Radiating fin of magnetron

Abstract

The invention relates to a radiating fin of a magnetron, which is made of a metal plate through integrated molding and punching, wherein a positive pole hole for assembling a positive pole shell of the magnetron is reserved in the middle part of the radiating fin; the left side and the right side of the radiating fin are processed with a plurality of radiating blades through cutting and bending respectively so as to enlarge the contact area of the radiating fin and the air flowing by, and the radiating blades on the left side and the right side are distributed symmetrically; stream guidance bosses are formed on the periphery of the positive pole hole; and a fixed bend is formed at the tail end of the outer side of each radiating blade, the middle positions of the front side and the back side of the radiating fin are provided with a stream guidance passage respectively, and the stream guidance passages are formed by bending down two stream guidance plates cut on the radiating fin. The air flows out of the stream guidance passages and can form air flows on the leeward side of the positive pole shell to decrease the airflow dead zones on the leeward side, and the radiating fin can perform heat exchange with the air sufficiently, so the heat exchange capability of the radiating fin is improved, the temperature of the positive pole of the magnetron is reduced, and the working performance of the magnetron is improved.

Description

technical field [0001] The invention belongs to the technical field of magnetrons, and in particular relates to a method of setting guide passages at the middle positions of the front side and the rear side of the heat sink, so as to guide the air flow to the leeward side of the positive pole of the magnetron and improve the heat exchange capacity of the magnetron The heat sink of the magnetron. Background technique [0002] figure 1 It is a longitudinal sectional view of a magnetron structure in the prior art; figure 2 It is a structural schematic diagram of a magnetron heat sink in the prior art. Such as figure 1 , figure 2 As shown, the magnetron mainly includes: a positive electrode part; a negative electrode part; a magnetic pole part; and a microwave emitting part. The positive electrode part is composed of a barrel-shaped positive electrode case 11, and a plurality of radial blades 12 are formed on the inner wall of the positive electrode case 11, and the inner...

AI Technical Summary

Problems solved by technology

When the magnetron is in use, a large amount of heat generated by the positive electrode exchanges heat with the flowing air through the heat sink group. When the air flows to the positive electrode casing, it will form a forward flow along the cylindrical surface of the positive electrode casing, resulting in the leeward flow of the positive electrode casing. A dead zone for air flow is formed on the side, and normal heat exchange with the air cannot be performed in the dead zone. Although there are guide protrusions on the heat sink to guide the air flow, its function is not obvious, and it cannot guide a large amount of air to the dead zone. Inside, the heat dissipation of the heat sink is uneven, resulting in the concentration of heat on the leeward side of the positive shell, the temperature is too high, and the working performance of the magnetron is reduced

Images