Electric heating – Microwave heating – Enclosed cavity structure
Reexamination Certificate
2001-06-21
2002-07-02
Leung, Philip H. (Department: 3742)
Electric heating
Microwave heating
Enclosed cavity structure
C219S702000, C219S718000, C126S29900R
Reexamination Certificate
active
06414289
ABSTRACT:
CLAIM OF PRIORITY
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from an application for
A WALL MOUNT TYPE MICRO WAVE OVEN AND ITS CONTROL METHOD
earlier filed in the Korean Industrial Property Office on Mar. 12, 2001 and there duly assigned Serial No. 12687/2001 by that Office.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates in general to microwave ovens, and more particularly to a wall-mounted microwave oven and a method for controlling the same, wherein the power output of the microwave oven is controlled according to the operation of a hood motor such that the sum of the oven power output and the hood motor power output is constant, thereby preventing the oven from being overloaded.
2. Description of the Prior Art
Microwave ovens are generally adapted to perform a cooking operation based on a super-high frequency, in a different manner from cooking equipment of an external heating type based on thermal conduction and thermal radiation. Such a conventional microwave oven includes a super-high frequency oscillation tube, or a magnetron, for generating a super-high frequency of 2,470 MHz in response to high-voltage power applied thereto. The super-high frequency of 2,470 MHz generated from the magnetron causes an electric field to turn in direction at a rate of 2.45 billion times per second. Where this super-high frequency is applied to food, molecules of water in the food vibrate at a rate of 2.45 billion times per second while generating a large amount of heat, thereby cooking the food.
A conventional wall-mounted microwave oven employing the above-mentioned principle is operated simultaneously with a hood motor upon cooking food.
FIGS. 1
a
and
1
b
are graphs illustrating the operation of a conventional wall-mounted microwave oven.
As shown in
FIGS. 1
a
and
1
b,
the conventional wall-mounted microwave oven is operated simultaneously with a hood motor upon cooking food. For this reason, even in the initial cooking state requiring a large amount of power consumption, the microwave oven and the hood motor are together operated, resulting in an increase in power consumption.
Accordingly, there has been a need for a technique capable of controlling the operation of a microwave oven according to the operation of a hood motor in a cooking mode. However, a conventional wall-mounted microwave oven cannot control its power output level according to the operation of a hood motor, so it cannot effectively solve a power consumption increase or overload.
SUMMARY OF THE INVENTION
Therefore, the present invention has been made in view of the above problem, and it is an object of the present invention to provide a wall-mounted microwave oven and a method for controlling the same, wherein the power output level of the microwave oven is automatically controlled according to the operation of a hood motor such that the sum of the oven power output and the hood motor power output is constant.
In accordance with one aspect of the present invention, the above and other objects can be accomplished by the provision of a wall-mounted microwave oven including a hood unit including a hood motor; a magnetron; a transformer having primary and secondary coils, the transformer generating a high voltage in a turn ratio of the primary and secondary coils and supplying the generated high voltage to the magnetron; a hood unit driver for controlling an operation of the hood unit; power output switching means for controlling the level of a voltage to be supplied to the transformer; and a controller for controlling the power output switching means to control the level of the voltage to be supplied to the transformer according to a given operation mode of the hood unit.
In accordance with another aspect of the present invention, there is provided a method for controlling a wall-mounted microwave oven, including the step of controlling a power output level of the microwave oven according to a given operation mode of a hood motor such that the sum of the oven power output and the hood motor power output is constant.
REFERENCES:
patent: 4227062 (1980-10-01), Payne et al.
patent: 4724291 (1988-02-01), Inumada
patent: 4886046 (1989-12-01), Welch et al.
patent: 6025582 (2000-02-01), Kang et al.
patent: 6072169 (2000-06-01), Kang et al.
patent: 6093922 (2000-07-01), Kim
patent: 6304046 (2001-10-01), Lee et al.
Cho Young-Won
Kim Tae-Soo
Lee Sung-Ho
Bushnell , Esq. Robert E.
Leung Philip H.
Samsung Electronics Co,. Ltd.
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