Exhaust pipe of magnetron for microwave oven

Abstract

The invention relates to an exhaust pipe of a magnetron for a microwave oven. The exhaust pipe comprises a tubular pipe body and a fixed wall extending outwardly from the outer portion of the pipe body and bending downwardly. The exhaust pipe is arranged at a ceramic ring above an antenna sealing cover of the magnetron; and the lower portion of the ceramic ring is fixedly with the antenna sealing cover. The top end of the pipe body is sealed after vacuum pumping; and the length of the sealed pipe body is reduced by 20 to 25%. The distance between the plane where the extending farthest position of the lower end of the fixed wall is located and the plane where the bottom end of the pipe body is located is reduced by 18 to 21%. The choke capability of the exhaust pipe on the third harmonic and the fourth harmonic can be improved by changing the retained length of the upper end of the pipe body and the length of the protruded fixed wall at the lower end of the pipe body; and the useless high-frequency harmonic wave generated by magnetron working can be suppressed correspondingly. On the premise that the characteristic of the magnetron is not changed, the electromagnetic compatible characteristic of the magnetron for the microwave oven is improved.

Description

technical field [0001] The invention belongs to the technical field of magnetrons, and in particular relates to an exhaust pipe of a magnetron for a microwave oven that improves the electromagnetic compatibility characteristics of the magnetron while keeping the characteristics of the magnetron unchanged. 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 the position of the exhaust pipe of the magnetron in the prior art. [0003] Such as Figure 1 to 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 and outer rings are welded in the upper and lower groov...

AI Technical Summary

Problems solved by technology

[0015] However, the exhaust pipe of the magnetron in the prior art cannot effectively suppress the high-frequency harmonics of the magnetron, and part of the high-frequency harmonics will leak out from the exhaust structure, thereby making the electromagnetic compatibility of the magnetron for microwave ovens deterioration, thereby adversely affecting the human body and electrical components around the microwave oven

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