A large capacity air-cooled cabinet ice melting device

Abstract

The application relates to a large-capacity air-cooled cabinet ice melting device, which is characterized in that the device comprises a cabinet body, a valve group, a fan assembly, a sleeve and an air duct, the valve group and the air duct are arranged in the interior of the cabinet body, the fan assembly is arranged on the front and back sides of the cabinet body and is used for providing forced convection power required for ice melting, the sleeve is arranged on the side of the cabinet body and is in sealed connection with the cabinet body, high-voltage direct-current outgoing lines are formed, meanwhile, the air duct is connected between the fan assembly and the valve group and is used for guiding airflow to flow through the valve group in a directional manner so as to strengthen heat exchange efficiency, hot air in the interior of the cabinet body is forcedly extracted through the fan assembly, negative pressure is formed in the interior of the cabinet body, external cold air is driven to enter the air inlet of the cabinet body and to flow through the valve group through the air duct, the cold air is discharged from the fan assembly after heat is taken away, and a stable forced convection cooling air path is formed. The application can meet the air-cooled use requirement of the large-capacity ice melting device and has the advantages of low cost and small occupation.

Description

Technical Field

[0001] This invention relates to an ice-melting device, specifically a large-capacity air-cooled cabinet-type ice-melting device, belonging to the field of power equipment technology. Background Technology

[0002] Low temperatures and snow can cause icing on power grid transmission lines, potentially leading to localized grid outages. DC de-icing devices, as an effective means of de-icing, have emerged and become widely used after ice storms. Currently, DC de-icing devices can be categorized into air-cooled and water-cooled methods. Water cooling, due to its higher heat dissipation efficiency, is often used in large-capacity de-icing devices. However, some substations lack the space to install dedicated water-cooling chambers, limiting the application of de-icing devices. Furthermore, configuring a water-cooling system requires regular inspection and maintenance, reducing the overall reliability of the de-icing device. Summary of the Invention

[0003] The purpose of this invention is to provide a large-capacity air-cooled cabinet-type ice-melting device that can meet the air-cooling requirements of large-capacity ice-melting devices, while also having the advantages of low cost and small footprint.

[0004] To achieve the above objectives, the technical solution of this invention is: a large-capacity air-cooled cabinet-type ice-melting device, the innovation of which lies in: including a cabinet, valve assembly, fan assembly, sleeve, and air duct. The valve assembly and air duct are both located inside the cabinet. Two sets of fan assemblies are respectively located on the front and rear sides of the cabinet to provide the forced convection power required for ice melting. The sleeve passes through the side of the cabinet and forms a sealed connection with the cabinet to realize high-voltage DC output. At the same time, the air duct connects the fan assembly and the valve assembly to guide the airflow in a directional manner and ensure that it all flows through the valve assembly to enhance heat exchange efficiency. The fan assembly forces hot air out of the cabinet and creates negative pressure inside the cabinet, driving external cold air to enter from the air inlet of the cabinet and flow through the air duct and valve group, carrying away heat and then being discharged from the fan assembly, forming a stable forced convection cooling air path.

[0005] In the above technical solution, the cabinet is equipped with two sets of valve groups, and the two sets of valve groups share the air inlet of the cabinet by being arranged back to back, so as to meet the heat dissipation of the two sets of valve groups at the same time.

[0006] In the above technical solution, the bottom of the cabinet is provided with a valve group support frame for easy assembly and disassembly of the valve group, and the valve groups are all fixed on the valve group support frame.

[0007] In the above technical solution, the cabinet is a frame structure that also provides protection and heat dissipation. The cabinet includes a cabinet frame, a sealing plate, louvers, a cabinet door, a cable inlet, and a cable bracket. The cabinet frame provides structural support and installation reference, and also serves as the skeleton of the air duct, ensuring overall structural strength and sealing performance. The sealing plate is fixed to the outside of the cabinet frame to achieve protective sealing of the cabinet, preventing dust and foreign objects from entering. At the same time, it serves as a sidewall for the air duct, guiding the orderly flow of air. The cabinet door is located on the front of the cabinet and is hinged to the front panel of the cabinet frame. The valve assembly is installed and maintained through the inspection window of the cabinet door. The cabinet door is equipped with louvers, which serve as air inlets for the cabinet. External cooling air enters the cabinet through the louvers to dissipate heat from the valve assembly. The cable inlet is located at the top or bottom of the cabinet and is used for the AC cable inlet. The cable bracket is fixed to the cabinet and close to the cable inlet to support and fix the AC cable inlet.

[0008] In the above technical solution, the side of the cabinet is reserved with mounting holes for installing sleeves, and the sleeves are sealed with rubber sealing rings to prevent air leakage or foreign objects from entering.

[0009] In the above technical solution, the valve assembly includes a press-fitting mechanism and multiple power units press-fitted together by the press-fitting mechanism. Each power unit includes a power device, a heat sink, a capacitor, and a resistor. The power device dissipates heat through a heat sink. The capacitor and resistor are respectively located on both sides of the power device and are electrically connected to the corresponding connection terminals of the power device.

[0010] In the above technical solution, the fan assembly includes a fan, a volute, and a guide shroud. The fan is fixed to the cabinet through the volute, and the volute and the cabinet are sealed together by a sealing gasket, so that the volute and the cabinet form a complete sealed air cavity to prevent airflow leakage. The guide shroud is fixed to the inside of the air inlet of the volute.

[0011] In the above technical solution, the air guide is composed of an inner ring and a radial grid. The radial grid is obliquely arranged inside the air inlet of the volute through the inner ring, and the radial grid is used to reduce airflow deviation and wind noise, and reduce the air intake resistance of the fan.

[0012] In the above technical solution, the air duct is composed of a valve group interface air duct, a side air duct plate, and foam. The valve group interface air duct, the side air duct plate, and the cabinet together form a complete sealed air duct for directional airflow. The valve group interface air duct is fixed to the radiator of the valve group and aligned with the air outlet of the radiator. The side air duct plate is fixed to the inner wall of the cabinet to form the side wall of the air duct. The valve group interface air duct and the side air duct plate are sealed by foam compression to eliminate air duct gaps, prevent airflow short circuits, and buffer installation stress to avoid deformation and damage to the air duct components.

[0013] In the above technical solution, multiple strip-shaped turbulence protrusions are integrally formed or bonded to the inner wall of the side air duct plate and facing the inner cavity of the air duct. These turbulence protrusions are used to break the boundary layer of the airflow on the inner wall of the air duct, prevent hot air from adhering to the wall and forming a vortex four-way drive, and reduce hot air swirling short circuit.

[0014] In the above technical solution, the turbulence protrusions are arranged at an angle of 30° to 40° along the airflow direction in the sealed air duct, and multiple turbulence protrusions are arranged in an alternating pattern of upper and lower rows. The protrusion height of the turbulence protrusions is 1 / 4 to 1 / 3 of the height of the air duct cavity.

[0015] In the above technical solution, the sealed air duct of the air duct and the fan side near the fan assembly are provided with a first air duct flow equalization plate, a second air duct flow equalization plate and a third air duct flow equalization plate arranged in layers.

[0016] In the above technical solution, a third air duct flow equalization plate, a second air duct flow equalization plate, and a first air duct flow equalization plate are installed sequentially from bottom to top in the valve group interface air duct. The first air duct flow equalization plate has the largest opening area, the third air duct flow equalization plate has the smallest opening area, and the opening area of ​​the second air duct flow equalization plate is between that of the first air duct flow equalization plate and the third air duct flow equalization plate. Different opening areas generate graded local wind resistance and balanced wind speed.

[0017] The positive effects of this invention are: by adopting the large-capacity air-cooled cabinet-type ice-melting device of this invention, since this invention includes a cabinet, valve group, fan assembly, sleeve and air duct, The valve assembly and air duct are both located inside the cabinet. Two sets of fan assemblies are respectively located on the front and rear sides of the cabinet to provide the forced convection power required for ice melting. The sleeve passes through the side of the cabinet and forms a sealed connection with the cabinet to realize high-voltage DC output. At the same time, the air duct connects the fan assembly and the valve assembly to guide the airflow in a directional manner and ensure that it all flows through the valve assembly to enhance heat exchange efficiency. The fan assembly forces the hot air inside the cabinet to be extracted and creates a negative pressure inside the cabinet, driving the external cold air to enter from the air inlet of the cabinet and flow through the air duct and valve group, carrying away the heat and then being discharged from the fan assembly, forming a stable forced convection cooling air path. This invention employs forced air cooling, eliminating the need for a water cooling system and related facilities. This solves the problem of some substations lacking space or water sources for water cooling chambers, enabling large-capacity de-icing devices to be successfully deployed in various restricted locations, significantly expanding the applicable scenarios for DC de-icing devices. This invention adopts a cabinet-type structure design, integrating core components such as valve groups, fans, air ducts, and bushings into a single cabinet. The overall footprint is significantly smaller than traditional water-cooling solutions, making it suitable for the compact layout requirements of substations. The air-cooled solution completely avoids problems such as pipe leakage, scaling, water pump failure, and antifreeze maintenance in water-cooled systems, significantly reducing the workload of daily inspections and periodic maintenance, reducing the risk of equipment downtime due to cooling system failures, and significantly improving the operational reliability of the de-icing device under harsh conditions such as low temperature, rain, and snow.

[0018] The air duct and fan assembly designed in this invention are used in combination to form a forced convection airflow path, ensuring that all cooling air flows over the valve assembly surface, avoiding airflow short-circuiting and heat accumulation, achieving efficient heat dissipation, and stably supporting the long-term operation of large-capacity ice-melting devices. This solves the bottleneck of traditional air-cooling solutions being unable to adapt to high-capacity power devices. The cabinet of this invention serves the dual functions of equipment protection and heat dissipation, effectively preventing dust and foreign object intrusion and ensuring the safety of internal high-voltage components. The air inlet, in conjunction with the sealed air duct, ensures the orderly entry and exit of cooling air while maintaining the required protection level. No additional protective cover is needed, resulting in a simple and highly practical structure. This invention eliminates the need for investment in equipment such as pipes, water pumps, heat exchangers, and water treatment devices for water cooling systems, and also eliminates the need for supporting civil engineering and installation projects, significantly reducing equipment procurement and engineering construction costs; at the same time, there are no additional costs for water treatment, antifreeze, and maintenance during long-term operation, making its overall economic efficiency far superior to traditional water cooling solutions.

[0019] Therefore, by optimizing the internal flow field structure, this invention achieves efficient and uniform ice-melting operations, effectively solving the problems of high energy consumption and slow speed of traditional ice-melting methods. It significantly improves the operational reliability and maintenance convenience of power facilities in icy and snowy weather, and can meet the air-cooling requirements of large-capacity ice-melting devices. It also has the advantages of low cost and small footprint. Attached Figure Description

[0020] Figure 1 This is a general schematic diagram of a specific embodiment of the present invention; Figure 2 This is a structural schematic diagram of the cabinet of the present invention; Figure 3 This is a schematic diagram of the valve assembly of the present invention; Figure 4 This is a schematic diagram of the structure of the fan assembly of the present invention; Figure 5 This is a schematic diagram of the air duct structure of the present invention; Figure 6 yes Figure 5 Another direction diagram; Among them: 1-cabinet, 2-valve assembly, 3-fan assembly, 4-sleeve, 5-air duct, 11-cabinet frame, 12-sealing plate, 13-louvers, 14-cabinet door, 15-inlet hole, 16-cable bracket, 21-power device, 22-heat sink, 23-capacitor, 24-resistor, 25-pressing mechanism, 31-fan, 32-volute, 33-guide shroud, 51-valve assembly interface air duct, 52-side air duct plate, 53-foam, 54-first air duct flow equalization plate, 55-second air duct flow equalization plate, 56-third air duct flow equalization plate, 57-turbulence protrusion. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] like Figure 1 , 2 As shown in Figures 3, 4, 5, and 6, a large-capacity air-cooled cabinet-type ice-melting device includes a cabinet body 1, a valve assembly 2, a fan assembly 3, a sleeve 4, and an air duct 5. Both the valve assembly 2 and the air duct 5 are located inside the cabinet 1. The two sets of fan assemblies 3 are respectively located on the front and rear sides of the cabinet 1 to provide the forced convection power required for ice melting. The sleeve 4 passes through the side of the cabinet 1 and forms a sealed connection with the cabinet 1 to realize the high-voltage DC output line. At the same time, the air duct 5 connects the fan assembly 3 and the valve assembly 2 to guide the airflow in a directional manner and ensure that it all flows through the valve assembly 2 to enhance heat exchange efficiency. The hot air inside the cabinet 1 is forcibly extracted by the fan assembly 3, and a negative pressure is formed inside the cabinet 1. This drives the external cold air to enter from the air inlet of the cabinet 1 and flow through the air duct 5 and the valve group 2. After carrying away the heat, the air is discharged from the fan assembly 3, forming a stable forced convection cooling air path.

[0024] The cabinet 1 of the present invention is equipped with fan assemblies 3 on both the front and rear sides, which can work simultaneously or serve as backups for each other, thereby improving the reliability of the device operation and avoiding the device overheating and shutdown due to the failure of a single fan.

[0025] Furthermore, such as Figure 2 As shown, in order to make the structure of the present invention more compact and occupy less space, the cabinet 1 is provided with two sets of valve groups 2, and the two sets of valve groups 2 share the air inlet of the cabinet 1 by being arranged back to back, so as to meet the heat dissipation of the two sets of valve groups at the same time. After the cooling air enters the cabinet, it flows through the radiator 22 of the two sets of valve groups 2 at the same time, realizing bidirectional heat dissipation, effectively compressing the lateral size of the device and improving the space utilization rate.

[0026] Furthermore, in order to facilitate the fixing of the valve group, the bottom of the cabinet 1 is provided with a valve group support frame for easy assembly and disassembly of the valve group, and the valve groups 2 are all fixed on the valve group support frame.

[0027] Furthermore, such as Figure 1 , 2 As shown, in order to make the structure of the present invention compact and the layout more reasonable, the cabinet 1 is a frame structure, which also has the functions of protection and heat dissipation. There is no need to set up an additional protective cover, the structure is compact and saves space.

[0028] Furthermore, such as Figure 2 As shown, the cabinet includes a cabinet frame 11, a sealing plate 12, louvers 13, a cabinet door 14, a cable inlet 15, and a cable bracket 16. The cabinet frame 11 is constructed from welded or bolted steel sections, providing structural support and installation reference. It also serves as the framework for the air duct, ensuring overall structural strength and sealing performance. The sealing plate 12 is fixed to the outside of the cabinet frame 11 by bolts, which is used to achieve protective sealing of the cabinet to prevent dust and foreign objects from entering. At the same time, it serves as the side wall of the air duct to guide the orderly flow of air. The cabinet door 14 is located on the front of the cabinet body 1 and is hinged to the sealing plate 12 on the front of the cabinet frame 11. The valve assembly 2 is installed and maintained through the inspection window of the cabinet door 14. The cabinet door 14 is fixed with louvers 13, which serve as the air inlet for the cabinet body 1. External cooling air enters the interior of the cabinet body 1 through the louvers 13 to dissipate heat for the valve assembly 2. The inlet hole 15 is located at the top or bottom of the cabinet 1 and is used for the entry of AC cable. The cable bracket 16 is fixed on the cabinet 1 and close to the inlet hole 15 to support and fix the AC cable.

[0029] This invention supports flexible cable entry methods. In addition to the bottom cable entry method used in this embodiment, a cable entry hole can also be opened on the top of the cabinet to achieve top cable entry, depending on the substation site layout requirements. Bottom entry: AC cable is introduced from the bottom entry hole 15 of the cabinet, fixed by the cable bracket 16, and connected to the valve group after wiring. It is suitable for substations with cable trench layout. Top entry: AC cables are introduced from the top of the cabinet, eliminating the need to reserve cable space at the bottom of the cabinet. This is suitable for scenarios with limited bottom space, saving layout space and improving the site adaptability of the device.

[0030] Furthermore, in order to facilitate the installation of the sleeve, realize the DC output line, and ensure the sealing of the joint, the side of the cabinet 1 is reserved with a mounting hole for installing the sleeve 4, and the sleeve 4 and the cabinet 1 are sealed with a rubber sealing ring to prevent air leakage or foreign objects from entering.

[0031] Furthermore, such as Figure 3 As shown, the valve assembly 2 includes a press-fitting mechanism 25 and multiple power units press-fitted together by the press-fitting mechanism 25. Each power unit includes a power device 21, a heat sink 22, a capacitor 23, and a resistor 24, ensuring the reliability of the electrical connection and the tightness of heat dissipation, and avoiding overheating problems caused by poor contact. The power device 21 is cooled by a heat sink 22. The capacitor 23 and resistor 24 are respectively disposed on both sides of the power device 21 and electrically connected to the corresponding connection terminals of the power device 21.

[0032] The valve assembly 2 described in this invention can be installed and maintained through the cabinet door 14 on the front of the cabinet. The pressure fitting mechanism 25 can realize the quick disassembly and assembly of the power unit, which facilitates the replacement of power devices or heat sinks and reduces the difficulty of maintenance.

[0033] Furthermore, such as Figure 4 As shown, in order to provide the forced convection power required for ice melting, the fan assembly 3 includes a fan 31, a volute 32, and a guide shroud 33. The fan 31 is fixed to the cabinet 1 through the volute 32, and the volute 32 and the cabinet are sealed together by a sealing gasket, so that the volute 32 and the cabinet 1 form a complete sealed air cavity to prevent air leakage and ensure the ventilation efficiency of the fan 31. The guide shroud 33 is fixed inside the air inlet of the volute 32.

[0034] The fan 31 described in this invention is a centrifugal fan. When working, the fan 31 forcibly extracts the hot air inside the cabinet through the volute 32, forming a negative pressure inside the cabinet, driving the external cold air to enter through the louvers 13, flow through the valve group radiator 22, carry away the heat, and then be discharged from the fan assembly 3, forming a stable forced convection cooling air path.

[0035] Furthermore, the air guide shroud 33 of the present invention is composed of an inner ring and a radial grid. The radial grid is obliquely arranged inside the air inlet of the volute 32 through the inner ring. The radial grid can collect the airflow from the duct, evenly distribute the air volume of the left and right cavities, disperse the vortex of the air inlet, straighten the airflow angle, and evenly send it into the centrifugal fan impeller, reduce the airflow deviation and wind noise, and reduce the air intake resistance of the fan.

[0036] Furthermore, such as Figure 5 As shown, to ensure the overall airtightness of the air duct, the air duct 5 consists of a valve group interface air duct 51, a side air duct plate 52, and foam 53. The valve group interface air duct 51 and the side air duct plate 52, together with the cabinet 1, form a complete airflow directional sealed air duct. The valve group interface air duct 51 is fixed to the radiator 22 of the valve group 2 and aligned with the air outlet of the radiator 22. The side air duct plate 52 is fixed to the inner wall of the cabinet 1 to form the side wall of the air duct. The valve group interface air duct 51 and the side air duct plate 52 are sealed by pressing with foam 53 to eliminate air duct gaps, prevent airflow short circuits, and buffer installation stress to avoid deformation and damage to the air duct components.

[0037] The foam 53 described in this invention can adaptively deform according to the installation tolerance of the valve assembly and the cabinet to achieve flexible sealing of the air duct interface, while buffering installation stress and preventing deformation and damage to the air duct components.

[0038] Furthermore, such as Figure 6 As shown, the inner wall of the side air duct plate 52 of the present invention is provided with multiple strip-shaped turbulence protrusions 57 integrally formed or bonded to the air duct cavity. These turbulence protrusions are used to break the boundary layer of the airflow on the inner wall of the air duct, prevent hot air from sticking to the wall and forming a vortex dead zone, straighten the turbulent airflow on the side wall, and reduce the hot air swirling short circuit.

[0039] Furthermore, the turbulence protrusions 57 are arranged at an angle of 30° to 40° along the airflow direction in the sealed air duct, and multiple turbulence protrusions 57 are arranged in staggered rows. The protrusion height of the turbulence protrusions 57 is 1 / 4 to 1 / 3 of the height of the inner cavity of the air duct 5.

[0040] Furthermore, such as Figure 6 As shown, in order to further improve the uniformity of airflow throughout the air duct, the air duct 5 is provided with a first air duct flow equalization plate 54, a second air duct flow equalization plate 55 and a third air duct flow equalization plate 56 arranged in layers inside the sealed air duct and near the fan 31 side of the fan assembly 3.

[0041] Furthermore, to improve airflow uniformity, the three flow equalization plates are designed with progressively different opening ratios, meaning the opening areas of the three duct plates are different, thus balancing the air velocity through the distribution of openings. Other duct openings far from the fan do not require flow equalization plates. Within the valve assembly interface duct 51, from bottom to top, a third duct flow equalization plate 56, a second duct flow equalization plate 55, and a first duct flow equalization plate 54 are installed sequentially. The first duct flow equalization plate 54 has the largest opening area, the third duct flow equalization plate 56 has the smallest opening area, and the opening area of ​​the second duct flow equalization plate 55 is between that of the first duct flow equalization plate 54 and the third duct flow equalization plate 56. These different opening areas create graded local wind resistance and balance the air velocity.

[0042] Because the suction force is greater near the fan outlet and weaker at the far outlet, the differentiated perforated plate forces the airflow near the fan to be throttled and the airflow at the far end to pass smoothly, balancing the air velocity at the top and bottom of the entire duct and at the near and far outlets, eliminating the flow deviation defect of the duct being blown by the near end and not blown by the far end; the pressure difference at the far end of the duct is uniform, so there is no need to install a flow equalization plate.

[0043] The specific working process of this invention is as follows: After the external cold air enters through the louvers 13 of the cabinet 1, it can only flow through the valve group interface air duct 51 and pass through the radiators 22 of the two back-to-back valve groups 2, and fully contact the radiator surface to remove the heat generated by the power devices. The heated air enters the sealed air duct composed of the side air duct plate 52 and the cabinet 1 through the valve group interface air duct 51, and is then guided to the fan assembly 3. Under the suction action of the fan assemblies 3 on the front and rear sides, it is forced out of the cabinet through the volute 32, forming a stable forced convection cooling air path, ensuring that 100% of the cooling air flows through the radiator surface, and improving the heat dissipation efficiency.

[0044] This invention employs forced air cooling, eliminating the need for a water cooling system and related facilities. It addresses the pain points of some substations lacking space for water cooling chambers or water sources, enabling large-capacity de-icing devices to be successfully deployed in various restricted locations, significantly expanding the applicable scenarios for DC de-icing devices.

[0045] This invention adopts a cabinet-type structure design, integrating core components such as valve groups, fans, air ducts, and bushings into the same cabinet; two sets of valve groups are arranged back to back and share an air inlet, effectively compressing the lateral size of the device; at the same time, it supports flexible top or bottom wiring, eliminating the need for additional space for the installation and maintenance of water-cooled equipment, and the overall footprint is much smaller than traditional water-cooling solutions, making it suitable for the compact layout requirements of substations.

[0046] The air-cooling solution of this invention completely avoids problems such as pipe leakage, scaling, water pump failure, and antifreeze maintenance in water-cooling systems, significantly reduces the workload of daily inspections and periodic maintenance, reduces the risk of equipment downtime due to cooling system failures, and significantly improves the operational reliability of the ice-melting device under harsh conditions such as low temperature, rain, and snow.

[0047] The device of this invention uses a sealed air duct design to seal the valve group interface air duct, side air duct plate and foam together. Combined with the forced convection air path formed by the front and rear fan components, it ensures that all cooling air flows through the surface of the heat sink, avoids airflow short circuit and heat accumulation, achieves efficient heat dissipation, can stably support the long-term operation of large-capacity ice melting device, and solves the bottleneck of traditional air cooling solutions being difficult to adapt to large-capacity power devices.

[0048] The cabinet of this invention serves the dual functions of equipment protection and heat dissipation duct. The external sealing plate and sealing treatment can effectively prevent dust and foreign object intrusion, ensuring the safety of internal high-pressure components. The combination of louvers and sealed air cavity can achieve orderly entry and exit of cooling air while ensuring the protection level. There is no need to set up an additional protective cover. The structure is simple and highly practical.

[0049] This invention eliminates the need for investment in equipment such as pipes, water pumps, heat exchangers, and water treatment devices for water cooling systems, and also eliminates the need for supporting civil engineering and installation projects, significantly reducing equipment procurement and engineering construction costs; at the same time, there are no additional costs for water treatment, antifreeze, and maintenance during long-term operation, making its overall economic efficiency far superior to traditional water cooling solutions.

[0050] In summary, this invention optimizes the internal flow field structure to achieve efficient and uniform ice-melting operations, effectively solving the problems of high energy consumption and slow speed of traditional ice-melting methods. It significantly improves the operational reliability and maintenance convenience of power facilities in icy and snowy weather, and can meet the air-cooling requirements of large-capacity ice-melting devices. It also has the advantages of low cost and small footprint.

[0051] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A large-capacity air-cooled cabinet-type ice-melting device, characterized in that: It includes a cabinet (1), valve group (2), fan assembly (3), sleeve (4) and air duct (5). The valve assembly (2) and the air duct (5) are both located inside the cabinet (1). The two sets of fan assemblies (3) are respectively located on the front and rear sides of the cabinet (1) to provide the forced convection power required for ice melting. The sleeve (4) passes through the side of the cabinet (1) and forms a sealed connection with the cabinet (1) to realize the high-voltage DC output line. At the same time, the air duct (5) connects the fan assembly (3) and the valve assembly (2) to guide the airflow to flow in a directional manner and to flow entirely through the valve assembly (2) to enhance the heat exchange efficiency. The hot air inside the cabinet (1) is forcibly extracted by the fan assembly (3), and a negative pressure is formed inside the cabinet (1). This drives the external cold air to enter from the air inlet of the cabinet (1) and flow through the air duct (5) and the valve group (2) to carry away the heat and then be discharged from the fan assembly (3), forming a stable forced convection cooling air path.

2. The large-capacity air-cooled cabinet-type ice-melting device according to claim 1, characterized in that: The cabinet (1) is equipped with two sets of valve groups (2), and the two sets of valve groups (2) share the air inlet of the cabinet (1) by being arranged back to back, so as to meet the heat dissipation of the two sets of valve groups at the same time.

3. The large-capacity air-cooled cabinet-type ice-melting device according to claim 1 or 2, characterized in that: The bottom of the cabinet (1) is provided with a valve group support frame for easy assembly and disassembly of the valve group, and the valve group (2) is fixed on the valve group support frame.

4. The large-capacity air-cooled cabinet-type ice-melting device according to claim 1, characterized in that: The cabinet (1) is a frame structure and has both protection and heat dissipation functions. The cabinet includes a cabinet frame (11), a sealing plate (12), louvers (13), a cabinet door (14), a cable inlet (15), and a cable bracket (16). The cabinet frame (11) is used to provide structural support and installation reference, and at the same time serves as the skeleton of the air duct to ensure the overall structural strength and sealing performance. The sealing plate (12) is fixed to the outside of the cabinet frame (11) to achieve protective sealing of the cabinet, prevent dust and foreign objects from entering, and at the same time serve as the side wall of the air duct to guide the orderly flow of air. The cabinet door (14) is located on the front of the cabinet (1) and is hinged to the sealing plate (12) on the front of the cabinet frame (11). The valve assembly (2) is installed and maintained through the inspection window of the cabinet door (14). The cabinet door (14) is fixed with louvers (13), which serve as the air inlet of the cabinet (1). External cooling air enters the cabinet (1) through the louvers (13) to dissipate heat from the valve assembly (2). The inlet hole (15) is opened at the top or bottom of the cabinet (1) for the inlet of AC cable. The cable bracket (16) is fixed on the cabinet (1) and close to the inlet hole (15) for supporting and fixing the AC cable.

5. The large-capacity air-cooled cabinet-type ice-melting device according to claim 1, characterized in that: The side of the cabinet (1) has a reserved mounting hole for installing the sleeve (4), and the sleeve (4) and the cabinet (1) are sealed with a rubber sealing ring to prevent air leakage or foreign objects from entering.

6. The large-capacity air-cooled cabinet-type ice-melting device according to claim 1, characterized in that: The valve assembly (2) includes a press-fitting mechanism (25) and multiple power units press-fitted together by the press-fitting mechanism (25). Each power unit includes a power device (21), a heat sink (22), a capacitor (23), and a resistor (24). The power device (21) is cooled by a heat sink (22). The capacitor (23) and resistor (24) are respectively disposed on both sides of the power device (21) and electrically connected to the corresponding connection terminal of the power device (21).

7. The large-capacity air-cooled cabinet-type ice-melting device according to claim 1, characterized in that: The fan assembly (3) includes a fan (31), a volute (32) and a flow guide (33). The fan (31) is fixed to the cabinet (1) through the volute (32), and the volute (32) and the cabinet (1) are sealed together by a sealing gasket, so that the volute (32) and the cabinet (1) form a complete sealed air cavity to prevent air leakage. The flow guide (33) is fixed inside the air inlet of the volute (32).

8. The large-capacity air-cooled cabinet-type ice-melting device according to claim 7, characterized in that: The air guide (33) is composed of an inner ring and a radial grid. The radial grid is obliquely arranged inside the air inlet of the volute (32) through the inner ring, and the radial grid is used to reduce airflow deviation and wind noise, and reduce the air intake resistance of the fan.

9. The large-capacity air-cooled cabinet-type ice-melting device according to claim 1, characterized in that: The air duct (5) consists of a valve group interface air duct (51), a side air duct plate (52), and foam (53). The valve group interface air duct (51) and the side air duct plate (52), together with the cabinet (1), form a complete sealed air duct for directional airflow. The valve group interface air duct (51) is fixed on the radiator (22) of the valve group (2) and aligned with the air outlet of the radiator (22). The side air duct plate (52) is fixed on the inner wall of the cabinet (1) to form the side wall of the air duct. The valve group interface air duct (51) and the side air duct plate (52) are sealed by foam (53) to eliminate air duct gaps, prevent airflow short circuits, and buffer installation stress to avoid deformation and damage to air duct components.

10. The large-capacity air-cooled cabinet-type ice-melting device according to claim 9, characterized in that: The inner wall of the side air duct plate (52) is provided with multiple strip-shaped turbulence protrusions (57) integrally formed or bonded to the air duct cavity. These turbulence protrusions are used to break the airflow boundary layer on the inner wall of the air duct, prevent hot air from forming a vortex four-wheel drive by adhering to the wall, and reduce hot air swirling short circuit.

11. The large-capacity air-cooled cabinet-type ice-melting device according to claim 10, characterized in that: The turbulence protrusions (57) are arranged at an angle of 30° to 40° in the direction of airflow in the sealed air duct, and multiple turbulence protrusions (57) are arranged in an alternating pattern of upper and lower rows. The protrusion height of the turbulence protrusions (57) is 1 / 4 to 1 / 3 of the height of the inner cavity of the air duct (5).

12. The large-capacity air-cooled cabinet-type ice-melting device according to claim 9, characterized in that: The air duct (5) has a first air duct flow equalization plate (54), a second air duct flow equalization plate (55) and a third air duct flow equalization plate (56) arranged in layers on the side of the fan (31) near the fan assembly (3).

13. The large-capacity air-cooled cabinet-type ice-melting device according to claim 12, characterized in that: The valve group interface air duct (51) is installed with a third air duct flow equalization plate (56), a second air duct flow equalization plate (55) and a first air duct flow equalization plate (54) in sequence from bottom to top. The first air duct flow equalization plate (54) has the largest opening area, the third air duct flow equalization plate (56) has the smallest opening area, and the opening area of ​​the second air duct flow equalization plate (55) is between the first air duct flow equalization plate (54) and the third air duct flow equalization plate (56). The different opening areas generate graded local wind resistance and balanced wind speed.

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