Electric heating – Microwave heating – Enclosed cavity structure
Patent
1996-05-02
1998-09-29
Leung, Philip H.
Electric heating
Microwave heating
Enclosed cavity structure
126 21A, H05B 664
Patent
active
058147934
ABSTRACT:
An air flow system for cooling heat generating elements, such as a magnetron and high voltage transformer, of microwave ovens is disclosed. Air inlet holes are formed on the casing's bottom at a portion in the front of the fan. Air outlet holes are formed on the casing's rear wall. A fan is set in an air guide wall standing on the casing's bottom at a portion between the inlet holes and the heat generating elements. In the system, the outside air is introduced into the casing through the inlet holes by the blowing force of the fan and cools the heat generating elements prior to exhausting to the atmosphere through the outlet holes. The air guide wall eliminates reverse flow of the air in the casing. The cavity has air guide holes on one side wall thereof and cavity air exhaust holes on the other wall thereof, so the air is directly introduced into the cavity.
REFERENCES:
patent: 4546225 (1985-10-01), McCammon
patent: 4623771 (1986-11-01), Sakino
patent: 4705928 (1987-11-01), Nakanishi
patent: 4812617 (1989-03-01), Takeuji et al.
patent: 5393961 (1995-02-01), Umekage et al.
Leung Philip H.
LG Electronics Inc.
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