Electric heating – Metal heating – Of cylinders
Patent
1987-12-22
1989-05-16
Leung, Philip H.
Electric heating
Metal heating
Of cylinders
219 1055R, 219400, 126 21A, H05B 664
Patent
active
048312258
ABSTRACT:
A microwave oven having a heater cooking device, a damper operated by the heat in the cooking chamber to control ventilation to the cooking chamber, a blower for cooling the cooking chamber exterior and electric components such as a magnetron, and temperature sensor for detecting the cooking chamber internal temperature. The microwave oven is characterized by a control circuit which actuates the blower immediately when the cooking chamber internal temperature at the time of starting the heater cooking operation is the same as or higher than a specified value considered high enough to actuate the damper and which actuates the ventilator with a delay of a specified time when the cooking chamber internal temperature is lower than the specified value.
REFERENCES:
patent: 3337147 (1965-06-01), Soong et al.
patent: 3875361 (1975-04-01), Fukui et al.
patent: 4369347 (1983-01-01), Shin
patent: 4450344 (1984-05-01), Sakoda et al.
patent: 4608474 (1986-08-01), Kohka
patent: 4635610 (1987-01-01), Nakanishi
patent: 4705928 (1987-11-01), Nakanishi
European Search Report dated May 31, 1988.
Hirata Kengo
Ishifuro Kathumi
Leung Philip H.
Sharp Kabushiki Kaisha
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