Micro blower

A micro blower, applied to a heat generating element, the micro blower comprising:

• a base metal layer;
• a flowing channel layer, connected to a top of the base metal layer, the flowing channel layer comprising:
• a first chamber;
• a second chamber;
• an inlet channel, linking to the first chamber and comprising an inlet channel inlet size and an inlet channel outlet size, the inlet channel inlet size being smaller than the inlet channel outlet size;
• a linking channel, linking to the first chamber and the second chamber and comprising a linking channel inlet size and a linking channel outlet size, the linking channel inlet size being smaller than the linking channel outlet size;
• and
• an outlet channel, linking to the second chamber and comprising an outlet channel inlet size and an outlet channel outlet size, the outlet channel inlet size being smaller than the outlet channel outlet size;
• a sandwich metal sheet, connected to a top of the flowing channel layer;
• a capping layer, connected to a top of the sandwich metal sheet and comprising two accommodating regions, the two accommodating regions located above the first chamber and the second chamber, respectively;
• and
• two first piezoelectric vibrators, located on tops and placed in centers of the two accommodating regions, respectively, and bonded on the top of the sandwich metal sheet, wherein each of the two first piezoelectric vibrators vibrates along a vibration direction when the two piezoelectric vibrators are driven, so as to change volumes of the first chamber and the second chamber to thereby generate an air flow.