Cabinet and converter

Abstract

The equipment cabinet comprises a cabinet body, an air guide cylinder and a cooling fan, the cabinet body is provided with a first air inlet and a first air outlet, the first air inlet is communicated with a wind power tower cylinder and achieves air inlet, the first air outlet is formed in the bottom face of the cabinet body, and a cooling air channel from the first air inlet to the first air outlet is formed in the cabinet body. The second air inlet of the air guide cylinder is communicated with the first air outlet, the second air outlet of the air guide cylinder is communicated with the outside of the wind power tower cylinder, the air guide cylinder is directly arranged below the cabinet body, and heat in the cabinet body can be directly guided and discharged out of the wind power tower cylinder without passing through the horizontal circumferential position of the cabinet body. The heat is prevented from being gathered in the wind power tower drum to influence the normal operation of electronic devices in the cabinet body, and the lower part of the cabinet body is usually not used as an operation and maintenance space, so that the air duct arranged at the bottom of the cabinet body basically does not influence the operation and maintenance of the cabinet body. The cooling fan is used for driving air flow to flow into the air guide cylinder through the cooling air channel until heat is discharged to the outside.

Description

A cabinet and converter Technical Field

[0001] This application relates to the field of converter technology, and more specifically, to a cabinet and a converter. Background Technology

[0002] Currently, some converter cabinets use a combination of air ducts and shrouds for heat dissipation. However, this solution occupies a significant amount of space for maintenance, causing inconvenience and increasing maintenance costs. Therefore, how to effectively reduce the maintenance costs of converters has become a pressing technical problem for those skilled in the art. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a cabinet to reduce the operation and maintenance costs of converters.

[0004] Another object of this application is to provide a converter including the aforementioned cabinet.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A server rack, comprising:

[0007] The cabinet is provided with a first air inlet and a first air outlet. The first air outlet is located on the bottom surface of the cabinet, and a heat dissipation air duct is formed inside the cabinet from the first air inlet to the first air outlet.

[0008] An air duct is located below the cabinet. The second air inlet of the air duct is connected to the first air outlet, and the second air outlet of the air duct is connected to the outside.

[0009] A cooling fan drives airflow from the cooling duct into the air guide tube.

[0010] Optionally, in the above-mentioned cabinet, the opening area of ​​the first air outlet is greater than or equal to the opening area of ​​the second air inlet;

[0011] The cabinet also includes an air guide component, the third air inlet of which is connected to the first air outlet, and the third air outlet of which is connected to the second air inlet.

[0012] Optionally, in the above-mentioned cabinet, the cabinet is installed inside the wind turbine tower and above the tower platform;

[0013] The air guide component is disposed between the cabinet and the tower platform; or, the tower platform is provided with a first clearance hole, and the air guide component passes through the first clearance hole.

[0014] Optionally, in the aforementioned cabinet, the cabinet is installed inside the wind turbine tower and above the tower platform, the air guide component is installed above the tower platform, and a second clearance hole is provided on the tower platform, through which the air guide duct passes.

[0015] Optionally, in the above-mentioned cabinet, there are one or more cabinets and one or more third air inlets, which are connected to each cabinet in a corresponding manner.

[0016] Optionally, in the aforementioned cabinet, the cabinet is installed inside the wind turbine tower, and the side wall of the wind turbine tower is provided with a heat dissipation window that communicates with the outside, and the second air outlet is connected to the heat dissipation window.

[0017] Optionally, in the aforementioned cabinet, the air duct includes an air inlet section and an air outlet section. The air inlet end of the air inlet section is provided with a second air inlet. The air outlet end of the air inlet section is connected to the air inlet end of the air outlet section. The air outlet end of the air outlet section is connected to the heat dissipation window. The air inlet section is arranged in a vertical direction, and the air outlet section is arranged in a horizontal direction.

[0018] Optionally, in the above-mentioned cabinet, the opening area of ​​the third air inlet is greater than or equal to the opening area of ​​the first air outlet, and the third air inlet is arranged opposite to the first air outlet.

[0019] And / or, the opening area of ​​the third air outlet is less than or equal to the opening area of ​​the second air inlet, and the third air outlet is arranged opposite to the second air inlet.

[0020] Optionally, in the aforementioned cabinet, the cooling fan is disposed within the cooling duct, the air guide tube, or between the first air outlet and the second air inlet.

[0021] Optionally, in the aforementioned cabinet, a heat sink is installed inside the cabinet, and the heat sink is installed on the heat dissipation duct.

[0022] A converter, characterized in that it includes the aforementioned cabinet.

[0023] The cabinet provided in this application includes a cabinet body, an air duct, and a cooling fan. The cabinet body houses various electronic components and has a first air inlet and a first air outlet. The first air inlet connects to the wind turbine tower for air intake, and the first air outlet is located on the bottom surface of the cabinet body, achieving a bottom-outlet cooling solution. This forms a cooling airflow channel from the first air inlet to the first air outlet within the cabinet body. The second air inlet of the air duct connects to the first air outlet, and the second air outlet connects to the outside of the wind turbine tower. The air duct is directly located below the cabinet body, allowing heat to be directly guided and discharged from the cabinet body to the outside of the wind turbine tower without passing through the horizontal circumference of the cabinet body. This prevents heat accumulation inside the wind turbine tower from affecting the normal operation of the electronic components inside the cabinet. The area below the cabinet body is typically not used for maintenance; therefore, the air duct located at the bottom of the cabinet body has minimal impact on the cabinet's maintenance. The cooling fan drives airflow from the cooling airflow channel into the air duct until the heat is discharged to the outside.

[0024] Compared to related technologies, the cabinet provided in this application adopts a vertical layout. By placing the first air outlet and the air duct directly at the bottom of the cabinet, a bottom heat dissipation and exhaust solution is achieved. This reduces the space occupied by the air duct in the cabinet's maintenance space, especially the maintenance space occupied at the rear door in the horizontal direction of the cabinet. This makes the cabinet's later maintenance more convenient, reduces maintenance costs, and improves space utilization. In addition, it also reduces the impact of the location of the maintenance space on the layout of electronic components inside the cabinet, and improves the design efficiency of electronic components inside the cabinet.

[0025] The converter provided in this application includes the aforementioned cabinet, and therefore also possesses the aforementioned structure and beneficial effects. Other structures are described in reference to relevant technologies and will not be elaborated upon here. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 is a schematic diagram of the layout structure of the first type of cabinet in the tower disclosed in the embodiment of this application;

[0028] Figure 2 is a schematic diagram of the layout structure of the first type of cabinet inside the tower disclosed in the embodiment of this application;

[0029] Figure 3 is a structural schematic diagram of the first type of cabinet disclosed in the embodiment of this application;

[0030] Figure 4 is a schematic diagram of the layout structure of the second type of cabinet inside the tower disclosed in the embodiment of this application;

[0031] Figure 5 is a schematic diagram of the layout structure of the third type of cabinet disclosed in the embodiment of this application within the tower;

[0032] Figure 6 is a schematic diagram of the layout structure of the fourth type of cabinet in the tower disclosed in the embodiments of this application;

[0033] Figure 7 is a schematic diagram of the layout structure of the fifth type of cabinet inside the tower disclosed in the embodiments of this application;

[0034] Figure 8 is a schematic diagram of the layout structure of the sixth type of cabinet inside the tower disclosed in the embodiments of this application.

[0035] Among them, 100 is the cabinet, 101 is the first air inlet, 102 is the first air outlet, and 110 is the windproof partition.

[0036] 200 is the air duct, 200a is the second air inlet, 200b is the second air outlet, 210 is the air inlet section, and 220 is the air outlet section;

[0037] 300 is the air guide component, 300a is the third air inlet, and 300b is the third air outlet;

[0038] 400 is a cooling fan;

[0039] 500 is the wind turbine tower, 510 is the tower platform, 511 is the first clearance hole, 512 is the second clearance hole, and 513 is the connecting hole;

[0040] 600 is the heatsink. Detailed Implementation

[0041] The core of this application is to disclose a cabinet to reduce the operation and maintenance costs of converters.

[0042] Another key aspect of this application is the disclosure of a converter that includes the aforementioned cabinet.

[0043] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model as described in the claims. Additionally, the complete contents of the structures represented in the embodiments below are not limited to those necessary for the solution of the utility model as described in the claims. It should be noted that, for ease of description, only the parts relevant to the utility model are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0044] In related technologies, air guides are usually located at the rear of the cabinet in the circumferential direction. Correspondingly, part of the air duct is also located at the rear of the cabinet and is connected to the air guide. This results in a portion of the maintenance space at the rear of the cabinet being occupied. Based on this, this application discloses a cabinet.

[0045] Referring to Figures 1 and 2, the cabinet disclosed in this embodiment is installed inside the wind turbine tower 500 and positioned above the tower platform 510. The tower platform 510 is also installed inside the wind turbine tower 500 and serves to provide an installation platform. Other electrical equipment and cooling pipes can be installed below the tower platform 510. The tower platform 510 can be a support structure or other structures, and this embodiment does not limit its design.

[0046] The cabinet disclosed in this application can be used in tower-based converters or other power equipment, and this application does not limit this.

[0047] Referring to Figures 1 and 3, the cabinet disclosed in this application includes a cabinet body 100, an air duct 200, and a cooling fan 400. The cabinet body 100 is used to house various electronic devices, and the cabinet body 100 is provided with a first air inlet 101 and a first air outlet 102. The first air inlet 101 is connected to the wind turbine tower 500 to allow air to enter, and the first air outlet 102 is located on the bottom surface of the cabinet body 100 to achieve the technical solution of air dissipation from the bottom of the cabinet body 100, thus forming a heat dissipation air duct from the first air inlet 101 to the first air outlet 102 within the cabinet body 100. The second air inlet 200a of the air duct 200 is connected to the first air outlet 102, and the second air outlet 200b of the air duct 200 is connected to the outside of the wind turbine tower 500. The air duct 200 is directly installed below the cabinet 100, allowing heat to be directly guided and discharged from the cabinet 100 to the outside of the wind turbine tower 500 without passing through the horizontal circumference of the cabinet 100. This avoids heat accumulation inside the wind turbine tower 500, which could affect the normal operation of the electronic components inside the cabinet 100. The area below the cabinet 100 is usually not used as maintenance space, so the air duct 200 located at the bottom of the cabinet 100 will not significantly affect the maintenance of the cabinet 100. The air duct 200 can be directly fixed to the bottom of the cabinet 100 by welding, screwing, snap-fitting, etc. The air duct 200 can be fixed to the tower platform 510 or not. The cooling fan 400 is used to drive airflow through the cooling duct and guide it into the air duct 200 until the heat is discharged to the outside.

[0048] Compared to related technologies, the cabinet disclosed in this application adopts a vertical layout. By directly setting the first air outlet 102 and the air duct 200 at the bottom of the cabinet 100, a bottom heat dissipation and exhaust solution is achieved. This reduces the space occupied by the air duct 200 in the cabinet 100's maintenance space, especially the maintenance space occupied at the rear door of the cabinet 100 in the horizontal direction. This makes the cabinet's later maintenance more convenient, reduces maintenance costs, and improves space utilization. In addition, it also reduces the impact of the location of the maintenance space on the layout of electronic components inside the cabinet 100, and improves the design efficiency of electronic components inside the cabinet 100.

[0049] It should be noted that, in some embodiments, in order to ensure that airflow can fully pass through all locations within the cabinet 100, thereby providing sufficient heat dissipation for the electronic components inside the cabinet 100, the first air inlet 101 and the first air outlet 102 typically have large opening areas. For example, the first air inlet 101 can form a mesh-like air intake structure through a ventilation grid, which has a large air intake area and can intercept larger debris to a certain extent, preventing foreign objects from entering the cabinet 100 and affecting the normal operation of the components inside the cabinet 100.

[0050] In order to effectively reduce heat dissipation dead zones and allow airflow to fully pass through multiple locations inside the cabinet 100 for heat dissipation, when there is only one first air outlet 102, the first air outlet 102 has a large opening area, and when there are multiple first air outlets 102, the first air outlets 102 are distributed at multiple locations on the bottom of the cabinet 100. The opening area of ​​the second air inlet 200a is usually less than or equal to the opening area of ​​the first air outlet 102. For the scheme where the opening area of ​​the second air inlet 200a is less than the opening area of ​​the first air outlet 102, in order to guide all the air out of the first air outlet 102 into the second air inlet 200a, the cabinet also includes an air guide component 300. The third air inlet 300a of the air guide component 300 is connected to the first air outlet 102, and the third air outlet 300b of the air guide component 300 is connected to the second air inlet 200a of the air guide duct 200. The opening area of ​​the third air inlet 300a is greater than the opening area of ​​the third air outlet 300b, so that all the airflow flowing out of the first air outlet 102 is guided into the second air inlet 200a through the air guide component 300, and then discharged to the outside through the air guide duct 200.

[0051] The embodiments of this application do not limit the specific shape and size of the first air inlet 101, the first air outlet 102, the second air inlet 200a, the second air outlet 200b, the third air inlet 300a, and the third air outlet 300b. The third air inlet 300a and the third air outlet 300b can be adapted to the shape of the first air outlet 102 and the second air inlet 200a, respectively. In a further embodiment, the opening area of ​​the third air inlet 300a is greater than or equal to the opening area of ​​the first air outlet 102, and the third air inlet 300a is arranged opposite to the first air outlet 102 to ensure that all the air coming out of the first air outlet 102 can flow into the air guide component 300 to avoid air leakage; the opening area of ​​the third air outlet 300b is less than or equal to the opening area of ​​the second air inlet 200a, and the third air outlet 300b is arranged opposite to the second air inlet 200a to ensure that all the airflow in the air guide component 300 can flow into the air guide duct 200, and finally be discharged to the outside of the wind turbine tower 500 through the air guide duct 200.

[0052] In addition, a sealing element can be installed at the connection point between the air guide component 300 and the cabinet 100 and the air guide tube 200 to further reduce air leakage.

[0053] The shape of the air guide component 300 is not limited in this application embodiment. For example, Figure 3 shows an air guide component 300 with a rectangular cube shape. The air guide component 300 can also be disc-shaped or other shapes. The air guide component 300 is connected and fixed to at least one of the cabinet 100 and the tower platform 510 by means of welding, screwing, snap-fitting, etc.

[0054] Referring to Figures 5 and 6, the air guide component 300 is fixedly connected to at least one of the cabinet 100 and the tower platform 510; referring to Figures 6, 7, and 8, the air guide duct 200 is fixedly connected to at least one of the cabinet 100, the air guide component 300, and the tower platform 510, providing a flexible connection method. Specifically, referring to Figure 8, for the technical solution of directly fixing the air guide duct 200 to the tower platform 510, a connecting hole 513 can be directly opened on the tower platform 510, connecting the first air outlet 102 and the second air inlet 200a.

[0055] In some embodiments, referring to FIG6, the air guide component 300 is disposed between the cabinet 100 and the tower platform 510, that is, the air guide component 300 is disposed above the tower platform 510, and the force of the air guide component 300 can be applied directly to the tower platform 510 without passing through the cabinet 100, thereby optimizing the stress scheme and improving the reliability of the structure.

[0056] In other embodiments, referring to Figure 5, a first clearance hole 511 is provided on the tower platform 510, and the air guide component 300 is arranged through the first clearance hole 511. The air guide component 300 does not affect the arrangement and installation of the cabinet 100 on the tower platform 510, and the tower platform 510 does not affect the connection between the air guide component 300 and the cabinet 100. The air guide component 300 can be directly fixed to the bottom of the cabinet 100 by welding, screwing, snap-fitting, etc. Furthermore, in this embodiment, the air guide component 300 can also be fixed to the tower platform 510 by a connector to improve the stability and reliability of the structure. For example, the air guide component 300 can be fixed to the tower platform 510 at multiple points by providing connecting ears on it.

[0057] To avoid the tower platform 510 affecting the arrangement of the air guide duct 200, in some embodiments, referring to Figure 6, a second clearance hole 512 is provided on the tower platform 510, through which the air guide duct 200 is arranged, resulting in a simple structure. In this embodiment, the air guide component 300 can be positioned above the tower platform 510 or arranged through the first clearance hole 511.

[0058] There can be one or more cabinets 100. The number of third air inlets 300a is adapted to the number of cabinets 100. That is, there are one or more third air inlets 300a, and they are connected to each cabinet 100 in a one-to-one correspondence.

[0059] Specifically, in some embodiments, there are at least two cabinets 100, and each cabinet 100 is connected to a corresponding air duct 200. Different cabinets 100 can correspond to different numbers of air ducts 200 for exhaust and heat dissipation, which is flexible in design.

[0060] When the cooling fan 400 provides sufficient cooling for a single cabinet 100, multiple cabinets 100 can be arranged in parallel for cooling to reduce costs. Specifically, referring to Figure 4, there are at least two cabinets 100, and the first air outlet 102 of each cabinet 100 is connected to the aforementioned air guide component 300. That is, multiple cabinets 100 can share the same air duct 200 and air guide component 300 for exhaust cooling, thereby reducing the space occupied by the equipment and lowering costs. In this embodiment, the air guide component 300 can be provided with multiple third air inlets 300a, each of which is connected to a corresponding first air outlet 102 of a different cabinet 100, thereby achieving compatibility.

[0061] To facilitate the exhaust of air from the wind turbine tower 500 through the air duct 200, a heat dissipation window communicating with the outside is provided on the side wall of the wind turbine tower 500. The second air outlet 200b is connected to the heat dissipation window and can directly guide the airflow from the air duct 200 to the heat dissipation window and discharge it to the outside. It should be noted that the heat dissipation window can be set on the side wall of the wind turbine tower 500 in any direction according to the actual situation, as long as it does not affect the layout of other electronic equipment or structures inside the wind turbine tower 500.

[0062] Furthermore, rain shields and dust covers can be installed outside the heat dissipation window. The opening of the rain shield is arranged facing the ground to prevent rainwater from sweeping into the heat dissipation window and the air duct 200. The dust cover can prevent debris from entering the air duct 200 when the cooling fan 400 is stopped.

[0063] Based on the actual layout of various electrical equipment and structures within the wind turbine tower 500, the shape of the air guide duct 200 can be specifically designed to avoid affecting the operation and maintenance and heat dissipation of other electrical equipment. For example, in some embodiments disclosed in this application, referring to Figure 5, the air guide duct 200 includes an inlet section 210 and an outlet section 220. The inlet end of the inlet section 210 is provided with a second inlet 200a, and the outlet end of the inlet section 210 is connected to the inlet end of the outlet section 220. The outlet end of the outlet section 220 is connected to a heat dissipation window. The inlet section 210 is arranged vertically, and the outlet section 220 is arranged horizontally. In this embodiment, after the airflow exits from the first outlet 102, it can flow to the outside of the wind turbine tower 500 after one airflow turn, effectively shortening the flow path of the airflow to the outside. Simultaneously, it reduces the number of right-angle turns on the air guide duct 200, thereby reducing the heat dissipation resistance of the airflow within the air guide duct 200 and improving heat dissipation efficiency.

[0064] The aforementioned air inlet section 210 and air outlet section 220 can be an integrated structure or a separate structure. When it is an integrated structure, it can be manufactured by bending the pipe, or the two pipe sections can be connected into one piece by welding with elbows. When it is a separate structure, it can be fixed by bolts or other methods. In addition, the air duct 200 can be a rigid structure or a flexible structure, and this application embodiment does not limit this.

[0065] Referring to Figures 1 and 2, a front door and a rear door are respectively provided on opposite sides of the cabinet 100, and the first air inlet 101 can be located on the front door and / or the rear door. In some embodiments, the positions of the front door and the rear door on the cabinet 100 are defined as the front and rear of the cabinet 100, respectively, and the sides are two surfaces connected between the front and rear of the cabinet 100 and arranged opposite to each other. The first air inlet 101 can also be located on the side of the cabinet 100. In addition, the first air inlet 101 can also be located on the top surface of the cabinet 100. Compared with the sides and the top surface, the front door and the rear door of the cabinet 100 usually have a larger area to accommodate the first air inlet 101, thus ensuring sufficient air intake to meet the heat dissipation requirements.

[0066] Referring to Figures 5 and 6, the cooling fan 400 can be specifically installed inside the cooling duct, the air guide duct 200, or between the first air outlet 102 and the second air inlet 200a. Installing it inside the cooling duct or air guide duct 200 reduces the space occupied by the fan within and outside the wind turbine tower 500. For example, the cooling fan 400 can be installed at the first air inlet 101 or the first air outlet 102; it can also be installed at the second air inlet 200a, the second air outlet 200b, or other locations inside the air guide duct 200. Installing the cooling fan 400 at the first air inlet 101, the first air outlet 102, the second air inlet 200a, or the second air outlet 200b facilitates disassembly and maintenance. Alternatively, the cooling fan 400 can also be installed inside the air guide component 300. Multiple cooling fans 400 can be installed, each located in one of the aforementioned positions. The controller for the cooling fan 400 can be placed in a location convenient for maintenance personnel.

[0067] Furthermore, a dustproof component can be installed at the first air inlet 101 to prevent external dust and other impurities from entering the cabinet 100 and affecting the electronic components inside the cabinet 100.

[0068] The first air inlet 101 can be arranged as close as possible to the top of the cabinet 100 to form a top-to-bottom heat dissipation duct. For example, referring to Figure 3, it shows a technical solution in which the first air inlet 101 is arranged at the front door, and the heat dissipation duct draws in air from the front door of the cabinet 100, flows vertically downward inside the cabinet 100, and is finally discharged by the air guide duct 200. The structure is simple.

[0069] In some embodiments, referring to FIG5, a windbreak partition 110 is provided inside the cabinet 100. The windbreak partition 110 can divide the interior of the cabinet 100 into a bent heat dissipation channel to extend the flow path of airflow inside the cabinet 100, ensuring that the airflow can fully flow through all parts of the cabinet 100 for heat exchange and improve the heat dissipation effect.

[0070] In some embodiments disclosed in this application, referring to Figure 5, a radiator 600 is also provided inside the cabinet 100, and the radiator 600 is disposed on the heat dissipation duct. The types of radiators 600 include, but are not limited to, liquid-cooled radiators and semiconductor radiators. When airflow passes through the radiator 600, it can reduce the temperature, thereby improving heat dissipation efficiency and enhancing the heat dissipation effect. For example, the radiator 600 can be disposed near the first air inlet 101 to ensure that low-temperature airflow can flow through various locations within the cabinet 100.

[0071] The cabinet disclosed in this application is highly flexible and can be designed with different connection schemes according to different usage scenarios and application requirements. It can also achieve compatible heat dissipation of multiple cabinets 100 according to the actual heat dissipation capacity of the equipment, thereby reducing the overall cost.

[0072] The converter disclosed in this application includes the aforementioned cabinet, and therefore also possesses the aforementioned structure and beneficial effects. Other structures are described in reference to relevant technologies and will not be repeated here.

[0073] In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more. In the description of this application, "arranged along the vertical or horizontal direction" means completely parallel or almost completely parallel to the vertical or horizontal direction; for example, parallelism is considered to be within a 10° range of complete parallelism.

[0074] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Specific technical means in some embodiments may be incorporated, in whole or in part, into another embodiment unless explicitly excluded by another embodiment. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A server rack, characterized in that, include: The cabinet (100) is provided with a first air inlet (101) and a first air outlet (102). The first air outlet (102) is located on the bottom surface of the cabinet (100). A heat dissipation duct is formed inside the cabinet (100) from the first air inlet (101) to the first air outlet (102). The air guide tube (200) is located below the cabinet (100). The second air inlet (200a) of the air guide tube (200) is connected to the first air outlet (102), and the second air outlet (200b) of the air guide tube (200) is connected to the outside. The cooling fan (400) drives the airflow from the heat dissipation duct to the air guide tube (200).

2. The cabinet as described in claim 1, characterized in that, The opening area of ​​the first air outlet (102) is greater than or equal to the opening area of ​​the second air inlet (200a); the cabinet also includes an air guide component (300), the third air inlet (300a) of the air guide component (300) is connected to the first air outlet (102), and the third air outlet (300b) of the air guide component (300) is connected to the second air inlet (200a).

3. The cabinet as described in claim 2, characterized in that, The cabinet is located inside the wind turbine tower (500) and above the tower platform (510); the air guide component (300) is located between the cabinet (100) and the tower platform (510); or, the tower platform (510) is provided with a first clearance hole (511), and the air guide component (300) passes through the first clearance hole (511).

4. The cabinet as described in claim 2, characterized in that, The cabinet is located inside the wind turbine tower (500) and above the tower platform (510). The air guide component (300) is located above the tower platform (510), and the tower platform (510) is provided with a second clearance hole (512). The air guide duct (200) passes through the second clearance hole (512).

5. The cabinet as described in claim 2, characterized in that, There are one or more cabinets (100), and there are one or more third air inlets (300a), which are connected to each cabinet (100) in a one-to-one correspondence.

6. The cabinet as described in claim 2, characterized in that, The cabinet is installed inside the wind turbine tower (500), and the side wall of the wind turbine tower (500) is provided with a heat dissipation window that communicates with the outside. The second air outlet (200b) is connected to the heat dissipation window.

7. The cabinet as described in claim 6, characterized in that, The air duct (200) includes an air inlet section (210) and an air outlet section (220). The air inlet end of the air inlet section (210) is provided with a second air inlet (200a). The air outlet end of the air inlet section (210) is connected to the air inlet end of the air outlet section (220). The air outlet end of the air outlet section (220) is connected to the heat dissipation window. The air inlet section (210) is arranged in a vertical direction, and the air outlet section (220) is arranged in a horizontal direction.

8. The cabinet as described in claim 2, characterized in that, The opening area of ​​the third air inlet (300a) is greater than or equal to the opening area of ​​the first air outlet (102), and the third air inlet (300a) is arranged opposite to the first air outlet (102); and / or, the opening area of ​​the third air outlet (300b) is less than or equal to the opening area of ​​the second air inlet (200a), and the third air outlet (300b) is arranged opposite to the second air inlet (200a).

9. The cabinet as described in any one of claims 1-8, characterized in that, The cooling fan (400) is disposed in the cooling duct, the air guide tube (200), or between the first air outlet (102) and the second air inlet (200a).

10. The cabinet as described in any one of claims 1-8, characterized in that, A radiator (600) is installed inside the cabinet (100), and the radiator (600) is installed on the heat dissipation duct.

11. A converter, characterized in that, Includes the cabinet as described in any one of claims 1-10.

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