Rittal cabinets – heat dissipation and dust protection for electrical cabinets

Create Date: 2024-8-30 12:03:23|Source: Rittal/Rittal

1. Built-in air conditioner for heat dissipation

The cabinet is equipped with a refrigeration system, the evaporator and power devices are installed inside the cabinet in a closed manner, and the condenser and compressor are placed in the external circulation air duct or outside the cabinet. Since the power unit is sealed in the cabinet, as long as the appropriate sealing strip is used, it can completely isolate the outside dust ingress, so the dust protection level of the power unit can reach IP6X. This form of heat dissipation scheme can keep the cabinet at the best working temperature, but the structure of the air conditioner is complex, and the cost and use of energy consumption are large.

2. Heat exchanger heat dissipation

The cabinet with heat exchanger is completely isolated from the outside of the cabinet by sealing strips around the door panel, and the air in the cabinet is circulated internally, and the heat exchange is carried out between the heat exchanger and the outside air, which avoids dust from entering the cabinet and can achieve IP6X protection level. However, because the air in the cabinet and the air outside the cabinet can conduct the heat of the power unit to the outside of the cabinet for a second time of heat exchange, there is always a temperature difference between the ambient temperature of the cabinet and the outside of the cabinet, resulting in a higher ambient temperature of the electronic devices in the cabinet, so the failure rate of the electronic equipment is also greatly increased.

3. Liquid cooling and heat dissipation

Liquid cooling heat dissipation is mainly the use of liquid cold plate, centrifugal pump drives liquid flow through the liquid cold plate to achieve heat dissipation of power devices, compared with the traditional air conditioning and refrigeration system to save energy consumption, but the safety of this method is low, so the design and installation requirements are very strict. The dustproof method of this heat dissipation method is similar to that of air conditioner heat dissipation, and the cabinet is directly sealed to isolate the inside and outside, which can achieve IP6X protection level.

4. Forced air cooling and heat dissipation

Fan forced air cooling is suitable for high-power electrical equipment, easy to install and maintain, and low cost compared with other heat dissipation methods, so it is widely used in electrical cabinets. At the same time, because the forced air cooling adopts the mode of direct ventilation inside and outside the cabinet, the dust from the outside will inevitably enter the cabinet, so the position of the fan in the cabinet, the position of the air inlet and the air outlet, the layout of the power device, the installation direction of the board, and the smoothness of the air duct all affect the dustproof effect.

Among the above heat dissipation methods, only the cabinet with forced air cooling is more affected by dust and needs to be considered.

Rittal cabinets – heat dissipation and dust protection for electrical cabinets

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