Aiming cooling power distribution cabinet based on combination of water cooling and air cooling

Abstract

The invention belongs to the technical field of power distribution cabinets, and particularly relates to a targeted cooling power distribution cabinet based on water-cooling and air-cooling combination, which comprises a cabinet body, a protective door is assembled on the side wall of the cabinet body, a plurality of electrical components are assembled in an inner cavity of the cabinet body, and a rectangular pipe is fixedly mounted on the inner wall of the cabinet body. The end face of the rectangular pipe is fixedly connected with a first connector, an air inlet pipe is arranged in an inner cavity of the rectangular pipe, one end of the air inlet pipe penetrates through the rectangular pipe and is fixedly connected with a second connector, and the inner wall of the rectangular pipe is fixedly connected with a partition plate. An inner cavity of the air inlet pipe is an air cooling cavity, a water cooling cavity is formed between the air inlet pipe and the rectangular pipe, a fire extinguishing medium channel is formed between the side, away from the air inlet pipe, of the partition plate and the inner wall of the rectangular pipe, and a third connector is fixedly connected to the position, located on the fire extinguishing medium channel, of the end face of the rectangular pipe. The system can achieve the functions of targeted cooling, high efficiency, energy saving and fire extinguishing integration, facilitates the improvement of the operation reliability of power distribution network equipment, and reduces the operation and maintenance cost.

Description

Technical Field

[0001] This invention belongs to the field of power distribution cabinet technology, specifically relating to a targeted cooling power distribution cabinet based on a combination of water cooling and air cooling. Background Technology

[0002] With the development of industrial automation, data center consolidation, and the large-scale development of the new energy industry, intelligent distribution cabinets are gradually replacing traditional distribution cabinets and becoming the core control unit of the power system. Compared with traditional distribution cabinets, intelligent distribution cabinets not only integrate basic power components such as circuit breakers, relays, and frequency converters, but also add intelligent monitoring modules (such as temperature sensors, current sensors, and humidity sensors), data transmission modules (such as 4G / 5G and LoRa modules), and automatic control modules (such as PLC controllers and smart gateways). They can collect the temperature and humidity inside the cabinet and the operating parameters of the components in real time, and realize fault early warning and parameter control through a remote platform, which greatly improves the operation and maintenance efficiency and reliability of the power system.

[0003] Meanwhile, the cabinets of power distribution cabinets are mostly enclosed or semi-enclosed structures, making it difficult for internal heat to dissipate quickly. If heat accumulates, it will lead to a decrease in the insulation performance of components and a shortened service life. In severe cases, it may even cause safety accidents such as short circuits and fires.

[0004] To address the heat dissipation problem of distribution cabinets, existing technologies mostly employ full-area air cooling or full-area water cooling solutions. Full-area air cooling achieves air circulation by installing fans on the cabinet, but it suffers from poor targeted cooling, failing to precisely cool high-heat areas. Furthermore, cold air easily forms eddies within the cabinet, resulting in low heat dissipation efficiency. Full-area water cooling achieves overall cooling by laying water-cooled pipes within the cabinet. While its cooling effect is superior to air cooling, it suffers from high energy consumption, complex piping layouts, and condensation during coolant circulation, threatening the insulation safety of electrical components. In addition, the existing distribution cabinet's heat dissipation system and fire suppression system are independent. When a localized fire occurs within the internal components, the extinguishing agent cannot quickly and accurately reach the fire source, easily causing the fire to spread and further expanding the area of ​​equipment damage. Summary of the Invention

[0005] The purpose of this invention is to provide a targeted cooling distribution cabinet based on a combination of water cooling and air cooling, which can achieve targeted cooling, high efficiency and energy saving, and integrated fire extinguishing function, thereby improving the operational reliability of power distribution network equipment and reducing operation and maintenance costs.

[0006] The specific technical solution adopted by this invention is as follows: A targeted cooling distribution cabinet based on a combination of water cooling and air cooling includes a cabinet body, a protective door fitted on the side wall of the cabinet body, multiple electrical components fitted in the inner cavity of the cabinet body, a rectangular tube fixedly installed on the inner wall of the cabinet body, a first connector fixedly connected to the end face of the rectangular tube, an air inlet pipe provided in the inner cavity of the rectangular tube, one end of the air inlet pipe passing through the rectangular tube and fixedly connected to a second connector, and a partition plate fixedly connected to the inner wall of the rectangular tube. The inner cavity of the air inlet pipe is an air-cooled cavity, the space between the air inlet pipe and the rectangular tube is a water-cooled cavity, the space between the partition plate away from the air inlet pipe and the inner wall of the rectangular tube is a fire extinguishing medium channel, and a third connector is fixedly connected to the end face of the rectangular tube at the fire extinguishing medium channel. Multiple connecting pipes are fixedly connected to the top surface of the air inlet pipe. A hollow shell is assembled on the top surface of the connecting pipe. Multiple shaped plates are fixedly connected to the top surface of the hollow shell. The shaped plates are hollow structures. Multiple heat-conducting and cooling components are provided on the side walls of the shaped plates. A conduction control component is provided between the hollow shell and the fire extinguishing medium channel, and auxiliary cooling components are provided on the side walls of the connecting pipes.

[0007] Furthermore, a water-cooling connector is fixedly connected to the side wall of the rectangular tube between the connecting tubes. The water-cooling connector communicates with the water-cooling cavity, and a bolt is internally threaded onto the water-cooling connector.

[0008] Furthermore, the heat-conducting and cooling component includes two fixed plates fixedly connected to the side wall of the plastic plate, a heat-conducting hollow plate is provided between the two fixed plates, a pin is fixedly connected to the side wall of the heat-conducting hollow plate, the other end of the pin is rotatably connected to the fixed plate, a torsion spring is assembled on the side wall of the pin, a plurality of air outlet holes are opened on the side wall of the heat-conducting hollow plate, and a flexible hose is fixedly connected to the side wall of the heat-conducting hollow plate, the other end of the flexible hose is connected to the inner cavity of the plastic plate.

[0009] Furthermore, a temperature sensor is installed on the side wall of the heat-conducting hollow plate.

[0010] Furthermore, a metal corrugated pipe is fixedly connected to the side wall of the shaped plate near the bottom end.

[0011] Furthermore, the flow control component includes a flow guide pipe fixedly connected between the hollow shell and the rectangular tube. The flow guide pipe is connected to the hollow shell and the fire extinguishing medium channel respectively. A first electric valve is installed on the side wall of the flow guide pipe near the bottom end, and a second electric valve is installed on the side wall of the connecting pipe.

[0012] Furthermore, the auxiliary cooling component includes a rotating shaft rotatably connected to the inner wall of the connecting pipe. A first impeller is fixedly connected to the side wall of the rotating shaft. The other end of the rotating shaft passes through the connecting pipe and is fixedly connected to a second impeller. A cover is fixedly connected to the side wall of the connecting pipe outside the second impeller. An air inlet pipe and an air outlet pipe are fixedly connected to the side wall of the cover, respectively. Heat dissipation fins are fixedly connected to the side wall of the rectangular tube. The air outlet pipe is opposite to the heat dissipation fins, and the heat dissipation fins are opposite to the heat dissipation holes of the cabinet.

[0013] Furthermore, a tapered pipe is fixedly connected to the end face of the air outlet pipe.

[0014] Furthermore, the material of the shaped plate is any one of copper, aluminum, or alloy.

[0015] The technical effects achieved by this invention are as follows: The present invention discloses a targeted cooling distribution cabinet based on a combination of water cooling and air cooling. By setting a shapeable plate, the shape can be flexibly adjusted according to the position and heat generation of electrical components to achieve a tight fit with the surface of the components. At the same time, the heat-conducting hollow plate is tightly pressed against the surface of the components under the action of torsion springs. Combined with the pre-cooling airflow blown out by the air outlet, a dual cooling mode of heat conduction and heat absorption combined with airflow purging is formed to accurately cool the high-heat area.

[0016] This invention discloses a targeted cooling distribution cabinet based on a combination of water and air cooling. It features an independent fire extinguishing medium channel within a rectangular tube, linked to a temperature sensor via a conduction control component. When the surface temperature of an electrical component exceeds a critical value, the temperature sensor triggers the opening of a first electric valve. The fire extinguishing medium then flows through a guide pipe, hollow shell, and plastic plate to directly act on the high-temperature or flammable component, achieving targeted fire suppression and preventing the spread of fire. Simultaneously, the fire extinguishing medium uses non-conductive media such as perfluorohexanone and heptafluoropropane, ensuring no secondary damage to electrical components during fire suppression and guaranteeing safe equipment operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is the present invention. Figure 2 A structural diagram from another perspective; Figure 4 This is the present invention. Figure 2 A sectional side view; Figure 5 This is a schematic diagram of the structure of the heat-conducting hollow plate of the present invention; Figure 6 This is a schematic diagram showing the disassembled structure of the auxiliary cooling component of the present invention.

[0018] The attached diagram lists the components represented by each number as follows: 1. Cabinet; 2. Protective door; 3. Electrical components; 4. Rectangular tube; 5. Air inlet duct; 6. Partition plate; 7. Third connector; 8. Second connector; 9. First connector; 10. Connecting pipe; 11. Water-cooled connector; 12. Bolt; 13. Hollow shell; 14. Molded plate; 15. Fixing plate; 16. Heat-conducting hollow plate; 17. Pin; 18. Torsion spring; 19. Flexible hose; 20. Air outlet; 21. Temperature sensor; 22. Corrugated metal pipe; 23. Guide pipe; 24. First electric valve; 25. Second electric valve; 26. First impeller; 27. Shaft; 28. Second impeller; 29. ​​Cover; 30. Air inlet duct; 31. Air outlet duct; 32. Conical tube; 33. Heat dissipation fins. Detailed Implementation

[0019] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0020] Example 1: like Figures 1-6 As shown, a targeted cooling distribution cabinet based on water-cooling and air-cooling combination includes a cabinet body 1, a protective door 2 mounted on the side wall of the cabinet body 1, multiple electrical components 3 mounted in the inner cavity of the cabinet body 1, a rectangular tube 4 fixedly installed on the inner wall of the cabinet body 1, a first connector 9 fixedly connected to the end face of the rectangular tube 4, an air inlet pipe 5 provided in the inner cavity of the rectangular tube 4, one end of the air inlet pipe 5 passing through the rectangular tube 4 and fixedly connected to a second connector 8, and a partition plate 6 fixedly connected to the inner wall of the rectangular tube 4. The inner cavity of the air inlet duct 5 is an air-cooled cavity, and the space between the air inlet duct 5 and the rectangular tube 4 is a water-cooled cavity. The space between the partition plate 6 on the side away from the air inlet duct 5 and the inner wall of the rectangular tube 4 is a fire extinguishing medium channel. The end face of the rectangular tube 4 is fixedly connected to the fire extinguishing medium channel with a third connector 7. Multiple connecting pipes 10 are fixedly connected to the top surface of the air inlet duct 5. A hollow shell 13 is fitted onto the top surface of each connecting pipe 10. Multiple shaped plates 14 are fixedly connected to the top surface of the hollow shell 13. The shaped plates 14 are hollow structures, and multiple heat-conducting and cooling components are provided on the side walls of each shaped plate 14. The shaped plates 14 are made of any one of copper, aluminum, or alloy. Copper, aluminum, and alloys have excellent thermal conductivity, which can quickly absorb heat from the surface of the electrical components 3. At the same time, the materials are highly malleable, making it easy to flexibly shape them according to the shape of the components and improve the fit.

[0021] A conduction control component is provided between the hollow shell 13 and the fire extinguishing medium channel, and auxiliary cooling components are provided on the side walls of the connecting pipe 10.

[0022] like Figure 4 and Figure 5As shown, the heat-conducting and cooling assembly includes two fixed plates 15 fixedly connected to the side wall of the plastic plate 14, a heat-conducting hollow plate 16 is provided between the two fixed plates 15, a pin 17 is fixedly connected to the side wall of the heat-conducting hollow plate 16, the other end of the pin 17 is rotatably connected to the fixed plate 15, a torsion spring 18 is assembled on the side wall of the pin 17, a number of air vents 20 are opened on the side wall of the heat-conducting hollow plate 16, and a flexible hose 19 is fixedly connected to the side wall of the heat-conducting hollow plate 16, the other end of the flexible hose 19 is connected to the inner cavity of the plastic plate 14.

[0023] The spring 18's rebound force allows the heat-conducting hollow plate 16 to press tightly against the surface of the electrical component 3, increasing the heat-conducting contact area and improving heat absorption efficiency. The flexible hose 19, with its bendable properties, can deform synchronously with the angle adjustment of the heat-conducting hollow plate 16, ensuring continuous cooling airflow. Furthermore, the heat-conducting hollow plate 16 is preferably made of ceramic, which possesses good thermal conductivity but lacks electrical conductivity.

[0024] like Figures 2-3 As shown, a metal corrugated pipe 22 is fixedly connected to the side wall of the shaped plate 14 near the bottom. The metal corrugated pipe 22 has flexible shaping characteristics, which can adapt to the deformation requirements of the shaped plate 14, and at the same time enhance the sealing of the connection between the shaped plate 14 and the hollow shell 13 to prevent air leakage.

[0025] Example 2: Based on Embodiment 1, this embodiment discloses a water-cooling method for the shaping plate 14: like Figure 2 and Figure 3 As shown, a water-cooling connector 11 is fixedly connected to the side wall of the rectangular tube 4 between the connecting tubes 10. The water-cooling connector 11 is connected to the water-cooling cavity, and a bolt 12 is threaded into the water-cooling connector 11.

[0026] Specifically, the difference between water cooling in Embodiment 2 and air cooling in Embodiment 1 is that no air vents 20 are opened on the heat-conducting hollow plate 16, so water cannot be discharged. However, the inner cavity of the plastic plate 14 is provided with two water channels, one inlet and one outlet. The heat-conducting hollow plate 16 is connected to the two water channels through two hoses 19, so that the water can circulate in the plastic plate 14 and the heat-conducting hollow plate 16, promoting heat dissipation and cooling.

[0027] In addition, the water-cooled connector 11 can serve as a spare interface for the water-cooled cavity, facilitating the replacement, replenishment, or drainage of the coolant in the water-cooled cavity, thereby improving the ease of maintenance of the water-cooling system. When not in use, the bolt 12 can seal the water-cooled connector 11 to prevent coolant leakage during normal operation of the water-cooled cavity, ensuring the safe operation of the electrical components 3 inside the cabinet 1.

[0028] Example 3: Based on Examples 1 and 2, this example is used to assist in cooling the coolant inside the rectangular tube 4: like Figure 6 As shown, the auxiliary cooling component includes a rotating shaft 27 rotatably connected to the inner wall of the connecting pipe 10. A first impeller 26 is fixedly connected to the side wall of the rotating shaft 27. The other end of the rotating shaft 27 passes through the connecting pipe 10 and is fixedly connected to a second impeller 28. A cover 29 is fixedly connected to the side wall of the connecting pipe 10 outside the second impeller 28. An air inlet pipe 30 and an air outlet pipe 31 are fixedly connected to the side wall of the cover 29. A heat dissipation fin 33 is fixedly connected to the side wall of the rectangular pipe 4. The air outlet pipe 31 is opposite to the heat dissipation fin 33, and the heat dissipation fin 33 is opposite to the heat dissipation holes of the cabinet 1. A tapered pipe 32 is fixedly connected to the end face of the air outlet pipe 31.

[0029] When the cooling airflow passes through the connecting pipe 10, it can drive the first impeller 26 to rotate, and then drive the second impeller 28 to rotate synchronously through the rotating shaft 27. The rotation of the second impeller 28 can accelerate the airflow inside the casing 29, and draw in outside cold air through the air inlet pipe 30 to blow on the heat dissipation fins 33 on the side wall of the rectangular tube 4, thereby improving the heat dissipation efficiency of the coolant in the water-cooled cavity. No additional power input is required, achieving energy-saving operation. The tapered tube 32 can guide and pressurize the blown airflow, enhance the contact effect between the airflow and the heat dissipation fins 33, and improve the heat dissipation efficiency.

[0030] Secondly, the heat dissipation fins 33 can be positioned close to the heat dissipation holes of the cabinet 1, and the air outlet duct 31 can be directed in the opposite direction to the heat dissipation holes, so that the hot air on the heat dissipation fins 33 can be directly discharged from the heat dissipation holes. In addition, the heat dissipation fins 33 increase the contact area between the rectangular tube 4 and the air, which can accelerate the heat dissipation of the coolant in the water cooling chamber and ensure the cooling effect of the coolant circulation.

[0031] Example 4: Based on Embodiment 1, this embodiment, in order to further ensure the safety of operation inside cabinet 1, specifically explains the targeted fire extinguishing principle: like Figure 4 As shown, the flow control assembly includes a flow guide pipe 23 fixedly connected between the hollow shell 13 and the rectangular tube 4. The flow guide pipe 23 is connected to the hollow shell 13 and the fire extinguishing medium channel respectively. A first electric valve 24 is installed on the side wall of the flow guide pipe 23 near the bottom end, and a second electric valve 25 is installed on the side wall of the connecting pipe 10.

[0032] like Figure 5 As shown, a temperature sensor 21 is installed on the side wall of the heat-conducting hollow plate 16.

[0033] In this embodiment, the guide pipe 23 provides a precise delivery channel for the extinguishing medium, which can be directly delivered to the plastic plate 14 to achieve targeted extinguishing of the fire-prone components. The first electric valve 24 can precisely control the opening and closing of the extinguishing medium channel, opening only when the temperature exceeds the standard to avoid unnecessary consumption of the extinguishing medium. The second electric valve 25 can control the airflow of a single connecting pipe 10 according to the temperature requirements, realizing differentiated cooling control of components in different areas. Both the first electric valve 24 and the second electric valve 25 are controlled by the temperature sensor 21, which can be a temperature sensor, a micro sensor, or other temperature sensing unit.

[0034] The working principle of this invention is as follows: First, based on the position and heating characteristics of the electrical components 3 inside the cabinet 1, the molding plate 14 is shaped to fit the surface of the components, and an insulating film is used to isolate the molding plate 14 from the components to avoid the risk of short circuit. Then, the heat-conducting hollow plate 16 is rotated open, causing the torsion spring 18 to compress and store force. After being released, the torsion spring 18 rebounds, causing the heat-conducting hollow plate 16 to tightly abut against the surface of the electrical components 3. The external fan is started, and the airflow enters the air-cooling cavity of the air inlet pipe 5 through the second connector 8. At the same time, the external water pump injects ethylene glycol aqueous solution coolant into the water-cooling cavity between the rectangular pipe 4 and the air inlet pipe 5 through the first connector 9. The coolant pre-cools the airflow in the air-cooling cavity. The pre-cooled airflow enters the hollow shell 13 through the connecting pipe 10, and then is distributed to multiple molding plates 14. Subsequently, it enters the heat-conducting hollow plate 16 through the hose 19, and finally blows out from the air outlet 20 to specifically blow and cool the electrical components 3. When the airflow passes through the connecting pipe 10, it drives the first impeller 26 on the rotating shaft 27 to rotate. The rotating shaft 27 simultaneously drives the second impeller 28 inside the casing 29 to rotate. The second impeller 28 draws in outside cold air through the air inlet pipe 30. After being guided by the air outlet pipe 31 and the conical pipe 32, it blows the heat dissipation fins 33 on the side wall of the rectangular pipe 4, accelerating the heat dissipation of the coolant in the water-cooled cavity. The coolant is continuously cooled by circulating through the external water tank. When the electrical component 3 malfunctions and causes its surface temperature to rise, the temperature sensor 21 on the side wall of the heat-conducting hollow plate 16 monitors the temperature data in real time. When the temperature exceeds the preset critical value, the temperature sensor 21 triggers the first electric valve 24 to open, and at the same time the second electric valve 25 in the corresponding area closes, stopping the airflow. The perfluorohexanone or heptafluoropropane extinguishing medium in the external fire extinguishing pipeline enters the extinguishing medium channel in the rectangular tube 4 through the third connector 7, and then enters the hollow shell 13 through the guide pipe 23. Subsequently, it is transported to the heat-conducting hollow plate 16 through the plastic plate 14, directly acting on the surface of the high-temperature or flammable electrical component 3 to achieve targeted fire extinguishing and prevent the spread of fire.

[0035] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A targeted cooling distribution cabinet based on a combination of water cooling and air cooling, comprising a cabinet body (1), wherein a protective door (2) is fitted on the side wall of the cabinet body (1), and a plurality of electrical components (3) are fitted inside the cabinet body (1), characterized in that: A rectangular tube (4) is fixedly installed on the inner wall of the cabinet (1). A first connector (9) is fixedly connected to the end face of the rectangular tube (4). An air inlet pipe (5) is provided in the inner cavity of the rectangular tube (4). One end of the air inlet pipe (5) passes through the rectangular tube (4) and is fixedly connected to a second connector (8). A partition plate (6) is fixedly connected to the inner wall of the rectangular tube (4). The inner cavity of the air inlet pipe (5) is an air-cooled cavity, and the space between the air inlet pipe (5) and the rectangular pipe (4) is a water-cooled cavity. The space between the partition plate (6) away from the air inlet pipe (5) and the inner wall of the rectangular pipe (4) is a fire extinguishing medium channel. The end face of the rectangular pipe (4) is fixedly connected to the fire extinguishing medium channel with a third connector (7). The top surface of the air inlet pipe (5) is fixedly connected to multiple connecting pipes (10), the top surface of the connecting pipe (10) is fitted with a hollow shell (13), the top surface of the hollow shell (13) is fixedly connected to multiple plastic plates (14), the plastic plates (14) are hollow structures, and the side walls of the plastic plates (14) are provided with multiple heat conduction and cooling components. A conduction control component is provided between the hollow shell (13) and the fire extinguishing medium channel, and auxiliary cooling components are provided on the side walls of the connecting pipe (10).

2. The targeted cooling distribution cabinet based on a combination of water cooling and air cooling as described in claim 1, characterized in that: The side wall of the rectangular tube (4) is fixedly connected to a water-cooled connector (11) between the connecting tubes (10). The water-cooled connector (11) is connected to the water-cooled cavity. The water-cooled connector (11) is internally threaded with a bolt (12).

3. A targeted cooling distribution cabinet based on a combination of water-cooling and air-cooling as described in claim 1, characterized in that: The heat-conducting and cooling assembly includes two fixed plates (15) fixedly connected to the side wall of the plastic plate (14), a heat-conducting hollow plate (16) is provided between the two fixed plates (15), a pin (17) is fixedly connected to the side wall of the heat-conducting hollow plate (16), the other end of the pin (17) is rotatably connected to the fixed plate (15), a torsion spring (18) is assembled on the side wall of the pin (17), a number of air outlets (20) are opened on the side wall of the heat-conducting hollow plate (16), a hose (19) is fixedly connected to the side wall of the heat-conducting hollow plate (16), and the other end of the hose (19) is connected to the inner cavity of the plastic plate (14).

4. A targeted cooling distribution cabinet based on a combination of water-cooling and air-cooling as described in claim 3, characterized in that: A temperature sensor (21) is installed on the side wall of the heat-conducting hollow plate (16).

5. A targeted cooling distribution cabinet based on a combination of water-cooling and air-cooling as described in claim 1, characterized in that: A metal corrugated pipe (22) is fixedly connected to the side wall of the shaped plate (14) near the bottom.

6. A targeted cooling distribution cabinet based on a combination of water-cooling and air-cooling as described in claim 1, characterized in that: The conduction control component includes a flow guide pipe (23) fixedly connected between the hollow shell (13) and the rectangular tube (4). The flow guide pipe (23) is connected to the hollow shell (13) and the fire extinguishing medium channel respectively. A first electric valve (24) is installed on the side wall of the flow guide pipe (23) near the bottom end, and a second electric valve (25) is installed on the side wall of the connecting pipe (10).

7. A targeted cooling distribution cabinet based on a combination of water-cooling and air-cooling as described in claim 1, characterized in that: The auxiliary cooling component includes a rotating shaft (27) rotatably connected to the inner wall of the connecting pipe (10). A first impeller (26) is fixedly connected to the side wall of the rotating shaft (27). The other end of the rotating shaft (27) passes through the connecting pipe (10) and is fixedly connected to a second impeller (28). A cover (29) is fixedly connected to the side wall of the connecting pipe (10) outside the second impeller (28). An air inlet pipe (30) and an air outlet pipe (31) are fixedly connected to the side wall of the cover (29). A heat dissipation fin (33) is fixedly connected to the side wall of the rectangular tube (4). The air outlet pipe (31) is opposite to the heat dissipation fin (33). The heat dissipation fin (33) is opposite to the heat dissipation hole of the cabinet (1).

8. A targeted cooling distribution cabinet based on a combination of water-cooling and air-cooling as described in claim 7, characterized in that: A tapered pipe (32) is fixedly connected to the end face of the air outlet pipe (31).

9. A targeted cooling distribution cabinet based on a combination of water-cooling and air-cooling as described in claim 1, characterized in that: The material of the shaped plate (14) is any one of copper, aluminum, or alloy.

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