MAGNETRON

• Main Authors: ISHIMARU NAOAKI, YAMASHITA HIDEKAZU, HIROTA MOTONARI
• Format: Patent
• Language: English
• Published: 11.05.1999
• Edition: 6
• Subjects: BLASTING; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HEATING; LIGHTING; MECHANICAL ENGINEERING; OTHER DOMESTIC STOVES OR RANGES; RANGES; VENTILATING; WEAPONS

PROBLEM TO BE SOLVED: To increase cooling air quantity so as to improve cooling efficiency and accomplish miniatuarization of a magnetron by widening intervals between a plurality of radiating fins leading cooling air toward a positive electrode cylinder on the inlet port side. SOLUTION: For cooling the heat generated from a positive electrode cylinder 5, cooling air is let flow from an inlet port side to an outlet port side. As intervals between a plurality of heat radiating fins 4 installed in the positive electrode cylinder 5 are expanded on the inlet port side, air inside the intake port side area ranging from the uppermost radiating fin 4 to the lowermost radiating fin 4 is led inward and reaches the positive electrode cylinder 5 with its flow passage narrowed so as to be discharged from the outlet port side to the outside. Therefore, flow speed of the cooling air reaching the positive electrode cylinder 5 is faster than that in the inlet port, so that air quantity colliding against the positive electrode cylinder 5 per a unit time is increased and cooling efficiency is improved. The side wall is formed of a high heat conductive material, while the upper and lower heat radiating fins 4 are connected together on the inlet/outlet port side desirably. From the standpoint of unification of temperature and improvement in cooling efficiency, the heat radiating fins 4 are formed of porous wall faces preferably.