Analysis of humidity control and dehumidification technology in electrical cabinets

Keeping electrical cabinets dry is crucial to equipment safety, extending life, and reducing maintenance costs. When designing, installing and maintaining electrical cabinets, attention should be paid to humidity control and dehumidification measures should be taken to ensure a dry environment. This improves equipment performance, reliability, reduces maintenance costs and reduces production downtime. This article will discuss dehumidification methods such as exhaust fans, dehumidifiers and compressors, analyzing their principles, applications, advantages and disadvantages.

Exhaust fan

Exhaust fans reduce indoor humidity by increasing air flow, but the dehumidification effect is weak. They are suitable for simple humidity control and air circulation, especially in ventilated places. Traditional exhaust devices have single functions and low efficiency, and can no longer meet the needs of modern electrical cabinets.

Electronic dehumidifier:

Dehumidifiers are devices specifically designed to remove moisture, and common types include electronic condensing dehumidifiers. Suitable for 120W electrical cabinets, it uses condensation technology to condense water vapor in the air into liquid water and then discharge it to reduce air humidity. The electronic condensing dehumidifier condenses moisture on the condenser through the refrigeration system, and then discharges the condensed water. It has high dehumidification efficiency and is suitable for environments with high humidity requirements, such as homes, offices, laboratories, etc.

The DH series Peltier cooler dehumidifier produced by Bluejay company uses semiconductor refrigeration and dehumidification technology. It sucks humid air through a fan, cools it with a semiconductor refrigerator, condenses the water vapor into water, and then discharges it out of the cabinet through pipes to achieve a good dehumidification effect. It reduces relative humidity and absolute humidity with little temperature increase, effectively preventing accidents and equipment aging. The installation volume is ultra-small, efficient and energy-saving, without the need for heater and fan wiring. Equipped with a data acquisition module for remote monitoring, it is a reliable alternative to thermostats and heater/fan combinations.

The advantages of the DH series Peltier cooler dehumidifier is that its Buit-in heater can function in harsh environments, allowing it to operate within the optimal operating temperature range of 30-60 degrees Celsius, even at lower temperatures such as below At 5 degrees Celsius, you can also use the heater to raise the ambient temperature to 5-10 degrees Celsius before dehumidifying. It has strong applicability and high efficiency. The advantages of electronic dehumidifiers include low energy consumption, high sustainability, and low cost.

Compressor

Compressor dehumidification technology is suitable for factories and large sites with a power of more than 200W. Although it is costly and consumes a lot of energy, it condenses water vapor in the air into liquid water through the refrigeration cycle, which has an efficient and stable dehumidification effect.

However, as one of the core components of the refrigeration system, the compressor needs to consider the starting power when starting. This is because at the moment of startup, the compressor needs to overcome the inertia and static friction within the system to achieve rotation and start compressing the refrigerant. This starting process requires consuming more electrical energy than running, that is, starting power.

Since the starting power may briefly exceed the running power, the starting characteristics of the system need to be considered when designing and selecting the compressor to ensure that the system can start and operate stably and reliably. In addition, for some applications that are sensitive to grid effects, such as large refrigeration systems or industrial uses, the impact of starting power on grid stability also needs to be considered