1. Generally common unqualified items of range hood include "air volume, air pressure, total pressure efficiency, signs and instructions, power connection and external flexible wire, input power and current, grounding measures, protection of touching live parts, stability and mechanical hazard, unreasonable design structure", etc. when we see these unqualified problems, we must know the unqualified problems What are the potential safety hazards of the product.

2. The protection of touching live parts is not safe, the product has defects in structural design, consumers can touch live parts or terminal blocks after taking down the detachable parts, and it may cause electric shock accidents. Electric shock is a huge potential safety hazard which can be fatal.

3. The heating project of the product is unqualified, and the temperature rise during the heating test of the lamp holder exceeds the standard limit value. Long time operation will cause the softening of the lamp holder material and the exposure of the l