At present, there are two types of Oven motor: one is semi-enclosed and the other is fully-enclosed. A fully-enclosed motor is much better than a semi-enclosed motor, because during use, oil fume will pass through. The gap enters the inside of the motor, causing damage to the motor, resulting in weakened suction, increased noise, and reduced lifespan, while the full enclosure fully protects the motor from oil fume damage.