A wind power converter cooling device

Abstract

This invention discloses a cooling device for a wind power converter, relating to the field of wind power converter heat dissipation technology. The cooling device includes a cooling shell, a buffer plate disposed inside the cooling shell, a perforated frame disposed between the buffer plate and a movable door, multiple rotating fan rings rotatably disposed on the buffer plate, a side spray box connected to the surface of the buffer plate, a dust collection box connected to the air inlet pipe of the cooling shell, a filter assembly disposed in the dust collection box, and a cleaning mechanism disposed on the side of the dust collection box. This invention uses the perforated frame to install inverter components while maintaining airflow space at the bottom of the components. It achieves disordered airflow guidance and multi-directional blowing through the rotating fan rings and side spray box. The filter assembly and cleaning mechanism work together to ensure a long-lasting filtration effect. The heat dissipation outer shell and atomizing components achieve intake air cooling and spray-assisted cooling, effectively solving the problems of poor heat dissipation, easy clogging of filters, and insufficient cooling capacity in high-temperature environments found in existing cooling devices.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment technology, and more specifically to a wind power converter cooling device. Background Technology

[0002] Wind power converters typically consist of functional components such as circuit breakers, contactors, power unit modules, and filter modules, all housed within a converter cabinet. During operation, the power modules (especially IGBT modules) generate significant heat. If this heat cannot be dissipated promptly, the chip junction temperature may exceed a threshold, potentially causing overheating damage and directly threatening the stability of the wind power converter. Therefore, the performance of the cooling system directly impacts the safe operation and lifespan of the converter.

[0003] Currently, air cooling is one of the most widely used heat dissipation methods for wind power converters. Existing cooling devices typically use fans to draw cool external air into the cabinet for heat dissipation. The installation method of components inside the converter cabinet also has a significant impact on heat dissipation. In existing converter cabinets, components are usually directly mounted on the back panel or bottom panel, with the back of the components tightly attached to the cabinet wall. This obstructs airflow, causing heat to accumulate between the components and the cabinet wall, forming localized hot spots.

[0004] Furthermore, wind power converters typically operate in outdoor or industrial environments where the air contains significant amounts of dust. While existing cooling systems include filters at the air inlet, these filters are prone to clogging after prolonged use, affecting airflow and reducing heat dissipation efficiency. Under high-temperature conditions, relying solely on air convection for cooling is insufficient to meet the cooling requirements of high-power converters.

[0005] In summary, existing wind power converter cooling devices have varying degrees of shortcomings in terms of airflow direction adjustment, internal component installation layout, inlet dust filtration, and cooling capacity under high-temperature environments. There is an urgent need for an improved cooling device that can comprehensively solve the above problems. Summary of the Invention

[0006] To address the technical problems in existing wind power converter cooling devices, such as unreasonable installation layout of components inside the cabinet leading to poor airflow, easy clogging of filters affecting heat dissipation efficiency, and difficulty in meeting cooling requirements by air convection alone in high-temperature environments, this invention provides a wind power converter cooling device.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0008] A cooling device for a wind power converter includes a cooling shell, a buffer partition disposed inside the cooling shell, a perforated frame disposed between the buffer partition and a movable door of the cooling shell, a plurality of rotating fan rings rotatably disposed on the buffer partition, a side spray box connected to the surface of the buffer partition, a dust removal box connected to the air inlet pipe of the cooling shell, a filter assembly disposed in the dust removal box, a cleaning mechanism disposed on the side of the dust removal box, a heat dissipation outer box sleeved on the outside of the air inlet pipe, a return pipe connecting the exhaust port of the cooling shell and the air inlet end of the heat dissipation outer box, and an atomizing element disposed on the cooling shell for spraying water mist into the return pipe.

[0009] Furthermore, the hollow frame has multiple connection holes for assisting in the installation of inverter parts. When installing inverter parts, simply use bolts to fix the parts to the hollow frame through the connection holes. This makes disassembly and assembly convenient. The bottom of the installed parts also retains sufficient airflow space to ensure that heat can be dissipated smoothly.

[0010] Furthermore, the buffer partition is equipped with multiple rotating fan rings. When the airflow passes through the rotating fan rings, the blades on the rotating fan rings can drive themselves to rotate while guiding the airflow in all directions, so that the airflow blows randomly towards the bottom of the hollow frame, so as to remove the heat from the surface of the part. The buffer partition surfaces on both sides of the hollow frame are connected to side spray boxes. The side spray boxes are equipped with multiple air jet slots on the side facing the hollow frame, which can generate cooling airflow at the bottom and sides of the part, further reducing the cooling dead zone.

[0011] Furthermore, an air intake pipe is located at the air inlet position on the back of the cooling shell, with the other end of the air intake pipe connected to the dust collector. The dust collector contains a filter assembly, and the air intake end of the dust collector has an air intake pipe with a blower for blowing air. The filter assembly includes a rotating shaft inside the dust collector, on which a rotating disk seat rotatably rotates. A sealing ring is provided between the outer side of the rotating disk seat and the inner wall of the air intake pipe, and a filter screen is arranged on the rotating disk seat. An extension pipe extending to the vicinity of the filter screen is located at the end of the air intake pipe. The extension pipe is coaxial with the air intake pipe, and its diameter is smaller than that of the air intake pipe. An upper baffle is arranged below the extension pipe, with its end flush with the end of the extension pipe, which divides the inner cavity of the dust collector into upper and lower chambers, reducing downward airflow from the upper side. A collection device is located at the bottom of the dust collector to collect the cleaned impurities.

[0012] Furthermore, the surface of the dust collector box below the upper partition is equipped with a cleaning mechanism for backflushing the filter screen. The cleaning mechanism includes a cleaning notch on the side of the dust collector box, the notch being covered by a cleaning box, the area of ​​which is smaller than the exhaust port area of ​​the dust collector box. The air inlet of the cleaning box is connected to the backflushing guide pipe. A heat dissipation outer casing is fitted around the air inlet pipe, and heat exchange fins are distributed on the outside of the air inlet pipe to increase the heat exchange area. Multiple exhaust ports are distributed on the outside of the cooling outer casing, each exhaust port being connected to the air inlet of the heat dissipation outer casing via a return pipe, and the exhaust end of the heat dissipation outer casing being connected to the air inlet of the backflushing guide pipe. In actual operation, the airflow in the cooling outer casing is discharged along the return pipe into the heat dissipation outer casing. This carries away heat from the outside of the air inlet pipe, further cooling the airflow entering the cooling outer casing and improving the heat dissipation effect. The connection section between the air inlet pipe and the dust collector box is a conical structure; the airflow is compressed as it flows along the conical channel, increasing its temperature. When the airflow is ejected along the air inlet pipe, it expands and does work, lowering its own temperature and further improving the heat dissipation effect. After the airflow enters the cleaning box along the backflush guide pipe, the airflow backflushes the surface of the filter screen and cleans the holes in the filter screen in the lower area, ensuring the overall filtration effect of the equipment.

[0013] Furthermore, a cleaning roller is vertically installed in the cleaning box, with its lower end rotatably mounted to the cleaning box. The cleaning roller has a hollow structure, and its bottom air inlet is rotatably connected to the end of the backflushing guide pipe. Multiple air jet holes are distributed on the outer side of the cleaning roller, with the exhaust axis of each hole forming an acute angle with the tangential surface of the cleaning roller. The reaction force generated by the airflow exiting along the air jet holes creates a rotational torque, causing the cleaning roller to rotate rapidly. Multiple brushes are distributed on the outer side of the cleaning roller, cleaning the filter screen surface and matching the backflushing airflow for better hole cleaning. A rotary transmission component that drives the rotating shaft is located at the upper end of the cleaning roller.

[0014] Furthermore, a sliding component is provided between the rotating shaft and the rotating disk base. This component ensures that the filter screen surface does not initially contact the brush; the brush only contacts the filter screen surface when it becomes severely clogged, preventing unnecessary wiping. The sliding component includes an auxiliary sliding sleeve located at the center of the rotating disk base, a guide protrusion on the rotating shaft surface, a sliding groove matching the guide protrusion on the inner wall of the auxiliary sliding sleeve, and a rotating ring at the end of the rotating shaft. The rotating ring and the auxiliary sliding sleeve are connected by a trigger spring. Initially, the filter screen surface is open, and the filter screen surface does not contact the brush under the pressure of the rotating ring. As filtration time increases, when the backflushing action fails to clean the holes, the wind resistance generated by the filter screen surface increases. Under the thrust of the wind, the rotating disk base slides along the rotating shaft, bringing the filter screen surface into contact with the brush surface. The brush then assists in backflushing, optimizing the cleaning effect.

[0015] Furthermore, the rotary transmission component includes a second gear disposed at the end of the rotating shaft, and a transmission shaft coaxially disposed at the upper end of the cleaning roller. A first gear is fixedly disposed at the upper end of the transmission shaft, and the first gear and the second gear mesh with each other. When the cleaning roller rotates rapidly, the first gear at the end of the transmission shaft drives the second gear to rotate, and the second gear drives the rotating shaft and the rotating disk to rotate, thereby causing the filtration area on the filter screen to continuously switch to the cleaning area.

[0016] Furthermore, the collecting component includes a slag discharge pipe located at the bottom of the dust collector, with a detachable collecting cylinder at the lower end of the slag discharge pipe. The surface of the collecting cylinder has multiple air vents, allowing airflow to discharge impurities along the slag discharge pipe, where the impurities are collected by the collecting cylinder. A guide arc plate is installed in the dust collector above the slag discharge pipe to guide the backflow airflow toward the slag discharge pipe, preventing airflow turbulence.

[0017] Furthermore, the cooling housing is also equipped with an atomizing element for spraying water mist into the return pipe. This atomizing element increases the water mist on the surface of the heat exchange fins, and the evaporation of the water mist carries away heat from the surface of the heat exchange fins, further reducing the air temperature passing through the intake pipe and helping to improve the cooling effect of the equipment. The atomizing element includes a first guide sleeve disposed on the surface of the cooling housing, a trigger rod slidably disposed within the first guide sleeve, guide units on both sides of the trigger rod, and the upper end of the trigger rod passing through a second guide sleeve outside the return pipe. The cooling housing is equipped with an atomizing water tank, and a fixed water guide pipe is disposed at the outlet end of the atomizing water tank. The other end of the fixed water guide pipe passes through the return pipe, and a nozzle assembly is disposed at the end of the fixed water guide pipe located inside the return pipe. The lower end of the trigger rod extends into the interior of the cooling housing, and a thermal expansion block is disposed at the bottom of the trigger rod. A pressure wheel is rotatably disposed at the extension end of the thermal expansion block, and multiple protrusions are distributed in an array on the outer side of the rotating fan ring. When the internal temperature of the cooling housing is within a reasonable range, the pressure roller is not subjected to any force. When the internal temperature of the cooling housing exceeds the set value, the thermal expansion block expands, pushing the pressure roller towards the rotating fan ring. At this time, the protrusion intermittently exerts a thrust on the pressure roller, triggering the push rod to intermittently press against the nozzle assembly, thus initiating the water spraying action to prepare for cooling. As the expansion amplitude of the thermal expansion block increases, the squeezing amplitude of the push rod against the nozzle assembly also increases, increasing the spray volume and automatically improving the cooling effect.

[0018] Furthermore, the nozzle assembly includes a piston cylinder connected to a fixed water guide pipe. A one-way drain valve is provided between the piston cylinder and the fixed water guide pipe. A piston block is slidably mounted inside the piston cylinder, and the piston block is connected to the bottom of the piston cylinder via a return spring. A trigger block corresponding to the trigger rod is located at the lower end of the piston block. Multiple circumferential nozzles are arrayed on the outer side of the piston cylinder. When the top of the trigger rod exerts a pushing force on the trigger block, the piston block squeezes the water chamber along the inner wall of the piston cylinder, and the water inside the piston cylinder is sprayed out along the circumferential nozzles, completing the spraying operation.

[0019] Furthermore, the guide unit includes crossbars symmetrically arranged on both sides of the trigger rod. A reset sleeve is provided at the end of each crossbar, and a reset guide rod slides on the reset sleeve. The bottom of the reset guide rod is connected to the cooling housing, and the reset sleeve and the cooling housing are connected by a reset spring. When the trigger rod moves up and down, the reset sleeve slides along the reset guide rod, making the sliding smoother, and the reset spring assists the trigger rod in resetting.

[0020] The present invention has the following beneficial effects:

[0021] In this invention, a hollow frame is set between the buffer partition and the movable door, and connection holes are opened on the hollow frame. The inverter parts are installed on the hollow frame by bolts. Sufficient airflow space is reserved at the bottom of the parts, which avoids the problem of heat accumulation caused by the back of the parts being tightly attached to the cabinet wall in the traditional installation method, and effectively eliminates local hot spots.

[0022] This invention achieves multi-directional three-dimensional cooling of the bottom and sides of parts by setting up a rotating fan ring and a side spray box. The rotating fan ring automatically rotates as airflow passes through and guides the airflow randomly in all directions. The side spray box generates cooling airflow from the side, which greatly reduces cooling dead angles and improves heat dissipation uniformity.

[0023] This invention, by setting up a filter assembly and a cleaning mechanism, uses a back-blowing guide pipe to introduce the airflow discharged from the cooling shell into the cleaning box to back-blow and clean the filter screen surface. Combined with the brush on the cleaning roller to clean the filter screen surface, it effectively solves the problem of filter screen clogging after long-term use, ensuring the equipment's long-lasting filtration effect and air intake.

[0024] This invention provides a sliding element between the rotating shaft and the rotating disc base, ensuring that the filter screen only comes into contact with the brush when it is severely clogged. This avoids unnecessary wiping of the filter screen and extends its service life.

[0025] This invention improves heat dissipation by setting up a heat dissipation outer casing and a conical intake pipe connection section, using the airflow discharged from the cooling outer casing to pre-cool the intake pipe, and at the same time using the Joule-Thomson effect of the airflow being compressed and then expanded after passing through the conical channel to further reduce the intake temperature. The dual cooling method improves the heat dissipation effect.

[0026] This invention incorporates an atomizing component and utilizes a thermal expansion block to sense the internal temperature of the cooling shell. When the temperature is too high, the nozzle assembly is automatically triggered to spray water into the return pipe. The water mist evaporates on the surface of the heat exchange fins, carrying away heat. This achieves intelligent cooling by automatically adjusting the spray volume according to the temperature, effectively improving the cooling capacity in high-temperature environments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of one side of the cooling device for the wind power converter of the present invention;

[0028] Figure 2 This is a schematic diagram of the other side of the cooling device for the wind power converter of the present invention;

[0029] Figure 3 In this invention Figure 2 A schematic diagram of the structure of D in the middle;

[0030] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure on the other side of the interior of the present invention;

[0032] Figure 6 For the present invention Figure 4 Structural diagram of A in the middle;

[0033] Figure 7 For the present invention Figure 5 A schematic diagram of the structure of C;

[0034] Figure 8 This is a structural diagram of the rotating disk base in this invention;

[0035] Figure 9 This is a structural diagram of the cleaning roller in this invention;

[0036] Figure 10 This is a schematic diagram illustrating the cooperation between the thermal expansion block and the protrusion block in this invention;

[0037] Figure 11 This is a schematic diagram showing the nozzle assembly and the trigger rod not in contact in this invention;

[0038] Figure 12 This is a schematic diagram of the nozzle assembly in this invention.

[0039] In the diagram: Cooling shell 100, movable door 101, return pipe 102, heat dissipation box 103, dust removal box 104, air inlet pipe 105, blower 106, slag discharge pipe 107, collection cylinder 108, backflush guide pipe 109;

[0040] Atomizing water tank 200, first guide sleeve 201, reset spring 202, reset sliding sleeve 203, reset guide rod 204, piston cylinder 205, cross rod 206, nozzle assembly 207, trigger rod 208, second guide sleeve 209, protrusion block 210, pressure roller 211, thermal expansion block 212, fixed water guide pipe 213, circumferential nozzle 214, return spring 215, piston block 216, trigger block 217;

[0041] Rotating disc base 300, filter screen 301, extension tube 302, rotating shaft 303, guide arc plate 304, cleaning roller 305, brush 306, air jet hole 307, transmission shaft 308, first gear 309, second gear 310, upper partition 311, guide protrusion 312, rotating ring 313, auxiliary sliding sleeve 314, trigger spring 315, cleaning box 316;

[0042] Buffer partition 400, rotating fan ring 401, side spray box 402, hollow frame 403, connecting hole 404;

[0043] Air intake pipe 501, heat exchange fins 502. Detailed Implementation

[0044] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0045] like Figures 1 to 12 As shown, the present invention provides a cooling device for a wind power converter, including a cooling housing 100. The cooling housing 100 has a rectangular cabinet structure, with multiple support feet evenly arranged at its lower end to stably support the cooling housing 100 on the mounting base surface. This also creates a heat dissipation gap between the bottom of the cooling housing 100 and the mounting base surface, facilitating airflow and heat dissipation at the bottom. The front of the cooling housing 100 has a movable door 101. One side of the movable door 101 is hinged to the side wall of the cooling housing 100, and the other side is connected to the cooling housing 100 via a latch, allowing for easy opening and closing of the movable door 101 for inspection, replacement, or cleaning of internal components during routine maintenance.

[0046] A buffer partition 400 is installed inside the cooling housing 100. The buffer partition 400 is fixedly installed horizontally in the middle or lower middle part of the inner cavity of the cooling housing 100, dividing the inner cavity of the cooling housing 100 into upper and lower areas. A perforated frame 403 is arranged between the buffer partition 400 and the movable door 101. The perforated frame 403 has a grid-like or mesh structure, and its upper surface has multiple connection holes 404 for assisting in the installation of inverter-related components. When the component is fixed on the perforated frame 403, the bottom of the component is not tightly attached to the solid plate surface, but a sufficient airflow space is maintained between the component and the perforated frame 403. This space forms an airflow channel, allowing the cooling airflow to flow smoothly over the lower surface and sides of the component, avoiding the heat accumulation problem caused by the back of the component being tightly attached to the cabinet wall in traditional installation methods. This ensures that heat can be smoothly carried away by the airflow, thereby effectively eliminating the generation of local hot spots.

[0047] Multiple rotating fan rings 401 are rotatably mounted on the buffer partition 400. The specific number of rotating fan rings 401 can be reasonably selected according to the width of the cooling shell 100 and the actual heat dissipation requirements, for example, three, four, or five. In this embodiment, four are preferred. The four rotating fan rings 401 are arranged at equal intervals along the length of the buffer partition 400. Each rotating fan ring 401 has a circular or fan-shaped structure, with multiple blades fixed on its inner or outer ring. The blades are arranged in a circular array around the central axis of the rotating fan ring 401, and airflow channels are formed between adjacent blades. When the cooling airflow passes through the rotating fan ring 401 from the bottom to the top of the buffer partition 400, the airflow impacts the blade surface and generates a tangential force on the blade under the action of airflow pressure. This tangential force drives the rotating fan ring 401 to rotate continuously around its own central axis. During the rotation, the blades cut and guide the airflow, causing the airflow that originally flowed in roughly one direction to be decomposed into multiple streams with different directions, which then diffuse in a disordered state in all directions. This disordered guiding effect allows the airflow to blow towards the bottom of the hollow frame 403 and the various surfaces of the parts mounted on the hollow frame 403 at multiple angles and directions, greatly increasing the contact area and contact opportunities between the airflow and the surface of the parts, thereby significantly improving the convective heat transfer efficiency and enabling the heat generated on the surface of the parts to be carried away more fully.

[0048] On both sides of the perforated frame 403, the surface of the buffer partition 400 is also connected to a side spray box 402. The side spray box 402 has a long strip-shaped box structure, and its length direction is parallel to the side of the perforated frame 403. Multiple air jet slots are opened on the side wall of the side spray box 402 facing the perforated frame 403. The air jet slots are distributed at intervals along the length direction of the side spray box 402, and the opening direction of each air jet slot is pointing towards the center area of ​​the perforated frame 403. During the operation of the cooling device, a part of the airflow enters the interior of the side spray box 402 through the guide channel on the buffer partition 400. After being pressure-equalized by the side spray box 402, it is evenly sprayed out from each air jet slot, forming a transverse or oblique cooling airflow towards the side area of ​​the perforated frame 403. In this way, the airflow ejected from the side spray box 402 can directly blow onto the side and bottom areas of the parts installed on the hollow frame 403, forming a cross-complementary three-dimensional cooling air field with the airflow blown from the rotating fan ring 401. This generates effective cooling airflow coverage in multiple directions, such as the bottom, sides, and top of the parts, further reducing cooling dead zones and ensuring the uniformity of the temperature field inside the entire converter cabinet.

[0049] An air inlet pipe 501 is provided at the air inlet position on the back of the cooling housing 100. One end of the air inlet pipe 501 is connected to the air inlet on the back of the cooling housing 100, and the other end is connected to the air outlet of the dust collector 104. An air inlet pipe 105 is provided at the air inlet of the dust collector 104. The air inlet of the air inlet pipe 105 is connected to the external atmospheric environment to introduce outside cold air. A blower 106 is installed on the air inlet pipe 105. The blower 106 is preferably a centrifugal blower or an axial flow blower. It is used to generate negative pressure inside the air inlet pipe 105, forcibly drawing outside cold air into the dust collector 104 for filtration, and then sending it into the cooling housing 100 through the air inlet pipe 501 to achieve forced air cooling of the converter components.

[0050] The dust collector 104 is equipped with a filter assembly for purifying the incoming airflow. The filter assembly specifically includes a rotating shaft 303 rotatably mounted inside the dust collector 104 and a rotating disc seat 300 rotatably mounted on the rotating shaft 303. The rotating shaft 303 is vertically positioned within the inner cavity of the dust collector 104, with its two ends rotatably connected to the top and bottom walls of the dust collector 104 via bearings, respectively. The rotating disc seat 300 has a disc-shaped structure, with its center fitted onto the rotating shaft 303, and can slide axially relative to the rotating shaft 303 and rotate synchronously with it. A sealing ring is provided between the outer edge of the rotating disc seat 300 and the inner wall of the dust collector 104. This sealing ring is preferably made of wear-resistant rubber or polytetrafluoroethylene (PTFE) to prevent unfiltered airflow from leaking through the gap between the rotating disc seat 300 and the inner wall of the dust collector 104. The upper surface of the rotating disk 300 is provided with a filter screen 301 for filtering the airflow. The filter screen 301 is annular or circular and covers the entire upper surface area of ​​the rotating disk 300. Its material is preferably stainless steel woven mesh or synthetic fiber filter felt. The mesh size is reasonably selected according to the dust particle size distribution of the actual use environment, for example, a filter screen of 200 mesh to 400 mesh is selected.

[0051] The end of the inlet pipe 105 extends into the dust collector 104 and is equipped with an extension pipe 302. The outlet port of the extension pipe 302 is bent downwards, with its opening facing the center area or near the center of the upper surface of the filter screen 301. With this arrangement, the airflow introduced by the inlet pipe 105 is essentially blown directly and vertically onto the surface of the filter screen 301, allowing dust particles in the airflow to be effectively captured by the filter screen 301 under the combined effects of inertial impaction and interception, thereby improving filtration efficiency. The extension pipe 302 is coaxially arranged with the inlet pipe 501, and the diameter of the extension pipe 302 is smaller than the diameter of the inlet pipe 501. This means that when the high-speed airflow ejected through the extension pipe 302 enters the larger-diameter inlet pipe 501, the airflow velocity decreases and the pressure recovers, which is beneficial for uniform airflow distribution and stable flow.

[0052] Below the extension pipe 302, an upper partition 311 is arranged horizontally within the inner cavity of the dust collector 104. One end of the upper partition 311 is fixedly connected to the inner wall of the dust collector 104, and the other end extends to the vicinity of the air outlet of the extension pipe 302. The end of the upper partition 311 is approximately flush with the end of the extension pipe 302 in the vertical direction. The upper partition 311 divides the inner cavity of the dust collector 104 into an upper chamber and a lower chamber. The upper chamber is the dust-laden airflow area, and the lower chamber is the clean air collection area. This separation design effectively reduces the non-filtered leakage of the dust-laden airflow from the upper chamber to the lower chamber, ensuring that most of the airflow must be filtered by the filter screen 301 before entering the lower chamber and finally discharged from the inlet pipe 501.

[0053] The bottom of the dust collector 104 is equipped with a collection component for collecting dust and impurities removed from the filter screen 301 by the cleaning mechanism, facilitating subsequent unified processing. Below the upper partition 311, on the surface of the dust collector 104, i.e., the side wall of the lower chamber, is a cleaning mechanism for back-blowing and cleaning the filter screen 301. This cleaning mechanism periodically or as needed blows air backwards onto the lower surface of the filter screen 301, blowing away dust particles clogged in the mesh of the filter screen 301, thereby restoring the permeability of the filter screen 301 and ensuring the long-lasting filtration effect of the equipment.

[0054] The cleaning mechanism includes a cleaning notch located on the side of the dust collector 104. The notch is rectangular or circular, with an opening area smaller than the cross-sectional area of ​​the exhaust port of the dust collector 104. This ensures that most of the filtered clean airflow can still be normally discharged from the exhaust port and supplied to the cooling housing 100. A cleaning box 316 is located at the cleaning notch. The cleaning box 316 is a sealed box structure, forming a cleaning chamber inside. The cleaning chamber is connected to the lower chamber inside the dust collector 104 via the cleaning notch. The air inlet of the cleaning box 316 is connected to the end of a backflush guide pipe 109, which introduces a portion of the heat-exchanged airflow into the cleaning box 316 as a backflush air source.

[0055] A heat dissipation outer casing 103 is fitted around the outer side of the intake pipe 501. The heat dissipation outer casing 103 is cylindrical or box-shaped, with both ends sealed to the outer wall of the intake pipe 501, forming an annular airflow channel surrounding the intake pipe 501. Multiple heat exchange fins 502 are distributed on the outer wall of the intake pipe 501, spaced apart along the axial direction of the intake pipe 501 and extending radially outward, significantly increasing the heat exchange area between the intake pipe 501 and the airflow inside the heat dissipation outer casing 103. The heat exchange fins 502 are preferably made of aluminum alloy or copper alloy with good thermal conductivity, and their shape can be either annular or longitudinal fins to further improve heat exchange efficiency.

[0056] Multiple exhaust ports are distributed on the outer side of the cooling shell 100, each exhaust port being connected to the air inlet of the heat dissipation outer box 103 via a return pipe 102. The exhaust end of the heat dissipation outer box 103 is connected to the air inlet of the backflushing guide pipe 109 via a pipe. During actual operation of the cooling device, the hot airflow after heat exchange inside the cooling shell 100 is discharged from each exhaust port and enters the heat dissipation outer box 103 along the return pipe 102. When this hot airflow flows over the surface of the heat exchange fins 502 inside the heat dissipation outer box 103, it carries away the heat from the wall of the air inlet pipe 501, thereby pre-cooling the fresh cold air about to enter the cooling shell 100, further reducing the airflow temperature entering the cooling shell 100, and effectively improving the heat dissipation effect. At the same time, the connection section between the air inlet pipe 501 and the dust collector 104 is designed as a conical structure, that is, the flow cross-sectional area of ​​this connection section gradually decreases along the airflow direction. According to fluid mechanics principles, as airflow moves along a conical channel, the flow area gradually decreases, the airflow is compressed, its velocity increases, and its pressure rises. Simultaneously, the airflow temperature rises slightly due to the compression effect. However, when the airflow is injected into the intake pipe 501 from the smaller end of the conical channel and enters a larger space, the airflow expands, performs work, and its internal energy decreases, resulting in a significant drop in airflow temperature. This cooling mechanism, based on the Joule-Thomson effect, combined with the pre-cooling effect of the heat dissipation casing 103, further reduces the temperature of the airflow entering the cooling casing 100, significantly enhancing the cooling effect on the converter components.

[0057] After the airflow enters the cleaning box 316 along the backflush guide pipe 109, the airflow backflushes the filter screen 301 from below. Specifically, the backflush airflow passes through the mesh of the filter screen 301 from bottom to top, blowing away dust particles accumulated on the upper surface and inside the mesh of the filter screen 301. This cleans the filter screen 301 in the lower cleaning area, ensuring that the overall filtration effect of the equipment can be maintained at a high level for a long time.

[0058] A cleaning roller 305 is vertically installed in the cleaning box 316. The lower end of the cleaning roller 305 is rotatably connected to the bottom wall of the cleaning box 316 via a bearing, and the upper end is rotatably connected to the top wall of the cleaning box 316 via a bearing or a rotary seal. The cleaning roller 305 is a hollow tubular structure with an internal airflow channel. The air inlet at the bottom of the cleaning roller 305 is rotatably connected to the end of the backflushing guide pipe 109 via a rotary joint, ensuring that the backflushing guide pipe 109 can continuously supply air to the interior of the cleaning roller 305 during rotation. Multiple air jet holes 307 are provided on the outer wall of the cleaning roller 305, and the air jet holes 307 are arranged in an array along the axial and circumferential directions of the cleaning roller 305. The exhaust hole axis of the multiple air jet holes 307 is set at an acute angle with the tangent of the outer surface of the cleaning roller 305, preferably between 30° and 60°. When the high-pressure backflush airflow is ejected from the inside of the cleaning roller 305 through each jet hole 307, the airflow generates a reaction force on the cleaning roller 305 opposite to the jet direction. Since the axis of the jet hole 307 is at an acute angle to the tangential plane, the component of this reaction force in the tangential direction forms a rotational torque. Under the action of this rotational torque, the cleaning roller 305 will rotate rapidly around its own axis, achieving self-driven rotation without the need for an additional drive motor.

[0059] Multiple brushes 306 are distributed on the outer wall of the cleaning roller 305, with the bristles of the brushes 306 protruding a certain distance from the outer surface of the cleaning roller 305. During the rotation of the cleaning roller 305, the brushes 306 rotate synchronously with it, and the bristles move relative to the lower surface of the filter screen 301, thus mechanically brushing and cleaning the surface of the filter screen 301. The physical brushing action of the brushes 306, combined with the back-blowing airflow ejected from the air jet 307, works synergistically to more efficiently remove strongly adhered dust particles from the surface of the filter screen 301 and inside the mesh openings, thus better completing the cleaning process. A rotary transmission component is provided at the upper end of the cleaning roller 305 to drive the rotating shaft 303. This component transmits the rotational motion of the cleaning roller 305 to the rotating shaft 303, which in turn drives the rotating disk 300 to rotate slowly.

[0060] A sliding element is provided between the rotating shaft 303 and the rotating disk base 300. This sliding element ensures that the filter screen 301 maintains a certain gap with the brush 306 in its initial state, without contact. Only when the surface of the filter screen 301 is severely clogged will the brush 306 contact the surface of the filter screen 301 and perform a cleaning operation. This avoids the filter screen 301 being repeatedly and meaninglessly wiped by the brush 306 when it is in a well-permeable state and requires no cleaning, effectively extending the service life of the filter screen 301.

[0061] The sliding component includes an auxiliary sliding sleeve 314 positioned at the center of the rotating disk base 300. The auxiliary sliding sleeve 314 is fixedly connected to or integrally formed with the rotating disk base 300. A guide protrusion 312 extends axially along the rotating shaft 303, and its cross-sectional shape is preferably rectangular or trapezoidal. A sliding groove matching the guide protrusion 312 is formed on the inner wall of the auxiliary sliding sleeve 314. The sliding groove extends axially along the auxiliary sliding sleeve 314, and the guide protrusion 312 is embedded in the sliding groove and can slide freely within it. Through the cooperation of the guide protrusion 312 and the sliding groove, the rotating disk base 300 can slide axially relative to the rotating shaft 303 and rotate synchronously with the rotating shaft 303. A rotating ring 313 is fixedly sleeved at the lower end of the rotating shaft 303, and the rotating ring 313 is elastically connected to the bottom surface of the auxiliary sliding sleeve 314 by one or more trigger springs 315. The trigger spring 315 is in a compressed or free state in the initial state, applying an upward elastic thrust to the auxiliary sliding sleeve 314, so that the rotating disk seat 300 is kept at the upper limit position away from the cleaning roller 305.

[0062] Initially, the filter screen 301 is open, with minimal filtration resistance. The downward thrust of the airflow onto the rotating disk 300 is less than the upward force of the trigger spring 315. Therefore, under the pressure of the rotating ring 313, the filter screen 301 remains at its upper limit position, not in contact with the brush 306. As filtration time increases, the dust trapped on the filter screen 301 gradually increases, the mesh becomes clogged, and the filtration resistance gradually increases. Consequently, the downward thrust of the airflow onto the rotating disk 300 also increases. When the air resistance increases to a certain level, and the downward thrust exceeds the force of the trigger spring 315, the rotating disk 300 overcomes the force of the trigger spring 315 and slides downward along the rotating shaft 303, causing the filter screen 301 to come into contact with the surface of the brush 306. At this point, the brush 306 begins to clean the filter screen 301. After cleaning, the filtration resistance decreases, the air thrust decreases, and the trigger spring 315 pushes the rotating disk 300 back to its initial position.

[0063] To further improve heat dissipation, the cooling housing 100 is also equipped with an atomizing element for spraying water mist into the return pipe 102. This atomizing element adds fine water mist particles to the surface of the heat exchange fins 502. When the water mist evaporates on the surface of the heat exchange fins 502, it absorbs a large amount of latent heat of vaporization, thereby carrying away heat from the surface of the heat exchange fins 502 and further reducing the temperature of the air flowing through the intake pipe 501, which helps improve the cooling effect of the equipment in high-temperature environments.

[0064] The atomizing component includes a first guide sleeve 201 disposed on the surface of the cooling housing 100. The first guide sleeve 201 is a vertically arranged cylindrical structure, which is fixedly installed on the top wall or side wall of the cooling housing 100. A trigger rod 208 is slidably inserted through the first guide sleeve 201. The trigger rod 208 is a slender rod-shaped structure, with its lower end extending into the interior of the cooling housing 100 and its upper end extending into the exterior of the cooling housing 100. Guide units are symmetrically arranged on both sides of the trigger rod 208. The guide units are used to guide and limit the up-and-down sliding of the trigger rod 208, ensuring that the trigger rod 208 moves smoothly in the vertical direction without deflection. The upper end of the trigger rod 208 passes upward through a second guide sleeve 209 fixedly disposed on the outer wall of the return pipe 102. The inner hole of the second guide sleeve 209 slides in conjunction with the outer wall of the trigger rod 208, ensuring that the trigger rod 208 can smoothly penetrate into the interior of the return pipe 102.

[0065] An atomizing water tank 200 is fixedly mounted on the cooling housing 100, and the atomizing water tank 200 stores clean water or coolant. A fixed water guide pipe 213 is connected to the water outlet of the atomizing water tank 200, and the other end of the fixed water guide pipe 213 passes through the wall of the return pipe 102 and extends into the internal cavity of the return pipe 102. A nozzle assembly 207 is provided at the end of the fixed water guide pipe 213 located inside the return pipe 102. The nozzle assembly 207 is used to convert the water into a fine water mist and spray it into the return pipe 102.

[0066] The lower end of the trigger rod 208 extends into the cooling housing 100, and a thermal expansion block 212 is fixedly provided at the bottom of the trigger rod 208. The thermal expansion block 212 is made of a material with a high coefficient of thermal expansion, such as paraffin-based thermal expansion material, bimetallic sheet laminate structure, or aluminum alloy with a high coefficient of linear expansion. A pressure roller 211 is rotatably mounted on the extended end of the thermal expansion block 212 (i.e., the end away from the trigger rod 208). The pressure roller 211 is rotatably connected to the end of the thermal expansion block 212 by a pin. The outer circumferential surface of the pressure roller 211 is smooth and is used for rolling contact with multiple protrusions 210 distributed in an array on the outer side of the rotating fan ring 401.

[0067] The expansion principle of the thermal expansion block 212 is as follows: The thermal expansion block 212 is made of a thermally sensitive material. When heated, the lattice vibration inside the material intensifies or the phase transition volume changes, causing the material to expand macroscopically in all directions. When the temperature exceeds a set threshold, the elongation of the thermal expansion block 212 is sufficient to push the pressure roller 211 toward the rotating fan ring 401 and into the rotation trajectory range of the protrusion 210. When the internal temperature of the cooling shell 100 further increases, the elongation of the thermal expansion block 212 increases accordingly, and the pressure roller 211 enters the rotation trajectory of the protrusion 210 more deeply. This causes the triggering frequency and triggering amplitude of the trigger rod 208 to increase accordingly, realizing the adaptive adjustment function of automatically increasing the spray volume as the temperature rises.

[0068] Specifically, when the internal temperature of the cooling housing 100 is within a reasonable range (i.e., below a set threshold), the thermal expansion block 212 is in a state of no expansion or slight expansion, and a certain gap is maintained between the pressure roller 211 and the protrusion 210 on the outer side of the rotating fan ring 401, so the pressure roller 211 is not impacted by the protrusion 210. When the internal temperature of the cooling housing 100 is higher than the set value, the thermal expansion block 212 expands significantly, its length increases, and it pushes the pressure roller 211 downward toward the rotating fan ring 401, causing the pressure roller 211 to enter the rotation trajectory range of the protrusion 210. At this time, the rotating fan ring 401 continues to rotate under the drive of airflow, and the protrusion 210 on its outer side rotates synchronously with the rotating fan ring 401. The protruding part of the protrusion 210 will intermittently impact the pressure roller 211, generating a periodic upward thrust on the pressure roller 211. Under the action of this thrust, the trigger rod 208 slides upward along the first guide sleeve 201 and the second guide sleeve 209, and its upper end intermittently presses against the triggering component of the nozzle assembly 207, thereby triggering the water spraying action. Furthermore, as mentioned earlier, as the internal temperature of the cooling housing 100 continues to rise, the expansion amplitude of the thermal expansion block 212 further increases, and the squeezing amplitude of the trigger rod 208 against the nozzle assembly 207 also increases accordingly, thereby increasing the spray volume and achieving an intelligent temperature control effect that automatically adjusts the cooling intensity according to temperature changes.

[0069] The nozzle assembly 207 includes a piston cylinder 205 connected to a fixed water guide pipe 213. The piston cylinder 205 is cylindrical, and its inner cavity is connected to the internal channel of the fixed water guide pipe 213. A one-way drain valve is provided between the piston cylinder 205 and the fixed water guide pipe 213. This one-way drain valve only allows water to flow from the fixed water guide pipe 213 into the piston cylinder 205, preventing water from flowing back from the piston cylinder 205 into the fixed water guide pipe 213. A piston block 216 is slidably mounted inside the piston cylinder 205. The outer wall of the piston block 216 slides and seals against the inner wall of the piston cylinder 205, dividing the inner cavity of the piston cylinder 205 into a water cavity and a spring cavity. The lower end face of the piston block 216 is elastically connected to the inner bottom of the piston cylinder 205 via a return spring 215. The return spring 215 is initially in a free state or slightly compressed state, applying an upward elastic force to the piston block 216. A trigger block 217, corresponding to the upper end of the trigger rod 208, is fixedly provided at the lower center of the piston block 216. The trigger block 217 extends from the bottom of the piston cylinder 205 and is used to receive the upward pushing force of the trigger rod 208. Multiple circumferential nozzles 214 are arranged in a circumferential array on the outer side wall of the piston cylinder 205. The nozzles 214 have extremely fine orifices, preferably with a diameter of 0.1 mm to 0.5 mm, for atomizing water into tiny droplets.

[0070] When the top of the trigger rod 208 exerts an upward pushing force on the trigger block 217, the piston block 216 overcomes the elastic force of the return spring 215 and slides upward along the inner wall of the piston cylinder 205, compressing the effective volume of the water chamber and causing the pressure inside the water chamber to rise sharply. Under high pressure, the water in the water chamber is sprayed out at high speed through the circumferential nozzles 214, forming a fine water mist, which is sprayed onto the surface of the heat exchange fins 502 inside the return pipe 102, thus completing the spraying operation. When the pushing force of the trigger rod 208 on the trigger block 217 disappears, under the elastic restoring force of the return spring 215, the piston block 216 slides downward to reset, and at the same time, the one-way drain valve opens, and water is replenished into the water chamber of the piston cylinder 205 from the fixed water guide pipe 213, preparing for the next spraying.

[0071] The guiding unit includes two horizontal bars 206 symmetrically arranged on both sides of the trigger rod 208. The inner end of each horizontal bar 206 is fixedly connected to the side wall of the trigger rod 208, and a reset sleeve 203 is fixedly installed on its outer end. A vertically arranged reset guide rod 204 slides through each reset sleeve 203, and the bottom of the reset guide rod 204 is fixedly connected to the top wall of the cooling housing 100. A reset spring 202 is provided between the reset sleeve 203 and the top wall of the cooling housing 100. The reset spring 202 is sleeved on the outside of the reset guide rod 204, with its upper end abutting against the bottom surface of the reset sleeve 203 and its lower end abutting against the top wall of the cooling housing 100. During the up-and-down movement of the trigger rod 208, the reset sleeve 203 slides up and down synchronously along the reset guide rod 204. Due to the guiding and constraining effect of the reset guide rods 204 on both sides, the sliding of the trigger rod 208 is more stable, preventing the trigger rod 208 from deflecting or getting stuck during the sliding process. The return spring 202 is compressed when the trigger rod 208 moves upward, storing elastic potential energy. When the external thrust disappears, the return spring 202 releases the elastic potential energy, pushing the return sleeve 203 and the trigger rod 208 downward to reset, ensuring that the trigger rod 208 can return to the initial position in time.

[0072] The rotary transmission component includes a second gear 310 fixedly mounted on the upper end of the rotating shaft 303. The second gear 310 is coaxially and fixedly connected to the rotating shaft 303, and can drive the rotating shaft 303 to rotate synchronously. A transmission shaft 308 is coaxially and fixedly connected to the upper end of the cleaning roller 305. The transmission shaft 308 extends upward and passes through the top wall of the cleaning box 316. A first gear 309 is fixedly mounted on the upper end of the transmission shaft 308. The first gear 309 and the second gear 310 are spatially meshed. When the cleaning roller 305 rotates rapidly under the drive of the backflushing airflow, the transmission shaft 308 rotates synchronously. The first gear 309 at the upper end of the transmission shaft 308 drives the meshing second gear 310 to rotate. The second gear 310 then drives the rotating shaft 303 and the rotating disk seat 300 fixed on the rotating shaft 303 to rotate synchronously. Through the aforementioned gear transmission, the cleaning roller 305 and the rotating disk seat 300 are linked to rotate, thereby enabling each filter area on the filter screen 301 to rotate sequentially to the cleaning notch position for cleaning. This achieves full-area cyclic cleaning of the filter screen 301, ensuring that all parts of the entire filter screen 301 can be cleaned and maintained in a timely and effective manner.

[0073] The collecting component includes a slag discharge pipe 107 located at the bottom of the dust collector 104. The upper end of the slag discharge pipe 107 is connected to the lower internal chamber of the dust collector 104, and the lower end extends downward. A collecting cylinder 108 is detachably installed at the lower end of the slag discharge pipe 107 via a threaded connection or a snap-fit ​​connection. Multiple vent holes are evenly distributed on the side wall and / or bottom wall of the collecting cylinder 108. The vent hole diameter is smaller than the particle size of the dust particles, allowing airflow to pass through while preventing dust particles from overflowing. During operation, the backflushing airflow blows the cleaned dust and impurities away from the surface of the filter screen 301. The airflow carrying the dust flows downward through the slag discharge pipe 107 under the guidance of the guide arc plate 304. The dust particles in the airflow are intercepted and stored inside the collecting cylinder 108 by gravity settling and filtration interception, while the airflow is discharged from the vent holes of the collecting cylinder 108, achieving gas-solid separation. When the dust in the collection cylinder 108 accumulates to a certain level, the operator can remove the collection cylinder 108 from the slag discharge pipe 107, empty and clean it, and then reinstall it for use.

[0074] A guide arc plate 304 is installed in the dust collection box 104 above the slag discharge pipe 107. The guide arc plate 304 has an arc-shaped curved structure, with its concave surface facing the inlet direction of the slag discharge pipe 107. The guide arc plate 304 is used to guide the back-blowing airflow in the lower chamber, so that the airflow carrying dust can flow more smoothly and orderly towards the slag discharge pipe 107, avoiding the formation of eddies or turbulent flow in the airflow inside the dust collection box 104, thereby improving the dust collection efficiency and preventing secondary dust re-entrainment inside the dust collection box 104.

[0075] The working process and temperature control principle of the atomizing element in a high-temperature environment are explained in detail:

[0076] like Figures 8 to 9 As shown, the atomizing water tank 200 is fixedly installed on the top or side wall of the cooling housing 100, and the water level inside is maintained at a certain height. Water is continuously supplied to the fixed water guide pipe 213 by gravity or a micro water pump. The water inlet end of the fixed water guide pipe 213 extends into the atomizing water tank 200 and extends below the water surface, ensuring that water can be replenished into the piston cylinder 205 in a timely manner after each spray action of the nozzle assembly 207.

[0077] The thermal expansion block 212 is made of paraffin-metal composite thermal expansion material or high-expansion alloy material. Taking paraffin-based thermal expansion material as an example, its working principle is as follows: Paraffin is solid at room temperature. When the temperature rises to its phase transition temperature, paraffin undergoes a solid-liquid phase transition, and its volume expansion rate can reach 10% to 20%, which is much higher than the thermal expansion rate of ordinary metal materials. Utilizing this property, the paraffin is sealed in a rigid shell with a guide piston. When the paraffin expands due to heat, it pushes the piston outward, thereby converting the thermal expansion into mechanical displacement. When the internal temperature of the cooling shell 100 is within the normal range, the paraffin remains solid, the extended end of the thermal expansion block 212 is in the contracted position, and a safe gap of about 2mm to 5mm is maintained between the pressure roller 211 and the protrusion 210 on the outer side of the rotating fan ring 401, so they do not contact each other. At this time, although the rotating fan ring 401 continues to rotate, the protrusion 210 on it will not hit the pressure wheel 211 during the rotation. Therefore, the trigger rod 208 remains stationary, the nozzle assembly 207 does not move, and the atomizing component is in standby mode.

[0078] When the internal temperature of the cooling housing 100 gradually increases and exceeds a set threshold due to factors such as increased inverter load or rising ambient temperature, heat is transferred to the thermal expansion block 212 through air convection and heat conduction within the cooling housing 100. The paraffin wax in the thermal expansion block 212 absorbs heat and begins to melt, causing significant volume expansion and pushing the piston rod of the thermal expansion block 212 outwards. As the piston rod extends, the pressure roller 211 moves along with the piston rod towards the rotating fan ring 401. When the temperature reaches the set trigger value, the outer circumferential surface of the pressure roller 211 comes into contact with the outer edge of the rotation trajectory of the protrusion 210. Subsequently, as the rotating fan ring 401 rotates, the protruding portion of the protrusion 210 periodically contacts and presses against the pressure roller 211, converting the rotational motion into an intermittent pushing action on the pressure roller 211. Whenever the protruding part of the protrusion 210 passes the pressure roller 211, the pressure roller 211 is pushed upward and the trigger rod 208 is pushed upward by the thermal expansion block 212.

[0079] After the trigger rod 208 slides upward, its upper end passes through the second guide sleeve 209 and enters the return pipe 102, directly pressing against the trigger block 217 of the nozzle assembly 207. Under the upward thrust, the trigger block 217 pushes the piston block 216 upward along the inner wall of the piston cylinder 205, compressing the water chamber. The pressure inside the water chamber rapidly increases to the spray pressure, forcing the water to be ejected at high speed from each circumferential nozzle 214, forming a fine water mist with an atomization cone angle of 60° to 120°. The water mist permeates the inside of the return pipe 102, uniformly adhering to the surface of the heat exchange fins 502. Since the return pipe 102 contains hot airflow discharged from the cooling shell 100, the temperature of this hot airflow is usually higher than the ambient temperature. After absorbing the sensible heat of the hot airflow on the surface of the heat exchange fins 502, the water mist rapidly evaporates and vaporizes. The vaporization process absorbs a large amount of latent heat of vaporization, thus significantly reducing the temperature of the heat exchange fins 502. The decrease in temperature of heat exchange fin 502 further increases the temperature difference between it and the wall of inlet pipe 501, strengthens the heat transfer driving force from the wall of inlet pipe 501 to heat exchange fin 502, thereby further reducing the temperature of the airflow inside inlet pipe 501 and achieving a deep cooling effect.

[0080] As the internal temperature of the cooling housing 100 continues to rise, for example from 65°C to 75°C, the expansion amplitude of the thermal expansion block 212 increases further, and the piston rod extends further, causing the pressure roller 211 to enter the rotation trajectory range of the protrusion 210 more deeply. At this time, the squeezing stroke of the protrusion 210 against the pressure roller 211 increases, and the upward movement of the trigger rod 208 increases accordingly. Correspondingly, the pushing stroke of the trigger rod 208 against the trigger block 217 also increases, the compression stroke of the piston block 216 in the water chamber increases, the compression ratio of the water chamber increases, the spray pressure generated inside the water chamber is higher, and the spray volume of the circumferential nozzle 214 per unit time increases accordingly. At the same time, because the pressure roller 211 enters the rotation trajectory of the protrusion 210 more deeply, the contact time between the protrusion 210 and the pressure roller 211 is prolonged, and the duration of each spray also increases. Combining the above dual effects, the spray volume automatically increases with the increase of temperature, realizing an intelligent temperature control function that adaptively adjusts the spray intensity according to temperature changes. When the internal temperature of the cooling shell 100 drops below the set threshold, the paraffin in the thermal expansion block 212 re-solidifies and contracts, the piston rod retracts, the pressure roller 211 exits the rotation trajectory range of the protrusion 210, and the trigger rod 208 is reset to the initial position under the synergistic action of the reset spring 202 and the return spring 215, the spraying action stops, and the atomizing component returns to standby state.

[0081] This embodiment provides a detailed description of the filtering components and cleaning mechanism described in the above embodiments:

[0082] like Figures 3 to 7As shown, external cold air, under the suction of the blower 106, enters the dust collection box 104 through the air inlet pipe 105. The dust-laden airflow, guided and accelerated by the extension pipe 302, is blown vertically downwards at a high speed onto the upper surface of the filter screen 301. Dust particles in the airflow are captured and retained on the upper surface of the filter screen 301 by the fibers or mesh of the filter screen 301 under the combined effects of inertial impaction, interception, and diffusion, forming a dust layer. The clean airflow, purified by the filter screen 301, passes through the filter screen 301 into the lower chamber below the rotating disk seat 300, and then enters the interior of the cooling housing 100 through the air inlet pipe 501.

[0083] After the clean airflow enters the cooling housing 100, it first flows through the buffer area below the buffer partition 400, where pressure equalization and flow rate adjustment occur. Then, part of the airflow rises through the rotating fan ring 401 on the buffer partition 400, while the other part enters the side spray box 402. The airflow passing through the rotating fan ring 401 drives the rotating fan ring 401 to rotate and provides frontal cooling to the parts; the airflow entering the side spray box 402 is ejected through the jet channels to provide auxiliary cooling to the sides and bottom of the parts. After heat exchange, the hot airflow temperature rises and is discharged from the various exhaust ports of the cooling housing 100, entering the heat dissipation outer casing 103 through the return pipe 102.

[0084] As the hot airflow entering the heat dissipation casing 103 flows over the surface of the heat exchange fins 502, it exchanges heat with the wall of the intake pipe 501, carrying away the heat of the fresh, cold air about to enter the cooling shell 100, thus achieving pre-cooling. The pre-cooled hot airflow is then discharged from the exhaust end of the heat dissipation casing 103 and splits into two paths: one path is directly discharged into the outside atmosphere, and the other path enters the cleaning box 316 via the backflush guide pipe 109 as a backflush air source.

[0085] The backflush airflow entering the cleaning chamber 316 enters the internal cavity of the cleaning roller 305 from the air inlet at the bottom of the cleaning roller 305, and then is ejected at high speed through the air jet holes 307 on the side wall of the cleaning roller 305. Since the axis of the air jet hole 307 forms an acute angle with the tangential surface of the cleaning roller 305, the ejected airflow generates a tangential reaction force on the cleaning roller 305, driving the cleaning roller 305 to rotate at high speed around its axis. As the cleaning roller 305 rotates, the brushes 306 on its outer side physically brush the lower surface of the filter screen 301, while the high-speed airflow from the air jet holes 307 passes through the mesh of the filter screen 301 from bottom to top, blowing out the dust particles clogged in the mesh. The brushing action of the brushes 306 and the pneumatic scouring action of the backflush airflow work together to complete the cleaning process of the filter screen 301.

[0086] While the cleaning roller 305 rotates, the meshing transmission of the first gear 309 and the second gear 310 drives the rotating shaft 303 and the rotating disk 300 to rotate slowly. The rotation of the rotating disk 300 causes each radial area on the filter screen 301 to pass through the cleaning position above the cleaning notch in sequence, realizing the cyclic cleaning of the entire filter screen 301. The dust that is cleaned off is carried by the back-blowing airflow and guided by the guide arc plate 304, smoothly enters the collection cylinder 108 through the slag discharge pipe 107. The dust is intercepted by the collection cylinder 108, and the airflow is discharged from the vent of the collection cylinder 108.

[0087] Explanation of the automatic contact control principle between filter screen 301 and brush 306:

[0088] like Figure 6 As shown, in the initial state, the filter screen 301 is either brand new or already cleaned, with good mesh permeability and very low filtration resistance. At this time, the pressure loss of the airflow passing through the filter screen 301 is low, and the downward thrust acting on the rotating disk 300 is small, insufficient to overcome the upward force of the trigger spring 315. Under the action of the trigger spring 315, the auxiliary sliding sleeve 314 is pushed to the upper limit position of the rotating shaft 303, maintaining a gap between the filter screen 301 and the brush 306 on the cleaning roller 305, preventing them from contacting each other.

[0089] As filtration continues, the dust layer on the upper surface of the filter screen 301 gradually thickens, and some dust particles become embedded inside the mesh, causing the filtration resistance to gradually increase. The pressure loss of the airflow passing through the filter screen 301 increases accordingly, and the downward thrust acting on the rotating disk 300 also increases. When the clogging of the filter screen 301 reaches a set level (e.g., the pressure loss increases to 2 to 3 times the initial value), the downward thrust exceeds the upward force of the trigger spring 315. The auxiliary sleeve 314 overcomes the force of the trigger spring 315 and slides downward along the guide protrusion 312, causing the rotating disk 300 and the filter screen 301 to move downward together until the lower surface of the filter screen 301 contacts the tip of the bristles of the brush 306.

[0090] When the filter screen 301 comes into contact with the brush 306, the brush 306 effectively cleans the filter screen 301 as the cleaning roller 305 rotates. As cleaning progresses, the dust on the filter screen 301 is gradually removed, the filtration resistance gradually decreases, and the downwind thrust decreases accordingly. When the filtration resistance drops below a set level, the downwind thrust is less than the spring force of the trigger spring 315. The trigger spring 315 pushes the auxiliary sliding sleeve 314 upward to reset, and the filter screen 301 disengages from the brush 306 again, stopping the cleaning process.

[0091] Through the above-mentioned automatic control mechanism, the filter screen 301 only comes into contact with the brush 306 when cleaning is required, avoiding meaningless repeated wiping when the filter screen is in a good permeability state. This effectively reduces the mechanical wear of the filter screen 301 by the brush 306, significantly extends the service life of the filter screen 301, and reduces the frequency of replacement and maintenance costs of the filter screen 301.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 cooling device for a wind power converter, characterized in that, Includes a cooling housing (100), a buffer partition (400) disposed inside the cooling housing (100), a perforated frame (403) disposed between the buffer partition (400) and the movable door (101) of the cooling housing (100), multiple rotating fan rings (401) rotatably disposed on the buffer partition (400), a side spray box (402) connected to the surface of the buffer partition (400), and an air inlet pipe (501) connected to the cooling housing (100). The system includes a dust collection box (104) connected to the air intake pipe (501), a filter assembly disposed in the dust collection box (104), a cleaning mechanism disposed on the side of the dust collection box (104), a heat dissipation outer box (103) sleeved on the outside of the air intake pipe (501), a return pipe (102) connecting the exhaust port of the cooling shell (100) and the air intake end of the heat dissipation outer box (103), and an atomizing element disposed on the cooling shell (100) for spraying water mist into the return pipe (102); The dust collector (104) has an air inlet pipe (105) at its air inlet end, and a blower (106) is provided on the air inlet pipe (105). The connection section between the air inlet pipe (501) and the dust collector (104) is a conical structure, and heat exchange fins (502) are distributed on the outside of the air inlet pipe (501).

2. The wind power converter cooling device according to claim 1, characterized in that, The hollow frame (403) has multiple connection holes (404) for assisting in the installation of inverter parts.

3. The wind power converter cooling device according to claim 1, characterized in that, The rotating fan ring (401) is provided with blades, and the rotating fan ring (401) is used to guide the airflow in all directions when the airflow passes through it.

4. The wind power converter cooling device according to claim 1, characterized in that, The filter assembly includes a rotating shaft (303) rotatably disposed inside the dust collection box (104), a rotating disk seat (300) rotatably disposed on the rotating shaft (303), a filter screen (301) disposed on the rotating disk seat (300), and an extension pipe (302) disposed at the end of the air inlet pipe (105) and extending to the vicinity of the filter screen (301). The extension pipe (302) is coaxially disposed with the air inlet pipe (501) and the diameter of the extension pipe (302) is smaller than the diameter of the air inlet pipe (501). An upper partition (311) is provided below the extension pipe (302), and the end of the upper partition (311) is flush with the end of the extension pipe (302).

5. The wind power converter cooling device according to claim 4, characterized in that, The cleaning mechanism includes a cleaning notch on the side of the dust collector (104), a cleaning box (316) covering the cleaning notch, a back-blowing guide pipe (109) connected to the air inlet of the cleaning box (316), and a cleaning roller (305) vertically arranged in the cleaning box (316). The exhaust end of the heat dissipation outer box (103) is connected to the air inlet of the back-blowing guide pipe (109). The cleaning roller (305) is hollow and its lower end is rotatably connected to the cleaning box (316). The air inlet at the bottom of the cleaning roller (305) is rotatably connected to the end of the back-blowing guide pipe (109). Multiple air jet holes (307) are opened on the outside of the cleaning roller (305). Multiple brushes (306) are distributed on the outside of the cleaning roller (305). A rotary transmission component that drives the rotating shaft (303) to rotate is provided at the upper end of the cleaning roller (305).

6. The wind power converter cooling device according to claim 5, characterized in that, A sliding member is provided between the rotating shaft (303) and the rotating disk seat (300). The sliding member includes an auxiliary sliding sleeve (314) located at the center of the rotating disk seat (300), a guide protrusion (312) located on the surface of the rotating shaft (303), a rotating ring (313) located at the end of the rotating shaft (303), and a trigger spring (315) connected between the rotating ring (313) and the auxiliary sliding sleeve (314). The inner wall of the auxiliary sliding sleeve (314) is provided with a sliding groove that matches the guide protrusion (312).

7. The wind power converter cooling device according to claim 1, characterized in that, The dust collector (104) is provided with a collection component at the bottom. The collection component includes a slag discharge pipe (107) located at the bottom of the dust collector (104) and a collection cylinder (108) detachably located at the lower end of the slag discharge pipe (107). The surface of the collection cylinder (108) is provided with multiple ventilation holes. A guide arc plate (304) is provided in the dust collector (104) above the slag discharge pipe (107).

8. The wind power converter cooling device according to claim 5, characterized in that, The rotary transmission component includes a second gear (310) disposed at the end of the rotating shaft (303), a transmission shaft (308) coaxially disposed at the upper end of the cleaning roller (305), and a first gear (309) fixedly disposed at the upper end of the transmission shaft (308), wherein the first gear (309) meshes with the second gear (310).

9. The wind power converter cooling device according to claim 1, characterized in that, The atomizing component includes a first guide sleeve (201) disposed on the surface of the cooling housing (100), a trigger rod (208) slidably disposed in the first guide sleeve (201), an atomizing water tank (200) disposed on the cooling housing (100), a fixed water guide pipe (213) communicating with the water outlet end of the atomizing water tank (200), a nozzle assembly (207) disposed at the end of the fixed water guide pipe (213), and a thermal expansion block (212) disposed at the bottom of the trigger rod (208). The other end of the fixed water guide pipe (213) passes through the return pipe (102), and the upper end of the trigger rod (208) passes through the return pipe (102). The second guide sleeve (209) is located outside the tube (102). The extension end of the thermal expansion block (212) is rotatably provided with a pressure wheel (211). Multiple protrusions (210) are arrayed on the outside of the rotating fan ring (401). Guide units are provided on both sides of the trigger rod (208). The guide unit includes a crossbar (206) symmetrically arranged on both sides of the trigger rod (208), a reset sleeve (203) arranged at the end of the crossbar (206), a reset guide rod (204) slidably arranged on the reset sleeve (203), and a reset spring (202) connected between the reset sleeve (203) and the cooling shell (100).

10. The wind power converter cooling device according to claim 1, characterized in that, The nozzle assembly (207) includes a piston cylinder (205) communicating with the fixed water guide pipe (213), a piston block (216) slidably disposed inside the piston cylinder (205), a return spring (215) connecting the piston block (216) and the bottom of the piston cylinder (205), and a plurality of circumferential nozzles (214) arrayed on the outside of the piston cylinder (205). The lower end of the piston block (216) is provided with a trigger block (217) corresponding to the trigger rod (208), and a one-way drain valve is provided between the piston cylinder (205) and the fixed water guide pipe (213).

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