Thermal module with centrifugal blower and electronic assembly incorporating the same

A thermal module comprising:

• a centrifugal blower comprising a top lid defining a first air inlet therein, a bottom plate defining a second air inlet therein, a sidewall disposed between the top lid and the bottom plate, an air outlet in front of the sidewall, and an impeller disposed in an inner space formed between the top lid, the bottom plate and the sidewall, wherein a diameter of the first air inlet is greater than that of the second air inlet, an edge of the bottom plate defining the second air inlet and located adjacent to the air outlet offsetting a distance from an edge of the top lid defining the first air inlet and located adjacent to the air outlet towards a rotation axis of the impeller;
• and
• a fin assembly arranged at the air outlet of the centrifugal blower;
• wherein a center of the first air inlet offsets from a center of the second air inlet, the second air inlet being disposed within the first air inlet as viewed from a top of the centrifugal blower.

An electronic assembly comprising:

• an enclosure for an electronic product comprising a top cover and a bottom cover;
• and
• a thermal module arranged between the top cover and the bottom cover of the enclosure, comprising:
• a centrifugal blower and a fin assembly arranged in an air outlet of the centrifugal blower, the centrifugal blower comprising:
• a top lid defining a first air inlet therein, a bottom plate defining a second air inlet therein, a sidewall disposed between the top lid and the bottom plate, wherein the air outlet of the centrifugal blower is located in front of the sidewall, and an impeller is disposed in an inner space formed between the top lid, the bottom plate and the sidewall, wherein a first distance formed between a bottom surface of the top cover of the enclosure and a top surface of the top lid of the centrifugal blower is greater than a second distance formed between a top surface of the bottom cover of the enclosure and a bottom surface of the bottom plate of the centrifugal blower, and a first edge of the bottom plate defining the second air inlet and located adjacent to the air outlet offsets a distance from a first edge of the top lid defining the first air inlet and located adjacent to the air outlet inwardly toward a center of the second air inlet;
• and
• wherein a center of the first air inlet offsets from the center of the second air inlet, the second air inlet being disposed within the first air inlet as viewed from a top of the centrifugal blower.