Patent ID: 7557331
Filing Date: 2009-07-07
Classification: H05B

Abstract:
1. A high frequency heating apparatus, comprising: an inverter power supply having a cooling fin; a magnetron for generating a microwave energy, the magnetron being supplied with an electric power from the inverter power supply; a cooling device for cooling down the inverter power supply and the magnetron; and an air guide portion for rectifying cooling air from the cooling device, the air guide portion including an inner partition and an outer partition which are inclined so as to define a convergent passage in a direction of airflow, wherein the cooling device has a propeller fan, and the air guide portion outer partition is configured to divide the cooling air blown from the propeller fan into an upper stream and a lower stream with respect to an axis of the propeller fan and guide the lower stream to the convergent passage and the upper stream toward the magnetron, and wherein the outer partition generates a negative pressure region outside the air guide portion to deflect the upper stream downward.