Abstract: This invention relates to a radiation fin structure of a magnetron and a magnetron which includes such a structure. The fin structure is capable of effectively radiating heat at a high temperature produced during oscillation of the magnetron. The magnetron can be used to generate microwaves which can be emitted into a cavity of a microwave oven. The radiation fin is capable of reducing a separation region in the rear of an anode of the magnetron by guiding cold air which passes through a cooling section of the magnetron to the back side of the anode to generate turbulence within the cooling section. The radiation fin structure incorporated in this invention includes a plurality of pairs of confronting protrusions formed at opposite side portions of the radiation fin. The fins are arranged externally of the magnetron anode equally spaced-apart from one another to guide cold air to the back side of the anode.

Abstract: Cooling apparatus of a magnetron having a plurality of embossed cooling fins for radiating high temperature heat generated by an anode of the magnetron. Each of the cooling fins includes an anode support boss for tightly receiving and supporting the anode, a pair of erected walls being provided at both sides of the cooling fin, and a plurality of embossments for causing cooling airflow to be forced toward the rear surface of the anode and providing a cooling passage. These embossments are provided between the anode and the erected walls in order to symmetrical to each other with respect to the cooling airflow. The embossments comprise a plurality of protruded embossments provided at a side of the cooling fin and a plurality of depressed embossments provided at the other side of the cooling fin. The protruded and depressed embossments have an interval which is gradually shortened such that it is minimized at the rear of the anode.

Abstract: Disclosed is a cooling apparatus for a magnetron, comprising a channel-shaped heat radiation plate for dissipating the heat generated from the anode of a magnetron, a yoke for supporting the heat radiation plate, an opening formed in both side walls of the heat radiation plate, and a secondary air passage formed in both side walls of the yoke for passing cooling-air to the opening, whereby the main stream of the cooling-air coming through the forward end of the heat radiation plate is pushed towards the anode in the rear region of the anode by the cooling-air driven through the secondary passage and opening into the rear region.