The common design of the heat dissipation hole is directly opened under the cabinet panel, without any shelter, once the weather rains, the rain will be able to enter the distribution box, causing electrical damage. For example: the ordinary design of the heat dissipation hole, just like the smooth side wall of the high-rise building window, slightly slanted rain, you must close the window, otherwise the rain will easily enter the house, wet the carpet and furniture, and there is no correlation between the lower layer.
The most common heat dissipation method of the distribution box is to open a heat dissipation hole on the cabinet board in the concentrated area of the electrical components of the distribution box, and use the natural ventilation or air conditioning of the distribution room to achieve the empty heat exchange in the distribution box. The most easy to achieve the heat dissipation hole is to cut the runway heat dissipation hole on the distribution box board. This heat dissipation hole is undoubtedly the most economical and effective for indoor distribution box, and can be used outdoors, so the rain prevention effect is very poor. In addition, the possibility of small outdoor insects entering the distribution box is greatly increased, insects in the distribution box, crawling between the electrical components, may lead to a short circuit, and the body after the death of electric shock on the electrical efficiency is undoubtedly also affected.
Outdoor distribution boxes are generally located in sparsely populated or relatively less human activity places, such places are also snakes, mice, insects and other small animals often haunt. Due to the existence of the heat dissipation hole, the distribution box becomes an open box, if snakes, rats, insects and other small animals into the human box, it is possible to cause damage to the electrical appliances and circuits in the box, and serious accidents are more likely to cause circuit short circuit, explosion and other accidents.
Indoor distribution boxes generally do not have heat dissipation holes for the following reasons:
1. The indoor environment is relatively stable: the indoor temperature, humidity and other environmental factors are relatively stable, and the change range is small, so the heat dissipation demand of the distribution box is relatively small.
2. Safety considerations: The heat dissipation hole may introduce external dust, moisture or other impurities, which may have an adverse effect on the electrical system. In addition, the heat dissipation hole may also cause safety problems such as electric shock.
3. Appearance design: In order to keep the indoor environment clean and beautiful, the indoor distribution box is usually a closed design without a heat dissipation hole.
However, if the indoor distribution box runs for a long time with high load, or the indoor environmental factors change greatly, it may lead to high internal temperature of the distribution box. In this case, you can consider adding heat dissipation devices, such as cooling fans or heat sinks, to ensure the normal operation of the electrical system.