Exhaust pipe of magnetron for microwave oven

Abstract

An exhaust pipe for a magnetron used in a microwave oven, comprising a tubular body and a fixed wall extending outward from the outside of the pipe body and bending downwards, the exhaust pipe is arranged above the antenna cover of the magnetron On the ceramic ring, and the lower part of the ceramic ring is fixed with the antenna cover, the top of the tube body is sealed after vacuuming, and the length of the tube body is reduced by 20‑25% after sealing; the lower end of the fixed wall extends to the farthest plane and the tube The distance between the planes where the lowest point of the body lies is reduced by 18‑21%. By changing the reserved length of the upper end of the pipe body and the length of the lower end of the pipe body protruding from the fixed wall, the choke capacity of the exhaust pipe for the third harmonic and the fourth harmonic is improved, and the useless high noise generated during the operation of the magnetron is correspondingly suppressed. Frequency harmonics, without causing changes in the characteristics of the magnetron, improve the electromagnetic compatibility characteristics of the magnetron used in microwave ovens.

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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