A heat sink for a power converter

Abstract

The application relates to the technical field of converters, in particular to a converter heat dissipation device which comprises an adjusting part, a connecting assembly and a control module; the adjusting part comprises a flow guide plate arranged on one side of the converter; the connecting assembly comprises a driving part arranged on the flow guide plate, the driving part can adjust the angle of the flow guide plate; the control module comprises a collection unit arranged in the converter, the collection unit is connected with the driving part and can collect the temperature in the converter in real time; the driving part is electrically connected with the collection unit, the driving part adjusts the rotating angle of the flow guide plate according to the temperature information collected by the collection unit; the adjusting part, the connecting assembly and the control module are arranged, the driving rod can be driven by the motor after the temperature sensor signal is received by the microprocessor, the flow guide plate is driven to rotate at intervals, the adjacent plate pieces are respectively in the inclined and straight states, the angle of the flow guide plate is adjusted to realize the free switching of the efficient cooling and the moderate uniform temperature, and the problems of the fixed heat dissipation direction, the heat accumulation in the dead angle and the large temperature difference of the traditional heat dissipation are solved.

Description

Technical Field

[0001] This invention relates to the field of converter technology, and in particular to a converter heat dissipation device. Background Technology

[0002] In the field of wind power generation, the converter, as the core component of energy conversion, is mainly responsible for converting the fluctuating alternating current generated by the wind turbine into stable alternating current suitable for grid connection. Because wind speed is unstable, the voltage and frequency of the generator output also vary. The converter, through rectification and inversion processes, ensures that the quality of the output power meets grid requirements, while improving power generation efficiency and system stability. Furthermore, its heat dissipation performance directly affects the reliability and power generation efficiency of the entire system.

[0003] As wind turbine generators develop towards larger capacity and higher power density, especially with the widespread application of 10MW+ offshore models, traditional forced air cooling technology faces unprecedented challenges. On the one hand, the straight-line air ducts and parallel fin design commonly used in existing converter cabinets cause airflow to pass through rapidly in a laminar state, with the contact time between cold air and heating elements being less than 0.5 seconds, resulting in low heat exchange efficiency. Actual measurements show that only about 40% of the cold air flow can effectively participate in heat exchange. On the other hand, the 2-3mm thick thermal boundary layer formed on the surface of the power module severely hinders heat transfer, even with increased airflow. The temperature drop effect also shows a significant diminishing marginal effect. Furthermore, the temperature in the corners and edges of the cabinet is 15-25°C higher than that of the main channel. The heat dissipation efficiency of the middle layer of the multi-layer power module is 30-40% lower than that of the outer layer. The airflow speed in the dense capacitor bank area is less than 2m / s. The existing temperature monitoring has blind spots. The actual temperature in the dead corners may be 20°C higher than the monitored value and exceed the safety limit. These heat dissipation dead corners will directly lead to a 3-fold increase in the IGBT junction temperature fluctuation, a reduction in the life of electrolytic capacitors to 1 / 5 of the design value, and a 10-fold increase in the oxidation rate of connectors, ultimately increasing the overall system failure rate by 30-50%. Summary of the Invention

[0004] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0005] To address the shortcomings of existing technologies, one objective of this invention is to provide a converter heat dissipation device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a converter heat dissipation device, including an adjusting component, which includes a guide plate disposed on one side of the converter;

[0007] A connecting assembly includes a drive element disposed on a guide plate, the drive element being adjustable in angle of the guide plate;

[0008] The control module includes a data acquisition unit located within the converter, the data acquisition unit being connected to the drive unit and acquiring the temperature within the converter in real time;

[0009] The driving component is electrically connected to the acquisition unit, and the driving component adjusts the rotation angle of the guide plate according to the temperature information acquired by the acquisition unit.

[0010] As a preferred embodiment of the converter heat dissipation device of the present invention, the adjusting component further includes a fixing plate, the fixing plate is disposed on one side of the cooling fan, the guide plate is disposed on the fixing plate, and the guide plate is also provided with multiple sets of micro-grooves, the multiple sets of micro-grooves are linearly arrayed on the guide plate.

[0011] In a preferred embodiment of the converter heat dissipation device of the present invention, the driving component includes a connecting block, a rotating block, a groove, and a moving strip. The groove is formed on a fixed plate and is disposed at one end of a guide plate. The moving strip is disposed within the groove. The connecting block is disposed on the side wall of the guide plate. The rotating block is disposed on the connecting block. One end of the rotating block is connected to the moving strip.

[0012] In a preferred embodiment of the converter heat dissipation device of the present invention, the guide plates are provided in multiple sets, the interval between the multiple sets of guide plates is greater than the length of the rotating block, and the connecting blocks are spaced apart on the guide plates.

[0013] As a preferred embodiment of the converter heat dissipation device of the present invention, the driving component further includes a limiting block disposed at one end of the moving bar, and a connecting component disposed below the limiting block, which includes a rotating rod, a turntable, a cavity, and a control component. The rotating rod is disposed on the limiting block, the turntable is disposed below the turntable, the cavity is opened on the bottom surface of the turntable, and the control component is disposed below the turntable.

[0014] As a preferred embodiment of the converter heat dissipation device of the present invention, the cavity includes a circular groove and a sliding groove. The circular groove is opened in the middle of the turntable, and five sets of sliding grooves are provided. The five sets of sliding grooves are opened on the circular groove, and the sliding grooves are arranged in a circumferential array on the circular groove.

[0015] In a preferred embodiment of the converter heat dissipation device of the present invention, the control component includes a lever disposed on the slide groove and a motor disposed on the lever.

[0016] In a preferred embodiment of the converter heat dissipation device of the present invention, a fixing block is further provided between the lever and the motor, a push rod is further provided on one side of the fixing block, a spring is provided on the push rod, and a limit rod is provided on one side of the push rod.

[0017] In a preferred embodiment of the converter heat dissipation device of the present invention, the lever is located in the middle between the two sets of sliding grooves, and one end of the fixing block is a protrusion, the rotation direction of the protrusion is the same as the rotation direction of the end of the lever.

[0018] In a preferred embodiment of the converter heat dissipation device of the present invention, the edge of the protrusion is in contact with the push rod, and the distance from the rotation axis of the lever to the edge of the protrusion is greater than the distance from the push rod to the edge of the circular groove.

[0019] The advantages of the converter heat dissipation device of the present invention are as follows: By setting adjustment components, connecting components and control modules, after the microprocessor receives the temperature sensor signal, the motor drives the lever, which drives the guide plate to rotate at intervals via the turntable, rotating rod, moving bar and connecting block. The adjacent plates are in inclined and straight states respectively, and the airflow converges to form turbulent flow without dead angles. At night, water is stored in the micro-groove and evaporated for heat dissipation during the day. The heat-conducting graphite sheet is synchronously heated. The angle of the guide plate can be adjusted to achieve free switching between strong cooling and gentle temperature uniformity, which solves the problems of fixed airflow direction, dead angle heat accumulation and large temperature difference in traditional heat dissipation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the converter heat dissipation device of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the converter heat dissipation device of the present invention from another angle.

[0023] Figure 3 This is a schematic diagram of the connection assembly structure of the converter heat dissipation device of the present invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the bottom of the converter heat dissipation device of the present invention.

[0025] Figure 5 For the present invention Figure 2 Enlarged view of point A.

[0026] Figure 6 For the present invention Figure 4 Enlarged view of point B.

[0027] Figure 7 For the present invention Figure 3 Enlarged view of point C.

[0028] In the diagram: 100, Adjusting component; 101, Guide plate; 200, Connecting assembly; 201, Driving component; 300, Control module; 301, Acquisition unit; 102, Fixing plate; 101a, Microgroove; 201a, Connecting block; 201b, Rotating block; 201c, Groove; 201d, Moving bar; 202, Limiting block; 203, Connecting component; 203a, Rotating rod; 203b, Turntable; 203c, Cavity; 203d, Control component; 203c1, Circular groove; 203c2, Sliding groove; 203d1, Toggle lever; 203d2, Motor; 204, Fixing block; 205, Push rod; 206, Spring; 207, Limiting rod; 204a, Protrusion. Detailed Implementation

[0029] To make the objectives, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Reference Figures 1-7 This is one embodiment of the present invention. This embodiment provides a converter heat dissipation device that can achieve the effect of freely switching between strong cooling and gentle and uniform temperature by adjusting the angle of the guide plate 101. It includes: an adjustment member 100, which includes a guide plate 101 disposed on one side of the converter.

[0033] The connecting assembly 200 includes a drive member 201 disposed on the guide vane 101, the drive member 201 being adjustable in angle of the guide vane 101;

[0034] The control module 300 includes a data acquisition unit 301 installed inside the converter. The data acquisition unit 301 is connected to the drive unit 201 and acquires the temperature inside the converter in real time.

[0035] The driving component 201 is electrically connected to the acquisition unit 301. The driving component 201 adjusts the rotation angle of the guide plate 101 according to the temperature information acquired by the acquisition unit 301.

[0036] The air deflector 101 is mounted on one side of the cooling fan via a rotating shaft. The output shaft of the motor 203d2 is mechanically connected to the air deflector 101. The control module 300 uses a microprocessor as the main control unit and is equipped with multiple temperature sensors as data acquisition units 301. These sensors are located at key heat-generating components within the converter and are connected to the main control board via cables. The system employs an intelligent adjustment algorithm. When the detected temperature exceeds a set threshold, the main control unit outputs a control signal to drive the motor 203d2 to adjust the angle of the air deflector 101. Simultaneously, it dynamically optimizes the deflection direction of the air deflector 101 based on the temperature difference at each measuring point. The system also has data communication capabilities, allowing operating parameters to be uploaded to a monitoring system. In practical implementation, the air deflector 101 has an initial installation angle. When the ambient temperature is high, the adjustment function is automatically activated. This device effectively improves heat dissipation uniformity, reduces equipment temperature differences, enhances heat dissipation efficiency, and reduces fan energy consumption.

[0037] Furthermore, the adjusting component 100 also includes a fixing plate 102, which is disposed on one side of the cooling fan. A guide plate 101 is disposed on the fixing plate 102, and multiple sets of microgrooves 101a are formed on the guide plate 101. The multiple sets of microgrooves 101a are linearly arrayed on the guide plate 101, and the guide plate 101 is rotatably connected to the fixing plate 102.

[0038] The adjusting component 100 adds a fixing plate 102 to the original cooling fan and guide plate 101. The fixing plate 102 is tightly attached to the exhaust side of the cooling fan by bolts or snap-fit. Multiple sets of micro-grooves 101a are formed on the guide plate 101, which causes the high-speed airflow to generate secondary vortices in the micro-grooves 101a, significantly reducing the boundary layer thickness and improving the heat transfer coefficient. At the same time, the gap between the fixing plate 102 and the guide plate 101 is filled with 0.2mm thick thermally conductive graphite near the center of the fan. The airflow from the micro-groove 101a carries away the heat from the fan bearing area, achieving a synchronous temperature drop across the fan body, the fixed plate 102, and the guide plate 101. Furthermore, when the ambient humidity increases at night, the capillary structure of the micro-groove 101a actively adsorbs and stores condensate. The cross-section formed at the bottom of the groove causes the surface tension difference to drive the water to spread evenly along the length of the groove. When the fan blades are restarted during the day, the airflow passes over the micro-groove 101a, and the water evaporates rapidly, carrying away vaporization and reducing the surface temperature of the guide plate 101.

[0039] Furthermore, the driving component 201 includes a connecting block 201a, a rotating block 201b, a groove 201c, and a moving strip 201d. The groove 201c is formed on the fixed plate 102 and is disposed at one end of the guide plate 101. The moving strip 201d is disposed within the groove 201c. The connecting block 201a is disposed on the side wall of the guide plate 101. The rotating block 201b is disposed on the connecting block 201a, and one end of the rotating block 201b is connected to the moving strip 201d.

[0040] When the moving bar 201d moves, it drives the guide plate 101 to rotate on the fixed plate 102 under the pull of the rotating block 201b.

[0041] Furthermore, multiple sets of guide vanes 101 are provided, and the interval between multiple sets of guide vanes 101 is greater than the length of the rotating block 201b. Connecting blocks 201a are spaced apart on the guide vanes 101.

[0042] The guide plates 101 are arranged in an array at equal intervals in the direction of the cooling fan's exhaust. The center distance between two adjacent guide plates 101 is greater than the axial length of the rotating block 201b, ensuring that the end of the rotating block 201b will not mechanically interfere with the guide plates 101 at any swing angle. The edges of the guide plates 101 are CNC chamfered to further reduce wind resistance. Connecting blocks 201a are spaced on the guide plates 101. When the moving bar 201d moves, multiple sets of guide plates 101 rotate at intervals, while the guide plates 101 not connected to the connecting blocks 201a remain stationary.

[0043] Furthermore, the driving component 201 also includes a limiting block 202 disposed at one end of the moving bar 201d, and a connecting component 203 disposed below the limiting block 202, which includes a rotating rod 203a, a turntable 203b, a cavity 203c, and a control component 203d. The rotating rod 203a is disposed on the limiting block 202, the turntable 203b is disposed below the turntable 203b, the cavity 203c is opened on the bottom surface of the turntable 203b, and the control component 203d is disposed below the turntable 203b.

[0044] The driving component 201 drives the moving strip 201d to move: when the rotating rod 203a rotates, the moving strip 201d moves back and forth under the limit of the groove 201c, and the rotation angle of the rotating rod 203a can control the distance the moving strip 201d moves, that is, control the rotation angle of the guide plate 101.

[0045] Furthermore, the cavity 203c includes a circular groove 203c1 and a sliding groove 203c2. The circular groove 203c1 is formed in the middle of the turntable 203b. Five sets of sliding grooves 203c2 are provided, which are formed on the circular groove 203c1 and arranged in a circumferential array on the circular groove 203c1.

[0046] Furthermore, the control component 203d includes a lever 203d1 disposed on the slide groove 203c2, and a motor 203d2 disposed on the lever 203d1.

[0047] Among them, the motor 203d2 drives the lever 203d1 to rotate. When the lever 203d1 rotates, its end is slidably connected to the slide groove 203c2. The slide groove 203c2 drives the turntable 203b to rotate. After the lever 203d1 rotates one revolution, the turntable 203b rotates a certain angle.

[0048] Furthermore, a fixing block 204 is provided between the lever 203d1 and the motor 203d2. A push rod 205 is provided on one side of the fixing block 204. A spring 206 is provided on the push rod 205. A limit rod 207 is provided on one side of the push rod 205.

[0049] Furthermore, the lever 203d1 is positioned in the middle between the two sets of sliding grooves 203c2, and one end of the fixing block 204 is a protrusion 204a, the rotation direction of the protrusion 204a is the same as the rotation direction of the end of the lever 203d1.

[0050] Furthermore, the edge of the protrusion 204a is in contact with the push rod 205, and the distance from the rotation axis of the lever 203d1 to the edge of the protrusion 204a is greater than the distance from the push rod 205 to the edge of the circular groove 203c1.

[0051] In this configuration, for every revolution of motor 203d2, lever 203d1 moves slide groove 203c2 once, causing turntable 203b to advance one step. A fixing block 204 is fitted between lever 203d1 and the shaft of motor 203d2. A push rod 205 with a spring 206 is mounted on the side of fixing block 204. A limiting rod 207 is provided inside push rod 205. Spring 206 always presses push rod 205 against protrusion 204a. Protrusion 204a is integral with fixing block 204 and rotates synchronously with motor 203d2. When protrusion 204a moves push rod 205 for each revolution... The limiting rod 207 temporarily enters the slide groove 203c2 to prevent excessive displacement; the lever 203d1 is located between two adjacent slide grooves 203c2, the direction of the protrusion 204a is consistent with the direction of the end of the lever 203d1, the edge of the protrusion 204a is close to the inner edge of the push rod 205, the radius of rotation from the axis of the lever 203d1 to the edge of the protrusion 204a is greater than the distance from the push rod 205 to the edge of the circular groove 203c1, so the protrusion 204a pushes the push rod 205 away first and then makes way, and the lever 203d1 then moves the slide groove 203c2. The actions are continuous and do not interfere with each other.

[0052] Working principle: After the system starts, the microprocessor collects the internal temperature of the converter in real time through multiple temperature sensors. When any temperature measurement point exceeds the set threshold, the motor 203d2 immediately drives the lever 203d1 to rotate. The end of the lever 203d1 slides into the groove 203c2 on the circular groove 203c1 of the turntable 203b, pushing the turntable 203b one step. The turntable 203b synchronously drives the rotating rod 203a to rotate. The rotating rod 203a pulls the limiting block 202 and the moving bar 201d fixed to it to move back and forth in the groove 201c of the fixed plate 102. The moving bar 201d pulls the guide plate 101 to rotate around the rotating shaft on the fixed plate 102 through the rotating block 201b and the connecting block 201a. Only those connected to the connecting block 201a are driven in sequence, while the others remain stationary. The distance between adjacent guide plates 101 is greater than that between the rotating blocks 201b and 201a. 1b length avoids interference; the surface of the guide plate 101 has densely packed linear microgrooves 101a. At night, under high humidity, the microgrooves 101a capillary adsorb condensate and spread evenly. During the day, after the fan starts, the airflow sweeps over the microgrooves 101a to form a secondary vortex. The moisture evaporates and carries away the latent heat of vaporization. At the same time, the heat-conducting graphite sheet conducts the bearing heat laterally to the guide plate 101. The temperature of the guide plate 101, the fixing plate 102 and the fan body decreases synchronously. For each revolution of the motor 203d2, the protrusion 204a and the fixing block 204 rotate together. First, the push rod 205 with spring 206 is pushed open. The limit rod 207 temporarily enters the slide groove 203c2 to prevent overshoot. Then, the lever 203d1 accurately moves the next slide groove 203c2. The action is smooth and without interference. The system continuously adjusts the angle of the guide plate 101 in a closed loop until the temperature difference converges and uploads the operating data to the monitoring system.

[0053] When the motor 203d2 drives the lever 203d1 to step, the guide plate 101 rotates at intervals—two sets of driven plates tilt and open, while the stationary plate in between maintains its original angle. Thus, two streams of airflow, one inclined and one straight, are split from the same air duct. They suddenly converge between the plates to form strong turbulence. The cold air is carried by this turbulence and trapped inside the converter, rolling along the cavity wall without dead angles. If the angle of the guide plate 101 increases, the inclined airflow directly impacts the surface of the heating element, forming a high-speed jet that adheres to the wall and quickly carries away the heat. If the angle decreases, the angle between the inclined and straight airflows becomes gentler, the turbulence intensity decreases, and the cold air slowly diffuses in the gap between the elements, achieving gentle and uniform heat dissipation. The system can switch between powerful cooling and uniform temperature at will by fine-tuning the angle.

[0054] In summary, by setting the adjustment component 100, connecting component 200, and control module 300, after the microprocessor receives the temperature sensor signal, the motor 203d2 drives the lever 203d1, which in turn drives the guide plate 101 to rotate at intervals via the turntable 203b, rotating rod 203a, moving bar 201d, and connecting block 201a. Adjacent plates are in inclined and straight states respectively, and the airflow converges to form turbulent flow without dead angles. At night, the micro-groove 101a stores water, and during the day, it evaporates and dissipates heat. The heat-conducting graphite sheet is synchronously heated. Adjusting the angle of the guide plate 101 allows for free switching between powerful cooling and gentle, uniform cooling, solving the problems of fixed airflow direction, heat accumulation in dead angles, and large temperature differences in traditional heat dissipation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A converter heat dissipation device, characterized in that: include, Adjustment component (100), which includes a guide vane (101) disposed on one side of the converter. A connecting assembly (200) includes a drive element (201) disposed on a baffle (101), the drive element (201) being adjustable for the angle of the baffle (101); The control module (300) includes a data acquisition unit (301) disposed in the converter, the data acquisition unit (301) being connected to the drive unit (201) and acquiring the temperature inside the converter in real time; The driving component (201) is electrically connected to the acquisition unit (301), and the driving component (201) adjusts the rotation angle of the guide plate (101) according to the temperature information acquired by the acquisition unit (301). The adjusting component (100) also includes a fixing plate (102), which is disposed on one side of the cooling fan. The guide plate (101) is disposed on the fixing plate (102), and multiple sets of micro-grooves (101a) are also formed on the guide plate (101). The multiple sets of micro-grooves (101a) are linearly arrayed on the guide plate (101), and the guide plate (101) is rotatably connected to the fixing plate (102). The driving component (201) includes a connecting block (201a), a rotating block (201b), a groove (201c), and a moving strip (201d). The groove (201c) is formed on the fixed plate (102) and is disposed at one end of the guide plate (101). The moving strip (201d) is disposed in the groove (201c). The connecting block (201a) is disposed on the side wall of the guide plate (101). The rotating block (201b) is disposed on the connecting block (201a). One end of the rotating block (201b) is connected to the moving strip (201d). When the moving strip (201d) moves, it drives the guide plate (101) to rotate on the fixed plate (102) under the pull of the rotating block (201b). The guide plate (101) is provided in multiple sets, and the interval between the multiple sets of guide plates (101) is greater than the length of the rotating block (201b). The connecting block (201a) is spaced on the guide plate (101). When the motor (203d-2) drives the lever (203d-1) to step, the guide plate (101) rotates at intervals - the two sets of driven plates tilt and open, and the stationary plate in between maintains the original angle.

2. The converter heat dissipation device as described in claim 1, characterized in that: The driving component (201) further includes a limiting block (202) disposed at one end of the moving bar (201d) and a connecting component (203) disposed below the limiting block (202), which includes a rotating rod (203a), a turntable (203b), a cavity (203c) and a control component (203d). The rotating rod (203a) is disposed on the limiting block (202), the turntable (203b) is disposed below the turntable (203b), the cavity (203c) is opened on the bottom surface of the turntable (203b), and the control component (203d) is disposed below the turntable (203b).

3. The converter heat dissipation device as described in claim 2, characterized in that: The cavity (203c) includes a circular groove (203c-1) and a sliding groove (203c-2). The circular groove (203c-1) is located in the middle of the turntable (203b). Five sets of sliding grooves (203c-2) are provided, and the five sets of sliding grooves (203c-2) are located on the circular groove (203c-1). The sliding grooves (203c-2) are arranged in a circumferential array on the circular groove (203c-1).

4. The converter heat dissipation device as described in claim 3, characterized in that: The control component (203d) includes a lever (203d-1) disposed on the slide (203c-2) and a motor (203d-2) disposed on the lever (203d-1).

5. The converter heat dissipation device as described in claim 4, characterized in that: A fixing block (204) is also provided between the lever (203d-1) and the motor (203d-2). A push rod (205) is also provided on one side of the fixing block (204). A spring (206) is provided on the push rod (205). A limit rod (207) is provided on one side of the push rod (205).

6. The converter heat dissipation device as described in claim 5, characterized in that: The lever (203d-1) is located in the middle between the two sets of sliding grooves (203c-2), and one end of the fixing block (204) is a protrusion (204a). The rotation direction of the protrusion (204a) is the same as the rotation direction of the end of the lever (203d-1).

7. The converter heat dissipation device as described in claim 6, characterized in that: The edge of the protrusion (204a) is in contact with the push rod (205), and the distance from the rotation axis of the lever (203d-1) to the edge of the protrusion (204a) is greater than the distance from the push rod (205) to the edge of the circular groove (203c-1).

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