A high-efficiency heat-dissipation dustproof device for power distribution cabinet

Abstract

The application belongs to the technical field of power distribution cabinet heat dissipation, and discloses a high-efficiency heat dissipation dustproof device for power distribution cabinet, which comprises a cabinet body, a plurality of mounting plates are fixedly connected in the inner cavity of the cabinet body, an air pump is fixedly connected to the outer wall of the cabinet body, and a dust filter is fixedly connected to the air inlet end of the air pump. Through cooperation of the medium cavity, the steam exhaust pipe, the inclined rod, the fork lever, the valve rod, the valve core and the secondary air pipe and other structures, self-adaptive adjustment of the heat generation and the cooling air volume is realized. When the temperature rises, the low-boiling-point working medium in the medium cavity vaporizes and expands, the steam pressure pushes the inclined rod to move upward, the valve core is rotated through the fork lever and the handle, the opening of the secondary air pipe is proportionally increased, the cooling air volume blowing to the heat-generating components is automatically increased with the temperature rise, and vice versa. The valve core opening is automatically reduced. The response is rapid, the adjustment accuracy is proportional to the heat generation, and the contradiction between the insufficient heat dissipation of high-load components and the excessive cooling of low-load components caused by traditional uniform air cooling is accurately solved.

Description

Technical Field

[0001] This invention belongs to the field of power distribution cabinet heat dissipation technology, specifically a high-efficiency heat dissipation and dust prevention device for power distribution cabinets. Background Technology

[0002] The distribution cabinet integrates a large number of electrical components such as circuit breakers, contactors, relays, and frequency converters. During long-term operation, it generates a lot of heat. The main function of heat dissipation is to dissipate the heat inside the cabinet in a timely manner to prevent the temperature from exceeding the rated operating temperature of the electrical components (usually 40℃ to 60℃). This avoids accidents such as accelerated insulation aging, increased contact resistance, component malfunction, or even burnout caused by overheating. It is estimated that for every 10℃ increase in temperature above the rated value, the service life of the electrical components is shortened by about half. The core function of dust prevention is to prevent dust, fibers, metal shavings, and other particles in the outside air from entering the cabinet. This prevents dust from accumulating on the surface of components, affecting heat dissipation efficiency, or adhering to contacts and circuit boards, causing electrical faults such as poor contact, creepage, and short circuits.

[0003] The prior art document, CN118889230A, discloses a mobile vibration-damping and heat-dissipating power distribution cabinet, which includes a dustproof heat dissipation cabinet mounted on a vibration-damping trolley. The cabinet includes a cabinet body mounted on the trolley, with several air outlets and inlets on the side of the cabinet body. The cabinet body also has a sealed door. An automatic dust removal device is installed at the air inlet of the cabinet body, with a first dustproof net installed on the automatic dust removal device. The automatic dust removal device also has an air suction device for drawing air, a power transmission device for transferring kinetic energy to the automatic dust removal device, and a guiding air delivery mechanism for guiding airflow. Each air outlet of the cabinet body is equipped with a pull-out dust removal mechanism, with a second dustproof net installed on the pull-out dust removal mechanism. This application can effectively prevent dust from entering the equipment and causing damage, while maintaining heat dissipation.

[0004] While the aforementioned patent achieves basic heat dissipation and dust prevention functions by setting up air inlets, outlets, automatic dust removal devices, and suction devices, it cannot effectively solve the problems of insufficient heat dissipation of hot spots caused by uniform air cooling and the simplistic dust prevention logic. This solution performs uniform air cooling in all areas, but the local heat flux density of IGBT modules far exceeds that of ordinary electrical components, reaching over 100W / cm². Uniform heat dissipation cannot effectively solve the hot spot problem of high-load components, which can easily lead to local temperature exceeding the standard, affecting the lifespan and reliability of the power module. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency heat dissipation and dust prevention device for power distribution cabinets with adaptive heat generation adjustment, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency heat dissipation and dust prevention device for a power distribution cabinet, comprising a cabinet body, wherein a plurality of mounting plates are fixedly connected to the inner cavity of the cabinet body, an air pump is fixedly connected to the outer wall of the cabinet body, and a dust filter is fixedly connected to the air inlet end of the air pump, and further comprising: A targeted heat dissipation mechanism is located on the side wall of the cabinet, and several sets of the targeted heat dissipation mechanism are provided. A heat dissipation and dust removal mechanism, which is connected to a targeted heat dissipation mechanism; The targeted heat dissipation mechanism includes a medium cavity fixed to the top of the mounting plate, an exhaust pipe fixedly connected to the top of the medium cavity, the exhaust pipe fixedly penetrating the outer wall of the cabinet and having a heat dissipation cavity fixedly connected to its top, and a number of fins fixedly connected to the outer wall of the heat dissipation cavity.

[0007] Preferably, the targeted heat dissipation mechanism further includes a heat-conducting plate fixed to the side wall of the medium cavity, the heat-conducting plate being snapped onto the front side of the mounting plate.

[0008] Preferably, a sliding sleeve is fixedly connected to the top of the exhaust pipe, and an inclined rod is slidably connected to the inner cavity of the sliding sleeve, with the inclined surface of the inclined rod located at the bottom.

[0009] Preferably, a shift fork is fixedly connected to one side of the top of the inclined rod, and a counterweight box is fixedly connected to the other side of the inclined rod.

[0010] Preferably, the bottom of the counterweight box and the shift fork rod are both fixedly connected to a ring plate, and the ring plate is elastically connected to the sliding sleeve.

[0011] Preferably, the inner cavity of the counterweight box is provided with a counterweight block, the end of the shift fork is movably connected to a handle, the end of the handle is fixedly connected to a valve stem, and the end of the valve stem is fixedly connected to a valve core.

[0012] Preferably, the heat dissipation and dust removal mechanism includes a main vent pipe fixedly connected to the end of the air pump, and the side wall of the main vent pipe is fixedly connected to several primary air pipes.

[0013] Preferably, a secondary air tube is fixedly connected to the lower side of each of the primary air tubes, and an air blowing head is fixedly connected to the ends of both the secondary air tubes and the primary air tubes.

[0014] Preferably, both the valve stem and the valve core are rotatably connected to the inner cavity of the secondary gas pipe, which is located above the heat-conducting plate.

[0015] Preferably, a baffle plate is fixedly connected to the side of the cabinet cavity away from the air pump, an exhaust fan is fixedly connected to the top of the cabinet, a protective cover is provided above the exhaust fan, and the protective cover is fixedly connected to the outer wall of the cabinet.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention achieves adaptive adjustment of heat generation and cooling airflow by setting up a medium cavity, exhaust pipe, inclined rod, shift fork rod, valve stem, valve core, and secondary air pipe. When the IGBT module temperature rises, the low-boiling-point working fluid in the medium cavity vaporizes and expands. The steam pressure pushes the inclined rod upward, which drives the valve core to rotate through the shift fork rod and handle, proportionally increasing the opening of the secondary air pipe. This causes the cooling airflow blowing to the heat-generating components to automatically increase with the temperature rise. When the temperature drops, the steam condenses and contracts, the inclined rod returns to its original position, and the valve core opening automatically decreases. The response is rapid, and the adjustment accuracy is proportional to the heat generation, precisely solving the contradiction of insufficient heat dissipation for high-load components and excessive cooling for low-load components caused by traditional uniform air cooling.

[0017] This invention achieves flexible adjustment of the locking threshold and chip-level differentiated heat dissipation by setting up a combination of counterweights, ring plates, elastic elements, and multiple independently corresponding dielectric cavities. The number of counterweights in the counterweight box can be adapted to the heat dissipation characteristics of specific components, thereby adjusting the starting sensitivity of the inclined rod. At the same time, each dielectric cavity independently corresponds to an IGBT chip position, increasing the airflow only at the location of the chip with severe heat generation, automatically balancing the temperature difference between chips. This ensures accurate heat dissipation under different load conditions, avoids unnecessary energy consumption, significantly extends the overall service life of the power module, and improves the adaptability and reliability of the power distribution cabinet under complex dynamic conditions.

[0018] This invention achieves a dual heat dissipation path—local phase change-driven airflow regulation and global forced convection cooling—through the coordinated arrangement of structures such as exhaust pipes, heat dissipation chambers, fins, guide plates, and exhaust fans. When the hot steam formed by the vaporization of the working fluid rises in the exhaust pipe, some of the heat is pre-cooled to the outside by the heat dissipation chamber and fins. The uncondensed steam condenses and flows back within the heat dissipation chamber, completing the natural circulation of the working fluid. Simultaneously, the cooling airflow continuously provided by the air pump is targeted for heat dissipation by the air blower, and then, carrying heat, is guided by the guide plate to the exhaust fan for centralized discharge. This converts the heat generated by the heat source itself into the driving force for airflow regulation and utilizes the phase change of the working fluid to achieve remote heat transfer. This ensures heat dissipation efficiency in high power density scenarios and achieves synergistic optimization of dust prevention and heat dissipation, significantly improving the operational reliability of the power distribution cabinet in dusty environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the front section structure of the present invention; Figure 3 This is a schematic diagram of the side cross-section structure of the present invention; Figure 4 This is a schematic diagram showing the structural fit between the exhaust pipe and the inclined rod of the present invention; Figure 5 This is a schematic diagram showing the structural relationship between the primary and secondary trachea of ​​the present invention; Figure 6 For the present invention Figure 5 A magnified view of the structure at point A in the middle; Figure 7 This is a schematic diagram showing the structural fit between the secondary air tube and the valve core of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the structure at point B in the middle; Figure 9 This is a schematic diagram showing the structural fit between the exhaust pipe and the medium cavity of the present invention.

[0020] In the picture: 100. Cabinet; 200. Mounting plate; 300. Air pump; 400. Dust filter; 500. Targeted heat dissipation mechanism; 510. Exhaust pipe; 520. Heat dissipation cavity; 530. Fins; 540. Heat conduction plate; 550. Medium cavity; 560. Inclined rod; 570. Valve stem; 580. Handle; 590. Shift fork rod; 5100. Counterweight box; 5110. Counterweight block; 5120. Ring plate; 5130. Sliding sleeve; 5140. Valve core; 600. Heat dissipation and dust removal mechanism; 610. Guide plate; 620. Exhaust fan; 630. Protective cover; 640. Main vent pipe; 650. Primary air pipe; 660. Air blower head; 670. Secondary air pipe. Detailed Implementation

[0021] 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.

[0022] like Figures 1 to 9 As shown, the present invention provides a high-efficiency heat dissipation and dust prevention device for a power distribution cabinet, including a cabinet 100, a plurality of mounting plates 200 fixedly connected to the inner cavity of the cabinet 100, an air pump 300 fixedly connected to the outer wall of the cabinet 100, and a dust filter 400 fixedly connected to the air inlet end of the air pump 300, and further including: A targeted heat dissipation mechanism 500 is located on the side wall of the cabinet 100, and several sets of the targeted heat dissipation mechanism 500 are provided. Heat dissipation and dust removal mechanism 600, which is connected to targeted heat dissipation mechanism 500; The targeted heat dissipation mechanism 500 includes a medium cavity 550 fixedly attached to the top of the mounting plate 200. The top of the medium cavity 550 is fixedly connected to an exhaust pipe 510, which is fixedly connected through the outer wall of the cabinet 100. The top of the exhaust pipe 510 is also fixedly connected to a heat dissipation cavity 520, and a number of fins 530 are fixedly attached to the outer wall of the heat dissipation cavity 520.

[0023] The above solution is adopted: the side wall of the cabinet 100 is provided with several sets of targeted heat dissipation mechanisms 500. Each set of targeted heat dissipation mechanisms 500 includes a medium cavity 550 fixedly connected to the top of the corresponding mounting plate 200. The top of the medium cavity 550 is fixedly connected to an exhaust pipe 510. The exhaust pipe 510 is fixedly penetrated through the outer wall of the cabinet 100, and the top of the exhaust pipe 510 is fixedly connected to a heat dissipation cavity 520. Several fins 530 are fixedly connected to the outer wall of the heat dissipation cavity 520. The heat dissipation and dust removal mechanism 600 is connected to the targeted heat dissipation mechanism 500. The air pump 300 sends the air filtered by the dust filter 400 into the heat dissipation and dust removal mechanism 600. The heat dissipation and dust removal mechanism 600 then directs the cooling airflow to the heat-generating components on each mounting plate 200. At the same time, the working fluid in the medium cavity 550 is heated and vaporized, and then enters the heat dissipation cavity 520 through the exhaust pipe 510. It dissipates heat to the outside through the fins 530, thus forming a complete heat dissipation path from the heat source to the external environment.

[0024] like Figures 4 to 9 As shown, the targeted heat dissipation mechanism 500 also includes a heat-conducting plate 540 fixed to the side wall of the medium cavity 550, and the heat-conducting plate 540 is snapped to the front side of the mounting plate 200; the top of the exhaust pipe 510 is fixedly connected to a sliding sleeve 5130, and the inner cavity of the sliding sleeve 5130 is slidably connected to an inclined rod 560, and the inclined surface of the inclined rod 560 is set at the bottom; a shift fork rod 590 is fixedly connected to one side of the top of the inclined rod 560, and a counterweight box 5100 is fixedly connected to the other side of the inclined rod 560; a ring plate 5120 is fixedly connected to the bottom of the counterweight box 5100 and the shift fork rod 590, and the ring plate 5120 and the sliding sleeve 5130 are elastically connected to each other; a counterweight block 5110 is provided in the inner cavity of the counterweight box 5100, and a handle 580 is movably connected to the end of the shift fork rod 590, a valve stem 570 is fixedly connected to the end of the handle 580, and a valve core 5140 is fixedly connected to the end of the valve stem 570.

[0025] The above-mentioned scheme employs an electronic fluorinated liquid as the driving medium, such as FS48 electronic coolant, which has a boiling point of 60℃, a latent heat of phase change of 126kJ / kg, good environmental parameters (ODP=0, GWP<150), and has been practically applied to the direct cooling of IGBT modules in electric vehicles. Furthermore, FS48 electronic fluorinated liquid has extremely high dielectric strength, ensuring that even accidental leakage into electrical components will not cause a short circuit. The normal junction temperature range of IGBTs is between 60℃ and 85℃, making it suitable. As the temperature rises, heat is rapidly transferred to the medium cavity 550 via the heat-conducting plate 540. The low-boiling-point working medium in the medium cavity 550 absorbs heat and reaches its boiling point, beginning to boil and vaporize. The resulting vapor pressure pushes the working medium upwards into the exhaust pipe 510. As the temperature rises further, the steam pressure in the exhaust pipe 510 gradually increases. The steam acts on the inclined surface at the bottom of the inclined rod 560, overcoming the weight of the counterweight box 5100 and the inclined rod 560 itself, pushing the inclined rod 560 upward along the sliding sleeve 5130. The higher the temperature, the greater the steam pressure, and the greater the upward distance the inclined rod 560 moves. When the inclined rod 560 moves upward, it drives the shift fork rod 590 fixed to one side of its top to move upward simultaneously. The end of the shift fork rod 590 is movably connected to the handle 580, thereby lifting the handle 580 upward. The lifting motion of the handle 580 is converted into the rotational motion of the valve stem 570. The valve stem 570 drives the valve core 5140 to rotate within the secondary air pipe 670, increasing the ventilation cross-section of the secondary air pipe 670. The higher the temperature, the greater the rotation angle of the valve core 5140, the greater the opening of the secondary air pipe 670, and the cooling air volume sprayed from the air blower 660 to the heating element also increases proportionally. This process responds rapidly and is directly proportional to the heat generated, precisely resolving the contradiction of insufficient heat dissipation for high-load components and excessive cooling for low-load components caused by uniform air cooling. The number of counterweights 5110 within the counterweight box 5100 can be adapted to the rated power and allowable temperature rise of specific components. Increasing the counterweights 5110 raises the activation threshold of the inclined rod 560, allowing the valve core 5140 to open significantly only at higher temperatures, thus adapting to scenarios with different heat dissipation requirements. Simultaneously, multiple dielectric cavities 550 independently correspond to different IGBT chip locations. When a chip generates a higher heat flux density due to process deviations or aging, the working fluid in its corresponding dielectric cavity 550 vaporizes more violently, the valve core 5140 opens more fully, and the airflow allocated to that chip increases accordingly, automatically balancing the temperature differences between chips. Compared to traditional air cooling, this represents a fundamental shift from uniform air cooling to on-demand distribution, significantly improving the overall lifespan of the power module.

[0026] like Figures 2 to 5As shown, the heat dissipation and dust removal mechanism 600 includes a main air pipe 640 fixedly connected to the end of the air pump 300, and a number of primary air pipes 650 fixedly connected to the side wall of the main air pipe 640; secondary air pipes 670 are fixedly connected to the lower side of each of the primary air pipes 650, and air blowing heads 660 are fixedly connected to the ends of the secondary air pipes 670 and the primary air pipes 650; valve stem 570 and valve core 5140 are rotatably connected to the inner cavity of the secondary air pipe 670, and the secondary air pipe 670 is located above the heat conduction plate 540; a guide plate 610 is fixedly connected to the side of the inner cavity of the cabinet 100 away from the air pump 300, an exhaust fan 620 is fixedly connected to the top of the cabinet 100, a protective cover 630 is provided above the exhaust fan 620, and the protective cover 630 is fixedly connected to the outer wall of the cabinet 100.

[0027] The above scheme is adopted as follows: During the heat dissipation process, external air is filtered by the dust filter 400 and enters the main vent pipe 640, then splits into the primary air pipes 650 and secondary air pipes 670, and finally sprays out from the blower head 660. At this time, the blower head 660 of the primary air pipe 650 blows and dissipates heat from the front of ordinary components, while using continuous airflow to form a dynamic air film on the surface of the components, effectively preventing dust adhesion. For high-temperature heat-generating components mounted on the mounting plate 200, especially IGBT modules, the blower head 660 of the secondary air pipe 670 is specifically aimed at their back or side areas, providing adjustable cooling and blowing. The exhaust fan 620 at the top of the cabinet 100 operates continuously, guiding the hot air inside the cabinet upwards, and then discharging it after rectification by the guide plate 610. During this stage, the working fluid in each medium cavity 550 is in a liquid state, and there is no steam pressure in the exhaust pipe 510. Under the combined action of its own weight and the counterweight 5110 inside the counterweight box 5100, the bottom end of the inclined rod 560 abuts against the lower inner wall of the exhaust pipe 510, and is stabilized by the elastic element between the ring plate 5120 and the sliding sleeve 5130. At this time, the handle 580, which is movably connected to the shift fork rod 590, is in the lowest position, and the valve core 5140 opens the secondary air pipe 670 to a small initial opening, so that the secondary air pipe 670 only provides basic dustproof airflow. This initial opening design avoids energy waste caused by excessive cooling under low load, and also ensures that a small amount of airflow always passes over the surface of the components in the standby state, preventing dust accumulation. As can be seen, the air pump 300, dust filter 400, main air pipe 640, primary air pipe 650 and secondary air pipe 670 form a graded air supply network, while the medium cavity 550, exhaust pipe 510, inclined rod 560, counterweight box 5100 and valve core 5140 constitute a standby temperature sensing and regulation unit. All structures work together to maintain a low energy consumption and basic dust prevention balance at room temperature.

[0028] Working principle and usage process of this invention: First, the air pump 300 is started. Outside air, filtered by the dust filter 400, enters the main air duct 640, then is distributed to the primary air ducts 650 and secondary air ducts 670, and finally sprayed out from the air blower 660. At this time, the air blower 660 of the primary air duct 650 blows and dissipates heat from ordinary components while preventing dust from adhering. For high-temperature heat-generating components mounted on the mounting plate 200, especially IGBT modules, the air blower 660 of the secondary air duct 670 provides targeted adjustable cooling and blowing. The exhaust fan 620 on the top of the cabinet 100 runs continuously, guiding the hot air inside the cabinet upwards, which is then rectified by the guide plate 610 and discharged. The protective cover 630 prevents foreign objects from falling. During this stage, the working fluid in each medium cavity 550, such as electronic fluorinated liquid FS48, is in a liquid state. There is no vapor pressure in the exhaust pipe 510. Under the action of its own weight and the counterweight 5110 in the counterweight box 5100, the bottom end of the inclined rod 560 abuts against the lower inner wall of the exhaust pipe 510, and is kept stable by the elastic element between the ring plate 5120 and the sliding sleeve 5130. At this time, the handle 580, which is movably connected to the shift fork rod 590, is in the lowest position. The valve core 5140 opens the secondary gas pipe 670 to a small initial opening, so that the secondary gas pipe 670 only provides basic dustproof airflow, avoiding excessive cooling and energy waste under low load.

[0029] Secondly, when the load on an IGBT module or high-heat-generating component on a mounting plate 200 increases and the temperature rises, heat is rapidly transferred to the medium cavity 550 via the heat-conducting plate 540. The low-boiling-point working fluid in the medium cavity 550 absorbs heat and reaches its boiling point, beginning to boil and vaporize. The resulting steam pressure pushes the working fluid upward into the exhaust pipe 510. As the temperature further increases, the steam pressure in the exhaust pipe 510 gradually increases. The steam acts on the inclined surface at the bottom of the inclined rod 560, overcoming the weight of the counterweight box 5100 and the inclined rod 560 itself, pushing the inclined rod 560 upward along the sliding sleeve 5130. The higher the temperature, the greater the steam pressure, and the greater the upward distance the inclined rod 560 moves. When the inclined rod 560 moves upward, it drives the shift fork rod 590, which is fixed to one side of its top, to move upward simultaneously. The end of the shift fork rod 590 is movably connected to the handle 580, thereby lifting the handle 580 upward. The lifting motion of handle 580 is converted into the rotational motion of valve stem 570. Valve stem 570 drives valve core 5140 to rotate within secondary air pipe 670, increasing the ventilation cross-section of secondary air pipe 670. The higher the temperature, the greater the rotation angle of valve core 5140, the greater the opening of secondary air pipe 670, and the cooling air volume sprayed from air head 660 to heat-generating components increases proportionally. This process is rapid and proportional to the heat generated, precisely resolving the contradiction of insufficient heat dissipation for high-load components and excessive cooling for low-load components caused by uniform air cooling. Furthermore, the number of counterweights 5110 can be adapted to the specific components.

[0030] Secondly, when the component temperature drops below the boiling point of the working fluid, the steam in the dielectric chamber 550 and the exhaust pipe 510 gradually condenses and contracts, causing a decrease in steam pressure. Under the combined action of the weight of the counterweight box 5100, its own weight, and the restoring force of the elastic element at the ring plate 5120, the inclined rod 560 slides downwards along the sliding sleeve 5130 to reset. During the downward movement of the inclined rod 560, the shift fork rod 590 descends accordingly, the handle 580 is pulled back to its initial low position, and the valve rod 570 rotates in the opposite direction, causing the valve core 5140 to reduce the opening of the secondary air pipe 670, restoring it to a micro-ventilation state. This reverse linkage ensures that the heat dissipation airflow is automatically adjusted according to actual needs, avoiding unnecessary energy consumption, and is especially suitable for scenarios such as IGBT modules where multiple chips are connected in parallel and the heat dissipation of each chip is uneven. Each dielectric chamber 550 independently corresponds to a chip position, increasing the airflow only at the location of the chip with severe heat generation, achieving chip-level differentiated heat dissipation, automatically balancing the temperature differences between chips, and significantly extending the overall service life of the power module.

[0031] Finally, the hot steam formed after the working fluid vaporizes enters the exhaust pipe 510. Part of the heat is conducted through the pipe wall to the heat dissipation cavity 520 outside the cabinet 100, where it exchanges heat with the outside air via the fins 530, achieving pre-cooling. The steam that is not completely condensed eventually condenses and flows back into the heat dissipation cavity 520, returning to the medium cavity 550 along the inner wall of the exhaust pipe 510, completing the natural circulation of the working fluid. Simultaneously, the cooling airflow continuously provided by the air pump 300, after targeted heat dissipation of the components, carries heat upwards and is guided by the guide plate 610 to the exhaust fan 620 for centralized discharge from the cabinet 100, forming a dual heat dissipation path of local phase change-driven airflow regulation and global forced convection cooling. The entire system converts the heat generated by the heat source itself into the driving force for airflow regulation through mechanical structure. At the same time, it uses the phase change of the working fluid to realize the remote transfer and dissipation of heat, which not only ensures the heat dissipation efficiency in high power density scenarios, but also achieves the synergistic optimization of dust prevention and heat dissipation, significantly improving the operational reliability of the power distribution cabinet in dusty environments.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency heat dissipation and dust prevention device for a power distribution cabinet, comprising a cabinet (100), wherein a plurality of mounting plates (200) are fixedly connected to the inner cavity of the cabinet (100), and an air pump (300) is fixedly connected to the outer wall of the cabinet (100), and a dust filter (400) is fixedly connected to the air inlet end of the air pump (300), characterized in that: Also includes: A targeted heat dissipation mechanism (500) is located on the side wall of the cabinet (100), and several sets of the targeted heat dissipation mechanism (500) are provided. A heat dissipation and dust removal mechanism (600) is connected to a targeted heat dissipation mechanism (500); The targeted heat dissipation mechanism (500) includes a medium cavity (550) fixed to the top of the mounting plate (200), the top of the medium cavity (550) is fixedly connected to an exhaust pipe (510), the exhaust pipe (510) is fixedly penetrated through the outer wall of the cabinet (100), and the top is fixedly connected to a heat dissipation cavity (520), and the outer wall of the heat dissipation cavity (520) is fixedly connected to a number of fins (530).

2. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 1, characterized in that: The targeted heat dissipation mechanism (500) also includes a heat-conducting plate (540) fixed to the side wall of the medium cavity (550), and the heat-conducting plate (540) is snapped to the front side of the mounting plate (200).

3. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 2, characterized in that: The top of the exhaust pipe (510) is fixedly connected to a sliding sleeve (5130), and the inner cavity of the sliding sleeve (5130) is slidably connected to an inclined rod (560), with the inclined surface of the inclined rod (560) located at the bottom.

4. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 3, characterized in that: A fork rod (590) is fixedly connected to one side of the top of the inclined rod (560), and a counterweight box (5100) is fixedly connected to the other side of the inclined rod (560).

5. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 4, characterized in that: The bottom of the counterweight box (5100) and the shift fork (590) are both fixedly connected to a ring plate (5120), and the ring plate (5120) is elastically connected to the sliding sleeve (5130).

6. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 5, characterized in that: The inner cavity of the counterweight box (5100) is provided with a counterweight block (5110), and the end of the shift fork (590) is movably connected to a handle (580). The end of the handle (580) is fixedly connected to a valve stem (570), and the end of the valve stem (570) is fixedly connected to a valve core (5140).

7. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 6, characterized in that: The heat dissipation and dust removal mechanism (600) includes a main air pipe (640) fixedly connected to the end of the air pump (300), and the side wall of the main air pipe (640) is fixedly connected to several primary air pipes (650).

8. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 7, characterized in that: Each of the primary air tubes (650) is fixedly connected to a secondary air tube (670) on its lower side, and both the secondary air tubes (670) and the primary air tubes (650) are fixedly connected to an air blowing head (660).

9. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 8, characterized in that: The valve stem (570) and valve core (5140) are both rotatably connected to the inner cavity of the secondary air pipe (670), which is located above the heat-conducting plate (540).

10. The high-efficiency heat dissipation and dust prevention device for power distribution cabinets according to claim 1, characterized in that: A guide plate (610) is fixedly connected to the side of the inner cavity of the cabinet (100) away from the air pump (300). An exhaust fan (620) is fixedly connected to the top of the cabinet (100). A protective cover (630) is provided above the exhaust fan (620) and is fixedly connected to the outer wall of the cabinet (100).

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