting block; 14. Fixed limiting plate; 15. Return spring; 16. Pre-set pressure plate; 17. Limiting clamp; 18. Abutment spring; 19. Support slide rod. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Reference Figures 1-3 This utility model provides an embodiment of an IGBT heat sink for a frequency converter, comprising a protective housing 1. A mounting base plate 2 is connected to the bottom side of the protective housing 1 via a connecting screw 9. Two reserved placement slots 11 are formed on the top side of the mounting base plate 2. Mounting bases 8 are slidably connected inside each of the two reserved placement slots 11. Heat dissipation fins 12 are provided on the top sides of each of the two mounting bases 8. Pre-set connecting blocks 10 are fixedly connected to the adjacent sides of the two mounting bases 8. Two fixed limiting plates 14 are fixedly connected to the middle of the top side of the mounting base plate 2. Two limiting mounting blocks 13 are fixedly connected to the opposite sides of the two fixed limiting plates 14. Limiting clamps 17 are rotatably connected to the adjacent sides of the two limiting mounting blocks 13. One end of a retaining spring 18 is connected to the inside of the connecting screw 9, and the other end is connected to the top side of a supporting slide rod 19. One end of a return spring 15 is connected to a preset pressure plate 16, and the other end is connected to the fixed limiting plate 14. The protective housing 1 has two pre-drilled mounting holes 6 on both its left and right ends, and the mounting base plate 2 has two pre-drilled mounting holes 7 on both its left and right ends. The positions of the pre-drilled mounting holes 6 and 7 are corresponding. Three metal pins 3 are fixedly connected to the top side of the protective housing 1, and two fixed connection ends 4 are fixedly connected to the right end of the protective housing 1. Each of the two fixed connection ends 4 has a metal emitter 5 fixedly connected inside.
[0027] Specifically, when using a frequency converter IGBT heatsink, its top protective housing 1 and mounting base plate 2 adopt a modular design, and the two are connected by connecting screws 9. The reserved mounting holes 6 on the protective housing 1 correspond to the reserved mounting holes 7 on the mounting base plate 2. During installation, the protective housing 1 is first placed on the top side of the mounting base plate 2, and the reserved mounting holes 6 and 7 are carefully aligned. Then, the connecting screws 9 are installed into the corresponding holes. The metal emitter 5 is used to conduct current and participates in power conversion in the frequency converter circuit. Utilizing the good conductivity of metal, it enables the driving of IGBT devices and the transmission of related electrical signals.
[0028] Reference Figure 5 The protective housing 1 has two connecting screws 9 threaded to both ends on the left and right sides. The bottom ends of the two connecting screws 9 are slidably connected to support slide rods 19. The mounting base plate 2 has a retaining spring 18 on its top side.
[0029] Specifically, under the action of the threaded connection, the connecting screw 9 will move linearly in the vertical direction. When the connecting screw 9 is screwed to the bottom of the second pre-reserved mounting hole 7, the top of the connecting screw 9 will be in complete contact with the top of the first pre-reserved mounting hole 6. At this time, the sliding support rod 19 at the bottom of the connecting screw 9, under the elastic action of the abutment spring 18, will apply a continuous reaction force to the connecting screw 9 and the interior of the second pre-reserved mounting hole 7. This makes the connection between the protective housing 1 and the mounting base plate 2 tighter, effectively preventing dust and other impurities from entering the inverter and protecting important components such as the IGBT inside.
[0030] Reference Figure 4 Two limit mounting blocks 13 are rotatably connected to two limit clamps 17 on the side of their proximity, and two limit clamps 17 are fixedly connected to a preset pressure plate 16 on the side of their separation. Two limit clamps 17 are provided with a reset spring 15 on the side of their separation.
[0031] Specifically, the heat dissipation fins 12 installed on the top side of the mounting base 2 are replaceable. When the heat dissipation effect of the heat dissipation fins 12 decreases due to prolonged use, they need to be replaced. At this time, the operator presses the preset pressure plate 16 to open the two limiting clamps 17, so that the preset connecting block 10 fixed on the mounting base 8 can be released from the clamping and fixing state of the two limiting clamps 17, and then the two heat dissipation fins 12 can be removed and replaced. When installing a new heat dissipation fin 12, the operation steps are similar. Press the preset pressure plate 16 again to open the limiting clamps 17. After the mounting base 8 is installed, release the preset pressure plate 16. At this time, the return spring 15 generates elastic potential energy due to the previous deformation, which drives the two limiting clamps 17 to return to their original position, thereby completing the clamping and fixing of the new heat dissipation fin 12.
[0032] Working principle: The protective housing 1 and mounting base plate 2 on the top side of the inverter are modularly designed. The protective housing 1 and the mounting base plate 2 are connected by connecting screws 9. When the protective housing 1 is placed on the top side of the mounting base plate 2, the reserved mounting hole 1 6 and the reserved mounting hole 2 7 must be aligned. Then the connecting screw 9 is installed. The top of the connecting screw 9 is in full contact with the top of the reserved mounting hole 1 6. At this time, the support slide rod 19 sliding at the bottom of the connecting screw 9 generates a continuous reaction force on the connecting screw 9 and the interior of the reserved mounting hole 2 7 under the elastic action of the abutment spring 18. This makes the connection between the protective housing 1 and the mounting base plate 2 tighter and prevents dust and other impurities from entering the interior.
[0033] The heat sink fins 12 mounted on the top side of the mounting base plate 2 are designed to be replaceable. When the inverter is running, the heat generated by the IGBT chip is first transferred to the mounting base 8 via heat conduction, and then to the heat sink fins 12. The heat diffuses on the heat sink fins 12, making the temperature distribution more uniform. The surface of the heat sink fins 12 undergoes thermal convection with the surrounding air, and the airflow carries away the heat. At the same time, the surface of the heat sink fins 12 also dissipates heat to the surrounding environment through thermal radiation. When the heat dissipation effect of the heat dissipation fins 12 decreases due to prolonged use, the old heat dissipation fins 12 can be removed and replaced with new ones by pressing the preset pressure plate 16 to open the limiting clamps 17 and maintain good heat dissipation performance, ensuring stable operation of the frequency converter. When the heat dissipation effect of the heat dissipation fins 12 decreases due to prolonged use, and it is necessary to replace the heat dissipation fins 12, the operator can press the preset pressure plate 16 to open the two limiting clamps 17, causing the preset connecting block 10 fixed on the mounting base 8 to disengage from the clamping and fixing state of the two limiting clamps 17, thereby removing the two heat dissipation fins 12 for replacement. When installing new heat dissipation fins 12, simply repeat the above pressing operation to open the limiting clamps 17. After the mounting base 8 is installed, release the preset pressure plate 16. Under the action of the elastic potential energy generated by the deformation of the return spring 15, the two limiting clamps 17 will be reset, completing the clamping.
[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.
Claims
1. A frequency converter IGBT heat sink, comprising a protective housing (1), characterized in that: The bottom side of the protective shell (1) is connected to the mounting base plate (2) via a connecting component. The top side of the mounting base plate (2) has two reserved placement slots (11). The two reserved placement slots (11) are slidably connected to the mounting bases (8). The top side of the two mounting bases (8) is provided with heat dissipation fins (12). The two mounting bases (8) are fixedly connected to the adjacent side with a preset connecting block (10). The middle of the top side of the mounting base plate (2) is fixedly connected to two fixed limiting plates (14). The two fixed limiting plates (14) are fixedly connected to the opposite side with two limiting mounting blocks (13). The adjacent side of the two limiting mounting blocks (13) is provided with a clamping component.
2. The inverter IGBT heat sink according to claim 1, characterized in that: The connecting assembly includes two connecting screws (9) that are threaded to both the left and right ends of the protective housing (1). The bottom ends of the two connecting screws (9) are slidably connected to a support slide rod (19). The top side of the mounting base plate (2) is provided with an abutment spring (18).
3. The inverter IGBT heat sink according to claim 2, characterized in that: One end of the abutment spring (18) is connected to the inside of the connecting screw (9), and the other end is connected to the top side of the support slide (19).
4. The inverter IGBT heat sink according to claim 1, characterized in that: The clamping assembly includes two limiting clamps (17) that are rotatably connected to the two limiting mounting blocks (13) on the side closest to each other. A preset pressure plate (16) is fixedly connected to the side of the two limiting clamps (17) that is far apart from each other. A reset spring (15) is provided on the side of the two limiting clamps (17) that is far apart from each other.
5. A frequency converter IGBT heat sink according to claim 4, characterized in that: One end of the reset spring (15) is connected to the preset pressure plate (16), and the other end is connected to the fixed limiting plate (14).
6. The inverter IGBT heat sink according to claim 1, characterized in that: The protective shell (1) has two reserved mounting holes (6) on both the left and right sides, and the mounting base plate (2) has two reserved mounting holes (7) on both the left and right sides.
7. A frequency converter IGBT heat sink according to claim 6, characterized in that: The reserved mounting hole one (6) corresponds to the reserved mounting hole two (7) in position.
8. The inverter IGBT heat sink according to claim 1, characterized in that: The protective housing (1) has three metal pins (3) fixedly connected to its top side, and two fixed connection ends (4) fixedly connected to the right end of the protective housing (1). Both fixed connection ends (4) have metal emitters (5) fixedly connected inside.