| 摘要 |
PCT No. PCT/US91/06480 Sec. 371 Date Jun. 22, 1992 Sec. 102(e) Date Jun. 22, 1992 PCT Filed Sep. 9, 1991.A combined microwave and conventionally heated oven includes first and second chambers separated from one another by a partition including first and second spaced panels which define a cavity therebetween. These panels are both metallic, except where the microwave waveguide passes through rectangular gaps in them, in which are situated rectangular, non-metallic, infrared-absorbing panels of the same size. A microwave generator is provided in the second chamber for generating microwaves for use in heating a product positioned in the first chamber. Convention heater(s) (gas and/or electrical resistance) is/are also provided. A stream of cooling air reduces the temperature within the cavity in order to insulate the second chamber from the transfer of heat emitted from the first chamber in operation of the conventional heater(s). Infrared radiation absorbing panels mentioned at the end of the microwave waveguide, and forming non-metallic sections of the above cavity's walls, permit the passage of microwaves from the microwave generator through the partition to the first chamber. This is in order to carry out microwave heating of the product while absorbing infrared radiation emitted from the hot first chamber that would otherwise travel back through the microwave waveguide and thermally damage the heat-sensitive microwave generator. A method for heating a product in this combination oven is also disclosed.
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