A frequency converter cabinet that meets the requirements for heat dissipation, waterproofing, and dustproofing.

Abstract

This utility model relates to the field of electrical cabinet technology, specifically to a frequency converter cabinet that meets the requirements for heat dissipation and waterproof / dustproof performance. While providing sealed protection, it also allows air circulation to meet heat dissipation requirements. The cabinet includes a unit containing a frequency converter core and electronic components. A partition separates the cabinet into a front and rear heat dissipation area. The frequency converter core and electronic components are both located in the front heat dissipation area. An IGBT module in the frequency converter core is connected to a heat sink, which passes through the partition and is located in the rear heat dissipation area. The front heat dissipation area has a front air inlet at the bottom and a front air outlet at the top, with a filter at the front air inlet and a front exhaust fan at the front air outlet. The rear heat dissipation area has a rear air inlet at the bottom and a rear air outlet at the top, with a rear exhaust fan at the rear air outlet.

Description

Technical Field

[0001] This utility model relates to the field of electrical cabinet technology, specifically to a frequency converter cabinet that meets the requirements for heat dissipation and waterproof / dustproof performance. Background Technology

[0002] Frequency converters are an important component of motor drives. As the most commonly used power-providing machines, motors are used in a variety of complex and varied situations. For outdoor or harsh working conditions, frequency converters need to have certain protection functions to ensure the stable operation of electrical appliances. Therefore, frequency converters with IP54 protection ratings have been developed.

[0003] As a high-power electrical component, the frequency converter generates more heat than ordinary components. Moreover, its operating electrical system is more complex and has higher temperature requirements. Therefore, its heat dissipation requirements are also higher. Simply sealing it to meet IP54 protection will lead to overheating of the entire system. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a frequency converter cabinet that meets the requirements of heat dissipation and waterproof and dustproof standards. While meeting the requirements of sealing protection, it can also allow air circulation to meet the requirements of heat dissipation.

[0005] The technical solution is as follows: A frequency converter cabinet that meets the requirements for heat dissipation and waterproof / dustproof performance includes a cabinet, in which a frequency converter core and electronic components are installed. The cabinet is characterized by having a partition separating a front heat dissipation area and a rear heat dissipation area. The frequency converter core and electronic components are both installed in the front heat dissipation area. An IGBT module in the frequency converter core is connected to a heat sink. The heat sink passes through the partition and is located in the rear heat dissipation area. The front heat dissipation area has a front air inlet at the bottom and a front air outlet at the top, with a filter cotton at the front air inlet and a front exhaust fan at the front air outlet. The rear heat dissipation area has a rear air inlet at the bottom and a rear air outlet at the top, with a rear exhaust fan at the rear air outlet.

[0006] A further feature is that the front air inlet includes an air inlet frame, an air inlet baffle is provided inside the air inlet frame, the lower outer part of the air inlet frame is an air inlet area, the upper inner part is an air outlet area, and the filter cotton is installed in the air outlet area. The front air outlet includes an air outlet frame, an air outlet baffle is provided inside the air outlet frame, the lower outer part of the air outlet frame is the air outlet area, the upper inner part is the air inlet area, and the front fan is installed in the air inlet area.

[0007] By adopting this utility model, two heat dissipation zones are formed inside the cabinet. For the IGBT module with high heat generation in the core, the heat is directly conducted to the rear heat dissipation zone using a heat sink for separate heat dissipation. The remaining electronic components are dissipated by the cooling air entering the front heat dissipation zone. In addition, filter cotton is added to filter the cooling air and prevent dust particles from entering the cabinet. This satisfies the sealing and protection requirements while achieving air circulation to meet the heat dissipation requirements. Furthermore, baffles are installed in both the front air inlet and the front air outlet, and the inlet and outlet are distributed vertically to effectively prevent water or solid debris from entering, ensuring the protective effect. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model. Detailed Implementation

[0009] See Figure 1 and Figure 2 As shown, a frequency converter cabinet that meets the requirements for heat dissipation and waterproof / dustproof performance includes a cabinet 1. The frequency converter core 2 and electronic components are installed inside the cabinet 1. A partition 3 is provided inside the cabinet 1 to separate a front heat dissipation area 4 and a rear heat dissipation area 5. The frequency converter core 2 and electronic components are both installed in the front heat dissipation area 4. The IGBT module 6 in the frequency converter core 2 serves as the main heat source and is connected to a heat sink 7. The heat sink 7 has a finned structure and passes through the partition 3 and is located in the rear heat dissipation area 5. The heat generated by the IGBT module 6 is transferred to the rear heat dissipation area 5 through the heat sink 7.

[0010] The front heat dissipation area 4 has a front air inlet at the bottom and a front air outlet at the top. The front air inlet includes an air inlet frame 8, inside which an air inlet baffle 9 is installed. The lower outer part of the air inlet frame 8 is the air inlet area, and the upper inner part is the air outlet area, with filter cotton 10 installed in the air outlet area. The front air outlet includes an air outlet frame 11, inside which an air outlet baffle 12 is installed. The lower outer part of the air outlet frame 11 is the air outlet area, and the upper inner part is the air inlet area, with a front exhaust fan 13 installed in the air inlet area. The air inlet and outlet areas are staggered vertically, and with the baffle blocking the airflow, water or solid debris from the outside cannot enter the cabinet 1 from the front air inlet and the front air outlet.

[0011] The rear heat dissipation area 5 has a rear air inlet 14 at the bottom and a rear air outlet 15 at the top. A rear exhaust fan 16 is installed at the rear air outlet 15. Since there are no electronic components here, there is no need to install the same protective measures as the front heat dissipation area.

[0012] Cooling air enters the cabinet 1 through both the front and rear air inlets. The cooling air entering through the front air inlet carries away the heat generated by the electronic components inside the cabinet and exits through the front air outlet. The heat generated by the IGBT module 6 is carried by the heat sink 7 to the rear heat dissipation area 5, where it is carried away by the cooling air entering through the rear air inlet. The cabinet is cooled using two sets of heat dissipation systems.

[0013] This application focuses on air circulation to remove heat, so it is necessary to take precautions for the internal circulation, mainly against water and solid particles. The air intake is filtered in two layers. An air intake grille 18 is opened on the door panel 17 to filter larger objects first, and then the second layer is filtered by the filter cotton 10 to filter dust particles.

Claims

1. A frequency converter cabinet that meets the requirements for heat dissipation and waterproof / dustproof performance, comprising a cabinet, wherein a frequency converter core and electronic components are installed inside the cabinet, characterized in that, The cabinet is equipped with a partition that separates a front heat dissipation area and a rear heat dissipation area. The inverter core and the electronic components are all installed in the front heat dissipation area. The IGBT module in the inverter core is connected to a heat sink. The heat sink passes through the partition and is located in the rear heat dissipation area. The front heat dissipation area has a front air inlet at the bottom and a front air outlet at the top. A filter is installed at the front air inlet, and a front exhaust fan is installed at the front air outlet. The rear heat dissipation area has a rear air inlet at the bottom and a rear air outlet at the top. A rear exhaust fan is installed at the rear air outlet. The front air inlet includes an air inlet frame with an air inlet baffle inside. The lower outer part of the air inlet frame is the air inlet area, and the upper inner part is the air outlet area, with the filter installed in the air outlet area. The front air outlet includes an air outlet frame with an air outlet baffle inside. The lower outer part of the air outlet frame is the air outlet area, and the upper inner part is the air inlet area, with the front exhaust fan installed in the air inlet area.

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