Frequency conversion cabinet with independent air duct

Abstract

The utility model provides a frequency conversion cabinet with an independent air duct, which relates to the technical field of control cabinets, comprises a box body, and is characterized in that the interior of the box body is divided into three layers, the lower layer of the interior of the box body is an air inlet area, the middle layer of the interior of the box body is a heat dissipation area, the upper layer of the interior of the box body is an air outlet area, and the air inlet area, the heat dissipation area and the air outlet area are communicated. Through the unique air duct design and a series of detail optimization, the heat dissipation efficiency of the power module in the frequency conversion cabinet is effectively improved, the use effect of electrical parts is protected, the service life is prolonged, and the maintenance and installation of the power module are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of control cabinet technology, specifically to a frequency converter cabinet with an independent air duct. Background Technology

[0002] In traditional drive control cabinet layouts, power modules are typically housed inside the cabinet, with their air ducts connected to the interior. Dust and heat from these ducts easily spread throughout the cabinet, resulting in a buildup of dust and heat. The lack of independent airflow between the power modules and the outside environment exposes electrical components and copper busbars to dust and high temperatures, impacting their performance and lifespan. Cool air entering the cabinet doesn't directly cool the high-heat power modules; instead, it carries some heat and dust, circulating within the cabinet. Air entering from the bottom of the power modules contains some heat from inside the cabinet, and the air exiting from the top isn't completely expelled, leaving some dust and heat trapped inside. This repeated circulation increases dust and temperature over time, further affecting the performance and lifespan of electrical components and significantly impacting the power module's heat dissipation efficiency. With increasing market demands for higher power output and a larger number of power modules within limited space, a superior structural design is needed to improve dust resistance and heat dissipation efficiency within a confined space and while minimizing costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a frequency converter cabinet with an independent air duct. The power module is located inside the electrical enclosure, and the air duct of the power module is connected to the interior of the electrical enclosure. This causes dust and heat to easily spread throughout the entire electrical enclosure, affecting the performance and lifespan of the electrical components, and also reducing the heat dissipation efficiency of the power module.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A frequency converter cabinet with independent air ducts includes a cabinet, characterized in that: the interior of the cabinet is divided into three layers, the lower interior layer of the cabinet is an air inlet area, the middle interior layer of the cabinet is a heat dissipation area, and the upper interior layer of the cabinet is an air outlet area, wherein the air inlet area, the heat dissipation area and the air outlet area are interconnected.

[0006] Preferably, a dustproof mesh assembly is installed at the air inlet of the air inlet area.

[0007] Preferably, a power module is provided in the heat dissipation area, and lower guide rails are provided on both sides of the bottom of the power module. The bottom of the power module is slidably disposed inside the housing via the lower guide rails, and the bottom of the power module is provided with a rigid material with a flexible core.

[0008] Preferably, the top of the power module is provided with a sealing ring, and the top two sides of the power module are provided with upper guide rails, and the top of the power module is slidably disposed inside the housing via the upper guide rails.

[0009] Preferably, the air inlet area and the heat dissipation area are separated by a lower partition located inside the housing, and the heat dissipation area and the air outlet area are separated by an upper partition located inside the housing. The middle sections of the lower and upper partitions are open.

[0010] Preferably, the power module includes a capacitor and a heat sink.

[0011] Preferably, a backflow prevention floor drain is provided at one corner of the bottom of the box.

[0012] Preferably, the housing has an exhaust duct located on the outer side of the air inlet area, heat dissipation area, and air outlet area. The upper end of the exhaust duct is connected to the air outlet area, and an exhaust fan is installed on the exhaust port on the bottom side of the exhaust duct.

[0013] This utility model provides a frequency converter cabinet with an independent air duct. It has the following beneficial effects:

[0014] Independent air duct design: The three-layer partition inside the enclosure (air inlet zone, heat dissipation zone, and air outlet zone) forms an independent air duct from the outside, which completely isolates the heat dissipation zone of the power module from the electrical zone, avoiding the impact of the heat generated by the power module on the electrical zone, thereby protecting the performance of the electrical components and extending their service life.

[0015] High-efficiency heat dissipation: The heat dissipation area of ​​the power module directly forms an independent airflow channel with the outside cold air. This design greatly improves the heat dissipation efficiency of the power module. After passing through the dust filter assembly, the cold air first dissipates heat from the capacitors of the power module, then from the heat sink, and finally the hot air is exhausted from the enclosure by the exhaust fan, forming a highly efficient heat dissipation cycle.

[0016] Dustproof and sealing: A dustproof mesh assembly is installed at the air inlet of the air intake area to effectively isolate dust; at the same time, the rigid material with flexible parts at the bottom of the power module and the sealing ring at the top increase the sealing of the air inlet at the bottom and the air outlet at the top of the power module, further preventing dust from entering and heat from leaking.

[0017] Easy to maintain and install: The power module can be slidably installed inside the enclosure via the lower and upper guide rails. This design not only facilitates the installation and disassembly of the power module, but also makes subsequent maintenance and replacement easier.

[0018] Rainproof design: A backflow prevention drain is installed at one corner of the bottom of the cabinet to ensure that rainwater can be drained in time if it enters the cabinet, thus avoiding damage to the electrical components inside the cabinet.

[0019] In summary, this utility model, through its unique air duct design and a series of detailed optimizations, effectively improves the heat dissipation efficiency of the power module, protects the performance of electrical components, extends service life, and facilitates the maintenance and installation of the power module. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a partial side view of the structure of this utility model;

[0022] Figure 3 This utility model Figure 1 A magnified structural diagram of part A;

[0023] Figure 4 This utility model Figure 1 A schematic diagram of the enlarged structure of part B;

[0024] Figure 5 This utility model Figure 2 A magnified structural diagram of section C;

[0025] Figure 6 This utility model Figure 2 A schematic diagram of the enlarged structure of part D;

[0026] In the diagram: 1. Dustproof mesh assembly; 2. Air inlet area; 3. Lower partition; 4. Flexible material; 5. Lower guide rail; 6. Power module; 7. Capacitor; 8. Heat sink; 9. Sealing ring; 10. Upper guide rail; 11. Upper partition; 12. Air outlet area; 13. Exhaust fan; 14. Anti-backflow floor drain; 15. Heat dissipation area; 16. Exhaust duct; 100. Cabinet. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figure 1 and Figure 2As shown, a variable frequency drive (VFD) cabinet with independent air ducts, used for VFD control of dump trucks, includes a housing 100. The interior of the housing 100 is divided into three layers: the lower layer is the air inlet zone 2, the middle layer is the heat dissipation zone 15, and the upper layer is the air outlet zone 12. The air inlet zone 2, heat dissipation zone 15, and air outlet zone 12 are interconnected. An independent air duct is formed between the interior of the housing 100 and the outside environment. The power module 6 is located within the heat dissipation zone 15 and within the independent air duct inside the housing 100.

[0029] like Figure 1 and Figure 3 As shown, a dustproof mesh assembly 1 is installed at the air inlet of air inlet zone 2.

[0030] like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, a power module 6 is installed within the heat dissipation area 15. Lower guide rails 5 are provided on both sides of the bottom of the power module 6, allowing it to slide within the housing 100. A rigid yet flexible material 4 is provided on the bottom of the power module 6 to absorb gaps between the power module 6 and the lower partition 3, increasing the sealing of the lower air inlet of the power module 6. A sealing ring 9 is provided on the top of the power module 6 to absorb errors between the lower partition 3 and the upper partition 11, while also increasing the sealing of the upper air outlet of the power module 6. To ensure the power module 6 is aligned with the lower air inlet and upper air outlet, upper guide rails 10 are provided on both sides of the top of the power module 6, allowing it to slide within the housing 100. The lower guide rails 5 and upper guide rails 10 serve as guides and limiters, while also facilitating production and maintenance.

[0031] like Figure 1 As shown, the air inlet area 2 and the heat dissipation area 15 are separated by a lower partition 3 located inside the housing 100, and the heat dissipation area 15 and the air outlet area 12 are separated by an upper partition 11 located inside the housing 100. The middle part of the lower partition 3 and the upper partition 11 is transparent.

[0032] like Figure 1 and Figure 4 As shown, the power module 6 includes a capacitor 7 and a heat sink 8. A backflow prevention drain 14 is installed at one corner of the bottom of the enclosure 100. If rainwater enters the enclosure 100, it will be drained through the backflow prevention drain 14 at the bottom.

[0033] like Figure 1 As shown, an exhaust duct 16 is isolated inside the housing 100 and located on the outside of the air inlet area 2, the heat dissipation area 15 and the air outlet area 12. The upper end of the exhaust duct 16 is connected to the air outlet area 12, and an exhaust fan 13 is installed on the exhaust port on the bottom side of the exhaust duct 16.

[0034] In this embodiment, under the force of the exhaust fan 13, cold air and dust pass through the dust filter assembly 1, isolating the dust outside. The cold air first passes through the air inlet area 2, then through the heat dissipation area 15 of the power module 6, first dissipating heat from the capacitor 7 of the power module 6, and then from the heat sink 8 of the power module 6. The hot air passes through the air outlet area 12, and then the dust and hot air are discharged from the housing 100 through the exhaust channel 16 by the exhaust fan 13. Some fine dust will leak through the dust filter. In this cycle, cold air enters from the lower front and hot air is discharged from the lower rear.

[0035] The present invention provides a solution in which the power module 6 forms an independent air duct between the inside of the housing 100 and the outside. The heat dissipation area 15 of the power module 6 is isolated from the electrical area, so the heat from the power module 6 will not affect the electrical area. The heat is directly discharged outside the housing 100 through the air duct. This protects the performance and lifespan of the electrical components. The heat dissipation area 15 of the power module 6 forms an independent air duct with the outside cold air, which greatly improves the heat dissipation efficiency of the power module 6.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A frequency converter cabinet with an independent air duct, comprising a housing (100), characterized in that: The interior of the housing (100) is divided into three layers: the lower layer of the housing (100) is the air inlet area (2), the middle layer of the housing (100) is the heat dissipation area (15), and the upper layer of the housing (100) is the air outlet area (12). The air inlet area (2), the heat dissipation area (15) and the air outlet area (12) are connected.

2. The frequency converter cabinet with an independent air duct according to claim 1, characterized in that: A dustproof mesh assembly (1) is installed at the air inlet of the air inlet area (2).

3. A frequency converter cabinet with an independent air duct according to claim 1, characterized in that: A power module (6) is provided in the heat dissipation area (15). The power module (6) has lower guide rails (5) on both sides of its bottom. The bottom of the power module (6) is slidably disposed inside the housing (100) via the lower guide rails (5). The bottom of the power module (6) is provided with a rigid material with a flexible core (4).

4. A frequency converter cabinet with an independent air duct according to claim 3, characterized in that: The top of the power module (6) is provided with a sealing ring (9), and the top sides of the power module (6) are provided with upper guide rails (10). The top of the power module (6) is slidably disposed inside the housing (100) via the upper guide rails (10).

5. A frequency converter cabinet with an independent air duct according to claim 3, characterized in that: The air inlet area (2) and the heat dissipation area (15) are separated by a lower partition (3) located inside the housing (100), and the heat dissipation area (15) and the air outlet area (12) are separated by an upper partition (11) located inside the housing (100). The middle part of the lower partition (3) and the upper partition (11) is transparent.

6. A frequency converter cabinet with an independent air duct according to claim 3, characterized in that: The power module (6) includes a capacitor (7) and a heat sink (8).

7. A frequency converter cabinet with an independent air duct according to claim 1, characterized in that: A backflow prevention floor drain (14) is provided at one corner of the bottom of the box (100).

8. A frequency converter cabinet with an independent air duct according to claim 1, characterized in that: There is an exhaust duct (16) inside the housing (100) and on the outer side of the air inlet area (2), heat dissipation area (15) and air outlet area (12). The upper end of the exhaust duct (16) is connected to the air outlet area (12), and an exhaust fan (13) is installed on the exhaust port on the bottom side of the exhaust duct (16).

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