Wave guide having an improved structure used in a microwave oven

Details Wave guide having an improved structure used in a microwave oven Wave guide having an improved structure used in a microwave oven

1996-11-08

1998-04-21

Leung, Philip H.

Electric heating

Microwave heating

Field modification

219748, 219695, H05B 672

Patent

active

057420335

ABSTRACT:
Disclosed is a wave guide having an improved structure and being used in a microwave oven, by which the food contained in a heating chamber is effectively heated. The wave guide has a housing attached to a side wall of the heating chamber, and has first, second, and third guide plates which are spaced at a predetermined distance apart from each other. The first guide plate has a first wave diffusing opening, the second guide plate has two second wave diffusing openings, and the third guide plate has four third wave diffusing openings. The second wave diffusing openings are off-set from the first wave diffusing opening. The third wave diffusing openings are off-set from the second wave diffusing openings. By the wave guide, superimposed high-frequency microwaves are radiated into the heating chamber, so the heating efficiency is improved and the cooking time is shortened. The microwave oven having the wave guide can prevent a waste of electrical power. By the wave guide, it is possible to use a transformer having a relatively small electrical capacity, so the manufacturing cost of the microwave oven is reduced.

REFERENCES:
patent: 4430538 (1984-02-01), Suzuki et al.
patent: 4733037 (1988-03-01), Nitta et al.
patent: 4808784 (1989-02-01), Ko
patent: 4937418 (1990-06-01), Boulard
patent: 5468940 (1995-11-01), Kang
patent: 5512736 (1996-04-01), Kang et al.

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